The goal of this brief communication is to report crosscultural data with relevance to researchers studying cooperative breeding in humans in the context of other non-human mammals. The data are derived from ethnographic research in 36 small-scale human populations/ cultural groups living on 5 continents. A number of recent accounts have described Homo sapiens as a species that practices cooper...

the matrix functions appear in several applications in engineering and sciences. the computation of these functions almost involved complicated theory. thus, improving the concept theoretically seems unavoidable to obtain some new relations and algorithms for evaluating these functions. the aim of this paper is proposing some new reciprocal for the function of block anti diagonal matrices. more...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background: to measure the amounts of fluoride released from fluoride-containing materials, four glass ionomer cements (fuji ix, fuji vii, fuji ix extra and fuji ii lc), a compomer (dyract extra) and a giomer (beautifil) were used in this study . methods: twenty cylindrical specimens were prepared from each material. the a...

Kernel based techniques have shown outstanding success in data mining and machine learning in the recent past. Many optimization problems of kernel based methods suffer from multiple local optima. Evolution strategies have grown to successful methods in non-convex optimization. This work shows how both areas can profit from each other. We investigate the application of evolution strategies to N...

An optical communication link is proposed for high speed point-to-point data transmission. The incorporates both fiber and wireless technologies. Kramer-Kronig coherent detection used due to its component implementation simplicity. Spatial multiplexing, via a multi-core followed by link, wavelength division multiplexing allow the efficient exploitation of all available degrees freedom. signal-t...