Studies of clinal variation have helped greatly in the elucidation of the mechanisms of both adaptation and speciation (Endler 1977; Barton and Hewitt 1989). Clines have been explained by selection acting within a continuous population ( primary intergradation ) or, more frequently, as the result of contact between populations differentiated in allopatry (secondary intergradation) (Endler 1977;...

General Relativity describes the state in which radiation concentrates around a star. Klein (1948) worked on it and obtained an approximate solution to Einsteinian field equations in spherical symmetry for a distribution of diffused radiation. Many other researchers (Singh and Abdussattar, 1973; Roy and Bali, 1977) have worked on this topic and obtained exact static spherically and cylindricall...

Natural ecosystems contain many individuals and species interacting with each other and with their abiotic environment. Such systems can be expected to exhibit complex dynamics in which small perturbations can be amplified to cause large changes. Here, we document the reorganization of an arid ecosystem that has occurred since the late 1970s. The density of woody shrubs increased 3-fold. Severa...

I want to begin by expressing my sincerest appreciation to The American Society of Human Genetics (ASHG) for this wonderful recognition and award; Vivian Cheung, Evan Eichler, and Stanislas Lyonnet for their nominations; and Evan Eichler for his very kind introduction. I want to thank each of you who are here today and particularly my wife and my daughters, who seldom get to hear what I have be...

Ever since his dissertation (1977), Geert Booij has been well known to the linguistic community as phonologist and morphologist. He is (together with Jaap van Marle) co-founder and editor of the well-established Yearbook of Morphology, published since 1988, and he is also one of the editors of the international handbook of morphology (Booij, Lehmann, & Mugdan 2000). In 1995 he, together with hi...

We present an algorithm for automatically constructing a decompositional shape model from examples. Unlike current approaches to structural model acquisition, in which one-to-one correspondences among appearance-based features are used to construct an exemplar-based model, we search for many-tomany correspondences among qualitative shape features (multi-scale ridges and blobs) to construct a ge...

Foraging and feeding requirements shape ecologic and evolutionary patterns for many predatory organisms. The idea that organisms maximize energy intake during foraging is one of the major assumptions of foraging theories (Schoener 1971; Pyke et al. 1977). From recent studies (for review see Brown & Kotler 2004) it is apparent that foraging decisions are not strictly related to meal size but tha...

many studies employing various methods have been carried out into the number densities of excited atoms in electrical discharges with inert gases [1,2,3], but the ranges of the discharge current and gas pressure is very limited in them all. in this work, the population densities of 3s, 3s' of neon have been investigated using the atomic absorption method. since the discharge current and ga...

AIM To evaluate the content of household drug supplies and self-medication practice among medical and pharmacy students at Zagreb University in 2001, and to relate the findings to a previous survey in 1977. METHODS A cross-sectional anonymous questionnaire-based survey included 287 students who inventoried drug supplies in their family households and interviewed the household members on drug ...

Governments around the world evaluate economic performance using macroeconomic indicators, such as GDP. In this study emergy accounting was used to assess the economy of Argentina during the 20 century. Emergy evaluations of the Argentine economy for five time periods (1900-1929, 1930-1943, 1944-1975, 1976-1989, and 1990-1995) were conducted. Results were compared with evaluations of other coun...