Offenburg University of Applied Sciences
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Einfluss von Usability auf das Arbeitsengagement und die emotionale Erschöpfung von Mitarbeitenden. Eine experimentelle Längsschnittuntersuchung
No full textArbeitsbedingungen beeinflussen das Wohlbefinden von Beschäftigten fundamental. Während Belastungsfaktoren wie Überstunden gut erforscht sind, ist die Wirkung von schlecht gestalteter Software selten systematisch untersucht. Die vorliegende Studie betrachtet daher die Wirkung von Usability auf das Arbeitsengagement und die emotionale Erschöpfung bei Beschäftigten. Dabei wird angenommen, dass höhere Usability von betrieblicher Software zu einem gesteigerten Arbeitsengagement und reduzierter emotionaler Erschöpfung führt. Zur Untersuchung wurde eine experimentelle Längsschnittuntersuchung mit Kontrollgruppen-Design verwendet. Zu zwei Messzeitpunkten wurden Usability, emotionale Erschöpfung und Arbeitsengagement bei 327 Mitarbeitenden an diversen Standorten einer Unternehmensgruppe erhoben. Zwischen den Messungen wurden bei der Interventionsgruppe Usability-Verbesserungen am System vorgenommen und eine Schulung durchgeführt. Die Interventionsgruppe berichtete nach der Intervention über signifikant höheres Arbeitsengagement und reduzierte emotionale Erschöpfung. Bei der Kontrollgruppe zeigten sich diese Effekte nicht. Damit unterstützen die Befunde der vorliegenden Untersuchung die Hypothese, dass Usability Aspekte des Wohlbefindens beeinflusst. Des Weiteren leitet sich aus den Ergebnissen ab, dass im Bereich der Arbeitspsychologie vermehrt die Gebrauchstauglichkeit interaktiver Systeme in Betracht gezogen werden muss.Working conditions fundamentally affect employees’ well-being. While stress factors such as overtime are well-researched, the impact of poorly designed software is rarely systematically examined. This study, therefore, examines the effect of usability on work engagement and emotional exhaustion among employees. It hypothesizes that higher usability of workplace software leads to increased work engagement and reduced emotional exhaustion. An experimental longitudinal study with a control group design was used for the investigation. At two measurement points, usability, emotional exhaustion, and work engagement were assessed among 327 employees at various locations within a corporate group. Between the measurements, the intervention group received usability improvements to the system and training. The intervention group reported significantly higher work engagement and reduced emotional exhaustion after the intervention. These effects were not observed in the control group. The findings of this study support the hypothesis that usability influences aspects of well-being. Additionally, the results suggest that in the field of occupational psychology, the usability of interactive systems must be increasingly considered
A novel, robust peptidyl-lys metalloendopeptidase from Trametes coccinea recombinantly expressed in Komagataella phaffii
Get PDFA novel peptidyl-lys metalloendopeptidase (Tc-LysN) from Tramates coccinea was recombinantly expressed in Komagataella phaffii using the native pro-protein sequence. The peptidase was secreted into the culture broth as zymogen (~38 kDa) and mature enzyme (~19.8 kDa) simultaneously. The mature Tc-LysN was purified to homogeneity with a single step anion-exchange chromatography at pH 7.2. N-terminal sequencing using TMTpro Zero and mass spectrometry of the mature Tc-LysN indicated that the pro-peptide was cleaved between the amino acid positions 184 and 185 at the Kex2 cleavage site present in the native pro-protein sequence. The pH optimum of Tc-LysN was determined to be 5.0 while it maintained ≥60% activity between pH values 4.5—7.5 and ≥30% activity between pH values 8.5—10.0, indicating its broad applicability. The temperature maximum of Tc-LysN was determined to be 60 °C. After 18 h of incubation at 80 °C, Tc-LysN still retained ~20% activity. Organic solvents such as methanol and acetonitrile, at concentrations as high as 40% (v/v), were found to enhance Tc-LysN’s activity up to ~100% and ~50%, respectively. Tc-LysN’s thermostability, ability to withstand up to 8 M urea, tolerance to high concentrations of organic solvents, and an acidic pH optimum make it a viable candidate to be employed in proteomics workflows in which alkaline conditions might pose a challenge. The nano-LC-MS/MS analysis revealed bovine serum albumin (BSA)’s sequence coverage of 84% using Tc-LysN which was comparable to the sequence coverage of 90% by trypsin peptides
Strategy creation behaviour and "last gasp" digitalization as predictors of sales performance and cash flow
No full textPurpose
Although recent literature has examined diverse measures adopted by SMEs to navigate the COVID-19 turbulence, there is a shortage of evidence on how crisis-time strategy creation behaviour and digitalization activities increase (1) sales and (2) cash flow. Thus, predicated on a novel strategy creation perspective, this inquiry aims to investigate the crisis behaviour, sales and cash flow performance of 528 SMEs in Morocco.
Design/methodology/approach
Novel links between (1) aggregate wage cuts, (2) variable operating hours, (3) deferred payment to suppliers, (4) deferred payment to tax authorities and (5) sales performance are developed and tested. A further link between sales performance and cash flow is also examined and the analysis is conducted using a non-linear structural equation modelling technique.
Findings
While there is a significant association between strategy creation behaviours and sales performance, only variable operating hours have a positive effect. Also, sales performance increases cash flow and this relationship is substantially strengthened by e-commerce digitalization and innovation.
Originality/value
Theoretically, to the best of the authors’ knowledge, this is one of the first inquiries to espouse the strategy creation view to explain SMEs' crisis-time behaviour and digitalization. For practical purposes, to supplement Moroccan SMEs' propensity to seek tax deferrals, it is argued that debt and equity support measures are also needed to boost sales performance and cash flow
New year, new gear: Does the next version of an advanced footwear model lead to better performance?
No full textIn recent years, advanced footwear technology (AFT) has contributed to numerous world records in long-distance running, with new models being developed annually. This study investigated the effects of incremental design changes between two consecutive iterations of AFT on running economy (RE) and subjective perceptions in trained male runners. Participants completed submaximal running trials in the Adidas Adios Pro 3 and Pro 4 models. Results showed a significant 1.31% improvement in RE with the newer Pro 4 model (p < .001), with a decrease in oxygen uptake at submaximal speed. The improvement in RE, likely due to reduced shoe mass, modified rocker geometry, and altered cushioning stiffness, could potentially influence elite competition outcomes. However, while in this study, year to year performance improvements due to model updates were found, these findings not neccesarily translate to year to year modifications in other models and manufacturers. However, the findings contribute to our understanding of how subtle design modifications in successive shoe models can impact running performance
Elektro-Kapillarpumpe für Microfluidic Devices
No full textIn dieser Arbeit wurde versucht, mithilfe der Elektrokapillarität eine Pumpe zu entwickeln. Dazu wurden Versuche zum Elektrowetting-on-Dielectric (EWOD) durchgeführt. Dabei wurden unter anderem verschiedene Beschichtungen getestet, die unterschiedliche Kontaktwinkel und Kontaktwinkeländerungen erzeugen. Diese Beschichtungen wurden mit einfachen Mitteln aufgetragen, wobei die Methoden der Sprüh- und Tauchbeschichtung angewandt wurden. Es wurden Beschichtungsdicken von etwa 20 bis 40 µm erzielt. Die Beschichtungen, die in der Elektrobenetzungszelle erfolgreich waren, wurden anschließend auf einen porösen Kupferschaum übertragen. Dabei scheiterte man jedoch an der vollständigen Benetzung der Strukturen. Auch nach mehrfacher Beschichtung kam es immer wieder zur Elektrolyse.In this work, an attempt was made to develop a pump using electrocapillarity. To this end, electrowetting-on-dielectric (EWOD) tests were carried out. Various coatings were tested, which generated different contact angles and changes in contact angles. These coatings were applied using simple spray and dip coating methods, achieving coating thicknesses of around 20 to 40 µm. The coatings that were successful in the electrowetting cell were then transferred to a porous copper foam with an oxidized surface. However, this approach failed due to incomplete wetting of the structures. Even after repeated coatings, electrolysis occurred repeatedly
Static and dynamic glazing integration for enhanced building efficiency and indoor comfort with thermochromic and electrochromic windows
No full textEffective building energy efficiency requires understanding fenestration’s role in regulating indoor temperatures. Therefore, this study investigates the impact of integrating static glazing with dynamic coatings on building energy efficiency and indoor comfort in a lightweight structure situated in a semi-arid climate. Employing a comprehensive numerical model developed using EnergyPlus and Radiance tools, various static commercial glass window configurations are evaluated to assess their effects on energy consumption, thermal and visual comfort, and economic and environmental considerations. This analysis includes assessments of thermal comfort using PMV and PPD indicators and evaluations of visual comfort based on daylighting and glare metrics. The findings highlight the advantages of incorporating thermochromic and electrochromic films, demonstrating significant improvements in building energy efficiency and interior thermal and visual comfort. Notably, double glazing emerges as the most economically efficient and environmentally viable option, resulting in a reduction of emissions by 1522.38 kgCO2/year, with a payback period of 12.86 years. Furthermore, combining thermochromic and electrochromic coatings with optimal static glazing leads to a remarkable 26 % reduction in energy consumption. These results underscore the potential of dynamic coatings to enhance building energy performance while ensuring occupant comfort. This research approach provides valuable insights into sustainable building design, emphasizing the integrated impact of glazing solutions on energy use, comfort, and environmental sustainability
Projektmanagement ist so viel mehr als das Managen von Projekten
No full textWas war noch gleich zuerst da: die Henne oder das Ei? Entsteht die Notwendigkeit des Projektmanagements aus dem Start eines Projektes? Oder sind die Planungs- und Steuerungsnotwendigkeiten minimaler Herausforderungen inzwischen so komplex geworden, dass Projekte definiert und Projektmanager ausgebildet werden? Typische Aspekte professioneller Projektarbeit – Methoden und Arbeitstechniken, Prozesse und Werkzeuge – finden punktuell auch außerhalb formalisierter Projekte Anwendung im Arbeitsalltag
Verfahren und Vorrichtung zum Überwachen und Optimieren einer zeitlichen Triggerstabilität (DE102023001812A1)
No full textDie vorliegende Erfindung betrifft Vorrichtungen zum Überwachen und Optimieren einer zeitlichen Triggerstabilität einer extrakorporalen Kreislaufunterstützung sowie Steuer- und Regeleinheiten zur extrakorporalen Kreislaufunterstützung, umfassend eine solche Vorrichtung und entsprechende Verfahren. Entsprechend wird ein Verfahren zum Überwachen und Optimieren einer zeitlichen Triggerstabilität einer extrakorporalen Kreislaufunterstützung vorgeschlagen, umfassend die Schritte: Empfangen eines EKG-Signals eines unterstützten Patienten über einen vorgegebenen Zeitraum; und Bestimmen eines vorgegebenen Triggersignals (22) aus dem EKG-Signal eines aktuellen Herzzyklus. Dabei umfasst das EKG-Signal mindestens ein linksventrikuläres EKG-Signal (14) und wird das Triggersignal (14) basierend auf dem linksventrikulären EKG-Signal (14) bestimmt
Digital Healthcare Applications for Preventing Risk Factors in Dementia: Requirements Engineering in the German Healthcare System
No full textThe increasing prevalence of dementia globally, necessitates effective strategies to reduce the burden on patients, caregivers, and healthcare systems. Risk factor prevention plays a crucial role in delaying the onset of symptoms and lowering the strain on resources. But the solutions employed in the FINGER studies are not yet scalable to the wider population. With increasing digital literacy and availability of smartphones amongst the elderly, people at risk can effectively be informed and guided. In Germany, this coincides with recent launch of reimbursement pathways for digital healthcare applications (DiGA). Existing DiGAs do not yet address risk factors of dementia. By leveraging the scalability of digital solutions combined with the positive impact of education on lifestyle, we are aiming at a transfer of risk factor treatment into the wider German public healthcare system
Risikomanagement für Social Media
No full textDas Risikomanagement ist eine unternehmensweite Aktivität, die horizontal und vertikal sämtliche Aspekte eines Geschäftsmodells zu berücksichtigen hat. Für die Social-Media-Domain bedeutet das, ein Verständnis dafür zu entwickeln, wie die Aktivitäten in einen größeren digitalwirtschaftlichen Kontext eingebettet sind. Die Konnektivität und Komplexität zeigen sich besonders deutlich, wenn Unternehmen auf den Plattformen und Kanälen ein digitales Marketing betreiben möchten. Nur durch eine kritische Masse an Wissen und einen strukturierten Risikomanagementprozess können die Verantwortlichen die Vielfältigkeit und die stochastischen Variationen großer Mengen bewältigen