We consider a society with informed individuals (adults) and naive individuals (children). Adults are altruistic towards their own children and possess information that allows to better predict the behavior of other adults. Children benefit from adopting behaviors that conform to the social norm determined by aggregate adult behavior, but, lacking accurate information, have to rely on the obser...

  Introduction: Geometric distortion is a major shortcoming of magnetic resonance imaging (MRI), which has an important influence on the accuracy of volumetric measurements, an important parameter in neurology and oncology. Our goal is to design and construct a new three- dimensional phantom using a 3D printer in order to measure geometric distortion and its reproducibility in...

Why do insurers choose to exclude medical providers, and when would this be socially desirable? We examine network design from the perspective of a profit maximizing insurer and a social planner in order to evaluate the effects of narrow networks and restrictions on their use—a form of quality regulation. An insurer may wish to exclude hospitals in order to steer patients to less expensive prov...

the protein profiles of different iranian clinical isolats of dermatophytes (microsporum and trichophyton) were compared bv sds polyacrilamide ge! electrophoresis. although some of the protein patterns were common in both genuses, there were some genus specific protein profiles. abo within the species variety of distinct protein were profiles obtained. protein patterns can therefore distinguish...

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the purpose of this ex-post facto research is study about relationship between executive function and cognitive distortion on delinquent juveniles and non-delinquent juveniles in tehran. statistical sample are 62 delinquent juveniles selected by purposeful selection from “the center of modification and training” and 82 people of non-delinquent juveniles selected by method of random sampling fro...

Introduction Echo-planar imaging (EPI) is a group of fast data acquisition methods commonly used in fMRI studies. It acquires multiple image lines in k-space after a single excitation, which leads to a very short scan time. A well-known problem with EPI is that it is more sensitive to distortions due to the used encoding scheme. Source of distortion is inhomogeneity in the static B0 field that ...