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Influence of Microstructure and Defects on Mechanical Properties of AISI H13 Manufactured by Electron Beam Powder Bed Fusion
(2021-08-04)
Electron beam powder bed fusion (E-PBF) is a well-known additive manufacturing process. Components are realized based on layer-by-layer melting of metal powder. Due to the high degree of design freedom, additive manufacturing came into focus of tooling industry, especially for tools with sophisticated internal cooling channels. The present work focuses on the relationships between processing, microstructure evolution, chemical composition and mechanical properties of a high alloyed tool steel AISI H13 (1.2344, ...
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Single-wall carbon nanotubes-chitosan nanocomposites: Surface wettability, mechanical and thermal properties
(2021-04-14)
Functionalized single-wall carbon nanotubes (f-SWCN) are dispersed in chitosan films by self-assembly of both components in aqueous media. This carbon form is a promising nanofiller to achieve nanocomposites with refined thermal, mechanical and surface features. In this study, we investigated the influence of functionalized single-wall carbon nanotubes concentration on the resulting properties of the nanocomposites structures. Functionalized single-wall carbon nanotubes are dispersed on a molecular scale in the ...
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The “Nested” Power of TNCs: Smallholders’ Biggest Challenge
(2021-07-15)
The plight of smallholder farmers vis-à-vis their highly concentrated input providers and distributors is well known. This article highlights the embeddedness of dyadic power relations within broader economic, political, and social institutions governing the relations between transnational corporations (TNCs) and smallholders. It provides a Gramscian gaze into the deep roots of TNCs in the neoliberal historic bloc and argues that challenging the power of the TNCs requires a comprehensive strategy that goes much beyond ...
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Neuorientierung für das Business-Coaching
(2021-08-16)
Ausgangspunkt der folgenden Beiträge ist die Arbeit „Coaching in der zweiten Romantik: Abstieg oder Aufstieg?“ von Böning und Strikker. Drei Autor/innen nehmen Stellung zu den Fragen: Welchen Einfluss kann Coaching auf den gesellschaftlichen und politischen Diskurs nehmen, um sowohl gesamtgesellschaftliche als auch politische Handlungsnotwendigkeiten aufzugreifen und dazu Stellung zu nehmen? Wie gestaltet Coaching organisationsbezogen kulturelle und politische Verhältnisse mit, wie sie die Autoren unter anderem in ...
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Mit Sicherheit zu etwas Neuem: Zur Bedeutung psychologischer Sicherheit in der Post-Merger-Integration (PMI)
(2021-08-03)
Zahlreiche Unternehmensfusionen in Deutschland scheitern oder bleiben weit hinter den Erwartungen zurück. Besondere Bedeutung für das Gelingen von Fusionen hat die Gestaltung der Post-Merger-Integration, also die Phase des Zusammenführens der beiden vormals selbstständigen Unternehmen. Das von Amy C. Edmondson entwickelte Konzept der psychologischen Sicherheit könnte hierfür eine wichtige Funktion zur Orientierung und Handlungsleitung erhalten. Die erste Auswertung von Ergebnissen einer qualitativen Befragung von ...
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Demut gegenüber der Fehlbarkeit des Handelns im Business-Coaching (Humility in the face of the fallibility of action in business coaching)
(2021-08-04)
Rezension zu Heidi Möller, Jannik Zimmermann (2020): Schwierige Situationen im Business-Coaching. Praxisbeispiele, Perspektiven und Handlungsmöglichkeiten. Wiesbaden: Springer, 206 Seiten, 39,99 €.
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Toward optimal probabilistic active learning using a Bayesian approach
(2021-05-04)
Gathering labeled data to train well-performing machine learning models is one of the critical challenges in many applications. Active learning aims at reducing the labeling costs by an efficient and effective allocation of costly labeling resources. In this article, we propose a decision-theoretic selection strategy that (1) directly optimizes the gain in misclassification error, and (2) uses a Bayesian approach by introducing a conjugate prior distribution to determine the class posterior to deal with uncertainties. ...
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Urban and Rural Sustainability: Divergent Concepts and Their Consequences for Marketing
(2021-07-02)
Most sustainability innovations are adapted to the needs of urban areas. These innovations are either not offered at all in rural areas (e.g., car sharing) or require massive effort and restrictions to be usable or effective (e.g., ride sharing). Delving deeper than the description scholarly research needs to clarify consumers' conceptualization of sustainability in urban and rural areas. Notably, the extent to which sustainable innovations are adopted and their associated adoption dynamics with the consequences for ...
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The organic mindset: insights from a mixed methods grounded theory (MM-GT) study into organic food systems
(2021-04-23)
A broad understanding of food systems includes a complex web of activities, outcomes and drivers, encompassing not only the food and agriculture sectors, but also the social norms and cultures in which those activities are embedded. The organic food and farming movement has lately been portrayed as a food system of its own right, since it contains all necessary sub-systems, consisting of food environments, distribution networks, processing, as well as production and supply, all of which are bounded by an organic ...
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Rigorous 3D modeling of confocal microscopy on 2D surface topographies
(2021-06-07)
Although optical 3D topography measurement instruments are widespread, measured profiles suffer from systematic deviations occurring due to the wave characteristics of light. These deviations can be analyzed by numerical simulations. We present a 3D modeling of the image formation of confocal microscopes. For this, the light-surface interaction is simulated using two different rigorous methods, the finite element method and the rigorous coupled-wave analysis. The image formation in the confocal microscope is simulated ...