Search
Now showing items 141-150 of 2193
Dissertation
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
Power Series Representations of Hypergeometric Type and Non-Holonomic Functions in Computer Algebra
(2020-06-10)
A Laurent-Puiseux series
$$ \sum\limits_{n = n_0}^{\infty }{a_n (z - z_0)^{n/k} (a_n \in K, k \in ℕ, n_0 \in ℤ ) } \quad (1) $$
where $ k $ denotes the corresponding Puiseux number and $ K $ an infinite computable field - mostly $ K= ℚ(α_1,\ldots,α_n) $ : a field of rational functions in several variables, is mainly characterized by the general coefficient. We consider the case where an is a term of an m-fold hypergeometric sequence.
That is $ a_{n+m} = r(n) a_n $ for all sufficiently large integers $ n, r(n) $ ...
Aufsatz
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
Adoption and utilisation of Zai pits for improved farm productivity in drier upper Eastern Kenya
(2020-03-06)
Inadequate and poorly distributed rainfall and declining soil fertility have led to low crop productivity in most smallholder farms in sub-Saharan Africa. As a result, there has been a renewed quest for sustainable and resource-use efficient agricultural production practices. Zai pit technology is a practice that has the potential to alleviate water stress and enhance soil fertility. We assessed the factors that influence farmers' adoption and utilisation of Zai pits in Tharaka-Nithi County in upper Eastern Kenya. ...
Aufsatz
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
How do management practices and farm structure impact productive performances of dairy cattle in the province of Pichincha, Ecuador
(2020-11-11)
The combination of "ancestral knowledge" and modern agricultural techniques are increasingly used by Andes farmers, demonstrating its great importance as an ideal alternative to achieve international standards of productivity and sustainability. Pasture management has demonstrated its relevance in terms of milk volume and quality in farms located in the Ecuadorian highlands, showing a wide range of types of forage resource use, in its constant search for better animal yields from the occupancy rate. However, while ...
Aufsatz
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
Sensor Concept Based on Piezoelectric PVDF Films for the Structural Health Monitoring of Fatigue Crack Growth
(2011)
A new sensor concept for monitoring fatigue crack growth in technical structures is presented. It allows the in-situ determination of the position of the crack tip as well as the fracture mechanical quantities. The required data are obtained from a piezoelectric polymer film, which is attached to the surface of the monitored structure. The stress intensity factors and the crack tip position are calculated from electrical potentials obtained from a sensor array by solving the non-linear inverse problem.
Konferenzveröffentlichung
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
Linking entrepreneurial orientation to firm performance in a post-socialist market context: the case of Hungary
(National University of Political Studies and Public Administration (SNSPA), Faculty of ManagementTritonic, 2016)
Entrepreneurial orientation provoked the interest of numerous scholars as well as political and administrative decision-makers. Both start-ups and already established corporate entities are increasingly persecuting new opportunities, products, and business models in order to establish superiority above their competitive environment. The tendencies evince an optimist impact of entrepreneurial orientation on business performance, namely on financial performance. Beyond the aforementioned relationship, there are impulses ...
Aufsatz
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
The Impact of Missing Values on PLS, ML and FIML Model Fit
(2020)
Structural equation modelling has become widespread in the marketing research domain due to the possibility of creating and investigating latent constructs. Today, several estimation methods are available, each with strengths and drawbacks. This study investigates how the established estimation methods of partial-least-squares (PLS), maximum likelihood (ML) and full-information maximum likelihood (FIML) perform with an increasing percentage of missing values (MVs). The research was conducted by investigating an adapted ...
Aufsatz
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
Crack path predictions and experiments in plane structures considering anisotropic properties and material interfaces
(2015-09-28)
In many engineering applications special requirements are directed to a material's fracture behavior and the prediction of crack paths. Especially if the material exhibits anisotropic elastic properties or fracture toughnesses, e.g. in textured or composite materials, the simulation of crack paths is challenging. Here, the
application of path independent interaction integrals (I-integrals), J-, L- and M-integrals is beneficial for an accurate crack tip loading analysis.
Numerical tools for the calculation of loading ...
Aufsatz
Das gute Recht auf Bildung
(2019)
Deutschland hat sich mit der Inkraftsetzung der UN-Behindertenrechtskonvention (BRK) als deutschem Recht ab dem 26. März 2009 unter anderem dazu verpflichtet, ein Bildungssystem zu verwirklichen, an dem Menschen mit Behinderung vollständig und gleichberechtigt teilhaben können. Darin ausdrücklich inbegriffen sind Angebote für Erwachsenenbildung und lebenslanges Lernen. „Die Vertragsstaaten stellen sicher, dass Menschen mit Behinderungen ohne Diskriminierung und gleichberechtigt mit anderen Zugang zu allgemeiner ...
Teil eines Buches
Heimat im Plural
(Lit Verlag, 2011)
Biblische Pluralität kann selbst wieder unter verschiedenen Perspektiven wahrgenommen werden: die theologische Position, das Geschlecht, die sozioökonomische Stellung sind nur einige der relevanten Kategorien, die Vielfalt markieren und auch produzieren. Das Thema Migration berührt die Frage nach der Pluralität biblischer Stimmen und fokussiert diese unter der Kategorie des Raums.
Konferenzveröffentlichung
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
Concept for selecting and integrating traceability systems in the continuous improvement process of SMEs
(2019)
Industry 4.0 is characterized by digitization, globalized markets and a growing demand for individualized products. Therefore, the success of manufacturing companies heavily relies on innovative and customer driven products. However, the industrializing phase of such products is often characterized by the occurring of errors originating in a lack of experience. If errors are not detected prior to delivery, costs will increase considerably (e.g. expensive product recalls). Traceability systems can clearly identify the ...