324 research outputs found
Die Funktion des Wirtschafts- und Sozialausschusses als demokratisches Element in der EG: zur verfassungsrechtlichen Problematik der Beteiligung von Interessenvertretern an der europäischen Rechtsetzung
No full textWiegner Y-M. Die Funktion des Wirtschafts- und Sozialausschusses als demokratisches Element in der EG: zur verfassungsrechtlichen Problematik der Beteiligung von Interessenvertretern an der europäischen Rechtsetzung. Bielefeld; 2004
Eine treue Liebhaberin Jesu, Welche In der Liebe Christi zu sterben Verlanget, und auch würcklich in solcher gestorben ist : Wolte An dem höchsterbaulichen Exempel Der ... Johannen Charlotten von Gerßdorff, aus dem Hause Wigandsthal und Meffersdorff, Welche am 2. Febr. 1729. seelig verschiedenm Und darauf mit Christ-Adelicher Ceremonien ... beerdiget wurde, Aus Dero selbst erwehlten zweyen Leichen-Texten Pd. XVI. v. 5. 6. und I Pet. I. v. 3 - 9. ... aufrichten Dero unwürdig gewesener Beicht-Vater M. Abraham Wiegner, Ober-Pfarrer in Wigandsthal und Meffersdorff
No full textFour-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET
No full textThe eruption of the Icelandic volcano Eyjafjallajökull in April–May 2010 represents a "natural experiment" to study the impact of volcanic emissions on a continental scale. For the first time, quantitative data about the presence, altitude, and layering of the volcanic cloud, in conjunction with optical information, are available for most parts of Europe derived from the observations by the European Aerosol Research Lidar NETwork (EARLINET). Based on multi-wavelength Raman lidar systems, EARLINET is the only instrument worldwide that is able to provide dense time series of high-quality optical data to be used for aerosol typing and for the retrieval of particle microphysical properties as a function of altitude. In this work we show the four-dimensional (4-D) distribution of the Eyjafjallajökull volcanic cloud in the troposphere over Europe as observed by EARLINET during the entire volcanic event (15 April–26 May 2010). All optical properties directly measured (backscatter, extinction, and particle linear depolarization ratio) are stored in the EARLINET database available at http://www.earlinet.org. A specific relational database providing the volcanic mask over Europe, realized ad hoc for this specific event, has been developed and is available on request at http://www.earlinet.org. During the first days after the eruption, volcanic particles were detected over Central Europe within a wide range of altitudes, from the upper troposphere down to the local planetary boundary layer (PBL). After 19 April 2010, volcanic particles were detected over southern and south-eastern Europe. During the first half of May (5–15 May), material emitted by the Eyjafjallajökull volcano was detected over Spain and Portugal and then over the Mediterranean and the Balkans. The last observations of the event were recorded until 25 May in Central Europe and in the Eastern Mediterranean area. The 4-D distribution of volcanic aerosol layering and optical properties on European scale reported here provides an unprecedented data set for evaluating satellite data and aerosol dispersion models for this kind of volcanic events
On upper bounds for waiting times for doubly nonlinear parabolic equations
No full textIt is the aim of this thesis to derive quantitative upper bounds for waiting time phenomena. Herein the waiting time of a nonnegative function u: R^n x [0, infty) -> [0, infty) denotes the time when u starts leaving the initial support supp(u(.,0)) for the first time. We will examine how the waiting time of nonnegative solutions for degenerated diffusion equations depends on the growth of the initial value. The situation of the porous medium equation is fully understood thanks to the works of Aronson, Alikakos, Caffarelli, Chipot, Kamin, Sideris (1983-1985). Although lower bounds, e. g. by Giacomelli, Grün (2006), are also known for further classes of equations, for example the doubly degenerate parabolic differential equation , nothing was known about quantitative upper bounds in this more general setting. An upper bound will be derived for this situation in the first chapter. This will be done (roughly sketched) in the following steps: * Existence of weak solutions which preserve radial symmetry, sign of the radial derivative and comparability of initial values (Theorem 1.1.3),* derivation of a superlinear ordinary differential equation for an energy functional of a specific nonlinear solution (proof of Theorem 1.4.2),* analysis of the blow-up time for differential inequalities of this type (Lemma 1.4.1).Those energy functionals can be used in order to derive upper bounds in the more general situation , i. e. with reaction terms resp. absorption terms. It will be shown that the value of alpha (depending on p, m) is essential for the property whether this additional term can be neglected or whether it has significant influence on the waiting time, see the second chapter. Eventually one has to switch to an indirect argument together with a functional inequality (instead of a differential inequality). This chapter ends with a discussion for the variant with convection terms resp. advection terms. Finally it will be shown in the third chapter (Theorem 3.1) that these energy methods also work for the coupled system . Parts of the first chapter were already published in the following article: * Djie, Kianhwa Colin, An upper bound for the waiting time for doubly nonlinear parabolic equations, Interfaces and Free Boundaries, 9 No. 1, 2007, 95-105
Decay estimates for strong solutions of the Navier-Stokes equations in exterior domains
No full textLet Ω ⊂ IRn, n ≥ 3, denote an exterior domain. We are interested in strong solutions of the Navier-Stokes equations ut −△u+ (u∇)u+∇p = 0 div u =
On upper bounds for waiting times for doubly nonlinear parabolic equations
No full textIt is the aim of this thesis to derive quantitative upper bounds for waiting time phenomena. Herein the waiting time of a nonnegative function u: R^n x [0, infty) -> [0, infty) denotes the time when u starts leaving the initial support supp(u(.,0)) for the first time. We will examine how the waiting time of nonnegative solutions for degenerated diffusion equations depends on the growth of the initial value. The situation of the porous medium equation is fully understood thanks to the works of Aronson, Alikakos, Caffarelli, Chipot, Kamin, Sideris (1983-1985). Although lower bounds, e. g. by Giacomelli, Grün (2006), are also known for further classes of equations, for example the doubly degenerate parabolic differential equation , nothing was known about quantitative upper bounds in this more general setting. An upper bound will be derived for this situation in the first chapter. This will be done (roughly sketched) in the following steps: * Existence of weak solutions which preserve radial symmetry, sign of the radial derivative and comparability of initial values (Theorem 1.1.3),* derivation of a superlinear ordinary differential equation for an energy functional of a specific nonlinear solution (proof of Theorem 1.4.2),* analysis of the blow-up time for differential inequalities of this type (Lemma 1.4.1).Those energy functionals can be used in order to derive upper bounds in the more general situation , i. e. with reaction terms resp. absorption terms. It will be shown that the value of alpha (depending on p, m) is essential for the property whether this additional term can be neglected or whether it has significant influence on the waiting time, see the second chapter. Eventually one has to switch to an indirect argument together with a functional inequality (instead of a differential inequality). This chapter ends with a discussion for the variant with convection terms resp. advection terms. Finally it will be shown in the third chapter (Theorem 3.1) that these energy methods also work for the coupled system . Parts of the first chapter were already published in the following article: * Djie, Kianhwa Colin, An upper bound for the waiting time for doubly nonlinear parabolic equations, Interfaces and Free Boundaries, 9 No. 1, 2007, 95-105
Decaimento assintótico de escoamentos viscosos incompressíveis
No full textNeste trabalho, vamos apresentar uma prova elementar de um resultado obtido originalmente por M. Wiegner em 1986 sobre o decaimento na norma L2 de soluções das equações de Navier-Stokes incompressíveis em dimensão 2 ou 3, desenvolvendo em detalhe uma derivação alternativa proposta por T. Hagstrom, H. Kreiss, J. Lorenz e P. Zingano recentemente em 2002.In this work, we will present an elementary derivation of an important result originally obtained by M. Wiegner in 1986 concerning the L2 decay of solutions to the incompressible Navier-Stokes equations in space dimension 2 or 3. Here, we give a detailed derivation of an alternative approach recently developed by T. Hagstrom, H. Kreiss, J. Lorenz and P. Zingano in 2002
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