Hochschule RheinMain
  • Hessen, Germany
Recent publications
Motivating landlords to deep energy retrofits is challenging, particularly if only tenants benefit from energy savings. We introduce the concept of net-benefit curves to quantify how the reduction in CO2 emissions on the macro level and the economic viability-based retrofit decision on the micro level are connected, and how climate policy instruments influence this connection. Applying this method to a typical multi-unit dwelling, we derive the parameter levels at which different policy instruments start to show an effect on the building owner’s decision to retrofit. The shape of the net-benefit curve suggests a tipping-point effect, where a slight change in policy parameters will lead from no retrofit at all to substantial retrofitting. Further policy tightening will not lead to a significant further effort, but make the retrofit decision more robust, that is, narrow the range of economically attractive retrofits. As policy instruments, we analyze prototypical systems that share energy savings, retrofit costs, or carbon taxes between landlord and tenants.
Zusammenfassung Innerhalb von multiprofessionellen Strukturen der Palliativversorgung in Krankenhäusern bedarf es eines professionellen Selbstverständnisses der Sozialen Arbeit. Der Artikel arbeitet relevante Anforderungen an professionelles Handeln von Fachkräften in diesem spezifischen Setting heraus.
Vor dem Hintergrund eines knappen historischen Abrisses der Theoriebildung in der Sozialen Arbeit der Bundesrepublik werden phänomenologische/wissenssoziologische, wissenschaftstheoretische sowie narrationstheoretische Ansätze zu ihrer Rekonstruktion diskutiert, um dann auf Strukturmuster der Theoriearchitektur und den aktuellen Diskurs einzugehen – auch im Hinblick auf die Möglichkeiten, Rationalisierungen der Praxis Sozialer Arbeit mit alten Menschen kritisch zu reflektieren.
Das Thema der Gesundheitsversorgung gilt als abwechslungs- und facettenreich. Grund dafür sind nicht nur medizin- und pflegetechnische Entwicklungen, sondern auch sich verändernde Ansprüche aufseiten der Versicherten, die (natürlich!) auf die Behandlungs-, Therapie- und Pflegeregime bzw. die dahinterliegende Versorgungsbereitstellung und -finanzierung wirken. Damit steht nicht nur die Versorgung selbst, sondern auch ihr Entwicklungspotenzial im Fokus der Öffentlichkeit. Mit den Innovationen gehen neue oder aber veränderte Regelungen einher, die von Seiten der Leistungserbringer, aber auch der Kostenträger zu administrieren sind. Die Kosten dieser Administration werden als Transaktionskosten („transaction costs“) bezeichnet, sind in verschiedenen Arrangements einerseits, aber auch im Zeitverlauf andererseits veränderlich und gelten damit als beeinflussbar. Die entsprechenden Arrangements können marktlich, also von einem externen Dienstleister, (gegen Vergütung) abgerufen oder aber in eigener Hierarchie (hierarchisch, also im eigenen Unternehmen) ausgeführt werden. Im angelsächsischen Raum unterscheidet man zwischen „market transaction costs“ und „managerial transaction costs“. Die Transaktionskostentheorie selbst ist – ähnlich wie die Lehre rund um die Verfügungsrechte („property rights“) – ein bedeutender Teil der neuen Institutionenökonomik.
Zwischen ökonomischer, sozialer und ökologischer Nachhaltigkeit bestehen Zielkonflikte. Um Pflege möglichst umwelt- und sozialverträglich anbieten zu können und aus ökonomischer Sicht rentabel zu gestalten, gilt es, ein Optimum zwischen diesen drei Dimensionen der Nachhaltigkeit herzustellen. Dies kann gelingen, wenn eine langfristige Ausrichtung auf die ökonomische Nachhaltigkeit durch eine kontinuierliche Überprüfung und Verbesserung der wirtschaftlichen Leistung, der Marktpräsenz, des Immobilienmanagements, der Beschaffungspraktiken und der Ergebnisse der Qualitätsprüfungen gelingt. Dabei muss ein starkes Augenmerk auf den unternehmerischen Risiken liegen, um diese zu vermeiden und zu beherrschen. Diese Maßnahmen sichern den wirtschaftlichen Fortbestand.
We set up an analytical optical model to emulate the absorptance spectra of light scattering, sulfur-hyperdoped silicon that we fabricate by using femtosecond laser pulses. The model allows us to distinguish between contributions to the absolute sub-bandgap absorptance from the path length enhancement of photons due to laser-induced surface roughness, on the one hand, and from the actual hyperdoped layer, on the other hand. Both effects are quantified via the two free parameters of the model. By varying the laser fluence and the areal pulse density, we create a range from almost planar to heavily structured hyperdoped Si samples that we show to behave almost like a Lambertian scatterer. The optical depth a 1 , i.e., the product of the absorption coefficient close to the Si bandgap energy and the effective thickness of the hyperdoped layer, scales with the surface area enhancement, which we identify as the main driving force for large sub-bandgap absorptances of this material type. It reaches maximum values of nearly a 1 = 0.4, which refers to an absolute absorptance of 82% at a wavelength of 1450 nm. We furthermore discuss, quantify, and reduce possible error sources when determining the absorptance of such optically rough, hyperdoped samples with a spectrophotometer.
Overall, the paper explores perspectives for future developments, identifies challenges, and potential advantages for using smart augmented reality for the future in social computing and collaborative assistance. The paper identifies seven major challenges when using computer-mediated communication today. It provides perspectives and visions on how future computer-mediated communication might be improved when Smart AR is used, especially when smart assistants are employed. Moreover, a computer system architecture has been conceived that provides direction on how the approaches suggested in the paper might be realized.
We present our concept and prototypical implementation of an avatar guide that helps museum visitors to navigate to chosen points of interest. The prototype shows an animated butterfly with interactive behavior that is controlled by a state machine. The avatar’s path can be pre-defined at an authoring stage, by walking the space with the head-mounted display and by placing path nodes interactively, or it can be generated at runtime, in which case the whole area needs to be scanned and processed beforehand. As the app is iteratively redesigned and tested with first-time users for accessibility, we report on first lessons learnt.
The construction industry is generally one of the fundamental industries of a country, weighing between 5 to 10% of the gross domestic product. Rapid changes in the construction environment require a great deal of effort for a company or project manager to maintain the project successfully. To do so, applying performance management is of crucial importance. Therefore, a systematic literature review was conducted to detect new trends and highlight the evolvement of this research topic. The conducted bibliometric analysis resulted in 1240 documents published in Scopus and Web of Science databases in the period from 2000-2021. The bibliometric indicators, network citations, and multivariate statistical analysis were obtained using JabRef, OpenRefine, Excel, and VOSviewer tools. The co-occurrence analysis showed three keywords clusters as current research hotspots that may be considered as potential research topics in the future: (1) value management in the construction industry, (2) organisation innovation and knowledge management in a particular company, and (3) project management tools and techniques for a particular construction project.
Bike-sharing systems (BSS) are offered in many cities and urban municipalities and urban areas without such systems are thinking about their introduction. In addition, many studies on BSS are available; however, neither mode nor route choice parameters are available for station-based BSS, which are required for the implementation of BSS in local and regional transport demand models. As a result, this makes it impossible to simulate demand model-based effects of these systems on other transport modes and e.g., calculate scenario-guided modal shifts. The paper presents results obtained from a survey study, which aims to estimate BSS-related choice parameters. The study combined computer-assisted telephone interviews (CATI) for a collection of revealed preferences (RP) on the use of BSS with a follow-up paper-and-pencil survey on stated preferences (SP) of 220 BSS users and non-users from the Rhine-Neckar area in mid-west Germany. Considering the three transport modes BSS, public transport (PT), and private motorized transport (PMT), results from this choice experiment and, according to behavioural parameters, allow integration of BSS in transport demand models and a simulation of modal shifts. Survey design, mode-choice experiment, and choice models are presented in this paper.
Purpose: Provision of psychosocial care is obligatory in cancer centers certified in accordance with the criteria of the German Cancer Society, but the extent to which it is utilized differs greatly between centers. Anomalous utilization percentages are discussed during certification audits. This analysis aims to describe (1) how certified centers explain psychosocial care utilization percentages during audits and (2) the measures they then plan for improving psychosocial care utilization. The aim of the analysis is to help understand patterns of psychosocial care utilization in oncology and reduce potential disparities by describing the challenges that cancer centers face and their strategies for integrating psychosocial care into routine oncological care. Methods: The content of free-text comments regarding psychosocial utilization percentages by certified centers during certification audits in 2019 was analyzed. In total, 178 comments were analyzed from 116 prostate, colorectal, and breast cancer centers in Germany, Switzerland, Austria, Italy, and Luxembourg. Results: The explanations for utilization percentages most often mentioned involved patients' levels of interest and need, outpatient care, staff shortages, inclusion of psychosocial care in other processes in the center, documentation issues, and factors regarding different legal regulations in countries outside Germany. The measures most often planned for improving psychosocial care utilization involved adjusting work processes, increasing staff resources, optimizing documentation, and establishing quality-assurance groups/task forces. Conclusion: This exploratory analysis shows that the challenges and strategies involved in incorporating psychosocial care into routine oncological care are diverse. Further research should identify process-level strategies that can promote the integration of psychosocial care. This article is protected by copyright. All rights reserved.
The productivity of a deep drawing process strongly relies on its robustness as well as the experience of the machine operator. Steadily increasing requirements regarding weight, design and efficiency lead to a production operating increasingly closer to the process limits, making it more challenging to ensure a high robustness of the process. Minimal process fluctuations caused by disturbances such as varying material properties or changing tribological conditions may negatively affect the process due to deteriorated product properties as well as an increased risk of scrap. Thus, a target-oriented adjustment of available parameters by the machine operator becomes more difficult, and an increased knowledge about the causes of defects is more important. In the past, several approaches with different combinations of sensors and actuators have been investigated to enable a stable process window based on a control system. This paper presents a method to address the need for a more robust process by developing an operator assistance system that enables the identification of the component state and provides decision support to the machine operator. The methodological approach includes a thorough process analysis to evaluate the expediency of such a system and to make a reasonable preselection of sensors in order to avoid unnecessary costs.
Die Kosten- und Leistungsträgerrechnung schließt als letztes Teilgebiet der KLR die Verrechnung von Kosten und Erlösen auf die Leistungen des Unternehmens ab. Sie führt die Einzelkosten aus der Kostenartenrechnung und die Gemeinkosten, aus der Kostenstellenrechnung sowohl für ein Stück als auch für die gesamte Herstellungs- oder Absatzmenge einer Abrechnungsperiode zusammen. Sie zeigt damit, wofür die Kosten des Unternehmens entstanden sind. Aus der Gegenüberstellung mit den korrespondierenden Erlösen, d. h. dem Preis je Stück oder den Erlösen der gesamten Herstellungs- und Absatzmenge, ermittelt sie den Stück- und Periodenerfolg. Die Kosten- und Leistungsträgerrechnung schließt als letztes Teilgebiet der Kosten- und Leistungsrechnung die Verrechnung von Kosten und Erlösen auf die Leistungen des Unternehmens ab. Sie führt die EinzelkostenEinzelkosten aus der Kostenartenrechnung und die GemeinkostenGemeinkosten, aus der Kostenstellenrechnung sowohl für ein Stück als auch für die gesamte Herstellungs- oder Absatzmenge einer Abrechnungsperiode zusammen. Sie zeigt damit, wofür die Kosten des Unternehmens entstanden sind. Aus der Gegenüberstellung mit den korrespondierenden Erlösen, d. h. dem Preis je Stück oder den Erlösen der gesamten Herstellungs- und Absatzmenge, ermittelt sie den Stück- und Periodenerfolg.
Neben der strategische Planungs- und Kontrollrechnung sind potenzialorientierte Entscheidungsrechnungen der zweite Teil einer strategischen Erfolgsrechnung. Sie stellen entscheidungsrelevante Informationen für langfristige, i. d. R. Gestaltungsentscheidungen bereit. Zunächst werden Entscheidungsrechnungen mit Bezug zum Produkt-Markt-Potenzial der SGE dargestellt.
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1,997 members
Dirk Krechel
  • Faculty of Design – Computer Science – Media
Ralf Dörner
  • Department of Design, Computer Science, Media
Matthias Kalverkamp
  • Wiesbaden Business School
Johannes Luderschmidt
  • Department of Applied Computer Science
Peter Dannenmann
  • Department of Environmental Engineering
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