@article{MonkmanStrieglPremetal., author = {Monkman, Gareth J. and Striegl, Birgit and Prem, Nina and Sindersberger, Dirk}, title = {Electrical Properties of Magnetoactive Boron-Organo-Silicon Oxide Polymers}, series = {Macromolecular Chemistry and Physics}, volume = {221}, journal = {Macromolecular Chemistry and Physics}, number = {4}, publisher = {Wiley}, doi = {10.1002/macp.201900342}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-26488}, pages = {1 -- 8}, abstract = {The electrical properties of rheopectic magnetoactive composites comprising boron-organo-silicon oxide dielectric matrices containing carbonyl iron microparticles are presented for the first time. The increase in interfacial magnetocapacitance is seen to greatly exceed that experienced when using conventional elastomeric matrices such as polydimethylsiloxane. In addition to the increase in capacitance, a simultaneous and sharp decrease in the parallel electrical resistance over several orders of magnitude is also observed. The effects are time dependent but repeatable. Potential applications include magnetically controlled frequency dependent devices, magnetic sensor systems, weighting elements for neural networks, etc.}, language = {en} } @misc{BaldaranovKilicPflugetal., author = {Baldaranov, Dobri and Kilic, Mustafa and Pflug, Kenny and Theiss, Stephan and Leis, Alexander and Pemmerl, Josef and Pels, Hendrik and Boy, Sandra and Bogdahn, Ulrich and Schlachetzki, Felix}, title = {Prehospital stroke education in paramedics}, series = {European Journal of Neurology}, volume = {22}, journal = {European Journal of Neurology}, number = {Suppl. 1}, publisher = {Wiley}, pages = {800}, abstract = {Background and aims: Rapid pre-hospital identification of stroke symptoms result in therapy directed admission to dedicated stroke units. Widespread application of stroke scales reveal high sensitivity but low specificity, especially in non-academic first aid personal. In our previous work we show that prehospital stroke diagnostics based on neurolo-gical examination and transcranial color-coded Duplex so-nography (TCCS) is feasible and results in high sensitivity and specificity for middle cerebral artery / distal internal carotid artery occlusion. The aim of our ongoing study is to design and evaluate a dedicated stroke educational program for paramedics including transcranial ultrasound. This is a prerequisite for a telemedical decision support system in the absence of stroke experienced emergency doctors. Methods: We currently educate 6 paramedics in advanced stroke neurology and also transcranial ultrasound examina-tion during a course of 2 months. The web-based curricu-lum was designed in two parts. The first was theoretical and the second will be the real-life training under neurological supervision. For final assessment of the theoretical know-ledge a control group will be implemented without specific stroke expertise. The stroke-educated paramedics will have to assist stroke investigation, perform pre-hospital TCCS and enter the date in a mobile telestroke pad. The data set will be send to an in-hospital stroke physician. We will as-sess the mean time to reach the diagnostic assessment, its sensitivity and specificity and the patient outcome after 30 days. Results: Our study is ongoing Conclusion: The study just reach the 2 part and we will be glad to present our data on the meeting EAN 2015. Disclosure: Nothing to disclose}, language = {en} } @misc{Dendorfer, author = {Dendorfer, Sebastian}, title = {Biomechanische Aspekte bei Sportverletzungen}, series = {OT World Leipzig, Internationale Fachmesse und Weltkongress f{\"u}r Orthop{\"a}die und Rehatechnik, 10.-13. Mai 2022}, journal = {OT World Leipzig, Internationale Fachmesse und Weltkongress f{\"u}r Orthop{\"a}die und Rehatechnik, 10.-13. Mai 2022}, language = {de} } @misc{AuerReinkerSuessetal., author = {Auer, Simon and Reinker, Lukas and S{\"u}ß, Franz and Dendorfer, Sebastian}, title = {Comparing calculated and measured muscle activity of thigh muscles in dynamic motion.}, series = {27th Congress of the European Society of Biomechanics, 26 - 29 June 2022, Porto, Portugal}, journal = {27th Congress of the European Society of Biomechanics, 26 - 29 June 2022, Porto, Portugal}, pages = {640}, language = {en} } @misc{MelznerPfeiferSuessetal., author = {Melzner, Maximilian and Pfeifer, Christian and S{\"u}ß, Franz and Dendorfer, Sebastian}, title = {Muskuloskeletal analysis of elbow stability for common injury patterns}, series = {27th Congress of the European Society of Biomechanics, 26 - 29 June 2022, Porto, Portugal}, journal = {27th Congress of the European Society of Biomechanics, 26 - 29 June 2022, Porto, Portugal}, pages = {654}, language = {en} } @misc{MelznerDendorfer, author = {Melzner, Maximilian and Dendorfer, Sebastian}, title = {Biomechanik und muskuloskeletale Simulation}, series = {Jahreskongress des ISPO Deutschland e.V., 2./3. Juni 2022, Hedelberg}, journal = {Jahreskongress des ISPO Deutschland e.V., 2./3. Juni 2022, Hedelberg}, organization = {International Society for Prosthetics and Orthotics}, language = {de} } @misc{EgerBergstraesserDendorferetal., author = {Eger, Maximilian and Bergstraesser, Marcel and Dendorfer, Sebastian and Lenich, Andreas and Pfeifer, Christian}, title = {Influence of radial head prosthetic design on humeroradial stability: Validation of a test rig therefore}, series = {DOKU2022, Deutscher Kongress f{\"u}r Orthop{\"a}die und Unfallchirurgie, 25.-28. 10.2022, Berlin}, journal = {DOKU2022, Deutscher Kongress f{\"u}r Orthop{\"a}die und Unfallchirurgie, 25.-28. 10.2022, Berlin}, publisher = {German Medical Science GMS Publishing House}, address = {D{\"u}sseldorf}, doi = {10.3205/22dkou611}, url = {http://nbn-resolving.de/urn:nbn:de:0183-22dkou6115}, language = {en} } @misc{Dendorfer, author = {Dendorfer, Sebastian}, title = {KI-basierte mechanische Modelle f{\"u}r Pr{\"a}vention, Diagnostik und Rehabilitation}, series = {Serien-Webmeeting zu AI - KI-basierte Bildanalyse zur computer-unterst{\"u}tzten Frakturerkennung, 09.11.22}, journal = {Serien-Webmeeting zu AI - KI-basierte Bildanalyse zur computer-unterst{\"u}tzten Frakturerkennung, 09.11.22}, organization = {Deutsche Gesellschaft f{\"u}r Orthop{\"a}die und Orthop{\"a}dische Chirurgie}, language = {de} } @misc{BirkenmaierKrenkelLehle, author = {Birkenmaier, Clemens and Krenkel, Lars and Lehle, Karla}, title = {Linking flow conditions in membrane oxygenators to arrangements of multimeric von-Willebrand-factor as indication for coagulation}, series = {World Congress of Biomechanics 2018, Convention Centre Dublin, 8.-12. Juli 2018}, journal = {World Congress of Biomechanics 2018, Convention Centre Dublin, 8.-12. Juli 2018}, abstract = {Introduction Shear induced multimerisation of von-Willebrand-factor (vWF) is supposed to play an important role in coagulation inside extracorporeal membrane oxygenators. However, there is no proof that links observed vWF structures to computed or measured flow conditions. Methods The structures of multimeric vWF fibers, observed in clinically used membrane oxygenators is examined using immunofluorescence microscopy (IFM) using Carstairs' staining method (positive ethics committee vote). The flow around the membrane fibres inside the oxygenator is investigated in terms of shear rate, wall shear velocity and streamlines by using CFD (RANS, Carreau-Yasuda viscosity, geometry remodelled after high-resolution µCT-scans). By interpreting the histological and numerical results in this common context, indications for shear induced coagulation mechanisms can be identified. Results The fibre structures of multimeric vWF build regular but not exactly symmetric formations around the contact face (CF) between the crosswise stacked oxygenator fibres (OF), see fig.1B, vWF marked red. Annular around the CF arranged, cells are likely to be found, see fig.1B, nuclei marked blue. The computed streamlines around the OF show attached flow around the circular fibres. However, the irregular arrangement of real OF produce considerable cross flow between the interconnected neighbouring channels, in contrast to previous 2D-simulations. Thus, the CF are washed around closely by blood, also from neighbouring channels. The wall shear velocity streamlines form regular, slightly asymmetric shapes around the contact faces. The occurring maximum shear rates are in the range of 1,000 1/s. Discussion The shapes of vWF structures found in clinically used oxygenators match the computational results in terms of wall shear velocity and streamlines well. The accumulation of cells close to the CF can also be explained by fluid mechanics, as there are small shear gradients and slow velocities. However, occurring shear rates between OFs are too low to trigger multimerisation of vWF. That raises the question where in the circuit the actual activation of vWF is started and how, at least partly chained, vWF multimeres are attracted towards the OF surface. A next step will be the investigation of the actual shear rate triggered (or mediated) multimerisation of vWF. Towards this end, microfluidic experiments with shear triggered coagulation will be performed. Also of big interest is the computation of the flow situation in the oxygenator in proximity to chaining threads, which have been ignored in computations so far. However, first a realistic representation of the effective viscosity in computations is needed, which is not available yet.}, language = {en} } @misc{KoeglerIsmailRusavyetal., author = {K{\"o}gler, Michael and Ismail, Khaled M. and Rusavy, Zdenek and Kalis, Vladimir and S{\"u}ß, Franz and Dendorfer, Sebastian}, title = {Influence of bed height and stance on accoucheurs lower back and glenohumeral load during simulated childbirth}, series = {31st meeting of Czech Urogynaecological Society, Prague, 2022}, journal = {31st meeting of Czech Urogynaecological Society, Prague, 2022}, language = {en} }