Learn More
Conductive-radiative heat transfer in a scattering and absorbing medium bounded by two reflecting and radiating plane surfaces is examined. P 1 approximation (diffusion model) is used for the simplification of the original problem. The existence and uniqueness of solutions of the diffusion model are proved. The convergence of an iterative procedure of(More)
In dieser Arbeit untersuchen wir die Bewegung einer Fest-kugel im beschränkten Gebiet, das mit einer inkompressiblen zähen Flüssigkeit gefüllt ist. Wir beweisen, dass die Festkugel die Wand des Behälters mit der Geschwindigkeit Null erreicht. Als eine Folgerung wird die Lösbarkeit der Aufgabe gezeigt. 1 Einführung und Hauptergebnisse. Es sei Ω ein Gebiet im(More)
The paper studies the interaction of a periodic solid bristle structure with a fluid. Such problems arise, for example, when modelling biotechnological devices operating in liquids or when simulating epithelium surfaces of blood vessels. The fluid is described by the linearized Navier– Stokes equation whereas the solid part is governed by equations of(More)
A one-dimensional model is derived in order to study how the elasticity (internal elastic energy) of visco-elastic and elasto-plastic materials, such as biopolymers (muscles and grain our dough) or metals, changes due to the action of external forces. For such materials, the model takes the form of an initial-boundary value problem, corresponding to(More)
A large number of studies deals with the association of cholesterol and Abeta levels, however, the results are so far controversial. Whereas some studies report on increased cholesterol levels, other authors refer to an association of decreased peripheral cholesterol and the incidence of Alzheimer's disease. It is also questionable whether plasma(More)
Finite-difference schemes for the computation of value functions of nonlinear differential games with non-terminal payoff functional and state constraints are proposed. The solution method is based on the fact that the value function is a generalized viscosity solution of the corresponding Hamilton-Jacobi-Bellman-Isaacs equation. Such a viscosity solution(More)
This study applies dynamic programming and numerical methods to an enlarged version of Stoleru's economic model of Algeria to achieve optimization with respect to the criteria of full employment and balanced growth afterwards while maintaining a minimum per capita consumption. The model is expanded with new influential quantities including a state(More)