منابع مشابه
Weight problems and spam e-mail for weight loss products.
BACKGROUND This study focuses on young adult behaviors with regard to spam e-mails that sell weight loss products. METHODS Participants (N = 200) with and without weight problems were asked if they received, opened, and bought products from spam e-mail about weight loss topics in the past year. Psychological factors of self-esteem and perceived stress were measured. RESULTS Those with weigh...
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In Vertex Coloring Problems, one is required to assign a color to each vertex of an undirected graph in such a way that adjacent vertices receive different colors, and the objective is to minimize the cost of the used colors. In this work we solve four different coloring problems formulated as Maximum Weight Stable Set Problems on an associated graph. We exploit the transformation proposed by C...
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This paper investigates the impact of growing up in poverty on the risk of childhood weight problems. Understanding the effect of family income on childhood weight problems is important, but has been hindered by the potential endogeneity of family income. We use matched mother-child data from the National Longitudinal Survey of Youth (NLSY) to study the effects of growing up poor on risks of ch...
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We present a new derivation of efficient algorithms for a class of optimization problems called maximum marking problems. We extend the class of weight functions used in the specification to allow for weight functions with accumulation, which is particularly useful when the weight of each element depends on adjacent elements. This extension of weight functions enables us to treat more interesti...
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We prove polynomial-time solvability of a large class of clustering problems where a weighted set of items has to be partitioned into clusters with respect to some balancing constraints. The data points are weighted with respect to different features and the clusters adhere to given lower and upper bounds on the total weight of their points with respect to each of these features. Further the we...
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ژورنال
عنوان ژورنال: Nature
سال: 1986
ISSN: 0028-0836,1476-4687
DOI: 10.1038/322589b0