in this paper, two inverse problems of stephen kind with local (dirichlet) boundary conditions are investigated. in the first problem only a part of boundary is unknown and in the second problem, the whole of boundary is unknown. for the both of problems, at first, analytic expressions for unknown boundary are presented, then by using these analytic expressions for unknown boundaries and bounda...

In this paper we describe and analyze some modified boundary element methods to solve exterior boundary value problems for the Helmholtz equation with either Dirichlet or Neumann boundary conditions. The proposed approach avoids spurious modes even in the case of Lipschitz boundaries. Moreover, the regularisation is done based on boundary integral operators which are already available in standa...

An analytic solution is presented describing ̄ow to a drain in a semi-in®nite domain bounded by a leaky layer of constant thickness. The solution is developed by applying the method of images to two parallel boundaries: an inhomogeneity boundary and an equipotential boundary. It is then demonstrated that the solution for the problem with the leaky layer approximated by a leaky boundary (a mixed...

Researchers studying on adaptation and resilience of systems mainly seek to reduce the vulnerability of extremely complex social-ecological systems against potential changes. Since major portion of natural resources of Iran is interrelated with various users and social groups. Present study focused upon the necessity of studying structural characteristics of social capital of rangeland users in...

The environment of small and medium-sized enterprises (SMEs) in Germany is characterized by constantly changing boundary conditions. To cope with these external influences, these enterprises have to adapt their internal organization structures and processes permanently. However, necessary changes often cannot be realized due to the rigidity of today’s order management information systems (OMS)....

Defense-In-Depth [1] concepts for global information operations are physical boundary-centric. However, networkcentric operations are multidimensional, layered and often virtual. The interconnection of defensive operational elements, including the fixed and deployed base, runways, fighter planes, bombers, bombs, tankers, tents and individuals are logically and virtually connected. For this reas...

The natural disturbances paradigm in forestry management emphasizes understanding and emulating natural variation in forest ecosystems processes and patterns. Using dendrochronological data in two study areas in the Stein River valley, British Columbia, we provide empirical models of the spatial-temporal variation in boundaries of low-severity fires. With geographic information systems, databas...

Management of mobility especially balancing the load of handoff for wireless networks is an essential parameter for wireless network design and traffic study. In this paper, we present analytical mobility management in high speed wireless mobile networks focusing on factors such as the number of channel slots and offered load. We demonstrate the performance of handoffs with mobility considerati...