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Influence of Copper-Sided Tin Coating on the Weldability and Formation of Friction Stir Welded Aluminum-Copper-Joints
(2019-02-02)
Although the joining of aluminum and copper is a difficult task, several studies have shown that friction stir welding (FSW) is capable of producing aluminum-copper-joints with excellent performance. Therefore, it is desirable to use this joining technique for the production of cost- and weight-reduced conductors for the automotive sector. The exposed copper contact spots in automobiles are usually coated with tin for design reasons and in order to improve their corrosion resistance. In this context, it is possible ...
Aufsatz
Problematische Ablehnungskonstruktionen
(2020-02-14)
Der Beitrag diskutiert rechtspopulistische, menschenfeindliche Rhetoriken zu Fragen von Sozialstaat und Erziehung kritisch. Anlass ist die Wahrnehmung, dass entspreche Sprachspiele zunehmend auch in der Praxis der Sozialen Arbeit artikuliert werden, ohne dass sie als solche identifiziert und kritisiert würden.
Rechte, nationale, xenophobische, antisemitische, rassistische, homophobe und andere Positionen aus dem Spektrum der gruppenbezogenen Menschenfeindlichkeit zu erkennen, fällt zunehmend schwerer. Zuweilen ...
Aufsatz
Normative and cognitive influences on female entrepreneurial reluctance at the base of the pyramid - an explorative study of cleaning ladies in Istanbul
(COMSATS, Inst. of Information Technology, 2013)
Previous research has considered entrepreneurship as a way out of poverty and as a chance to foster economic growth. Moreover, specifically start-ups headed by women have played an important role in the economic development and it has been argued that gender-related issues, amongst others, play a significant role for the performance of a country or region. Against this background, this qualitative study explores desires, reluctances and constraints toward entrepreneurial activities of a comparably homogenous group ...
Aufsatz
Applying Least Absolute Shrinkage Selection Operator and Akaike Information Criterion Analysis to Find the Best Multiple Linear Regression Models between Climate Indices and Components of Cow’s Milk
(MDPI, 2016-07-23)
This study focuses on multiple linear regression models relating six climate indices (temperature humidity THI, environmental stress ESI, equivalent temperature index ETI, heat load HLI, modified HLI (HLI new), and respiratory rate predictor RRP) with three main components of cow’s milk (yield, fat, and protein) for cows in Iran. The least absolute shrinkage selection operator (LASSO) and the Akaike information criterion (AIC) techniques are applied to select the best model for milk predictands with the smallest ...
Aufsatz
Happy growers! Relationship quality in the German organic apple chain
(IFAMA, 2014)
Relational factors between supply chain actors have been acknowledged to contribute significantly to competitiveness. With the example of the German market for organic apples the suitability of the concept of the Relational View for explaining competitiveness was investigated. Structured interviews were conducted with selected actors of the supply chain. Actors at all levels of the supply chain proved to be highly committed and described their business relations as satisfying and trustful. Strong vertical and horizontal ...
Aufsatz
Giving Is Nicer than Taking: Preschoolers Reciprocate Based on the Social Intentions of the Distributor
(2016-01-25)
Recent research has found that even preschoolers give more resources to others who have previously given resources to them, but the psychological bases of this reciprocity are unknown. In our study, a puppet distributed resources between herself and a child by taking some from a pile in front of the child or else by giving some from a pile in front of herself. Although the resulting distributions were identical, three- and five-year-olds reciprocated less generously when the puppet had taken rather than given resources. ...
Aufsatz
The explanatory power of silent comics: An assessment in the context of knowledge transfer and agricultural extension to rural communities in southwestern Madagascar
(2019-06-06)
The distribution of silent comic illustrations can facilitate the communication and transfer of scientific recommendations about sustainable land management (SLM) to local communities in countries where many people are illiterate. However, since there are cross-cultural differences in “visual languages”, visualization styles need to be carefully selected as well as locals’ comprehension of the illustrated recommendation evaluated systematically. Three agricultural recommendations were chosen for comic-style illustrations, ...
Aufsatz
Doppelspitzen: Notlösung, Heilsbringer oder innovatives Führungsmodell? Coaching für gelingende Führungstandems
(2021-03-25)
Doppelspitzen werden in der aktuellen Führungsdebatte kontrovers diskutiert. Wissenschaftliche Erkenntnisse zur Arbeit von Führungstandems sind rar. Bisherige Coachingkonzepte befassen sich schwerpunktmäßig mit dem Konfliktcoaching von Doppelspitzen. In dem vorliegenden Beitrag wird den Fragen nachgegangen, welche Gelingensfaktoren und Herausforderungen es bei geteilter Leitung gibt und wie die Potenziale von Führungstandems durch (präventives) Coaching gehoben werden können.
Aufsatz
A Logic Based Approach to Finding Real Singularities of Implicit Ordinary Differential Equations
(2020-06-17)
We discuss the effective computation of geometric singularities of implicit ordinary differential equations over the real numbers using methods from logic. Via the Vessiot theory of differential equations, geometric singularities can be characterised as points where the behaviour of a certain linear system of equations changes. These points can be discovered using a specifically adapted parametric generalisation of Gaussian elimination combined with heuristic simplification techniques and real quantifier elimination ...
Aufsatz
Evidence for cell turnover as the mechanism responsible for the transport of embryos towards the vagina in viviparous onychophorans (velvet worms)
(2019-06-07)
Background
Onychophorans, commonly known as velvet worms, display a remarkable diversity of reproductive strategies including oviparity, and placentotrophic, lecithotrophic, matrotrophic or combined lecithotrophic/matrotrophic viviparity. In the placentotrophic species, the embryos of consecutive developmental stages are attached to the uterus via a placental stalk, suggesting they might be transported passively towards the vagina due to proximal growth and distal degeneration of tissue. However, this assumption has ...