@unpublished{LooseTetzlaff2017, author = {Loose, Harald and Tetzlaff, Laura}, title = {Changes of Gait and Muscle Patterns during Recovery after the Fracture of the Fibula of the Left Leg - A case study}, year = {2017}, abstract = {The paper presents an observation and evaluation of the recovery process. Seven weeks after the fracture of the fibula and six weeks after surgery the measurement of the gait of the subject has been started. Inertial measurement units applied above both ankles are used to acquire kinematical data and three surface EMG at each leg to get information about the activity of three muscles. The intensity of the weekly tests has been increased in dependence on the healing progress. Both scenarios-walking on the floor and on the treadmill-were included in the experiments to obtain comparable data sets. Beside of the investigation of the healing process the paper is focused on symmetry/asymmetry properties of the gait. The results indicate that asymmetry is not only an essential property of pathologic gait but it is present in normal gait too, especially if short distances are evaluated. They may be caused by the influence of a dominant/injured leg, of the first/last steps, the natural variance of the gait or the daily fitness of the subject. Asymmetry is obviously in the contribution of both legs to a stride (step length, strike and lift angle, stand and swing phase).}, language = {en} } @inproceedings{PlatonovAltynnikovMikhailovetal.2017, author = {Platonov, R. A. and Altynnikov, A. G. and Mikhailov, A. K. and Yastrebov, A. V. and Mukhin, N. V. and Hirsch, S{\"o}ren and Kozyrev, A. B.}, title = {Tunable impedance microwave matching of laser diodes}, series = {Konferenz: 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)/ Titel: 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)}, booktitle = {Konferenz: 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)/ Titel: 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)}, publisher = {IEEE}, address = {St Petersburg, Russia}, isbn = {978-1-5090-6269-0}, doi = {10.1109/PIERS.2017.8261920}, pages = {1152 -- 1157}, year = {2017}, language = {en} } @incollection{BurgerMenzel2023, author = {Burger-Menzel, Bettina}, title = {Wirtschaftsf{\"o}rderung und E-Governance: Von der Resilienz zur Transformation?}, series = {Wirtschaftsf{\"o}rderung in der Krise}, booktitle = {Wirtschaftsf{\"o}rderung in der Krise}, publisher = {Springer Gabler}, address = {Wiesbaden}, doi = {10.1007/978-3-658-41390-3_10}, pages = {171 -- 196}, year = {2023}, abstract = {Unsere Welt ver{\"a}ndert sich in unterschiedlichen Tempi und Verwerfungstiefen. Dies ist das einzig Verl{\"a}ssliche f{\"u}r Wirtschaft und Gesellschaft. Zum einen z{\"a}hlt die kreative Zerst{\"o}rung zum ‚Markenkern' marktwirtschaftlicher Systeme. Die Wirtschaftsakteure stehen dadurch an ihrem jeweiligen Standort unter einer Art (produktivem) Dauerstress. Es gibt Gewinner und Verlierer, weil Wettbewerber unterschiedlich erfolgreich kostensenkende Rationalisierungen, technischen Fortschritt und die Erschließung neuer (globaler) M{\"a}rkte realisieren. Der damit einhergehende Strukturwandel gilt als wirtschaftssystemischer Normalzustand. Zum anderen gibt es Krisen. Und auch ‚unter Schock' (re-)agieren Akteure ungleich, wie die Corona-Pandemie oder abrupte Ver{\"a}nderungen durch die Finanzkrise zeigen. Einige Akteure und Standorte bleiben mit ihrem jeweiligen Profil und Potenzial (weiterhin) produktiv widerstandsf{\"a}hig. F{\"u}r andere versch{\"a}rfen sich der wirtschaftliche Niedergang und dessen Folgen f{\"u}r die Arbeitsm{\"a}rkte und Lebensqualit{\"a}t der Betroffenen. Regionale Wirtschaftsf{\"o}rderung unterst{\"u}tzt, dass sich die Wirtschaftsstrukturen an einem Standort {\"u}berlebensf{\"a}hig ausrichten. Doch kann sie auch beim Umgang mit Krisen einen Mehrwert erzielen und z{\"a}hlt dies {\"u}berhaupt zu ihrem Regelauftrag? Und welche Rolle spielt die Digitalisierung? Der Beitrag stellt den sachlogischen Zusammenhang zwischen diesen Teilfragen her und ordnet neuere Ans{\"a}tze ein. Zudem werden Ansatzstellen aufgezeigt, um die regionale Wirtschaftsf{\"o}rderung praxisorientiert weiterzuentwickeln. ‚Electronic Government' (E-Government) beschreibt dabei den Einsatz von Informationstechnik, Telekommunikation und Medien (ITKM) im {\"o}ffentlichen Sektor, w{\"a}hrend ‚Electronic Governance' (E-Governance) hybride oder private Akteure miteinbezieht. Der Beitrag ist wie folgt strukturiert: Zun{\"a}chst werden Schl{\"u}sselbegriffe wie Strukturpolitik und Resilienz gekl{\"a}rt und mit den Kontextfaktoren verkn{\"u}pft, welche die Steuerungslogik von Wirtschaftsf{\"o}rderung bestimmen. Danach wird diskutiert, inwiefern die Wirtschaftsf{\"o}rderung E-Government und E-Governance nutzen kann, um Resilienz zu st{\"a}rken und m{\"o}glichst transformativ wirken zu k{\"o}nnen.}, language = {de} } @article{RizunRevinaEdelmann2023, author = {Rizun, Nina and Revina, Aleksandra and Edelmann, Noella}, title = {Application of Text Analytics in Public Service Co-Creation: Literature Review and Research Framework}, series = {DG.O 2023: The 24th Annual International Conference on Digital Government Research}, journal = {DG.O 2023: The 24th Annual International Conference on Digital Government Research}, publisher = {Association for Computing Machinery}, doi = {10.1145/3598469.3598471}, pages = {12 -- 22}, year = {2023}, abstract = {The public sector faces several challenges, such as a number of external and internal demands for change, citizens' dissatisfaction and frustration with public sector organizations, that need to be addressed. An alternative to the traditional top-down development of public services is co-creation of public services. Co-creation promotes collaboration between stakeholders with the aim to create better public services and achieve public values. At the same time, data analytics has been fuelled by the availability of immense amounts of textual data. Whilst both co-creation and TA have been used in the private sector, we study existing works on the application of Text Analytics (TA) techniques on text data to support public service co-creation. We systematically review 75 of the 979 papers that focus directly or indirectly on the application of TA in the context of public service development. In our review, we analyze the TA techniques, the public service they support, public value outcomes, and the co-creation phase they are used in. Our findings indicate that the TA implementation for co-creation is still in its early stages and thus still limited. Our research framework promotes the concept and stimulates the strengthening of the role of Text Analytics techniques to support public sector organisations and their use of co-creation process. From policy-makers' and public administration managers' standpoints, our findings and the proposed research framework can be used as a guideline in developing a strategy for the designing co-created and user-centred public services.}, language = {en} } @incollection{Tanski2023, author = {Tanski, Joachim}, title = {Limitierende Faktoren}, series = {Compliance-Management}, booktitle = {Compliance-Management}, publisher = {Springer ebooks}, doi = {10.1007/978-3-658-40682-0_4}, pages = {49 -- 49}, year = {2023}, abstract = {Wie bei allen Risiken gibt es auch bei Compliance-Risiken kein Null-Risiko. Man wird in der Praxis noch nicht einmal in die unmittelbare N{\"a}he einer Null kommen. Ein Null-Compliance-Risiko ist auch deshalb nicht erreichbar, weil sich st{\"a}ndig neue Risikofelder auftun. So beispielsweise durch {\"A}nderung von Gesch{\"a}ftsmodellen oder Vertriebswegen oder durch neue rechtliche Rahmenbedingen.}, language = {de} } @article{StannariusHarth2023, author = {Stannarius, Ralf and Harth, Kirsten}, title = {The structure of disintegrating defect clusters in smectic C freely suspended films}, series = {Soft Matter}, journal = {Soft Matter}, number = {19}, publisher = {Royal Society of Chemistry}, doi = {https://doi.org/10.1039/d3sm00808h}, pages = {6109 -- 6115}, year = {2023}, abstract = {Disclinations or disclination clusters in smectic C freely suspended films with topological charges larger than one are unstable. They disintegrate, preferably in a spatially symmetric fashion, into single defects with individual charges of +1, which is the smallest positive topological charge allowed in polar vector fields. While the opposite process of defect annihilation is well-defined by the initial defect positions, disintegration starts from a singular state and the following scenario including the emerging regular defect patterns must be selected by specific mechanisms. We analyze experimental data and compare them with a simple model where the defect clusters adiabatically pass quasi-equilibrium solutions in one-constant approximation. It is found that the defects arrange in geometrical patterns that correspond very closely to superimposed singular defect solutions, without additional director distortions. The patterns expand by affine transformations where all distances between individual defects scale with the same time-dependent scaling factor proportional to the square-root of time.}, language = {en} } @article{Guterding2023, author = {Guterding, Daniel}, title = {Sparse Modeling Approach to the Arbitrage-Free Interpolation of Plain-Vanilla Option Prices and Implied Volatilities}, series = {Risks}, journal = {Risks}, number = {11 (5)}, publisher = {MDPI}, doi = {https://doi.org/10.3390/risks11050083}, pages = {24}, year = {2023}, abstract = {We present a method for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, which is based on a system of integral equations that relates terminal density and option prices. Using a discretization of the terminal density, we write these integral equations as a system of linear equations. We show that the kernel matrix of this system is, in general, ill-conditioned, so that it cannot be solved for the discretized density using a naive approach. Instead, we construct a sparse model for the kernel matrix using singular value decomposition (SVD), which allows us not only to systematically improve the condition number of the kernel matrix, but also determines the computational effort and accuracy of our method. In order to allow for the treatment of realistic inputs that may contain arbitrage, we reformulate the system of linear equations as an optimization problem, in which the SVD-transformed density minimizes the error between the input prices and the arbitrage-free prices generated by our method. To further stabilize the method in the presence of noisy input prices or arbitrage, we apply an 𝐿1-regularization to the SVD-transformed density. Our approach, which is inspired by recent progress in theoretical physics, offers a flexible and efficient framework for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, without the need to explicitly specify a stochastic process, expansion basis functions or any other kind of model. We demonstrate the capabilities of our method in a number of artificial and realistic test cases.}, language = {en} } @article{LachowskiHammermeisterHalenzetal.2023, author = {Lachowski, Krzysztof and Hammermeister, Florian and Halenz, Bastian and Lieckefett, Florian and G{\"o}tze, Thomas and Prill, Robert and Becker, Roland}, title = {The Patellostabilometer: A New Device for Quantification of Mediolateral Patella Displacement}, series = {Sensors}, journal = {Sensors}, number = {23 (3)}, publisher = {MDPI}, doi = {https://doi.org/10.3390/s23031274}, year = {2023}, abstract = {Mediolateral patella displacement is of interest for diagnostics and clinically relevant research questions. Apart from manual testing, no standardized method is currently available. Proper quantification of patella mobility is necessary to better understand pathologies at the patellofemoral joint. Patella mobility was assessed in 25 healthy individuals using a Patellostabilometer, a new prototype instrument for quantification of the mediolateral patella displacement. The participants underwent measurements of the mediolateral displacement three times using the Patellostabilome- ter. A maximal force of 10 N was applied for patella movement. Additionally, leg length and circumference of the knee, upper- and lower-leg were measured. Lateral patella displacement of 18.27 ± 3.76 mm (range 15.85-20.64 mm, interquartile range (IQR) of 4.79) was measured. The medial patella displacement showed 24.47 ± 6.59 mm (range 19.29-29.76 mm, IQR of 10.47). The test-retest measurement error was 2.32 ± 1.76 mm (IQR of 2.38 mm), with five outliers. There was greater test-retest variability between the measurements of the medial displacement compared to the lateral one. The test-retest variability reached 7\% of the patella displacement. Other parameters provided no significant correlations. Based on the natural patellofemoral mobility, a precise and clinically relevant quantification of patella mobility is allowed.}, language = {en} } @incollection{RevinaRizunAksu2023, author = {Revina, Aleksandra and Rizun, Nina and Aksu, {\"U}nal}, title = {Towards a Framework for Context Awareness Based on Textual Process Data: Case Study Insights}, series = {Lecture Notes in Business Information Processing}, booktitle = {Lecture Notes in Business Information Processing}, number = {466}, publisher = {Springer Cham}, isbn = {978-3-031-26885-4 (Print) 978-3-031-26886-1 (online)}, doi = {https://doi.org/10.1007/978-3-031-26886-1_2}, year = {2023}, abstract = {Context awareness is critical for the successful execution of processes. In the abundance of business process management (BPM) research, frameworks exclusively devoted to extracting context from textual process data are scarce. With the deluge of textual data and its increasing value for organizations, it becomes essential to employ relevant text analytics techniques to increase the awareness of process workers, which is important for process execution. The present paper addresses this demand by developing a framework for context awareness based on process executions-related textual data using a well-established layered BPM context model. This framework combines and maps various text analytics techniques to the layers of the context model, aiming to increase the context awareness of process workers and facilitate informed decision-making. The framework is applied in an IT ticket processing case study. The findings show that contextual information obtained using our framework enriches the awareness of process workers regarding the process instance urgency, complexity, and upcoming tasks and assists in making decisions in terms of these aspects.}, language = {en} } @book{Tanski2023, author = {Tanski, Joachim}, title = {Compliance-Management}, edition = {1}, publisher = {Springer Gabler Wiesbaden}, isbn = {978-3-658-40681-3 (Softcover) 978-3-658-40682-0 (e-Book)}, doi = {https://doi.org/10.1007/978-3-658-40682-0}, pages = {63}, year = {2023}, abstract = {Dieses Buch bietet eine komprimierte und praxisorientierte Einf{\"u}hrung in die Grundlagen und Anforderungen eines Compliance-Managements, um den Leser schnell mit aktuellen und zentralen Regelungen vertraut zu machen. Dabei wird auf gesetzliche und regulatorische Bestimmungen ebenso eingegangen wie auf betriebswirtschaftliche Notwendigkeiten, um Mitarbeitende und Unternehmen vor den schwerwiegenden Folgen von Compliance-Verst{\"o}ßen zu sch{\"u}tzen.}, language = {de} }