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Adaptable orthopedic shape memory implants

Pfeifer, Ronny; Müller, Christian W.; Hurschler, Christof; Kaierle, Stefan; Wesling, Volker; Haferkamp, Heinz (Amsterdam : Elsevier B.V., 2013)

Apart from biological factors, the bone healing process strongly depends on the mechanical properties of the implant applied. The stiffness of the implant influences the micro-motion, one of the most important stimuli of ...
Additive manufacturing of glass: CO2-Laser glass deposition printing

Von Witzendorff, Philipp; Pohl, Leonhard; Suttmann, Oliver; Heinrich, Peter; Heinrich, Achim; Zander, Jörg; Bragard, Holger; Kaierle, Stefan (Amsterdam : Elsevier B.V., 2018)

Additive manufacturing is used in several industrial sectors where polymers and metals are established materials. Different academic studies prove that additive manufacturing methods can be applied on glass materials using ...
Co-transfection of plasmid DNA and laser-generated gold nanoparticles does not disturb the bioactivity of GFP-HMGB1 fusion protein

Petersen, Svea; Soller, Jan T.; Wagner, Siegfried; Richter, Andreas; Bullerdiek, Jörn; Nolte, Ingo; Barcikowski, Stephan; Murua Escobar, Hugo (London : Biomed Central, 2009)

Ultrashort pulsed laser ablation in liquids represents a powerful tool for the generation of pure gold nanoparticles (AuNPs) avoiding chemical precursors and thereby making them especially interesting for biomedical ...
Comparison of LASER and LED illumination for fiber optic fringe projection

Matthias, Steffen; Kästner, Markus; Reithmeier, Eduard (Bellingham, Wash. : SPIE, 2016)

The inspection of functional elements is a crucial part of modern production cycles. However, with higher integration of production machinery and products, the accessibility for measurement systems is more and more limited. ...
Comparison of nanoparticle-mediated transfection methods for DNA expression plasmids: Efficiency and cytotoxicity

Durán, Maria Carolina; Willenbrock, Saskia; Barchanski, Annette; Müller, Jessika-M.V.; Maiolini, Arianna; Soller, Jan T.; Barcikowski, Stephan; Nolte, Ingo; Feige, Karsten; Murua Escobar, Hugo (London : Biomed Central, 2011)

Background: Reproducibly high transfection rates with low methodology-induced cytotoxic side effects are essential to attain the required effect on targeted cells when exogenous DNA is transfected. Different approaches and ...
Dispensing pico to nanolitre of a natural hydrogel by laser-assisted bioprinting

Gruene, Martin; Unger, Claudia; Koch, Lothar; Deiwick, Andrea; Chichkov, Boris (London : Biomed Central, 2011)

Background: Laser-assisted bioprinting of multi-cellular replicates in accordance with CAD blueprint may substantially improve our understandings of fundamental aspects of 3 D cell-cell and cell-matrix interactions in ...
Downstream processing of high chain length polysialic acid using membrane adsorbers and clay minerals for application in tissue engineering

Bice, Ismet; Celik, Hilal; Wolff, Christopher; Beutel, Sascha; Zahid, Maria; Hitzmann, Bernd; Rinas, Ursula; Kasper, Cornelia; Gerardy-Schahn, Rita; Scheper, Thomas (Weinheim : Wiley-VCH Verlag, 2013)

Polysialic acid (polySia) is a carbohydrate polymer of varying chain length. It is a promising scaffold material for tissue engineering. In this work, high chain length polySia was produced by an Escherichia coli K1 strain ...
Effects of cavitation bubble interaction with temporally separated fs-laser pulses

Tinne, Nadine; Knoop, Gesche; Kallweit, Nicole; Veith, Sonja; Bleeker, Sebastian; Lubatschowski, Holger; Krüger, Alexander; Ripken, Tammo (Bellingham, WA : SPIE - International Society for Optical Engineering, 2014)

We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse ...
Experimental setup for camera-based measurements of electrically and optically stimulated luminescence of silicon solar cells and wafers

Hinken, David; Schinke, Carsten; Herlufsen, Sandra; Schmidt, Arne; Bothe, Karsten; Brendel, Rolf (College Park, MD : American Institute of Physics, 2011)

We report in detail on the luminescence imaging setup developed within the last years in our laboratory. In this setup, the luminescence emission of silicon solar cells or silicon wafers is analyzed quantitatively. Charge ...
Femtosecond laser fabricated spike structures for selective control of cellular behavior

Schlie, Sabrina; Fadeeva, Elena; Koch, Jürgen; Ngezahayo, Anaclet; Chichkov, Boris (London : SAGE Publications Ltd., 2010)

In this study we investigate the potential of femtosecond laser generated micrometer sized spike structures as functional surfaces for selective cell controlling. The spike dimensions as well as the average spike to spike ...
Fiber amplifiers for gravitational wave detectors : temporal dynamics and coherent beam combining

Tünnermann, Henrik (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2013)

[no abstract]
Gold Nanoparticle Mediated Laser Transfection for Efficient siRNA Mediated Gene Knock Down

Heinemann, Dag; Schomaker, Markus; Kalies, Stefan; Schieck, Maximilian; Carlson, Regina; Murua Escobar, Hugo; Ripken, Tammo; Meyer, Heiko; Heisterkamp, Alexander (San Francisco, California, US : PLOS, 2013)

Laser based transfection methods have proven to be an efficient and gentle alternative to established molecule delivery methods like lipofection or electroporation. Among the laser based methods, gold nanoparticle mediated ...
Have I been here before? Learning to Close the Loop with LiDAR Data in Graph-Based SLAM

Habich, Tim-Lukas; Stuede, Marvin; Labbé, Mathieu; Spindeldreier, Svenja (Piscataway, NJ : IEEE, 2021-08-24)

This work presents an extension of graph-based SLAM methods to exploit the potential of 3D laser scans for loop detection. Every high-dimensional point cloud is replaced by a compact global descriptor, whereby a trained ...
Interaction mechanisms of cavitation bubbles induced by spatially and temporally separated fs-laser pulses

Tinne, Nadine; Kaune, Brigitte; Krüger, Alexander; Ripken, Tammo (San Francisco, CA : Public Library of Science (PLoS), 2014)

The emerging use of femtosecond lasers with high repetition rates in the MHz regime together with limited scan speed implies possible mutual optical and dynamical interaction effects of the individual cutting spots. In ...
An international comparison of individual tree detection and extraction using airborne laser scanning

Kaartinen, Harri; Hyyppä, Juha; Yu, Xiaowei; Vastaranta, Mikko; Hyyppä, Hannu; Kukko, Antero; Holopainen, Markus; Heipke, Christian; Hirschmugl, Manuela; Morsdorf, Felix; Næsset, Erik; Pitkänen, Juho; Popescu, Sorin; Solberg, Svein; Wolf, Bern Michael; Wu, Jee-Cheng (Basel : MDPI AG, 2012)

The objective of the "Tree Extraction" project organized by EuroSDR (European Spatial data Research) and ISPRS (International Society of Photogrammetry and Remote Sensing) was to evaluate the quality, accuracy, and feasibility ...
Investigation of biophysical mechanisms in gold nanoparticle mediated laser manipulation of cells using a multimodal holographic and fluorescence imaging setup

Kalies, Stefan; Antonopoulos, Georgios C.; Rakoski, Mirko S.; Heinemann, Dag; Schomaker, Markus; Ripken, Tammo; Meyer, Heiko (San Francisco, CA : Public Library of Science (PLoS), 2015)

Laser based cell manipulation has proven to be a versatile tool in biomedical applications. In this context, combining weakly focused laser pulses and nanostructures, e.g. gold nanoparticles, promises to be useful for high ...
Map Management Approach for SLAM in Large-Scale Indoor and Outdoor Areas

Ehlers, Simon F. G.; Stuede, Marvin; Nuelle, Kathrin; Ortmaier, Tobias (Piscataway, NJ, USA : Institute of Electrical and Electronics Engineers Inc., 2020)

This work presents a semantic map management approach for various environments by triggering multiple maps with different simultaneous localization and mapping (SLAM) configurations. A modular map structure allows to add, ...
Mode-cleaning and injection optics of the gravitational-wave detector GEO600

Goßler, S.; Casey, M.M.; Freise, A.; Grant, A.; Grote, H.; Heinzel, G.; Heurs, Michèle; Husman, M.E.; Kötter, K.; Leonhardt, V.; Lück, Harald; Malec, M.; Mossavi, K.; Nagano, S.; McNamara, P.W.; Plissi, M.V.; Quetschke, V.; Robertson, D.I.; Robertson, N.A.; Rüdiger, A.; Schilling, R.; Skeldon, K.D.; Strain, K.A.; Torrie, C.I.; Ward, H.; Weiland, U.; Willke, B.; Winkler, W.; Hough, J.; Danzmann, K. (College Park, MD : American Institute of Physics (AIP), 2003)

A study to investigate the mode-cleaning and injection optics of the gravitational-wave detector GEO600 was presented. The instrument uses two high-finesse triangular ring cavities of 8 m optical wavelength each, as an ...
Modeling of photoluminescence in laser-based lighting systems

Chatzizyrli, Elisavet; Tinne, Nadine; Lachmayer, Roland; Neumann, Jörg; Kracht, Dietmar (Bellingham, Wash. : SPIE, 2017)

The development of laser-based lighting systems has been the latest step towards a revolution in illumination technology brought about by solid-state lighting. Laser-activated remote phosphor systems produce white light ...
Near diffraction limited high-power narrow-linewidth Er3+-doped fiber amplifiers : developments towards laser sources at 1.5 [my]m wavelength for gravitational wave astronomy

Kuhn, Vincent (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2011)

[no abstract]

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