In this paper a method of autonomous space searching is described. The task is to search the given area and to find lost objects (e.g. injured people or bombs) as fast as possible. The given area is a building which is divided into rooms. It is assumed that the lost objects are located in groups and finding one object suggests there are more lost objects in the room. Robots divide the area and ...

The basis for a quantum-mechanical description of matter is electron wave functions. For atoms and molecules, their spatial distributions and phases are known as orbitals. Although orbitals are very powerful concepts, experimentally only the electron densities and -energy levels are directly observable. Regardless whether orbitals are observed in real space with scanning probe experiments, or i...

The purpose of this retrospective study was to evaluate the performance of space maintainers inserted by male undergraduate students in the College of Dentistry at King Saud University during the academic year 2006-2007. Dental records of children who had at least one space maintainer manufactured for them were reviewed. Two interns examined the selected patients and assessed the performance of...

When a scientist dies too early in their career we miss them as a colleague and as a person and, as Eve Marder explains, we also lose the science they would have done.house died, we experienced the pain of losing a special talent too young. Joplin, Lennon and Winehouse, whether you like their music or not, were special. Each had a voice, both as a sound and as a songwriter, that was unique. Whe...

The latest issue of the United Nations Educational, Scientific and Cultural Organisation (Unesco) atlas on the status of the world's languages finds threats to a growing number as a handful of languages dominate an increasingly 'globalised' world but policy towards languages can have a major effect on survival prospects. In one extreme example of the threatened status of some languages, Unesco ...

background: economic burden due to premature mortalities is significant both on health system and on the society as a whole. this study aimed to determine the productivity costs and years of potential life lost associated with five leading causes of death in iran from 2006 to 2010.   methods: data on mortality by sex and age-groups due to five main leading causes of death   (myocardial infarcti...

The main objective of this study is to estimate a part of road traffic injury costs including costs due to fatality and disability, which are related to lost social products. Lost output consists of costs, which are related to losses of national product or lost-income in death, hospitalization or physical disabilities. In recent years, the Disability-Adjusted Life Years (DALYs) has been used as...