two polygonal biogenic sedimentary rare structures of koilosoma (hitchcock 1858) have been found due to neoichnology of the abhar-rud river fluvial sediments, northwest iran. one of them is polygon holes, with about one square meter area. polygons are same in size and depth, and are hexagonal in shape. they have distinct boundaries like the honeycomb. this sample is like the reported specimens ...

the fishes of capoeta genus are living in different fauna regions of iranian freshwater fishes. the parasitological studies of these fishes are important on subjects of ecology and life cycles in different fishes. the aim of this study was to study the parasites of capoeta spp. in halil-rud river, kerman province. samples were collected from the freshwater fishes (between oct. 2007 to sep. 2008...

INTRODUCTION: Registration is a fundamental task in image processing used to match two or more pictures taken, for example, at different times, from different sensors or from different viewpoints. Such procedures are frequently needed in medical applications not only within clinical diagnostic settings, but prominently so in the area of planning and evaluation of surgical and radiotherapeutical...

This paper introduces a model of inequality aversion that captures a preference for equality of ex-ante expected payoff relative to a preference for equality of ex-post payoff by a single parameter. On deterministic allocations, the model reduces to the model of Fehr and Schmidt (1999). The model provides a unified explanation for recent experiments on probabilistic dictator games and dictator ...