3633 research outputs found
Sort by
Green hydrogen for future energy demand in Germany
No full textGermany aims to achieve carbon-neutral electricity generation by 2045. As a part of this plan, solar and wind electricity generation is expected to increase significantly. Since renewable energy sources are highly volatile and intermittent, this leads to periods of energy surplus and deficit, resulting in need of energy storage solutions for efficient utilisation of renewable energy sources and grid stabilisation. The current paper proposes the utilisation of hydrogen as an energy storage system to balance the supply and demand dynamics in Germany for 2045 with an electrolyser sizing of 155 GW and a fuel cell sizing of 123 GW as a sustainable and profitable hydrogen system sizing for Germany in 2045. The paper illustrates that, fuel cell and electrolyser sizing can fully compensate for the future power deficit exacerbated by heating electricity and battery electric vehicles charging demand of Germany
Nutzung von unterschiedlich strukturierten Daten zur Fehleranalyse in Produktionsbetrieben: Eine prototypische Beispielimplementierung
Get PDFDer Einsatz von Daten mit unterschiedlicher Struktur zur Fehleranalyse in der Produktion ist eine große Herausforderung für Industrieunternehmen. Dieser Artikel zeigt einen prototypischen Lösungsweg auf, wie die Integration von unterschiedlich strukturierten Daten zur Fehleranalyse gelingen kann. Anhand eines Fallbeispiels wird ein Prototyp konzipiert und umgesetzt, der verschiedene Verfahren zur Analyse von Daten unterschiedlicher Struktur kombiniert und die spezifischen Anforderungen in der datengetriebenen Produktionsfehleranalyse adressieren kann. Das Ergebnis zeigt eine innovative Möglichkeit zur datengetriebenen Fehleranalyse für die Produktion, in der unterschiedlich strukturierte Daten eingesetzt und verschiedene Analyseverfahren miteinander nutzendstiftend verbunden sind. Die Evaluation durch Experten zeigt ferner, dass der vorgeschlagene prototypische Lösungsweg für den Einsatz in der Praxis geeignet ist und einen Mehrwert für Unternehmen stiften kann. Aufbauend auf diesen Erkenntnissen werden Implikationen benannt, Limitationen aufgezeigt und zukünftiger Forschungsbedarf abgeleitet.The integration of data with varying structures for error analysis in production poses a significant challenge for production enterprises. This article presents a prototype solution for successfully integrating differently structured data for error analysis. A sample case is used to design and implement a prototype that combines various methods for analysing data with different structures, addressing the specific requirements of a data-driven production error analysis. The results demonstrate an innovative approach to implement data-driven error analysis in production. This approach combines differently structured data and analysis methods in a beneficial way. Experts evaluated the proposed prototype solution and found it suitable for practical use, creating added value for enterprises. Based on these findings, implications were identified, limitations were described, and future research needs were derived
Development of a prototype for semi-automatic surgical reporting
No full textIntroduction: After every surgical procedure, the surgeon is responsible for preparing an individual surgical report. This is often done with a time delay and relies on the correct memory of the surgeon, which can lead to inaccurat documentation. Semiautomatic recording, systematic storage and text processing of all intraoperative data would be time saving for the surgeon and form the foundation for quality management and subsequent data analysis.
Method: In collaboration with the school of informatics at Reutlingen University, the prototype of a semi-automatic checklist tool was developed using the example of cochlear implantation. The basis for this is a BPMN model (Business Process Model and Notation) of the procedure, which was created using a workflow analysis of the surgical process of cochlear implantation. Based on this, automatically generated, dynamic checklists are displayed via a user interface on an Android tablet. The intraoperative interaction, handeling of different input devices and the verification of medical correctness were tested on a phantom model.
Results: The user interface allows a simple intuitive handling by the surgeon or assistant, which can be well implemented in the intraoperative setting. The checklist allows individual recording and storage of both clinical data and surgical steps. In addition, an automated surgical report can be generated, customized and saved. The dynamic generation of the checklist via a BPMN model allows the easy transfer of the tool to other use cases.
Summary: The utilization of a dynamic checklist tool simplifies the collection, storage, and analysis of surgical data. Its potential for broader applications in clinical practice awaits further exploration via clinical studies are planne
Flexible Formen internationalen Arbeitens – internationales Personalmanagement in Zeiten gesellschaftlicher, wirtschaftlicher und geopolitischer Veränderungen
No full textDie Geschwindigkeit, mit der sich die Art, wie wir arbeiten, in den letzten Jahren gewandelt hat, ist enorm. Was vor ein paar Jahren noch als innovativer Arbeitsplatz galt (mobile Arbeitsplätze, offene Großraumbüros mit Kaffeeecken zum informellen Austausch), ist heute schon wider veraltet. Zukunftsorientierte Büros stehen leer, die Mitarbeiter arbeiten von zu Hause und was gefragt ist, sind innovative Ideen für einen sozialen Austausch zwischen mobilen Mitarbeitern und für virtuelle Begegnungen. Auch die Organisationsformen internationaler Mobilität haben sich erheblich gewandelt. Während vor einigen Jahren zunächst verschiedene Alternativen zur klassischen Langzeitentsendung in den Blick kamen, z.B. Kurzzeitentsendung, Vielflieger-Entsendung und Flexpatriate-Entsendung (Collings et al. 2007), wird heute über eine noch stärkere Flexibilisierung internationaler Arbeitseinsätze und über internationale Formen des „Work-from-Anywhere“ (Choudhury 2020) diskutiert. Wie kommt es zu diesen Veränderungen und wie können Unternehmen die aktuellen Trends globaler Mobilität erfolgreich bewältigen
Hybrid transformational leadership : insights and best practices from leaders at Microsoft (Part 1)
No full textThe COVID-19 pandemic had a significant impact on organizations, economies, and the workplace. The pandemic forced employees to work remotely, and by 2020, around 17.4% of the global workforce was working from home (ILO, 2022). As we move forward, 57% of remote workers are considering a hybrid work model. This is indicating a trend towards hybrid arrangements, as it provides employees with the flexibility to carry out their job responsibilities in diverse settings and offers more flexibility and improved quality of life (Iqbal et al., 2021). As technology continues to evolve and workforces continuously become more hybrid, a new approach has emerged: hybrid transformational leadership
KI-basierte Verhandlungsroboter im B2B-Bereich : Einfluss, Status quo und Zukunftsperspektiven
No full textIn den letzten Jahren wurden bedeutende Fortschritte im Bereich automatisierter Verhandlungen durch KI-basierte Chatbots erzielt. Die durchgeführte Studie untersucht Voraussetzungen und Einsatzmöglichkeiten, Potenziale und Grenzen dieser Technologie sowie die Auswirkungen der Nutzung von Verhandlungsbots auf die Rolle von Vertriebsmitarbeitenden. Dabei werden sowohl die Chancen als auch die potenziellen Risiken beleuchtet, die mit der Automatisierung von Verhandlungsprozessen und der Anpassung an veränderte Kommunikationspräferenzen der Kundschaft einhergehen
Increasing energy resilience, saving costs, and curbing emissions with systemic efficiency approaches
No full textSystemic efficiency necessitates clarity about the aspired goal, available and feasible input factors for the desired outcomes and knowledge of the current state. This principle applies regardless of the sector or the level of flight. The common thread is that collaboration between the various stakeholders is of the essence. Beyond technological solutions, business model, education, training, and behavioural aspects must also be considered.
Increasing energy resilience, saving costs, and reducing emissions are thus inextricably linked to how effectively we integrate and optimise the interaction of the individual factors of any system technical, economic, organisational, and human, as well as the resources and specifics that exist or are available on site.
Electrification of industrial processes is an important step towards reducing dependence on fossil fuels, but challenges such as process changes and financial feasibility need to be addressed. Process heating and cooling, which account for a significant proportion of industrial energy consumption and are often fuelled by fossil fuels, are a key focus. However, the exploitation of unused waste heat potential is hampered by a lack of knowledge, so that large potentials remain unrecognised or neglected.
Overcoming this fateful barrier constitutes the biggest lever to reduce energy-related emissions from the industrial sector, eases the energy crisis and is the issue that is most important for achieving systemic efficiency: electrification or easier fuel switching both have an impact on one-off and ongoing costs, raise questions about ongoing security of supply, but also have a strong impact on systemic efficiency. This is due to the conversion efficiency in conjunction with the energy efficiency of the process. Due to the associated costs and availability, the identification of unnecessary consumption and utilisation of waste heat to reduce energy demand represents a huge – often untapped or underestimated – opportunity for many.
Drawing from meetings, reports and documents around the Group of Experts on Energy Efficiency of the United Nations Economic Commission for Europe, as well as exchange with practitioners, researchers and conferences, the heuristic approach applied in this paper aims at shedding light on the concept of systemic efficiency, providing examples across numerous application areas and levels of flight to underline the broad relevance and applicability and thus enabling stakeholders to replicate the approach to various contexts
Composite polymer/wax coatings as a corrosion barrier of bioresorbable magnesium coronary stents
Get PDFMagnesium and its alloys are suitable materials for biodegradable biomedical implants such as cardiovascular stents. Here we introduce an innovative composite polyelectrolyte multilayer/wax coating applied to commercial coronary Mg-based stents serving as a barrier layer effectively retarding corrosion. This hydrophobic coating, build by layer-by-layer technology, appeared very thin, smooth, homogeneous, strongly adherent and completely covering the surface of the Mg-stent. In-vitro degradation tests showed greater resistance to degradation of coated Mg-stents compared to uncoated and passivated ones. Cytocompatibility studies proved that Mg-stent coated with the composite coating was non-cytotoxic and improved fibroblast cell viability compared to the uncoated Mg-stent
Mode und Nachhaltigkeit: Kooperation von Schule und Hochschule
No full textBildungseinrichtungen wie Schulen oder Hochschulen integrieren zunehmend Umweltthemen in ihre Lehrpläne und extracurricularen Aktivitäten. Gemeinsam bieten das Friedrich-List-Gymnasium Reutlingen und das TEXOVERSUM, die Textil-Fakultät der Hochschule Reutlingen, daher für Schüler:innen der Oberstufe einen Seminarkurs zum Thema „Mode und Nachhaltigkeit“ im Schuljahr 2023/2024 an
Stärken von Cobots und Menschen kombinieren : MRK unterstützt Entscheidungsfindung zur Befähigung einer Kreislaufwirtschaft
Get PDFDas Konzept der zirkulären Wertschöpfung beschreibt ein nachhaltiges Wirtschaftssystem. Aktuell ist es jedoch herausfordernd den Produktlebenszyklus so zu erweitern, damit Produkte langfristig im Wirtschaftssystem erhalten bleiben. Erforderlich sind Ansätze, mit denen Produktzustände diagnostizierbar sind und unkompliziert der bestmögliche Rückgewinnungsweg dargestellt werden kann. An dieser Stelle setzt dieser Beitrag an. Aufgezeigt wird, wie eine Mensch-Roboter-Kollaboration MRK die Entscheidungsfindung für eine Kreislaufwirtschaft befähigen kann.The concept of circular value creation describes a sustainable economic system. However, it is currently challenging to extend the product life cycle so that products remain in the economic system long-term. Approaches are required to diagnose the condition of products and to easily identify the best possible recovery path. This article starts at this point. It shows how human-robot collaboration can enable decision-making for a circular econom