Visual information seeking on palmtop devices

Ahlberg and Shneiderman's Starfield displays have been shown to provide fast and convenient access to large collections of data. However, the standard design requires a large, high-resolution, colour screen. This paper presents the results of a short project investigating this visual information seeking technique on a monochrome palmtop

The role of the horse in Europe. Editorial

The horse has a unique place in European society. Historically, it has played a major part in shaping political and agricultural advances. Today, the horse has diverse roles ranging from the companion and leisure horse, to the sporting athlete. The horse continues to work on the land in many European countries, it serves in the police and the armed forces, and in some regions is a source of food. This has resulted in a vast range of horse-human interactions and relationships. Despite the long association between man and the horse we still have a great deal to learn about their behaviour and the constraints that domestication has placed on them. The WATHAM Symposium on “The Role of the Horse in Europe”, organized in association with the Anthrozoology Institute at the University of Southampton, brought together researchers involved in the student of equine behaviour management and horsehuman interactions to present some of their recent work and to identify fruitful areas for future research. In addition to the main programme papers, the Symposium also featured a series of poster presentations on a range of topics including the evolution and domestication of horses; their husbandry, behaviour and welfare; and the role of the horse in modern society. The horse industry, and indeed, equine research, appears to be very fragmented by both discipline and country; and European collaboration provides a greater research potential than exists within countries or disciplines. The WALTHAM Symposium was successful, not only in highlighting common areas of interest, but also in revealing gaps in our knowledge where the paucity of information stands a barrier to the advancement of the equine industry, as a whole, across Europe

PHOTOS Interface in C++; Technical and Physics Documentation

For five years now, PHOTOS Monte Carlo for bremsstrahlung in the decay of particles and resonances has been available with an interface to the C++ HepMC event record. The main purpose of the present paper is to document the technical aspects of the PHOTOS Monte Carlo installation and present version use. A multitude of test results and examples are distributed together with the program code. The PHOTOS C++ physics precision is better than its FORTRAN predecessor and more convenient steering options are also available. An algorithm for the event record interface necessary for process dependent photon emission kernel is implemented. It is used in Z and W decays for kernels of complete first order matrix elements of the decays. Additional emission of final state lepton pairs is also available. Physics assumptions used in the program and properties of the solution are reviewed. In particular, it is explained how the second order matrix elements were used in design and validation of the program iteration procedure. Also, it is explained that the phase space parametrization used in the program is exact.Comment: Updated version; for the program as of April 201

A Framework for Designing MIMO systems with Decision Feedback Equalization or Tomlinson-Harashima Precoding

We consider joint transceiver design for general Multiple-Input Multiple-Output communication systems that implement interference (pre-)subtraction, such as those based on Decision Feedback Equalization (DFE) or Tomlinson-Harashima precoding (THP). We develop a unified framework for joint transceiver design by considering design criteria that are expressed as functions of the Mean Square Error (MSE) of the individual data streams. By deriving two inequalities that involve the logarithms of the individual MSEs, we obtain optimal designs for two classes of communication objectives, namely those that are Schur-convex and Schur-concave functions of these logarithms. For Schur-convex objectives, the optimal design results in data streams with equal MSEs. This design simultaneously minimizes the total MSE and maximizes the mutual information for the DFE-based model. For Schur-concave objectives, the optimal DFE design results in linear equalization and the optimal THP design results in linear precoding. The proposed framework embraces a wide range of design objectives and can be regarded as a counterpart of the existing framework of linear transceiver design.Comment: To appear in ICASSP 200