TY - JOUR A1 - Kiel, Frederik A1 - Trinschek, Sarah A1 - Kuchmizhak, Aleksandr A1 - Gurevich, Evgeny T1 - Colouration of diamond surfaces by laser-induced periodic surface structuring JF - Optics & Laser Technology Y1 - 2024 U6 - http://dx.doi.org/10.1016/j.optlastec.2023.109882 IS - 168 SP - 109882 ER - TY - JOUR A1 - Morawetz, Klaus T1 - Time behavior of hubble parameter by torsion JF - Modern Physics Letters A N2 - 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. KW - Gravitation, Hubble constant, Cosmology, Torsion Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-179736 VL - Vol. 39 IS - No. 3 SP - 2350192-1 EP - 2350192-10 ER - TY - CHAP A1 - Schubert, Bruno A1 - Hochmann, David A1 - Berghaus, Michael A1 - Apmann, Hilmar T1 - Comparison of 316L stainless steel parts produced by MEX and LPBF additive and conventional manufacturing for biomedical sensing applications T2 - Transactions on Additive Manufacturing Meets Medicine Vol. 6 No. 1 (2024): Trans. AMMM N2 - This study presents a comprehensive evaluation of force sensors manufactured through conventional CNC machining, laser powder bed fusion (LPBF), and material extrusion (MEX) 3D printing methods. The study utilized a combination of finite element method (FEM) simulations, functional testing, durability assessments, and ultimate strength testing in order to assess the viability of additive manufacturing for sensing technology applications. The FEM simulations provided a preliminary framework for predictive analysis, closely aligning with experimental outcomes for LPBF and conventionally manufactured sensors. Nevertheless, discrepancies were observed in the performance of MEX-printed sensors during ultimate strength testing, necessitating the implementation of more comprehensive modeling approaches that take into account the distinctive material characteristics and failure mechanisms. Functional testing confirmed the operational capability of all sensors, thereby demonstrating their suitability for the intended application. Moreover, all sensors exhibited resilience during 50,000 cycles of cyclic testing, indicating reliability, durability, and satisfactory fatigue life performance. Notably, sensors produced via LPBF exhibited a significant increase in strength, nearly three times that of conventionally manufactured sensors. These findings suggest the potential for innovative sensor design and the expansion of their use into higher-loaded applications. Overall, while both LPBF and conventional methods demonstrated reliability and closely matched simulation predictions, further research is necessary to refine modeling approaches for MEX-printed sensors and fully unlock their potential in sensing technology applications. These findings indicate that additive manufacturing of metals may be a viable alternative for the fabrication of biomedical sensors. KW - 3d-printing KW - metal additive manufacturing KW - laser powder bed fusion KW - material extrusion KW - biomedical sensing application Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-181812 UR - https://www.journals.infinite-science.de/index.php/ammm/article/view/1788 SN - 2699-1977 SP - 1 EP - 12 PB - Infinite Science Publishing CY - Lübeck ER - TY - CHAP A1 - Carl, Ann-Kathrin A1 - Kirillov, Maxim A1 - Hochmann, David A1 - Quadrat, Eric T1 - Towards credible computational models: Application of a risk-based framework for establishing credibility T2 - Transactions on Additive Manufacturing Meets Medicine N2 - 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. KW - computational modeling and simulation KW - CMS KW - validation KW - V&V 40 KW - model credibility Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-173821 SN - 2699-1977 ER - TY - JOUR A1 - Homrighausen, Jonas A1 - Horsthemke, Ludwig A1 - Pogorzelski, Jens A1 - Trinschek, Sarah A1 - Glösekötter, Peter A1 - Gregor, Markus T1 - Edge-Machine-Learning-Assisted Robust Magnetometer Based on Randomly Oriented NV-Ensembles in Diamond JF - Sensors N2 - 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. Y1 - 2023 UR - https://www.mdpi.com/1424-8220/23/3/1119 U6 - http://dx.doi.org/10.3390/s23031119 VL - 23 IS - 3 ER - TY - JOUR A1 - Herbst, Elmar A1 - Muhmann, Raphael J. A1 - Raschke, Michael J. A1 - Katthagen, J. Christoph A1 - Oeckenpöhler, Simon A1 - Wermers, Jens A1 - Glasbrenner, Johannes A1 - Robinson, James R. A1 - Kittl, Christoph T1 - The Anterior Fibers of the Superficial MCL and the ACL Restrain Anteromedial Rotatory Instability JF - The American Journal of Sports Medicine Y1 - 2023 U6 - http://dx.doi.org/10.1177/03635465231187043 ER - TY - CHAP A1 - Hinricher, N. A1 - Schröer, C. A1 - Ibenthal, E. A1 - Müller, L. A1 - Backhaus, C. T1 - Einfluss einer 5. Rolle auf die Wirbelsäulenkompressionskräfte beim Schieben und Ziehen von Krankenhausbetten T2 - Beitrag zum 69. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2023 PB - GfA-Press CY - St. Augustin ER - TY - CHAP A1 - Müller, L. A1 - Hinricher, N. A1 - Schröer, C. A1 - Louw, J. A1 - Ibenthal, I. A1 - Backhaus, C. T1 - Das Krankenhausbett als Hilfsmittel zur Patientenmobilisation T2 - Beitrag zum 69. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2023 VL - St. Augustin PB - GfA-Press ER - TY - CHAP A1 - Schröer, C. A1 - Hinricher, N. A1 - Ibenthal, E. A1 - Müller, L. A1 - Backhaus, C. T1 - Untersuchung des Einflusses einer fünften Rolle und des Rollendurchmessers auf die benötigte Kraft zum Schieben von Krankenhausbetten T2 - Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft für Arbeitsmedizin und Umweltmedizin Y1 - 2023 ER - TY - CHAP A1 - Schröer, C. A1 - Hinricher, N. A1 - Ibenthal, I. A1 - Müller, L. A1 - Backhaus, C. T1 - Expertenevaluation der ergonomischen und sicherheitstechnischen Gestaltung von Krankenhausbetten T2 - Beitrag zum 69. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2023 PB - GfA-Press CY - St. Augustin ER - TY - CHAP A1 - Siebers, S. A1 - Franke, A. A1 - Backhaus, C. T1 - Lärm im Krankenhaus – Spitzenschalldruckpegel bei der Bedienung von Krankenhausbetten T2 - Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft für Arbeitsmedizin und Umweltmedizin Y1 - 2023 ER - TY - CHAP A1 - Ibenthal, E. A1 - Hinricher, N. A1 - Backhaus, C. T1 - Prävalenz des Karpaltunnelsyndroms bei Pflegekräften in der Dialyse T2 - Beitrag zur 63. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft für Arbeitsmedizin und Umweltmedizin Y1 - 2023 ER - TY - JOUR A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - Impact of the new European medical device regulation: a two-year comparison JF - Biomedical Engineering / Biomedizinische Technik N2 - 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. KW - orthopaedic aids KW - medical device regulation KW - MDR KW - survey Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-173816 SN - 1862-278X ER - TY - JOUR A1 - Carl, Ann-Kathrin T1 - Umfrage der FH Münster zu zwei Jahren MDR in der Hilfsmittelbranche. Wie steht’s um die Praxistauglichkeit? JF - MTD Medizintechnischer Dialog Y1 - 2023 SN - 0935-137X VL - 49 IS - 7 SP - 6 EP - 8 ER - TY - JOUR A1 - Katthagen, J. Christoph A1 - Wermers, Jens A1 - Paus, Christoph A1 - Michel, Philipp A. A1 - Köhler, Alina A1 - Schliemann, Benedikt A1 - Raschke, Michael J. T1 - 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 JF - Arthroscopy: The Journal of Arthroscopic & Related Surgery Y1 - 2023 U6 - http://dx.doi.org/10.1016/j.arthro.2023.08.018 ER - TY - JOUR A1 - Morawetz, Klaus T1 - Extended quasiparticle Padé approximation for non-Fermi liquids N2 - 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. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-177120 SP - 1 EP - 16 ER - TY - JOUR A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - Comparison of the regulatory requirements for custom-made medical devices using 3D printing in Europe, the United States, and Australia JF - Biomedical Engineering / Biomedizinische Technik N2 - 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. KW - additive manufacturing KW - AM KW - personalized medical devices KW - regulation Y1 - 2022 U6 - http://dx.doi.org/10.1515/bmt-2021-0266 SN - 1862-278X VL - 67 IS - 6 SP - 61 EP - 69 ER - TY - JOUR A1 - Deichsel, Adrian A1 - Raschke, Michael J. A1 - Herbst, Elmar A1 - Peez, Christian A1 - Oeckenpöhler, Simon A1 - Briese, Thorben A1 - Wermers, Jens A1 - Kittl, Christoph A1 - Glasbrenner, Johannes T1 - The Biomechanical Stability of Bone Staples in Cortical Fixation of Tendon Grafts for Medial Collateral Ligament Reconstruction Depends on the Implant Design JF - The American Journal of Sports Medicine Y1 - 2022 U6 - http://dx.doi.org/10.1177/03635465221130753 SN - 1552-3365 VL - 50 IS - 14 SP - 3827 EP - 3831 ER - TY - JOUR A1 - Heilmann, Lukas F. A1 - Sußiek, Julia A1 - Raschke, Michael J. A1 - Langer, Martin F. A1 - Frank, Andre A1 - Wermers, Jens A1 - Michel, Philipp A. A1 - Dyrna, Felix A1 - Schliemann, Benedikt A1 - Katthagen, J. Christoph T1 - Biomechanical Analysis of Coracoid Stability After Coracoplasty: How Low Can You Go? JF - Orthopaedic Journal of Sports Medicine Y1 - 2022 U6 - http://dx.doi.org/10.1177/23259671221077947 SN - 2325-9671 VL - 10 IS - 2 ER - TY - CHAP A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - Aktueller Stand der regulatorischen Vorgaben für 3D-gedruckte Sonderanfertigungen in Europa T2 - Beitrag zur OTWorld 2022 Y1 - 2022 UR - https://www.ot-world.com/files/otworld/congress/102771.pdf ER - TY - JOUR A1 - Behrendt, Peter A1 - Herbst, Elmar A1 - Robinson, James R. A1 - von Negenborn, Leslie A1 - Raschke, Michael J. A1 - Wermers, Jens A1 - Glasbrenner, Johannes A1 - Fink, Christian A1 - Herbort, Mirco A1 - Kittl, Christoph T1 - The Control of Anteromedial Rotatory Instability Is Improved With Combined Flat sMCL and Anteromedial Reconstruction JF - The American Journal of Sports Medicine Y1 - 2022 U6 - http://dx.doi.org/10.1177/03635465221096464 SN - 1552-3365 VL - 50 IS - 8 SP - 2093 EP - 2101 ER - TY - JOUR A1 - Bobkova, Valeriia A1 - Trinschek, Sarah A1 - Otte, Eileen A1 - Denz, Cornelia T1 - Analyzing light-structuring features of droplet lenses on liquid-repelling surfaces JF - Optics Express Y1 - 2022 U6 - http://dx.doi.org/10.1364/OE.444777 VL - 30 IS - 4 SP - 5937 EP - 5952 ER - TY - JOUR A1 - Müller, D. A1 - Kehmann, M. A1 - Siebers, S. A1 - Backhaus, C. T1 - Rasterelektronenmikroskopische Untersuchung zum Verschleiß des Membranmaterials von Oxygenatoren nach Langzeitanwendung JF - Kardiotechnik Y1 - 2022 UR - https://dgfkt.de/organisation/publikationen/rasterelektronenmikroskopische-untersuchung-zum-verschleiss-des-membranmaterials-von-oxygenatoren-nach-langzeitanwendung/ U6 - http://dx.doi.org/10.47624/kt.031.EZCZ3563 VL - 31 IS - 4 SP - 141 EP - 145 ER - TY - JOUR A1 - Peez, Christian A1 - Wermers, Jens A1 - Glasbrenner, Johannes A1 - Briese, Thorben A1 - Raschke, Michael J. A1 - Herbst, Elmar A1 - Kittl, Christoph T1 - Qualitative and Quantitative Assessment of the Medial Patellar Retinaculum Anatomy: the Anteromedial Side of the Knee Revisited JF - Orthopaedic Journal of Sports Medicine Y1 - 2022 U6 - http://dx.doi.org/10.1177/23259671221134818 VL - 10 IS - 11 ER - TY - JOUR A1 - Otte, Eileen A1 - Bobkova, Valeria A1 - Trinschek, Sarah A1 - Rosales-Guzmán, Carmelo A1 - Denz, Cornelia T1 - Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light JF - APL Photonics N2 - 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. Y1 - 2022 U6 - http://dx.doi.org/10.1063/5.0086536 VL - 2022 IS - 7 SP - 086105 ER - TY - JOUR A1 - Katthagen, J. Christoph A1 - Sußiek, Julia A1 - Frank, Andre A1 - Wermers, Jens A1 - Schliemann, Benedikt A1 - Raschke, Michael J. T1 - Double plating is associated with higher fixation strength than single plating in osteoporotic fractures of the scapular spine: a biomechanical study JF - Archives of Orthopaedic and Trauma Surgery Y1 - 2022 U6 - http://dx.doi.org/10.1007/s00402-021-03879-z SN - 1434-3916 VL - 142 IS - 8 SP - 1859 EP - 1864 ER - TY - JOUR A1 - Sußiek, Julia A1 - Wermers, Jens A1 - Raschke, Michael J. A1 - Herbst, Elmar A1 - Dyrna, Felix A1 - Riesenbeck, Oliver A1 - Katthagen, J. Christoph T1 - Acromioclavicular and coracoclavicular ligamentous insertion distances depend on the scapular tilt and decrease with anterior direction of the inferior scapula angle JF - Knee Surgery, Sports Traumatology, Arthroscopy Y1 - 2022 U6 - http://dx.doi.org/10.1007/s00167-022-07126-9 SN - 1433-7347 ER - TY - JOUR A1 - Morawetz, Klaus A1 - Trinschek, Sarah A1 - Gurevich, Evgeny T1 - Interplay of viscosity and surface tension for ripple formation by laser melting JF - Physical Review B Y1 - 2022 U6 - http://dx.doi.org/10.1103/PhysRevB.105.035415 VL - 105 IS - 3 SP - 035415 ER - TY - JOUR A1 - Backhaus, C. A1 - Carl, A. A1 - Siebers, S. A1 - Urlichs, F. T1 - Lärmbelastung einer neonatalen Intensivstation – Gibt es einen Tag-Nacht-Unterschied der Schallexposition? JF - Zentralbl. Arbeitsmed. Y1 - 2022 U6 - http://dx.doi.org/10.1007/s40664-022-00486-6 VL - 73 SP - 24 EP - 31 ER - TY - CHAP A1 - Ibenthal, E. A1 - Backhaus, C. T1 - Reducing work-related stress in nursing when dealing with people with dementia through music intervention - which factors are relevant? T2 - Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices Y1 - 2022 U6 - http://dx.doi.org/10.54941/ahfe1001661 VL - 38 SP - 34 EP - 41 ER - TY - CHAP A1 - Hinricher, N. A1 - Schröer, C. A1 - Backhaus, C. T1 - Design of control elements in virtual reality - investigation of factors influencing operating efficiency, user experience and presence T2 - Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Human Factors in Virtual Environments and Game Design Y1 - 2022 U6 - http://dx.doi.org/10.54941/ahfe1002066 VL - 50 SP - 100 EP - 109 ER - TY - CHAP A1 - Ibenthal, E. A1 - Hinricher, N. A1 - Backhaus, C. T1 - Feasibility of a tracking system for hospital beds to improve work processes of nurses T2 - Contribution to the 11th International Working on Safety Net Conference in Algarve/Portugal. ID1080 Y1 - 2022 ER - TY - JOUR A1 - Alonso, Iván A1 - Alpigiani, Cristiano A1 - Wittrock, Ulrich T1 - Cold atoms in space: community workshop summary and proposed road-map JF - EPJ Quantum Technology N2 - We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, and atom interferometers. Prospective applications include metrology, geodesy and measurement of terrestrial mass change due to, e.g., climate change, and fundamental science experiments such as tests of the equivalence principle, searches for dark matter, measurements of gravitational waves and tests of quantum mechanics. We review the current status of cold atom technologies and outline the requirements for their space qualification, including the development paths and the corresponding technical milestones, and identifying possible pathfinder missions to pave the way for missions to exploit the full potential of cold atoms in space. Finally, we present a first draft of a possible road-map for achieving these goals, that we propose for discussion by the interested cold atom, Earth Observation, fundamental physics and other prospective scientific user communities, together with the European Space Agency (ESA) and national space and research funding agencies. Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-160413 UR - https://link.springer.com/article/10.1140/epjqt/s40507-022-00147-w SP - 30 PB - Springer Nature ER - TY - CHAP A1 - Schröer, C. A1 - Hinricher, N. A1 - Ibenthal, E. A1 - Müller, L. A1 - Backhaus, C. T1 - Messtechnische Analyse der Belastung des Hand-Arm-Systems durch Druckkräfte beim Aufrüsten von Hämodialysegeräten T2 - Beitrag zur 62. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft für Arbeitsmedizin und Umweltmedizin Y1 - 2022 SN - 978-3-9823608-3-6 SP - 978–3–9823608–3–6 ER - TY - CHAP A1 - Müller, L. A1 - Hinricher, N. A1 - Ibenthal, E. A1 - Backhaus, C. T1 - Berücksichtigung messtechnisch erhobener Muskel-Skelett-Belastungen bei Kaufentscheidungen in Gesundheitseinrichtungen T2 - Beitrag zum 68. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2022 SN - 978-3-936804-31-7 SP - B.5.3 PB - GfA-Press CY - St. Augustin ER - TY - CHAP A1 - Müller, L. A1 - Hinricher, N. A1 - Gersie, J. A1 - Backhaus, C. T1 - Prototype of a Piece of Clothing for Patients for Quick and Easy Patient Mobilizations in Healthcare Facilities T2 - Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices Y1 - 2022 U6 - http://dx.doi.org/10.54941/ahfe1002122 VL - 51 SP - 230 EP - 238 ER - TY - CHAP A1 - Kleyer, J. A1 - Hinricher, N. A1 - Ibenthal, E. A1 - Müller, L. A1 - Backhaus, C. T1 - Messtechnische Analyse der Körperhaltung und -bewegung beim Aufrüsten von Hämodialysegeräten T2 - Beitrag zur 62. Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft für Arbeitsmedizin und Umweltmedizin Y1 - 2022 SN - 978–3–9823608–3–6 ER - TY - CHAP A1 - Backhaus, C. A1 - Siebers, S. T1 - Work-related noise exposure in a neonatal intensive care unit - stressful work activities and diurnal rhythmic variations T2 - Contribution to the 13th International Conference on Applied Human Factors and Ergonomics. Healthcare and Medical Devices Y1 - 2022 U6 - http://dx.doi.org/10.54941/ahfe1002129 VL - 51 SP - 286 EP - 292 ER - TY - CHAP A1 - Louw, J. A1 - Schröer, C. A1 - Hinricher, N. A1 - Ibenthal, E. A1 - Müller, L. A1 - Backhaus, C. T1 - Anwenderakzeptanz von Hämodialysegeräten T2 - Beitrag zum 68. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2022 SN - 978-3-936804-31-7 SP - C.9.5 PB - GfA-Press CY - St. Augustin ER - TY - CHAP A1 - Schröer, C. A1 - Hinricher, N. A1 - Ibenthal, E. A1 - Müller, L. A1 - Backhaus, C. T1 - Messtechnische Analyse der Belastung des Hand-Arm-Systems durch Drehmomente beim Aufrüsten von Hämodialysegeräten T2 - Beitrag zum 68. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2022 SN - 978-3-936804-31-7 SP - A.4.5 PB - GfA-Press CY - St. Augustin ER - TY - CHAP A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - In-silico Methoden im Zulassungsprozess. Regulatorische Anforderungen an computergestützte Modellierung und Simulation T2 - Medizinprodukte planen, entwickeln, realisieren. Der CE-Routenplaner N2 - Die computergestützte Modellierung und Simulation (CMS) ist in vielen Bereichen der Industrie gängige Praxis und hat das Potenzial, die Medizintechnikbranche zu revolutionieren. Die Markteinführung neuer Produkte kann erheblich beschleunigt und entstehende Kosten können reduziert werden, ohne die Patientensicherheit negativ zu beeinflussen. Dennoch beruhen die Entwicklungs- und Zulassungsprozesse in der Medizintechnik bis dato überwiegend auf experimentell ermittelten Daten, was in Europa unter anderem auf die bestehenden regulatorischen Unsicherheiten zurückzuführen ist. Verglichen mit der FDA hat die EU-Kommission die Möglichkeiten der CMS bisher nicht erkannt – es fehlt an rechtlichen Vorgaben. Der folgende Artikel soll daher eine Übersicht der aktuellen regulatorischen Situation bieten. Y1 - 2022 SN - 978-3-7406-0716-6 SP - 1 EP - 15 PB - TÜV Media GmbH TÜV Rheinland Group CY - Köln ER - TY - JOUR A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - Regulatorische Anforderungen an Computergestützte Modellierung und Simulation JF - mt-medizintechnik N2 - Die computergestützte Modellierung und Simulation (CMS) ist in vielen Bereichen der Industrie gängige Praxis und hat das Potenzial die Medizintechnikbranche zu revolutionieren. Die Markteinführung neuer Produkte kann erheblich beschleunigt und entstehende Kosten können reduziert werden, ohne die Patientensicherheit negativ zu beeinflussen. Dennoch beruhen die Entwicklungs- und Zulassungsprozesse in der Medizintechnik bis dato überwiegend auf experimentell ermittelten Daten, was in Europa unter anderem auf die bestehenden regulatorischen Unsicherheiten zurückzuführen ist. Verglichen mit der FDA hat die EU-Kommission die Möglichkeiten der CMS bisher nicht erkannt – es fehlt an rechtlichen Vorgaben. Der folgende Artikel soll daher eine Übersicht der aktuellen regulatorischen Situation bieten. KW - computergestützte Modellierung und Simulation KW - CMS KW - in silico-Verfahren KW - Zulassungsprozess Y1 - 2022 SN - 0344-9416 VL - 142 IS - 4 SP - 14 EP - 18 ER - TY - CHAP A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - Regulatory Framework for 3D Printed Custom-Made Devices in Europe T2 - Beitrag zur 3. Additive Manufacturing Meets Medicine (AMMM) Konferenz N2 - 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. Y1 - 2021 U6 - http://dx.doi.org/10.18416/AMMM.2021.2109542 SN - 2699-1977 ER - TY - CHAP A1 - Wang, Hao A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - Application of nanoindentation technique to test surface hardness and residual stress of NiTi alloy after femtosecond laser shock peening T2 - High-Power Laser Materials Processing: Applications, Diagnostics, and Systems X / SPIE.Digital.Library N2 - 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. Y1 - 2021 UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11679/116790J/Application-of-nanoindentation-technique-to-test-surface-hardness-and-residual/10.1117/12.2593092.full?tab=ArticleLinkReference U6 - http://dx.doi.org/10.1117/12.2593092 SP - 116790J-0 EP - 116790J-5 PB - International Society for Optics and Photonics CY - USA ER - TY - CHAP A1 - Freudling, Maximilian A1 - Grzesik, Andreas A1 - Erhard, Markus A1 - Gerhards, Maximilian A1 - Leitz, Sinje A1 - Verpoort, Sven A1 - Wittrock, Ulrich A1 - Hallibert, Pascal T1 - Space-qualified piezo based deformable mirror for future instruments with active optics T2 - Proceedings of the International Conference on Space Optics (ICSO) N2 - 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 Münster 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. KW - deformable mirror KW - active optics KW - space qualification KW - space telescopes KW - adaptive optics Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-137410 UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11852/1185231/Space-qualified-Piezo-Based-Deformable-Mirror-for-future-Instruments-with/10.1117/12.2599467.full VL - 11852 SP - 1185231-11 ER - TY - CHAP A1 - Leitz, Sinje A1 - Gerhards, Maximilian A1 - Verpoort, Sven A1 - Wittrock, Ulrich A1 - Freudling, Maximilian A1 - Grzesik, Andreas A1 - Erhard, Markus A1 - Hallibert, Pascal T1 - Vibration and shock testing of a 50 mm aperture unimorph deformable mirror T2 - Proceedings of the International Conference on Space Optics (ICSO) N2 - 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. KW - active optics KW - adaptive optics KW - deformable mirror KW - vibration damping KW - space telescopes Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-137401 UR - https://icso2020.com/ VL - 11852 SP - 118524N ER - TY - CHAP A1 - Nguyen, K. A1 - Martina, S. A1 - Kernagis, D. A1 - Bershad, E. A1 - Clark, J. A1 - Hinricher, N. A1 - Backhaus, C. T1 - Effekt of repetetive, successive oculometric testing an saccades, smooth pursuit, and visual reaction times for future head down bed rest study (HDBR) applikations T2 - Contribution to the NASA Online-Conference for Advancing Human Space Flight Research Through Innovation and Collaboration Y1 - 2021 ER - TY - JOUR A1 - Pues, Patrick A1 - Laube, Michael A1 - Fischer, Stefan A1 - Schröder, Franziska A1 - Schwung, Sebastian A1 - Rytz, Daniel A1 - Fiehler, Torben A1 - Wittrock, Ulrich A1 - Jüstel, Thomas T1 - Luminescence and up-conversion of single crystalline Lu3Al5O12:Pr3+ JF - Journal of Luminescence N2 - 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. KW - Pr3+ luminescence KW - Single crystal KW - Photoluminescence KW - Up-conversion KW - Temperature-dependent spectroscopy Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.jlumin.2021.117987 VL - 234 SP - 117987 EP - 117995 ER - TY - CHAP A1 - Ibenthal, E. A1 - Kehmann, M. A1 - Backhaus, C. T1 - Arbeitswissenschaftliche Analyse zum Verhalten von Menschen mit Demenz in stationären Pflegeeinrichtungen unter Einfluss personalisierter Musik T2 - Beitrag zum 67. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2021 SN - 978-3-936804-29-4 SP - C.3.1 PB - GfA-Press CY - Dortmund ER - TY - JOUR A1 - Dobbelstein, Henrik A1 - George, Easo P A1 - Gurevich, Evgeny L A1 - Kostka, Aleksander A1 - Ostendorf, Andreas A1 - Laplanche, Guillaume T1 - Laser metal deposition of refractory high-entropy alloys for high-throughput synthesis and structure-property characterization JF - International Journal of Extreme Manufacturing N2 - 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. Y1 - 2021 UR - https://iopscience.iop.org/article/10.1088/2631-7990/abcca8/meta VL - 3 IS - 1 SP - 015201 EP - 015201 PB - IOP Publishing ER - TY - JOUR A1 - Wang, Hao A1 - Nett, Ralf A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser JF - Applied Sciences N2 - 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. KW - laser nitriding; wear resistance; NiTi alloy; roughness; microhardness Y1 - 2021 U6 - http://dx.doi.org/10.3390/app11020515 VL - 11 IS - 2 SP - 515 ER - TY - JOUR A1 - Kasischke, Maren A1 - Hartmann, Simon A1 - Niermann, Kevin A1 - Kostyrin, Denis A1 - Thiele, Uwe A1 - Gurevich, Evgeny L T1 - Pattern Formation in Slot-Die Coating JF - arXiv.org N2 - 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. Y1 - 2021 UR - https://arxiv.org/abs/2101.01614 VL - 2021 SP - 1 EP - 24 ER - TY - JOUR A1 - Trinschek, Sarah A1 - Vorholt, Christian A1 - Wittrock, Ulrich T1 - Nonlinear dynamics in intra-cavity pumped thin-disk lasers JF - Optics Express N2 - 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. Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-132355 UR - https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-4-5755&id=447544 VL - 29 IS - 4 SP - 5755 EP - 5773 ER - TY - JOUR A1 - Morawetz, Klaus T1 - Exploring Anomalies by Many-Body Correlations JF - PSS B N2 - 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. Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-142836 PB - Wiley ER - TY - JOUR A1 - Morawetz, KLaus T1 - Consistent solution of Einstein–Cartan equations with torsion outside matter Y1 - 2021 U6 - http://dx.doi.org/10.1088/1361-6382/ac2417 ER - TY - JOUR A1 - Katthagen, J. Christoph A1 - Michel, Philipp A1 - Raschke, Michael J. A1 - Sußiek, Julia A1 - Frank, Andre A1 - Wermers, Jens A1 - Dyrna, Felix A1 - Schliemann, Benedikt T1 - The forgotten fragment: additional lesser tuberosity fixation of 4-part proximal humeral fractures-a biomechanical investigation JF - Journal of Shoulder and Elbow Surgery Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.jse.2021.04.041 SN - 1532-6500 VL - 30 IS - 12 SP - 2852 EP - 2861 ER - TY - JOUR A1 - Wermers, Jens A1 - Schliemann, Benedikt A1 - Raschke, Michael J. A1 - Michel, Philipp A. A1 - Heilmann, Lukas F. A1 - Dyrna, Felix A1 - Sußiek, Julia A1 - Frank, Andre A1 - Katthagen, J. Christoph T1 - Glenoid concavity has a higher impact on shoulder stability than the size of a bony defect JF - Knee Surgery, Sports Traumatology, Arthroscopy Y1 - 2021 U6 - http://dx.doi.org/10.1007/s00167-021-06562-3 ER - TY - JOUR A1 - Wermers, Jens A1 - Schliemann, Benedikt A1 - Raschke, Michael J. A1 - Dyrna, Felix A1 - Heilmann, Lukas F. A1 - Michel, Philipp A. A1 - Katthagen, J. Christoph T1 - The Glenolabral Articular Disruption Lesion Is a Biomechanical Risk Factor for Recurrent Shoulder Instability JF - Arthroscopy, Sports Medicine, and Rehabilitation Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.asmr.2021.08.007 SN - 2666-061X VL - 3 IS - 6 SP - e1803 EP - e1810 ER - TY - JOUR A1 - Wermers, Jens A1 - Raschke, Michael J. A1 - Wilken, Marcel A1 - Riegel, Arne A1 - Katthagen, J. Christoph T1 - The Anatomy of Glenoid Concavity-Bony and Osteochondral Assessment of a Stability-Related Parameter JF - Journal of Clinical Medicine Y1 - 2021 U6 - http://dx.doi.org/10.3390/jcm10194316 SN - 2077-0383 VL - 10 IS - 19 SP - 4316 ER - TY - JOUR A1 - Sandten, Christian Stefan A1 - Böing, Christian A1 - Hrincius, Eike A1 - Anhlan, Darisuren A1 - Kreyenschmidt, Martin A1 - Ludwig, Stephan A1 - Mertins, Hans-Christoph A1 - Mellmann, Alexander A1 - Dworog, Andreas A1 - Hanning, Stephanie A1 - Kuennemann, Thilo A1 - Niehues, Christopher A1 - Schupp, Thomas A1 - Stec, Edyta A1 - Thume, Julius A1 - Triphaus, Daniel A1 - Wilkern, Markus A1 - Uphoff, Holger A1 - Zündorf, Josef A1 - Jacobshagen, Anja T1 - Decontamination of disposable respirators for reuse in a pandemic employing in-situ-generated peracetic acid JF - American Journal of Infection Control KW - Sars-CoV-2 Y1 - 2021 UR - https://www.ajicjournal.org/action/showPdf?pii=S0196-6553%2821%2900620-9 U6 - http://dx.doi.org/10.1016/j.ajic.2021.09.017 VL - 00 / 2021 SP - 1 EP - 7 ER - TY - JOUR A1 - Hinricher, N. A1 - Pawelzik, L. A1 - Backhaus, C. T1 - Investigation of Impulse Oscillometry for the Detection of Extravasations using Design of Experiments and an Infusion Simulator JF - Medical Engineering and Physics Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.medengphy.2021.04.002 SN - 1350-4533 VL - 92 IS - 19 SP - 33 EP - 39 ER - TY - CHAP A1 - König, S. A1 - Klebsch, L. A1 - Ostermann, R. A1 - Hinricher, N. A1 - Kaluza, M. A1 - Walter, S. A1 - Heemels, H. A1 - Backhaus, C. T1 - Anwendbarkeit von Augmented Reality Systemen für eine unterstützte Fehlerbehebung an ECMO/ECLS-Systemen auf Intensivstationen T2 - Beitrag zur 50. Internationalen Jahrestagung der Deutschen Gesellschaft für Kardiotechnik Y1 - 2021 ER - TY - JOUR A1 - Ibenthal, E. A1 - Kehmann, M. A1 - Backhaus, C. T1 - Effectiveness of personalized music systems to influence neuropsychiatric symptoms associated with dementia: a quasi-experimental study JF - EXPLORE: The Journal of Science & Healing Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.explore.2021.03.004 VL - 18 SP - 319 EP - 326 ER - TY - JOUR A1 - Ibenthal, E. A1 - Backhaus, C. T1 - Arbeit in der stationären Demenzpflege – Unterschiede zwischen einer Pflegefachkraft, Pflegeassistenz und Betreuungskraft JF - Zentralbl. Arbeitsmed Y1 - 2021 U6 - http://dx.doi.org/10.1007/s40664-021-00442-w VL - 71 SP - 270 EP - 280 ER - TY - JOUR A1 - König, S. A1 - Hinricher, N. A1 - Backhaus, C. T1 - VR-bility in der Medizintechnik - Medizinprodukte mittels Virtual Reality gebrauchstauglich gestalten JF - Arbeitsmed. Sozialmed. Umweltmed Y1 - 2021 SN - 0944-6052 VL - 46 SP - 603 EP - 605 ER - TY - JOUR A1 - Backhaus, C. T1 - Das Ende der Übergangsfrist der MDR – Gewinn oder Risiko für die Patientensicherheit? JF - mt-Medizintechnik Y1 - 2021 SN - 0344-9416 VL - 141 IS - 4 SP - 2 EP - 3 ER - TY - CHAP A1 - Backhaus, C. A1 - Haimerl, G. T1 - Engineers in Clinical Perfusion T2 - Contribution to the 59th International Conference of the American Society for Extracorpreal Technology. AmSECT International Online Conference Y1 - 2021 ER - TY - CHAP A1 - Hinricher, N. A1 - König, S. A1 - Backhaus, C. T1 - Usability-Evaluation von Steuerständen mittels Wizard-of-Oz Methode und Klickdummies am Beispiel eines Prototyps zur Steuerung einer Onshore-Bohranlage T2 - Beitrag zum 67. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2021 SN - 978-3-936804-29-4 SP - C.3.2 PB - Dortmund CY - GfA-Press ER - TY - CHAP A1 - König, S. A1 - Hinricher, N. A1 - Backhaus, C. T1 - Physisches Modell oder virtueller Prototyp? Ein vergleichender Usability-Test am Beispiel eines Blutdruckmessgerätes T2 - Beitrag zum 67. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2021 SN - 978-3-936804-29-4 SP - A.7.3 PB - GfA-Press CY - Dortmund ER - TY - JOUR A1 - Pawelzik, L. A1 - Backhaus, C. T1 - Evaluation of Impuls-Oscillometric Extravasatio Prevention JF - Medical Engineering and Physics Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.medengphy.2020.12.004 SN - 1350-4533 VL - 88 SP - 54 EP - 58 ER - TY - JOUR A1 - Carl, Ann-Kathrin A1 - Hochmann, David T1 - MDR – Wie gut vorbereitet ist die Hilfsmittelbranche? JF - mt-medizintechnik N2 - 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 für alle Akteure der Medizintechnikbranche in ganz Europa. Vor allem kleine und mittelständische Unternehmen werden durch die Implementierung der MDR vor Herausforderungen gestellt. Das Ziel der durchgeführten Online-Befragung war es, ein umfassendes Erfahrungs- und Meinungsbild hinsichtlich der Akzeptanz und Umsetzbarkeit der MDR zu gewinnen. Hierfür wurden Händler und Hersteller orthopädischer Hilfsmittel im Januar und Februar 2021 deutschlandweit anonymisiert befragt. In diesem Artikel werden die Ergebnisse der Umfrage ausführlich dargestellt und diskutiert. KW - Medical Device Regulation KW - MDR KW - Medizinprodukte KW - Hilfsmittelbranche KW - Regulatorik Y1 - 2021 SN - 0344-9416 VL - 141 IS - 2 SP - 34 EP - 39 ER - TY - JOUR A1 - Carl, Ann-Kathrin T1 - Ergebnisse einer Umfrage der FH Münster. MDR und die Hilfsmittelbranche JF - MTD Medizintechnischer Dialog Y1 - 2021 SN - 0935-137X VL - 47 IS - 10 SP - 16 EP - 18 ER - TY - JOUR A1 - Wang, Hao A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - Femtosecond laser shock peening on the surface of NiTi shape memory alloy JF - Procedia CIRP N2 - 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 … KW - laser shock peeningfemtosecond laserNiTi alloymicrohardness Y1 - 2020 U6 - http://dx.doi.org/10.1016/j.procir.2020.09.071 VL - 94/2020 SP - 910 EP - 913 ER - TY - CHAP A1 - Ibenthal, E. A1 - Kehmann, M. A1 - Backhaus, C. T1 - Können Musikassistenzsysteme psychische Fehlbeanspruchungen in der Demenzpflege verringern? Beitrag zum 66. Kongress der Gesellschaft für Arbeitswissenschaft T2 - Beitrag zum 66. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2020 SN - 978-3-936804-27-0 PB - GfA-Press CY - Dortmund ER - TY - JOUR A1 - Morawetz, Klaus A1 - Ashokan, Vinod A1 - Bala, Renu A1 - Pathak, Kare T1 - Exact ground-state properties of the one-dimensional electron gas at high density JF - Physical Review B 101 Y1 - 2020 U6 - http://dx.doi.org/10.1103/PhysRevB.101.075130 SP - 075130-1 EP - 075130-9 ER - TY - JOUR A1 - Kazasidis, Orestis A1 - Verpoort, Sven A1 - Wittrock, Ulrich T1 - Sensor for dynamic focus control of a deformable mirror JF - Appl. Opt. N2 - 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. KW - deformable mirrors KW - diode lasers KW - laser beams KW - laser machining KW - sensor performance Y1 - 2020 UR - https://www.osapublishing.org/ao/abstract.cfm?uri=ao-59-18-5625 U6 - http://dx.doi.org/10.1364/AO.392970 IS - 59 SP - 5625 EP - 5630 ER - TY - JOUR A1 - Syubaev, Sergey A1 - Gurbatov, Stanislav A1 - Modin, Evgeny A1 - Linklater, Denver P A1 - Juodkazis, Saulius A1 - Gurevich, Evgeny L A1 - Kuchmizhak, Aleksandr T1 - Laser Printing of Plasmonic Nanosponges JF - Nanomaterials N2 - 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. Y1 - 2020 UR - https://doi.org/10.3390/nano10122427 VL - 10 IS - 12 SP - 2427 EP - 2427 PB - Multidisciplinary Digital Publishing Institute ER - TY - JOUR A1 - Elango, Kishore A1 - Hoppius, Jan S A1 - Kukreja, Lalit M A1 - Ostendorf, Andreas A1 - Gurevich, Evgeny L T1 - Studies on ultra-short pulsed laser shock peening of stainless-steel in different confinement media JF - Surface and Coatings Technology N2 - 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 … Y1 - 2020 U6 - http://dx.doi.org/10.1016/j.surfcoat.2020.125988 VL - 397 SP - 125988 EP - 125988 ER - TY - JOUR A1 - Zyla, Gordon A1 - Kovalev, Alexander A1 - Gurevich, Evgeny L A1 - Esen, Cemal A1 - Liu, Ying A1 - Lu, Yongfeng A1 - Gorb, Stanislav A1 - Ostendorf, Andreas T1 - Structural colors with angle-insensitive optical properties generated by Morpho-inspired 2PP structures JF - Applied Physics A N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.1007/s00339-020-03931-6 VL - 126 IS - 9 SP - 740 EP - 740 ER - TY - JOUR A1 - Gurevich, Evgeny L A1 - Levy, Yoann A1 - Bulgakova, Nadezhda M T1 - Three-Step Description of Single-Pulse Formation of Laser-Induced Periodic Surface Structures on Metals JF - Nanomaterials N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.3390/nano10091836 VL - 10 IS - 9 SP - 1836 EP - 1836 ER - TY - JOUR A1 - Wang, Hao A1 - Keller, Sören A1 - Bai, Yongtao A1 - Kashaev, Nikolai A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - Laser shock peening on high-strength steel JF - SPIE.Digital Library N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.1117/12.2574988 VL - Volume 11546 IS - Proceedings Volume 11546 SP - 115460L EP - 115460L ER - TY - JOUR A1 - Surkamp, N A1 - Zyla, G A1 - Gurevich, Evgeny L A1 - Klehr, A A1 - Knigge, A A1 - Ostendorf, Andreas A1 - Hofmann, MR T1 - Mode-locked diode laser-based two-photon polymerisation JF - Electronics Letters N2 - 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. KW - laser mode locking; polymerisation; optical waveguides; high-speed optical techniques; two-photon processes; optical pulse compression; optical saturable absorption; integrated optics; semiconductor lasers Y1 - 2020 U6 - http://dx.doi.org/10.1049/el.2019.2385 SN - 0013-5194 VL - 56/2020 IS - 2 SP - 91 EP - 93 ER - TY - JOUR A1 - Pavlov, DV A1 - Gurbatov, SO A1 - Kudryashov, SI A1 - Gurevich, EL A1 - Kuchmizhak, AA T1 - Laser-induced surface relief nanocrowns as a manifestation of nanoscale Rayleigh-Plateau hydrodynamic instability JF - Applied Surface Science N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.1016/j.apsusc.2020.145463 VL - 511/2020 SP - 145463 EP - 145463 ER - TY - CHAP A1 - Surkamp, N A1 - Zyla, G A1 - Gurevich, EL A1 - Esen, C A1 - Klehr, A A1 - Knigge, A A1 - Ostendorf, A A1 - Hofmann, MR T1 - Mode-locked diode lasers as sources for two-photon polymerization T2 - 3D Printed Optics and Additive Photonic Manufacturing II N2 - 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 … Y1 - 2020 U6 - http://dx.doi.org/10.1117/12.2555890 SP - 113490G EP - 113490G PB - International Society for Optics and Photonics CY - USA ER - TY - CHAP A1 - Wang, Hao A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - Microhardness and microabrasion behaviour of NiTi shape memory alloy after femtosecond laser shock peening without coating in air T2 - High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.1117/12.2543550 SP - 1127301 EP - 1127301 PB - International Society for Optics and Photonics CY - USA ER - TY - JOUR A1 - Wang, Hao A1 - Jürgensen, Jens A1 - Decker, Peer A1 - Hu, Zhiyong A1 - Yan, Kai A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - Corrosion behavior of NiTi alloy subjected to femtosecond laser shock peening without protective coating in air environment JF - Applied Surface Science N2 - 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. KW - Laser shock peeningFemtosecond laserNiTi alloyCorrosion behaviorLaser surface treatment Y1 - 2020 U6 - http://dx.doi.org/10.1016/j.apsusc.2019.144338 VL - 501/2020 SP - 144338 EP - 144338 ER - TY - JOUR A1 - Maragkaki, Stella A1 - Skaradzinski, Christian A A1 - Nett, Ralf A1 - Gurevich, Evgeny L T1 - Influence of defects on structural colours generated by laser-induced ripples JF - Scientific Reports N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.1038/s41598-019-56638-x VL - 10 IS - 1 SP - 53 EP - 53 ER - TY - JOUR A1 - Syubaev, S. A1 - Mitsai, E. A1 - Porfirev, A. A1 - Khonina, S. A1 - Kudryashov, S. A1 - Katkus, T. A1 - Juodkazis, S. A1 - Gurevich, E. L. A1 - Kuchmizhak, A. T1 - Silicon microprotrusions with tailored chirality enabled by direct femtosecond laser ablation JF - Optics Letters N2 - 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 … Y1 - 2020 U6 - http://dx.doi.org/10.1364/OL.393979 VL - 45 IS - 11 SP - 3050 EP - 3053 ER - TY - JOUR A1 - Wang, Hao A1 - Kalchev, Yordan A1 - Wang, Hongcai A1 - Yan, Kai A1 - Gurevich, Evgeny L A1 - Ostendorf, Andreas T1 - Surface modification of NiTi alloy by ultrashort pulsed laser shock peening JF - Surface and Coatings Technology N2 - 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 … Y1 - 2020 U6 - http://dx.doi.org/10.1016/j.surfcoat.2020.125899 VL - 394 SP - 125899 EP - 125899 ER - TY - JOUR A1 - Zyla, Gordon A1 - Surkamp, Nils A1 - Gurevich, Evgeny L A1 - Esen, Cemal A1 - Klehr, Andreas A1 - Knigge, Andrea A1 - Hofmann, Matin R A1 - Ostendorf, Andreas T1 - Two-photon polymerization with diode lasers emitting ultrashort pulses with high repetition rate JF - Optics Letters N2 - 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. Y1 - 2020 U6 - http://dx.doi.org/10.1364/OL.401738 VL - 45 IS - 17 SP - 4827 EP - 4830 ER - TY - JOUR A1 - Verpoort, Sven A1 - Bittner, Matthias A1 - Wittrock, Ulrich T1 - Fast focus-shifter based on a unimorph deformable mirror JF - Applied Optics N2 - 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. KW - beam steering KW - deformable mirrors KW - optical components KW - laser machining KW - laser materials processing Y1 - 2020 UR - https://www.osapublishing.org/ao/abstract.cfm?uri=ao-59-23-6959 U6 - http://dx.doi.org/10.1364/AO.397495 SN - 1559-128X VL - 59 IS - 23 SP - 6959 EP - 6965 ER - TY - JOUR A1 - Trinschek, Sarah A1 - Stegemerten, Fenna A1 - John, Karin A1 - Thiele, Uwe T1 - Thin-film modeling of resting and moving active droplets JF - Physical Review E Y1 - 2020 U6 - http://dx.doi.org/10.1103/PhysRevE.101.062802 VL - 101 IS - 6 SP - 062802 ER - TY - BOOK A1 - Backhaus, C. A1 - Benad, N. A1 - Lau, H.-J. A1 - Pleiss, T. T1 - MDR & Co. Eine Vorschriftensammlung zum europäischen Medizinprodukterecht Y1 - 2020 SN - 978-3-7406-0529-2 PB - TÜV Media CY - Köln ER - TY - JOUR A1 - Müller, L. A1 - Backhaus, C. T1 - Fehlkäufe verhindern - strukturierte Einbindung der Anwender in Kaufentscheidungen JF - mt-Medizintechnik Y1 - 2020 SN - 0344-9416 VL - 140 SP - 20 EP - 24 ER - TY - JOUR A1 - Ibenthal, E. A1 - Sobkowicz, S. A1 - Backhaus, C. T1 - Vorkommnisse bei Therapieliegen JF - mt-Medizintechnik Y1 - 2020 SN - 0344-9416 VL - 140 SP - 20 EP - 27 ER - TY - JOUR A1 - Backhaus, C. A1 - Homann, H. A1 - Jäger, M. T1 - Unterstützung mobilitätseingeschränkter Personen in Verkehrsflugzeugen – Evaluation eines Hilfsmittels zum manuellen Umsetzen von Sitz zu Sitz JF - Beitrag zum 66. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2020 SN - 978-3-936804-27-0 SP - A.14.2 PB - GfA-Press CY - Dortmund ER - TY - CHAP A1 - Ibenthal, E. A1 - Sobkowicz, S. A1 - Backhaus, C T1 - Investigation of Clamping and Crushing Injuries with Electrically Height-Adjustable Therapy Beds T2 - Contribution to the 22th International Human Computer Interaction Conference Y1 - 2020 U6 - http://dx.doi.org/10.1007/978-3-030-49904-4_10 SP - 132 EP - 144 ER - TY - JOUR A1 - Backhaus, C. A1 - Homann, H. A1 - Jäger, M. T1 - Entwicklung und Evaluation eines Hilfsmittels zum manuellen Umsetzen mobilitätseingeschränkter Personen in Verkehrsflugzeugen JF - Zentralbl. Arbeitsmed Y1 - 2020 U6 - http://dx.doi.org/10.1007/s40664-020-00390-x VL - 70 SP - 164 EP - 171 ER - TY - JOUR A1 - Siebers, S. A1 - Sannwaldt, F. A1 - Backhaus, C. T1 - Vergleich grundlegender Aufgaben in VR und echtem Szenario JF - Beitrag zum 66. Kongress der Gesellschaft für Arbeitswissenschaft Y1 - 2020 SN - 978-3-936804-27-0 SP - B.1.5 PB - GfA-Press CY - Dortmund ER - TY - JOUR A1 - Ibenthal, E. A1 - Kehmann, M. A1 - Backhaus, C. T1 - Feasibility of a Music System Intervention to Affect Mental Stress and Strain of Employees in Inpatient Dementia Care JF - Annals of Work Exposures and Health Y1 - 2020 U6 - http://dx.doi.org/10.1093/annweh/wxaa120 VL - 65 SP - 591 – 604 ER -