@article{KielTrinschekKuchmizhaketal.2024, author = {Kiel, Frederik and Trinschek, Sarah and Kuchmizhak, Aleksandr and Gurevich, Evgeny}, title = {Colouration of diamond surfaces by laser-induced periodic surface structuring}, series = {Optics \& Laser Technology}, journal = {Optics \& Laser Technology}, number = {168}, doi = {10.1016/j.optlastec.2023.109882}, pages = {109882}, year = {2024}, language = {en} } @article{Morawetz2024, author = {Morawetz, Klaus}, title = {Time behavior of hubble parameter by torsion}, series = {Modern Physics Letters A}, volume = {Vol. 39}, journal = {Modern Physics Letters A}, number = {No. 3}, doi = {10.1142/S0217732323501924}, pages = {2350192-1 -- 2350192-10}, year = {2024}, abstract = {Consequences of the consistent exact solution of Einstein{Cartan equation on the time dependence of Hubble parameter are discussed. The torsion leads to a space and time-dependent expansion parameter which results into nontrivial windows of Hubble parameter between diverging behavior. Only one window shows a period of decreasing followed by increasing time dependence. Provided a known cosmological constant and the present values of Hubble and deceleration parameter this changing time can be given in the past as well as the ending time of the windows or universe. The comparison with the present experimental data allows to determine all parameters of the model. Large-scale spatial periodic structures appear. From the metric with torsion outside matter, it is seen that torsion can feign dark matter.}, language = {en} } @inproceedings{SchroeerHinricherIbenthaletal.2023, author = {Schr{\"o}er, C. and Hinricher, N. and Ibenthal, I. and M{\"u}ller, L. and Backhaus, C.}, title = {Expertenevaluation der ergonomischen und sicherheitstechnischen Gestaltung von Krankenhausbetten}, series = {Beitrag zum 69. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 69. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {St. Augustin}, year = {2023}, language = {de} } @inproceedings{IbenthalHinricherBackhaus2023, author = {Ibenthal, E. and Hinricher, N. and Backhaus, C.}, title = {Pr{\"a}valenz des Karpaltunnelsyndroms bei Pflegekr{\"a}ften in der Dialyse}, series = {Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, booktitle = {Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, year = {2023}, language = {de} } @inproceedings{SiebersFrankeBackhaus2023, author = {Siebers, S. and Franke, A. and Backhaus, C.}, title = {L{\"a}rm im Krankenhaus - Spitzenschalldruckpegel bei der Bedienung von Krankenhausbetten}, series = {Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, booktitle = {Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, year = {2023}, language = {de} } @inproceedings{SchroeerHinricherIbenthaletal.2023, author = {Schr{\"o}er, C. and Hinricher, N. and Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Untersuchung des Einflusses einer f{\"u}nften Rolle und des Rollendurchmessers auf die ben{\"o}tigte Kraft zum Schieben von Krankenhausbetten}, series = {Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, booktitle = {Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, year = {2023}, language = {de} } @inproceedings{MuellerHinricherSchroeeretal.2023, author = {M{\"u}ller, L. and Hinricher, N. and Schr{\"o}er, C. and Louw, J. and Ibenthal, I. and Backhaus, C.}, title = {Das Krankenhausbett als Hilfsmittel zur Patientenmobilisation}, series = {Beitrag zum 69. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, volume = {St. Augustin}, booktitle = {Beitrag zum 69. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, year = {2023}, language = {de} } @inproceedings{HinricherSchroeerIbenthaletal.2023, author = {Hinricher, N. and Schr{\"o}er, C. and Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Einfluss einer 5. Rolle auf die Wirbels{\"a}ulenkompressionskr{\"a}fte beim Schieben und Ziehen von Krankenhausbetten}, series = {Beitrag zum 69. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 69. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {St. Augustin}, year = {2023}, language = {de} } @article{HomrighausenHorsthemkePogorzelskietal.2023, author = {Homrighausen, Jonas and Horsthemke, Ludwig and Pogorzelski, Jens and Trinschek, Sarah and Gl{\"o}sek{\"o}tter, Peter and Gregor, Markus}, title = {Edge-Machine-Learning-Assisted Robust Magnetometer Based on Randomly Oriented NV-Ensembles in Diamond}, series = {Sensors}, volume = {23}, journal = {Sensors}, number = {3}, doi = {10.3390/s23031119}, year = {2023}, abstract = {Quantum magnetometry based on optically detected magnetic resonance (ODMR) of nitrogen vacancy centers in nano- or micro-diamonds is a promising technology for precise magnetic-field sensors. Here, we propose a new, low-cost and stand-alone sensor setup that employs machine learning on an embedded device, so-called edge machine learning. We train an artificial neural network with data acquired from a continuous-wave ODMR setup and subsequently use this pre-trained network on the sensor device to deduce the magnitude of the magnetic field from recorded ODMR spectra. In our proposed sensor setup, a low-cost and low-power ESP32 microcontroller development board is employed to control data recording and perform inference of the network. In a proof-of-concept study, we show that the setup is capable of measuring magnetic fields with high precision and has the potential to enable robust and accessible sensor applications with a wide measuring range.}, language = {en} } @article{HerbstMuhmannRaschkeetal.2023, author = {Herbst, Elmar and Muhmann, Raphael J. and Raschke, Michael J. and Katthagen, J. Christoph and Oeckenp{\"o}hler, Simon and Wermers, Jens and Glasbrenner, Johannes and Robinson, James R. and Kittl, Christoph}, title = {The Anterior Fibers of the Superficial MCL and the ACL Restrain Anteromedial Rotatory Instability}, series = {The American Journal of Sports Medicine}, journal = {The American Journal of Sports Medicine}, doi = {10.1177/03635465231187043}, year = {2023}, language = {en} } @article{KatthagenWermersPausetal.2023, author = {Katthagen, J. Christoph and Wermers, Jens and Paus, Christoph and Michel, Philipp A. and K{\"o}hler, Alina and Schliemann, Benedikt and Raschke, Michael J.}, title = {The long head of the biceps has a stabilizing effect on the glenohumeral joint in simulated infraspinatus or subscapularis but not supraspinatus rotator cuff deficiency - a biomechanical study}, series = {Arthroscopy: The Journal of Arthroscopic \& Related Surgery}, journal = {Arthroscopy: The Journal of Arthroscopic \& Related Surgery}, doi = {10.1016/j.arthro.2023.08.018}, year = {2023}, language = {en} } @article{CarlHochmann2023, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {Impact of the new European medical device regulation: a two-year comparison}, series = {Biomedical Engineering / Biomedizinische Technik}, journal = {Biomedical Engineering / Biomedizinische Technik}, issn = {1862-278X}, doi = {10.25974/fhms-17381}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-173816}, year = {2023}, abstract = {Objectives: In recent years, the European Union has revised its regulatory framework for medical devices, primarily to improve patient safety and public health. The Medical Device Regulation (MDR) is fully applicable since May 2021, strengthening the requirements for all stakeholders. As a result, many companies are facing enormous challenges. The aim of this study was to assess the impact of the MDR on the orthopaedic aids industry. Methods: Two surveys were conducted: one shortly before the MDR became applicable (146 respondents) and a second survey almost two years later (233 respondents). Results: Both surveys revealed that all businesses in the orthopaedic aids sector, regardless of size, have difficulty implementing the MDR. Key challenges include additional workload for technical documentation, increased resource expenditure and cost, and lack of clarity regarding the new requirements. Many companies are downsizing their product portfolio, resulting in potential supply shortages and a loss of competitive advantage and innovation for the medical device industry in Europe. Conclusions: The full extent of the MDR's impact on clinical practice is still unclear. However, many companies lack the necessary resources. The MDR can potentially be a bottleneck in the availability of medical devices.}, language = {en} } @inproceedings{CarlKirillovHochmannetal.2023, author = {Carl, Ann-Kathrin and Kirillov, Maxim and Hochmann, David and Quadrat, Eric}, title = {Towards credible computational models: Application of a risk-based framework for establishing credibility}, series = {Transactions on Additive Manufacturing Meets Medicine}, booktitle = {Transactions on Additive Manufacturing Meets Medicine}, issn = {2699-1977}, doi = {10.25974/fhms-17382}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-173821}, year = {2023}, abstract = {The use of computational modeling and simulation (CMS) as a tool for gaining insight into the technical performance and safety of medical devices has emerged continuously over the past years. However, to rely on information and decisions derived from model predictions, it is essential to establish model credibility for the specific context of use. Limited regulatory requirements and lack of consensus on the level of verification and validation activities required result in rare use of CMS as a source of evidence in the medical device approval process. The American Society of Mechanical Engineers (ASME) developed a risk-informed framework to establish appropriate credibility requirements of a computational model: the ASME V\&V 40?2018 standard. This paper aims to outline the concepts of this standard and to demonstrate its application using an example from the orthotics field. The necessary steps to establish model credibility for a custom?made 3D printed wrist hand orthosis (WHO) are presented. It is shown that the credibility requirements of each verification and validation activity depend on model risk by applying two different contexts of use to the same computational model.}, language = {en} } @article{Carl2023, author = {Carl, Ann-Kathrin}, title = {Umfrage der FH M{\"u}nster zu zwei Jahren MDR in der Hilfsmittelbranche. Wie steht's um die Praxistauglichkeit?}, series = {MTD Medizintechnischer Dialog}, volume = {49}, journal = {MTD Medizintechnischer Dialog}, number = {7}, issn = {0935-137X}, pages = {6 -- 8}, year = {2023}, language = {de} } @article{Morawetz2023, author = {Morawetz, Klaus}, title = {Extended quasiparticle Pad{\´e} approximation for non-Fermi liquids}, doi = {10.25974/fhms-17712}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-177120}, pages = {1 -- 16}, year = {2023}, abstract = {The extended quasiparticle picture is adapted to non-Fermi systems by suggesting a Pad´e approximation which interpolates between the known small scattering-rate expansion and the deviation from the Fermi energy. The first two energy-weighted sum rules are shown to be fulfilled independent of the interpolating function for any selfenergy. For various models of one-dimensional Fermions scattering with impurities the quality of the Pad´e approximation for the spectral function is demonstrated and the reduced density matrix or momentum distribution is reproduced not possessing a jump at the Fermi energy. Though the two-fold expansion is necessary to realize the spectral function and reduced density, the extended quasiparticle approximation itself is sufficient for the description of transport properties due to cancellation of divergent terms under integration. The T-matrix approximation leads to the delay time as the time two particles spend in a correlated state. This contributes to the reduced density matrix and to an additional part in the conductivity which is presented at zero and finite temperatures. Besides a localization at certain impurity concentrations, the conductivity shows a maximum at small temperatures interpreted as onset of superconducting behaviour triggered by impurities. The Tan contact reveals the same universal behaviour as known from electron-electron scattering.}, language = {en} } @article{MorawetzTrinschekGurevich2022, author = {Morawetz, Klaus and Trinschek, Sarah and Gurevich, Evgeny}, title = {Interplay of viscosity and surface tension for ripple formation by laser melting}, series = {Physical Review B}, volume = {105}, journal = {Physical Review B}, number = {3}, doi = {10.1103/PhysRevB.105.035415}, pages = {035415}, year = {2022}, language = {de} } @article{BobkovaTrinschekOtteetal.2022, author = {Bobkova, Valeriia and Trinschek, Sarah and Otte, Eileen and Denz, Cornelia}, title = {Analyzing light-structuring features of droplet lenses on liquid-repelling surfaces}, series = {Optics Express}, volume = {30}, journal = {Optics Express}, number = {4}, doi = {10.1364/OE.444777}, pages = {5937 -- 5952}, year = {2022}, language = {en} } @article{OtteBobkovaTrinscheketal.2022, author = {Otte, Eileen and Bobkova, Valeria and Trinschek, Sarah and Rosales-Guzm{\´a}n, Carmelo and Denz, Cornelia}, title = {Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light}, series = {APL Photonics}, volume = {2022}, journal = {APL Photonics}, number = {7}, doi = {10.1063/5.0086536}, pages = {086105}, year = {2022}, abstract = {Light fields carrying orbital angular momentum (OAM) offer a broad variety of applications in which especially an accurate determination of the respective OAM spectrum, i.e., unraveling the content of OAM by its topological charge ℓ, has become a main subject. Even though various techniques have been proposed to measure the OAM spectrum of such modes, many of them fail if optical vortices have to be considered in perturbed or dynamically changing experimental systems. Here, we put forward a novel technique capable of determining the OAM spectrum of light by a single measurement shot, which specifically applies to those fields that have been distorted. Experimentally, our technique only requires to interfere the perturbed light field with a reference field. From the resulting intensity pattern, the accurate OAM spectrum is determined in an all-digital way. We demonstrate our novel approach by numerical simulations and a proof-of-concept experiment employing a model ball lens as an exemplary disturbing object.}, language = {en} } @inproceedings{SchroeerHinricherIbenthaletal.2022, author = {Schr{\"o}er, C. and Hinricher, N. and Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Messtechnische Analyse der Belastung des Hand-Arm-Systems durch Drehmomente beim Aufr{\"u}sten von H{\"a}modialyseger{\"a}ten}, series = {Beitrag zum 68. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 68. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {St. Augustin}, isbn = {978-3-936804-31-7}, pages = {A.4.5}, year = {2022}, language = {de} } @inproceedings{LouwSchroeerHinricheretal.2022, author = {Louw, J. and Schr{\"o}er, C. and Hinricher, N. and Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Anwenderakzeptanz von H{\"a}modialyseger{\"a}ten}, series = {Beitrag zum 68. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 68. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {St. Augustin}, isbn = {978-3-936804-31-7}, pages = {C.9.5}, year = {2022}, language = {de} } @inproceedings{MuellerHinricherIbenthaletal.2022, author = {M{\"u}ller, L. and Hinricher, N. and Ibenthal, E. and Backhaus, C.}, title = {Ber{\"u}cksichtigung messtechnisch erhobener Muskel-Skelett-Belastungen bei Kaufentscheidungen in Gesundheitseinrichtungen}, series = {Beitrag zum 68. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 68. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {St. Augustin}, isbn = {978-3-936804-31-7}, pages = {B.5.3}, year = {2022}, language = {de} } @inproceedings{SchroeerHinricherIbenthaletal.2022, author = {Schr{\"o}er, C. and Hinricher, N. and Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Messtechnische Analyse der Belastung des Hand-Arm-Systems durch Druckkr{\"a}fte beim Aufr{\"u}sten von H{\"a}modialyseger{\"a}ten}, series = {Beitrag zur 62. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, booktitle = {Beitrag zur 62. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, isbn = {978-3-9823608-3-6}, pages = {978-3-9823608-3-6}, year = {2022}, language = {de} } @inproceedings{KleyerHinricherIbenthaletal.2022, author = {Kleyer, J. and Hinricher, N. and Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Messtechnische Analyse der K{\"o}rperhaltung und -bewegung beim Aufr{\"u}sten von H{\"a}modialyseger{\"a}ten}, series = {Beitrag zur 62. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, booktitle = {Beitrag zur 62. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft f{\"u}r Arbeitsmedizin und Umweltmedizin}, isbn = {978-3-9823608-3-6}, year = {2022}, language = {de} } @article{MuellerKehmannSiebersetal.2022, author = {M{\"u}ller, D. and Kehmann, M. and Siebers, S. and Backhaus, C.}, title = {Rasterelektronenmikroskopische Untersuchung zum Verschleiß des Membranmaterials von Oxygenatoren nach Langzeitanwendung}, series = {Kardiotechnik}, volume = {31}, journal = {Kardiotechnik}, number = {4}, doi = {10.47624/kt.031.EZCZ3563}, pages = {141 -- 145}, year = {2022}, language = {de} } @inproceedings{BackhausSiebers2022, author = {Backhaus, C. and Siebers, S.}, title = {Work-related noise exposure in a neonatal intensive care unit - stressful work activities and diurnal rhythmic variations}, series = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices}, volume = {51}, booktitle = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices}, doi = {10.54941/ahfe1002129}, pages = {286 -- 292}, year = {2022}, language = {en} } @inproceedings{MuellerHinricherGersieetal.2022, author = {M{\"u}ller, L. and Hinricher, N. and Gersie, J. and Backhaus, C.}, title = {Prototype of a Piece of Clothing for Patients for Quick and Easy Patient Mobilizations in Healthcare Facilities}, series = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices}, volume = {51}, booktitle = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices}, doi = {10.54941/ahfe1002122}, pages = {230 -- 238}, year = {2022}, language = {en} } @inproceedings{IbenthalBackhaus2022, author = {Ibenthal, E. and Backhaus, C.}, title = {Reducing work-related stress in nursing when dealing with people with dementia through music intervention - which factors are relevant?}, series = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices}, volume = {38}, booktitle = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices}, doi = {10.54941/ahfe1001661}, pages = {34 -- 41}, year = {2022}, language = {en} } @inproceedings{HinricherSchroeerBackhaus2022, author = {Hinricher, N. and Schr{\"o}er, C. and Backhaus, C.}, title = {Design of control elements in virtual reality - investigation of factors influencing operating efficiency, user experience and presence}, series = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Human Factors in Virtual Environments and Game Design}, volume = {50}, booktitle = {Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Human Factors in Virtual Environments and Game Design}, doi = {10.54941/ahfe1002066}, pages = {100 -- 109}, year = {2022}, language = {en} } @inproceedings{IbenthalHinricherBackhaus2022, author = {Ibenthal, E. and Hinricher, N. and Backhaus, C.}, title = {Feasibility of a tracking system for hospital beds to improve work processes of nurses}, series = {Contribution to the 11th International Working on Safety Net Conference in Algarve/Portugal. ID1080}, booktitle = {Contribution to the 11th International Working on Safety Net Conference in Algarve/Portugal. ID1080}, year = {2022}, language = {en} } @article{BackhausCarlSiebersetal.2022, author = {Backhaus, C. and Carl, A. and Siebers, S. and Urlichs, F.}, title = {L{\"a}rmbelastung einer neonatalen Intensivstation - Gibt es einen Tag-Nacht-Unterschied der Schallexposition?}, series = {Zentralbl. Arbeitsmed.}, volume = {73}, journal = {Zentralbl. Arbeitsmed.}, doi = {10.1007/s40664-022-00486-6}, pages = {24 -- 31}, year = {2022}, language = {de} } @article{PeezWermersGlasbrenneretal.2022, author = {Peez, Christian and Wermers, Jens and Glasbrenner, Johannes and Briese, Thorben and Raschke, Michael J. and Herbst, Elmar and Kittl, Christoph}, title = {Qualitative and Quantitative Assessment of the Medial Patellar Retinaculum Anatomy: the Anteromedial Side of the Knee Revisited}, series = {Orthopaedic Journal of Sports Medicine}, volume = {10}, journal = {Orthopaedic Journal of Sports Medicine}, number = {11}, doi = {10.1177/23259671221134818}, year = {2022}, language = {en} } @article{KatthagenSussiekFranketal.2022, author = {Katthagen, J. Christoph and Sußiek, Julia and Frank, Andre and Wermers, Jens and Schliemann, Benedikt and Raschke, Michael J.}, title = {Double plating is associated with higher fixation strength than single plating in osteoporotic fractures of the scapular spine: a biomechanical study}, series = {Archives of Orthopaedic and Trauma Surgery}, volume = {142}, journal = {Archives of Orthopaedic and Trauma Surgery}, number = {8}, issn = {1434-3916}, doi = {10.1007/s00402-021-03879-z}, pages = {1859 -- 1864}, year = {2022}, language = {en} } @article{HeilmannSussiekRaschkeetal.2022, author = {Heilmann, Lukas F. and Sußiek, Julia and Raschke, Michael J. and Langer, Martin F. and Frank, Andre and Wermers, Jens and Michel, Philipp A. and Dyrna, Felix and Schliemann, Benedikt and Katthagen, J. Christoph}, title = {Biomechanical Analysis of Coracoid Stability After Coracoplasty: How Low Can You Go?}, series = {Orthopaedic Journal of Sports Medicine}, volume = {10}, journal = {Orthopaedic Journal of Sports Medicine}, number = {2}, issn = {2325-9671}, doi = {10.1177/23259671221077947}, year = {2022}, language = {en} } @article{BehrendtHerbstRobinsonetal.2022, author = {Behrendt, Peter and Herbst, Elmar and Robinson, James R. and von Negenborn, Leslie and Raschke, Michael J. and Wermers, Jens and Glasbrenner, Johannes and Fink, Christian and Herbort, Mirco and Kittl, Christoph}, title = {The Control of Anteromedial Rotatory Instability Is Improved With Combined Flat sMCL and Anteromedial Reconstruction}, series = {The American Journal of Sports Medicine}, volume = {50}, journal = {The American Journal of Sports Medicine}, number = {8}, issn = {1552-3365}, doi = {10.1177/03635465221096464}, pages = {2093 -- 2101}, year = {2022}, language = {en} } @article{SussiekWermersRaschkeetal.2022, author = {Sußiek, Julia and Wermers, Jens and Raschke, Michael J. and Herbst, Elmar and Dyrna, Felix and Riesenbeck, Oliver and Katthagen, J. Christoph}, title = {Acromioclavicular and coracoclavicular ligamentous insertion distances depend on the scapular tilt and decrease with anterior direction of the inferior scapula angle}, series = {Knee Surgery, Sports Traumatology, Arthroscopy}, journal = {Knee Surgery, Sports Traumatology, Arthroscopy}, issn = {1433-7347}, doi = {10.1007/s00167-022-07126-9}, year = {2022}, language = {de} } @article{DeichselRaschkeHerbstetal.2022, author = {Deichsel, Adrian and Raschke, Michael J. and Herbst, Elmar and Peez, Christian and Oeckenp{\"o}hler, Simon and Briese, Thorben and Wermers, Jens and Kittl, Christoph and Glasbrenner, Johannes}, title = {The Biomechanical Stability of Bone Staples in Cortical Fixation of Tendon Grafts for Medial Collateral Ligament Reconstruction Depends on the Implant Design}, series = {The American Journal of Sports Medicine}, volume = {50}, journal = {The American Journal of Sports Medicine}, number = {14}, issn = {1552-3365}, doi = {10.1177/03635465221130753}, pages = {3827 -- 3831}, year = {2022}, language = {en} } @article{CarlHochmann2022, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {Regulatorische Anforderungen an Computergest{\"u}tzte Modellierung und Simulation}, series = {mt-medizintechnik}, volume = {142}, journal = {mt-medizintechnik}, number = {4}, issn = {0344-9416}, pages = {14 -- 18}, year = {2022}, abstract = {Die computergest{\"u}tzte Modellierung und Simulation (CMS) ist in vielen Bereichen der Industrie g{\"a}ngige Praxis und hat das Potenzial die Medizintechnikbranche zu revolutionieren. Die Markteinf{\"u}hrung neuer Produkte kann erheblich beschleunigt und entstehende Kosten k{\"o}nnen reduziert werden, ohne die Patientensicherheit negativ zu beeinflussen. Dennoch beruhen die Entwicklungs- und Zulassungsprozesse in der Medizintechnik bis dato {\"u}berwiegend auf experimentell ermittelten Daten, was in Europa unter anderem auf die bestehenden regulatorischen Unsicherheiten zur{\"u}ckzuf{\"u}hren ist. Verglichen mit der FDA hat die EU-Kommission die M{\"o}glichkeiten der CMS bisher nicht erkannt - es fehlt an rechtlichen Vorgaben. Der folgende Artikel soll daher eine {\"U}bersicht der aktuellen regulatorischen Situation bieten.}, language = {de} } @inproceedings{CarlHochmann2022, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {Aktueller Stand der regulatorischen Vorgaben f{\"u}r 3D-gedruckte Sonderanfertigungen in Europa}, series = {Beitrag zur OTWorld 2022}, booktitle = {Beitrag zur OTWorld 2022}, year = {2022}, language = {de} } @incollection{CarlHochmann2022, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {In-silico Methoden im Zulassungsprozess. Regulatorische Anforderungen an computergest{\"u}tzte Modellierung und Simulation}, series = {Medizinprodukte planen, entwickeln, realisieren. Der CE-Routenplaner}, booktitle = {Medizinprodukte planen, entwickeln, realisieren. Der CE-Routenplaner}, publisher = {T{\"U}V Media GmbH T{\"U}V Rheinland Group}, address = {K{\"o}ln}, isbn = {978-3-7406-0716-6}, publisher = {FH M{\"u}nster - University of Applied Sciences}, pages = {1 -- 15}, year = {2022}, abstract = {Die computergest{\"u}tzte Modellierung und Simulation (CMS) ist in vielen Bereichen der Industrie g{\"a}ngige Praxis und hat das Potenzial, die Medizintechnikbranche zu revolutionieren. Die Markteinf{\"u}hrung neuer Produkte kann erheblich beschleunigt und entstehende Kosten k{\"o}nnen reduziert werden, ohne die Patientensicherheit negativ zu beeinflussen. Dennoch beruhen die Entwicklungs- und Zulassungsprozesse in der Medizintechnik bis dato {\"u}berwiegend auf experimentell ermittelten Daten, was in Europa unter anderem auf die bestehenden regulatorischen Unsicherheiten zur{\"u}ckzuf{\"u}hren ist. Verglichen mit der FDA hat die EU-Kommission die M{\"o}glichkeiten der CMS bisher nicht erkannt - es fehlt an rechtlichen Vorgaben. Der folgende Artikel soll daher eine {\"U}bersicht der aktuellen regulatorischen Situation bieten.}, language = {de} } @article{CarlHochmann2022, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {Comparison of the regulatory requirements for custom-made medical devices using 3D printing in Europe, the United States, and Australia}, series = {Biomedical Engineering / Biomedizinische Technik}, volume = {67}, journal = {Biomedical Engineering / Biomedizinische Technik}, number = {6}, issn = {1862-278X}, doi = {10.1515/bmt-2021-0266}, pages = {61 -- 69}, year = {2022}, abstract = {Additive manufacturing (AM) has continuously grown in recent decades. Enhanced quality, further development of technology, and fall in prices make AM applicable and capable for various industrial applications, also for the manufacture of medical devices. 3D printing offers the possibility for an unprecedented adaptation to the anatomy of each patient, generating medical devices on a case-by-case basis. In many jurisdictions, custom-made devices qualify for an exemption to pre-market approval standards. This regulation is called into question by new technologies, like AM. Therefore, this article compares the current regulatory requirements for custom-made devices in Europe, the United States, and Australia and discusses the impact on 3D printed devices. It concludes that not all jurisdictions have yet adjusted their regulatory framework for custom-made devices to technological advances. Remaining uncertainties must be eliminated in order to help manufacturers comply with the regulatory requirements, emphasizing key aspects of AM.}, language = {en} } @article{DobbelsteinGeorgeGurevichetal.2021, author = {Dobbelstein, Henrik and George, Easo P and Gurevich, Evgeny L and Kostka, Aleksander and Ostendorf, Andreas and Laplanche, Guillaume}, title = {Laser metal deposition of refractory high-entropy alloys for high-throughput synthesis and structure-property characterization}, series = {International Journal of Extreme Manufacturing}, volume = {3}, journal = {International Journal of Extreme Manufacturing}, number = {1}, publisher = {IOP Publishing}, pages = {015201 -- 015201}, year = {2021}, abstract = {Progress in materials development is often paced by the time required to produce and evaluate a large number of alloys with different chemical compositions. This applies especially to refractory high-entropy alloys (RHEAs), which are difficult to synthesize and process by conventional methods. To evaluate a possible way to accelerate the process, high-throughput laser metal deposition was used in this work to prepare a quinary RHEA, TiZrNbHfTa, as well as its quaternary and ternary subsystems by in-situ alloying of elemental powders. Compositionally graded variants of the quinary RHEA were also analyzed. Our results show that the influence of various parameters such as powder shape and purity, alloy composition, and especially the solidification range, on the processability, microstructure, porosity, and mechanical properties can be investigated rapidly. The strength of these alloys was mainly affected by the oxygen and nitrogen contents of the starting powders, while substitutional solid solution strengthening played a minor role.}, language = {en} } @article{TrinschekVorholtWittrock2021, author = {Trinschek, Sarah and Vorholt, Christian and Wittrock, Ulrich}, title = {Nonlinear dynamics in intra-cavity pumped thin-disk lasers}, series = {Optics Express}, volume = {29}, journal = {Optics Express}, number = {4}, doi = {https://doi.org/10.1364/OE.417154}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-132355}, pages = {5755 -- 5773}, year = {2021}, abstract = {Cross-saturation of the gain media in intra-cavity pumped lasers leads to complex dynamics of the laser power. We present experimental results and a detailed theoretical analysis of this nonlinear dynamics for an intra-cavity pumped Yb:YAG thin-disk laser in the framework of a rate-equation model. The gain medium of this laser is residing in the resonator of a conventional, diode-pumped Yb:YAG thin-disk laser. Continuous-wave operation, periodic pulse trains, and chaotic fluctuations of the optical power of both lasers were observed. The dynamics is not driven by external perturbations but arises naturally in this laser system. Further examination revealed that these modes of operation can be controlled by the resonator length of the diode-pumped laser but that the system can also show hysteresis and multi-stability.}, language = {en} } @article{PuesLaubeFischeretal.2021, author = {Pues, Patrick and Laube, Michael and Fischer, Stefan and Schr{\"o}der, Franziska and Schwung, Sebastian and Rytz, Daniel and Fiehler, Torben and Wittrock, Ulrich and J{\"u}stel, Thomas}, title = {Luminescence and up-conversion of single crystalline Lu3Al5O12:Pr3+}, series = {Journal of Luminescence}, volume = {234}, journal = {Journal of Luminescence}, doi = {10.1016/j.jlumin.2021.117987}, pages = {117987 -- 117995}, year = {2021}, abstract = {This work deals with the spectroscopic properties of praseodymium doped single crystalline lutetium aluminum garnet (LuAG:Pr3+). A special focus was set on temperature- and time-dependent spectroscopy. Beyond the well-known down-conversion luminescence of LuAG:Pr3+, also UV-A/B up-conversion luminescence under excitation with a 488 nm laser was thoroughly investigated. Furthermore, the results of the spectroscopic investigations on the single crystalline material were supplemented and compared with measurements on a microscale powder sample. In addition, to the spectroscopic investigations, mechanistic considerations are presented to obtain a closer look at the up-conversion process in LuAG:Pr3+. We promote the thesis of a temperature-dependent energy transfer up-conversion mechanism.}, language = {en} } @article{WangNettGurevichetal.2021, author = {Wang, Hao and Nett, Ralf and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser}, series = {Applied Sciences}, volume = {11}, journal = {Applied Sciences}, number = {2}, doi = {10.3390/app11020515}, pages = {515}, year = {2021}, abstract = {The laser nitriding was performed in nitrogen gas at room temperature (20 °C) and low temperature (-190 °C) by a low power fiber laser to modify the wear and abrasion resistance of NiTi alloy. The surface roughness and element composition were analyzed by roughness device and energy-dispersive X-ray spectroscopy respectively. The results of roughness show that laser treatment can change the surface roughness due to the laser remelting. The effect of laser nitriding on the microhardness, friction coefficient, and worn scars of NiTi alloy was also studied, which shows that the microhardness of the NiTi alloy increases after laser nitriding. The optical microscope and scanning electron microscope were used to characterize the surface of NiTi alloy after wear testing to observe the microstructure of worn scars. The results show that the laser nitriding with different parameters can induce a nitride layer with different thicknesses and the higher energy deposition is the key factor for the formation of the nitride layer, which can decrease the friction coefficient and reduce wear loss during the application of NiTi alloy. The improvement of wear resistance can be attributed to the hard nitriding layer.}, language = {en} } @article{KasischkeHartmannNiermannetal.2021, author = {Kasischke, Maren and Hartmann, Simon and Niermann, Kevin and Kostyrin, Denis and Thiele, Uwe and Gurevich, Evgeny L}, title = {Pattern Formation in Slot-Die Coating}, series = {arXiv.org}, volume = {2021}, journal = {arXiv.org}, pages = {1 -- 24}, year = {2021}, abstract = {We experimentally study the occurrence of pattern formation during the slot-die coating of low-viscosity nearly Newtonian liquids onto Polyethylenterephthalat (PET)-substrates. In particular, it is demonstrated that with increase of the coating speed a homogeneous coating becomes unstable with respect to periodic stripe patterns. Thereby, depending on the liquid viscosity, the stripes can be oriented parallel or perpendicular with respect to the coating direction. Mixed states do also occur. The spatial period of perpendicular [parallel] stripes increases [decrease] with the coating speed. The dependence of the effect on various control parameters of slot-die coating is investigated. Finally, a simple theoretical model based on the hydrodynamics of thin films of partially wetting liquids is analysed. Comparing the results to the experiments, conclusions are drawn regarding the acting instability and pattern formation mechanisms.}, language = {en} } @inproceedings{WangGurevichOstendorf2021, author = {Wang, Hao and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Application of nanoindentation technique to test surface hardness and residual stress of NiTi alloy after femtosecond laser shock peening}, series = {High-Power Laser Materials Processing: Applications, Diagnostics, and Systems X / SPIE.Digital.Library}, booktitle = {High-Power Laser Materials Processing: Applications, Diagnostics, and Systems X / SPIE.Digital.Library}, publisher = {International Society for Optics and Photonics}, address = {USA}, doi = {10.1117/12.2593092}, pages = {116790J-0 -- 116790J-5}, year = {2021}, abstract = {Laser shock peening is a new and important surface treatment technique that can enhance the mechanical properties of metal materials. Normally, the nanosecond laser with pulse-width between 5 ns and 20 ns is used to induce a high-pressure shock wave that can generate plastic deformation in the top layer of metals. The femtosecond laser shock peening in the air has been studied recently, which can induce higher pressure shock wave than that of traditional nanosecond laser shock peening in a very short time. The NiTi alloy is processed by femtosecond laser shock peening, then a nanoindentation device is used to measure its surface hardness and residual stress. The hardness results of NiTi alloy before and after treatment show that the femtosecond laser shock peening can increase the hardness of NiTi alloy, which also shows that the femtosecond laser can be used to perform laser shock peening on NiTi alloy without coating.}, language = {en} } @inproceedings{LeitzGerhardsVerpoortetal.2021, author = {Leitz, Sinje and Gerhards, Maximilian and Verpoort, Sven and Wittrock, Ulrich and Freudling, Maximilian and Grzesik, Andreas and Erhard, Markus and Hallibert, Pascal}, title = {Vibration and shock testing of a 50 mm aperture unimorph deformable mirror}, series = {Proceedings of the International Conference on Space Optics (ICSO)}, volume = {11852}, booktitle = {Proceedings of the International Conference on Space Optics (ICSO)}, organization = {ESA/ESTEC, Noordwijk}, doi = {10.25974/fhms-13740}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-137401}, pages = {118524N}, year = {2021}, abstract = {We present our latest results on a refined unimorph deformable mirror which was developed in the frame of the ESA GSTP activity "Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains". The identified baseline concept with the soft piezoceramic material PIC151 successfully sustained all vibration requirements (17.8 gRMS random and 20 g sine) and shock testing (300 g SRS). We cover the mirror design development which reduces the stress in the brittle piezo-ceramic by 90 \% compared to the design from a former GSTP activity. We briefly address the optical characterization of the deformable mirror, namely the achieved Zernike amplitudes as well as the unpowered surface deformation (1.7 µm) and active flattening (12.3 nmRMS). The mirror produces low-order Zernike modes with a stroke of several tens of micrometer over a correction aperture of 50 mm, which makes the mirror a versatile tool for space telescopes.}, language = {en} } @inproceedings{FreudlingGrzesikErhardetal.2021, author = {Freudling, Maximilian and Grzesik, Andreas and Erhard, Markus and Gerhards, Maximilian and Leitz, Sinje and Verpoort, Sven and Wittrock, Ulrich and Hallibert, Pascal}, title = {Space-qualified piezo based deformable mirror for future instruments with active optics}, series = {Proceedings of the International Conference on Space Optics (ICSO)}, volume = {11852}, booktitle = {Proceedings of the International Conference on Space Optics (ICSO)}, organization = {ESA/ESTEC, Noordwijk}, doi = {10.25974/fhms-13741}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-137410}, pages = {1185231-11}, year = {2021}, abstract = {This paper presents the results of the technology development project "Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains" conducted by OHB System AG together with its partner M{\"u}nster University of Applied Sciences (MUAS). The project was funded by ESA within their General Support Technology Programme (GSTP). We address in this paper mainly the definition, flow-down and verification of the requirements for the Deformable Mirror (DM). The requirements were derived from a set of real space mission applications. The deformation of the mirror is performed by piezo-ceramic actuators in an unimorph configuration. The finally developed DM is able produce Zernike modes with a stroke of several tens of µm over a clear optical aperture of 50 mm in diameter. It underwent successfully a full environmental qualification campaign including thermal cycling, shock- and vibration testing, as well as exposure to proton and γ-ray radiation. Thermal and performance tests were performed in the temperature range from 100 K to 300 K. Furthermore, the DM sustained all vibration (random 17.8 g RMS and sinus) and shock (300 g) testing. Thereby all criticalities which were identified a previous study have been overcome successfully. A Technology Readiness Level (TRL) of 5 is reached, as the component has been validated in relevant environment. Based on the high level of maturity, this deformable mirror is now ready for the incorporation in future flight instruments. The achieved TRL of 5 is sufficient for the status of a PDR at payload level and gives thus a very good basis for all kinds of potential B2, C/D payload developments.}, language = {en} } @article{Morawetz2021, author = {Morawetz, Klaus}, title = {Exploring Anomalies by Many-Body Correlations}, series = {PSS B}, journal = {PSS B}, publisher = {Wiley}, doi = {10.25974/fhms-14283}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-142836}, year = {2021}, abstract = {The quantum anomaly is written alternatively into a form violating conservation laws or as non-gauge invariant currents seen explicitly on the example of chiral anomaly. By reinterpreting the many-body averaging, the connection to Pauli-Villars regularization is established which gives the anomalous term a new interpretation as arising from quantum fluctuations by many-body correlations at short distances. This is exemplified using an effective many-body quantum potential which realizes quantum Slater sums by classical calculations. It is shown that these quantum potentials avoid the quantum anomaly but approach the same anomalous result by many-body correlations. Consequently, quantum anomalies might be a shortcut way of single-particle field theory to account for many-body effects. This conjecture is also supported since the chiral anomaly can be derived by a completely conserving quantum kinetic theory. A measure for the quality of quantum potentials is suggested to describe these quantum fluctuations in the mean energy. The derived quantum potentials might be used to describe quantum simulations in classical terms.}, language = {en} } @article{Morawetz2021, author = {Morawetz, KLaus}, title = {Consistent solution of Einstein-Cartan equations with torsion outside matter}, doi = {10.1088/1361-6382/ac2417}, year = {2021}, language = {en} } @article{SandtenBoeingHrinciusetal.2021, author = {Sandten, Christian Stefan and B{\"o}ing, Christian and Hrincius, Eike and Anhlan, Darisuren and Kreyenschmidt, Martin and Ludwig, Stephan and Mertins, Hans-Christoph and Mellmann, Alexander and Dworog, Andreas and Hanning, Stephanie and Kuennemann, Thilo and Niehues, Christopher and Schupp, Thomas and Stec, Edyta and Thume, Julius and Triphaus, Daniel and Wilkern, Markus and Uphoff, Holger and Z{\"u}ndorf, Josef and Jacobshagen, Anja}, title = {Decontamination of disposable respirators for reuse in a pandemic employing in-situ-generated peracetic acid}, series = {American Journal of Infection Control}, volume = {00 / 2021}, journal = {American Journal of Infection Control}, doi = {10.1016/j.ajic.2021.09.017}, pages = {1 -- 7}, year = {2021}, language = {en} } @article{IbenthalKehmannBackhaus2021, author = {Ibenthal, E. and Kehmann, M. and Backhaus, C.}, title = {Effectiveness of personalized music systems to influence neuropsychiatric symptoms associated with dementia: a quasi-experimental study}, series = {EXPLORE: The Journal of Science \& Healing}, volume = {18}, journal = {EXPLORE: The Journal of Science \& Healing}, doi = {10.1016/j.explore.2021.03.004}, pages = {319 -- 326}, year = {2021}, language = {en} } @inproceedings{NguyenMartinaKernagisetal.2021, author = {Nguyen, K. and Martina, S. and Kernagis, D. and Bershad, E. and Clark, J. and Hinricher, N. and Backhaus, C.}, title = {Effekt of repetetive, successive oculometric testing an saccades, smooth pursuit, and visual reaction times for future head down bed rest study (HDBR) applikations}, series = {Contribution to the NASA Online-Conference for Advancing Human Space Flight Research Through Innovation and Collaboration}, booktitle = {Contribution to the NASA Online-Conference for Advancing Human Space Flight Research Through Innovation and Collaboration}, year = {2021}, language = {en} } @article{PawelzikBackhaus2021, author = {Pawelzik, L. and Backhaus, C.}, title = {Evaluation of Impuls-Oscillometric Extravasatio Prevention}, series = {Medical Engineering and Physics}, volume = {88}, journal = {Medical Engineering and Physics}, issn = {1350-4533}, doi = {10.1016/j.medengphy.2020.12.004}, pages = {54 -- 58}, year = {2021}, language = {en} } @inproceedings{IbenthalKehmannBackhaus2021, author = {Ibenthal, E. and Kehmann, M. and Backhaus, C.}, title = {Arbeitswissenschaftliche Analyse zum Verhalten von Menschen mit Demenz in station{\"a}ren Pflegeeinrichtungen unter Einfluss personalisierter Musik}, series = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-29-4}, pages = {C.3.1}, year = {2021}, language = {de} } @inproceedings{KoenigHinricherBackhaus2021, author = {K{\"o}nig, S. and Hinricher, N. and Backhaus, C.}, title = {Physisches Modell oder virtueller Prototyp? Ein vergleichender Usability-Test am Beispiel eines Blutdruckmessger{\"a}tes}, series = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-29-4}, pages = {A.7.3}, year = {2021}, language = {de} } @inproceedings{HinricherKoenigBackhaus2021, author = {Hinricher, N. and K{\"o}nig, S. and Backhaus, C.}, title = {Usability-Evaluation von Steuerst{\"a}nden mittels Wizard-of-Oz Methode und Klickdummies am Beispiel eines Prototyps zur Steuerung einer Onshore-Bohranlage}, series = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {Dortmund}, address = {GfA-Press}, isbn = {978-3-936804-29-4}, pages = {C.3.2}, year = {2021}, language = {de} } @article{KoenigHinricherBackhaus2021, author = {K{\"o}nig, S. and Hinricher, N. and Backhaus, C.}, title = {VR-bility in der Medizintechnik - Medizinprodukte mittels Virtual Reality gebrauchstauglich gestalten}, series = {Arbeitsmed. Sozialmed. Umweltmed}, volume = {46}, journal = {Arbeitsmed. Sozialmed. Umweltmed}, issn = {0944-6052}, pages = {603 -- 605}, year = {2021}, language = {de} } @inproceedings{KoenigKlebschOstermannetal.2021, author = {K{\"o}nig, S. and Klebsch, L. and Ostermann, R. and Hinricher, N. and Kaluza, M. and Walter, S. and Heemels, H. and Backhaus, C.}, title = {Anwendbarkeit von Augmented Reality Systemen f{\"u}r eine unterst{\"u}tzte Fehlerbehebung an ECMO/ECLS-Systemen auf Intensivstationen}, series = {Beitrag zur 50. Internationalen Jahrestagung der Deutschen Gesellschaft f{\"u}r Kardiotechnik}, booktitle = {Beitrag zur 50. Internationalen Jahrestagung der Deutschen Gesellschaft f{\"u}r Kardiotechnik}, year = {2021}, language = {de} } @article{IbenthalBackhaus2021, author = {Ibenthal, E. and Backhaus, C.}, title = {Arbeit in der station{\"a}ren Demenzpflege - Unterschiede zwischen einer Pflegefachkraft, Pflegeassistenz und Betreuungskraft}, series = {Zentralbl. Arbeitsmed}, volume = {71}, journal = {Zentralbl. Arbeitsmed}, doi = {10.1007/s40664-021-00442-w}, pages = {270 -- 280}, year = {2021}, language = {de} } @article{Backhaus2021, author = {Backhaus, C.}, title = {Das Ende der {\"U}bergangsfrist der MDR - Gewinn oder Risiko f{\"u}r die Patientensicherheit?}, series = {mt-Medizintechnik}, volume = {141}, journal = {mt-Medizintechnik}, number = {4}, issn = {0344-9416}, pages = {2 -- 3}, year = {2021}, language = {de} } @inproceedings{BackhausHaimerl2021, author = {Backhaus, C. and Haimerl, G.}, title = {Engineers in Clinical Perfusion}, series = {Contribution to the 59th International Conference of the American Society for Extracorpreal Technology. AmSECT International Online Conference}, booktitle = {Contribution to the 59th International Conference of the American Society for Extracorpreal Technology. AmSECT International Online Conference}, year = {2021}, language = {en} } @article{HinricherPawelzikBackhaus2021, author = {Hinricher, N. and Pawelzik, L. and Backhaus, C.}, title = {Investigation of Impulse Oscillometry for the Detection of Extravasations using Design of Experiments and an Infusion Simulator}, series = {Medical Engineering and Physics}, volume = {92}, journal = {Medical Engineering and Physics}, number = {19}, issn = {1350-4533}, doi = {10.1016/j.medengphy.2021.04.002}, pages = {33 -- 39}, year = {2021}, language = {en} } @article{WermersSchliemannRaschkeetal.2021, author = {Wermers, Jens and Schliemann, Benedikt and Raschke, Michael J. and Michel, Philipp A. and Heilmann, Lukas F. and Dyrna, Felix and Sußiek, Julia and Frank, Andre and Katthagen, J. Christoph}, title = {Glenoid concavity has a higher impact on shoulder stability than the size of a bony defect}, series = {Knee Surgery, Sports Traumatology, Arthroscopy}, journal = {Knee Surgery, Sports Traumatology, Arthroscopy}, doi = {10.1007/s00167-021-06562-3}, year = {2021}, language = {en} } @article{KatthagenMichelRaschkeetal.2021, author = {Katthagen, J. Christoph and Michel, Philipp and Raschke, Michael J. and Sußiek, Julia and Frank, Andre and Wermers, Jens and Dyrna, Felix and Schliemann, Benedikt}, title = {The forgotten fragment: additional lesser tuberosity fixation of 4-part proximal humeral fractures-a biomechanical investigation}, series = {Journal of Shoulder and Elbow Surgery}, volume = {30}, journal = {Journal of Shoulder and Elbow Surgery}, number = {12}, issn = {1532-6500}, doi = {10.1016/j.jse.2021.04.041}, pages = {2852 -- 2861}, year = {2021}, language = {en} } @article{WermersRaschkeWilkenetal.2021, author = {Wermers, Jens and Raschke, Michael J. and Wilken, Marcel and Riegel, Arne and Katthagen, J. Christoph}, title = {The Anatomy of Glenoid Concavity-Bony and Osteochondral Assessment of a Stability-Related Parameter}, series = {Journal of Clinical Medicine}, volume = {10}, journal = {Journal of Clinical Medicine}, number = {19}, issn = {2077-0383}, doi = {10.3390/jcm10194316}, pages = {4316}, year = {2021}, language = {en} } @article{WermersSchliemannRaschkeetal.2021, author = {Wermers, Jens and Schliemann, Benedikt and Raschke, Michael J. and Dyrna, Felix and Heilmann, Lukas F. and Michel, Philipp A. and Katthagen, J. Christoph}, title = {The Glenolabral Articular Disruption Lesion Is a Biomechanical Risk Factor for Recurrent Shoulder Instability}, series = {Arthroscopy, Sports Medicine, and Rehabilitation}, volume = {3}, journal = {Arthroscopy, Sports Medicine, and Rehabilitation}, number = {6}, issn = {2666-061X}, doi = {10.1016/j.asmr.2021.08.007}, pages = {e1803 -- e1810}, year = {2021}, language = {en} } @article{CarlHochmann2021, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {MDR - Wie gut vorbereitet ist die Hilfsmittelbranche?}, series = {mt-medizintechnik}, volume = {141}, journal = {mt-medizintechnik}, number = {2}, issn = {0344-9416}, pages = {34 -- 39}, year = {2021}, abstract = {Im Mittelpunkt der Medizintechnikbranche stand in den letzten Jahren fast ausschließlich ein Thema: die Medical Device Regulation, kurz MDR. Mit Inkrafttreten der MDR steigen die regulatorischen Anforderungen f{\"u}r alle Akteure der Medizintechnikbranche in ganz Europa. Vor allem kleine und mittelst{\"a}ndische Unternehmen werden durch die Implementierung der MDR vor Herausforderungen gestellt. Das Ziel der durchgef{\"u}hrten Online-Befragung war es, ein umfassendes Erfahrungs- und Meinungsbild hinsichtlich der Akzeptanz und Umsetzbarkeit der MDR zu gewinnen. Hierf{\"u}r wurden H{\"a}ndler und Hersteller orthop{\"a}discher Hilfsmittel im Januar und Februar 2021 deutschlandweit anonymisiert befragt. In diesem Artikel werden die Ergebnisse der Umfrage ausf{\"u}hrlich dargestellt und diskutiert.}, language = {de} } @article{Carl2021, author = {Carl, Ann-Kathrin}, title = {Ergebnisse einer Umfrage der FH M{\"u}nster. MDR und die Hilfsmittelbranche}, series = {MTD Medizintechnischer Dialog}, volume = {47}, journal = {MTD Medizintechnischer Dialog}, number = {10}, issn = {0935-137X}, pages = {16 -- 18}, year = {2021}, language = {de} } @inproceedings{CarlHochmann2021, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {Regulatory Framework for 3D Printed Custom-Made Devices in Europe}, series = {Beitrag zur 3. Additive Manufacturing Meets Medicine (AMMM) Konferenz}, booktitle = {Beitrag zur 3. Additive Manufacturing Meets Medicine (AMMM) Konferenz}, issn = {2699-1977}, doi = {10.18416/AMMM.2021.2109542}, year = {2021}, abstract = {Additive manufacturing (AM) has been growing continuously over the past 20 years, enabling unprecedented tailoring to the anatomy of each patient. In Europe, custom-made devices qualify for an exemption and pass a simplified approval process. New technologies, like AM, provoke questions about the adequacy of the current regulatory framework for custom-made devices. This article addresses the regulatory requirements for such devices in Europe and discusses the implications for AM. It concludes that the legal framework for custom-made devices entails uncertainties which need to be resolved to guide manufacturers through the regulatory requirements, highlighting the specific areas of focus for AM.}, language = {en} } @article{MorawetzAshokanBalaetal.2020, author = {Morawetz, Klaus and Ashokan, Vinod and Bala, Renu and Pathak, Kare}, title = {Exact ground-state properties of the one-dimensional electron gas at high density}, series = {Physical Review B 101}, journal = {Physical Review B 101}, doi = {10.1103/PhysRevB.101.075130}, pages = {075130-1 -- 075130-9}, year = {2020}, language = {en} } @article{VerpoortBittnerWittrock2020, author = {Verpoort, Sven and Bittner, Matthias and Wittrock, Ulrich}, title = {Fast focus-shifter based on a unimorph deformable mirror}, series = {Applied Optics}, volume = {59}, journal = {Applied Optics}, number = {23}, organization = {Optical Society of America}, issn = {1559-128X}, doi = {10.1364/AO.397495}, pages = {6959 -- 6965}, year = {2020}, abstract = {On-the-fly remote laser processing plays an increasingly important role in modern fabrication techniques. These processes require guiding of the focus of a laser beam along the contours of the workpiece in three dimensions. State-of-the-art galvanometer scanners already provide highly dynamic and precise transverse x-y beam steering. However, longitudinal focus shifting ("z-shifting") relying on conventional optics is restricted to a bandwidth of a few hundred Hz. We have developed and manufactured a fast piezo-based z-shifting mirror with diffraction-limited surface fidelity providing a focus shift of 1z> 60 mm with an actuation rate of 2 kHz.}, language = {en} } @article{KazasidisVerpoortWittrock2020, author = {Kazasidis, Orestis and Verpoort, Sven and Wittrock, Ulrich}, title = {Sensor for dynamic focus control of a deformable mirror}, series = {Appl. Opt.}, journal = {Appl. Opt.}, number = {59}, doi = {10.1364/AO.392970}, pages = {5625 -- 5630}, year = {2020}, abstract = {We recently presented a novel unimorph deformable mirror which allows for dynamic focus shift with an actuation rate of 2 kHz. Such mirrors suffer from hysteresis and creep. Therefore, they have to be operated in closed-loop. For this purpose, we developed a defocus sensor based on an astigmatic detection system. In this paper, we present the sensor design and discuss its performance.}, language = {en} } @article{PavlovGurbatovKudryashovetal.2020, author = {Pavlov, DV and Gurbatov, SO and Kudryashov, SI and Gurevich, EL and Kuchmizhak, AA}, title = {Laser-induced surface relief nanocrowns as a manifestation of nanoscale Rayleigh-Plateau hydrodynamic instability}, series = {Applied Surface Science}, volume = {511/2020}, journal = {Applied Surface Science}, doi = {10.1016/j.apsusc.2020.145463}, pages = {145463 -- 145463}, year = {2020}, abstract = {Nanoscale hydrodynamic instability of ring-like molten rims around ablative microholes produced in nanometer-thick silver and gold films by tightly focused nanosecond (ns) laser pulses was experimentally explored in terms of laser pulse energy and film thickness. These parametric dependencies of basic instability characteristics - order and period of the resulting nanocrowns - were analyzed, revealing its apparently Rayleigh-Plateau character, as compared to much less consistent possible van der Waals and impact origins. Along with fundamental importance, these findings will put forward ns pulsed laser ablation as an alternative facile inexpensive table-top approach to study such hydrodynamic instabilities developing at ns temporal and nanometer spatial scales as well as to produce unique plasmon-active hierarchical surface morphologies applicable for chemo- and biosensing.}, language = {en} } @inproceedings{SurkampZylaGurevichetal.2020, author = {Surkamp, N and Zyla, G and Gurevich, EL and Esen, C and Klehr, A and Knigge, A and Ostendorf, A and Hofmann, MR}, title = {Mode-locked diode lasers as sources for two-photon polymerization}, series = {3D Printed Optics and Additive Photonic Manufacturing II}, booktitle = {3D Printed Optics and Additive Photonic Manufacturing II}, publisher = {International Society for Optics and Photonics}, address = {USA}, doi = {10.1117/12.2555890}, pages = {113490G -- 113490G}, year = {2020}, abstract = {In this study, we use a hybrid mode-locked external cavity diode laser with subsequent amplification and pulse compression. The system provides laser pulses of 440 fs width (assuming a sech² pulse shape) and 160 mW average output power at a repetition rate of 383.1 MHz. The laser oscillator consists of a double quantum well laser diode with a gain segment of 1080 μm length and an absorber element of 80 μm lengths. The chip's back facet is covered with a high reflective coating, the front facet with an anti-reflective coating. The resonator itself is operated in a collimated geometry and folded by two dielectric mirrors. The used output coupler provides a transmission of 20 percent, which is coupled into a tapered amplifier. Two Faraday isolators are used to decouple the laser and the amplifier from any back reflections. Subsequently, the pulses are compressed using a single pass Martinez type pulse compressor …}, language = {en} } @inproceedings{WangGurevichOstendorf2020, author = {Wang, Hao and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Microhardness and microabrasion behaviour of NiTi shape memory alloy after femtosecond laser shock peening without coating in air}, series = {High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX}, booktitle = {High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX}, publisher = {International Society for Optics and Photonics}, address = {USA}, doi = {10.1117/12.2543550}, pages = {1127301 -- 1127301}, year = {2020}, abstract = {The experiment study presents the influence of femtosecond laser shock peening (FsLSP) without a protective layer in the air on the surface hardness and surface mechanical property of NiTi shape memory alloy. Femtosecond laser shock peening is a new possibility of direct laser ablation without any protective layer under atmospheric conditions, which can produce intense shock waves with low pulse energy in the air. The average surface roughness values of the NiTi alloy samples were measured, because the surface roughness may affect its friction resistance. The results showed that the surface roughness of NiTi increased after femtosecond laser shock peening treatment. In comparison with the initial state, the coefficient of friction decreased and surface microhardness increased after femtosecond laser shock peening treatment with different FsLSP parameters. This improvement of wear properties may be attributed to the enhancement of surface microhardness and surface titanium oxide layer induced by the shock wave and laser ablation during FsLSP treatment.}, language = {en} } @article{WangJuergensenDeckeretal.2020, author = {Wang, Hao and J{\"u}rgensen, Jens and Decker, Peer and Hu, Zhiyong and Yan, Kai and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Corrosion behavior of NiTi alloy subjected to femtosecond laser shock peening without protective coating in air environment}, series = {Applied Surface Science}, volume = {501/2020}, journal = {Applied Surface Science}, doi = {10.1016/j.apsusc.2019.144338}, pages = {144338 -- 144338}, year = {2020}, abstract = {Laser shock peening with femtosecond laser was used to improve the corrosion resistance of biomedical NiTi alloy without protective coating in the air environment. The energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD) based analysis showed that the laser ablation could produce titanium oxide layer and femtosecond laser shock peening (FsLSP) can generate residual stress in the surface layer of NiTi alloy. The FsLSP improved the corrosion resistance of NiTi in 3.5\% NaCl solution and Hank's solution and also prevented the formation of corrosion cracks and pits during corrosion testing. The reasons for the improvement of corrosion behavior may be the generation of residual stress and titanium oxide film during the laser surface treatment.}, language = {en} } @article{SurkampZylaGurevichetal.2020, author = {Surkamp, N and Zyla, G and Gurevich, Evgeny L and Klehr, A and Knigge, A and Ostendorf, Andreas and Hofmann, MR}, title = {Mode-locked diode laser-based two-photon polymerisation}, series = {Electronics Letters}, volume = {56/2020}, journal = {Electronics Letters}, number = {2}, issn = {0013-5194}, doi = {10.1049/el.2019.2385}, pages = {91 -- 93}, year = {2020}, abstract = {In this Letter, the authors present the construction of three-dimensional microstructures by two-photon polymerisation induced by ultrashort pulses of a mode-locked diode laser. The ultrafast light source is based on a diode laser with segmented metallisation to realise a waveguide integrated saturable absorber. It is subsequently amplified and compressed resulting in ultrashort laser pulses of 440 fs length and average output power of 160 mW at a fundamental repetition rate of 383.1 MHz. These pulses are coupled into a customised two-photon polymerisation setup. A series of suspended lines were fabricated between support cuboids for testing the process behaviour. A 3D structure with complex features was polymerised to demonstrate the high potential for mode-locked diode lasers in the field of direct laser writing.}, language = {en} } @article{MaragkakiSkaradzinskiNettetal.2020, author = {Maragkaki, Stella and Skaradzinski, Christian A and Nett, Ralf and Gurevich, Evgeny L}, title = {Influence of defects on structural colours generated by laser-induced ripples}, series = {Scientific Reports}, volume = {10}, journal = {Scientific Reports}, number = {1}, doi = {10.1038/s41598-019-56638-x}, pages = {53 -- 53}, year = {2020}, abstract = {The colourisation of metallic surface which appears due to periodic surface patterns induced by ultrashort laser pulses is studied. Ripples due to the sub-micrometer size of their period act as a diffraction grating, generating structural colours. Carefully chosen strategy of the laser spot scanning allows us to mimic the nanostructures responsible for structural colours of some flowers on the metal substrate. We investigate the correlation between the colourising effects and the artificially-induced defects in the ripples structure and show that these defects can make the colours observable in a larger range of viewing angles. Further we address the influence of the processing parameters on the spectral profile of the reflected light.}, language = {en} } @article{WangGurevichOstendorf2020, author = {Wang, Hao and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Femtosecond laser shock peening on the surface of NiTi shape memory alloy}, series = {Procedia CIRP}, volume = {94/2020}, journal = {Procedia CIRP}, doi = {10.1016/j.procir.2020.09.071}, pages = {910 -- 913}, year = {2020}, abstract = {Laser shock peening with a femtosecond laser system was presented in this research work. The NiTi shape memory alloy was processed by the femtosecond laser shock peening (FsLSP) treatment without a protective layer in the air. Femtosecond laser shock peening is a new surface technology, which can induce an intense shock wave with low single laser pulse energy under atmospheric conditions. The surface topography, roughness, microhardness, and wear resistance were measured on the surface of NiTi alloy before and after femtosecond laser peening treatment. The results showed that the surface roughness and microhardness could be increased after femtosecond laser shock peening, which may be due to the laser ablation and micro-plastic deformation induced by the shock wave. The wear property of NiTi alloy was improved, which may be attributed to the FsLSPed surface texturing and …}, language = {en} } @article{SyubaevGurbatovModinetal.2020, author = {Syubaev, Sergey and Gurbatov, Stanislav and Modin, Evgeny and Linklater, Denver P and Juodkazis, Saulius and Gurevich, Evgeny L and Kuchmizhak, Aleksandr}, title = {Laser Printing of Plasmonic Nanosponges}, series = {Nanomaterials}, volume = {10}, journal = {Nanomaterials}, number = {12}, publisher = {Multidisciplinary Digital Publishing Institute}, pages = {2427 -- 2427}, year = {2020}, abstract = {Three-dimensional porous nanostructures made of noble metals represent novel class of nanomaterials promising for nonlinear nanooptics and sensors. Such nanostructures are typically fabricated using either reproducible yet time-consuming and costly multi-step lithography protocols or less reproducible chemical synthesis that involve liquid processing with toxic compounds. Here, we combined scalable nanosecond-laser ablation with advanced engineering of the chemical composition of thin substrate-supported Au films to produce nanobumps containing multiple nanopores inside. Most of the nanopores hidden beneath the nanobump surface can be further uncapped using gentle etching of the nanobumps by an Ar-ion beam to form functional 3D plasmonic nanosponges. The nanopores 10-150 nm in diameter were found to appear via laser-induced explosive evaporation/boiling and coalescence of the randomly arranged nucleation sites formed by nitrogen-rich areas of the Au films. Density of the nanopores can be controlled by the amount of the nitrogen in the Au films regulated in the process of their magnetron sputtering assisted with nitrogen-containing discharge gas.}, language = {en} } @article{WangKellerBaietal.2020, author = {Wang, Hao and Keller, S{\"o}ren and Bai, Yongtao and Kashaev, Nikolai and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Laser shock peening on high-strength steel}, series = {SPIE.Digital Library}, volume = {Volume 11546}, journal = {SPIE.Digital Library}, number = {Proceedings Volume 11546}, doi = {10.1117/12.2574988}, pages = {115460L -- 115460L}, year = {2020}, abstract = {High strength steel has been used in the aviation industry and automotive body structural applications to reduce its mass through a reduction in thickness. Therefore, it is very important to enhance its mechanical property, such as microhardness. In the present research, the high strength steel samples were treated by laser shock peening (LSP) with different laser pulse energy and laser pulse width. The microhardness and residual stress were measured to compare the difference between laser energy of 3 J with 10 ns and 5 J with 20 ns. The results in the study show that the surface LSP treatment can increase the microhardness and the compressive residual stress can be found when the samples were tested by hole drilling testing.}, language = {en} } @article{ElangoHoppiusKukrejaetal.2020, author = {Elango, Kishore and Hoppius, Jan S and Kukreja, Lalit M and Ostendorf, Andreas and Gurevich, Evgeny L}, title = {Studies on ultra-short pulsed laser shock peening of stainless-steel in different confinement media}, series = {Surface and Coatings Technology}, volume = {397}, journal = {Surface and Coatings Technology}, doi = {10.1016/j.surfcoat.2020.125988}, pages = {125988 -- 125988}, year = {2020}, abstract = {We investigate the role of liquid confinement media on ultra-short pulsed Laser Shock Peening (LSP). The LSP of stainless-steel 316 and 316 L was studied using Ti: Sapphire laser pulses of about 2 ps duration, maximum energy of about 1 mJ and pulse repetition rate of 5 kHz in different liquid confinement media of Ethanol, Deionized water and separate aqueous solutions of NaCl and Glycerol. It is found that the laser fluence and/or energy attenuating mechanisms like self-focusing, filamentation, plasma breakdown in the confinement media are less significant with ps laser pulses than those with sub-ps or fs pulse durations. It is shown that the resulting surface hardness of the peened steel as a function of laser fluence depends significantly on the confinement media and the relative increase in the hardness increases monotonically with the acoustic impedance of the liquid of the confinement medium used during …}, language = {en} } @article{GurevichLevyBulgakova2020, author = {Gurevich, Evgeny L and Levy, Yoann and Bulgakova, Nadezhda M}, title = {Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals}, series = {Nanomaterials}, volume = {10}, journal = {Nanomaterials}, number = {9}, doi = {10.3390/nano10091836}, pages = {1836 -- 1836}, year = {2020}, abstract = {Two different scenarios are usually invoked in the formation of femtosecond Laser-Induced Periodic Surface Structures (LIPSS), either "self-organization" mechanisms or a purely "plasmonic" approach. In this paper, a three-step model of formation of single-laser-shot LIPSS is summarized. It is based on the periodic perturbation of the electronic temperature followed by an amplification, for given spatial periods, of the modulation in the lattice temperature and a final possible relocation by hydrodynamic instabilities. An analytical theory of the evolution of the temperature inhomogeneities is reported and supported by numerical calculations on the examples of three different metals: Al, Au, and Mo. The criteria of the possibility of hydrodynamic instabilities are also discussed.}, language = {en} } @article{ZylaKovalevGurevichetal.2020, author = {Zyla, Gordon and Kovalev, Alexander and Gurevich, Evgeny L and Esen, Cemal and Liu, Ying and Lu, Yongfeng and Gorb, Stanislav and Ostendorf, Andreas}, title = {Structural colors with angle-insensitive optical properties generated by Morpho-inspired 2PP structures}, series = {Applied Physics A}, volume = {126}, journal = {Applied Physics A}, number = {9}, doi = {10.1007/s00339-020-03931-6}, pages = {740 -- 740}, year = {2020}, abstract = {This paper describes how two-photon polymerization was used to generate biomimetic nanostructures with angle-insensitive coloration inspired by the blue butterflies of Morpho. Less angle dependence was achieved by engineering the structures with a certain degree of disorder, which delimited them from classical photonic crystals. Variations in the processing parameters enabled the color hue to be controlled. In this context, blue, green, yellow, and brown structures were demonstrated. Reflection spectra of the structures were simulated and studied experimentally in a broad range of incident angles. Additionally, a molding technique was performed as a potential scale-up strategy. The application of such biomimetic structures is discussed.}, language = {en} } @article{ZylaSurkampGurevichetal.2020, author = {Zyla, Gordon and Surkamp, Nils and Gurevich, Evgeny L and Esen, Cemal and Klehr, Andreas and Knigge, Andrea and Hofmann, Matin R and Ostendorf, Andreas}, title = {Two-photon polymerization with diode lasers emitting ultrashort pulses with high repetition rate}, series = {Optics Letters}, volume = {45}, journal = {Optics Letters}, number = {17}, doi = {10.1364/OL.401738}, pages = {4827 -- 4830}, year = {2020}, abstract = {In this Letter, we investigate the resolution of two-photon polymerization (2PP) with an amplified mode-locked external cavity diode laser with adjustable pulse length and a high repetition rate. The experimental results are analyzed with a newly developed 2PP model. Even with low pulse peak intensity, the produced structural dimensions are comparable to those generated by traditional 2PP laser sources. Thus, we show that a compact monolithic picosecond laser diode without amplification and with a repetition rate in the GHz regime can also be applied for 2PP. These results show the high application potential of compact mode-locked diode lasers for low-cost and compact 2PP systems.}, language = {en} } @article{WangKalchevWangetal.2020, author = {Wang, Hao and Kalchev, Yordan and Wang, Hongcai and Yan, Kai and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Surface modification of NiTi alloy by ultrashort pulsed laser shock peening}, series = {Surface and Coatings Technology}, volume = {394}, journal = {Surface and Coatings Technology}, doi = {10.1016/j.surfcoat.2020.125899}, pages = {125899 -- 125899}, year = {2020}, abstract = {This research paper presents the attempt at ultrashort pulsed laser shock peening with absence of absorptive layer and confining medium which could enhance surface microhardness and the abrasion property of NiTi shape memory alloy. The average roughness values of NiTi specimen were measured on the surface, because the roughness would affect the friction resistance. The microhardness and Young's modulus were investigated at different position of single laser spot by nanoindentation technique. The pin-on-plate sliding abrasion testing were performed with different load-force (0.5 N and 2 N) for different testing time. Results showed that ultrashort pulsed laser shock peening treatment would cause a significant improvement on friction coefficient and abrasion property, which was attributed to the change of surface modification, such as roughness, microhardness, microstructure and titanium oxide layer …}, language = {en} } @article{SyubaevMitsaiPorfirevetal.2020, author = {Syubaev, S. and Mitsai, E. and Porfirev, A. and Khonina, S. and Kudryashov, S. and Katkus, T. and Juodkazis, S. and Gurevich, E. L. and Kuchmizhak, A.}, title = {Silicon microprotrusions with tailored chirality enabled by direct femtosecond laser ablation}, series = {Optics Letters}, volume = {45}, journal = {Optics Letters}, number = {11}, doi = {10.1364/OL.393979}, pages = {3050 -- 3053}, year = {2020}, abstract = {Here, we report on formation of nanoprotrusions on the surface of a bulk crystalline silicon wafer under femtosecond-laser ablation with a donut-shaped laser beam. By breaking circular symmetry of the irradiating donut-shaped fs-pulse beam, a switch in geometry of the formed surface nanoprotrusions from regular to chiral was demonstrated. The chirality of the obtained Si nanostructures was promoted with an asymmetry degree of the laser beam. An uneven helical flow of laser-melted Si caused by asymmetry of the initial intensity and temperature pattern on the laser-irradiated Si surface explains this phenomenon. Chirality of the formed protrusions was confirmed by visualizing cross-sectional cuts produced by focused ion beam milling as well as Raman activity of these structures probed by circularly polarized light with opposite handedness. Our results open a pathway towards easy-to-implement inexpensive …}, language = {en} } @article{TrinschekStegemertenJohnetal.2020, author = {Trinschek, Sarah and Stegemerten, Fenna and John, Karin and Thiele, Uwe}, title = {Thin-film modeling of resting and moving active droplets}, series = {Physical Review E}, volume = {101}, journal = {Physical Review E}, number = {6}, doi = {10.1103/PhysRevE.101.062802}, pages = {062802}, year = {2020}, language = {fr} } @article{IbenthalKehmannBackhaus2020, author = {Ibenthal, E. and Kehmann, M. and Backhaus, C.}, title = {Feasibility of a Music System Intervention to Affect Mental Stress and Strain of Employees in Inpatient Dementia Care}, series = {Annals of Work Exposures and Health}, volume = {65}, journal = {Annals of Work Exposures and Health}, doi = {10.1093/annweh/wxaa120}, pages = {591 - 604}, year = {2020}, language = {en} } @incollection{BackhausBenadLauetal.2020, author = {Backhaus, C. and Benad, N. and Lau, H.-J. and Pleiss, T.}, title = {Verordnung (EU) Nr. 2017/745 {\"u}ber Medizinprodukte - Eine Einf{\"u}hrung}, series = {Capanni F., Emmend{\"o}rffer A., Steffen A., Stockhardt J. (Hrsg.) Medizinprodukte planen, entwickeln, realisieren}, booktitle = {Capanni F., Emmend{\"o}rffer A., Steffen A., Stockhardt J. (Hrsg.) Medizinprodukte planen, entwickeln, realisieren}, publisher = {T{\"U}V Media}, address = {K{\"o}ln}, isbn = {978-3-7406-0544-5}, year = {2020}, language = {de} } @article{IbenthalMuellerBackhaus2020, author = {Ibenthal, E. and M{\"u}ller, L. and Backhaus, C.}, title = {Gebrauchstauglichkeit und Akzeptanz mobiler Personenlifter}, series = {mt-Medizintechnik}, volume = {140}, journal = {mt-Medizintechnik}, issn = {0344-9416}, pages = {17 -- 20}, year = {2020}, language = {de} } @article{BackhausPawelzik2020, author = {Backhaus, C. and Pawelzik, L.}, title = {Human Factors in der Kardiotechnik}, series = {Kardiotechnik}, volume = {29}, journal = {Kardiotechnik}, issn = {0941-2670}, pages = {2}, year = {2020}, language = {de} } @article{MuellerBackhaus2020, author = {M{\"u}ller, L. and Backhaus, C.}, title = {"Gut bedienbar? Ja, klar, das sehe ich sofort!"}, series = {mt-Medizintechnik}, volume = {140}, journal = {mt-Medizintechnik}, issn = {0344-9416}, pages = {2}, year = {2020}, language = {de} } @inproceedings{IbenthalSobkowiczBackhaus2020, author = {Ibenthal, E. and Sobkowicz, S. and Backhaus, C}, title = {Investigation of Clamping and Crushing Injuries with Electrically Height-Adjustable Therapy Beds}, series = {Contribution to the 22th International Human Computer Interaction Conference}, booktitle = {Contribution to the 22th International Human Computer Interaction Conference}, doi = {10.1007/978-3-030-49904-4_10}, pages = {132 -- 144}, year = {2020}, language = {en} } @article{BackhausHomannJaeger2020, author = {Backhaus, C. and Homann, H. and J{\"a}ger, M.}, title = {Entwicklung und Evaluation eines Hilfsmittels zum manuellen Umsetzen mobilit{\"a}tseingeschr{\"a}nkter Personen in Verkehrsflugzeugen}, series = {Zentralbl. Arbeitsmed}, volume = {70}, journal = {Zentralbl. Arbeitsmed}, doi = {10.1007/s40664-020-00390-x}, pages = {164 -- 171}, year = {2020}, language = {de} } @inproceedings{IbenthalKehmannBackhaus2020, author = {Ibenthal, E. and Kehmann, M. and Backhaus, C.}, title = {K{\"o}nnen Musikassistenzsysteme psychische Fehlbeanspruchungen in der Demenzpflege verringern? Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, series = {Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-27-0}, year = {2020}, language = {de} } @article{SiebersSannwaldtBackhaus2020, author = {Siebers, S. and Sannwaldt, F. and Backhaus, C.}, title = {Vergleich grundlegender Aufgaben in VR und echtem Szenario}, series = {Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, journal = {Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-27-0}, pages = {B.1.5}, year = {2020}, language = {de} } @article{BackhausHomannJaeger2020, author = {Backhaus, C. and Homann, H. and J{\"a}ger, M.}, title = {Unterst{\"u}tzung mobilit{\"a}tseingeschr{\"a}nkter Personen in Verkehrsflugzeugen - Evaluation eines Hilfsmittels zum manuellen Umsetzen von Sitz zu Sitz}, series = {Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, journal = {Beitrag zum 66. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-27-0}, pages = {A.14.2}, year = {2020}, language = {de} } @article{MuellerBackhaus2020, author = {M{\"u}ller, L. and Backhaus, C.}, title = {Fehlk{\"a}ufe verhindern - strukturierte Einbindung der Anwender in Kaufentscheidungen}, series = {mt-Medizintechnik}, volume = {140}, journal = {mt-Medizintechnik}, issn = {0344-9416}, pages = {20 -- 24}, year = {2020}, language = {de} }