Offenburg University of Applied Sciences
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Reibungsfreie inkompressible Strömungen
No full textAusgehend von eindimensionalen reibungsfreien Strömungen wird die Bernoulli-Gleichung und die Energiebilanz hergeleitet. Mit der Eulerschen Betrachtungsweise wird der Unterschied zwischen stationären und zeitabhängigen Strömungen verdeutlicht und an zahlreichen Beispielen angewandt. Die zweidimensionalen reibungsfreien und inkompressiblen Strömungen werden mit der Potenzialtheorie behandelt. Die Lösungseigenschaften werden am Beispiel der Zylinderumströmung ohne und mit Zirkulation aufgezeigt
Effect of downhill running on biomechanical risk factors associated with iliotibial band syndrome
No full textThe purpose of this study was to identify the influence of downhill running on biomechanical risk factors for iliotibial band syndrome. We conducted a 3D motion analysis of 22 females and males running on an instrumented treadmill at four different inclinations (0%, -5%, -10%, -15%) at a speed of 3.5 m/s. We found significant differences for biomechanical risk factors associated with iliotibial band syndrome. Peak knee flexion angle at initial ground contact (p < .001), peak knee adduction angle (p = .005), and iliotibial band strain (p < .001) systematically increased with increasing slope. Downhill running increases biomechanical risk factors for iliotibial band syndrome. Our results highlight the need to consider the individual running environment in assessing overuse injury risk in runners
Physical Activity During Lockdowns Associated with the COVID-19 Pandemic: A Systematic Review and Multilevel Meta-analysis of 173 Studies with 320,636 Participants
Get PDFBackground: Many countries have restricted public life in order to contain the spread of the novel coronavirus (SARS-CoV2). As a side effect of related measures, physical activity (PA) levels may have decreased.
Objective: We aimed (1) to quantify changes in PA and (2) to identify variables potentially predicting PA reductions.
Methods: A systematic review with random-effects multilevel meta-analysis was performed, pooling the standardized mean differences in PA measures before and during public life restrictions.
Results: A total of 173 trials with moderate methodological quality (modified Downs and Black checklist) were identified. Compared to pre-pandemic, total PA (SMD − 0.65, 95% CI − 1.10 to − 0.21) and walking (SMD − 0.52, 95% CI − 0.29 to − 0.76) decreased while sedentary behavior increased (SMD 0.91, 95% CI: 0.17 to 1.65). Reductions in PA affected all intensities (light: SMD − 0.35, 95% CI − 0.09 to − 0.61, p = .013; moderate: SMD − 0.33, 95% CI − 0.02 to − 0.6; vigorous: SMD − 0.33, − 0.08 to − 0.58, 95% CI − 0.08 to − 0.58) to a similar degree. Moderator analyses revealed no influence of variables such as sex, age, body mass index, or health status. However, the only continent without a PA reduction was Australia and cross-sectional trials yielded higher effect sizes (p < .05).
Conclusion: Public life restrictions associated with the COVID-19 pandemic resulted in moderate reductions in PA levels and large increases in sedentary behavior. Health professionals and policy makers should therefore join forces to develop strategies counteracting the adverse effects of inactivity
Education for Resource Efficiency in Manufacturing Industries EREMI
No full textThe EREMI project is a 2-year project funded under the ERASMUS+ framework programme and its team has developed and will validate an advanced higher education program, including life-long learning, on the interdisciplinary topic of resource efficiency in manufacturing industries and the overall system optimization of low or not digitized physical infrastructure. All of these will be achieved by applying IoT technologies towards efficient industrial systems, and by utilizing a high-level educated human capital on these economically, politically, and technically crucial and highly relevant topics for the rapidly developing industries and economies of intensively economically and industrially transforming countries - Bulgaria, North Macedonia, and Romania. Efficiency will be attained by utilizing the experience and expertise of the involved German partner organisation
Benchmarking of Symmetric Cryptographic Algorithms on a Deeply Embedded System
Get PDFIn this paper, we study the runtime performance of symmetric cryptographic algorithms on an embedded ARM Cortex-M4 platform. Symmetric cryptographic algorithms can serve to protect the integrity and optionally, if supported by the algorithm, the confidentiality of data. A broad range of well-established algorithms exists, where the different algorithms typically have different properties and come with different computational complexity. On deeply embedded systems, the overhead imposed by cryptographic operations may be significant. We execute the algorithms AES-GCM, ChaCha20-Poly1305, HMAC-SHA256, KMAC, and SipHash on an STM32 embedded microcontroller and benchmark the execution times of the algorithms as a function of the input lengths
Evaluation of an Inertial and Optical Sensors Based Mapping and Localization System
No full textThe visual-inertial mapping and localization system maplab is analyzed by its implementation and subsequent evaluation. The mapping or localization is based on environmental feature detection. In addition to creating maps, there is also the option of fusion of several maps and thus mapping extensive areas and using them for further analysis of data. In this way, various software tools can be used to optimize the existing data sets.
Two sensor components are needed: an inertial measuring unit (IMU) and a monochrome camera, which are combined by a hardware rig and put into operation for the analysis of the visual-inertial system. System calibration is crucial for precision and system functioning and is based on nonlinear dynamic state estimation. This ensures the best possible estimate of the position of the environmental feature and the map. Maplab is particularly suitable for mapping rooms or small building complexes as the implementation and evaluation of the results in different application scenarios show. Special emphasis is laid on the evaluation of larger scenarios, in which is shown, that the system is struggling to keep up geometric consistencies and thus provide an accurate map
Method and device for determining the state of charge and the state of health of a rechargeable battery (AU2020367926A1)
No full textThe invention relates to a method and to a device for determining the state of charge (SOC) of a rechargeable battery (106) of a specified battery type or a parameter physically related thereto, in particular a remaining charge amount Q contained in the battery, the method operating by means of a voltage-controlled battery model (102), which is parameterized for the battery (106) in question or a corresponding battery type. It is merely necessary to measure the battery voltage
Technology Lifecycles and Digital Technologies: Patterns of Discourse across Levels of Materiality
No full textThe technology lifecycle model is extensively used to study technology evolution and innovation. However, this model was developed for industrial-age material technologies and does not address digital technologies with nonmaterial elements. Therefore, a question emerges as to whether the level of technological materiality is implicated in different dynamics of innovation, as reflected in the technology lifecycle. Digital technologies evolve through discourse that involves interactions among multiple stakeholders that shape the evolutionary trajectory of the technology. Therefore, we set out to examine whether discourse about digital technologies that vary in their level of materiality manifests in different ways throughout these technologies’ lifecycles. To do so, we conducted a study comparing the discourse around 10 digital technologies—five highly material and five highly nonmaterial—at different stages of their technology lifecycles. We identified three characteristics of discourse—volume, volatility, and diversity—and examined them for the 10 digital technologies by analyzing their corresponding Wikipedia articles. Our findings show that the discourse around technologies with different levels of materiality is similar in the initial era of the lifecycle but diverges in the two subsequent eras. In addition, we found that the discourse around highly nonmaterial technologies remains elevated for longer time periods, compared to highly material technologies. Based on these results, we put forth propositions that challenge and extend existing research on the relationships between the technological level of materiality, discourse, and trajectories of technology evolution
Mustertexte zum Strafprozess
No full textAls Referendarin oder Referendar sieht man sich zumeist das erste Mal richtig mit dem Strafprozessrecht konfrontiert. Im staatsanwaltschaftlichen Dezernat bzw. in der richterlichen Abteilung erweist sich dabei oft die praktische Umsetzung der gefundenen materiellrechtlichen Lösung als größte Hürde. Die Formulierung einer Verfügung oder eines Beschlusses kostet meist wertvolle Zeit, wichtige Details laufen Gefahr, übersehen zu werden.
Das Werk enthält alle Formulare für jede erdenkliche Situation und Aufgabenstellung, beispielhaft ausgefüllte Verfügungen und Beschlüsse sowie Urteile, in denen alle typischen Situationen des Strafprozesses dargestellt werden. Die jeweils relevanten Vorschriften sowie die einschlägige und aktuelle Rechtsprechung werden zu Beginn der Kapitel angeführt.
Die Benutzerin und der Benutzer erhalten auf diese Weise Einblick in die grundlegenden Strukturen des Strafverfahrens und zugleich einen Wegweiser für eine schnelle und gründliche Einarbeitung in die Praxis.
Für jungen Juristinnen und Juristen, die sich in die strafprozessuale Praxis einarbeiten müssen und schnelle und maßgerechte Lösungsvorschläge suchen, ist dieser Band ein ideales Hilfsmittel
Entwurf einer Social Media Strategie für agile Berater*innen in kleinen B2B-Unternehmen – am Beispiel der Emendare GmbH & Co. KG
No full textDas Ziel der vorliegenden Arbeit ist es, einen Leitfaden für eine Social Media Strategie für agile Berater*innen in kleinen B2B-Unternehmen zu entwerfen. Diese Strategie wird beispielhaft für die Emendare GmbH & Co. KG angewendet. Aus der Zielsetzung ergibt sich folglich die Fragestellung: „Wie können kleine B2B-Unternehmen der Beratungsbranche und deren agilen Berater*innen Social Media zielführend nutzen?“. Auf Basis einer ausführlichen Literaturrecherche werden zu Beginn alle theoretischen Grundlagen aufgezeigt. Für die Ausarbeitung der Social Media Strategie wird auf eigenständige Recherchen und Analysen mithilfe von Analyse-Tools, Literaturrecherchen und eine unternehmensinterne Online Umfrage zurückgegriffen. Die Literaturrecherche zu Beginn zeigt, dass die Orientierung an einem Planungsprozess für eine effektive Nutzung von Social Media durch Unternehmen unabdinglich ist. Aufgrund dessen wird sich für die weitere Vorgehensweise an dem Planungsprozess von Christopher Zerres orientiert. Dabei werden zunächst in einer Situationsanalyse alle internen und externen Gegebenheiten untersucht. Im Anschluss werden Ziele definiert, Strategien ausgearbeitet und Implementierungsmöglichkeiten aufgezeigt. Letztendlich zeigt die Arbeit, dass die Nutzung von Social Media für kleine B2B-Unternehmen, wie die Emendare GmbH & Co. KG, von großem Nutzen ist, wenn eine strategische Vorgehensweise verfolgt und kontinuierlich kontrolliert wird.The aim of this paper is to design a guideline for a social media strategy for agile consultants in small B2B companies. This strategy is exemplarily applied to Emendare GmbH & Co. KG. The objective leads to the question: “How can small B2B companies in the consulting industry and their agile consultants use social media in a targeted manner?”. Based on an extensive literature research, all theoretical basics are shown at the beginning. For the elaboration of the social media strategy, independent research and analysis with the help of analysis tools, literature research and a company-internal online survey are used. The literature research at the beginning shows that orientation on a planning process is indispensable for the effective use of social media by companies. For this reason, the planning process of Christopher Zerres will be used as a basis for the further procedure. First, all internal and external circumstances are examined in a situation analysis. Subsequently, goals are defined, strategies are worked out and implementation possibilities are shown. Ultimately, the work shows that the use of social media can be of great benefit to small B2B companies, such as Emendare GmbH & Co. KG, if a strategic approach is followed and continuously monitored