Factors influencing egg laying behaviour and triggering ovulation in desert Tenebrionidae (Coleoptera: Insecta)

Über das Eiablage Verhalten und die Faktoren, welche die Eiablage begünstigen, ist bei den meisten der fast 20000 Tenebrioniden nichts bekannt. Lediglich bei einigen wirtschaftlich wichtigen Arten gibt es dazu Untersuchungen (JAKOBS & RENNER 1988). Als eine der wasserärmsten Wüsten der Welt ist die Namib reich an endemischen Coleopteren – insbesondere 320 Tenebrionidaearten (HOLM & DE MEILLON 1996). Langzeituntersuchungen an Tenebrioniden (HENSCHEL 1994, HENSCHEL et al. 1998) legen die Vermutung nahe, dass Schwankungen der Populationen auf unterschiedliche Reproduktionsstrategien zurückzuführen sind. Klimatische Ereignisse, die der Namib Feuchtigkeit zuführen, sind für Entwicklung und Reproduktion besonders beachtenswert (NICOLSON 1990).Ten species of Tenebrionidae (Coleoptera: Insecta) existing sympatrically in the Kuiseb valley and adjacent habitats within the Namib desert (Namibia) were studied with regard to their egg laying and reproduction strategies. Epiphysa arenicola, Onymacris rugatipennis, Physadesmia globosa and Stenocara gracilipes (Adesmiini), as well as Gonopus tibialis (Platynotini), Rhammatodes subcostatus (Tentyriini), Lepidochora discoidalis, Stips stali (Eurychorini) and Zophosis devexa, Zophosis orbicularis (Zophosini) differ to their strategies concerning reproduction. They lay their eggs in six different fundamental niches characterized by three particular types of substrate and five levels of soil moisture. Different factors were found to be responsible for triggering ovulation in desert Tenebrionids. Thus the significant reproductive benefits were linked to ephemeral flood, summer rain of 10 mm or 20 mm, winter rain of 10 mm or 20 mm, fog, or a combination of different moisture inputs. Season proved to be important, too

Glyphs for space-time Jacobians of time-dependent vector fields

Glyphs have proven to be a powerful visualization technique for general tensor fields modeling physical phenomena such as diffusion or the derivative of flow fields. Most glyph constructions, however, do not provide a way of considering the temporal derivative, which is generally nonzero in non-stationary vector fields. This derivative offers a deeper understanding of features in time-dependent vector fields. We introduce an extension to 2D and 3D tensor glyph design that additionally encodes the temporal information of velocities, and thus makes it possible to represent time-dependent Jacobians. At the same time, a certain set of requirements for general tensor glyphs is fulfilled, such that the new method provides a visualization of the steadiness or unsteadiness of a vector field at a given instance of time

New Techniques for the Modeling, Processing and Visualization of Surfaces and Volumes

With the advent of powerful 3D acquisition technology, there is a growing demand for the modeling, processing, and visualization of surfaces and volumes. The proposed methods must be efficient and robust, and they must be able to extract the essential structure of the data and to easily and quickly convey the most significant information to a human observer. Independent of the specific nature of the data, the following fundamental problems can be identified: shape reconstruction from discrete samples, data analysis, and data compression. This thesis presents several novel solutions to these problems for surfaces (Part I) and volumes (Part II). For surfaces, we adopt the well-known triangle mesh representation and develop new algorithms for discrete curvature estimation,detection of feature lines, and line-art rendering (Chapter 3), for connectivity encoding (Chapter 4), and for topology preserving compression of 2D vector fields (Chapter 5). For volumes, that are often given as discrete samples, we base our approach for reconstruction and visualization on the use of new trivariate spline spaces on a certain tetrahedral partition. We study the properties of the new spline spaces (Chapter 7) and present efficient algorithms for reconstruction and visualization by iso-surface rendering for both, regularly (Chapter 8) and irregularly (Chapter 9) distributed data samples

The dimension of C1C^1 splines of arbitrary degree on a tetrahedral partition

We consider the linear space of piecewise polynomials in three variables which are globally smooth, i.e., trivariate $C^1$ splines. The splines are defined on a uniform tetrahedral partition $\Delta$, which is a natural generalization of the four-directional mesh. By using Bernstein-B{\´e}zier techniques, we establish formulae for the dimension of the $C^1$ splines of arbitrary degree

Convergence of the Czech Republic to the EU-15 countries

Real and nominal convergence is an actual topic in majority of "new" member states of European union, especially, before entering EMU. This paper is dealing with convergence of the Czech Republic to the EU-15 countries and compares the level of convergence of our economy with some specific "new" members of EU. Work is devided into three main sections. First section is adressed to the definition of economic convergence as it is defined in standard economic literature. Second section deals with process of real convergence and its index on example of the Czech Republic including comparision with the selected countries of EU. Third section is devoted to the nominal convergence. The case of nominal convergence is also compared with the selected countries of EU and evaluation of fulfilment of maastricht convergence criterias by Czech Republic is carried out. Aim of this work is to provide complex view on the convergence of the Czech Republic to the "old" European union countries

Rationalization of cutting floating wheels pumps with usage of CNC machine tools

Import 19/12/2006Prezenční346 - Katedra obrábění a montáž

La scrittura del visibile

Session 215: DISTAFF, II: French DressingInternational audienceThe first paper examines the context, form, function, and prestige of the mantle in French Romance literature. The second focusses on medieval French cross-dressing literature with emphasis on the literature’s interaction with canon law and visual depictions of cross-dressing in manuscript miniatures. Finally, a sculpture in the Musée Lorrain, Nancy, known as ‘Le Retour du Croisé’, is usually interpreted as a lady greeting her husband on his return from the 2nd Crusade, but close examination of her dress suggests that she, too, travelled to the Holy Land

Complex Projects and Transition-Driven Evaluation: The Case of the easyRights European Project

More and more, the evaluation of complex projects is being related to the capacity of the project to deal with crucial social, economic, and environmental issues that society is respon-sible for and with the activation of systemic changes. Within this “mission” perspective, growing attention is given to learning in action. This paper aims at (i) conceptualizing a methodological framework for complex project evaluation within the context of the Triple-Loop Learning mechanism and (ii) showing its application in a European project as well as including the toolbox developed in coherence with the elaborated framework. It does so by looking at the case of an ongoing Horizon 2020 project aiming to develop language-oriented technologies supporting the inclusion of migrants in Europe. In particular, the paper looks at Triple-Loop Learning as pushed by the reflection on three dimensions: the “what”, the “how”, and the “why” of collective actions in complex projects. The consequent learning process is expected to have transformational potentials at the individual, institutional/organizational, and (in the long term) up to the societal scale. By exploring the opportunities offered by the evaluation tools in the easyRights project, the study highlights the potential of nurturing a wider, arguably neglected as yet, learning space for understanding, engaging, and transforming real contexts and thus developing more effective contribution to the needed transition