Reliable line production processes and simulation tools play a central role for the structural integration of thermoplastic composites in advanced lightweight constructions. Provided that material- adapted joining technologies are available, they can be applied in heavy-duty multi-material designs (MMD). A load-adapted approach was implemented into the new fully automatic and faulttolerant thermo mechanical flow drill joining (FDJ) concept. With this method it is possible to manufacture reproducible high strength FRP/metal-joints within short cycle times and without use of extra joining elements for the first time. The analysis of FDJ joints requires a simplified model of the joint to enable efficient numerical simulations. The present work introduces a strategy in modeling a finite-element based analogous-approach for FDJ-joints with glass fiber reinforced polypropylene and high-strength steel. Combined with a newly developed section-force related failure criterion, it is possible to predict the fundamental failure behavior in multi-axial stress states. The functionality of the holistic approach is illustrated by a demonstrator that represents a part of a car body-in-white structure. The comparison of simulated and experimentally determined failure loads proves the applicability for several combined load cases.

The mol­ecular structure of ruthenocenecarbo­nitrile, [Ru([eta]5-C5H4C[triple bond]N)([eta]5-C5H5)], exhibits point group symmetry m, with the mirror plane bis­ecting the mol­ecule through the C[triple bond]N substituent. The RuII atom is slightly shifted from the [eta]5-C5H4 centroid towards the C[triple bond]N substituent. In the crystal, mol­ecules are arranged in columns parallel to [100]. One-dimensional inter­molecular [pi]-[pi] inter­actions [3.363 (3) Å] between the C[triple bond]N carbon atom and one carbon of the cyclo­penta­dienyl ring of the overlaying mol­ecule are present.

Memristive devices are popular among neuromorphic engineers for their ability to emulate forms of spike-driven synaptic plasticity by applying specific voltage and current waveforms at their two terminals. In this paper, we investigate spike-timing dependent plasticity (STDP) with a single pairing of one presynaptic voltage spike and one postsynaptic voltage spike in a BiFeO3 memristive device. In most memristive materials the learning window is primarily a function of the material characteristics and not of the applied waveform. In contrast, we show that the analog resistive switching of the developed artificial synapses allows to adjust the learning time constant of the STDP function from 25ms to 125μs via the duration of applied voltage spikes. Also, as the induced weight change may degrade, we investigate the remanence of the resistance change for several hours after analog resistive switching, thus emulating the processes expected in biological synapses. As the power consumption is a major constraint in neuromorphic circuits, we show methods to reduce the consumed energy per setting pulse to only 4.5 pJ in the developed artificial synapses.

Thin-walled, high-strength concrete elements exhibiting low system weight and great slenderness can be created with a large degree of lightweight structure using the textile-reinforced, load-bearing concrete (TRC) slab and a shell with a very high level of sound absorption. This was developed with the objective of lowering system weight, and then implemented operationally in construction. Arising from the specifications placed on the load-bearing concrete slab, the following took place: an adapted fine-grain concrete matrix was assembled, a carbon warp-knit fabric was modified and integrated into the fine concrete matrix, a formwork system at prototype scale was designed enabling noise barriers to be produced with an application-oriented approach and examined in practically investigations within the context of the project. This meant that a substantial lowering of the load-bearing concrete slab’s system weight was possible, which led to a decrease in transport and assembly costs.

Individual differences in the strength of music preference are among the most intricate psychological phenomena. While one person gets by very well without music, another person needs to listen to music every day and spends a lot of temporal and financial resources on listening to music, attending concerts, or buying concert tickets. Where do these differences come from? The hypothesis presented in this article is that the strength of music preference is mainly informed by the functions that music fulfills in people’s lives (e.g., to regulate emotions, moods, or physiological arousal; to promote self-awareness; to foster social relatedness). Data were collected with a diary study, in which 121 respondents documented the goals they tried to attain and the effects that actually occurred for up to 5 music-listening episodes per day for 10 successive days. As expected, listeners reporting more intense experience of the functional use of music in the past (1) had a stronger intention to listen to music to attain specific goals in specific situations and (2) showed a larger overall strength of music preference. It is concluded that the functional effectiveness of music listening should be incorporated in existing models and frameworks of music preference to produce better predictions of interindividual differences in the strength of music preference. The predictability of musical style/genre preferences is also discussed with regard to the present results.

Die im Rahmen von Forschungsprojekten gewonnenen Forschungsdaten sind eine wesentliche Grundlage der wissenschaftlichen Arbeit. In nahezu allen Fachdisziplinen gewinnen sie immer mehr an Bedeutung. Die Nachvollziehbarkeit und die Qualität wissenschaftlicher Forschung wird durch die Dokumentation, die langfristige Sicherung und Bereitstellung der Forschungsdaten gefördert. Außerdem stellt die Publikation und die langfristige Sicherung von Forschungsdaten bei der DFG, EU und beim BMBF in vielen Fällen eine Voraussetzung für die Förderung von Forschungsvorhaben dar. Was genau sind Forschungsdaten? Was versteht man unter dem FAIR-Prinzip? Offene Forschungsdaten: Welche Vorteile bringen sie für die Forschenden? Wo kann man Forschungsdaten archivieren und veröffentlichen? Welche Services für Forschende der TU Bergakademie Freiberg zum Thema Forschungsdaten bieten die UB Freiberg und die Kontaktstelle Forschungsdaten der SLUB/ZiH Dresden? Diese und weitere Fragen beantworten Manuela Queitsch, Koordinatorin für Forschungsdaten an der SLUB Dresden und Teammitglied an der Kontaktstelle Forschungsdaten in Dresden und Dr. Dana Kuhnert, Fachreferentin für Wirtschafts- und Rechtswissenschaften der UB Bergakademie Freiberg.

In many ways the current publishing system in rhetoric and composition, which centers on the peer-reviewed journal, undermines core values we hold for ideal scholarly communication. These values include collaboration, dialogue, participation, and public engagement. Though the current system's methods of preserving, distributing, and maintaining quality control of scholarly work contradict our values, technological developments have made possible alternative publishing models that could better uphold our values. Developing a preprint archive where scholars develop and share ideas before submitting them for publication in traditional peer-reviewed journals would bring our publishing process closer to our ideals.

Studies of the publishing practices in mathematics education have situated sets of journals in tiers of quality. These reports document the rankings and prestige of only a subset of the wealth of journals available for publishing in mathematics education. We posit that there is value, quality, and purpose to be found in journals that present studies that are of value on a regional level, and that the studies are extremely important to the field. This is particularly important for journals published in languages other than English, and the studies referenced above are almost entirely English-language journals. In this paper we seek to demonstrate that we as a field of researchers cannot discount the value and role of these regional and small-country journals. Using a case study of one small European country, we quantitatively present the areas of strength and weakness in the publishing practices in mathematics education journals that are unlikely to be seen beyond the region of their publication. We conclude with recommendations to publish in areas where research is lacking as well as recommendations to the community at large to recognize the value of such outlets.

Yes / This paper investigates the interaction phenomena of the coupled axons while the mutual coupling factor is presented as a pairwise description. Based on the Hodgkin-Huxley model and the coupling factor matrix, the membrane potentials of the coupled myelinated/unmyelinated axons are quantified which implies that the neural coupling can be characterised by the presented coupling factor. Meanwhile the equivalent electric circuit is supplied to illustrate the physical meaning of this extended model. In order to estimate the coupling factor, a data-based iterative learning identification algorithm is presented where the Rényi entropy of the estimation error has been minimised. The convergence of the presented algorithm is analysed and the learning rate is designed. To verified the presented model and the algorithm, the numerical simulation results indicate the correctness and the effectiveness. Furthermore, the statistical description of the neural coupling, the approximation using ordinary differential equation, the measurement and the conduction of the nerve signals are discussed respectively as advanced topics. The novelties can be summarised as follows: 1) the Hodgkin-Huxley model has been extended considering the mutual interaction between the neural axon membranes, 2) the iterative learning approach has been developed for factor identification using entropy criterion, and 3) the theoretical framework has been established for this class of system identification problems with convergence analysis. / This work was supported in part by the National Natural Science Foundation of China (NSFC) under Grant 51807010, and in part by the Natural Science Foundation of Hunan under Grant 1541 and Grant 1734. / Research Development Fund Publication Prize Award winner, Nov 2020.

Neck pain is the second most common musculoskeletal disorder after low back pain adding to the global burden of disease. A focus on evaluating outcomes for musculoskeletal conditions is imperative to evaluate the effect of interventions and to track the progression of disease. As evidence based practice and associated use of patient-based outcomes are taken up across different countries, it becomes imperative for cross-cultural translation studies. Given the uptake of technology in workplaces, it is also important to understand the prevalence of neck pain in this context. This thesis has focused on two objectives: 1. Translating a newly developed patient-report outcome measure of neck-related disability and testing its psychometric properties. 2. Estimating the prevalence of neck pain in computer-using workers. The first manuscript focusses on cross cultural translation and validation of ND10 (Neck difficulty10) that was designed to measure neck-related disability. A new English outcome measure for neck disability (ND10) was cross culturally translated and validated in computer users in India using forward and backward translation, and cognitive interviewing to determine a final version. The ND10-H demonstrated high reliability (ICC= 0.93) and convergent construct validity with the NDI and DASH (r= 0.78 and 0.86) The second manuscript reported the prevalence of neck pain in computer users in India. Sampling was performed in two different companies: A Spiritual Media Publication Organization (SMPO) and an Information Technology (IT) company. The companies were selected based on computer use and their willingness to participate. The survey was administered to all employees (n=150 & n=54) at these two companies. The overall prevalence of neck pain was 64%. In the IT company, 78% of employees reported neck pain; and in the SMPO the prevalence was 40%. There were no significant differences in prevalence based on gender or age. All of the IT company computer users worked more than seven hours at their computers, while 38% of the SMPO workers did so. Chronic pain was present in 48%of the total sample. The ND10-H can be used to assess neck-related disability in Hindi-speaking individuals. It should be accompanied by a valid pain measure when assessing patient outcomes. The prevalence of neck pain is high in computer-using workers in India. / Thesis / Master of Science Rehabilitation Science (MSc) / 1. Translating a newly developed patient-report outcome measure of neck-related disability and testing its psychometric properties. 2. Estimating the prevalence of neck pain in computer-using workers. The first manuscript focusses on cross cultural translation and validation of ND10 (Neck difficulty10) that was designed to measure neck-related disability. A new English outcome measure for neck disability (ND10) was cross culturally translated and validated in computer users in India using forward and backward translation, and cognitive interviewing to determine a final version. The ND10-H demonstrated high reliability (ICC= 0.93) and convergent construct validity with the NDI and DASH (r= 0.78 and 0.86)