نتایج جستجو برای: clonal relationships
تعداد نتایج: 251828 فیلتر نتایج به سال:
Cancer progression in humans is difficult to infer because we do not routinely sample patients at multiple stages of their disease. However, heterogeneous breast tumors provide a unique opportunity to study human tumor progression because they still contain evidence of early and intermediate subpopulations in the form of the phylogenetic relationships. We have developed a method we call Sector-...
Multidrug-resistant Klebsiella pneumoniae producing the KPC carbapenemase have rapidly spread throughout the world, causing severe healthcare-associated infections with limited antimicrobial treatment options. Dissemination of KPC-producing K. pneumoniae is largely attributed to expansion of a single dominant strain, ST258. In this study, we explore phylogenetic relationships and evolution with...
با افزایش توان تولیدی نیروگاه های بادی و تزریق آن به سیستم های قدرت، در دست داشتن روشی دقیق برای پیش بینی توان تولیدی امری بسیار مهم برای بهره برداری مناسب از این نیروگاه های و سیستم قدرت شده است. بدین منظور، در این پایان نامه، به ارائه روشی جدید برای پیش بینی توان تولیدی واحدهای بادی می پردازیم. روش پیشنهادی از یک شبکه عصبی بر اساس ویولت یا wnn ساخته شده است توسط روشی دوسطحی و نوین آموزش می بی...
To examine the correlations between virulence genotyping and multilocus sequence analysis of Escherichia coli from poultry and humans, 88 isolates were examined. The isolates were selected from a population of over 1000 based on their assignment to nine different virulence genotyping clusters. Clustering based on multilocus sequence analysis mostly correlated with virulence genotyping, although...
PREMISE OF THE STUDY Microsatellite markers were developed for a dioecious shrub, Orixa japonica (Rutaceae). Because O. japonica vigorously propagates by vegetative growth, microsatellite markers can be used to identify clonal relationships among its ramets. METHODS AND RESULTS Sixteen polymorphic microsatellite markers were identified by 454 next-generation sequencing. The number of alleles ...
In social advertising, ads are targeted based on underlying social networks and their content is tailored with information that pertains to the social relationship. This paper explores the effectiveness of social advertising using data from field tests of different ads on Facebook. We find evidence that social advertising is effective, and that this efficacy seems to stem mainly from the abilit...
We consider a setting where agents select among competing products of unknown quality by costly sequential search. The agents are active on an online social network, and late movers benefit from possibly being able to see early movers’ purchase decisions. In this setting we consider the impact of advertising by firms, and the incentives of the underlying social network platform. We consider dis...
Numerous outbreaks of cholera have occurred in Kenya since 1971. To more fully understand the epidemiology of cholera in Kenya, we analyzed the genetic relationships among 170 Vibrio cholerae O1 isolates at 5 loci containing variable tandem repeats. The isolates were collected during January 2009-May 2010 from various geographic areas throughout the country. The isolates grouped genetically int...
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