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The normal fan of a polyhedral convex set in Rn is the collection of its normal cones. The structure of the normal fan reflects the geometry of that set. This paper reviews and studies properties about the normal fan. In particular, it investigates situations in which the normal fan of a polyhedral convex set refines, or is a subfan of, that of another set. It then applies these techniques in s...
We aimed to determine the association of indices of body composition with abnormal metabolic phenotype, and to examine whether the strength of association was differentially distributed in different age groups in normal-weight Chinese adults. A total of 3015 normal-weight adults from a survey of Chinese people encompassing health and basic physiological parameters was included in this cross-sec...
INTRODUCTION The aim of study was to investigate the possibility of cardiovascular risk improvement through systematic identification of high-risk individuals and treatment in accordance with current guidelines using modern therapy in daily clinical practice. MATERIAL AND METHODS Two hundred and sixty-three physicians participated in the study. The physicians were asked to screen for cardiova...
BACKGROUND The congenital long-QT syndrome (LQTS) is an important cause of sudden cardiac death in children without structural heart disease. However, specific risk factors for life-threatening cardiac events in children with this genetic disorder have not been identified. METHODS AND RESULTS Cox proportional-hazards regression modeling was used to identify risk factors for aborted cardiac ar...
HYPOTHESIS The magnitude of risk would be highest for those reporting both types of abuse compared with those reporting 1 type or none. OBJECTIVE To examine the independent associations between physical or sexual abuse or both and self-reported health status, mental health, and health-risk behaviors among a national school-based sample of adolescent girls. DESIGN A secondary data analysis o...
In the daily routine of a clinical microbiological laboratory, pathogens can be detected in several ways. Diagnostics of infectious diseases require a strategic approach, since the etiological agent can be of bacterial, viral, fungal or protozoan origin, frequently sharing an identical syndrome. A complicating factor is that the clinical sample, sent to the laboratory, can be severely contamina...
Received June 2, 2005; accepted July 25, 2005. Cancer clinical trials have been based on low accrual rates. Barriers to recruitment of minority populations affect the generalizability and impact of trial findings for those populations. The authors undertook a mixed-methods approach to understanding levels of awareness and experiences with cancer clinical trials. A survey was administered to new...
BACKGROUND In Guinea-Bissau we conducted three trials of neonatal vitamin A supplementation (NVAS) from 2002 to 2008. None of the trials found a beneficial effect on mortality. From 2003 to 2007, an early measles vaccine (MV) trial was ongoing, randomizing children 1:2 to early MV at 4.5 months or no early MV, in addition to the usual MV at 9 months. We have previously found interactions betwee...
There is great interest in Mexico in reducing imports of grain and becoming self-sufficient in cereal production. Identifying high-yielding and stable maize (Zea mays L.) hybrids from different research institutions could contribute to increasing maize production in the highlands of Mexico. In this study, 16 early white maize hybrids were evaluated at 37 highland sites in several Mexican states...
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