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The effects of long-term exposure to microgravity and body orientation relative to gravity on perceived traveled distance
No full textSelf-motion perception is a multi-sensory process that involves visual, vestibular, and other cues. When perception of self-motion is induced using only visual motion, vestibular cues indicate that the body remains stationary, which may bias an observer’s perception. When lowering the precision of the vestibular cue by for example, lying down or by adapting to microgravity, these biases may decrease, accompanied by a decrease in precision. To test this hypothesis, we used a move-to-target task in virtual reality. Astronauts and Earth-based controls were shown a target at a range of simulated distances. After the target disappeared, forward self-motion was induced by optic flow. Participants indicated when they thought they had arrived at the target’s previously seen location. Astronauts completed the task on Earth (supine and sitting upright) prior to space travel, early and late in space, and early and late after landing. Controls completed the experiment on Earth using a similar regime with a supine posture used to simulate being in space. While variability was similar across all conditions, the supine posture led to significantly higher gains (target distance/perceived travel distance) than the sitting posture for the astronauts pre-flight and early post-flight but not late post-flight. No difference was detected between the astronauts’ performance on Earth and onboard the ISS, indicating that judgments of traveled distance were largely unaffected by long-term exposure to microgravity. Overall, this constitutes mixed evidence as to whether non-visual cues to travel distance are integrated with relevant visual cues when self-motion is simulated using optic flow alone
Temperature-Dependent Operando Raman Analysis of a WO3-Based Metal-Oxide Gas Sensor Detecting Triacetone Triperoxide
Get PDFIn this work, the surface reactions of the homemade explosive triacetone triperoxide on tungsten oxide (WO3) sensor surfaces are studied to obtain detailed information about the chemical reactions taking place. Semiconductor gas sensors based on WO3 nanopowders are therefore produced and characterized by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. To analyze the reaction mechanisms at the sensor surface, the sensor is monitored online under operation conditions using Raman spectroscopy, which allows to identify the temperature-dependent sensor reactions. By combining information from the Raman spectra with data on the changing resistivity of the underlying semiconductor, it is possible to establish a correlation between the adsorbed gas species and the physical properties of the WO3 layer. In the results, it is indicated that a Lewis acid–base reaction is the most likely mechanism for the increase in resistance observed at temperatures below 150 °C. In the results, at higher temperatures, the assumption of a radical mechanism that causes a decrease in resistance is supported
Lernpotenzial für die deutsche Berufsbildungspolitik?: Integrationserfahrungen der Geflüchteten aus der Ukraine und das Berufsbildungssystem
No full textMath for Business and Economics: Compendium of Essential Formulas
No full textThis 3rd edition revised and extended compendium contains and explains essential mathematical formulas within an economic context. Newly added content introduces the mathematical practical application of optimization by using the Lagrange function, presenting the issue of linear optimization cases where the relative extremes (minima or maxima) of a linear (target) function can be determined under restrictive linear constraint and its relevance for business management practice
Formelsammlung Wirtschaftsmathematik: Wissen kompakt für Studierende und Praktiker
No full textDiese etablierte Formelsammlung enthält und erklärt mathematische Formeln innerhalb ökonomischer Zusammenhänge, wie sie in den Wirtschaftswissenschaften und in der wirtschaftswissenschaftlichen Praxis unbedingt notwendig sind. Das Verständnis der Formeln und deren praktische Anwendung werden durch nützliche Hilfen und erklärliche Beispiele sinnvoll unterstützt, so dass der Kontext wirtschaftsmathematischer Formeln klar und verständlich dargestellt wird. Diese Formelsammlung ist ein unverzichtbares Tool für Studierende der Wirtschaftswissenschaften, aber auch ein nützliches Nachschlagewerk für Verantwortliche aus Wirtschaft, Politik und Lehre. Die Inhalte wurden für die 6. Auflage teilweise überarbeitet und ergänzt. (Verlagsangaben
Einordnung und Hintergrund
No full textDigitale Produkte und Dienstleistungen sind integraler Bestandteil des Alltags. Mobile Geräte sind in jedem Bereich präsent, vom Finanzmanagement bis zur Gesundheitsversorgung. Die Art des Konsums hat sich mit der Digitalisierung des Alltags der Verbraucher:innen grundlegend gewandelt, was neben Fragen nach Geschäftsmodellen auch solche nach Verbraucherschutz und Nachhaltigkeit aufwirft. Die Verbraucherinformatik untersucht diese Entwicklungen und ihre Auswirkungen auf Gesellschaft und Individuen. Dieses Kapitel gibt eine Einführung in die Disziplin und skizziert die Entwicklung des digitalen Konsums sowie die damit verbundenen Veränderungen für die Verbraucher:innen von der Verbreitung der ersten Heimcomputer bis heute. Zudem stellt es zentrale Grundbegriffe vor und gibt einen Überblick über das didaktische Konzept sowie die Inhalte der weiteren Kapitel des Lehrbuchs
'Not a panacea' - Expert perspectives on the concept of resilience and its potential for palliative care
No full textBACKGROUND
Resilience is an increasingly used term in medicine and subject to various definitions, often not easy to grasp. There are established core concepts for patients receiving palliative care, for example, meaning in life, that have already been researched a lot. Resilience, relative to these concepts, is a new object of research in palliative care, where it has so far been used predominantly with regard to the well-being of teams.
AIM
To explore how experts in palliative care define the concept of resilience and its suitability for patients, significant others, and professionals.
DESIGN
Qualitative study using summarizing content analysis according to Mayring.
SETTING/PARTICIPANTS
Twenty-one health and social care professionals with expertise caring for persons with life-threatening/limiting illnesses and their relatives were interviewed in three individual interviews and four focus groups. All conversations were recorded, transcribed, coded via MAXQDA, and validated by another researcher.
RESULTS
Resilience has been described as something procedural, dynamic, individual, and flexible. In connection with well-known concepts such as posttraumatic growth or terms from the field of mindfulness, social environment or personal factors have also been linked to resilience. Resources such as spirituality can contribute to resilience, and resilience itself can function as a resource, for example, by contributing to quality of life. An active use of the term in practical work with patients or relatives is rare, but it is used in education or team measures. Limited lifespan can pose a challenge to an active use of the concept of resilience.
CONCLUSION
Resilience as a very individual approach provides added value to other core concepts of palliative care. Within the palliative context, the normative dimension of resilience must be well reflected. A broader definition of resilience is recommended, leaving room for everyone to find their own form of resilience. The concept of resilience in palliative care includes opportunities as well as risks and should, therefore, be implemented carefully, requiring specific training.
What experts think about resilience in palliative care Why was this study done? Resilience is described as a process of coping with stress or adversity while remaining physically and mentally functional. Resilience is subject to a range of definitions. In the context of palliative care, where many other concepts, such as meaning in life, are already used, the definition of resilience also represents a challenge. We wanted to learn how people working in palliative care, defined by us as experts, understand and use the concept of resilience. In addition, there are three different target groups for resilience: patients, significant others and professionals. We wanted to learn about the differences in the application of resilience to these groups. What did the researchers do? We conducted interviews with a total of 21 experts in individual and group settings (so-called focus groups). All interviews and focus groups were audiotaped and transcribed verbatim to analyse them precisely using qualitative methods. What did the researchers find? This study shows how resilience is understood in the work field of the participants: namely as something procedural, dynamic, individual and flexible but normative at the same time. Factors such as the social environment, the number and intensity of crises already experienced (known as the idea of posttraumatic growth), aspects from the field of mindfulness or spirituality can contribute to developing resilience, which is why we call these things resources for resilience. Experts use the term resilience less in their daily work with patients or significant others, but more in education. What do the findings mean? The concept of resilience in palliative care involves both risks and opportunities. Practical work with the concept has to be well reflected and must be applied sensitively. Therefore, it is essential that professional as well as informal caregivers receive specific training that also includes respect for each individual’s personal concept of resilience
Trust in Robot Benchmarking and Benchmarking for Trustworthy Robots
No full textTrustworthy evaluation of robots is necessary for them to be deployed and accepted in society. Scientific benchmarking competitions provide a way to evaluate robots outside of lab conditions. We propose a progressive and iterative benchmarking process through competitions, which incorporates an objective dataset-based evaluation, evaluation on a remote robot, and field evaluations for individual robot functionalities and complete tasks, in a cyclical process similar to the machine learning lifecycle, with a view to achieving trustworthy evaluation. The inclusion of out-of-distribution data, failure scenarios and user studies as part of the benchmarking process addresses the necessity to evaluate robot systems on non-functional qualities such as fault tolerance, adaptability, social acceptance, in addition to their functional abilities to improve trustworthiness