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Browsing by Subject "experimental study"

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Analysis of peat soil organic carbon, total nitrogen, soil water content and basal respiration: Is there a ‘best’ drying temperature?

Dettmann, Ullrich.; Kraft, Nicky Nancy; Rech, Raimund; Heidkamp, Arne; Tiemeyer, Bärbel (Amsterdam [u.a.] : Elsevier Science, 2021)

Soil needs to be dried in order to determine water content, soil organic carbon content (SOC) and total nitrogen content (N). Water content is commonly measured using standard methods that involve drying temperatures of ...
Angular dependence of the Wigner time delay upon tunnel ionization of H2

Trabert, D.; Brennecke, S.; Fehre, K.; Anders, N.; Geyer, A.; Grundmann, S.; Schöffler, M. S.; Schmidt, L. Ph. H.; Jahnke, T.; Dörner, R.; Kunitski, M.; Eckart, S. ([London] : Nature Publishing Group UK, 2021)

When a very strong light field is applied to a molecule an electron can be ejected by tunneling. In order to quantify the time-resolved dynamics of this ionization process, the concept of the Wigner time delay can be used. ...
Demistify: A large-eddy simulation (LES) and single-column model (SCM) intercomparison of radiation fog

Boutle, Ian; Angevine, Wayne; Bao, Jian-Wen; Bergot, Thierry; Bhattacharya, Ritthik; Bott, Andreas; Ducongé, Leo; Forbes, Richard; Goecke, Tobias; Grell, Evelyn; Hill, Adrian; Igel, Adele L.; Kudzotsa, Innocent; Lac, Christine; Maronga, Bjorn; Romakkaniemi, Sami; Schmidli, Juerg; Schwenkel, Johannes; Steeneveld, Gert-Jan; Vié, Benoît (Katlenburg-Lindau : EGU, 2022)

An intercomparison between 10 single-column (SCM) and 5 large-eddy simulation (LES) models is presented for a radiation fog case study inspired by the Local and Non-local Fog Experiment (LANFEX) field campaign. Seven of ...
Detection of the 5p – 4f orbital crossing and its optical clock transition in Pr9+

Bekker, H.; Borschevsky, A.; Harman, Z.; Keitel, C.H.; Pfeifer, T.; Schmidt, P.O.; Crespo López-Urrutia, J.R.; Berengut, J.C. ([London] : Nature Publishing Group UK, 2019)

Recent theoretical works have proposed atomic clocks based on narrow optical transitions in highly charged ions. The most interesting candidates for searches of physics beyond the Standard Model are those which occur at ...
Device-independent quantum key distribution with random key basis

Schwonnek, René; Goh, Koon Tong; Primaatmaja, Ignatius W.; Tan, Ernest Y.-Z.; Wolf, Ramona; Scarani, Valerio; Lim, Charles C.-W. ([London] : Nature Publishing Group UK, 2021)

Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to distribute secret keys in an insecure network. It thus represents the ultimate form of cryptography, offering not only ...
Evaluation of the dynamic core of the PALM model system 6.0 in a neutrally stratified urban environment: Comparison between les and wind-tunnel experiments

Gronemeier, Tobias; Surm, Kerstin; Harms, Frank; Leitl, Bernd; Maronga, Björn; Raasch, Siegfried (Katlenburg-Lindau : Copernicus, 2021)

We demonstrate the capability of the PALM model system version 6.0 to simulate neutrally stratified urban boundary layers. Our simulation uses the real-world building configuration of the HafenCity area in Hamburg, Germany. ...
The influence of basin setting and turbidity current properties on the dimensions of submarine lobe elements

Spychala, Yvonne T.; Eggenhuisen, Joris T.; Tilston, Mike; Pohl, Florian (Oxford : Wiley-Blackwell, 2020)

Submarine lobes have been identified within various deep-water settings, including the basin-floor, the base of slope and the continental slope. Their dimensions and geometries are postulated to be controlled by the ...
Natural colloid mobilization and leaching in wettable and water repellent soil under saturated condition

Sepehrnia, Nasrollah; Fishkis, Olga; Huwe, Bernd; Bachmann, Jörg (Berlin : De Gruyter, 2018)

The coupled transport of pollutants that are adsorbed to colloidal particles has always been a major topic for environmental sciences due to many unfavorable effects on soils and groundwater. This laboratory column study ...
Normative data of multifrequency tympanometry in rabbits

Stieve, Martin; Hedrich, Hans; Mojallal, Hamidreza; Behrens, Peter; Müller, Peter; Lenarz, Thomas (London : SAGE Publications Ltd., 2008)

In an experimental study, we evaluated acoustic immittance in rabbits in order to use these data as normative values for further experimental investigations. This study is the first experimental evaluation of both conventional ...
Novel approach to observing system simulation experiments improves information gain of surface-atmosphere field measurements

Metzger, Stefan; Durden, David; Paleri, Sreenath; Sühring, Matthias; Butterworth, Brian J.; Florian, Christopher; Mauder, Matthias; Plummer, David M.; Wanner, Luise; Xu, Ke; Desai, Ankur R. (Katlenburg-Lindau : Copernicus, 2021)

The observing system design of multidisciplinary field measurements involves a variety of considerations on logistics, safety, and science objectives. Typically, this is done based on investigator intuition and designs of ...
On the Discrepancy in Simultaneous Observations of the Structure Parameter of Temperature Using Scintillometers and Unmanned Aircraft

Braam, Miranda; Beyrich, Frank; Bange, Jens; Platis, Andreas; Martin, Sabrina; Maronga, Björn; Moene, Arnold F. (Dordrecht : Springer Netherlands, 2016)

We elaborate on the preliminary results presented in Beyrich et al. (in Boundary-Layer Meteorol 144:83–112, 2012), who compared the structure parameter of temperature (C2T) obtained with the unmanned meteorological mini ...
On the estimation of wind comfort in a building environment by micro-scale simulation

Gross, Günter (Stuttgart : Gebrüder Borntraeger Verlagsbuchhandlung, 2014)

A three-dimensional micro-scale model is used to study some aspects of wind comfort in a built-up area. The equations for calculating the mean wind have been extended by a Markov approach for short-term wind fluctuations. ...
Organic matter coatings of soil minerals affect adsorptive interactions with phenolic and amino acids

Gao, J.; Jansen, B.; Cerli, C.; Helmus, R.; Mikutta, R.; Dultz, S.; Guggenberger, G.; Vogel, C.; Kalbitz, K. (Hoboken, NJ : Blackwell Publishing Ltd, 2018)

Phenolic (PAs) and amino acids (AAs) contribute potentially to the stabilization of organic matter (OM) in soil by forming mineral–organic associations (MOAs). However, little is known about how natural OM coating affects ...
Physical modelling of arctic coastlines-progress and limitations

Korte, Sophia; Gieschen, Rebekka; Stolle, Jacob; Goseberg, Nils (Basel : MDPI AG, 2020)

Permafrost coastlines represent a large portion of the world's coastal area and these areas have become increasingly vulnerable in the face of climate change. The predominant mechanism of coastal erosion in these areas has ...
Second sound in the crossover from the Bose-Einstein condensate to the Bardeen-Cooper-Schrieffer superfluid

Hoffmann, Daniel K.; Singh, Vijay Pal; Paintner, Thomas; Jäger, Manuel; Limmer, Wolfgang; Mathey, Ludwig; Hecker Denschlag, Johannes ([London] : Nature Publishing Group UK, 2021)

Second sound is an entropy wave which propagates in the superfluid component of a quantum liquid. Because it is an entropy wave, it probes the thermodynamic properties of the quantum liquid. Here, we study second sound ...
Speciation of uranium: Compilation of a thermodynamic database and its experimental evaluation using different analytical techniques

Mühr-Ebert, Elena L.; Wagner, Frank; Walther, Clemens (London : Elsevier Ltd., 2019)

Environmental hazards are caused by uranium mining legacies and enhanced radioactivity in utilized groundwater and surface water resources. Knowledge of uranium speciation in these waters is essential for predicting ...
Sympathetic cooling of a trapped proton mediated by an LC circuit

Bohman, M.; Grunhofer, V.; Smorra, C.; Wiesinger, M.; Will, C.; Borchert, M.J.; Devlin, J.A.; Erlewein, S.; Fleck, M.; Gavranovic, S.; Harrington, J.; Latacz, B.; Mooser, A.; Popper, D.; Wursten, E.; Blaum, K.; Matsuda, Y.; Ospelkaus, C.; Quint, W.; Walz, J.; Ulmer, S. (London [u.a.] : Nature Publ. Group, 2021)

Efficient cooling of trapped charged particles is essential to many fundamental physics experiments1,2, to high-precision metrology3,4 and to quantum technology5,6. Until now, sympathetic cooling has required close-range ...
Verhalten reaktiver Brandschutzsysteme auf kreisförmigen Zuggliedern aus Blank- und Baustahl

Häßler, Dustin (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2016)

[no abstract]

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