This paper describes two developments in the automatic reconstruction of buildings from aerial images. The first is an algorithm for automatically matching line segments over multiple images. The algorithm employs geometric constraints based on the multi-view geometry together with photometric constraints derived from the line neighbourhood, and achieves a performance of better than 95% correct...

Research into III-Nitride based avalanche photodiodes (APDs) is motivated by the need for high sensitivity ultraviolet (UV) detectors in numerous civilian and military applications. By designing III-Nitride photodetectors that utilize low-noise impact ionization high internal gain can be realized—GaN APDs operating in Geiger mode can achieve gains exceeding 1×10. Thus with careful design, it be...

Cross sections for single electron-impact ionization of formic acid (HCOOH) and acetic acid (CH3–COOH) are calculated using the binaryencounter-Bethe model in the energy range from the ionization threshold up to 4000 eV. The present results are compared with available experimental and theoretical data.

OBJECTIVE Vitiligo is a chronic skin disease that causes loss of pigment, resulting in irregular pale patches of skin. The disease has profound psychological consequences. These effects range from mild embarrassment to a severe loss of self-confidence and social anxiety, especially for those who have lesions on exposed skin. The study sought to determine the psychological impact of vitiligo in ...

We have performed extensive close-coupling calculations to obtain total impact ionization cross sections of He atoms by antiprotons at energies from 1 keV to 300 keV by expanding the time-dependent two-electron wave functions in terms of helium eigenstates. The stability of the calculated ionization probabilities and total ionization cross sections with respect to the choice of basis functions ...

Methods and problems in the field of modern MOS-modeling are reviewed. Models for surface scattering and impact ionization, physical parameters which are of particular relevance for MOS-Transistor simulation programs, are explained. The various conceptional approaches for the numerical solution of the classical semiconductor equations are compared. An example of application of a simulation prog...

OBJECTIVES To inform researchers and clinicians about the most appropriate generic and disease specific measures of health related quality of life for use among people with ischaemic heart disease. METHODS MEDLINE and BIDS were searched for research papers which contained a report of at least one of the three most common generic instruments or at least one of the five disease specific instrum...

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document describes a Uniform Resource Name (URN) namespace that is engineered by a consortium (general contractor, Olimps LTD, and subcontractors, ABC software LTD, Microsoft Latvia LTD, Riga Internet eXchange (RIX) Technologies L...