نتایج جستجو برای: تصاویر ماهوارهای rs

تعداد نتایج: 43313  

2018
Xinwei Yue Yuanwei Liu Shaoli Kang Arumugam Nallanathan Zhiguo Ding

This paper investigates the impact of relay selection (RS) on the performance of cooperative non-orthogonal multiple access (NOMA), where relays are capable of working in either full-duplex (FD) or half-duplex (HD) mode. A number of relays (i.e., K relays) are uniformly distributed within the disc. A pair of RS schemes are considered insightfully: 1) Single-stage RS (SRS) scheme; and 2) Two-sta...

2007
Vincent Claveau

RÉSUMÉ. Dans cet article, nous présentons une méthode de traduction automatique de termes biomédicaux. Cette méthode s’appuie sur une technique originale d’apprentissage supervisé de règles de réécriture et sur l’utilisation de modèles de langue. Les évaluations présentées montrent que notre technique est très performante et permet de traduire à partir et à destination de n’importe quelle langu...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2011
Michael P Ewbank Rebecca P Lawson Richard N Henson James B Rowe Luca Passamonti Andrew J Calder

Repetition of the same stimulus leads to a reduction in neural activity known as repetition suppression (RS). In functional magnetic resonance imaging (fMRI), RS is found for multiple object categories. One proposal is that RS reflects locally based "within-region" changes, such as neural fatigue. Thus, if a given region shows RS across changes in stimulus size or view, then it is inferred to h...

Journal: :Neuron 2000
Massimo Scanziani

In the hippocampus, interneurons provide synaptic inhibition via the transmitter GABA, which can activate GABA(A) and GABA(B) receptors (GABA(A)Rs and GABA(B)Rs). Generally, however, GABA released by a single interneuron activates only GABA(A)Rs on its targets, despite the abundance of GABA(B)RS. Here, I show that during hippocampal rhythmic activity, simultaneous release of GABA from several i...

ژورنال: فیض 2018

سابقه و هدف: مولکول‌های Dicer و Drosha به ­عنوان تنظیم­ کننده‌های مهم در بیوژنز miRNA‌ها نقش دارند. چندشکلی در ژن‌‌های مذکور ‌می ­تواند باعث نقص در فرآیند لانه ­گزینی جنین و منجر به سقط شود. هدف از این مطالعه ارزیابی ارتباط بین چندشکلی ژن‌های (A>G rs 3742330) Dicer و (rs 10719 C>T) Drosha با خطر سقط‌ مکرر بود. مواد و روش‌ها: مطالعه مورد-شاهدی حاضر روی 100 خانم مبتلا به سقط مکرر با عامل ناشناخته...

Journal: :The Journal of Experimental Medicine 2003
Lindsay G. Cowell Marco Davila Kaiyong Yang Thomas B. Kepler Garnett Kelsoe

The recombination signals (RS) that guide V(D)J recombination are phylogenetically conserved but retain a surprising degree of sequence variability, especially in the nonamer and spacer. To characterize RS variability, we computed the position-wise information, a measure correlated with sequence conservation, for each nucleotide position in an RS alignment and demonstrate that most position-wis...

2015
Yanli Jing Dexin Guan Jiabing Wu Anzhi Wang Changjie Jin Fenghui Yuan Xuhui Zhou

Previous studies with different experimental methods have demonstrated that photosynthesis significantly influences soil respiration (RS). To compare the experimental results of different methods, RS after girdling and defoliation was measured in five-year-old seedlings of Fraxinus mandshurica from June to September. Girdling and defoliation significantly reduced RS by 33% and 25% within 4 days...

Journal: :The Journal of clinical endocrinology and metabolism 2014
Natalia Campos-Obando Martha C Castano-Betancourt Ling Oei Oscar H Franco Bruno H Ch Stricker Guy G Brusselle Lies Lahousse Albert Hofman Henning Tiemeier Fernando Rivadeneira André G Uitterlinden M Carola Zillikens

CONTEXT Low bone mineral density (BMD) has been associated with increased all-cause mortality. Cause-specific mortality studies have been controversial. OBJECTIVE The aim of the study was to investigate associations between BMD and all-cause mortality and in-depth cause-specific mortality. DESIGN AND SETTING We studied two cohorts from the prospective Rotterdam Study (RS), initiated in 1990...

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