@article{AlbannaConzenWeissetal.2021, author = {Albanna, Walid and Conzen, Catharina and Weiss, Miriam and Seyfried, Katharina and Kotliar, Konstantin and Schmidt, Tobias Philip and Kuerten, David and Hescheler, J{\"u}rgen and Bruecken, Anne and Schmidt-Trucks{\"a}ss, Arno and Neumaier, Felix and Wiesmann, Martin and Clusmann, Hans and Schubert, Gerrit Alexander}, title = {Non-invasive assessment of neurovascular coupling after aneurysmal subarachnoid hemorrhage: a prospective observational trial using retinal vessel analysis}, series = {Frontiers in Neurology}, volume = {12}, journal = {Frontiers in Neurology}, number = {12}, issn = {1664-2295}, doi = {10.3389/fneur.2021.690183}, pages = {1 -- 15}, year = {2021}, abstract = {Delayed cerebral ischemia (DCI) is a common complication after aneurysmal subarachnoid hemorrhage (aSAH) and can lead to infarction and poor clinical outcome. The underlying mechanisms are still incompletely understood, but animal models indicate that vasoactive metabolites and inflammatory cytokines produced within the subarachnoid space may progressively impair and partially invert neurovascular coupling (NVC) in the brain. Because cerebral and retinal microvasculature are governed by comparable regulatory mechanisms and may be connected by perivascular pathways, retinal vascular changes are increasingly recognized as a potential surrogate for altered NVC in the brain. Here, we used non-invasive retinal vessel analysis (RVA) to assess microvascular function in aSAH patients at different times after the ictus.}, language = {en} } @incollection{Kotliar2021, author = {Kotliar, Konstantin}, title = {Ocular rigidity: clinical approach}, series = {Ocular Rigidity, Biomechanics and Hydrodynamics of the Eye}, booktitle = {Ocular Rigidity, Biomechanics and Hydrodynamics of the Eye}, editor = {Pallikaris, I. and Tsilimbaris, M. K. and Dastiridou, A. I.}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-64422-2}, doi = {10.1007/978-3-030-64422-2_2}, pages = {15 -- 43}, year = {2021}, abstract = {The term ocular rigidity is widely used in clinical ophthalmology. Generally it is assumed as a resistance of the whole eyeball to mechanical deformation and relates to biomechanical properties of the eye and its tissues. Basic principles and formulas for clinical tonometry, tonography and pulsatile ocular blood flow measurements are based on the concept of ocular rigidity. There is evidence for altered ocular rigidity in aging, in several eye diseases and after eye surgery. Unfortunately, there is no consensual view on ocular rigidity: it used to make a quite different sense for different people but still the same name. Foremost there is no clear consent between biomechanical engineers and ophthalmologists on the concept. Moreover ocular rigidity is occasionally characterized using various parameters with their different physical dimensions. In contrast to engineering approach, clinical approach to ocular rigidity claims to characterize the total mechanical response of the eyeball to its deformation without any detailed considerations on eye morphology or material properties of its tissues. Further to the previous chapter this section aims to describe clinical approach to ocular rigidity from the perspective of an engineer in an attempt to straighten out this concept, to show its advantages, disadvantages and various applications.}, language = {en} } @article{NeumaierKotliarHaerenetal.2021, author = {Neumaier, Felix and Kotliar, Konstantin and Haeren, Roel Hubert Louis and Temel, Yasin and L{\"u}ke, Jan Niklas and Seyam, Osama and Lindauer, Ute and Clusmann, Hans and Hescheler, J{\"u}rgen and Schubert, Gerrit Alexander and Schneider, Toni and Albanna, Walid}, title = {Retinal Vessel Responses to Flicker Stimulation Are Impaired in Ca v 2.3-Deficient Mice—An in- vivo Evaluation Using Retinal Vessel Analysis (RVA)}, series = {Frontiers in Neurology}, volume = {12}, journal = {Frontiers in Neurology}, publisher = {Frontiers}, doi = {10.3389/fneur.2021.659890}, pages = {1 -- 11}, year = {2021}, language = {en} } @article{FiedlerOrzadaFloeseretal.2021, author = {Fiedler, Thomas M. and Orzada, Stephan and Fl{\"o}ser, Martina and Rietsch, Stefan H. G. and Quick, Harald H. and Ladd, Mark E. and Bitz, Andreas}, title = {Performance analysis of integrated RF microstrip transmit antenna arrays with high channel count for body imaging at 7 T}, series = {NMR in Biomedicine}, volume = {34}, journal = {NMR in Biomedicine}, number = {7}, publisher = {Wiley}, address = {Weinheim}, issn = {0952-3480 (ISSN)}, doi = {10.1002/nbm.4515}, pages = {18 SeitenWiley}, year = {2021}, abstract = {The aim of the current study was to investigate the performance of integrated RF transmit arrays with high channel count consisting of meander microstrip antennas for body imaging at 7 T and to optimize the position and number of transmit ele- ments. RF simulations using multiring antenna arrays placed behind the bore liner were performed for realistic exposure conditions for body imaging. Simulations were performed for arrays with as few as eight elements and for arrays with high channel counts of up to 48 elements. The B1+ field was evaluated regarding the degrees of freedom for RF shimming in the abdomen. Worst-case specific absorption rate (SARwc ), SAR overestimation in the matrix compression, the number of virtual obser- vation points (VOPs) and SAR efficiency were evaluated. Constrained RF shimming was performed in differently oriented regions of interest in the body, and the devia- tion from a target B1+ field was evaluated. Results show that integrated multiring arrays are able to generate homogeneous B1+ field distributions for large FOVs, espe- cially for coronal/sagittal slices, and thus enable body imaging at 7 T with a clinical workflow; however, a low duty cycle or a high SAR is required to achieve homoge- neous B1+ distributions and to exploit the full potential. In conclusion, integrated arrays allow for high element counts that have high degrees of freedom for the pulse optimization but also produce high SARwc , which reduces the SAR accuracy in the VOP compression for low-SAR protocols, leading to a potential reduction in array performance. Smaller SAR overestimations can increase SAR accuracy, but lead to a high number of VOPs, which increases the computational cost for VOP evaluation and makes online SAR monitoring or pulse optimization challenging. Arrays with interleaved rings showed the best results in the study.}, language = {en} } @article{TemizArtmannKurulgandemirciFıratetal.2021, author = {Temiz Artmann, Ayseg{\"u}l and Kurulgan demirci, Eylem and F{\i}rat, Ipek Seda and Oflaz, Hakan and Artmann, Gerhard}, title = {Recombinant activated protein C (rhAPC) affects lipopolysaccharide-induced mechanical compliance changes and beat frequency of mESC-derived cardiomyocyte monolayers}, series = {SHOCK}, journal = {SHOCK}, publisher = {Wolters Kluwer}, address = {K{\"o}ln}, issn = {1540-0514}, doi = {10.1097/SHK.0000000000001845}, year = {2021}, 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} } @article{DickhoffHorikawaFunke2021, author = {Dickhoff, Jens and Horikawa, Atsushi and Funke, Harald}, title = {Hydrogen Combustion - new DLE Combustor Addresses NOx Emissions and Flashback}, series = {Turbomachinery international : the global journal of energy equipment}, volume = {62}, journal = {Turbomachinery international : the global journal of energy equipment}, number = {4}, publisher = {MJH Life Sciences}, address = {Cranbury}, issn = {2767-2328}, pages = {26 -- 27}, year = {2021}, language = {en} } @incollection{ButenwegGellertMeyer2021, author = {Butenweg, Christoph and Gellert, Christoph and Meyer, Udo}, title = {Erdbebenbemessung bei Mauerwerksbauten}, series = {Mauerwerk Kalender 2021: Kunststoffverankerungen Digitalisierung im Mauerwerksbau}, booktitle = {Mauerwerk Kalender 2021: Kunststoffverankerungen Digitalisierung im Mauerwerksbau}, publisher = {Ernst \& Sohn}, address = {Berlin}, isbn = {9783433032930}, doi = {10.1002/9783433610732.ch12}, pages = {329 -- 355}, year = {2021}, abstract = {Der vorliegende Beitrag stellt den seismischen Nachweis von Mauerwerksbauten in Deutschland auf Grundlage der DIN EN 1998-1/NA vor, wobei auch die wesentlichen {\"A}nderungen zu der Norm DIN 4149 vergleichend erl{\"a}utert werden. Vorgestellt werden die Definition der Erdbebeneinwirkung, das seismische Verhalten von Mauerwerksbauten und die Erl{\"a}uterung der Rechenverfahren. Darauf aufbauend wird die Anwendung an drei Praxisbeispielen demonstriert.}, language = {de} } @incollection{DiekmannEggert2021, author = {Diekmann, Julian and Eggert, Mathias}, title = {Is a Progressive Web App an Alternative for Native App Development?}, series = {3. Wissenschaftsforum: Digitale Transformation (WiFo21) (Lecture Notes in Informatics ; P-319)}, booktitle = {3. Wissenschaftsforum: Digitale Transformation (WiFo21) (Lecture Notes in Informatics ; P-319)}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Darmstadt}, isbn = {978-3-88579-713-5}, pages = {35 -- 48}, year = {2021}, abstract = {The existence of several mobile operating systems, such as Android and iOS, is a challenge for developers because the individual platforms are not compatible with each other and require separate app developments. For this reason, cross-platform approaches have become popular but lack in cloning the native behavior of the different operating systems. Out of the plenty cross-platform approaches, the progressive web app (PWA) approach is perceived as promising but needs further investigation. Therefore, the paper at hand aims at investigating whether PWAs are a suitable alternative for native apps by developing a PWA clone of an existing app. Two surveys are conducted in which potential users test and evaluate the PWA prototype with regard to its usability. The survey results indicate that PWAs have great potential, but cannot be treated as a general alternative to native apps. For guiding developers when and how to use PWAs, four design guidelines for the development of PWA-based apps are derived based on the results.}, language = {en} } @article{ButenwegKubalskiElDeibetal.2021, author = {Butenweg, Christoph and Kubalski, Thomas and El-Deib, Khaled and Gellert, Christoph}, title = {Erdbebennachweis von Mauerwerksbauten nach DIN EN 1998-1/NA-2021}, series = {Bautechnik : Zeitschrift f{\"u}r den gesamten Ingenieurbau}, volume = {98}, journal = {Bautechnik : Zeitschrift f{\"u}r den gesamten Ingenieurbau}, number = {11}, editor = {Jesse, Dirk}, publisher = {Ernst \& Sohn}, address = {Berlin}, issn = {1437-0999}, doi = {10.1002/bate.202100064}, pages = {852 -- 863}, year = {2021}, abstract = {Mauerwerksbauten in Deutschland sind mit Einf{\"u}hrung des nationalen Anwendungsdokuments DIN EN 1998-1/NA auf Grundlage einer neuen probabilistischen Erdbebenkarte nachzuweisen. F{\"u}r erfolgreiche Erdbebennachweise {\"u}blicher Grundrissformen von Mauerwerksbauten stehen in dem zuk{\"u}nftigen Anwendungsdokument neue rechnerische Nachweism{\"o}glichkeiten zur Verf{\"u}gung, mit denen die Tragf{\"a}higkeitsreserven von Mauerwerksbauten in der Baupraxis mit einem {\"u}berschaubaren Aufwand besser in Ansatz gebracht werden k{\"o}nnen. Das Standardrechenverfahren ist weiterhin der kraftbasierte Nachweis, der nun mit h{\"o}heren Verhaltensbeiwerten im Vergleich zur DIN 4149 durchgef{\"u}hrt werden kann. Die h{\"o}heren Verhaltensbeiwerte basieren auf der besseren Ausnutzung der geb{\"a}udespezifischen Verformungsf{\"a}higkeit und Energiedissipation sowie der Lastumverteilung der Schubkr{\"a}fte im Grundriss mit Ansatz von Rahmentragwirkung durch Wand-Deckeninteraktionen. Alternativ dazu kann ein nichtlinearer Nachweis auf Grundlage von Pushover-Analysen zur Anwendung kommen. Vervollst{\"a}ndigt werden die Regelungen f{\"u}r Mauerwerksbauten durch neue Regelungen f{\"u}r nichttragende Innenw{\"a}nde und Außenmauerschalen. Der vorliegende Beitrag stellt die Grundlagen und Hintergr{\"u}nde der neuen rechnerischen Nachweise in DIN EN 1998-1/NA vor und demonstriert deren Anwendung an einem Beispiel aus der Praxis.}, language = {de} } @article{OertelBung2021, author = {Oertel, Mario and Bung, Daniel Bernhard}, title = {Hochwasserschutz - eine Aufgabe f{\"u}r eine nachhaltige Wasserwirtschaft}, series = {Wasserwirtschaft}, volume = {111}, journal = {Wasserwirtschaft}, number = {9-10}, publisher = {Springer Vieweg}, address = {Wiesbaden}, issn = {0043-0978}, pages = {3 -- 19}, year = {2021}, language = {de} } @inproceedings{Butenweg2021, author = {Butenweg, Christoph}, title = {Integrated approach for monitoring and management of buildings with digital building models and modern sensor technologies}, series = {Proceedings of the International Conference Civil Engineering 2021 - Achievements and Visions}, booktitle = {Proceedings of the International Conference Civil Engineering 2021 - Achievements and Visions}, editor = {Kuzmanović, Vladan and Ignjatović, Ivan}, publisher = {University of Belgrade}, address = {Belgrade}, pages = {67 -- 75}, year = {2021}, abstract = {Nowadays modern high-performance buildings and facilities are equipped with monitoring systems and sensors to control building characteristics like energy consumption, temperature pattern and structural safety. The visualization and interpretation of sensor data is typically based on simple spreadsheets and non-standardized user-oriented solutions, which makes it difficult for building owners, facility managers and decision-makers to evaluate and understand the data. The solution of this problem in the future are integrated BIM-Sensor approaches which allow the generation of BIM models incorporating all relevant information of monitoring systems. These approaches support both the dynamic visualization of key structural performance parameters, the effective long-term management of sensor data based on BIM and provide a user-friendly interface to communicate with various stakeholders. A major benefit for the end user is the use of the BIM software architecture, which is the future standard anyway. In the following, the application of the integrated BIM-Sensor approach is illustrated for a typical industrial facility as a part of an early warning and rapid response system for earthquake events currently developed in the research project "ROBUST" with financial support by the German Federal Ministry for Economic Affairs and Energy (BMWI).}, language = {en} } @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} } @article{ValeroSchalkoFriedrichetal.2021, author = {Valero, Daniel and Schalko, Isabella and Friedrich, Heide and Abad, Jorge D. and Bung, Daniel Bernhard and Donchyts, Gennadii and Felder, Stefan and Ferreira, Rui M. L. and Hohermuth, Benjamin and Kramer, Matthias and Li, Danxun and Mendes, Luis and Moreno-Rodenas, Antonio and Nones, Michael and Paron, Paolo and Ruiz-Villanueva, Virginia and Wang, Ruo-Qian and Franca, Mario J.}, title = {Pathways towards democratization of hydro-environment observations and data}, series = {Iahr White Paper Series}, journal = {Iahr White Paper Series}, number = {1}, publisher = {International Association for Hydro-Environment Engineering and Research (IAHR)}, pages = {1 -- 9}, year = {2021}, language = {en} } @inproceedings{DeyElsenFerreinetal.2021, author = {Dey, Thomas and Elsen, Ingo and Ferrein, Alexander and Frauenrath, Tobias and Reke, Michael and Schiffer, Stefan}, title = {CO2 Meter: a do-it-yourself carbon dioxide measuring device for the classroom}, series = {PETRA '21: Proceedings of the 14th Pervasive Technologies Related to Assistive Environments Conference}, booktitle = {PETRA '21: Proceedings of the 14th Pervasive Technologies Related to Assistive Environments Conference}, editor = {Makedon, Fillia}, publisher = {Association for Computing Machinery}, address = {New York}, isbn = {9781450387927}, doi = {10.1145/3453892.3462697}, pages = {292 -- 299}, year = {2021}, abstract = {In this paper we report on CO2 Meter, a do-it-yourself carbon dioxide measuring device for the classroom. Part of the current measures for dealing with the SARS-CoV-2 pandemic is proper ventilation in indoor settings. This is especially important in schools with students coming back to the classroom even with high incidents rates. Static ventilation patterns do not consider the individual situation for a particular class. Influencing factors like the type of activity, the physical structure or the room occupancy are not incorporated. Also, existing devices are rather expensive and often provide only limited information and only locally without any networking. This leaves the potential of analysing the situation across different settings untapped. Carbon dioxide level can be used as an indicator of air quality, in general, and of aerosol load in particular. Since, according to the latest findings, SARS-CoV-2 can be transmitted primarily in the form of aerosols, carbon dioxide may be used as a proxy for the risk of a virus infection. Hence, schools could improve the indoor air quality and potentially reduce the infection risk if they actually had measuring devices available in the classroom. Our device supports schools in ventilation and it allows for collecting data over the Internet to enable a detailed data analysis and model generation. First deployments in schools at different levels were received very positively. A pilot installation with a larger data collection and analysis is underway.}, language = {en} } @article{GermanMikuckiWelchetal.2021, author = {German, Laura and Mikucki, Jill A. and Welch, Susan A. and Welch, Kathleen A. and Lutton, Anthony and Dachwald, Bernd and Kowalski, Julia and Heinen, Dirk and Feldmann, Marco and Francke, Gero and Espe, Clemens and Lyons, W. Berry}, title = {Validation of sampling antarctic subglacial hypersaline waters with an electrothermal ice melting probe (IceMole) for environmental analytical geochemistry}, series = {International Journal of Environmental Analytical Chemistry}, volume = {101}, journal = {International Journal of Environmental Analytical Chemistry}, number = {15}, publisher = {Taylor \& Francis}, address = {London}, issn = {0306-7319}, doi = {10.1080/03067319.2019.1704750}, pages = {2654 -- 2667}, year = {2021}, abstract = {Geochemical characterisation of hypersaline waters is difficult as high concentrations of salts hinder the analysis of constituents at low concentrations, such as trace metals, and the collection of samples for trace metal analysis in natural waters can be easily contaminated. This is particularly the case if samples are collected by non-conventional techniques such as those required for aquatic subglacial environments. In this paper we present the first analysis of a subglacial brine from Taylor Valley, (~ 78°S), Antarctica for the trace metals: Ba, Co, Mo, Rb, Sr, V, and U. Samples were collected englacially using an electrothermal melting probe called the IceMole. This probe uses differential heating of a copper head as well as the probe's sidewalls and an ice screw at the melting head to move through glacier ice. Detailed blanks, meltwater, and subglacial brine samples were collected to evaluate the impact of the IceMole and the borehole pump, the melting and collection process, filtration, and storage on the geochemistry of the samples collected by this device. Comparisons between melt water profiles through the glacier ice and blank analysis, with published studies on ice geochemistry, suggest the potential for minor contributions of some species Rb, As, Co, Mn, Ni, NH4+, and NO2-+NO3- from the IceMole. The ability to conduct detailed chemical analyses of subglacial fluids collected with melting probes is critical for the future exploration of the hundreds of deep subglacial lakes in Antarctica.}, language = {en} } @inproceedings{ChajanSchulteTiggesRekeetal.2021, author = {Chajan, Eduard and Schulte-Tigges, Joschua and Reke, Michael and Ferrein, Alexander and Matheis, Dominik and Walter, Thomas}, title = {GPU based model-predictive path control for self-driving vehicles}, series = {IEEE Intelligent Vehicles Symposium (IV)}, booktitle = {IEEE Intelligent Vehicles Symposium (IV)}, publisher = {IEEE}, address = {New York, NY}, isbn = {978-1-7281-5394-0}, doi = {10.1109/IV48863.2021.9575619}, pages = {1243 -- 1248}, year = {2021}, abstract = {One central challenge for self-driving cars is a proper path-planning. Once a trajectory has been found, the next challenge is to accurately and safely follow the precalculated path. The model-predictive controller (MPC) is a common approach for the lateral control of autonomous vehicles. The MPC uses a vehicle dynamics model to predict the future states of the vehicle for a given prediction horizon. However, in order to achieve real-time path control, the computational load is usually large, which leads to short prediction horizons. To deal with the computational load, the control algorithm can be parallelized on the graphics processing unit (GPU). In contrast to the widely used stochastic methods, in this paper we propose a deterministic approach based on grid search. Our approach focuses on systematically discovering the search area with different levels of granularity. To achieve this, we split the optimization algorithm into multiple iterations. The best sequence of each iteration is then used as an initial solution to the next iteration. The granularity increases, resulting in smooth and predictable steering angle sequences. We present a novel GPU-based algorithm and show its accuracy and realtime abilities with a number of real-world experiments.}, language = {en} } @article{KoehlerRoepkeWolf2021, author = {K{\"o}hler, Klemens and R{\"o}pke, Ren{\´e} and Wolf, Martin R.}, title = {Through a mirror darkly - On the obscurity of teaching goals in game-based learning in IT security}, series = {ISAGA 2019: Simulation Gaming Through Times and Disciplines}, journal = {ISAGA 2019: Simulation Gaming Through Times and Disciplines}, publisher = {Springer}, address = {Cham}, doi = {10.1007/978-3-030-72132-9_6}, pages = {61 -- 73}, year = {2021}, abstract = {Teachers and instructors use very specific language communicating teaching goals. The most widely used frameworks of common reference are the Bloom's Taxonomy and the Revised Bloom's Taxonomy. The latter provides distinction of 209 different teaching goals which are connected to methods. In Competence Developing Games (CDGs - serious games to convey knowledge) and in IT security education, a two- or three level typology exists, reducing possible learning outcomes to awareness, training, and education. This study explores whether this much simpler framework succeeds in achieving the same range of learning outcomes. Method wise a keyword analysis was conducted. The results were threefold: 1. The words used to describe teaching goals in CDGs on IT security education do not reflect the whole range of learning outcomes. 2. The word choice is nevertheless different from common language, indicating an intentional use of language. 3. IT security CDGs use different sets of terms to describe learning outcomes, depending on whether they are awareness, training, or education games. The interpretation of the findings is that the reduction to just three types of CDGs reduces the capacity to communicate and think about learning outcomes and consequently reduces the outcomes that are intentionally achieved.}, language = {en} } @article{ElDeibButenwegKlinkel2021, author = {El-Deib, Khaled and Butenweg, Christoph and Klinkel, Sven}, title = {Erdbebennachweis von Mauerwerksbauten mit realistischen Modellen und erh{\"o}hten Verhaltensbeiwerten}, series = {Mauerwerk}, volume = {2021}, journal = {Mauerwerk}, number = {3}, editor = {Jesse, Dirk}, publisher = {Wiley}, address = {Weinheim}, issn = {1437-1022}, doi = {10.1002/dama.202110014}, pages = {110 -- 119}, year = {2021}, abstract = {Die Anwendung des linearen Nachweiskonzepts auf Mauerwerksbauten f{\"u}hrt dazu, dass bereits heute Standsicherheitsnachweise f{\"u}r Geb{\"a}ude mit {\"u}blichen Grundrissen in Gebieten mit moderaten Erdbebeneinwirkungen nicht mehr gef{\"u}hrt werden k{\"o}nnen. Diese Problematik wird sich in Deutschland mit der Einf{\"u}hrung kontinuierlicher probabilistischer Erdbebenkarten weiter versch{\"a}rfen. Aufgrund der Erh{\"o}hung der seismischen Einwirkungen, die sich vielerorts ergibt, ist es erforderlich, die vorhandenen, bislang nicht ber{\"u}cksichtigten Tragf{\"a}higkeitsreserven in nachvollziehbaren Nachweiskonzepten in der Baupraxis verf{\"u}gbar zu machen. Der vorliegende Beitrag stellt ein Konzept f{\"u}r die geb{\"a}udespezifische Ermittlung von erh{\"o}hten Verhaltensbeiwerten vor. Die Verhaltensbeiwerte setzen sich aus drei Anteilen zusammen, mit denen die Lastumverteilung im Grundriss, die Verformungsf{\"a}higkeit und Energiedissipation sowie die {\"U}berfestigkeiten ber{\"u}cksichtigt werden. F{\"u}r die rechnerische Ermittlung dieser drei Anteile wird ein nichtlineares Nachweiskonzept auf Grundlage von Pushover-Analysen vorgeschlagen, in denen die Interaktionen von W{\"a}nden und Geschossdecken durch einen Einspanngrad beschrieben werden. F{\"u}r die Bestimmung der Einspanngrade wird ein nichtlinearer Modellierungsansatz eingef{\"u}hrt, mit dem die Interaktion von W{\"a}nden und Decken abgebildet werden kann. Die Anwendung des Konzepts mit erh{\"o}hten geb{\"a}udespezifischen Verhaltensbeiwerten wird am Beispiel eines Mehrfamilienhauses aus Kalksandsteinen demonstriert. Die Ergebnisse der linearen Nachweise mit erh{\"o}hten Verhaltensbeiwerten f{\"u}r dieses Geb{\"a}ude liegen deutlich n{\"a}her an den Ergebnissen nichtlinearer Nachweise und somit bleiben {\"u}bliche Grundrisse in Erdbebengebieten mit den traditionellen linearen Rechenans{\"a}tzen nachweisbar.}, language = {de} } @inproceedings{FerreinMeessenLimpertetal.2021, author = {Ferrein, Alexander and Meeßen, Marcus and Limpert, Nicolas and Schiffer, Stefan}, title = {Compiling ROS schooling curricula via contentual taxonomies}, series = {Robotics in Education}, booktitle = {Robotics in Education}, editor = {Lepuschitz, Wilfried}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-67411-3}, doi = {10.1007/978-3-030-67411-3_5}, pages = {49 -- 60}, year = {2021}, abstract = {The Robot Operating System (ROS) is the current de-facto standard in robot middlewares. The steadily increasing size of the user base results in a greater demand for training as well. User groups range from students in academia to industry professionals with a broad spectrum of developers in between. To deliver high quality training and education to any of these audiences, educators need to tailor individual curricula for any such training. In this paper, we present an approach to ease compiling curricula for ROS trainings based on a taxonomy of the teaching contents. The instructor can select a set of dedicated learning units and the system will automatically compile the teaching material based on the dependencies of the units selected and a set of parameters for a particular training. We walk through an example training to illustrate our work.}, language = {en} } @misc{JungMuellerStaat2021, author = {Jung, Alexander and M{\"u}ller, Wolfram and Staat, Manfred}, title = {Corrigendum to "Wind and fairness in ski jumping: A computer modelling analysis" [J. Biomech. 75 (2018) 147-153]}, series = {Journal of Biomechanics}, volume = {128}, journal = {Journal of Biomechanics}, number = {Article number: 110690}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0021-9290}, doi = {10.1016/j.jbiomech.2021.110690}, pages = {1 Seite}, year = {2021}, language = {en} } @article{KaschSchmidtJahnetal.2021, author = {Kasch, Susanne and Schmidt, Thomas and Jahn, Simon and Eichler, Fabian and Thurn, Laura and Bremen, Sebastian}, title = {L{\"o}sungsans{\"a}tze und Verfahrenskonzepte zum Laserstrahlschmelzen von Glas}, series = {Schweissen und Schneiden}, volume = {73}, journal = {Schweissen und Schneiden}, number = {Heft 1-2}, publisher = {DVS Verlag}, address = {D{\"u}sseldorf}, isbn = {0036-7184}, pages = {32 -- 39}, year = {2021}, language = {de} } @article{PoghossianSchoening2021, author = {Poghossian, Arshak and Sch{\"o}ning, Michael Josef}, title = {Recent progress in silicon-based biologically sensitive field-effect devices}, series = {Current Opinion in Electrochemistry}, journal = {Current Opinion in Electrochemistry}, number = {Article number: 100811}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2451-9103}, doi = {10.1016/j.coelec.2021.100811}, year = {2021}, abstract = {Biologically sensitive field-effect devices (BioFEDs) advantageously combine the electronic field-effect functionality with the (bio)chemical receptor's recognition ability for (bio)chemical sensing. In this review, basic and widely applied device concepts of silicon-based BioFEDs (ion-sensitive field-effect transistor, silicon nanowire transistor, electrolyte-insulator-semiconductor capacitor, light-addressable potentiometric sensor) are presented and recent progress (from 2019 to early 2021) is discussed. One of the main advantages of BioFEDs is the label-free sensing principle enabling to detect a large variety of biomolecules and bioparticles by their intrinsic charge. The review encompasses applications of BioFEDs for the label-free electrical detection of clinically relevant protein biomarkers, deoxyribonucleic acid molecules and viruses, enzyme-substrate reactions as well as recording of the cell acidification rate (as an indicator of cellular metabolism) and the extracellular potential.}, language = {en} } @incollection{HoffschmidtAlexopoulosRauetal.2021, author = {Hoffschmidt, Bernhard and Alexopoulos, Spiros and Rau, Christoph and Sattler, Johannes Christoph and Anthrakidis, Anette and Teixeira Boura, Cristiano Jos{\´e} and O'Connor, B. and Chico Caminos, Ricardo Alexander and Rend{\´o}n, C. and Hilger, P.}, title = {Concentrating Solar Power}, series = {Earth systems and environmental sciences}, booktitle = {Earth systems and environmental sciences}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {978-0-12-409548-9}, doi = {10.1016/B978-0-12-819727-1.00089-3}, year = {2021}, abstract = {The focus of this chapter is the production of power and the use of the heat produced from concentrated solar thermal power (CSP) systems. The chapter starts with the general theoretical principles of concentrating systems including the description of the concentration ratio, the energy and mass balance. The power conversion systems is the main part where solar-only operation and the increase in operational hours. Solar-only operation include the use of steam turbines, gas turbines, organic Rankine cycles and solar dishes. The operational hours can be increased with hybridization and with storage. Another important topic is the cogeneration where solar cooling, desalination and of heat usage is described. Many examples of commercial CSP power plants as well as research facilities from the past as well as current installed and in operation are described in detail. The chapter closes with economic and environmental aspects and with the future potential of the development of CSP around the world.}, language = {en} } @inproceedings{SchulteEggert2021, author = {Schulte, Maximilian and Eggert, Mathias}, title = {Predicting hourly bitcoin prices based on long short-term memory neural networks}, series = {Proceedings of the International Conference on Wirtschaftsinformatik (WI) 2021}, booktitle = {Proceedings of the International Conference on Wirtschaftsinformatik (WI) 2021}, pages = {16 Seiten}, year = {2021}, abstract = {Bitcoin is a cryptocurrency and is considered a high-risk asset class whose price changes are difficult to predict. Current research focusses on daily price movements with a limited number of predictors. The paper at hand aims at identifying measurable indicators for Bitcoin price movements and the development of a suitable forecasting model for hourly changes. The paper provides three research contributions. First, a set of significant indicators for predicting the Bitcoin price is identified. Second, the results of a trained Long Short-term Memory (LSTM) neural network that predicts price changes on an hourly basis is presented and compared with other algorithms. Third, the results foster discussions of the applicability of neural nets for stock price predictions. In total, 47 input features for a period of over 10 months could be retrieved to train a neural net that predicts the Bitcoin price movements with an error rate of 3.52 \%.}, language = {en} } @masterthesis{Zaunbrecher2021, type = {Bachelor Thesis}, author = {Zaunbrecher, Fabienne}, title = {Living Spaces - By OASE: Konzeption eines Flagship-Stores mit Wohlf{\"u}hl- und Erlebnis-Spaces}, publisher = {FH Aachen}, address = {Aachen}, pages = {175 Seiten}, year = {2021}, abstract = {Konzeption eines Flagship-Stores mit Wohlf{\"u}hl- und Erlebnis-Spaces Die Bed{\"u}rfnisse von Besuchern und Kunden eines Gesch{\"a}fts haben sich {\"u}ber die letzten Jahre stark ver{\"a}ndert. Sie m{\"o}chten das ihr Kauf zum Erlebnis wird. Auf Basis dieser Erkenntnis wurde im Rahmen dieser Arbeit zusammen mit den Produkten des Weltmarktf{\"u}hrers f{\"u}r Teichtechnik und Aquaristik „OASE - Living Water" ein Storekonzept geschaffen. Dieses verbindet den Verkaufsraum mit unterschiedlichen Erlebniswelten, welche auf die jeweilig ausgestellte Produktkategorie abgestimmt sind. Zus{\"a}tzlich er{\"o}ffnet ein diverser und aufregend gestalteter Gartenbereich der zum Entspannen und Verweilen einl{\"a}dt. Der herausstechende Aspekt des Konzepts ist, dass die Produkte sowohl als reines Produkt, als auch in verbauter Version in Aktion zu sehen sind. Auf diese Art bietet die Marke „OASE - Living Water" ein neues Kauf-Erlebnis an.}, language = {de} } @masterthesis{Theisen2021, type = {Bachelor Thesis}, author = {Theisen, Paul}, title = {Die {\"a}sthetische Tonalit{\"a}t des Jazz : Immersion durch 3D-Visualisierung und musikalische Interaktion}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {111 Seiten}, year = {2021}, abstract = {Das Ausstellungskonzept »Free Jazz: A Collective Improvisation« widmet sich der {\"a}sthetischen Tonalit{\"a}t des gleichnamigen Albums von Ornette Coleman. Das besagte Album bildete den Grundstein f{\"u}r die Etablierung des Free Jazz - einer Musikform, die sich durch ihre schrille, hierarchiefreie Klangwelt sowie ein freies Improvisationsspiel auszeichnet und mit den g{\"a}ngigen Konventionen des Jazz bricht. Zu jedem der 8 Musiker, welche gemeinsam das von Coleman zusammengestellte Doppelquartett ergeben, wurden individuell abgestimmte, animierte und interaktive 3D-Gebilde konzipiert. Diese reagieren auf den Sound der jeweiligen Instrumente sowie die Position der Besuchenden und erm{\"o}glichen einen audiovisuellen, immersiven Zugang zum Album. Die Interaktion zwischen dem Publikum und den Gebilden schafft Raum f{\"u}r eine kollektive Improvisation auf sowohl der visuellen als auch auditiven Ebene.}, language = {de} } @article{BallVoegeleGrajewskietal.2021, author = {Ball, Christopher Stephen and V{\"o}gele, Stefan and Grajewski, Matthias and Kuckshinrichs, Wilhelm}, title = {E-mobility from a multi-actor point of view: Uncertainties and their impacts}, series = {Technological Forecasting and Social Change}, volume = {170}, journal = {Technological Forecasting and Social Change}, number = {Art. 120925}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {0040-1625}, doi = {10.1016/j.techfore.2021.120925}, year = {2021}, language = {en} } @article{JablonskiPoghossianSeverinetal.2021, author = {Jablonski, Melanie and Poghossian, Arshak and Severin, Robin and Keusgen, Michael and Wege, Christian and Sch{\"o}ning, Michael Josef}, title = {Capacitive Field-Effect Biosensor Studying Adsorption of Tobacco Mosaic Virus Particles}, series = {Micromachines}, volume = {12}, journal = {Micromachines}, number = {1}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/mi12010057}, pages = {Artikel 57}, year = {2021}, abstract = {Plant virus-like particles, and in particular, tobacco mosaic virus (TMV) particles, are increasingly being used in nano- and biotechnology as well as for biochemical sensing purposes as nanoscaffolds for the high-density immobilization of receptor molecules. The sensitive parameters of TMV-assisted biosensors depend, among others, on the density of adsorbed TMV particles on the sensor surface, which is affected by both the adsorption conditions and surface properties of the sensor. In this work, Ta₂O₅-gate field-effect capacitive sensors have been applied for the label-free electrical detection of TMV adsorption. The impact of the TMV concentration on both the sensor signal and the density of TMV particles adsorbed onto the Ta₂O₅-gate surface has been studied systematically by means of field-effect and scanning electron microscopy methods. In addition, the surface density of TMV particles loaded under different incubation times has been investigated. Finally, the field-effect sensor also demonstrates the label-free detection of penicillinase immobilization as model bioreceptor on TMV particles.}, language = {en} } @article{HarzheimMuehmelHeuermann2021, author = {Harzheim, Thomas and M{\"u}hmel, Marc and Heuermann, Holger}, title = {A SFCW harmonic radar system for maritime search and rescue using passive and active tags}, series = {International Journal of Microwave and Wireless Technologies}, volume = {13}, journal = {International Journal of Microwave and Wireless Technologies}, number = {Special Issue 7}, publisher = {Cambridge University Press}, address = {Cambridge}, doi = {10.1017/S1759078721000520}, pages = {691 -- 707}, year = {2021}, abstract = {This paper introduces a new maritime search and rescue system based on S-band illumination harmonic radar (HR). Passive and active tags have been developed and tested while attached to life jackets and a small boat. In this demonstration test carried out on the Baltic Sea, the system was able to detect and range the active tags up to a distance of 5800 m using an illumination signal transmit-power of 100 W. Special attention is given to the development, performance, and conceptual differences between passive and active tags used in the system. Guidelines for achieving a high HR dynamic range, including a system components description, are given and a comparison with other HR systems is performed. System integration with a commercial maritime X-band navigation radar is shown to demonstrate a solution for rapid search and rescue response and quick localization.}, language = {en} } @masterthesis{MeinersSchneider2021, type = {Bachelor Thesis}, author = {Meiners, Sonja and Schneider, Sophie}, title = {MULO - Multifunktionale Objekte: Eine Serie multifunktionaler Wohnobjekte}, publisher = {FH Aachen}, address = {Aachen}, pages = {137 Seiten}, year = {2021}, abstract = {Mit MULO wurde eine Serie multifunktionaler Objekte f{\"u}r den Wohnbereich entworfen. In Zeiten des {\"U}berangebots und des st{\"a}ndigen Wohnraumwechsels soll der Nutzer dieser Objekte mit einem modernen und schlichten Design unterst{\"u}tzt werden, das zu jedem Anlass passt. Die minimalistische {\"A}sthetik mit hohem Komfort orientiert sich dabei an den Bed{\"u}rfnissen des Endverbrauchers. Als Verwandlungsk{\"u}nstler bereichert MULO jeden Wohnraum. Die gesamte Serie ist unter der Ber{\"u}cksichtigung der schnelllebigen und sich wandelnden Welt entworfen worden. Mit multifunktionalen Objekten ist das Produkt den flexiblen Anforderungen und Bed{\"u}rfnissen des Menschen gewachsen. Die Bereiche Wohnen, Leben, Arbeiten, Schlafen und Entspannen werden durch das Sofa- , das Tisch- und das Keramik-System optimal abgedeckt. Durch die Verwendung von nachhaltigen und recycelbaren Materialien, setzt MULO ein kleines Statement und hinterl{\"a}sst nachhaltig Eindruck.}, language = {de} } @phdthesis{Jung2021, author = {Jung, Alexander}, title = {Electromechanical modelling and simulation of hiPSC-derived cardiac cell cultures}, publisher = {Universit{\"a}t Duisburg-Essen}, isbn = {978-3-9821811-1-0}, url = {http://nbn-resolving.de/https://nbn-resolving.org/urn:nbn:de:hbz:464-20210624-134942-7}, pages = {III, 135 Seiten}, year = {2021}, language = {en} } @techreport{StoelzleFeixThomasEngelstaedteretal.2021, author = {St{\"o}lzle-Feix, Sonja and Thomas, Ulrich and Engelst{\"a}dter, Max and Goßmann, Matthias and Linder, Peter and Staat, Manfred and Raman, Aravind Hariharan and Jung, Alexander and Fertig, Niels}, title = {Plattformtechnologie f{\"u}r kardiale Sicherheitspharmakologie basierend auf teilsynthetischem Herzmuskelgewebe (FLEXcyte) : gemeinsamer FuE-Abschlussbericht aller Partner des Verbundprojektes : Projektlaufzeit: 01.10.2018 bis 30.09.2020}, publisher = {Nanion Technologies GmbH}, address = {M{\"u}nchen}, doi = {10.2314/KXP:1813208581}, pages = {IV, 85 Seiten, 2 ungez{\"a}hlte Seiten}, year = {2021}, language = {de} } @article{Golland2021, author = {Golland, Alexander}, title = {Das Telekommunikation-Telemedien-Datenschutzgesetz. Cookies und PIMS als Herausforderungen f{\"u}r Website-Betreiber}, series = {NJW Neue Juristische Wochenschrift}, journal = {NJW Neue Juristische Wochenschrift}, number = {31}, editor = {Ewer, Wolfgang and Hamm, Rainer and Karpenstein, Ulrich and Oberth{\"u}r, Nathalie and Herchen, Hilke and Br{\"a}utigam, Peter}, publisher = {Beck}, address = {M{\"u}nchen}, issn = {0341-1915}, pages = {2238 -- 2243}, year = {2021}, language = {de} } @masterthesis{Schrey2021, type = {Bachelor Thesis}, author = {Schrey, Leander}, title = {Less Waste Shelf: Ein M{\"o}bel zur Reduzierung der h{\"a}uslich anfallenden Lebensmittelabf{\"a}lle}, publisher = {FH Aachen}, address = {Aachen}, pages = {177 Seiten}, year = {2021}, abstract = {Mit dem Projekt wird sich dem Problem der weltweiten Lebensmittelverschwendung angenommen und versucht Abf{\"a}lle in Privathaushalten prim{\"a}r industrialisierter Staaten zu reduzieren. Mit j{\"a}hrlich 1,3 Milliarden Tonnen landet circa ein Drittel aller weltweit produzierten Lebensmittel im M{\"u}ll. Einen Großteil dieser Abf{\"a}lle ist vermeidbar, besonders dort, wo man im {\"U}berfluss lebt. Das konzipierte M{\"o}belst{\"u}ck soll die Lagerungsm{\"o}glichkeiten des Nutzers optimieren und somit f{\"u}r die Wertsch{\"a}tzung von Lebensmitteln sensibilisieren. F{\"u}r das M{\"o}belst{\"u}ck werden ausschließlich nat{\"u}rliche Materialien verwendet, welche in ihrer Charakteristik optimal zum Funktionsumfang passen, der f{\"u}r die Lagerung ben{\"o}tigt wird. Das Material Terracotta erm{\"o}glicht es, mittels Verdunstungsk{\"u}hlung stromlos Gem{\"u}se kalt zu halten. Antibakterielles Holz t{\"o}tet sch{\"a}dliche Bakterien ab. Die Konstruktion erm{\"o}glicht somit eine fachgerechte Lebensmittelagerung und erm{\"o}glicht sowohl sehr flexible Nutzung, wie auch leichte Reparatur.}, language = {de} } @masterthesis{Tran2021, type = {Bachelor Thesis}, author = {Tran, Thuy Tien}, title = {Shaping the Future of E-Government: Design System zur Implementierung digitaler {\"o}ffentlicher Services}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {235 Seiten}, year = {2021}, abstract = {Der digitale Transformationsprozess ist einer der gr{\"o}ßten gesellschaftlichen Umbr{\"u}che in der Geschichte der Menschheit. Aufgrund der Corona-Pandemie stieg die Nutzung von digitalen Kan{\"a}len bei den B{\"u}rger:innen wie nie zuvor und f{\"u}hrt zu einem sprunghaften Anstieg der Nachfrage nach {\"o}ffentlichen Services in digitaler Form. Das Ziel dieser Bachelorarbeit ist es, einen digitalen Raum zu gestalten, der den analogen Weg zum Amt gr{\"o}ßtenteils erspart. Mit geeigneten Kommunikationskan{\"a}len kann auf die Bed{\"u}rfnisse unterschiedlicher Gruppen eingegangen werden. Die Entwicklung der Anwendung IDport bietet sowohl private als auch staatliche Einsparpotenziale. B{\"u}rokratische Aufw{\"a}nde sollen durch eine neue Art des E-Government beseitigt werden. Die Konzeption ist infolge der aktuellen Gegebenheit in Deutschland weit entfernt von einer realit{\"a}tsnahen Umsetzung, weshalb es sich bei der Anwendung um eine revolution{\"a}re Zukunftsvision handelt.}, language = {de} } @masterthesis{Niederschmidt2021, type = {Bachelor Thesis}, author = {Niederschmidt, S{\"o}ren}, title = {Living product: ein Ansatz, lebendige Organismen mit einem Produkt zu vereinen und nutzbar zu machen}, publisher = {FH Aachen}, address = {Aachen}, pages = {57 Seiten}, year = {2021}, abstract = {Diese Arbeit setzt sich mit der Frage auseinander, in welcher Form sich lebendige Organismen - hier insbesondere Pilze - in die Produktwelt integrieren lassen. In welcher Art und Weise beeinflusst ein Organismus das Produkterlebnis? Im Rahmen dieser Arbeit sind vier verschiedene Produkte entstanden, die die St{\"a}rken des Materials Myzelium demonstrieren. Myzelium bezeichnet das sehr dichte Wurzelnetzwerk eines Pilzes. Dieses lebendige Netzwerk kann dazu genutzt werden, um organische Stoffe miteinander zu verwachsen und somit Formen entstehen zu lassen. Die so entstandenen Produkte sind in eine Konzeptumgebung eingebettet, in der der Verbrauchende die Natur durch naturn{\"a}here Produkte (Form, Material und gewachsene Strukturen) neu erlebt. Gezeigt wird ein Packaging f{\"u}r Einmachgl{\"a}ser, ein Kressebeet, ein Wandregal und ein Teelicht.}, language = {de} } @masterthesis{Steinicke2021, type = {Bachelor Thesis}, author = {Steinicke, Nicola}, title = {Ein Erscheinungsbild f{\"u}r die Deutsche Stiftung Denkmalschutz}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {123 Seiten}, year = {2021}, abstract = {Die Deutsche Stiftung Denkmalschutz (DSD) ist die gr{\"o}ßte, private Stiftung Deutschlands, die sich f{\"u}r die F{\"o}rderung von unter Denkmalschutz stehenden Objekten einsetzt. Das neugestaltete Erscheinungsbild soll die Fachlichkeit der Organisation herausstellen und zugleich kreativ und kommunikativ eine breite Zielgruppe ansprechen. Die DSD bietet neben der Denkmalerhaltung auch Bildungsangebote f{\"u}r Jung und Alt an, wie auch Veranstaltungen f{\"u}r die Bewusstseinsbildung im Denkmalschutz. Als Sprachrohr zwischen der Stiftung und den F{\"o}rdernden dient das Magazin MONUMENTE. Denkmalschutz mag f{\"u}r manche uninteressant und eingestaubt wirken, da die Besch{\"a}ftigung mit bereits Bestehendem und das Verhindern von Verfall belanglos sein k{\"o}nnte. Weiß man allerdings {\"u}ber die Bedeutung f{\"u}r Kultur, Gesellschaft und Wirtschaft, so macht Denkmalschutz eine essenzielle Komponente unserer Kulturlandschaft aus. Die Auseinandersetzung mit der DSD soll das herausstellen und das Bewusstsein f{\"u}r diesen kulturellen Bestandteil des Denkmalschutzes vertiefen. }, language = {de} } @masterthesis{Buchenroth2021, type = {Bachelor Thesis}, author = {Buchenroth, Gina}, title = {Hanging shoes: ein Schuhregal f{\"u}r Sneaker}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {122 Seiten}, year = {2021}, abstract = {Dieses Jahr werden allein in Deutschland ca. 47 Millionen Sneaker verkauft. Die Sneakerbranche boomt und ist nicht mehr aufzuhalten. Was zu Beginn nur ein Sportschuh war, ist heute ein Lifestyleprodukt und auf dem Markt und im Alltag nicht mehr wegzudenken. Der Hype um den neuesten Sneaker ist unglaublich groß und das Bed{\"u}rfnis nach dem Pr{\"a}sentieren und dem zur Schau stellen w{\"a}chst. Mit der float collection gelingt es, den Verkaufs- und Ausstellungsraum ganz individuell und vielseitig zu gestalten. Das Besondere hier ist, dass die Schuhe sich visuell schwebend in den Regalen etablieren und so von allen Seiten betrachtet werden k{\"o}nnen. Das Konstrukt ist modular und bringt durch das Material Metall eine lange Produktlebensdauer mit sich. So bringst du nicht nur die Sneaker, sondern auch die Herzen deiner Kunden zum Schweben. Let the shoes float.}, language = {de} } @masterthesis{Bos2021, type = {Bachelor Thesis}, author = {Bos, Shania}, title = {Living Books: ein Event rund um das Thema Lesen}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {95 Seiten}, year = {2021}, abstract = {Living Books ist ein in Aachen stationiertes Event der Buchhandlungskette Mayersche, welches Kinder und Jugendliche zum Lesen animieren soll, indem Technik und Unterhaltungsmedien mit dem Buch verbunden werden. Hierzu werden die M{\"o}glichkeiten der virtuellen Realit{\"a}t genutzt sowie einzigartige Marketingstrategien, die sich ebenfalls neuartiger Technik bedienen, um das Interesse und die Neugierde junger Menschen zu wecken. Vor Ort wird man zum ersten Mal mit dem Buch konfrontiert. Bis dahin wirkt das Event schlichtweg wie ein Fantreffen zu Buchverfilmungen. Nacheinander betreten die jungen Besucher mithilfe einer VR-Brille eine Welt, die einem Buch entstammt, um ihnen die Geschichte spielerisch n{\"a}herzubringen. Mithilfe der neuen Welt und einem pl{\"o}tzlichen Ende soll Neugierde f{\"u}r das Buch geweckt werden. Das Interesse f{\"u}r die Geschichte soll am Ende gr{\"o}ßer sein als die Abneigung gegen das Lesen.}, language = {de} } @misc{Nahrstedt2021, type = {Master Thesis}, author = {Nahrstedt, Sarah}, title = {Any Cargo: Das Fahrrad als Hauptverkehrsmittel in der Stadt}, publisher = {FH Aachen}, address = {Aachen}, pages = {216 Seiten}, year = {2021}, abstract = {Durch die Urbanisierung, wird es in St{\"a}dten immer enger und der Verkehr nimmt zu. Das hat hohe Emissionen und Platzmangel zur Folge. In der Masterarbeit wurde die Abh{\"a}ngigkeit zum Auto in der Stadt hinterfragt und ein Konzept erarbeitet, welches die Autonutzung und den Autobesitz abl{\"o}st. Dabei entstand ein neuer Fahrradanh{\"a}nger, der eine multifunktionale Nutzung zul{\"a}sst und einen elektrischen Antrieb besitzt. Dadurch bietet er einen komfortablen Support im Alltag. Zudem wurde ein Gesch{\"a}ftskonzept entwickelt, welches erm{\"o}glicht, den Anh{\"a}nger mit einem digitalen Ausleihsystem unter Nachbarn oder Freunden zu teilen. Ein wichtiges Kriterium f{\"u}r das Produkt und den Service war, dass die Mobilit{\"a}t der Zukunft nicht nur nachhaltig sein soll, sondern auch Laune machen muss.}, language = {de} } @masterthesis{Dieter2021, type = {Bachelor Thesis}, author = {Dieter, Helen}, title = {Koji - Entwicklung eines h{\"o}henverstellbaren Tisches zur Nutzung in Wohn- und Essr{\"a}umen}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, pages = {135 Seiten}, year = {2021}, abstract = {Um den immer komplexer werdenden Anspr{\"u}chen an Wohnraum gerecht zu werden, braucht es M{\"o}bel, die vielseitig und anpassbar sind. Koji ist ein Tisch, dessen Tischplatte unkompliziert in der H{\"o}he verstellt werden und so in diversen Wohnsituationen eingesetzt werden kann. Er kann als Esstisch genauso genutzt werden wie als Beistell- oder Couchtisch. Durch die Mechanik, die die H{\"o}henverstellbarkeit erm{\"o}glicht, bekommt der Tisch einen verspielten, beinahe lebendigen Charakter, der zur Interaktion einl{\"a}dt. Er ist mehr als ein stummer Begleiter des Alltags, sondern vielmehr Inspiration, seine Umgebung aktiv zu gestalten, um sie so f{\"u}r sich optimal einzurichten.}, language = {de} } @article{MonakhovaDiehl2021, author = {Monakhova, Yulia and Diehl, Bernd W.K.}, title = {Novel approach of qNMR workflow by standardization using 2H integral: Application to any intrinsic calibration standard}, series = {Talanta}, volume = {222}, journal = {Talanta}, number = {Article number: 121504}, publisher = {Elsevier}, isbn = {0039-9140}, doi = {10.1016/j.talanta.2020.121504}, year = {2021}, abstract = {Quantitative nuclear magnetic resonance (qNMR) is routinely performed by the internal or external standardization. The manuscript describes a simple alternative to these common workflows by using NMR signal of another active nuclei of calibration compound. For example, for any arbitrary compound quantification by NMR can be based on the use of an indirect concentration referencing that relies on a solvent having both 1H and 2H signals. To perform high-quality quantification, the deuteration level of the utilized deuterated solvent has to be estimated. In this contribution the new method was applied to the determination of deuteration levels in different deuterated solvents (MeOD, ACN, CDCl3, acetone, benzene, DMSO-d6). Isopropanol-d6, which contains a defined number of deuterons and protons, was used for standardization. Validation characteristics (precision, accuracy, robustness) were calculated and the results showed that the method can be used in routine practice. Uncertainty budget was also evaluated. In general, this novel approach, using standardization by 2H integral, benefits from reduced sample preparation steps and uncertainties, and can be applied in different application areas (purity determination, forensics, pharmaceutical analysis, etc.).}, language = {en} } @article{EngelmannShalabyShashaetal.2021, author = {Engelmann, Ulrich M. and Shalaby, Ahmed and Shasha, Carolyn and Krishnan, Kannan M. and Krause, Hans-Joachim}, title = {Comparative modeling of frequency mixing measurements of magnetic nanoparticles using micromagnetic simulations and Langevin theory}, series = {Nanomaterials}, volume = {11}, journal = {Nanomaterials}, number = {5}, publisher = {MDPI}, address = {Basel}, isbn = {2079-4991}, doi = {10.3390/nano11051257}, pages = {1 -- 16}, year = {2021}, abstract = {Dual frequency magnetic excitation of magnetic nanoparticles (MNP) enables enhanced biosensing applications. This was studied from an experimental and theoretical perspective: nonlinear sum-frequency components of MNP exposed to dual-frequency magnetic excitation were measured as a function of static magnetic offset field. The Langevin model in thermodynamic equilibrium was fitted to the experimental data to derive parameters of the lognormal core size distribution. These parameters were subsequently used as inputs for micromagnetic Monte-Carlo (MC)-simulations. From the hysteresis loops obtained from MC-simulations, sum-frequency components were numerically demodulated and compared with both experiment and Langevin model predictions. From the latter, we derived that approximately 90\% of the frequency mixing magnetic response signal is generated by the largest 10\% of MNP. We therefore suggest that small particles do not contribute to the frequency mixing signal, which is supported by MC-simulation results. Both theoretical approaches describe the experimental signal shapes well, but with notable differences between experiment and micromagnetic simulations. These deviations could result from Brownian relaxations which are, albeit experimentally inhibited, included in MC-simulation, or (yet unconsidered) cluster-effects of MNP, or inaccurately derived input for MC-simulations, because the largest particles dominate the experimental signal but concurrently do not fulfill the precondition of thermodynamic equilibrium required by Langevin theory.}, language = {en} } @masterthesis{Wild2021, type = {Bachelor Thesis}, author = {Wild, Lisa}, title = {UKIYO: Eine Neuinterpretation der fließenden Welt}, publisher = {FH Aachen}, address = {Aachen}, school = {Fachhochschule Aachen}, year = {2021}, abstract = {Ukiyo kommt aus dem Japanischen und bedeutet {\"u}bersetzt so viel wie: „Den Moment leben, ohne von den Sorgen des Lebens ber{\"u}hrt zu werden." Gerade in Zeiten der Pandemie verliert man oft den Blick f{\"u}r das Sch{\"o}ne im Leben. Der Fotoband „UKIYO" soll dazu anregen, allt{\"a}gliche Dinge aus einem neuen Blickwinkel zu betrachten und die Sch{\"o}nheit im Verg{\"a}nglichen zu erkennen. Die Fotografien sind inspiriert durch das japanische Kunstgenre Ukiyo-e, was w{\"o}rtlich {\"u}bersetzt etwa „Bilder der heiteren, fließenden Welt" heißt. Die Gestaltung des Bildbandes orientiert sich an verschiedenen japanischen Stilmitteln, wie zum Beispiel Wabi-Sabi (die Sch{\"o}nheit im Unvollkommenen) und Mono no aware (eine melancholische Mischung aus Freude, Trauer und Hinnahme). „UKIYO" nimmt die Betrachter mit auf eine kleine Reise durch die fließende Welt. }, language = {de} } @article{SaretzkiBergmannDahmannetal.2021, author = {Saretzki, Charlotte and Bergmann, Ole and Dahmann, Peter and Janser, Frank and Keimer, Jona and Machado, Patricia and Morrison, Audry and Page, Henry and Pluta, Emil and St{\"u}bing, Felix and K{\"u}pper, Thomas}, title = {Are small airplanes safe with regards to COVID-19 transmission?}, series = {Journal of Travel Medicine}, volume = {28}, journal = {Journal of Travel Medicine}, number = {7}, publisher = {Oxford University Press}, address = {Oxford}, issn = {1708-8305}, doi = {10.1093/jtm/taab105}, year = {2021}, language = {en} } @article{KarschuckKaulenPoghossianetal.2021, author = {Karschuck, Tobias and Kaulen, Corinna and Poghossian, Arshak and Wagner, Patrick H. and Sch{\"o}ning, Michael Josef}, title = {Gold nanoparticle-modified capacitive field-effect sensors: Studying the surface density of nanoparticles and coupling of charged polyelectrolyte macromolecules}, series = {Electrochemical Science Advances}, volume = {2}, journal = {Electrochemical Science Advances}, number = {5}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {0938-5193}, doi = {10.1002/elsa.202100179}, pages = {10 Seiten}, year = {2021}, abstract = {The coupling of ligand-stabilized gold nanoparticles with field-effect devices offers new possibilities for label-free biosensing. In this work, we study the immobilization of aminooctanethiol-stabilized gold nanoparticles (AuAOTs) on the silicon dioxide surface of a capacitive field-effect sensor. The terminal amino group of the AuAOT is well suited for the functionalization with biomolecules. The attachment of the positively-charged AuAOTs on a capacitive field-effect sensor was detected by direct electrical readout using capacitance-voltage and constant capacitance measurements. With a higher particle density on the sensor surface, the measured signal change was correspondingly more pronounced. The results demonstrate the ability of capacitive field-effect sensors for the non-destructive quantitative validation of nanoparticle immobilization. In addition, the electrostatic binding of the polyanion polystyrene sulfonate to the AuAOT-modified sensor surface was studied as a model system for the label-free detection of charged macromolecules. Most likely, this approach can be transferred to the label-free detection of other charged molecules such as enzymes or antibodies.}, language = {en} } @article{Finkenberger2021, author = {Finkenberger, Isabel Maria}, title = {Wohnen als Produktionsgemeinschaftsaufgabe}, series = {Jahrbuch f{\"u}r Christliche Sozialwissenschaften}, journal = {Jahrbuch f{\"u}r Christliche Sozialwissenschaften}, number = {62}, publisher = {Aschendorff}, address = {M{\"u}nster}, issn = {0075-2584}, doi = {10.17879/jcsw-2021-3537}, pages = {31 -- 42}, year = {2021}, abstract = {Wohnen als neue soziale Frage ist mehr als die Produktion neuer Formen von Wohnen und deren architektonischer Gestalt, und auch mehr als nur die Umsetzung sich ver{\"a}ndernder, jedoch individuell formulierter Wohnw{\"u}nsche. Sie spannt sich auf zwischen gesellschafts- und nachhaltigkeitspolitischen, hardcore-kapitalistischen und globalen Rahmenbedingungen, Hardware und Software, Individuum und Gemeinwohl, Konsum und Mitgestaltung. Entscheidend sind die Akteure und die Art und Weise, wie und nach welchen Maßst{\"a}ben sie handeln. Entscheidend ist aber auch, Wohnen sowohl kontextuell wie auch programmatisch neu zu denken und dadurch zu neuen Mischungen, Nachbarschaften und Bewertungskriterien einer Projekt- und Stadtentwicklung zu kommen, die mehr als die Summe seiner Einzelteile wollen - ein gutes Leben f{\"u}r Alle abseits der Frage des Geldbeutels und der sozialen Zugeh{\"o}rigkeit.}, language = {de} } @article{HacklBuessKammerlohretal.2021, author = {Hackl, Michael and Buess, Eduard and Kammerlohr, Sandra and Nacov, Julia and Staat, Manfred and Leschinger, Tim and M{\"u}ller, Lars P. and Wegmann, Kilian}, title = {A "comma sign"-directed subscapularis repair in anterosuperior rotator cuff tears yields biomechanical advantages in a cadaveric model}, series = {The american journal of sports medicine}, volume = {49}, journal = {The american journal of sports medicine}, number = {12}, publisher = {Sage}, address = {London}, issn = {1552-3365}, doi = {10.1177/03635465211031506}, pages = {3212 -- 3217}, year = {2021}, abstract = {Background: Additional stabilization of the "comma sign" in anterosuperior rotator cuff repair has been proposed to provide biomechanical benefits regarding stability of the repair. Purpose: This in vitro investigation aimed to investigate the influence of a comma sign-directed reconstruction technique for anterosuperior rotator cuff tears on the primary stability of the subscapularis tendon repair. Study Design: Controlled laboratory study. Methods: A total of 18 fresh-frozen cadaveric shoulders were used in this study. Anterosuperior rotator cuff tears (complete full-thickness tear of the supraspinatus and subscapularis tendons) were created, and supraspinatus repair was performed with a standard suture bridge technique. The subscapularis was repaired with either a (1) single-row or (2) comma sign technique. A high-resolution 3D camera system was used to analyze 3-mm and 5-mm gap formation at the subscapularis tendon-bone interface upon incremental cyclic loading. Moreover, the ultimate failure load of the repair was recorded. A Mann-Whitney test was used to assess significant differences between the 2 groups. Results: The comma sign repair withstood significantly more loading cycles than the single-row repair until 3-mm and 5-mm gap formation occurred (P≤ .047). The ultimate failure load did not reveal any significant differences when the 2 techniques were compared (P = .596). Conclusion: The results of this study show that additional stabilization of the comma sign enhanced the primary stability of subscapularis tendon repair in anterosuperior rotator cuff tears. Although this stabilization did not seem to influence the ultimate failure load, it effectively decreased the micromotion at the tendon-bone interface during cyclic loading. Clinical Relevance: The proposed technique for stabilization of the comma sign has shown superior biomechanical properties in comparison with a single-row repair and might thus improve tendon healing. Further clinical research will be necessary to determine its influence on the functional outcome.}, language = {en} } @article{BiewendtBlaschkeBoehnert2021, author = {Biewendt, Marcel and Blaschke, Florian and B{\"o}hnert, Arno}, title = {Motivational factors in organisational change}, series = {SocioEconomic Challenges}, volume = {5}, journal = {SocioEconomic Challenges}, number = {3}, publisher = {ARMG}, address = {Sumy}, issn = {2520-6214}, doi = {10.21272/sec.5(3).15-27.2021}, pages = {15 -- 27}, year = {2021}, abstract = {The presented paper gives an overview of the most important and most common theories and concepts from the economic field of organisational change and is also enriched with quantitative publication data, which underlines the relevance of the topic. In particular, the topic presented is interwoven in an interdisciplinary way with economic psychological models, which are underpinned within the models with content from leading scholars in the field. The pace of change in companies is accelerating, as is technological change in our society. Adaptations of the corporate structure, but also of management techniques and tasks, are therefore indispensable. This includes not only the right approaches to employee motivation, but also the correct use of intrinsic and extrinsic motivational factors. Based on the hypothesis put forward by the scientist and researcher Rollinson in his book "Organisational behaviour and analysis" that managers believe motivational resources are available at all times, socio-economic and economic psychological theories are contrasted here in order to critically examine this statement. In addition, a fictitious company was created as a model for this work in order to illustrate the effects of motivational deficits in practice. In this context, the theories presented are applied to concrete problems within the model and conclusions are drawn about their influence and applicability. This led to the conclusion that motivation is a very individual challenge for each employee, which requires adapted and personalised approaches. On the other hand, the recommendations for action for supervisors in the case of motivation deficits also cannot be answered in a blanket manner, but can only be solved with the help of professional, expert-supported processing due to the economic-psychological realities of motivation. Identifying, analysing and remedying individual employee motivation deficits is, according to the authors, a problem and a challenge of great importance, especially in the context of rapidly changing ecosystems in modern companies, as motivation also influences other factors such as individual productivity. The authors therefore conclude that good motivation through the individual and customised promotion and further training of employees is an important point for achieving important corporate goals in order to remain competitive on the one hand and to create a productive and pleasant working environment on the other.}, language = {en} }