The cosmological relevance of emptiness—that is, space without bodies—is not yet sufficiently appreciated in natural philosophy.This paper addresses two aspects of cosmic emptiness from the perspective of natural philosophy: the distances to the stars in the closer cosmic environment and the expansion of space as a result of the acceler
Iterative imperative programs can be considered as infinite-state systems computing over possibly unbounded domains.Studying reachability in these systems is challenging as it requires to deal with an infinite number of states with standard backward or forward exploration strategies.An approach that we call Constraint-based reachability, is propose
The market of solar-powered Unmanned Aerial Vehicles (UAVs) for defence purposes and drone services is expected to grow by a factor of more than 2 in the next decade.From an aircraft design perspective, the main challenge is the scalability of the proposed architectures, which is needed to increase the payload capabilities.Beside some successful ex
Background: To determine the nutritional status of elderly by body mass index (BMI) and to investigate associated factors.Methods: This is a cross-sectional, descriptive and analytic study done among 309 elderly, in the Besiktas district of Istanbul from January to December 2008.The interviews were performed face-to-face.Anthropometric measurements