OBJECTIVES Social capital, collective efficacy, and religious involvement have each been linked to population health. This study examined the relations between these measures and male/female mortality rates in Hungary. DESIGN Cross sectional, ecological study. SETTING 150 sub-regions of Hungary. PARTICIPANTS AND METHODS 12643 people were interviewed in 2002 (the "Hungarostudy 2002" survey...

Items from a database are often ranked based on a combination of multiple criteria. A user may have the flexibility to accept combinations that weigh these criteria differently, within limits. On the other hand, this choice of weights can greatly affect the fairness of the produced ranking. In this paper, we develop a system that helps users choose criterion weights that lead to greater fairnes...

In the d-dimensional knapsack problem given is a set of items, each having a d-dimensional size vector and a profit, and a d-dimensional bin. The goal is to select a subset of the items of maximum total profit such that the sum of all vectors is bounded by the bin capacity in each dimension. It is well known that, unless P = NP , there is no fully polynomial time approximation scheme for d-dime...

We study procurement games where each seller supplies multiple units of his item, with a cost per unit known only to him. The buyer can purchase any number of units from each seller, values different combinations of the items differently, and has a budget for his total payment. For a special class of procurement games, the bounded knapsack problem, we show that no universally truthful budget-fe...

Contents displayed on web portals (e.g., news articles at Yahoo.com) are usually adaptively selected from a dynamic set of candidate items, and the attractiveness of each item decays over time. The goal of those websites is to maximize the engagement of users (usually measured by their clicks) on the selected items. We formulate this kind of applications as a new variant of bandit problems wher...

BACKGROUND The purpose of this study was to reduce the number of items, create a scoring method and assess the psychometric properties of the Freedom from Glasses Value Scale (FGVS), which measures benefits of freedom from glasses perceived by cataract and presbyopic patients after multifocal intraocular lens (IOL) surgery. METHODS The 21-item FGVS, developed simultaneously in French and Span...

Broadcasting is an efficient and scalable way of transmitting data over wireless channels to an unlimited number of clients. In this paper the problem of allocating data to multiple channels is studied, assuming flat data scheduling per channel and the presence of unrecoverable channel transmission errors. The objective is that of minimizing the average expected delay experienced by the clients...

<p><span>The purpose of the study was to examine level digital citizenship skills among undergraduate students at Sultan Idris Education University, Perak, Malaysia. The focused on three sub-variables skills; online wellbeing, learning and safety. paper present report from a questionnaire conducted 1000 nine different faculties. Items for each variable were constructed based literat...