Function-oriented defect assessment in hybrid sheet molding compound tensile specimen using surrogate models

Glass fiber (GF) Sheet Molding Compound (SMC) composites are popular lightweight materials due to their good processability. Hybrid SMCs expand the field of operation, combining the high stiffness of unidirectional carbon fibers (CF) with the economic efficiency of GF. Combinations of manufacturing deviations (delamination, varying GF content, CF misorientation) occur during the production of hybrid SMCs and impede the mechanical performance of the part. A function-oriented quality assurance instead of strict tolerances is proposed. Finite element (FE) simulations are computationally too expensive for an assessment within the cycle time. Hence, surrogate models are trained on multiple parameterized FE simulations. The surrogate models shall allow for an individual functional assessment in real-time based on integrated measurement inputs. This work focuses on the generation of parametrized FE simulations for measurement inputs and surrogate modeling. Simulations and surrogate models show acceptable deviations from tensile tests for multiple combinations of manufacturing deviations. The measurement uncertainty of the stiffness prediction is assessed for both the FE simulation and the surrogate models in accordance with the Guide to the Expression of Uncertainty in Measurement (GUM)

Identification of semester-specific teaching contents for dental ethics: development, testing and validation of a questionnaire

Background Although medical ethics is an indispensable part of dental education, it has not played a relevant role in the dental curriculum thus far. This study is aimed at developing and validating a questionnaire that identifies semester-specific ethical issues, in order to develop longitudinal ethic modules. Methods March 2018 a workshop on item generation was coordinated, using Delphi method; followed by a cognitive testing with students (2nd, 4th, 10th semesters, n = 12). A pilot test was carried out with students from different semesters (n = 60). The distribution of response frequencies and missing values were determined. The questionnaire used for validation consisted of three dimensions: ethical knowledge, dealing with ethical issues, expectations in terms of teaching. The psychometric examination was carried out by preclinical students (n = 105) and clinical semesters (n = 110) January 2019. Results After cognitive testing and piloting, some items were reformulated, so that a questionnaire with 127 items was used for validation. The individual dimensions were assigned to various factors with excellent to acceptable internal consistency (Cronbach's α 0.72-0.96). Conclusion The questionnaire has an acceptable to excellent consistency and suggests that the different dimensions are conclusive. With this questionnaire, ethical issues in dentistry can be mapped and teaching contents identified

Europe's Multiple Futures: Four Futurescapes for Europe's Geopolitical Positioning in 2030

This report provides distinct storylines envisioning Europe's potential futures up to 2030. Contrary to traditional binary evaluations, these four scenarios avoid direct labeling as "good" or "bad." They delve into crucial drivers, from labor market integration to global affairs such as Russia-Ukraine conflict and Europe-China relations. Addressing the urgent need for "futures literacy" among policymakers and experts, this initiative by DGAP experts offers interpretative frameworks for upcoming challenges. Rather than predicting specifics, the scenarios prompt reconsideration of narratives and introduce counter-intuitive thinking modes for addressing global shifts and foreign policy challenges

Practice assistants in primary care in Germany - Associations with organizational attributes on job satisfaction

BACKGROUND: Job satisfaction and organizational attributes in primary care teams are important issues as they affect clinical outcomes and the quality of health care provided. As practice assistants are an integral part of these teams it is important to gain insight into their views on job satisfaction and organizational attributes. The aim of this study was to evaluate the job satisfaction of practice assistants and the organizational attributes within their general practices in Germany and to explore the existence of possible associations. METHODS: This observational study was based on a job satisfaction survey and measurement of organizational attributes in general practices in the German federal state of Baden-Wuerttemberg. Job satisfaction was measured with the 10-item ‘Warr-Cook-Wall job satisfaction scale’. Organizational attributes were evaluated with the 21-items ‘survey of organizational attributes for primary care’ (SOAPC). Linear regression analyses were performed in which each of SOAPC scales and the overall score of SOAPC was treated as outcome variables. RESULTS: 586 practice assistants out of 794 respondents (73.8%) from 234 general practices completed the questionnaire. Practice assistants were mostly satisfied with their colleagues and least of all satisfied with their income and recognition for their work. The regression analysis showed that ‘freedom of working method’ and ‘recognition of work’, the employment status of practice assistants and the mode of practice were almost always significantly associated with each subscale and overall score of SOAPC. CONCLUSIONS: Job satisfaction is highly associated with different aspects of organizational attributes for primary care (‘communication’, ‘decision-making’ and ‘stress’). Consequently, improved job satisfaction could lead to a better-organized primary care team. This implication should be investigated directly in further intervention studies with a special focus on improving the recognition for work and income

Presence and Diversity of Different Enteric Viruses in Wild Norway Rats (Rattus norvegicus)

Abstract: Rodents are common reservoirs for numerous zoonotic pathogens, but knowledge about diversity of pathogens in rodents is still limited. Here, we investigated the occurrence and genetic diversity of enteric viruses in 51 Norway rats collected in three different countries in Europe. RNA of at least one virus was detected in the intestine of 49 of 51 animals. Astrovirus RNA was detected in 46 animals, mostly of rat astroviruses. Human astrovirus (HAstV-8) RNA was detected in one, rotavirus group A (RVA) RNA was identified in eleven animals. One RVA RNA could be typed as rat G3 type. Rat hepatitis E virus (HEV) RNA was detected in five animals. Two entire genome sequences of ratHEV were determined. Human norovirus RNA was detected in four animals with the genotypes GI.P4-GI.4, GII.P33-GII.1, and GII.P21. In one animal, a replication competent coxsackievirus A20 strain was detected. Additionally, RNA of an enterovirus species A strain was detected in the same animal, albeit in a different tissue. The results show a high detection rate and diversity of enteric viruses in Norway rats in Europe and indicate their significance as vectors for zoonotic transmission of enteric viruses. The detailed role of Norway rats and transmission pathways of enteric viruses needs to be investigated in further studies.Peer Reviewe

Inklusion und Digitalisierung im Spannungsfeld von Personalisiertem und Kooperativem Lernen

Das Spannungsfeld zwischen Personalisiertem Lernen auf der einen und Kooperativem Lernen auf der anderen Seite kann anhand theoretischer und empirischer Forschungsarbeiten sowohl für inklusive als auch für digitale Lehr-Lern-Umgebungen als konstitutiv gelten. Dieser Beitrag basiert daher auf der These, dass für die Zusammenführung inklusionsorientierter und digitaler Lehr-Lern-Umgebungen Prozesse der Personalisierung bzw. Individualisierung immer auch mit interaktionistischen bzw. kooperativen Lehr-Lern-Prozessen zu verbinden bzw. auszugleichen sind. Auf Basis einer theoretischen Herleitung dieses Spannungsfelds wird dessen notwendige Balancierung als Ausgangspunkt genutzt, um anhand der webbasierten App Getch Anforderungen an inklusive Software-Lösungen für den Schulunterricht zu illustrieren. Die App, die der – individuellen und kooperativen – Dokumentation, Strukturierung und Präsentation von Lerninhalten auf Basis multidimensionaler Darstellungsformen dient, wird im Kontext aktueller Apps anhand einzelner Funktionsweisen für Lernende und Lehrende zum Einsatz im Fachunterricht vorgestellt und mithilfe einer User-Story aus dem Mathematikunterricht exemplarisch konkretisiert. Abschliessend werden anhand eines Fazits unterschiedliche Perspektiven für die unterrichtliche Nutzung von Getch sowie für die weiterführende (fach-)unterrichtliche Forschung diskutiert

Eight Weeks Later - The Unprecedented Rise of 3D Printing during the COVID-19 Pandemic : a Case Study, Lessons Learned, and Implications on the Future of Global Decentralized Manufacturing

The eruption of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (corona virus disease, COVID-19) in Wuhan, China, and its global spread has led to an exponentially growing number of infected patients, currently exceeding over 6.6 million and over 390,000 deaths as of the 5th of June 2020. In this pandemic situation, health systems have been put under stress, and the demand for personal protective equipment (PPE) exceeded the delivery capabilities of suppliers. To address this issue, 3D printing was identified as a possible solution to quickly produce PPE items such as face shields, mask straps, masks, valves, and ear savers. Around the world, companies, universities, research institutions, and private individuals/hobbyists stepped into the void, using their 3D printers to support hospitals, doctors, nursing homes, and even refugee camps by providing them with PPE. In Germany, the makervsvirus movement took up the challenge and connected thousands of end users, makers, companies, and logistic providers for the production and supply of face shields, protective masks, and ear savers. The Karlsruhe Institute of Technology (KIT) also joined the makervsvirus movement and used its facilities to print headbands for face shield assemblies and ear savers. Within this paper, the challenges and lessons learned from the quick ramp up of a research laboratory to a production site for medium-sized batches of PPE, the limitations in material supply, selection criteria for suitable models, quality measures, and future prospects are reported and conclusions drawn