@masterthesis{Kieker2021, type = {Bachelor Thesis}, author = {Kieker, Lea}, title = {THE LAST STOP: Eine Fotodokumentation {\"u}ber den Ort, an dem Menschen auf ihren Tod warten}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {45 Seiten}, year = {2021}, abstract = {Das Projekt thematisiert das Leben im Hospiz. Diese Arbeit liefert mittels authentischer Fotografien von R{\"a}umlichkeiten und Details sowie durch intensive Portr{\"a}ts von drei Bewohnenden einen realistischen Einblick in ein Hospiz. Durch diese Aufnahmen werden die Betrachtenden mit dem Thema „Tod" konfrontiert und es so diesem Thema n{\"a}her gebracht, um eventuelle Vorurteile einer solchen Einrichtung gegen{\"u}ber abzulegen. Innerhalb des Bildbands sieht man Fotografien von Fluren, Dekoration, R{\"a}umen und Portr{\"a}taufnahmen. Begleitend zu den Portr{\"a}tfotos der Bewohnenden finden sich im Bildband Berichte der selbigen, {\"u}ber ihre allt{\"a}glichen Gedanken im Umgang mit dem bevorstehenden eigenen Lebensende. Im Zuge der Recherche zu diesem Projekt hat außerdem ein ausf{\"u}hrliches Interview mit einer Pflegekraft des thematisierten Hospizes dabei geholfen, einen realistischen Einblick in die Arbeit vor Ort zu bekommen.}, language = {de} } @misc{Huebert2021, type = {Master Thesis}, author = {Huebert, Edgar}, title = {The Last Sketch}, publisher = {FH Aachen}, address = {Aachen}, pages = {65 Seiten}, year = {2021}, abstract = {Das Projekt thematisiert, in Form eines Animationsfilms, den Umgang eines Vaters mit dem Tod seines Kindes und den Versuch den Weg zur{\"u}ck zu sich selbst und ins Leben zu finden. Das Ziel war es die Emotionen der Schauspieler in einen Animationsfilm authentisch zu implementieren. Um den Animationsfilm situationsgerecht erz{\"a}hlen zu k{\"o}nnen, wurde das Verst{\"a}ndnis f{\"u}r Trauer in den Vordergrund gestellt. Dazu wurden digitale Drehs durchgef{\"u}hrt und viele Bereiche der 3D Gestaltung angewendet. Viele der Betroffenen erleben besonders in den ersten Tagen nach dem Verlust ihres Kindes nicht das notwendige Verst{\"a}ndnis f{\"u}r ihre Trauer. Diese Projektarbeit m{\"o}chte aufzeigen, wie unterschiedlich Menschen trauern und wie sie sich in ihrer Verschiedenheit verlieren k{\"o}nnen, besonders wenn es um das gemeinsame Kind geht. Wenn ein Kind im Sterben liegt, steht f{\"u}r die Eltern sein Wohlbefinden an erster Stelle. Sie wollen alles richtig machen. Der Protagonist des Films (Teo) und seine Frau Mia haben jedoch unterschiedliche Vorstellung davon, was das Richtige ist und auch nach dem Tod ihres Kindes haben sie unterschiedliche Bew{\"a}ltigungsstrategien, um mit diesem Schicksalsschlag umzugehen. Einer der Gr{\"u}nde, warum 80\% der Ehepaare sich nach so einem Schicksalsschlag trennen liegt in genau dieser Problematik, weswegen es wichtig ist, diese Thematik zu beleuchten.}, language = {de} } @article{Kleefeld2021, author = {Kleefeld, Andreas}, title = {The hot spots conjecture can be false: some numerical examples}, series = {Advances in Computational Mathematics}, volume = {47}, journal = {Advances in Computational Mathematics}, publisher = {Springer}, address = {Dordrecht}, issn = {1019-7168}, doi = {10.1007/s10444-021-09911-5}, year = {2021}, abstract = {The hot spots conjecture is only known to be true for special geometries. This paper shows numerically that the hot spots conjecture can fail to be true for easy to construct bounded domains with one hole. The underlying eigenvalue problem for the Laplace equation with Neumann boundary condition is solved with boundary integral equations yielding a non-linear eigenvalue problem. Its discretization via the boundary element collocation method in combination with the algorithm by Beyn yields highly accurate results both for the first non-zero eigenvalue and its corresponding eigenfunction which is due to superconvergence. Additionally, it can be shown numerically that the ratio between the maximal/minimal value inside the domain and its maximal/minimal value on the boundary can be larger than 1 + 10- 3. Finally, numerical examples for easy to construct domains with up to five holes are provided which fail the hot spots conjecture as well.}, language = {en} } @masterthesis{Jonas2021, type = {Bachelor Thesis}, author = {Jonas, Eva Johanna}, title = {The future of work: How to create a better User Experience for distributed workforce}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {213 Seiten}, year = {2021}, abstract = {Die Nachfrage nach flexiblen Arbeitsmodellen und damit Remote Work steigt und wird zunehmend zum Kriterium bei der Jobauswahl. Trotz der vielen Vorteile gibt es in der „Remote-Arbeitswelt" aber immer noch einige Herausforderungen. Remote Arbeitende haben eine andere, teils nachteilige Erfahrung gegen{\"u}ber Kollegen vor Ort. Um daf{\"u}r eine nutzerzentrierte L{\"o}sung zu finden, lag der Fokus bei dieser Arbeit auf den Auswirkungen und Bed{\"u}rfnissen des arbeitenden Menschen. Basierend hierauf wurde ein Dienstleistungsservice konzipiert. Dieser unterst{\"u}tzt Unternehmen, Selbstst{\"a}ndige und Mitarbeitende durch passende Angebote und Dienstleistungen in den Bereichen Ausstattung, Technik, Gesundheit, Corporate Benefits u.{\"A}. Dies erm{\"o}glicht auch Arbeitgebenden Aufgaben auszulagern und die Attraktivit{\"a}t und Konkurrenzf{\"a}higkeit auf dem Arbeitsmarkt zu steigern. Das wird zuk{\"u}nftig im „war for digitals talents" immer wichtiger werden.}, language = {de} } @article{WaldvogelRitzmannFreyleretal.2021, author = {Waldvogel, Janice and Ritzmann, Ramona and Freyler, Kathrin and Helm, Michael and Monti, Elena and Albracht, Kirsten and St{\"a}udle, Benjamin and Gollhofer, Albert and Narici, Marco}, title = {The Anticipation of Gravity in Human Ballistic Movement}, series = {Frontiers in Physiology}, journal = {Frontiers in Physiology}, publisher = {Frontiers}, address = {Lausanne}, issn = {1664-042X}, doi = {10.3389/fphys.2021.614060}, year = {2021}, abstract = {Stretch-shortening type actions are characterized by lengthening of the pre-activated muscle-tendon unit (MTU) in the eccentric phase immediately followed by muscle shortening. Under 1 g, pre-activity before and muscle activity after ground contact, scale muscle stiffness, which is crucial for the recoil properties of the MTU in the subsequent push-off. This study aimed to examine the neuro-mechanical coupling of the stretch-shortening cycle in response to gravity levels ranging from 0.1 to 2 g. During parabolic flights, 17 subjects performed drop jumps while electromyography (EMG) of the lower limb muscles was combined with ultrasound images of the gastrocnemius medialis, 2D kinematics and kinetics to depict changes in energy management and performance. Neuro-mechanical coupling in 1 g was characterized by high magnitudes of pre-activity and eccentric muscle activity allowing an isometric muscle behavior during ground contact. EMG during pre-activity and the concentric phase systematically increased from 0.1 to 1 g. Below 1 g the EMG in the eccentric phase was diminished, leading to muscle lengthening and reduced MTU stretches. Kinetic energy at take-off and performance were decreased compared to 1 g. Above 1 g, reduced EMG in the eccentric phase was accompanied by large MTU and muscle stretch, increased joint flexion amplitudes, energy loss and reduced performance. The energy outcome function established by linear mixed model reveals that the central nervous system regulates the extensor muscles phase- and load-specifically. In conclusion, neuro-mechanical coupling appears to be optimized in 1 g. Below 1 g, the energy outcome is compromised by reduced muscle stiffness. Above 1 g, loading progressively induces muscle lengthening, thus facilitating energy dissipation.}, language = {en} } @article{HeinkeKnickerAlbracht2021, author = {Heinke, Lars N. and Knicker, Axel J. and Albracht, Kirsten}, title = {Test-retest reliability of the internal shoulder rotator muscles' stretch reflex in healthy men}, series = {Journal of Electromyography and Kinesiology}, volume = {62}, journal = {Journal of Electromyography and Kinesiology}, number = {Article 102611}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1050-6411}, doi = {10.1016/j.jelekin.2021.102611}, year = {2021}, abstract = {Until now the reproducibility of the short latency stretch reflex of the internal rotator muscles of the glenohumeral joint has not been identified. Twenty-three healthy male participants performed three sets of external shoulder rotation stretches with various pre-activation levels on two different dates of measurement to assess test-retest reliability. All stretches were applied with a dynamometer acceleration of 104°/s2 and a velocity of 150°/s. Electromyographical response was measured via surface EMG. Reflex latencies showed a pre-activation effect (ƞ2 = 0,355). ICC ranged from 0,735 to 0,909 indicating an overall "good" relative reliability. SRD 95\% lay between ±7,0 to ±12,3 ms.. The reflex gain showed overall poor test-retest reproducibility. The chosen methodological approach presented a suitable test protocol for shoulder muscles stretch reflex latency evaluation. A proof-of-concept study to validate the presented methodical approach in shoulder involvement including subjects with clinically relevant conditions is recommended.}, language = {en} } @article{Gaigall2021, author = {Gaigall, Daniel}, title = {Test for Changes in the Modeled Solvency Capital Requirement of an Internal Risk Model}, series = {ASTIN Bulletin}, volume = {51}, journal = {ASTIN Bulletin}, number = {3}, publisher = {Cambridge Univ. Press}, address = {Cambridge}, issn = {1783-1350}, doi = {10.1017/asb.2021.20}, pages = {813 -- 837}, year = {2021}, abstract = {In the context of the Solvency II directive, the operation of an internal risk model is a possible way for risk assessment and for the determination of the solvency capital requirement of an insurance company in the European Union. A Monte Carlo procedure is customary to generate a model output. To be compliant with the directive, validation of the internal risk model is conducted on the basis of the model output. For this purpose, we suggest a new test for checking whether there is a significant change in the modeled solvency capital requirement. Asymptotic properties of the test statistic are investigated and a bootstrap approximation is justified. A simulation study investigates the performance of the test in the finite sample case and confirms the theoretical results. The internal risk model and the application of the test is illustrated in a simplified example. The method has more general usage for inference of a broad class of law-invariant and coherent risk measures on the basis of a paired sample.}, language = {en} } @masterthesis{Zosgornik2021, type = {Bachelor Thesis}, author = {Zosgornik, Julia}, title = {Tempor{\"a}rer, mobiler Lebensraum: ein Wohnkonzept f{\"u}r Tinyhouses aus alten, ungenutzten Bahnwaggons}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {99 Seiten}, year = {2021}, abstract = {Das Olympiagel{\"a}nde in M{\"u}nchen wurde im Jahre 1972 durch die M{\"u}nchener S-Bahn erreichbar. Nach der Nutzung w{\"a}hrend der Olympischen Spiele wurde die Strecke weiterhin von der Linie S3angefahren, aber schließlich 1988 stillgelegt und steht seither unter Denkmalschutz. Das umfassende Gel{\"a}nde ist bis heute gut ausgebaut und bietet viel Raum f{\"u}r Freizeitaktivit{\"a}ten. Nun bietet sich dieser Standort f{\"u}r ein neues Wohnkonzept an. Aus alten, nicht mehr nutzbaren Bahnwaggons entstehen Tinyhouse-Module. Aus dem alten Olympiabahnhof der S3 wird ein neues Viertel f{\"u}r junge Leute, Studenten und alle anderen, die sich vorstellen k{\"o}nnen in einem Tinyhouse zu wohnen.}, language = {de} } @article{SeefeldtDachwald2021, author = {Seefeldt, Patric and Dachwald, Bernd}, title = {Temperature increase on folded solar sail membranes}, series = {Advances in Space Research}, volume = {67}, journal = {Advances in Space Research}, number = {9}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0273-1177}, doi = {10.1016/j.asr.2020.09.026}, pages = {2688 -- 2695}, year = {2021}, language = {en} } @masterthesis{Dressen2021, type = {Bachelor Thesis}, author = {Dreßen, Samira}, title = {Teach and Learn-Platform: eine Applikation f{\"u}r Bildungseinrichtungen, Sch{\"u}ler und Studenten}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {198 Seiten}, year = {2021}, abstract = {Die Applikation „Slot" ist eine lehrbegleitende Kommunikations- und Kooperationsplattform, die eine zeitgem{\"a}ße Lehre, Studienorganisation und Pr{\"a}sentation zul{\"a}sst. Slot dient dabei nicht nur als Hilfestellung f{\"u}r Lehrende und Lernende, sondern erm{\"o}glicht auch die vollst{\"a}ndige Durchf{\"u}hrung von effizientem Unterricht. Den Lernenden soll maximale Kontrolle zur Erarbeitung ihres Wissens und {\"U}bersichtlichkeit in der Kommunikation geboten werden. Um f{\"u}r die unterschiedlichen Nutzergruppen ein benutzerfreundliches System zu schaffen, steht eine breitgef{\"a}cherte Funktionsauswahl zur Verf{\"u}gung: Videochat, Messenger, VR-Raum, Whiteboard, Aufgaben{\"u}bersicht, Datenabgabe, Kalender, Profil und ToDo-List. Die Nutzungsm{\"o}glichkeiten k{\"o}nnen individuell auf die unterschiedlichen Nutzergruppen und deren entsprechenden Bed{\"u}rfnissen angepasst werden.}, language = {de} } @masterthesis{Holtschlag2021, type = {Bachelor Thesis}, author = {Holtschlag, Uli}, title = {tape foundry: Eine Distribubutionsplattform f{\"u}r studentische Schriften}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {55 Seiten}, year = {2021}, abstract = {Die »tape foundry« ist eine interdisziplin{\"a}re Distributionsplattform f{\"u}r studentische Schriften, die Studierende auf dem großen Type-Design Markt neu platziert und einen Raum zur Entfaltung gibt. Besonders durch Instagram ist die heutige Type-Designszene gr{\"o}ßer denn je und viele Entw{\"u}rfe gehen in der Maße unter. Um diesem Ph{\"a}nomen entgegenzuwirken wurde die »tape foundry« ins Leben gerufen. Sie versucht mit der Kombination aus Fotografie, Type Design und der Funktion als Kassettenlabel neue interdisziplin{\"a}re Wege zu gehen, um sich von der klassischen {\"A}sthetik abzusetzen. Die Webseite stellt sich bewusst gegen g{\"a}ngige UX/UI Standards und setzt auf neue Nutzungsprinzipien kombiniert mit einer lauten kontrastreichen Bildwelt.}, language = {de} } @article{LeiseEsserEichenlaubetal.2021, author = {Leise, Philipp and Eßer, Arved and Eichenlaub, Tobias and Schleiffer, Jean-Eric and Altherr, Lena and Rinderknecht, Stephan and Pelz, Peter F.}, title = {Sustainable system design of electric powertrains - comparison of optimization methods}, series = {Engineering Optimization}, journal = {Engineering Optimization}, publisher = {Taylor \& Francis}, address = {London}, issn = {0305-215X}, doi = {10.1080/0305215X.2021.1928660}, year = {2021}, abstract = {The transition within transportation towards battery electric vehicles can lead to a more sustainable future. To account for the development goal 'climate action' stated by the United Nations, it is mandatory, within the conceptual design phase, to derive energy-efficient system designs. One barrier is the uncertainty of the driving behaviour within the usage phase. This uncertainty is often addressed by using a stochastic synthesis process to derive representative driving cycles and by using cycle-based optimization. To deal with this uncertainty, a new approach based on a stochastic optimization program is presented. This leads to an optimization model that is solved with an exact solver. It is compared to a system design approach based on driving cycles and a genetic algorithm solver. Both approaches are applied to find efficient electric powertrains with fixed-speed and multi-speed transmissions. Hence, the similarities, differences and respective advantages of each optimization procedure are discussed.}, language = {en} } @inproceedings{Huening2021, author = {H{\"u}ning, Felix}, title = {Sustainable changes beyond covid-19 for a second semester physics course for electrical engineering students}, series = {Blended Learning in Engineering Education: challenging, enlightening - and lasting?}, booktitle = {Blended Learning in Engineering Education: challenging, enlightening - and lasting?}, isbn = {978-2-87352-023-6}, pages = {1424 -- 1428}, year = {2021}, abstract = {The course Physics for Electrical Engineering is part of the curriculum of the bachelor program Electrical Engineering at University of Applied Science Aachen. Before covid-19 the course was conducted in a rather traditional way with all parts (lecture, exercise and lab) face-to-face. This teaching approach changed fundamentally within a week when the covid-19 limitations forced all courses to distance learning. All parts of the course were transformed to pure distance learning including synchronous and asynchronous parts for the lecture, live online-sessions for the exercises and self-paced labs at home. Using these methods, the course was able to impart the required knowledge and competencies. Taking the teacher's observations of the student's learning behaviour and engagement, the formal and informal feedback of the students and the results of the exams into account, the new methods are evaluated with respect to effectiveness, sustainability and suitability for competence transfer. Based on this analysis strong and weak points of the concept and countermeasures to solve the weak points were identified. The analysis further leads to a sustainable teaching approach combining synchronous and asynchronous parts with self-paced learning times that can be used in a very flexible manner for different learning scenarios, pure online, hybrid (mixture of online and presence times) and pure presence teaching.}, language = {en} } @inproceedings{PfeifferBalcGebhardt2021, author = {Pfeiffer, Johann and Balc, N. and Gebhardt, Andreas}, title = {Studie zur Untersuchung der Auswirkung von Fr{\"a}sbahnstrategien auf die Oberfl{\"a}chenqualit{\"a}t von mittels SLM gefertigten Metallteilen}, series = {Tagungsband 21. Nachwuchswissenschaftler*innenkonferenz}, booktitle = {Tagungsband 21. Nachwuchswissenschaftler*innenkonferenz}, publisher = {Verlag Ernst-Abbe-Hochschule Jena}, address = {Jena}, isbn = {978-3-932886-36-2}, pages = {99 -- 102}, year = {2021}, abstract = {F{\"u}r die Herstellung von metallischen Bauteilen wird in der heutigen Zeit eine Vielzahl von Verfahren auf dem Markt angeboten. Dabei stehen die additiven im Wettbewerb zu den konventionellen Verfahren. Die erreichbaren Oberfl{\"a}chenqualit{\"a}ten der additiven sind nicht mit denen spanender Verfahren vergleichbar. F{\"u}r diesen Beitrag wurde analysiert, ob sich ein mittels Selektivem Laserschmelzen (SLM) additiv hergestellter Edelstahl hinsichtlich seiner Oberfl{\"a}chenqualit{\"a}t nach der Zerspanung von einem umgeformten konventionell hergestellten Edelstahl gleicher Sorte unterscheidet.}, language = {de} } @incollection{PfetschAbeleAltherretal.2021, author = {Pfetsch, Marc E. and Abele, Eberhard and Altherr, Lena and B{\"o}lling, Christian and Br{\"o}tz, Nicolas and Dietrich, Ingo and Gally, Tristan and Geßner, Felix and Groche, Peter and Hoppe, Florian and Kirchner, Eckhard and Kloberdanz, Hermann and Knoll, Maximilian and Kolvenbach, Philip and Kuttich-Meinlschmidt, Anja and Leise, Philipp and Lorenz, Ulf and Matei, Alexander and Molitor, Dirk A. and Niessen, Pia and Pelz, Peter F. and Rexer, Manuel and Schmitt, Andreas and Schmitt, Johann M. and Schulte, Fiona and Ulbrich, Stefan and Weigold, Matthias}, title = {Strategies for mastering uncertainty}, series = {Mastering uncertainty in mechanical engineering}, booktitle = {Mastering uncertainty in mechanical engineering}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-78353-2}, doi = {10.1007/978-3-030-78354-9_6}, pages = {365 -- 456}, year = {2021}, abstract = {This chapter describes three general strategies to master uncertainty in technical systems: robustness, flexibility and resilience. It builds on the previous chapters about methods to analyse and identify uncertainty and may rely on the availability of technologies for particular systems, such as active components. Robustness aims for the design of technical systems that are insensitive to anticipated uncertainties. Flexibility increases the ability of a system to work under different situations. Resilience extends this characteristic by requiring a given minimal functional performance, even after disturbances or failure of system components, and it may incorporate recovery. The three strategies are described and discussed in turn. Moreover, they are demonstrated on specific technical systems.}, language = {en} } @article{JildehWagnerSchoening2021, author = {Jildeh, Zaid B. and Wagner, Patrick H. and Sch{\"o}ning, Michael Josef}, title = {Sterilization of Objects, Products, and Packaging Surfaces and Their Characterization in Different Fields of Industry: The Status in 2020}, series = {physica status solidi (a) applications and materials science}, volume = {218}, journal = {physica status solidi (a) applications and materials science}, number = {13}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1862-6319}, doi = {10.1002/pssa.202000732}, pages = {27 Seiten}, year = {2021}, abstract = {The treatment method to deactivate viable microorganisms from objects or products is termed sterilization. There are multiple forms of sterilization, each intended to be applied for a specific target, which depends on—but not limited to—the thermal, physical, and chemical stability of that target. Herein, an overview on the currently used sterilization processes in the global market is provided. Different sterilization techniques are grouped under a category that describes the method of treatment: radiation (gamma, electron beam, X-ray, and ultraviolet), thermal (dry and moist heat), and chemical (ethylene oxide, ozone, chlorine dioxide, and hydrogen peroxide). For each sterilization process, the typical process parameters as defined by regulations and the mode of antimicrobial activity are summarized. Finally, the recommended microorganisms that are used as biological indicators to validate sterilization processes in accordance with the rules that are established by various regulatory agencies are summarized.}, language = {en} } @inproceedings{KohlSchmidtsKloeseretal.2021, author = {Kohl, Philipp and Schmidts, Oliver and Kl{\"o}ser, Lars and Werth, Henri and Kraft, Bodo and Z{\"u}ndorf, Albert}, title = {STAMP 4 NLP - an agile framework for rapid quality-driven NLP applications development}, series = {Quality of Information and Communications Technology. QUATIC 2021}, booktitle = {Quality of Information and Communications Technology. QUATIC 2021}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-85346-4}, doi = {10.1007/978-3-030-85347-1_12}, pages = {156 -- 166}, year = {2021}, abstract = {The progress in natural language processing (NLP) research over the last years, offers novel business opportunities for companies, as automated user interaction or improved data analysis. Building sophisticated NLP applications requires dealing with modern machine learning (ML) technologies, which impedes enterprises from establishing successful NLP projects. Our experience in applied NLP research projects shows that the continuous integration of research prototypes in production-like environments with quality assurance builds trust in the software and shows convenience and usefulness regarding the business goal. We introduce STAMP 4 NLP as an iterative and incremental process model for developing NLP applications. With STAMP 4 NLP, we merge software engineering principles with best practices from data science. Instantiating our process model allows efficiently creating prototypes by utilizing templates, conventions, and implementations, enabling developers and data scientists to focus on the business goals. Due to our iterative-incremental approach, businesses can deploy an enhanced version of the prototype to their software environment after every iteration, maximizing potential business value and trust early and avoiding the cost of successful yet never deployed experiments.}, language = {en} } @masterthesis{Sorgalla2021, type = {Bachelor Thesis}, author = {Sorgalla, Jonas}, title = {Skidio - die digitale Transformation der Kosmetikindustrie : die Entwicklung eines digitalen Vertriebskanals}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {159 Seiten}, year = {2021}, abstract = {Skidio basiert dabei auf dem Konzept, dass das Video f{\"u}r die Kosmetikindustrie das optimale Medium f{\"u}r Produktvorstellungen ist. Der Ausgangspunkt f{\"u}r das Einkaufserlebnis des Nutzers ist daher ein Video-Feed, bestehend aus Kurz- und Live-Videos, die einen direkten Kauf der gezeigten Produkte erm{\"o}glichen. So entsteht ein Ort, an dem Nutzer auf eine unterhaltsame Art und Weise Inspiration f{\"u}r die eigene Hautpflege finden k{\"o}nnen. Dabei ist das Video als Medium nicht nur unterhaltsamer, sondern zugleich auch deutlich informativer als klassische Produktlistings. Die Produktpr{\"a}sentation wird interaktiver, erlebbarer und deutlich effektiver. Gemeinsam mit Technologien wie einer digitalen Hautanalyse, wird so das Potenzial des E-Commerce f{\"u}r die Beautyindustrie vollst{\"a}ndig entfaltet.}, language = {de} } @inproceedings{OlderogMohrBegingetal.2021, author = {Olderog, M. and Mohr, P. and Beging, Stefan and Tsoumpas, C. and Ziemons, Karl}, title = {Simulation study on the role of tissue-scattered events in improving sensitivity for a compact time of flight compton positron emission tomograph}, series = {2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)}, booktitle = {2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)}, publisher = {IEEE}, address = {New York, NY}, isbn = {978-1-7281-7693-2}, doi = {10.1109/NSS/MIC42677.2020.9507901}, pages = {4 Seiten}, year = {2021}, abstract = {In positron emission tomography improving time, energy and spatial detector resolutions and using Compton kinematics introduces the possibility to reconstruct a radioactivity distribution image from scatter coincidences, thereby enhancing image quality. The number of single scattered coincidences alone is in the same order of magnitude as true coincidences. In this work, a compact Compton camera module based on monolithic scintillation material is investigated as a detector ring module. The detector interactions are simulated with Monte Carlo package GATE. The scattering angle inside the tissue is derived from the energy of the scattered photon, which results in a set of possible scattering trajectories or broken line of response. The Compton kinematics collimation reduces the number of solutions. Additionally, the time of flight information helps localize the position of the annihilation. One of the questions of this investigation is related to how the energy, spatial and temporal resolutions help confine the possible annihilation volume. A comparison of currently technically feasible detector resolutions (under laboratory conditions) demonstrates the influence on this annihilation volume and shows that energy and coincidence time resolution have a significant impact. An enhancement of the latter from 400 ps to 100 ps leads to a smaller annihilation volume of around 50\%, while a change of the energy resolution in the absorber layer from 12\% to 4.5\% results in a reduction of 60\%. The inclusion of single tissue-scattered data has the potential to increase the sensitivity of a scanner by a factor of 2 to 3 times. The concept can be further optimized and extended for multiple scatter coincidences and subsequently validated by a reconstruction algorithm.}, language = {en} } @inproceedings{ElMoussaouiKassmiAlexopoulosetal.2021, author = {El Moussaoui, Noureddine and Kassmi, Khalil and Alexopoulos, Spiros and Schwarzer, Klemens and Chayeb, Hamid and Bachiri, Najib}, title = {Simulation studies on a new innovative design of a hybrid solar distiller MSDH alimented with a thermal and photovoltaic energy}, series = {Materialstoday: Proceedings}, volume = {45}, booktitle = {Materialstoday: Proceedings}, number = {8}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2214-7853}, doi = {10.1016/j.matpr.2021.03.115}, pages = {7653 -- 7660}, year = {2021}, abstract = {In this paper, we present the structure, the simulation the operation of a multi-stage, hybrid solar desalination system (MSDH), powered by thermal and photovoltaic (PV) (MSDH) energy. The MSDH system consists of a lower basin, eight horizontal stages, a field of four flat thermal collectors with a total area of 8.4 m2, 3 Kw PV panels and solar batteries. During the day the system is heated by thermal energy, and at night by heating resistors, powered by solar batteries. These batteries are charged by the photovoltaic panels during the day. More specifically, during the day and at night, we analyse the temperature of the stages and the production of distilled water according to the solar irradiation intensity and the electric heating power, supplied by the solar batteries. The simulations were carried out in the meteorological conditions of the winter month (February 2020), presenting intensities of irradiance and ambient temperature reaching 824 W/m2 and 23 °C respectively. The results obtained show that during the day the system is heated by the thermal collectors, the temperature of the stages and the quantity of water produced reach 80 °C and 30 Kg respectively. At night, from 6p.m. the system is heated by the electric energy stored in the batteries, the temperature of the stages and the quantity of water produced reach respectively 90 °C and 104 Kg for an electric heating power of 2 Kw. Moreover, when the electric power varies from 1 Kw to 3 Kw the quantity of water produced varies from 92 Kg to 134 Kg. The analysis of these results and their comparison with conventional solar thermal desalination systems shows a clear improvement both in the heating of the stages, by 10\%, and in the quantity of water produced by a factor of 3.}, language = {en} }