@inproceedings{BresslerMohnke2023, author = {Breßler, Janine and Mohnke, Janett}, title = {Can a Humanoid Robot Motivate Children to Read More? Yes, It Can!}, series = {Learning and Collaboration Technologies : 10th International Conference, LCT 2023, Held as Part of the 25th HCI International Conference, HCII 2023, Copenhagen, Denmark, July 23-28, 2023, Proceedings, Part II}, booktitle = {Learning and Collaboration Technologies : 10th International Conference, LCT 2023, Held as Part of the 25th HCI International Conference, HCII 2023, Copenhagen, Denmark, July 23-28, 2023, Proceedings, Part II}, publisher = {Springer, Cham}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-21148}, pages = {271 -- 286}, year = {2023}, abstract = {The ability to read and write is an important requirement for an active participation in social life - maybe even the most important one. It is a prerequisite for education and in most cases also for professional success. So, it is important, that children learn how to read. In this paper, a case study is presented which investigates the question how humanoid robots can support the motivation of children to read. For this, we considered the following questions: Can humanoid robots, like the NAO robot from Aldebaran Robotics, motivate children to read more and with pleasure? Is there a setup which is technically stable enough to work outside a lab environment and without developer support? The underlying project uses children's curiosity about humanoid robots to create an exciting learning experience. The idea can be summarized as follows: Children read to a NAO robot and communicate to the robot about the content of the book. What started as a research project is now an application that is readily used in several public libraries in Germany. Currently, our so-called Reading-NAO can interact in German and in English. The paper also introduces the idea, its realization, practical experiences and future plans for the project.}, language = {en} } @inproceedings{GrossKuhlStephanetal.2023, author = {Gross, Matthias and Kuhl, Thorsten and Stephan, Frank and Li, Xiangkun and Philipp, Sebastian and Grebinyk, Anna and Khachatryan, Vitali and Qian, Houjun and Aboulbanine, Zakaria and Amirkhanyan, Zohrab and Riemer, Felix and Oppelt, Anne and Krasilnikov, Mikhail}, title = {A beam line setup for flash radiation therapy with focused electron beams at the Pitz facility at DESY in Zeuthen: basic concept and dosimetry simulations}, series = {IPAC'23 : 14th International Particle Accelerator Conference, 7-12 May 2023, Venice, Italy : proceedings}, booktitle = {IPAC'23 : 14th International Particle Accelerator Conference, 7-12 May 2023, Venice, Italy : proceedings}, editor = {Istituto Nazionale Di Fisca Nucleare,}, publisher = {JACoW Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-21132}, pages = {5000 -- 5003}, year = {2023}, abstract = {The aim of this work is to demonstrate the principal possibility to enhance the electron beam dose deposition in the depth of the sample for radiation therapy purposes. Trains of electron bunches of 22 MeV generated at PITZ are focused inside the sample using a dedicated fast deflector and a solenoid magnet. To explore the capabilities of the proposed setup, dose distributions are calculated for multiple electron bunches focused in a single point inside a water phantom. Electron beam focusing produces dose peaks with a tunable maximal dose depth which is interesting for healthy tissue sparing at the surface and enhancing treatment quality. The duration of the full bunch train is 1 ms. During this time interval, the FLASH effect could be efficiently triggered inside the irradiated target volume. Monte Carlo simulations based on the FLUKA code were performed to evaluate the depth dose curves distributions in a water phantom. Using the PITZ electron beam parameters, simulations have shown the possibility to produce a peak dose in water seven times higher than compared to the dose at the surface. Moreover, the RMS size homogeneous area around the maximal dose is approximately 25 mm.}, language = {en} } @inproceedings{GrossHoffmannGeorgievetal.2023, author = {Gross, Matthias and Hoffmann, Andreas and Georgiev, Georgi and Kuhl, Thorsten and Li, Xiangkun and Oppelt, Anne and Boonpornprasert, Prach and Philipp, Sebastian and Grebinyk, Anna and Vashchenko, Grygorii and Aftab, Namra and Adhikari, Gowri and Richard, Christopher and Stephan, Frank and Khachatryan, Vitali and Riemer, Felix and Krasilnikov, Mikhail and Amirkhanyan, Zohrab}, title = {Comparison of measurements and simulation results of dose for the FLASH radiation therapy beamline at PITZ}, series = {IPAC'23 : 14th International Particle Accelerator Conference, 7-12 May 2023, Venice, Italy : proceedings}, booktitle = {IPAC'23 : 14th International Particle Accelerator Conference, 7-12 May 2023, Venice, Italy : proceedings}, editor = {Istituto Nazionale Di Fisca Nucleare,}, publisher = {JACoW Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-21126}, pages = {4996 -- 4999}, year = {2023}, abstract = {The high-brightness electron beam at the Photo Injector Test facility at DESY in Zeuthen (PITZ) is now also used for FLASHlab@PITZ: an R\&D platform for studying radiation biology and the FLASH effect in radiation therapy. The available parameter space of the electron beam with a momentum of 22 MeV/c allows bunch charges from 10 pC up to 5nC, bunch durations of 0.1-60ps, and bunch train lengths up to 1 ms. The number of bunches in the single train can currently be varied between 1 and 1000 bunches, with an upgrade to 4500 foreseen in 2023. Radiation biology studies require accurate dose prediction, therefore Monte Carlo simulations based on the FLUKA code were performed. According to estimations, dose delivery of 0.002 Gy (low charge case 0.1pC) and 10Gy (high charge case 5nC) is possible, if the beam is confined to a circular area with a radius of 5 mm with a lead collimator. For the Monte Carlo simulations, the experimental setup was accurately modeled, including the exit window, lead collimator, etc. Dose measurements were used to compare simulations with experiments. Dose profiles were experimentally measured with Gafchromic films and then compared with Monte Carlo simulations. The first experiments at FLASHlab@PITZ in 2023 have demonstrated flexible dose options for studying the FLASH effect and radiation biology studies.}, language = {en} } @inproceedings{KrasilnikovAboulbanineAdhikarietal.2023, author = {Krasilnikov, Mikhail and Aboulbanine, Zakaria and Adhikari, Gowri and Aftab, Namra and Asoyan, Aida and Davtyan, Hakob and Georgiev, Georgi and Good, James and Grebinyk, Anna and Gross, Matthias and Hoffmann, Andreas and Kongmon, Ekkachai and Li, Xiangkun and Lueangaramwong, Anusorn and Melkumyan, David and Mohanty, Sandeep and Niemczyk, Raffael and Oppelt, Anne and Qian, Houjun and Richard, Christopher and Schneidmiller, Evgeny and Stephan, Frank and Vashchenko, Grygorii}, title = {THz SASE FEL at PITZ: lasing at a wavelength of 100μm}, series = {IPAC'23 : 14th International Particle Accelerator Conference, 7-12 May 2023, Venice, Italy : proceedings}, booktitle = {IPAC'23 : 14th International Particle Accelerator Conference, 7-12 May 2023, Venice, Italy : proceedings}, editor = {Istituto Nazionale Di Fisca Nucleare,}, publisher = {JACoW Publishing}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-21113}, pages = {3948 -- 3951}, year = {2023}, abstract = {Development of an accelerator-based tunable THz source prototype for pump-probe experiments at the European XFEL is ongoing at the Photo Injector Test facility at DESY in Zeuthen (PITZ). The proof-of-principle experiments on the THz SASE FEL are performed utilizing the LCLS-I undulator installed in the PITZ beamline. The first lasing at a center wavelength of 100 µm was observed in the summer of 2022. The lasing of the narrowband THz source was achieved using an electron beam with an energy of ~17 MeV and a bunch charge up to several nC. Optimization of beam transport and matching resulted in the measurement of THz radiation with a pulse energy of tens of µJ, measured with pyroelectric detectors. The THz FEL gain curves were measured by means of specially designed short coils along the undulator. The results of the first characterization of the THz source at PITZ will be presented.}, language = {en} } @unpublished{KleinsorgeKupperFaucketal.2023, author = {Kleinsorge, Alexander and Kupper, Stefan and Fauck, Alexander and Rothe, Felix}, title = {ELRA: Exponential learning rate adaption gradient descent optimization method}, publisher = {arXiv.org}, issn = {2331-8422}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-20839}, year = {2023}, abstract = {We present a novel, fast (exponential rate adaption), ab initio (hyper-parameter-free) gradient based optimizer algorithm. The main idea of the method is to adapt the learning rate α by situational awareness, mainly striving for orthogonal neighboring gradients. The method has a high success and fast convergence rate and does not rely on hand-tuned parameters giving it greater universality. It can be applied to problems of any dimensions n and scales only linearly (of order O(n)) with the dimension of the problem. It optimizes convex and non-convex continuous landscapes providing some kind of gradient. In contrast to the Ada-family (AdaGrad, AdaMax, AdaDelta, Adam, etc.) the method is rotation invariant: optimization path and performance are independent of coordinate choices. The impressive performance is demonstrated by extensive experiments on the MNIST benchmark data-set against state-of-the-art optimizers. We name this new class of optimizers after its core idea Exponential Learning Rate Adaption - ELRA. We present it in two variants c2min and p2min with slightly different control. The authors strongly believe that ELRA will open a completely new research direction for gradient descent optimize.}, language = {en} } @inproceedings{PeuschkeBischofKubica2023, author = {Peuschke-Bischof, Tobias and Kubica, Stefan}, title = {A Fictitious Vehicle Manufacturing Company at a University as Interdisciplinary Framework to Combine Study Programs}, series = {Education and New Developments 2023 : Volume II}, booktitle = {Education and New Developments 2023 : Volume II}, editor = {Carmo, Mafalda}, publisher = {inScience Press}, address = {Lisbon}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-20213}, pages = {429 -- 433}, year = {2023}, abstract = {Interdisciplinary thinking is becoming an increasingly important competence for meeting the challenges of our time, for example in the areas of sustainability or even digitalization. Successful value creation can only be achieved if all subject disciplines work together. Universities, too, must adapt to these needs and anchor the teaching of these competencies in their courses of study. In this context, interdisciplinary cooperation cannot be limited to the curricula, but must also bring together the teachers and the learners in a common context. Traditionally, universities have found it difficult to develop interdisciplinary scenarios. The teaching scenarios themselves must already provide interdisciplinary content and learning objectives. The challenge here is multi-level. First, it is a great challenge to connect the modules of a course of study in a thematically meaningful way. Second, it is the linking with other study programs that brings about the most sustainable interdisciplinary effects. One possible solution, which has been tested for several years, is to set up a fictitious company as a digital learning factory, which serves as a basis and reference for the interlinking of individual modules of the various courses of study. The scenarios that can be depicted here are extremely application-oriented, which means that not only can internal university modules be very easily aligned with them, but external partners, can also get a simple participation. Furthermore, the participating courses of study can continue to maintain their original core competencies while participating in the interdisciplinary scenarios via the modules that are aligned accordingly with the learning factory. A company from the vehicle construction sector was selected as the business model in order to be able to map another focus at the same time, autonomous driving. The individual departments of the company are linked professionally with the contents of the individual courses of study. Study programs, such as industrial engineering, form the design department, whereas technology-oriented study programs, such as business computing, represent technical development, in particular the area of driver assistance system development. In addition, the relevant departments also include economics and so on. The special feature, however, is the fact that real products in the form of vehicles on a scale of 1:14 are also created and continuously developed, which is an important success factor of the learning factory. The following article transfers the experiences made into a scheme of different levels of interdisciplinary forms of teaching within the framework of the learning factory and classifies and explains the existing scenarios accordingly. Furthermore, the teaching formats used, which have proven to be effective in imparting competences, are described.}, language = {en} } @article{HerkenhoffBattistiniPraiaetal.2023, author = {Herkenhoff, Marcos Edgar and Battistini, Carolina and Praia, Ana Beatriz and Rossini, Bruno Cesar and dos Santos, Lucilene Delazari and Br{\"o}del, Oliver and Frohme, Marcus and Saad, Susana Marta Isay}, title = {The combination of omics strategies to evaluate starter and probiotic strains in the Catharina sour Brazilian-style beer}, series = {Food Research International}, volume = {167}, journal = {Food Research International}, publisher = {Elsevier}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19858}, year = {2023}, abstract = {Catharina sour, the first internationally recognized Brazilian beer, is characterized by fermentation with lactic acid bacteria (LAB), which may have probiotic potential, and the addition of fruit juice. This study aimed to evaluate the use of the starter Streptococcus thermophilus TH-4 (TH-4) and the probiotics Lacticaseibacillus paracasei F19 and 431, associated with Saccharomyces cerevisiae US-05, in the absence (control)/presence of passion fruit or peach juices. Evaluation proceeded during fermentation and storage by enumeration using pour-plate and qPCR; gene expressions of hop resistance; proteome by Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS); and odor, flavor, and metabolome by Headspace Solid-Phase Microextraction (HS-SPME), coupled with the gas chromatography-mass spectrometry (GC-MS) analysis. We concluded that the strains studied are recommended for applications in sour beers, due to the presence of defense mechanisms like membrane adhesion and H+ pump. Furthermore, HS-SPME/GC-MS indicated that the strains may contribute to the beer flavor and odor.}, language = {en} } @article{PrellReiffStephan2023, author = {Prell, Bastian and Reiff-Stephan, J{\"o}rg}, title = {A Use Case for Digital Tools in Crafts: Simulation and Virtual Reality for Carpentries}, series = {Simulation Notes Europe}, volume = {33}, journal = {Simulation Notes Europe}, number = {4}, issn = {2305-9974}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19326}, pages = {191 -- 198}, year = {2023}, abstract = {This paper presents an integrated approach to explore human factors in the craft sector. The embedded use case consists of craft workshops being 3D-modelled and simulated so that different scheduling rules can be deployed. The connected VR visualization allows craft professionals to experience scheduling rules and their impact on different performance measurements in an environ-ment intuitively resembling their actual workshops. The lessons learned from the simulation modelling are collected and presented. A modular approach appears to be beneficial for simulation modelling, offering flexibility and pragmatism but detail when needed. Apart from this anecdotal evidence, the study is accompanied by interviews. These are analyzed based on abduction grounded theory which combines a strong focus on the actual corpus of qualitative data but considers theoretical foundations, when appropriate. This paper presents the study design, and how it interties with the research approach and the use case of simulation and virtual reality for carpentries.}, language = {en} } @inproceedings{MelnykZhouSchottenetal.2023, author = {Melnyk, Sergiy and Zhou, Qiuheng and Schotten, Hans D. and R{\"u}ther-Kindel, Wolfgang and Quaeck, Fabian and Stuckert, Nick and Vilter, Robert and Gebauer, Lisa and Galkow-Schneider, Mandy and Friese, Ingo and Dr{\"u}sedow, Steffen and Pfandzelter, Tobias and Malekabbasi, Mohammadreza and Bermbach, David and Bassbouss, Louay and Zoubarev, Alexander and Neparidze, Andy and Kritzner, Arndt and Hartbrich, Jakob and Raake, Alexander and Zschau, Enrico and Schwahn, Klaus-J{\"u}rgen}, title = {6G NeXt — Joint Communication and Compute Mobile Network: Use Cases and Architecture}, series = {Kommunikation in der Automation : 14. Jahreskolloquium, 21./22.11.2023, Magdeburg}, booktitle = {Kommunikation in der Automation : 14. Jahreskolloquium, 21./22.11.2023, Magdeburg}, publisher = {Otto-von-Guericke-Universit{\"a}t Magdeburg}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19163}, pages = {10}, year = {2023}, abstract = {The research on the new generation mobile networks is currently in the phase of defining the key technologies to make 6G successful. Hereby, the research project 6G NeXt is aiming to provide a tight integration between the communication network, consisting of the radio access as well as backbone network, and processing facilities. By the concept of split computing, the processing facilities are distributed over the entire backbone network, from centralised cloud to the edge cloud at a base station. Based on two demanding use cases, Smart Drones and Hologradic Communication, we investigate a joint communication and compute architecture that will make the application of tomorrow become reality.}, language = {en} } @inproceedings{ReshetnikAlekseevaDevosetal.2023, author = {Reshetnik, Viktor and Alekseeva, Victoriia and Devos, Anastasiia and Nazaryan, Rosana and Gargin, Vitaliy and Nechyporenko, Alina}, title = {Implementation of the Uncertainty Calculation for the Detection of Negative Effect of Smoking on the Bone Density of Paranasal Sinuses}, series = {Proceedings of the 3rd International Workshop of IT-professionals on Artificial Intelligence, ProfIT AI 2023, Waterloo, Canada, November 20-22, 2023}, booktitle = {Proceedings of the 3rd International Workshop of IT-professionals on Artificial Intelligence, ProfIT AI 2023, Waterloo, Canada, November 20-22, 2023}, number = {3641}, editor = {Chumachenko, Dmytro and Kaur, Jasleen and Yakovlev, Sergiy and Morita, Plinio P.}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19140}, pages = {276 -- 283}, year = {2023}, abstract = {The aim was to implement uncertainty calculation for detecting the negative effects of smoking on the bone density of the paranasal sinus. Materials and Methods: A total of 100 male participants aged 20 to 44 were included in the study and divided into two groups. The first group comprised individuals with minimal harmful habits, while the second group consisted of individuals who had been smoking for at least 10 years, consuming 1 to 2 packs of cigarettes per day. Results Bone density has a negative impact on the bone tissue of the upper wall of the maxillary sinus. The findings suggest that individuals with a pronounced decrease in minimum density, as well as those with a marked difference between minimum and maximum density values, may require heightened medical attention due to potential associations with undiagnosed diseases or specific structural characteristics in the skull. Conclusions. The uncertainty calculation was implemented for the detection of negative effect of smoking on the bone density of paranasal sinuses. The calculated difference between maximum and minimum density during the research suggests significant medical implications, especially considering the heterogeneity of the trabecular bone structure in the skull. Individuals with a marked difference may require heightened medical attention, potentially associated with undiagnosed diseases or specific structural characteristics in the skull.}, language = {en} } @article{DreyerMotocKoehleretal.2023, author = {Dreyer, Christian and Motoc, Dana Luca and Koehler, Mathias and Goldenberg, Leonid}, title = {UV LED Curable Perfluoropolyether (PFPE)-Urethane Methacrylate Transparent Coatings for Photonic Applications: Synthesis and Characterization}, series = {Polymers}, volume = {15}, journal = {Polymers}, number = {14}, publisher = {MDPI}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19139}, pages = {1}, year = {2023}, abstract = {The contribution aims to bring forth a novel synthesis route in developing transparent UV LED-curable coatings accounting for various exposure options. A selection of perfluoropolyether (PFPE)-urethane methacrylate and acrylate resins, free-radical photo-initiator Omnirad 2100, and two distinct silane-based crosslinking agents were blended under a weight ratio of 75:20:5 (without crosslinker) and 70:15:5:10, respectively. The coatings were cured under a UV LED 4 × 3 matrix light emitting source, in a chamber under a controlled atmosphere, by means of an in-house developed conveyor belt type platform, at different conveyor belt speeds (5, 50, 150, 250, and 500 mm/s). The morphologies of fabricated coatings were characterized by FTIR revealing high conversion rates (e.g., from 98 to 100\%) for increased exposure time as a result of the 5 or 50 mm/s values, on all combinations. Dynamic-mechanical and optical properties of UV LED-cured transparent coatings were also investigated. A negative shift of the glass transition temperature values with a decrease in exposure time, in all combinations, from about 60 °C to 30 °C, along with storage moduli lowering in the glassy plateau further favors higher exposure times for curing. The refractive indices of poly-mers were from 1.38 to 1.40, whereas the thermo-optic coefficients are showing minor changes around the value of 2.55∙10-4 K-1.}, language = {en} } @inproceedings{NechyporenkoReshetnikDzyzaetal.2023, author = {Nechyporenko, Alina and Reshetnik, Viktor and Dzyza, Alla and Alekseeva, Victoriia and Lupyr, Andrii and Gargin, Vitaliy}, title = {The Peculiarities of Measuring Bone Density in Males and Females Using Uncertainty Calculation}, series = {Proceedings of the 6th International Conference on Informatics \& Data-Driven Medicine, Bratislava, Slovakia, November 17-19, 2023}, volume = {3609}, booktitle = {Proceedings of the 6th International Conference on Informatics \& Data-Driven Medicine, Bratislava, Slovakia, November 17-19, 2023}, editor = {Shakhovska, Nataliya and Kov{\´a}c, Michal and Izonin, Ivan and Chr{\´e}tien, St{\´e}phane}, publisher = {RWTH Aachen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19116}, pages = {249 -- 254}, year = {2023}, abstract = {The article discusses the approach to solving the problem of reducing time spent on the preparation of medical images for teaching neural networks, by reducing the time of creating masks for images. The task is considered on the example of processing images of the mucous membrane of the paranasal sinus. The specifics of the task did not allow effectively using existing software solutions. During the study, a software solution was proposed, which made it possible to radically reduce the time of creating masks for images. The article also analyzes the shortcomings of the automated creation of masks, as well as the directions of their solution. The loss of time due to the adjustment of the color palette can be reduced even more to 1-2 minutes, the average deviation is 7.61\%.}, language = {en} } @article{KnieKubica2023, author = {Knie, Bernhard and Kubica, Stefan}, title = {Hinreichende Spezifikation einer KI-Funktion am Beispiel Fußg{\"a}ngerschutz}, series = {Anwendungen und Konzepte der Wirtschaftsinformatik}, journal = {Anwendungen und Konzepte der Wirtschaftsinformatik}, number = {18}, publisher = {Hochschule Luzern}, issn = {2296-4592}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18410}, pages = {59 -- 64}, year = {2023}, abstract = {Transparenz und Erkl{\"a}rbarkeit sind essenzielle Faktoren bei der Entwicklung sicherer KI-Modelle f{\"u}r den Fußg{\"a}ngerschutz. Dies erm{\"o}glicht nicht nur eine verbesserte Akzeptanz, sondern f{\"o}rdert auch das Vertrauen der Nutzer in die pr{\"a}ventiven F{\"a}higkeiten dieser Systeme. Die Integration von Sensoren, maschinellem Lernen und fortschrittlichen Algorithmen erm{\"o}glicht eine pr{\"a}zise Analyse von Fußg{\"a}ngerverhalten und Umgebungsfaktoren. Dabei spielt die Echtzeitverarbeitung eine entscheidende Rolle, um schnell auf sich {\"a}ndernde Situationen zu reagieren. Zus{\"a}tzlich zur Technologieentwicklung betont diese Analyse die Notwendigkeit strikter Sicherheitsmaßnahmen, um potenzielle Risiken und Sicherheitsl{\"u}cken zu minimieren. Dazu geh{\"o}ren Sicherheitsprotokolle f{\"u}r die Datenspeicherung, den Modellschutz und den Zu-griff auf KI-Systeme. Die Einhaltung gesetzlicher und ethischer Richtlinien ist ein weiterer wichtiger Aspekt. Regulatorische Vorgaben und ethische Standards sollen sicherstellen, dass KI-Technologien im Automobilsektor nicht nur sicher, sondern auch im Einklang mit gesellschaftlichen Werten und Normen eingesetzt werden.}, language = {de} } @article{Seeliger2023, author = {Seeliger, Frank}, title = {Kann die Spur von Bibliotheken nicht in {\"A}onen untergehen?}, series = {Bibliothek : Forschung und Praxis}, volume = {47}, journal = {Bibliothek : Forschung und Praxis}, number = {1}, publisher = {De Gruyter}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18900}, pages = {100 -- 105}, year = {2023}, abstract = {Der Beitrag bezieht {\"u}ber zwei Narrative zu einer Vision Stellung, die hoffentlich in greifbarer N{\"a}he ist. Die Aussichten beziehen sich auf die Selbstorganisation und den neu zu gestaltenden Kreislauf des Wissens, wof{\"u}r sich Bibliotheken zust{\"a}ndig f{\"u}hlen.}, language = {de} } @article{BoehmeDoehlerHofmannetal.2023, author = {B{\"o}hme, Andrea and D{\"o}hler, Torsten and Hofmann, Mandy and Neumann, Jens and Bochem, Reinhard and Geißler, Ute and Foitzik, Andreas}, title = {Electrolytical Coating of Inhomogeneous Structures Distributed on Metallic Surfaces}, series = {Materials Science Forum}, volume = {1106}, journal = {Materials Science Forum}, publisher = {Trans Tech Publications}, issn = {0255-5476}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18825}, pages = {75 -- 80}, year = {2023}, abstract = {In modern electrochemical coating technology, it is common practice to create uniform layers. However, this study focuses on the deposition of non-uniform layers achieved through a deliberate arrangement of micro structured electrodes on the anode side. The "dog bone effect" was employed as the primary approach [1]. When electroplating on an otherwise uniform surface, this effect selectively processes an area influenced by the geometric edge effect (figure 1 left). The coating within this area is intended to be (i) unevenly distributed and (ii) non-reproducible. Process data was obtained through electrochemical simulations and subsequently applied to a specially designed micro-galvanic setup. This enabled the production of suitable micro structured anodes, validation of coating parameters, and the deposition of visually imperceptible structured areas with inhomogeneous properties using "adhesive gold" on appropriate substrates such as silver and nickel. The layers and their local topography were characterized and analyzed using confocal laser microscopy, X-Ray fluorescence analysis (XRF), as well as a self-designed and constructed laser interference device. As a result, this specific galvanic process technology successfully produced metallic layers that (i) cannot be visually confirmed by the naked eye, (ii) exhibit varied microstructural anode geometries, (iii) display unique differences in layer thickness, (iv) possess non-reproducible and chaotic topographies, and (v) can be detected and identified using conventional analysis techniques or a simple interference setup.}, language = {en} } @inproceedings{AlekseevaReshetnikFrohmeetal.2023, author = {Alekseeva, Victoriia and Reshetnik, Viktor and Frohme, Marcus and Kachailo, Irina and Murizyna, Irina and Nechyporenko, Alina}, title = {Investigation of the Impact of Insulin Resistance on the Bone Density of the Upper Wall of the Maxillary Sinus}, series = {Proceedings of the 3rd International Workshop of IT-professionals on Artificial Intelligence, ProfIT AI 2023, Waterloo, Canada, November 20-22, 2023}, volume = {3641}, booktitle = {Proceedings of the 3rd International Workshop of IT-professionals on Artificial Intelligence, ProfIT AI 2023, Waterloo, Canada, November 20-22, 2023}, editor = {Chumachenko, Dmytro and Kaur, Jasleen and Yakovlev, Sergiy and Morita, Plinio P.}, publisher = {CEUR-WS.org}, url = {http://nbn-resolving.de/urn:nbn:de:0074-3641-3}, pages = {216 -- 223}, year = {2023}, abstract = {The aim of our study was to investigate the impact of insulin resistance on the bone density of the upper wall of the maxillary sinus. Materials and Methods: The study included 100 female participants aged 18 to 44 years, divided into two groups. The first group consisted of individuals with insulin resistance, while the control group comprised individuals without signs of insulin resistance. In each group, we conducted an investigation of the radiological density of the upper wall of the maxillary sinus using uncertainty calculations. Results of the study suggest a potential influence of insulin resistance on the density of bone tissue around the nasal sinuses, specifically the upper wall of the maxillary sinus in our case. This parameter was found to be minimal in the group of individuals with insulin resistance. It is particularly noteworthy that both minimum and maximum bone density decreased in this group. Conclusions. The research focused on how insulin resistance affects the density of the upper wall of the maxillary sinus. By employing uncertainty calculations, the study revealed that insulin resistance is associated with a decrease in the minimum density of the upper wall of the maxillary sinus. This tendency may act as a catalyst for the emergence of significant inflammatory alterations in the nasal sinuses, serving as a foundation for the initiation of complications.}, language = {en} } @inproceedings{WelzelHauschultzKrumnowetal.2023, author = {Welzel, Felix and Hauschultz, Mike Thomas and Krumnow, Erik and Foitzik, Andreas and Richetta, Maria}, title = {Concept and simulation of micromixers and aliquoting for PCR systems}, series = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, booktitle = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, editor = {Stolzenburg, Frieder and Reinboth, Christian and Lohr, Thomas and Vogel, Kathleen}, publisher = {Hochschule Harz}, address = {Wernigerode}, issn = {2627-5708}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18611}, pages = {303 -- 306}, year = {2023}, abstract = {In this paper, different concepts for mixing sample and master mix by means of simulation are discussed. The main focus was on mixers with a low dead volume, because of their relevance to PCR. In addition, a concept for aliquoting the mixed solution was elaborated and simulated. The simulation showed very good mixing with serpentineand tesla-mixers at flow rates of 1-16 µL/s. Furthermore, a uniform distribution with aliquoting could be achieved, while a slight dependence between flow rate and pressure was observed. In the further course, these concepts are to be combined and tested on a microfluidic chip. This can then be integrated into the workflow of existing PCR protocols.}, language = {en} } @inproceedings{FriedoHauschultzDoehleretal.2023, author = {Friedo, Maria Helene and Hauschultz, Mike Thomas and D{\"o}hler, Torsten and B{\"o}hme, Andrea and Richetta, Maria and Foitzik, Andreas}, title = {Sustainable production of injection moulds through additive manufacturing and improved application of energy management}, series = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, booktitle = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, editor = {Stolzenburg, Frieder and Reinboth, Christian and Lohr, Thomas and Vogel, Kathleen}, publisher = {Hochschule Harz}, address = {Wernigerode}, issn = {2627-5708}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18600}, pages = {298 -- 302}, year = {2023}, abstract = {The concept of this thesis is to optimize the manufacturing process of injection moulding tools by using additive manufacturing and thus contribute to environmental protection. For this purpose, the individual steps of the traditional manufacturing process are identified and analysed to determine which steps can be replaced by additive manufacturing. The first step is to clarify which mould components can benefit from additive manufacturing. In particular, the capabilities and limitations of additive manufacturing technologies must be considered. Furthermore, another focus is on how to optimize the cooling and temperature control of the tools. Potential savings through the use of lightweight or insulating surfaces will be examined. In addition to the technical feasibility, the cost-effectiveness of the concept will also be considered. Finally, the contribution of the concept to the reduction of the environmental impact will be evaluated. In particular, energy savings and the reduction of CO2 emissions are taken into account. The potential to optimize the injection mould manufacturing process and reduce environmental impact is significant. Using additive manufacturing can be an economic and environmental advantage.}, language = {en} } @inproceedings{HeinrichStollfussJacobsetal.2023, author = {Heinrich, Moritz and Stollfuss, Carsten and Jacobs, Hannes and Di Vona, Maria Luisa and Pizzoferrato, Roberto and Foitzik, Andreas}, title = {A conductivity-based, batch-optimized system for analyzing the total of carbon parameter in water}, series = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, booktitle = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, editor = {Stolzenburg, Frieder and Reinboth, Christian and Lohr, Thomas and Vogel, Kathleen}, publisher = {Hochschule Harz}, address = {Wernigerode}, issn = {2627-5708}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18598}, pages = {15 -- 20}, year = {2023}, abstract = {In cooperation with the company Purification Membranes Analytics GmbH (PMA), a prototype has been developed that analyzes the total organic carbon (TOC) content of water samples based on a complex conductivity measurement. In the process, a batchoptimized system was developed that delivers qualitative results even in highly polluted waters. This method requires small sample volumes and was assembled using an ultrapure water system, a sample mixing system, various electronic control units and a miniTOC system that uses a UV light source to decompose organic carbons and outputs differential values using two conductivity sensors. During the project, a fully automated prototype was developed and is ready for use. In the future, this method could support common methods and lead to more accurate statements on water quality in a cost-effective manner.}, language = {en} } @inproceedings{HauschultzFriedoDoehleretal.2023, author = {Hauschultz, Mike Thomas and Friedo, Maria Helene and D{\"o}hler, Torsten and B{\"o}hme, Andrea and Richetta, Maria and Foitzik, Andreas}, title = {Additive Manufacturing of Electrodes: Innovative Applications and Opportunities}, series = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, booktitle = {NWK 2023 - Tagungsband zur 23. Nachwuchswissenschaftler*innenkonferenz}, editor = {Stolzenburg, Frieder and Reinboth, Christian and Lohr, Thomas and Vogel, Kathleen}, publisher = {Hochschule Harz}, address = {Wernigerode}, issn = {2627-5708}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18621}, pages = {292 -- 297}, year = {2023}, abstract = {Additive manufacturing, also known as 3D printing, has gained tremendous importance in recent years. One of the areas where additive manufacturing is particularly useful is in the fabrication of electrodes. Electrodes are an important component of a wide range of applications, including electrochemistry, biomedical engineering, energy storage, analytics, electronics as well as life sciences. Traditionally, electrodes have been manufactured through costly processes such as etching, electroplating or cutting and milling. Additive manufacturing offers a new way to fabricate electrodes by depositing materials layer by layer (Yap et al., 2015). This opens up new possibilities for designing electrodes with complex geometries and structures that would not be possible using conventional methods. As a result, 3D printed electrodes are gaining interest in fields such as electromobility, water disinfection, manufacturing, and life sciences, which will be presented in this paper.}, language = {en} }