نتایج جستجو برای: 2004 snieder 2004 bensen et al2007
تعداد نتایج: 597715 فیلتر نتایج به سال:
In recent years, there have been an increasing number of achievements dealing with the control of agent formations (Olfati-Saber, 2006; Tanner & Jadbabaie, 2007; Fax & Murray, 2004; Jadbabaie et al., 2003; Lin et al., 2004; Olfati-Saber & Murray, 2004). The formation control of multiple moving agents has emerged as a topic of widespread interest due to its broad range of applications in militar...
Neural stem cells have the capacity to self-renew, proliferate, and give rise to lineage-restricted neuronal and/or glial progenitor cells and postmitotic specialized daughter cells. Neural progenitor cells located in the subgranular zone (SGZ) of the dentate gyrus (DG) give rise to immature neurons. These then migrate to the granule cell layer, where they differentiate into granule neurons tha...
Population dynamics of A. ritzemabosi and D. dipsaci were studied in two alfalfa fields in Wyoming. Symptomatic stem-bud tissue and root-zone soil from alfalfa plants exhibiting symptoms of D. dipsaci infection were collected at intervals of 3 to 4 weeks. Both nematodes were extracted from stem tissue with the Baermann funnel method and from soil with the sieving and Baermann funnel method. Soi...
Previous formulations of coda wave interferometry make it possible to assess the average change of the medium, but they do not allow for the spatial localization of this change (Snieder et al., 2002; Snieder, 2002). We present an approach for localizing temporal changes in the medium using strongly scattered waves, and test it with numerical models for 2D scalar waves. Using an integral represe...
Tutoring systems researchers have recognized the need to identify and address affective states that lead to disengagement in learning activities (Baker, D’Mello, Rodrigo, & Graesser, 2010; D’Mello, Lehman, & Graesser, 2011; D’Mello Strain, Olney, & Graesser, 2013; Forbes-Riley, Litman, Friedberg, 2011; Gee, 2004, 2007; Picard et al., 2004). Some affective states have relatively uncomplicated re...
هدف اصلی از انجام این پژوهش، که مبتنی بر راهبرد روابط علّی میان متغیرها انجام شده است، بررسی عوامل شخصیتی موثر در مقاومت در برابر استفاده از فنّاوری اطلاعات در سازمان های دولتی شهر رفسنجان بود. در راستای نیل به این هدف و بر اساس نتایج پژوهش معلوم شد که: 1) ادراک سودمندی فنّاوری اطلاعات در مقاومت در برابر استفاده از آن اثر منفی معناداری دارد؛ در حالی که ادراک سهولت استفاده از فنّاوری اطلاعات در مقا...
1-1- اهمیت روغن خوراکی روغن گیاهی جایگاه ویژه ای در سبد غذایی خانوار دارد. علی رغم سرانه بالای مصرف این محصول در کشور، میزان وابستگی کشور به واردات روغن خوراکی در سال 1384، 85% بوده و در سال 1387 این مقدار به 75% رسیده که هنوز آمار نگران کننده ای است (2 و 4). بر اساس آمار سازمان خوار و بار جهانی (f.a.o.) درباره تولید دانه های روغنی در ایران و واردات روغن در کشور، میزان واردات دانه های روغنی از...
In this paper we propose a new coordination approach for the AulaNet Learning Management System. The proposed coordination protocol is based on a workflow mechanism that could be used by teachers to define some specific sequence of activities within a course run within AulaNet. This way, at least part of the social protocol that governs the flow of the course could be enforced by software.
The Ensembl (http://www.ensembl.org/) database project provides a bioinformatics framework to organize biology around the sequences of large genomes. It is a comprehensive and integrated source of annotation of large genome sequences, available via interactive website, web services or flat files. As well as being one of the leading sources of genome annotation, Ensembl is an open source softwar...
In this paper we outline a new process model for security engineering.This process model extends object oriented, use case driven software developmentby the systematic treatment of security related issues. We introduce the notion ofsecurity aspects describing security relevant requirements and measures at acertain level of abstraction. We define a micro-process for security anal...
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