2024-03-29T07:52:51Zhttps://www.repo.uni-hannover.de/oai/requestoai:www.repo.uni-hannover.de:123456789/672022-12-02T19:19:55Zcom_123456789_15col_123456789_16ddc:000doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Nutzerzentrierte Entwicklung des Bediendialoges für die Münchner Fahrkartenautomaten
Schneider, Irka
Fahrkartenautomat
Bediendialog
nutzerzentrierte Entwicklung
Fokusgruppe
Nutzertests
Prototypenentwicklung
ticket machine
group interview
focus group
usability
prototyping
operating dialog
Fahrkartenautomaten und Kunden – eine Geschichte voller Missverständnisse. Wie oft ist es Ihnen schon so ergangen, dass Sie an einem Automaten ein Ticket kaufen wollten und entweder gar nicht zum Ziel kamen oder nach langem Hin und Her immer noch nicht so recht sicher waren, das richtige Ticket erhalten zu haben. Genau das wollten wir ändern. Unser Ziel war es, Kunden das Gefühl zu vermitteln, vom Automaten verstanden zu werden, und nicht Verständnis für die Eigenheiten des Automaten aufbringen zu müssen. Der vorliegende Beitrag stellt am Beispiel der Entwicklung des Bediendialoges für die stationären Fahrkartenautomaten der Münchner Verkehrsgesellschaft (MVG) vor, wie eine nutzerzentrierte Entwicklung der Bedienabläufe an einem digitalen Kommunikationsinstrument wie einem Ticketautomaten funktionieren kann.
2015-10-07T14:01:29Z
2015-10-07T14:01:29Z
2012
Article
Text
Schneider, Irka: Nutzerzentrierte Entwicklung des Bediendialoges für die Münchner Fahrkartenautomaten. In: i-com 11 (2012), Nr. 2, S. 55-58. DOI: http://dx.doi.org/10.1524/icom.2012.0027
http://www.repo.uni-hannover.de/handle/123456789/67
http://dx.doi.org/10.15488/49
ger
1618-162X
http://dx.doi.org/10.1524/icom.2012.0027
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Berlin : Walter de Gruyter
oai:www.repo.uni-hannover.de:123456789/682022-12-02T19:19:55Zcom_123456789_15col_123456789_16doc-type:Articlestatus-type:updatedVersiondoc-type:Textopen_accessddc:380ddc:600
Von der Usability zur Ertragssteigerung
Schneider, Irka
Probst, Gerhard
Öffentlicher Personennahverkehr
Kundenorientierung
Vertrieb
Automatisierung
grafische Benutzeroberfläche
Bedienoberflächen
local public transport
customer focus
distribution
automation
graphical user interface
Obwohl die Automatisierung des Vertriebs im ÖPNV durch Automaten und Abonnementsysteme und moderne Vertriebswege (Handy- und Online-Tickets) für viele Kunden bequeme Formen des Ticketserwerbs darstellen, gibt es zahlreiche Kundengruppen, für die diese neuen Vertriebskanäle ein großes Nutzungshindernis sind. Im Beitrag werden Wege aufgezeigt, wie die sogenannten Gebrauchstauglichkeit (engl. Usability) systematisch verbessert werden kann und dadurch automatisierte Vertriebskanäle zu aktiven Vertriebswegen entwickelt werden können. Erfahrungen dazu lassen sich aus einem Bereich der Wirtschaft übertragen, in dem Usability der zentrale Erfolgsfaktor ist, dem Internet. Damit der Kaufprozess erfolgreich abgeschlossen wird, reicht es nicht, die Kunden auf die Seite zu locken und ihnen die angebotenen Produkte näher zu bringen. Abbruchraten werden systematisch erhoben und ausgewertet. Bei Onlineshops liegen die Abbruchraten zwischen 27 und 66 %. Im ÖPNV gibt es dazu kaum Untersuchungsmaterial.
2015-10-07T16:21:49Z
2015-10-07T16:21:49Z
2011
Article
Text
Schneider, Irka; Probst, Gerhard: Von der Usability zur Ertragssteigerung. In: Nahverkehrspraxis (2011), Nr. 5, S. 30-31. ISSN: 0342-9849
http://www.repo.uni-hannover.de/handle/123456789/68
http://dx.doi.org/10.15488/50
ger
0342-9849
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Dortmund : Arnold
oai:www.repo.uni-hannover.de:123456789/16812022-12-02T15:02:18Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Improving Parking Availability Maps using Information from Nearby Roads
Bock, Fabian
Sester, Monika
crowd-sensing
parking availability estimation
parking statistics
similarity measures
spatial data analysis
spatial interpolation
Parking search traffic causes increased travel times and air pollution in many cities. Real-time parking availability maps are expected to help drivers to find a parking space faster and thus to reduce parking search traffic. A possibility to create such maps is the aggregation of parking availability information from crowdsourcing solutions like probe vehicles and mobile phone applications. Since these sources cannot sense the whole city at the same time, estimation methods are necessary to fill uncovered areas. This paper investigates the estimation of parking availability based on spatial methods using sensor data from San Francisco. First, spatial similarities in parking availability are evaluated for different aspects like time of day and number of parking spaces depending on the distance to reveal the parking characteristics. Then, interpolation methods are examined to estimate parking availability in unobserved road segments. Results show that relevant similarities mainly exist for short distances of less than hundred meters. Their similarity values are lower than the temporal similarity even for multiple hours of time gap. Nevertheless, spatial information is useful to interpolate parking availability. Investigated interpolation methods show significantly better results than random guess. Inverse distance weighting method outperforms a simple averaging by up to 5%.
2017-06-21T06:56:19Z
2017-06-21T06:56:19Z
2016
Article
Text
Bock, F.; Sester, M.: Improving Parking Availability Maps using Information from Nearby Roads. In: Transportation Research Procedia 19 (2016), S. 207-214. DOI: https://doi.org/10.1016/j.trpro.2016.12.081
http://www.repo.uni-hannover.de/handle/123456789/1681
http://dx.doi.org/10.15488/1656
eng
Transportation Research Procedia 19 (2016)
2352-1465
https://doi.org/10.1016/j.trpro.2016.12.081
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam : Elsevier B.V.
oai:www.repo.uni-hannover.de:123456789/17142022-12-02T15:03:40Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
A multi-layer social force approach to model interactions in shared spaces using collision prediction
Rinke, N.
Schiermeyer, C.
Pascucci, F.
Berkhahn, V.
Friedrich, B.
microscopic simulation
mixed traffic
Shared space
social force model
traffic conflict
In shared space environments the movements of road users is not regulated by traffic rules, but is the result of spontaneous interaction between traffic users, who negotiate the priority according to social rules such as eye contact or courtesy behavior. However, appropriate micro simulation tools, which can reproduce the operation of shared spaces, are currently lacking. In this paper, a multi-layer approach for representing the movement of road users and their interaction, based on the Social Force Model, is developed. In a free-flow layer a realistic path is calculated for each user towards his destination, while a conflict layer is used for detecting possible conflict situations and computing an appropriate reaction. The novelty of this work in the field of shared space modeling is in the implementation of group dynamics and a SFM based approach for cyclists. The presented approach is qualitatively tested in different traffic situations involving cyclists, pedestrians and pedestrian groups, and shows realistic behavior. © 2017 The Authors. Published by Elsevier B.V.
2017-07-17T07:35:01Z
2017-07-17T07:35:01Z
2017
Article
Text
Rinke, N.; Schiermeyer, C.; Pascucci, F.; Berkhahn, V.; Friedrich, B.: A multi-layer social force approach to model interactions in shared spaces using collision prediction. In: Transportation Research Procedia 25 (2017), S. 1249-1267. DOI: https://doi.org/10.1016/j.trpro.2017.05.144
http://www.repo.uni-hannover.de/handle/123456789/1714
http://dx.doi.org/10.15488/1689
eng
Transportation Research Procedia 25 (2017)
2352-1457
https://doi.org/10.1016/j.trpro.2017.05.144
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam : Elsevier BV
oai:www.repo.uni-hannover.de:123456789/17442022-12-02T15:03:40Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
GIS-based identification and assessment of suitable meeting point locations for ride-sharing
Czioska, Paul
Mattfeld, Dirk C.
Sester, Monika
Carpooling
GIS Analysis
Meeting Point
Pickup Location
Rendezvous Point
Ride-Sharing
Ride-Sharing or carpooling is a common means to utilize available but so far unused vehicle seat capacity. To establish a shared ride, it is necessary that the driver and the passengers agree on a meeting point. In most existing applications, the pickup location of a passenger is assumed to be on his or her doorstep. However, many people are willing to walk a certain distance to meet at a place where a safe and convenient boarding can be established, while at the same time the necessary detour of the driver can be kept acceptable. In this contribution we introduce an assessment scheme for meeting point locations based on results of an online survey retrieving the stated acceptance of meeting point locations and the relevance of the available facilities like parking places, seating, shelter and light. To this end, the infrastructure of a medium-sized European city is assumed to show exemplary how the amount and the distribution of suitable meeting point locations affects the performance and convenience of ride-sharing.
2017-07-17T09:16:16Z
2017-07-17T09:16:16Z
2017
Article
Text
Czioska, P.; Mattfeld, D.C.; Sester, M.: GIS-based identification and assessment of suitable meeting point locations for ride-sharing. In: Transportation Research Procedia 22 (2017), S. 314-324. DOI: https://doi.org/10.1016/j.trpro.2017.03.038
http://www.repo.uni-hannover.de/handle/123456789/1744
http://dx.doi.org/10.15488/1719
eng
Transportation Research Procedia 22 (2017)
2352-1465
2352-1457
https://doi.org/10.1016/j.trpro.2017.03.038
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam : Elsevier BV
oai:www.repo.uni-hannover.de:123456789/27002022-12-13T15:12:27Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Does Safeguards Need Saving? Lessons from the Ukraine-Passenger Cars Dispute
Gnutzmann-Mkrtchyan, Arevik
Lester, Simon
WTO
Ukraine–Passenger Cars
GATT
safeguard
The Panel Report in Ukraine-Passenger Cars provides an opportunity to revisit an old debate over the role of safeguard measures in the WTO. With regard to the legal findings, the Panel followed the established jurisprudence in this area, and found a number of violations of the Safeguards Agreement. With regard to the economics, we delve more deeply into the economic and political background of the safeguards investigation. Ukraine was hit by the economic crisis shortly after its WTO accession that significantly liberalized import tariffs on passenger cars. Next, we offer a de novo look at the injury and causation issues in this case, and discuss the challenges of an industry reliant on offshored production that sees a safeguard as a mechanism to attract foreign direct investment (FDI) for production. We conclude with an assessment of the operation of the WTO's safeguards regime, along with some tentative suggestions for reform. Overall, our examination of the economic analysis by the investigating authority and the legal review by the WTO Panel raises questions about particular aspects of the domestic and WTO processes, but concludes that the system worked well in this case. Copyright © Arevik Gnutzmann-Mkrtchyan And Simon Lester 2017.
2018-01-29T12:57:24Z
2019-03-10T23:05:03Z
2017
Article
Text
Gnutzmann-Mkrtchyan, A.; Lester, S.: Does Safeguards Need Saving? Lessons from the Ukraine-Passenger Cars Dispute. In: World Trade Review 16 (2017), Nr. 2, S. 227-251. DOI: https://doi.org/10.1017/S1474745616000525
http://www.repo.uni-hannover.de/handle/123456789/2700
http://dx.doi.org/10.15488/2674
eng
World Trade Review 16 (2017), Nr. 2
1474-7456
https://doi.org/10.1017/S1474745616000525
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Cambridge : Cambridge University Press
oai:www.repo.uni-hannover.de:123456789/33522022-12-02T15:03:40Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Developing a micro-simulation tool for autonomous connected vehicle platoons used in city logistics
Haas, Inbal
Friedrich, Bernhard
autonomous vehicles
city logistics
connected vehicles
micro-simulation
platooning
The future holds great promise for the use of autonomous vehicles. Many daily activities which require the use of extensive manpower, will soon be performed with much less human interference, if at all. City logistics is an example of one such arena, which will most surely benefit from the introduction of autonomous vehicles. Autonomous vehicles will replace human couriers in the near future, and conduct delivery tasks. Given the current trends in the freight industry, this will probably be integrated with the use of platoons, which has recently gained an increasing interest in the freight sector. In this paper we present an urban freight delivery system, which is based on the use of autonomous connected platoons. In the presented system, autonomous vehicles carry out delivery tasks, traveling from an origin depot to a customer, by joining platoons along the way, which bring them closer to their destination. Many issues can be analysed with respect to the proposed system. In this paper, we choose to focus on the travel time issue. In particular, we examine the effects different platoon configurations (total number of platoons in the network and their size) have on the travel time of the vehicles performing the delivery tasks. In order to examine the proposed system, a traffic microsimulation is used. A case study is presented, demonstrating the effects of varying the platoon number and size on the travel time. The results show a relation between the configuration of platoons and the travel time, especially with respect to the delay in intersections, and the waiting time while switching platoons. © 2017 The Authors. Published by Elsevier B.V.
2018-05-18T10:17:59Z
2018-05-18T10:17:59Z
2017
Article
Text
Haas, I.; Friedrich, B.: Developing a micro-simulation tool for autonomous connected vehicle platoons used in city logistics. In: Transportation Research Procedia 27 (2017), S. 1203-1210. DOI: https://doi.org/10.1016/j.trpro.2017.12.084
http://www.repo.uni-hannover.de/handle/123456789/3352
http://dx.doi.org/10.15488/3322
eng
Transportation Research Procedia 27 (2017)
2352-1465
https://doi.org/10.1016/j.trpro.2017.12.084
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam : Elsevier B.V.
oai:www.repo.uni-hannover.de:123456789/33642022-12-02T15:04:49Zcom_123456789_1col_123456789_4doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Evaluation of Alternative Paths for Reliable Routing in City Logistics
Groß, Patrick-Oliver
Ehmke, Jan F.
Haas, Inbal
Mattfeld, Dirk C.
alternative path
city logistics
reliability
routing
shortest path
travel time information
Due to varying traffic volumes and limited traffic infrastructure in urban areas, travel times are uncertain and differ during the day. In this environment, city logistics service providers (CLSP) have to fulfill deliveries in a cost-efficient and reliable manner. To ensure cost-efficient routing while satisfying promised delivery dates, information on the expected travel times between customers needs to be considered appropriately. Typically, vehicle routing is based on information from shortest paths between customers, to determine the cost-minimal sequence of customer visits. This information is usually precomputed using shortest path algorithms. Most approaches merely consider a single (shortest) path, based on a single cost value (e.g., distance or average travel time). To incorporate information on travel time variation, it might be of value to consider alternative paths and more sophisticated travel time models such as Interval Travel Times (ITT). In this work, we investigate the incorporation of alternative paths into city logistics vehicle routing. For this purpose, we compare our approach to classical shortest path approaches within a vehicle routing problem. Our approach considers a set of alternative paths and incorporates ITT. Experiments are conducted within an exemplary city logistics setting. Computational results show that the consideration of alternative paths allows to select better paths with regard to a trade-off between efficiency and reliability when travel times are varying. © 2017 The Authors. Published by Elsevier B.V.
2018-05-18T12:03:53Z
2018-05-18T12:03:53Z
2017
Article
Text
Groß, P.-O.; Ehmke, J.F.; Haas, I.; Mattfeld, D.C.: Evaluation of Alternative Paths for Reliable Routing in City Logistics. In: Transportation Research Procedia 27 (2017), S. 1195-1202. DOI: https://doi.org/10.1016/j.trpro.2017.12.067
http://www.repo.uni-hannover.de/handle/123456789/3364
http://dx.doi.org/10.15488/3334
eng
Transportation Research Procedia 27 (2017)
2352-1465
https://doi.org/10.1016/j.trpro.2017.12.067
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam : Elsevier B.V.
oai:www.repo.uni-hannover.de:123456789/45642022-12-02T19:22:08Zcom_123456789_4548com_123456789_3565col_123456789_4549doc-type:BookPartdoc-type:Textopen_accessstatus-type:publishedVersionddc:620ddc:380
Lückenlose Sicherheit für Gleisanlagen und Bauwerke – permanente Gleisüberwachung mittels Sensortechnologie
Heiniger, Thomas
Kramer, Jörg
TrackControl
Gleissensoren
Gleisüberwachung
Gleismonitoring
Gleislagenkontrolle
Sicherheit Bahnanlagen
Anhand der beiden Projekte "ABS Karlsruhe-Basel, Tunnel Rastatt" und "Pressrohrvortrieb Bahnhof Ingolstadt" wird der Einsatz von neuer Sensortechnologie für Gleisüberwachungen vorgestellt. Dabei liefert das System "Amberg TrackControl" im Minutentakt zuverlässig Resultate zu Überhöhungen, Verwindungen, vertikalen Pfeilhöhen und Setzungsmulden. Der Tunnel Rastatt unterquert die bestehende Hochgeschwindigkeitsstrecke der DB in einem flachen Winkel auf einer Länge von ca. 500 m. Um die Sicherheit des laufenden Betriebs zu gewährleisten, forderte die DB neben der geodätischen Überwachung ein zweites, redundantes System, welches in der nebelreichen Region unabhängig von der Witterung zuverlässig arbeitet und alarmiert. Unter dem Gleisfeld mit 29 Gleisen im Bahnhof Ingolstadt wurde ein Kanalisationsstollen mittels Pressrohrvortrieb für die Stadtwerke Ingolstadt gebaut. Der Rangierbahnhof ist der Hauptverladepunkt für die neuen Autos von Audi und ein reibungsloser Betrieb der Bahnanlage während den Vortriebsarbeiten war zwingend zu gewährleisten.Anhand der beiden Projekte "ABS Karlsruhe-Basel, Tunnel Rastatt" und "Pressrohrvortrieb Bahnhof Ingolstadt" wird der Einsatz von neuer Sensortechnologie für Gleisüberwachungen vorgestellt. Dabei liefert das System "Amberg TrackControl" im Minutentakt zuverlässig Resultate zu Überhöhungen, Verwindungen, vertikalen Pfeilhöhen und Setzungsmulden. Der Tunnel Rastatt unterquert die bestehende Hochgeschwindigkeitsstrecke der DB in einem flachen Winkel auf einer Länge von ca. 500 m. Um die Sicherheit des laufenden Betriebs zu gewährleisten, forderte die DB neben der geodätischen Überwachung ein zweites, redundantes System, welches in der nebelreichen Region unabhängig von der Witterung zuverlässig arbeitet und alarmiert. Unter dem Gleisfeld mit 29 Gleisen im Bahnhof Ingolstadt wurde ein Kanalisationsstollen mittels Pressrohrvortrieb für die Stadtwerke Ingolstadt gebaut. Der Rangierbahnhof ist der Hauptverladepunkt für die neuen Autos von Audi und ein reibungsloser Betrieb der Bahnanlage während den Vortriebsarbeiten war zwingend zu gewährleisten.
2019-03-07T08:37:51Z
2019-03-14T23:05:03Z
2019
BookPart
Text
Heiniger, Thomas; Kramer, Jörg: Lückenlose Sicherheit für Gleisanlagen und Bauwerke – permanente Gleisüberwachung mittels Sensortechnologie. In: Tagungsband Geomonitoring 2019, S. 187-206. DOI: https://doi.org/10.15488/4522
https://www.repo.uni-hannover.de/handle/123456789/4564
http://dx.doi.org/10.15488/4522
ger
https://creativecommons.org/licenses/by-nc-nd/3.0/de/
CC BY-NC-ND 3.0 DE
Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/45662022-12-02T19:22:08Zcom_123456789_4548com_123456789_3565col_123456789_4549doc-type:BookPartdoc-type:Textopen_accessstatus-type:publishedVersionddc:620ddc:380
Ein neues Verfahren zum MEMS-basierten Brückenmonitoring - Zielsetzung und Statusbericht
Kemkes, Eva
Rüffer, Jürgen
Omidalizarandi, Mohammad
Diener, Dmitri
Paffenholz, Jens-André
Neumann, Ingo
MEMS
Beschleunigungssensoren
Brückenmonitoring
Low-Cost
Das Thema "Marode Brücken in Deutschland" gerät in (un-)regelmäßigem Abstand immer wieder in den Fokus der deutschen Nachrichten. Als grundlegende Ursache gilt die alternde Bausubstanz sowie der zunehmende Schwerlastverkehr, der bei dem Bau der meisten Brücken nicht einkalkuliert wurde. Mit steigender Aktualität und Dringlichkeit der Thematik nimmt die Bedeutung eines Geomonitorings zur Überwachung von Bewegungen und Deformationen weiter zu. Neben den meist sehr kostenintensiven geodätischen Sensoren wie beispielsweise einem Tachymeter bilden auch sogenannte Low-Cost-Sensoren eine Möglichkeit, Brückenbauwerke zu überwachen. In einem von der ZIM-Initiative des Bundesministeriums für Wirtschaft und Energie geförderten Projekt wird sich dieser Thematik gewidmet. Ziel ist es, mikroelektromechanische Systeme (MEMS) für die Detektion von schädigungsrelevanten Bauwerksparametern auf ihre Tauglichkeit dafür zu prüfen und diese wenn möglich einzusetzen. Angefangen bei der Entwicklung von Sensoren mit einem MEMS-Beschleunigungssensor als Kernstück, über Kalibrierungen und Testmessungen unter Laborbedingungen bis hin zu Messungen an einem realen Brückenbauwerk, wurde ein Mess- und Auswerteverfahren entwickelt und validiert. Derzeit wird es Schritt für Schritt verbessert.
2019-03-07T08:37:51Z
2019-03-14T23:05:03Z
2019
BookPart
Text
Kemkes, Eva; Rüffer, Jürgen; Omidalizarandi, Mohammad; Diener, Dmitri; Paffenholz, Jens-André; Neumann, Ingo: Ein neues Verfahren zum MEMS-basierten Brückenmonitoring - Zielsetzung und Statusbericht. In: Tagungsband Geomonitoring 2019, S. 215-226. DOI: https://doi.org/10.15488/4524
https://www.repo.uni-hannover.de/handle/123456789/4566
http://dx.doi.org/10.15488/4524
ger
https://creativecommons.org/licenses/by/3.0/de/
CC BY 3.0 DE
Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/50472022-12-02T15:03:41Zcom_123456789_1col_123456789_4doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Group Affective Tone and Team Performance: A Week-Level Study in Project Teams
Paulsen, Hilko
Klonek, Florian E.
Schneider, Kurt
Kauffeld, Simone
Feeling
Team composition
Distress
Psychology
Group affective tone
Hostility
Affect (psychology)
Anxiety
Social psychology
Group affective tone is an emergent state that can be shared by group members during interdependent tasks. Groups can experience positive group affective tone (PGAT), a shared feeling of e.g., excitement, enthusiasm, or activation as well as negative group affective tone (NGAT), a shared feeling of e.g., distress, anxiety, and hostility. So far, previous cross-sectional research suggests that PGAT and NGAT are related to team performance outcomes. However, little is known about how the dynamic and fluctuating group affective states are related to team performance over an extended period of time. Therefore, the current study investigated the relation between PGAT, NGAT, and performance over the course of 34 software engineering projects. We hypothesized that PGAT is positively related to team performance, whereas NGAT is negatively related to team performance. Based on the punctuated equilibrium model and the feeling-as-information-theory we expected that these associations become stronger in the second half of the project. Using week level design with 165 participants in 34 software engineering teams, we repeatedly assessed PGAT, NGAT, and team performance over 14 weeks. Data were analyzed using multilevel structural equation modeling. As expected, PGAT was positively related to team performance, whereas NGAT was negatively related to team performance – between teams over the course of the projects as well as within teams over time. More importantly, the weekly relationships were stronger in the second half of the project. Our study indicates that weekly variations in group affective tone are more relevant after projects reach a temporal midpoint. We discuss theoretical and practical implications for project teams.
2019-06-26T11:10:02Z
2019-06-26T11:10:02Z
2016
Article
Text
Paulsen, Hilko; Klonek, Florian E.; Schneider, Kurt; Kauffeld, Simone: Group Affective Tone and Team Performance: A Week-Level Study in Project Teams. In: Frontiers in Communication 1 (2016), 7. DOI: https://doi.org/10.3389/fcomm.2016.00007
https://www.repo.uni-hannover.de/handle/123456789/5047
http://dx.doi.org/10.15488/5003
eng
Frontiers in Communication 1 (2016)
2297-900X
https://doi.org/10.3389/fcomm.2016.00007
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
Lausanne : Frontiers Media S.A.
oai:www.repo.uni-hannover.de:123456789/51142022-12-02T15:06:09Zcom_123456789_1col_123456789_6doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:620ddc:380
Surface roughness of real operationally used compressor blade and blisk
Gilge, Philipp
Kellersmann, Andreas
Friedrichs, Jens
Seume, Jörg R.
aircraft engine
blisk blades
compressor blades
operationally stressed surfaces
Surface roughness
Aircraft
Aircraft engines
Compressors
Deterioration
Engines
High pressure effects
Aircraft engine maintenance
blisk blades
Compressor blades
Compressor performance
High pressure compressor
Roughness parameters
Specific fuel consumption
Three-dimensional laser scanning
Surface roughness
Deterioration of axial compressors is in general a major concern in aircraft engine maintenance. Among other effects, roughness in high-pressure compressor reduces the pressure rise and thus efficiency, thereby increasing the specific fuel consumption of an engine. Therefore, it is important to improve the understanding of roughness on compressor blading and their impact on compressor performance. To investigate the surface roughness of rotor blades of a compressors, different stages of an axial high-pressure compressor and a first-stage blisk (BLade–Integrated–dISK) of a regional aircraft engine is measured by a three-dimensional laser scanning microscope. Fundamental types of roughness structures can be identified: impacts in different sizes, depositions as isotropically distributed single elements with steep flanks and anisotropic roughness structures direct approximately normal to the flow direction. To characterise and quantify the roughness structures in more detail, roughness parameters were determined from the measured surfaces. The quantification showed that the roughness height varies through the compressor depending on the stage, position and the blade side. Overall complex roughness structures of different shape, height and size are detected regardless of the type of the blades.
2019-07-02T08:17:30Z
2019-07-02T08:17:30Z
2019
Article
Text
Gilge, P.; Kellersmann, A.; Friedrichs, J.; Seume, J.R.: Surface roughness of real operationally used compressor blade and blisk. In: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233 (2019), Nr. 14, S. 5321-5330. DOI: https://doi.org/10.1177/0954410019843438
https://www.repo.uni-hannover.de/handle/123456789/5114
http://dx.doi.org/10.15488/5070
eng
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233 (2019), Nr. 14
0954-4100
https://doi.org/10.1177/0954410019843438
https://creativecommons.org/licenses/by-nc/4.0/
CC BY-NC 4.0 Unported
London : SAGE Publications Ltd.
oai:www.repo.uni-hannover.de:123456789/65382022-12-02T07:47:03Zcom_123456789_1com_123456789_2961col_123456789_9col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Die deutsche Banane : Wirtschafts- und Kulturgeschichte der Banane im Deutschen Reich 1900 - 1939
Wilke, Kerstin
Banana trade
colonial groceries
product history
[no abstract]
2019-11-15T08:02:48Z
2019-11-15T08:02:48Z
2004
DoctoralThesis
Text
Wilke, Kerstin: Die deutsche Banane : Wirtschafts- und Kulturgeschichte der Banane im Deutschen Reich 1900 - 1939. Hannover : Universität, Diss., 2004, 374 S.
https://www.repo.uni-hannover.de/handle/123456789/6538
http://dx.doi.org/10.15488/6486
ger
urn:nbn:de:gbv:089-3902704828
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Universität
oai:www.repo.uni-hannover.de:123456789/66452022-12-02T07:50:31Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Entwicklung von Konzepten für eine zukunftsfähige Siedlungs- und Verkehrsplanung im Kathmandu-Tal
Pant, Ranjan Nath
Urban planning
traffic planning
Kathmandu
[no abstract]
2019-11-15T12:02:16Z
2019-11-15T12:02:16Z
2005
DoctoralThesis
Text
Pant, Ranjan Nath: Entwicklung von Konzepten für eine zukunftsfähige Siedlungs- und Verkehrsplanung im Kathmandu-Tal. Hannover : Universität, Diss., 2005, 204 S.
https://www.repo.uni-hannover.de/handle/123456789/6645
http://dx.doi.org/10.15488/6593
ger
urn:nbn:de:gbv:089-4807467535
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Universität
oai:www.repo.uni-hannover.de:123456789/66942022-12-02T08:02:56Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
A new offset optimization method for signalized urban road networks
Almasri, Essam
Offset optimization
genetic algorithm
cell transmission model
[no abstract]
2019-11-15T15:28:00Z
2019-11-15T15:28:00Z
2006
DoctoralThesis
Text
Almasri, Essam: A new offset optimization method for signalized urban road networks. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2006, 178 S.
https://www.repo.uni-hannover.de/handle/123456789/6694
http://dx.doi.org/10.15488/6642
eng
urn:nbn:de:gbv:089-5107909849
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/67692022-12-02T07:36:30Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Dynamische Simulation des Verkehrsablaufs unter Verwendung statischer Verflechtungsmatrizen
Kemper, Carsten
Verkehrssimulation
Verkehrsmanagement
Verkehrsnachfrage
[no abstract]
2019-11-18T08:03:45Z
2019-11-18T08:03:45Z
2006
DoctoralThesis
Text
Kemper, Carsten: Dynamische Simulation des Verkehrsablaufs unter Verwendung statischer Verflechtungsmatrizen. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2006, 227 S.
https://www.repo.uni-hannover.de/handle/123456789/6769
http://dx.doi.org/10.15488/6717
ger
urn:nbn:de:gbv:089-5168975861
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/69782022-12-02T07:50:31Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Einfluss dynamischer Navigation auf das Verkehrsgeschehen in städtischen Straßennetzen
Matschke, Irina
Navigation
Routenwahl
mikroskopische Simulation
[no abstract]
2019-11-18T17:56:16Z
2019-11-18T17:56:16Z
2007
DoctoralThesis
Text
Matschke, Irina: Einfluss dynamischer Navigation auf das Verkehrsgeschehen in städtischen Straßennetzen. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2007, 217 S.
https://www.repo.uni-hannover.de/handle/123456789/6978
http://dx.doi.org/10.15488/6925
ger
urn:nbn:de:gbv:089-5293038416
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/72082022-12-02T07:50:31Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Optimierung der Quelle-Ziel-Matrixschätzung hinsichtlich Redundanzstörung sich verändernder Verkehrszustände
Wang, Yun-Pang
Matrixschätzung
redundante Information
Verkehrsumlegung
[no abstract]
2019-11-20T06:58:56Z
2019-11-20T06:58:56Z
2008
DoctoralThesis
Text
Wang, Yun-Pang: Optimierung der Quelle-Ziel-Matrixschätzung hinsichtlich Redundanzstörung sich verändernder Verkehrszustände. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2008, 143 S.
https://www.repo.uni-hannover.de/handle/123456789/7208
http://dx.doi.org/10.15488/7155
ger
urn:nbn:de:gbv:089-5583404821
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/72542022-12-02T07:32:52Zcom_123456789_1com_123456789_2961col_123456789_2col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Grundlagen einer nationalen Seehafenkonzeption : Untersuchung am Beispiel des Containerverkehrs
Feldt, Walter
seaports
sustainable development
Seehäfen
nachhaltige Entwicklung
[no abstract]
2019-11-21T11:12:36Z
2019-11-21T11:12:36Z
2009
DoctoralThesis
Text
Feldt, Walter: Grundlagen einer nationalen Seehafenkonzeption : Untersuchung am Beispiel des Containerverkehrs. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2009, 275 S.
https://www.repo.uni-hannover.de/handle/123456789/7254
http://dx.doi.org/10.15488/7201
ger
urn:nbn:de:gbv:089-6120575771
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/72962022-12-02T07:32:52Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Messung und Analyse an verkehrstelematischen Systemen am Beispiel Floating Car Data
Lampl, Dieter C.
Messung und Analyse
Verkehrstelematik
virtuelle Realität
[no abstract]
2019-11-21T12:07:39Z
2019-11-21T12:07:39Z
2009
DoctoralThesis
Text
Lampl, Dieter C.: Messung und Analyse an verkehrstelematischen Systemen am Beispiel Floating Car Data. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2009, 163 S.
https://www.repo.uni-hannover.de/handle/123456789/7296
http://dx.doi.org/10.15488/7243
ger
urn:nbn:de:gbv:089-5914983834
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/78102022-12-02T07:54:05Zcom_123456789_1com_123456789_2961col_123456789_3col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Betriebliche Maßnahmen zur Optimierung der Leistungsfähigkeit der Bahnstrecken und zur Erhöhung der Reisegeschwindigkeit des Personenverkehrs in China
Shi, Lei
Railway operations
performance
cruising speed
Eisenbahnbetrieb
Leistungsfähigkeit
Reisegeschwindigkeit
[no abstract]
2019-11-29T09:52:35Z
2019-11-29T09:52:35Z
2011
DoctoralThesis
Text
Shi, Lei: Betriebliche Maßnahmen zur Optimierung der Leistungsfähigkeit der Bahnstrecken und zur Erhöhung der Reisegeschwindigkeit des Personenverkehrs in China. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2011, 237 S.
https://www.repo.uni-hannover.de/handle/123456789/7810
http://dx.doi.org/10.15488/7757
ger
urn:nbn:de:gbv:089-6802197149
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/80672022-12-02T07:59:27Zcom_123456789_1com_123456789_2961col_123456789_9col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
"Das Commerz muß nicht alle Ordnung umstossen wollen" : das Verhältnis von Politik und Handel in Lüneburg und Hann. Münden im 18. Jahrhundert
Becker, Theresa
Politics of trade
trade organisation
social and normative order
Handelspolitik
Handelsorganisation
gesellschaftliche und normative Ordnung
[no abstract]
2019-12-02T16:57:16Z
2019-12-02T16:57:16Z
2013
DoctoralThesis
Text
Becker, Theresa: "Das Commerz muß nicht alle Ordnung umstossen wollen" : das Verhältnis von Politik und Handel in Lüneburg und Hann. Münden im 18. Jahrhundert. Hannover : Gottfried Wilhelm Leibniz Universität Hannover, Diss., 2013, 324 S.
https://www.repo.uni-hannover.de/handle/123456789/8067
http://dx.doi.org/10.15488/8014
ger
urn:nbn:de:gbv:089-76704598X7
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/81462022-12-02T07:47:03Zcom_123456789_1com_123456789_2961col_123456789_9col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
Das kurhannoversche Postpersonal 1736-1803 : ein Beitrag zur Geschichte der sozialen Organisation von Herrschaft, Kommunikation und Verkehr im 18. Jahrhundert
Höper, Lutz
Electorate of Hanover
post staff
sociogenesis
Kurfürstentum Hannover
Postpersonal
Soziogenese
[no abstract]
2019-12-03T06:24:36Z
2019-12-03T06:24:36Z
2013
DoctoralThesis
Text
Höper, Lutz: Das kurhannoversche Postpersonal 1736-1803 : ein Beitrag zur Geschichte der sozialen Organisation von Herrschaft, Kommunikation und Verkehr im 18. Jahrhundert. Hannover : Gottfried Wilhelm Leibniz Universität Hannover, Diss, 2013, 765 S.
https://www.repo.uni-hannover.de/handle/123456789/8146
http://dx.doi.org/10.15488/8093
ger
urn:nbn:de:gbv:089-7447459500
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/85532022-12-02T08:05:51Zcom_123456789_1com_123456789_2961col_123456789_4col_123456789_2962doc-type:Textopen_accessstatus-type:publishedVersionddc:380doc-type:DoctoralThesis
High performance conflict detection and resolution for multi-dimensional objects
Kuenz, Alexander
Conflict detection and resolution
4D-trajectory-based operations
n-dimensional bisection
Konflikterkennenung und -lösung
4D-trajektorienbasierte Konzepte
N-dimensionale Bisektion
[no abstract]
2019-12-07T16:33:14Z
2019-12-07T16:33:14Z
2015
DoctoralThesis
Text
Kuenz, Alexander: High performance conflict detection and resolution for multi-dimensional objects. Hannover : Gottfried Wilhelm Leibniz Universität Hannover, Diss., 2015, 236 S.
https://www.repo.uni-hannover.de/handle/123456789/8553
http://dx.doi.org/10.15488/8500
eng
urn:nbn:de:gbv:089-8372383745
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Gottfried Wilhelm Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/99032022-12-02T15:03:41Zcom_123456789_1col_123456789_3ddc:550doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Scour development around a jacket structure in combined waves and current conditions compared to monopile foundations
Welzel, M.
Schendel, A.
Hildebrandt, A.
Schlurmann, T.
Hydrodynamic transparent
Jacket
Laboratory tests
Scour
Sediment transport
Wave-current interaction
Offshore oil well production
Piles
Sediment transport
Software testing
Combined wave current
Jacket
Laboratory test
Local scour depths
Offshore foundation
Physical model test
Wave current interaction
Waves and currents
Scour
This paper presents the results of an experimental study on the scour development of a hydraulic-transparent offshore foundation exposed to combined waves and current. Irregular waves propagating perpendicular to a current were simulated in a wave-current basin. The physical model tests were conducted in a length scale of 1:30 while measurements of the scour development over time were achieved by echo sounding devices placed at several locations at the upstream and downstream side of the jacket structure. Insights were gained on the scour development and time scale of the scouring process around a complex jacket structure for different wave-current conditions. The results were presented with respect to the Keulegan-Carpenter KC number and the relative wave-current velocity. Wave conditions were adjusted so that KC numbers between 6.7 and 23.4 could be tested in a systematic wave-current test program with tests reaching from wave dominated conditions up to current dominated conditions. Measured scour depths were critically assessed by an extrapolation to expected equilibrium scour depths. With respect to the current flow direction, the experiments showed generally larger scour depths at the upstream side and lower scour depths on the downstream side for each pile of the jacket structure. The development of global scour around the structure intensified with increasing relative wave-current velocity. As a result, a practical formulation is proposed for the reliable prediction of local scour depths around a jacket foundation in combined wave-current conditions. Finally, dimensionless time scales and observed as well as predicted scour depths are compared to values for the scour development around monopiles.
2020-05-25T08:12:44Z
2020-05-25T08:12:44Z
2019
Article
Text
Welzel, M.; Schendel, A.; Hildebrandt, A.; Schlurmann, T.: Scour development around a jacket structure in combined waves and current conditions compared to monopile foundations. In: Coastal Engineering 152 (2019), 103515. DOI: https://doi.org/10.1016/j.coastaleng.2019.103515
https://www.repo.uni-hannover.de/handle/123456789/9903
http://dx.doi.org/10.15488/9846
eng
Coastal Engineering 152 (2019)
0378-3839
https://doi.org/10.1016/j.coastaleng.2019.103515
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
Amsterdam : Elsevier B.V.
oai:www.repo.uni-hannover.de:123456789/101542022-12-02T07:59:27Zcom_123456789_1com_123456789_2961col_123456789_10col_123456789_2962ddc:650doc-type:Textopen_accessddc:330status-type:publishedVersionddc:380doc-type:DoctoralThesis
Contributions to sustainable urban transport : decision support for alternative mobility and logistics concepts
Sonneberg, Marc-Oliver
Breitner, Michael H.
Sester, Monika
Information Systems Research
Decision Support
Acceptance Research
Urban Transport
Urban Mobility
Urban Logistics
Sustainability
Wirtschaftsinformatikforschung
Entscheidungsunterstützung
Operations Research
Akzeptanzforschung
Urbaner Transport
Urbane Mobilität
Urbane Logistik
Nachhaltigkeit
Increasing transport activities in cities are a substantial driver for congestion and pollution, influencing urban populations’ health and quality of life. These effects are consequences of ongoing urbanization in combination with rising individual demand for mobility, goods, and services. With the goal of increased environmental sustainability in urban areas, city authorities and politics aim for reduced traffic and minimized transport emissions.
To support more efficient and sustainable urban transport, this cumulative dissertation focuses on alternative transport concepts. For this purpose, scientific methods and models of the interdisciplinary information systems domain combined with elements of operations research, transportation, and logistics are developed and investigated in multiple research contributions. Different transport concepts are examined in terms of optimization and acceptance to provide decision support for relevant stakeholders. In more detail, the overarching topic of urban transport in this dissertation is divided into the complexes urban mobility (part A) in terms of passenger transport and urban logistics (part B) with a focus on the delivery of goods and services. Within part A, approaches to carsharing optimization are presented at various planning levels. Furthermore, the user acceptance of ridepooling is investigated. Part B outlines several optimization models for alternative urban parcel and e-grocery delivery concepts by proposing different network structures and transport vehicles. Conducted surveys on intentional use of urban logistics concepts give valuable hints to providers and decision makers.
The introduced approaches with their corresponding results provide target-oriented support to facilitate decision making based on quantitative data. Due to the continuous growth of urban transport, the relevance of decision support in this regard, but also the understanding of the key drivers for people to use certain services will further increase in the future. By providing decision support for urban mobility as well as urban logistics concepts, this dissertation contributes to enhanced economic, social, and environmental sustainability in urban areas.
2020-10-14T09:55:50Z
2020-10-14T09:55:50Z
2020
DoctoralThesis
Text
Sonneberg, Marc-Oliver: Contributions to sustainable urban transport : decision support for alternative mobility and logistics concepts. Hannover : Gottfried Wilhelm Leibniz Universität, Diss., 2020, XXIV, 201 S. DOI: https://doi.org/10.15488/10091
https://www.repo.uni-hannover.de/handle/123456789/10154
http://dx.doi.org/10.15488/10091
eng
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
oai:www.repo.uni-hannover.de:123456789/109792022-12-02T15:03:41Zcom_123456789_1col_123456789_4doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Managing Connected Automated Vehicles in Mixed Traffic Considering Communication Reliability : A Platooning Strategy
Yao, Shengyue
Shet, Rahi Avinash
Friedrich, Bernhard
Codina, Esteve
Soriguera, Francesc
Montero, Lídia
Estrada, Miquel
Linares, MªPaz
automated vehicle management
platooning
V2X communication
Managing connected and automated vehicles (CAV) in mixed traffic scenario necessitates special attention when introducing them into the market. The coexistence of CAVs and non-CAVs leads to complex interactions. To simplify the interactions in the envisioned scenario, a strategy that operates CAVs in a platoon which is led by a CAV driven by a human is proposed in this paper. Implementing this strategy in practice requires feasible platooning approaches of assigning CAV roles in platoons (i.e. to be a leader or a follower) and reliable communication between CAVs and roadside units (RSU). Two rudimentary rule-based approaches are designed in this paper and examined in a micro-simulation. All CAVs are assumed to be V2X enabled. CAVs start communicating with each other and RSU when they enter the CAV zone. The RSU require CAVs to follow a certain platooning approach and CAVs cooperate with each other to form platoons. The impacts of different platooning approaches and communication reliability level are evaluated by total travel time and the automated driving mode duration. © 2020 The Authors. Published by Elsevier B.V.
2021-05-07T05:59:15Z
2021-05-07T05:59:15Z
2020
Article
Text
Yao, S.; Shet, R.A.; Friedrich, B.: Managing Connected Automated Vehicles in Mixed Traffic Considering Communication Reliability : A Platooning Strategy. In: Transportation Research Procedia 47 (2020), S. 43-50. DOI: https://doi.org/10.1016/j.trpro.2020.03.071
https://www.repo.uni-hannover.de/handle/123456789/10979
http://dx.doi.org/10.15488/10897
eng
Transportation Research Procedia 47 (2020)
2352-1465
https://doi.org/10.1016/j.trpro.2020.03.071
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/109802022-12-02T16:17:37Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Development of an Agent-Based Transport Model for the City of Hanover Using Empirical Mobility Data and Data Fusion
Bienzeisler, Lasse
Lelke, Torben
Wage, Oskar
Thiel, Falco
Friedrich, Bernhard
Codina, Esteve
Soriguera, Francesc
Montero, Lídia
Estrada, Miquel
Linares, MªPaz
MATSim
Scenario Generation
Geo-spatial data
The model presented in this work is based on the agent-based simulation framework MATSim. We describe a new approach for collecting and processing the underlying data required for the development of a MATSim scenario. In cooperation with the administration of Hanover, available data was centrally collected, analysed and clustered. Using data fusion, the dataset was combined and enriched with additional information from open data sources in order to improve the model's level of detail. In combination with the German mobility survey Mobilität in Deutschland 2017, the developed model is specifically adapted for the regional characteristics of Hanover, but yet transferable to other scenarios. © 2020 The Authors. Published by Elsevier B.V.
2021-05-07T05:59:15Z
2021-05-07T05:59:15Z
2020
Article
Text
Bienzeisler, L.; Lelke, T.; Wage, O.; Thiel, F.; Friedrich, B.: Development of an Agent-Based Transport Model for the City of Hanover Using Empirical Mobility Data and Data Fusion. In: Transportation Research Procedia 47 (2020), S. 99-106. DOI: https://doi.org/10.1016/j.trpro.2020.03.073
https://www.repo.uni-hannover.de/handle/123456789/10980
http://dx.doi.org/10.15488/10898
eng
Transportation Research Procedia 47 (2020)
2352-1465
https://doi.org/10.1016/j.trpro.2020.03.073
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/109812022-12-02T16:17:36Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Learning a Precipitation Indicator from Traffic Speed Variation Patterns
Feng, Yu
Brenner, Claus
Sester, Monika
machine learning
traffic speed variation
precipitation events detection
gradient boosting
It is common sense that traffic participants tend to drive slower under rain or snow conditions, which has been confirmed by many studies in the field of transportation research. When analyzing the relation between precipitation events and traffic speed observations, it was shown that by using extra weather information, road speed prediction models can be improved. Conversely, traffic speed variation patterns of multiple roads may also provide an indirect indication of weather conditions. In this paper, we attempt to learn such a model, which can detect the appearance of precipitation events, using only road speed observations, for the case of New York City. With a seasonal trend decomposition model Prophet, residuals between the observations and the model were used as features to represent the level of anomaly as compared to the normal traffic situation. Based on the timestamps of weather records on sunny days versus rainy or snowy days, features were extracted from traffic data and assigned to the corresponding labels. A binary classifier was then trained on six-month training data and achieved an accuracy of 91.74% when tested on the remaining two-month test data. We show that there is a significant correlation between the precipitation events and speed variation patterns of multiple roads, which can be used to train a binary indicator. This indicator can detect those precipitation events, which have a significant influence on the city traffic. The method has also a great potential to improve the emergency response of cities where massive real-time traffic speed observations are available. © 2020 The Authors. Published by Elsevier B.V.
2021-05-07T05:59:15Z
2021-05-07T05:59:15Z
2020
Article
Text
Feng, Y.; Brenner, C.; Sester, M.: Learning a Precipitation Indicator from Traffic Speed Variation Patterns. In: Transportation Research Procedia 47 (2020), S. 203-210. DOI: https://doi.org/10.1016/j.trpro.2020.03.090
https://www.repo.uni-hannover.de/handle/123456789/10981
http://dx.doi.org/10.15488/10899
eng
Transportation Research Procedia 47 (2020)
2352-1465
https://doi.org/10.1016/j.trpro.2020.03.090
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/123642022-12-02T16:16:27Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:320ddc:380
The complex triad of congruence issues in influencer marketing
Mettenheim, Walter von
Wiedmann, Klaus-Peter
Finding a fitting endorser has proven to be one of the most delicate and critical tasks of influencer marketing. This research explores the relevance of the congruency of the influencer personality with (1) brand personality and consumers' (2) actual/(3) ideal selves. Additionally, the (4) moderating role of involvement is considered, the impacts on post attitude/belief, brand trust and purchase intention are thereby studied. The novelty of this study lies in the integral examination of the types of congruencies and involvement in the context of influencer marketing as well as the consideration of their impact on the brand-related variables. Based on an online survey with 547 participants analyzed by means of structural equation modeling in SmartPLS, partly counterintuitive findings were produced. When the involvement level rises, congruence with consumers' actual selves becomes more important. Under low-involvement conditions, practitioners should pay more attention to influencers' fit with consumers' ideal selves. An adequate fit between brand and endorser is paramount and becomes even more important under high-involvement conditions. Overall, this study reveals that the three types of congruency and involvement interact in a very unique way in the context of influencer marketing. © 2021 The Authors. Journal of Consumer Behaviour published by John Wiley & Sons Ltd.
2022-06-16T04:33:24Z
2022-06-16T04:33:24Z
2021
Article
Text
Mettenheim, W. von; Wiedmann, K.-P.: The complex triad of congruence issues in influencer marketing. In: Journal of Consumer Behaviour 20 (2021), Nr. 5, S. 1277-1296. DOI: https://doi.org/10.1002/cb.1935
https://www.repo.uni-hannover.de/handle/123456789/12364
http://dx.doi.org/10.15488/12266
eng
Journal of Consumer Behaviour 20 (2021), Nr. 5
1479-1838
https://doi.org/10.1002/cb.1935
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Chichester : Wiley
oai:www.repo.uni-hannover.de:123456789/123992022-12-02T15:09:32Zcom_123456789_1col_123456789_7doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Robust flight planning impact assessment considering convective phenomena
García-Heras, Javier
Soler, Manuel
González-Arribas, Daniel
Eschbacher, Kurt
Rokitansky, Carl-Herbert
Sacher, Daniel
Gelhardt, Ulrike
Lang, Jürgen
Hauf, Thomas
Simarro, Juan
Valenzuela, Alfonso
Franco, Antonio
Rivas, Damián
Convective weather
Robust flight-planning
Simulation
Planning
Thunderstorms
Vehicle actuated signals
Air Traffic Management
Air traffic simulators
Ensemble prediction systems
Impact assessments
Objective functions
Open loop optimal control
Path-finding algorithms
Simulation process
Air traffic control
air traffic
algorithm
assessment method
computer simulation
numerical model
traffic management
transportation planning
Thunderstorms are one of the leading causes of Air Traffic Management delays. In this paper, we assess how incorporating convective information into flight planning algorithms can lead to reductions in reroutings due to storm encounters during the execution of the flight. We use robust open-loop optimal control methodology at the flight planning level and incorporate meteorological uncertainties based on Ensemble Prediction System forecasts. Convective risk areas can be derived from the latter to be included in the objective function. At the execution level, the planned trajectories are included in an air traffic simulator (NAVSIM) under observed weather (wind and storms). In this simulation process, track modifications might be triggered in case of encountering an observed thunderstorm. A tool termed DIVMET based on pathfinding algorithms has been integrated into NAVSIM is considered to that end. Results show that planning robust trajectories (avoiding thus convective areas) reduces the number of storms encounters and increases predictability. This increase in predictability is at a cost in terms of fuel and time, also quantified. © 2021 Elsevier Ltd
2022-06-21T05:47:17Z
2022-06-21T05:47:17Z
2021
Article
Text
García-Heras, J.; Soler, M.; González-Arribas, D.; Eschbacher, K.; Rokitansky, C.-H. et al.: Robust flight planning impact assessment considering convective phenomena. In: Transportation Research Part C: Emerging Technologies 123 (2021), 102968. DOI: https://doi.org/10.1016/j.trc.2021.102968
https://www.repo.uni-hannover.de/handle/123456789/12399
http://dx.doi.org/10.15488/12301
eng
Transportation Research Part C: Emerging Technologies 123 (2021)
1879-2359
https://doi.org/10.1016/j.trc.2021.102968
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/124862022-12-02T16:16:27Zcom_123456789_1col_123456789_10ddc:550doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Using a two-step framework for the investigation of storm impacted beach/dune erosion
Dissanayake, Pushpa
Brown, Jennifer
Sibbertsen, Philipp
Winter, Christian
Beach/dune erosion
Classification of storm events
Coastal hazard
Formby point
Inter-storm recovery
Numerical modelling
Sefton coast
Statistical analysis
XBeach
Beaches
Coastal engineering
Erosion
Offshore oil well production
Water levels
Beach morphologies
Coastal management
Critical condition
Near-shore waters
Response functions
Significant wave height
Storm classification
Storm erosion
Storms
beach erosion
classification
coastal zone management
dune
hazard management
numerical model
statistical analysis
storm
structural response
England
Sefton
United Kingdom
Long-term coastal management of beach/dune systems requires the definition and assessment of storm events. This study presents a framework using statistical analyses and numerical modelling (XBeach) to characterize storm events and investigate their impact on beach/dune erosion. The method is developed using exemplary data from Formby Point on the Sefton coast (UK), which has a complex beach morphology and frontal dunes. Relevant storm events are classified by a versatile univariate response function taking into account both nearshore water levels and offshore significant wave heights (Hs). It is shown that compared to the established storm classification (Hs ≥ 2.5 m) 35% more storm events that are relevant for beach/dune erosion are identified. Also the events exceed critical conditions for longer durations, and cause greater erosion impact (12%) along the beach/dune profile. The proposed classification of storm events thus captures relevant events for the storm erosion and can inform coastal management strategies. This framework is widely applicable to other beach/dune systems. © 2021 The Authors
2022-07-04T05:03:54Z
2022-07-04T05:03:54Z
2021
Article
Text
Dissanayake, P.; Brown, J.; Sibbertsen, P.; Winter, C.: Using a two-step framework for the investigation of storm impacted beach/dune erosion. In: Coastal Engineering 168 (2021), 103939. DOI: https://doi.org/10.1016/j.coastaleng.2021.103939
https://www.repo.uni-hannover.de/handle/123456789/12486
http://dx.doi.org/10.15488/12387
eng
Coastal Engineering 168 (2021)
1872-7379
https://doi.org/10.1016/j.coastaleng.2021.103939
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier Science
oai:www.repo.uni-hannover.de:123456789/125292022-12-02T15:02:18Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Performance evaluation of GNSS receiver clock modelling in urban navigation using geodetic and high-sensitivity receivers
Jain, Ankit
Schön, Steffen
Car navigation
clocks
GNSS
high accuracy
accuracy assessment
car use
geodetic network
GNSS
navigation
performance assessment
urban transport
In urban areas, the Global Navigation Satellite System (GNSS) can lead to position errors of tens of meters due to signal obstruction and severe multipath effects. In cases of 3D-positioning, the vertical coordinate is estimated less accurately than are the horizontal coordinates. Multisensor systems can enhance navigation performance in terms of accuracy, availability, continuity and integrity. However, the addition of multiple sensors increases the system cost, and thereby the applicability to low-cost applications is limited. By using the concept of receiver clock modelling (RCM), the position estimation can be made more robust; the use of high-sensitivity (HS) GNSS receivers can improve the system availability and continuity. This paper investigates the integration of a low-cost HS GNSS receiver with an external clock in urban conditions; subsequently, the gain in the navigation performance is evaluated. GNSS kinematic data is recorded in an urban environment with multiple geodetic-grade and HS receivers. The external clock stability information is incorporated through the process noise matrix in a Kalman filter when estimating the position, velocity and time states. Results shows that the improvement in the precision of the height component and vertical velocity with both receivers is about 70% with RCM compared with the estimates obtained without applying RCM. Pertaining accuracy, the improvement in height with RCM is found to be about 70% and 50% with geodetic and HS receivers, respectively. In terms of availability, the HS receiver delivers an 100% output compared with a geodetic receiver, which provides an output 99⋅4% of the total experiment duration. Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Royal Institute of Navigation..
2022-07-07T08:09:55Z
2022-07-07T08:09:55Z
2021
Article
Text
Jain, A.; Schön, S.: Performance evaluation of GNSS receiver clock modelling in urban navigation using geodetic and high-sensitivity receivers. In: Journal of Navigation 74 (2021), Nr. 6, S. 1397-1415. DOI: https://doi.org/10.1017/S0373463321000710
https://www.repo.uni-hannover.de/handle/123456789/12529
http://dx.doi.org/10.15488/12430
eng
Journal of Navigation 74 (2021), Nr. 6
1469-7785
https://doi.org/10.1017/S0373463321000710
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
Cambridge : Cambridge Univ. Press
oai:www.repo.uni-hannover.de:123456789/127702022-12-02T16:19:28Zcom_123456789_1col_123456789_2status-type:acceptedVersiondoc-type:BookPartdoc-type:Textopen_accessddc:380
Entwicklungslinien und Perspektiven der New Urban Tourism-Forschung
Sommer, Christoph
Stoltenberg, Luise
Frisch, Thomas
Stors, Natalie
Freytag, Tim
Kagermeier, Andreas
Tourismus
Städtetourismus
New Urban Tourism
Stadttourismus und städtischer Alltag prägen einander vielfältig, bisweilen auf regelrecht konstitutive Art und Weise. Es scheint offensichtlich, dass Tourismus im Alltag einer Stadtbevölkerung in vielerlei Form präsent werden kann. Gleichwohl hält sich die tradierte Vorstellung von Stadt als Destination, welche einerseits von Bewohner*innen bewohnt und andererseits von Besucher*innen besucht wird. Daher gilt es nach wie vor zu versuchen, (Stadt-)Tourismus weniger isoliert und stärker als integriertes Momentum des Städtischen zu denken. Der vorliegende Beitrag widmet sich dieser engen Verflechtung von Stadt und Tourismus und zielt darauf, ihre vielfältigen Wechselwirkungen analytisch zu fassen. Dazu werden zunächst vier empirische Beobachtungen aufgespannt, die den Kontext der New Urban Tourism-Forschung thesenartig illustrieren. Daran anschließend erfolgt ein Abriss konzeptioneller Anknüpfungspunkte, welche die New Urban Tourism-Forschung informieren. Diese theoretischen Bezüge bilden gleichzeitig die Grundlage für die folgenden drei analytischen Dimensionen, die wir als Vorschläge zur Systematisierung der Forschungsstrecke verstehen: (1) Faszination für das Alltägliche, (2) Begegnungen und Erschließung neuer Orte des Zusammentreffens und (3) Ko-Produktion des Städtischen. Der Beitrag schließt mit einer kritischen Reflexion der Grenzen der aktuellen New Urban Tourism-Forschung sowie mit einigen Überlegungen zu zukünftigen Arbeitsfeldern.
2022-08-19T07:24:37Z
2022-08-19T07:24:37Z
2019
BookPart
Text
Sommer, C.; Stoltenberg, L.; Frisch, T.; Stors, N.: Entwicklungslinien und Perspektiven der New Urban Tourism-Forschung. In: Freytag, T.; Kagermeier, A. (Hrsg.): Touristifizierung urbaner Räume. Mannheim : MetaGIS Fachbuch, 2019 (Studien zur Freizeit und Tourismusforschung ; 15), S. 15-32
https://www.repo.uni-hannover.de/handle/123456789/12770
http://dx.doi.org/10.15488/12670
ger
Touristifizierung urbaner Räume
Studien zur Freizeit und Tourismusforschung;15
978-3-947475-16-2
1869-7909
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Mannheim : MetaGIS Fachbuch
oai:www.repo.uni-hannover.de:123456789/130822022-12-02T16:16:28Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessddc:330status-type:publishedVersionddc:380
The Effect of Renting in Cropland on Livelihood Choices and Agricultural Commercialization: A Case Study from Rural Vietnam
Schulte, Oliver
Nguyen, Trung Thanh
Grote, Ulrike
Commercialization
Control function
Double-Hurdle
Land markets
Livelihoods
This paper investigates the role of land rental markets in livelihood choices using data from 792 farming households in rural Vietnam. First, we cluster households according to livelihood strategies and estimate the determinants of the respective decision. In a second step, we analyze the contribution of rented land in linking smallholders to output markets. Our results suggest that rented land can provide smallholders with an opportunity to increase their agricultural activities and avoid resorting to less remunerative activities such as agricultural wage labor. Moreover, rented crop area increases the probability of market participation as well as the quantity of sales. Our results point to the need for a further liberalization of land rental markets specifically targeted at households that have been excluded from more remunerative livelihood strategies previously. Supporting these households to have access to the assets required to cultivate the additional area is thus recommended. © 2022, The Author(s).
2022-11-09T05:42:27Z
2022-11-09T05:42:27Z
2022
Article
Text
Schulte, O.; Nguyen, T.T.; Grote, U.: The Effect of Renting in Cropland on Livelihood Choices and Agricultural Commercialization: A Case Study from Rural Vietnam. In: The European journal of development research 34 (2022), S. 2878-2898. DOI: https://doi.org/10.1057/s41287-021-00496-9
https://www.repo.uni-hannover.de/handle/123456789/13082
http://dx.doi.org/10.15488/12978
eng
The European journal of development research (2022), online first
1743-9728
https://doi.org/10.1057/s41287-021-00496-9
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
[S.l.] : Palgrave Macmillan
oai:www.repo.uni-hannover.de:123456789/136422023-04-12T01:00:16Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Can travel time variability be ignored when solving the transit network design problem?
Haas, Inbal
Friedrich, Bernhard
Genetic Algorithm
Traffic assignment
Transit Network Design
Konferenzschrift
[no abstract available]
2023-04-11T07:18:41Z
2023-04-11T07:18:41Z
2019
Article
Text
Haas, I.; Friedrich, B.: Can travel time variability be ignored when solving the transit network design problem?. In: Transportation Research Procedia 41 (2019), S. 67-69. DOI: https://doi.org/10.1016/j.trpro.2019.09.014
https://www.repo.uni-hannover.de/handle/123456789/13642
http://dx.doi.org/10.15488/13532
eng
Transportation Research Procedia 41 (2019)
2352-1465
https://doi.org/10.1016/j.trpro.2019.09.014
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/137312023-05-11T01:00:13Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Nudging travellers to societally favourable routes: The impact of visual communication and emotional responses on decision making
Fuest, Stefan
Sester, Monika
Griffin, Amy L.
Map symbolisation
Visual variables
Emotions
Route choice
Traffic
Air quality
As urbanisation increases, in many places, the transport system is suffering from problems that may affect large parts of the urban population, such as traffic congestion or increased air pollution. In both cases, a better distribution of traffic flows could contribute to establishing a more sustainable transport system, and to improve the situation from a societal point of view. In this paper, we use cartographic symbolisation for communicating favourability of route options for achieving a societal benefit. Since map symbols can evoke different emotional responses in the viewer, we investigate to which extent map symbols evoke positive and negative emotions and whether these influence route choice decision making. We created different cartographic visualisations and designed a user study that investigates the effectiveness and suitability of these different visualisation variants for influencing route choice based on two scenarios: traffic and air quality. Fourteen route maps were prepared using different map symbols to symbolise societally favourable and non-favourable route options. The results of this study show that map symbols can be used effectively for influencing route choice towards choosing the favourable route for the two tested scenarios. While visualisations that modify only lines were more effective in the traffic scenario, area symbol modifications were more effective for the air quality scenario. The symbolisation evoked a wide range of emotions in participants. While non-favourable routes mainly evoke negative emotions (particularly fear), favourable routes mainly evoked positive emotions (particularly contentment) or no emotions. The results further demonstrate that for some of the visualisation variants, emotions felt in response to the map visualisations contributed significantly to changing the route choice decisions in favour of the societally favourable route option. The findings of this research demonstrate the relationship between route choice behaviour and emotional responses elicited by map symbols.
2023-05-10T12:01:34Z
2023-05-10T12:01:34Z
2023
Article
Text
Fuest, S.; Sester, M.; Griffin, A.L.: Nudging travellers to societally favourable routes: The impact of visual communication and emotional responses on decision making. In: Transportation research interdisciplinary perspectives 19 (2023), 100829. DOI: https://doi.org/10.1016/j.trip.2023.100829
https://www.repo.uni-hannover.de/handle/123456789/13731
http://dx.doi.org/10.15488/13621
eng
Transportation research interdisciplinary perspectives 19 (2023)
2590-1982
https://doi.org/10.1016/j.trip.2023.100829
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam : Elsevier Ltd.
oai:www.repo.uni-hannover.de:123456789/140552023-06-27T01:00:10Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Gamification and sensory stimuli in eco-driving research: A field experiment to reduce energy consumption in electric vehicles
Degirmenci, Kenan
Breitner, Michael H.
Eco-driving
Electric vehicles
Field experiment
Gamification
Mobile application
Sensory stimuli
Gamification can create meaningful engagement for users and foster desired behaviors. In gamification research, however, the importance of sensory stimuli often has been overlooked. We examine and discuss how the variation of visual and auditory stimuli in gamified driving influences users’ eco-driving behavior. We conducted a field experiment where eco-driving is the field of application and energy consumption the dependent variable. Participants performed test drives with a battery electric car whilst using a mobile application that supports participants to drive more eco-friendly. We varied the extent to which the application employs visual and auditory stimuli. Our results of an analysis of covariance (ANCOVA) and multivariate analysis of variance (MANOVA) show that, depending on the stimuli configuration, participants expose different levels of energy consumption and experience different levels of enjoyment as well as different intentions to actually use this mobile application. More specifically, through the ANCOVA, we find significant differences of the energy consumption between the control group, who drove without the gamified application, and the visual-auditory group, as well as between the visual-only and the visual-auditory group, both at a p-value of 0.02. Further, the MANOVA reveals significant differences between the visual-only and visual-auditory group at a p-value of 0.01 for both perceived enjoyment and intention to use. Due to the significant impact of the varied sensory stimuli on the outcomes, we conclude that the choice and design of sensory stimuli play an increasingly important role in real-time gamification in safety critical situations.
2023-06-26T11:42:47Z
2023-06-26T11:42:47Z
2022
Article
Text
Degirmenci, K.; Breitner, M.H.: Gamification and sensory stimuli in eco-driving research: A field experiment to reduce energy consumption in electric vehicles. In: Transportation Research Part F: Traffic Psychology and Behaviour 92 (2023), S. 266-282. DOI: https://doi.org/10.1016/j.trf.2022.10.014
https://www.repo.uni-hannover.de/handle/123456789/14055
http://dx.doi.org/10.15488/13941
eng
Transportation Research Part F: Traffic Psychology and Behaviour 92 (2023)
1873-5517
1369-8478
https://doi.org/10.1016/j.trf.2022.10.014
https://creativecommons.org/licenses/by/4.0
CC BY 4.0 Unported
Amsterdam [u.a.] : Elsevier Science
oai:www.repo.uni-hannover.de:123456789/142512023-07-14T01:00:15Zcom_123456789_11col_123456789_12ddc:550doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Comparison of dynamic cobble berm revetments with differing gravel characteristics
Foss, Ollie
Blenkinsopp, Chris E.
Bayle, Paul M.
Martins, Kévin
Schimmels, Stefan
Almeida, Luis Pedro
Coastal adaption
Dynamic cobble berm revetment
Dynamic revetment
DynaRev
Gravel characteristics
Nature based solutions
Pressure on the coastline is escalating due to the impacts of climate change, this is leading to a rise in sea-levels and intensifying storminess. Consequently, many regions of the coast are at increased risk of erosion and flooding. Therefore coastal protection schemes will increase in cost and scale. In response there is a growing use of nature-based coastal protection which aim to be sustainable, effective and adaptable. An example of a nature-based solution is a dynamic cobble berm revetment: a berm constructed from cobble and other gravel sediments at the high tide wave runup limit. These structures limit wave excursion protecting the hinterland from inundation, stabilise the upper beach and adapt to changes in water level. Recent experiments and field applications have shown the suitability of these structures for coastal protection, however many of the processes and design considerations are poorly understood. This study directly compares two prototype scale laboratory experiments which tested dynamic cobble berm revetments constructed with approximately the same geometry but differing gravel characteristics; well-sorted rounded gravel (DynaRev1) and poorly-sorted angular gravel (DynaRev2). In both cases the structures were tested using identical wave forcing including incrementally increasing water level and erosive wave conditions. The results presented in this paper demonstrate that both designs responded to changing water level and wave conditions by approaching a dynamically stable state, where individual gravel is mobilised under wave action but the geometry remains approximately constant. Further, both structures acted to reduce swash excursions compared to a pure sand beach. However, their morphological behaviour is response to wave action varied considerably. Once overtopping of the designed crest occurred, the poorly-sorted revetment developed a peaked crest which grew in elevation as the water level or wave height increased, further limited overtopping. By comparison, the well-sorted revetment was characterised by a larger volume of submerged gravel and a lower elevation flat crest which responded less well to changes in conditions. This occurred due to two processes: (1) for the poorly-sorted case, gravel sorting processes moved small to medium gravel material (D50<70mm) to the crest and (2) the angular nature of the poorly-sorted gravel material promoted increased interlocking. Both of these processes led to a gravel matrix that is more resistant to wave action and gravitational effects. Both revetments experienced some sinking due to sand erosion beneath the front slope. The rate of sinking for the well-sorted case was larger and continued throughout due to the large pore spaces within the gravel matrix. For the poorly sorted revetment in DynaRev2, sand erosion ceased after approximately 28 h due to the development of a filter layer of small gravel at the sand-gravel interface reducing porosity at this location, hence a larger volume of sand was preserved beneath the structure. Both designs present a low-cost and effective solution for protecting sandy coastlines but from an engineering viewpoint it appears better to avoid well-sorted gravel material and greater gravel angularity has been seen to increase crest stability.
2023-07-13T07:10:41Z
2023-07-13T07:10:41Z
2023
Article
Text
Foss, O.; Blenkinsopp, C.E.; Bayle, P.M.; Martins, K.; Schimmels, S. et al.: Comparison of dynamic cobble berm revetments with differing gravel characteristics. In: Coastal Engineering 183 (2023), 104312. DOI: https://doi.org/10.1016/j.coastaleng.2023.104312
https://www.repo.uni-hannover.de/handle/123456789/14251
http://dx.doi.org/10.15488/14137
eng
Coastal Engineering 183 (2023)
1872-7379
0378-3839
https://doi.org/10.1016/j.coastaleng.2023.104312
https://creativecommons.org/licenses/by/4.0
CC BY 4.0 Unported
Amsterdam [u.a.] : Elsevier Science
oai:www.repo.uni-hannover.de:123456789/143282023-07-21T01:00:23Zcom_123456789_1com_123456789_15col_123456789_7col_123456789_18doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:620ddc:520ddc:380
A DC-Coupled, HBT-Based Transimpedance Amplifier for the LISA Quadrant Photoreceivers
Barranco, German Fernandez
Heinzel, Gerhard
Geodesy
gravitational waves
heterodyne laser interferometry
intersatellite metrology
photoreceiver
transimpedance amplifier (TIA)
[For abstract see PDF]
2023-07-20T10:57:09Z
2023-07-20T10:57:09Z
2021
Article
Text
Barranco, G.F.; Heinzel, G.: A DC-Coupled, HBT-Based Transimpedance Amplifier for the LISA Quadrant Photoreceivers. In: IEEE Transactions on Aerospace and Electronic Systems (T-AES) 57 (2021), Nr. 5, S. 2899-2904. DOI: https://doi.org/10.1109/taes.2021.3068437
https://www.repo.uni-hannover.de/handle/123456789/14328
http://dx.doi.org/10.15488/14214
eng
IEEE Transactions on Aerospace and Electronic Systems (T-AES) 57 (2021), Nr. 5
1557-9603
0018-9251
https://doi.org/10.1109/taes.2021.3068437
https://creativecommons.org/licenses/by-nc-nd/4.0
CC BY-NC-ND 4.0 Unported
New York, NY : IEEE
oai:www.repo.uni-hannover.de:123456789/147982023-09-02T01:00:39Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessddc:330status-type:publishedVersionddc:380
The impact of trade preferences removal: Evidence from the Belarus Generalized System of Preferences withdrawal
Gnutzmann, Hinnerk
Gnutzmann‐Mkrtchyan, Arevik
Belarus
generalized system of preferences
GSP
preference withdrawal
Under the Generalized System of Preferences (GSP), high-income countries grant unilateral trade preferences to developing countries. These preferences are subject to political conditionality, but little is known about the trade impact of loss of preferential access. We study the EU's complete withdrawal of GSP preferences from Belarus in 2007 in response to labour rights violations to fill this void. The withdrawal caused a significant drop in trade for affected products (25%–27% trade decline) and some trade reduction at the extensive margin. For products where trade was affected at the intensive margin, there is some evidence of adjustment through falls in quantities but also through prices for larger export sectors. The impact was uneven across sectors, with textiles and plastics particularly strongly affected by the withdrawal.
2023-09-01T06:38:32Z
2023-09-01T06:38:32Z
2022
Article
Text
Gnutzmann, H.; Gnutzmann-Mkrtchyan, A.: The impact of trade preferences removal: Evidence from the Belarus Generalized System of Preferences withdrawal. In: The World Economy 45 (2022), Nr. 9, S. 2977-3000. DOI: https://doi.org/10.1111/twec.13265
https://www.repo.uni-hannover.de/handle/123456789/14798
http://dx.doi.org/10.15488/14680
eng
The World Economy 45 (2022), Nr. 9
1467-9701
0378-5920
https://doi.org/10.1111/twec.13265
https://creativecommons.org/licenses/by/4.0
CC BY 4.0 Unported
Oxford [u.a.] : Wiley-Blackwell
oai:www.repo.uni-hannover.de:123456789/148932023-09-20T01:00:17Zcom_123456789_1col_123456789_8doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Assessment of the vitamin D status and its determinants in young healthy students from Palestine
Lenz, Janina Susann
Tintle, Nathan
Kerlikowsky, Felix
Badrasawi, Manal
Zahdeh, Rana
Qasrawi, Radwan
Hahn, Andreas
Schuchardt, Jan Philipp
Calcidiol
Middle East
Vitamin D deficiency
Vitamin D status predictors
The global prevalence of vitamin D deficiency is high. Poor vitamin D status, especially in women, has been reported in several countries in the Middle East despite adequate year-round sunlight for vitamin D synthesis. However, data on vitamin D status in Palestine are scarce. The aim of this cross-sectional study was to evaluate vitamin D status based on serum concentrations of 25-hydroxycholecalciferol [25-(OH)D] among young healthy Palestinian students (18–27 years) and to assess associations between 25-(OH)D concentrations and several predictors. The mean 25-(OH)D concentration of women (n 151) was 27⋅2 ± 14⋅5 nmol/l, with the majority having insufficient (31⋅1 %) or deficient (<60 %) 25-(OH)D status. Only 7 % of women achieved sufficient or optimal 25-(OH)D status. In contrast, men (n 52) had a mean 25-(OH)D concentration of 58⋅3 ± 14⋅5 nmol/l, with none classified as deficient, and most obtaining sufficient (55⋅8 %) or even optimal 25-(OH)D status (11⋅5 %). Among women, 98 % wore a hijab and 74 % regularly used sunscreen. Daily dietary vitamin D intake (3-d 24-h recalls) was 45⋅1 ± 36⋅1 IU in the total group (no sex differences). After adjustment, multiple linear regression models showed significant associations between 25-(OH)D concentrations and the use of supplements (B = 0⋅069; P = 0⋅020) and dietary vitamin D (B = 0⋅001; P = 0⋅028). In gender-stratified analysis, the association between supplement use and 25-(OH)D concentrations was significant in women (B = 0⋅076; P = 0⋅040). The vitamin D status of women in the present cohort is critical and appears to be mainly due to wearing a hijab, regular use of sunscreen and low dietary vitamin D intake. The vitamin D status of the women should be improved by taking vitamin D containing supplements or fortified foods.
2023-09-19T08:26:27Z
2023-09-19T08:26:27Z
2023
Article
Text
Lenz, J.S.; Tintle, N.; Kerlikowsky, F.; Badrasawi, M.; Zahdeh, R. et al.: Assessment of the vitamin D status and its determinants in young healthy students from Palestine. In: Journal of Nutritional Science 12 (2023), e38. DOI: https://doi.org/10.1017/jns.2023.25
https://www.repo.uni-hannover.de/handle/123456789/14893
http://dx.doi.org/10.15488/14774
eng
Journal of Nutritional Science 12 (2023)
2048-6790
https://doi.org/10.1017/jns.2023.25
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
New York, NY : Institutional Investor
oai:www.repo.uni-hannover.de:123456789/150932023-10-18T01:00:14Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessddc:690status-type:publishedVersionddc:380
Projecting Hydro-Morphodynamic Impacts of Planned Layout Changes for a Coastal Harbor
Lojek, Oliver
Goseberg, Nils
Schlurmann, Torsten
Germany
North Sea Coast [Germany]
Boats
Depth profiling
Doppler effect
The macrotidally influenced harbor of Dagebüll on the North Sea coast of Germany features a piled south jetty, for which provided constructive designs are investigated regarding their potential hydro-morphological impacts on the harbor area and adjacent navigational channel. The harbor experiences a steady accumulation of sediment. This results in a reduction of navigational depth and necessitates regular maintenance dredging constituting a cost aspect. A comprehensive field study was conducted, deploying a ridged inflatable boat (RIB) equipped with differential Global Positioning System, a winch for conductivity, temperature, and depth casting as well as sediment and water sampling and an acoustic Doppler current profiler for current profiling. Measurements reveal a tidally governed alternating flow pattern inducing a vortex current inside the harbor basin. Hydrodynamic sea floor grain sorting is detected through sediment sampling. A numerical model cascade is developed and calibrated against available tide gauge and sediment inventory data as well as multibeam survey data and acquired field measurements. The calibrated model cascade is used to simulate layout variants and compare resulting impacts to identify preferable jetty designs.
2023-10-17T06:39:28Z
2023-10-17T06:39:28Z
2021
Article
Text
Lojek, O.; Goseberg, N.; Schlurmann, T.: Projecting Hydro-Morphodynamic Impacts of Planned Layout Changes for a Coastal Harbor. In: Journal of Waterway, Port, Coastal, and Ocean Engineering 147 (2021), Nr. 6, 05021013. DOI: https://doi.org/10.1061/(asce)ww.1943-5460.0000666
https://www.repo.uni-hannover.de/handle/123456789/15093
http://dx.doi.org/10.15488/14974
eng
Journal of Waterway, Port, Coastal, and Ocean Engineering 147 (2021), Nr. 6
1943-5460
0733-950X
https://doi.org/10.1061/(asce)ww.1943-5460.0000666
https://creativecommons.org/licenses/by/4.0
CC BY 4.0 Unported
New York, NY : Soc.
oai:www.repo.uni-hannover.de:123456789/151142023-10-19T01:00:16Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380ddc:610
Recommendations for economic evaluations of cell and gene therapies: a systematic literature review with critical appraisal
Toumi, Mondher
Dabbous, Omar
Aballéa, Samuel
Drummond, Michael F.
Schulenburg, Johann-Matthias Graf von der
Malone, Daniel C.
Neumann, Peter J.
Sullivan, Sean D.
Tunis, Sean
Cost-effectiveness analysis
economic evaluation
gene therapy
health technology assessments
health-related quality of life
onasemnogene abeparvovec
spinal muscular atrophy
systematic literature review
Objective: No consensus exists on the ideal methodology to evaluate the economic impact and value of new, potentially curative gene therapies. We aimed to identify and describe published methodologic recommendations for the economic evaluation of gene therapies and assess whether these recommendations have been applied in published evaluations. Methods: This study was conducted in three stages: a systematic literature review of methodologic recommendations for economic evaluation of gene therapies; an assessment of the appropriateness of recommendations; and a review to assess the degree to which the recommendations were applied in published evaluations. Results: A total of 2,888 references were screened, 83 articles were reviewed to assess eligibility, and 20 papers were included. Fifty recommendations were identified, and 21 reached consensus thresholds. Most evaluations were based on naive treatment comparisons and did not apply consensus recommendations. Innovative payment mechanisms for gene therapies were rarely considered. The only widely applied recommendations related to modeling choices and methods. Conclusions: Methodological recommendations for economic evaluations of gene therapies are generally not being followed. Assessing the applicability and impact of the recommendations from this study may facilitate the implementation of consensus recommendations in future evaluations.
2023-10-18T06:09:11Z
2023-10-18T06:09:11Z
2023
Article
Text
Toumi, M.; Dabbous, O.; Aballéa, S.; Drummond, M.F.; von der Schulenburg, J.-M.G. et al.: Recommendations for economic evaluations of cell and gene therapies: a systematic literature review with critical appraisal. In: Expert Review of Pharmacoeconomics and Outcomes Research (ERPO) 23 (2023), Nr. 5, S. 483-497. DOI: https://doi.org/10.1080/14737167.2023.2197214
https://www.repo.uni-hannover.de/handle/123456789/15114
http://dx.doi.org/10.15488/14995
eng
Expert Review of Pharmacoeconomics and Outcomes Research (ERPO) 23 (2023), Nr. 5
1744-8379
1473-7167
https://doi.org/10.1080/14737167.2023.2197214
https://creativecommons.org/licenses/by-nc-nd/4.0
CC BY-NC-ND 4.0 Unported
Abingdon : Taylor & Francis Group
oai:www.repo.uni-hannover.de:123456789/151192023-10-19T01:00:14Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Stress concentration factors in FRP-reinforced tubular DKT joints under axial loads
Zavvar, E.
Henneberg, J.
Guedes Soares, C.
Axial loads
Fibre-reinforced polymer
Stress concentration factor
Uniplanar DKT-Joints
The stress concentration factors (SCFs) in uniplanar fibre-reinforced polymer (FRP) DKT joints are calculated under five axial loading conditions to determine the maximum SCFs. To this end, 108 finite element models of reinforced DKT joints with different FRPs and geometrical parameters are analysed. Available experimental data and formulas are used to validate the finite element models. The validated finite element models are utilized to investigate the effects of the FRP parameters along with different geometrical parameters on the stress concentration factors in uniplanar DKT joints. The simulations show a reduction of the maximum SCF by around 40% compared to unreinforced DKT joints. The reduction effect increases significantly with increasing the FRP thickness and the number of layers. Despite the notable efficacy of the FRP sheets on the drop of the SCFs in the X-connections, there is not any study or equation on the X-joints with FRP. Therefore, a precise equation is proposed for quantifying the SCFs in X-connections with FRP and is checked against the UK DoE acceptance standard.
2023-10-18T06:09:12Z
2023-10-18T06:09:12Z
2023
Article
Text
Zavvar, E.; Henneberg, J.; Guedes, Soares, C.: Stress concentration factors in FRP-reinforced tubular DKT joints under axial loads. In: Marine Structures 90 (2023), 103429. DOI: https://doi.org/10.1016/j.marstruc.2023.103429
https://www.repo.uni-hannover.de/handle/123456789/15119
http://dx.doi.org/10.15488/15000
eng
Marine Structures 90 (2023)
1873-4170
0951-8339
https://doi.org/10.1016/j.marstruc.2023.103429
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier Science
oai:www.repo.uni-hannover.de:123456789/156242023-11-25T02:00:31Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Uncertainty and Variability Analysis of Agent-Based Transport Models
Bienzeisler, Lasse
Lelke, Torben
Wage, Oskar
Huck, Lena-Marie
Friedrich, Bernhard
Agent-based Transport Simulation
MATSim
Output Variation
This paper presents an analysis of the output variability of agent-based transport models. We simulated a MATSim model of the city of Hanover multiple times with identical input and evaluated the resulting travel times on different level of aggregation. On a global level, we observed minor variations of travel times. However, the results show an increased variation when examining the output on the level of districts or for individual agents. A recommendation for estimating the required number of simulation runs for a stable output of travel time for the purposed aggregation level is derived from our case study.
2023-11-24T05:59:40Z
2023-11-24T05:59:40Z
2022
Article
Text
Bienzeisler, L.; Lelke, T.; Wage, O.; Huck, L.-M.; Friedrich, B.: Uncertainty and Variability Analysis of Agent-Based Transport Models. In: Transportation Research Procedia 62 (2022), S. 719-726. DOI: https://doi.org/10.1016/j.trpro.2022.02.089
https://www.repo.uni-hannover.de/handle/123456789/15624
http://dx.doi.org/10.15488/15503
eng
Transportation Research Procedia 62 (2022)
2352-1465
https://doi.org/10.1016/j.trpro.2022.02.089
https://creativecommons.org/licenses/by-nc-nd/4.0/
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/156872023-11-30T02:00:25Zcom_123456789_15col_123456789_18doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:620ddc:380
Robotic process automation (RPA): maturity model for identifying RPA-suitable processes with regard to the dimension of data
Robotergesteuerte Prozessautomatisierung (RPA): Reifegradmodell zur Identifizierung RPA geeigneter Prozesse hinsichtlich der Dimension Daten
Kutzner, Christian
Kuiter, Kilian
Jurisic, Stjepan
Stonis, Malte
Nyhuis, Peter
automation
data
maturity model
Robotic Process Automation
RPA
Automatisierung
Date
RPA
Reifegradmodell
For the introduction of RPA in a company, the first step is to identify suitable business processes. For this purpose, the processes are evaluated with regard to various selection criteria, such as complexity or case-sensitiv-ity. Another criterion for the selection and evaluation of processes is the data on which the process is based. In this paper, a maturity model is presented, which subdivides the selection criterion data into the 5 assessable categories digitisation level, data quantity, data variance, data for-mat and data responsibility.
Für die Einführung von RPA im Unternehmen müssen in einem ersten Schritt geeignete Unternehmensprozesse identifiziert werden. Hierzu werden die Prozesse hinsichtlich verschiedener Auswahlkriterien bewertet, wie z. B. Komplexität oder Fallhäufigkeit. Ein weiteres Kriterium zur Auswahl und Bewertung von Prozessen sind die dem Prozess zugrundeliegenden Daten. In diesem Paper wird ein Reifegradmodell vorgestellt, welches das Auswahlkriterium Daten in die 5 bewertbaren Kategorien Digitalisierungsgrad, Datenmenge, Datenvarianz, Datenformat und Datenverantwortung untergliedert.
2023-11-29T05:22:33Z
2023-11-29T05:22:33Z
2022
Article
Text
Kutzner, C.; Kuiter, K.; Jurisic, S.; Stonis, M.; Nyhuis, P.: Robotergesteuerte Prozessautomatisierung (RPA): Reifegradmodell zur Identifizierung RPA geeigneter Prozesse hinsichtlich der Dimension Daten. In: Logistics Journal: Nicht-referierte Veröffentlichungen (2022), online first. DOI: https://doi.org/10.2195/lj_notrev_kutzner_de_202212_01
https://www.repo.uni-hannover.de/handle/123456789/15687
http://dx.doi.org/10.15488/15566
ger
Logistics Journal: Nicht-referierte Veröffentlichungen (2022), online first
1860-5923
https://doi.org/10.2195/lj_notrev_kutzner_de_202212_01
https://www.hbz-nrw.de/produkte/open-access/lizenzen/dppl/dppl/DPPL_v2_de_06-2004
Digital Peer Publishing Lizenz (v2, de)
Stuttgart ; Dortmund : WGTL
oai:www.repo.uni-hannover.de:123456789/159212024-01-06T02:00:06Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessddc:330status-type:publishedVersionddc:380
Indonesia–Import Licensing Regimes: GATT Rules for Agricultural Trade?
Ahn, Dukgeun
Gnutzmann-Mkrtchyan, Arevik
This paper examines two disputes brought by the United States and New Zealand in response to a series of import sanctions for agricultural products imposed by the Indonesian government to promote food self-sufficiency. We document the heterogeneous effect the sanctioning measures had on Indonesia's partners. We argue that Indonesia's import licensing regimes acted as a high, sometimes prohibitive, fixed cost of exporting. Frequent changes of regulation provided additional challenges and increased the costs of exporting. These properties determined the differential impacts of Indonesia's measures where some sustained significant market losses while other large exporters, in particular Australia, following a short decline strengthened their market position and export levels.
2024-01-05T06:33:30Z
2024-01-05T06:33:30Z
2019
Article
Text
Ahn, D.; Gnutzmann-Mkrtchyan, A.: Indonesia–Import Licensing Regimes: GATT Rules for Agricultural Trade?. In: World Trade Review 18 (2019), Nr. 2, S. 197-218. DOI: https://doi.org/10.1017/s1474745619000119
https://www.repo.uni-hannover.de/handle/123456789/15921
http://dx.doi.org/10.15488/15797
eng
World Trade Review 18 (2019), Nr. 2
1475-3138
1474-7456
https://doi.org/10.1017/s1474745619000119
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
Cambridge : Cambridge Univ. Press
oai:www.repo.uni-hannover.de:123456789/159222024-01-06T02:00:07Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessddc:330status-type:publishedVersionddc:380
Expired Measures, Excess Duty Drawbacks and Causation: The Appellate Body Report in EU-PET (Pakistan)
Gnutzmann-Mkrtchyan, Arevik
Van Damme, Isabelle
The Appellate Body report in EU-PET (Pakistan) raises distinct questions regarding the need for findings in relation to expired measures, the conditions under which duty drawback schemes may constitute subsidies and the causation methodology to apply under the SCM Agreement. We conclude that the report offers no clear guidance on whether the function and design of WTO dispute settlement require or preclude findings in case of expired measures. We welcome the Appellate Body's conclusion that, in case of duty drawback schemes, the financial contribution element of the subsidy is limited to the excess remission or drawback of import charges. Finally, although the Appellate Body rightly found that authorities are free to choose the methodology for the causation analysis provided that the analysis is complete and objective, the methodology used by the investigating authority in this case shows a number of deficiencies that were not recognized by the Appellate Body.
2024-01-05T06:33:30Z
2024-01-05T06:33:30Z
2020
Article
Text
Gnutzmann-Mkrtchyan, A.; Van Damme, I.: Expired Measures, Excess Duty Drawbacks and Causation: The Appellate Body Report in EU-PET (Pakistan). In: World Trade Review 19 (2020), Nr. 2, S. 232-248. DOI: https://doi.org/10.1017/s1474745620000087
https://www.repo.uni-hannover.de/handle/123456789/15922
http://dx.doi.org/10.15488/15798
eng
World Trade Review 19 (2020), Nr. 2
1475-3138
1474-7456
https://doi.org/10.1017/s1474745620000087
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0 Unported
Cambridge : Cambridge Univ. Press
oai:www.repo.uni-hannover.de:123456789/160772024-01-19T02:00:12Zcom_123456789_1col_123456789_3doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Reliability and reliability sensitivity analysis of structure by combining adaptive linked importance sampling and Kriging reliability method
Liu, Fuchao
Wei, Pengfei
Zhou, Changcong
Yue, Zhufeng
Active learning Kriging model
Adaptive linked importance sampling
Reliability analysis
Sensitivity analysis
Small failure probability
The application of reliability analysis and reliability sensitivity analysis methods to complicated structures faces two main challenges: small failure probability (typical less than 10−5) and time-demanding mechanical models. This paper proposes an improved active learning surrogate model method, which combines the advantages of the classical Active Kriging – Monte Carlo Simulation (AK-MCS) procedure and the Adaptive Linked Importance Sampling (ALIS) procedure. The proposed procedure can, on the one hand, adaptively produce a series of intermediate sampling density approaching the quasi-optimal Importance Sampling (IS) density, on the other hand, adaptively generate a set of intermediate surrogate models approaching the true failure surface of the rare failure event. Then, the small failure probability and the corresponding reliability sensitivity indices are efficiently estimated by their IS estimators based on the quasi-optimal IS density and the surrogate models. Compared with the classical AK-MCS and Active Kriging – Importance Sampling (AK-IS) procedure, the proposed method neither need to build very large sample pool even when the failure probability is extremely small, nor need to estimate the Most Probable Points (MPPs), thus it is computationally more efficient and more applicable especially for problems with multiple MPPs. The effectiveness and engineering applicability of the proposed method are demonstrated by one numerical test example and two engineering applications.
2024-01-18T09:11:33Z
2024-01-18T09:11:33Z
2020
Article
Text
Liu, F.; Wei, P.; Zhou, C.; Yue, Z.: Reliability and reliability sensitivity analysis of structure by combining adaptive linked importance sampling and Kriging reliability method. In: Chinese Journal of Aeronautics 33 (2020), Nr. 4, S. 1218-1227. DOI: https://doi.org/10.1016/j.cja.2019.12.032
https://www.repo.uni-hannover.de/handle/123456789/16077
http://dx.doi.org/10.15488/15951
eng
Chinese Journal of Aeronautics 33 (2020), Nr. 4
1000-9361
2588-9230
1000-9361
https://doi.org/10.1016/j.cja.2019.12.032
https://creativecommons.org/licenses/by-nc-nd/4.0
CC BY-NC-ND 4.0 Unported
Amsterdam [u.a.] : Elsevier
oai:www.repo.uni-hannover.de:123456789/167242024-03-17T06:52:36Zcom_123456789_11col_123456789_12ddc:550doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Hydrodynamic coupling of multi-fidelity solvers in REEF3D with application to ship-induced wave modelling
Dempwolff, León-Carlos
Windt, Christian
Bihs, Hans
Melling, Gregor
Holzwarth, Ingrid
Goseberg, Nils
Far-field wave
Groin overtopping
Long-period waves
Model interfaces
Multi-scale modelling
SWE-CFD coupling
Validation
Ship-induced waves are an increasingly relevant hydrodynamic forcing factor in waterways travelled by large seagoing ships. The discrepancy between the small-scale wave-structure interaction near embankments and the larger-scale wave generation and propagation poses challenges for the prediction of ship-induced waves as a multi-scale problem. Therefore, a novel hydrodynamic coupling interface is presented that allows information transfer from the shallow-water-equation (SWE) solver REEF3D
2024-03-15T09:40:21Z
2024-03-15T09:40:21Z
2023
Article
Text
Dempwolff, L.-C.; Windt, C.; Bihs, H.; Melling, G.; Holzwarth, I. et al.: Hydrodynamic coupling of multi-fidelity solvers in REEF3D with application to ship-induced wave modelling. In: Coastal Engineering 188 (2024), 104452. DOI: https://doi.org/10.1016/j.coastaleng.2023.104452
https://www.repo.uni-hannover.de/handle/123456789/16724
http://dx.doi.org/10.15488/16597
eng
Coastal Engineering 188 (2024)
1872-7379
0378-3839
https://doi.org/10.1016/j.coastaleng.2023.104452
https://creativecommons.org/licenses/by/4.0
CC BY 4.0 Unported
Amsterdam [u.a.] : Elsevier Science
oai:www.repo.uni-hannover.de:123456789/168552024-03-22T02:00:24Zcom_123456789_1col_123456789_10doc-type:Articledoc-type:Textopen_accessstatus-type:publishedVersionddc:380
Examining customers’ critical acceptance factors toward ridepooling services
Werth, Oliver
Sonneberg, Marc-Oliver
Leyerer, Max
Breitner, Michael H.
Acceptance tests
Environmental technology
Least squares approximations
Software testing
Statistical tests
% reductions
Customer acceptance
End-points
Environmental awareness
Intention to use
Matchings
Mobility service
Service provider
Start point
Urban areas
Sales
Ridepooling is a new mobility service mainly for people in cities and urban areas. By matching the routes of customers with similar start and end points while driving in an optimally pooled manner, meaningful reductions in road traffic and related emissions can be achieved. Such services must meet customers’ demands appropriately to achieve sustainable customer acceptance. Service providers face diverse customer expectations and prejudices that differ from those toward existing transportation modes. Today, most ridepooling trips are conducted with only one customer, confirming impressions of nonoptimal operation. Using a survey-based approach, possible relevant constructs for the acceptance of and intention to use ridepooling services are analyzed. Testing constructs from the Unified Theory of Acceptance and Use of Technology 2 and environmental awareness, partial least squares analysis was performed with the software SmartPLS to investigate a dataset of 224 respondents. Results suggest that attitude toward use, perceived usefulness, and performance expectancy have an influence on the behavioral intention to use ridepooling services. In contrast, environmental awareness, price value, and effort expectancy do not have such an influence. The study expands the literature about customer acceptance of ridepooling service as well as new mobility services in general. Further, the paper provides research implications and recommendations for the development and implementation of the ridepooling concept for service providers.
2024-03-21T10:56:55Z
2024-03-21T10:56:55Z
2021
Article
Text
Werth, O.; Sonneberg, M.-O.; Leyerer, M.; Breitner M.H.: Examining customers’ critical acceptance factors toward ridepooling services. In: Transportation Research Record: Journal of the Transportation Research Board 2675 (2021), Nr. 11, S. 1310-1323. DOI: https://doi.org/10.1177/03611981211026304
https://www.repo.uni-hannover.de/handle/123456789/16855
http://dx.doi.org/10.15488/16728
eng
Transportation Research Record: Journal of the Transportation Research Board 2675 (2021), Nr. 11
2169-4052
0361-1981
https://doi.org/10.1177/03611981211026304
https://creativecommons.org/licenses/by-nc/4.0/
CC BY-NC 4.0 Unported
Thousand Oaks, CA : Sage Publishing