The strengths of the RF signals arriving from more access points in a wireless LANs are related to the position of the mobile terminal and can be used to derive the location of the user. In a heterogeneous environment, e.g. inside a building or in a variegated urban geometry, the received power is a very complex function of the distance, the geometry, the materials. The complexity of the invers...

The location of the mobile user is fundamental to all location-based services. To enable these services the mobile middleware platform needs to access the user’s location. Today a number of vendors like Ericsson and Nokia can provide mobile positioning services (MPS) that can be used to locate the user’s mobile device. Push services, triggered by the user’s location, also put heavy demands on t...

Determining the diffusion coefficient based on the solution of the linear inverse problem of the parameter estimation by using the Least-square method is presented. A set of temperature measurements at a single sensor location inside the heat conducting body is required. The corresponding direct problem will be solved by an application of the heat fundamental solution.

The goals of hub location problems are finding the location of hub facilities and determining the allocation of non-hub nodes to these located hubs. In this work, we discuss the multi-modal single allocation capacitated p-hub covering problem over fully interconnected hub networks. Therefore, we provide a formulation to this end. The purpose of our model is to find the location of hubs and the ...

Many mobile applications require some knowledge about the current geographic locations of the mobile objects involved. Therefore, services exist that can store and retrieve the position of mobile objects in an efficient and scalable way. More advanced location-aware applications, however, require additional functionality, like determining all mobile objects inside a certain geographic area (ran...

The relationship between the TCR repertoires of natural regulatory T cells (nTregs) and conventional CD4(+) T cells (Tconv) capable of responding to the same antigenic epitope is unknown. In this study, we used TCRβ-chain transgenic mice to generate polyclonal nTreg and Tconv populations specific for a foreign Ag. CD4(+) T cells from immunized 3.L2β(+/-) TCRα(+/-) Foxp3(EGFP) mice were restimul...