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Diversity performance of multiband antennas for compact mobile terminals

Spatial diversity is a popular multiple antenna system technique, due to simplicity in implementation. However, its application has thus far been limited to systems where the electrical separation between adjacent antennas typically exceeds half a wavelength. This is because a more compact design induces higher antenna correlation and impedance mismatch, which results in lower diversity gains. In

Operational Experience of Load Shedding and new Operational Requirements on Frequency Relays

This paper summarises experience and analysis of under-frequency load shedding and power generator islanding. Most power systems can withstand the loss of a single generating unit or a single transmission line. Simultaneous loss of several power system components may cause a severe deficit in active and reactive power. The action of overexcitation limiters on the remaining generators may further a

Real and virtual photon structure

The structure of real and virtual photons has been studied in electron-proton scattering processes producing di-jet events at HERA by the H1 and ZEUS collaborations. Data have been compared to next-to-leading order QCD calculations and to the predictions of Monte Carlo generators based on the DGLAP and CCFM formalisms for describing the parton dynamics.

Computer supported visualization of ergonomic guidelines

This study attempts to discover how ergonomic guidelines should be visualized in order to make it easier and more interesting to find and interpret the guidelines throughout the construction process. A prototype visualizing ergonomic guidelines at the intranet has been developed and evaluated at a company that produces cars for the global market. The results shows that the visualization of ergonom

Naturalism, Truthmaker Internalism and Representational Content

The paper is an attempt to bring doubt to the claim that truthmaking is an internal relation holding between a truthmaker and bearer of truth. Depending on whether an internal relation is taken to be necessitated by the existence of its terms or supervenient on the intrinsic properties of its relata, truthmaker internalism involves commitment to one of two views: either truthbearers have their con