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Micro mobility and internet access performance for TCP connections in Ad Hoc networks

In ad hoc mobile networks nodes typically communicate over wireless channels and are capable of movement. These are networks that support multihop communication and can be formed on a temporary basis. This paper evaluates a solution that allows mobile nodes to access the wired Internet and roam from base station to base station. The solution is based on the extension of Mobile IP capabilities to t

Refractometry of microscopic objects using digital holography

Digital holography has some desirable properties for refractometry of microscopic objects since it gives phase and amplitude information of an object in all depths of focus from one set of exposures. The refractive index of the object can be determined by observation of the movements of the Becke lines between different focus depths. It is also shown that one single phase image provides an independ

Strategic communication: An introduction

Strategic communication comprises different forms of goal-oriented communication inside and between organizations, their stakeholders and the society. Strategic communication is an emerging practice and research field integrating established disciplines such as public relations, organizational communication and marketing communication into a holistic framework. The field is based on an awareness o

National champions

The intervention presents President Sarkozy’s controversial statements in relation to the elimination of Article 3(1)(g) in the TEC and discusses potential future consequences in line with the Swedish article (2009:1) Efter 50 år – mindre principer och mer politik i konkurrensrätten.

Detection of charge states in nanowire quantum dots using a quantum point contact

The authors demonstrate operation of a charge readout scheme for quantum dots in a semiconductor nanowire using a quantum point contact defined in a GaAs/AlGaAs two-dimensional electron gas beneath the nanowire. The quantum dots were fabricated by epitaxial growth of InP barriers along a n-type InAs nanowire. Applying negative voltages to two split-gate electrodes aligned to the nanowire induces a

Scalable Distributed Kalman Filtering for Mass-Spring Systems

This paper considers Kalman Filtering for massspring systems. The aim is a scalable distributed implementation where nodes communicate in a sparse pattern and the state estimate for each node is available locally and usable for control. The focus is on translation invariant systems, to make use of the powerful results available based on Fourier Transform methods. In this case it is known that Kalm

Modelling of Granular Materials

The aim of this doctoral study is to develop and implement a material model for granular materials. The course of this work was concentrated upon a non-associated plasticity model with yield surface and the flow potential expressed in terms of the mean stress p and the third stress invariants I3. The plastic work hardening in the model depends upon both plastic volumetric and deviatoric strain inc