نتایج جستجو برای: مجلههای علمی isi

تعداد نتایج: 43813  

2014
Anwar E. Ahmed

BACKGROUND Research on sleep health is lacking in developing countries, particularly among the Sudanese population. This contributes to a number of social and safety risks such as workplace injury, daytime sleepiness, automobile accidents, and more. The current study aims to validate three Arabic questionnaires related to sleep health, namely the Epworth Sleepiness Scale (ESS), Insomnia Severit...

Journal: :Human brain mapping 1999
A M Dale

An important challenge in the design and analysis of event-related or single-trial functional magnetic resonance imaging (fMRI) experiments is to optimize statistical efficiency, i.e., the accuracy with which the event-related hemodynamic response to different stimuli can be estimated for a given amount of imaging time. Several studies have suggested that using a fixed inter-stimulus-interval (...

2012
Aurel Vasile Martiniuc Alois Knoll

The information regarding visual stimulus is encoded in spike trains at the output of retina by retinal ganglion cells (RGCs). Among these, the directional selective cells (DSRGC) are signaling the direction of stimulus motion. DSRGCs' spike trains show accentuated periods of short interspike intervals (ISIs) framed by periods of isolated spikes. Here we use two types of visual stimulus, white ...

Journal: :CoRR 2014
Runxin Wang Rongke Liu Yi Hou

Polar codes are a class of capacity-achieving codes for the binary-input discrete memoryless channels (B-DMCs). However, when applied in channels with intersymbol interference (ISI), the codes may perform poorly with BCJR equalization and conventional decoding methods. To deal with the ISI problem, in this paper a new joint successive cancellation (SC) decoding algorithm is proposed for polar c...

Journal: :Vision Research 2002
Hiroyuki Sogo Naoyuki Osaka

We investigated the perceived locations of two stimuli flashed successively near the time of saccade execution in a dark room. The inter-stimulus interval (ISI) between the flashes ranged from 80 to 240 ms. The results show that when the ISI was 120 ms or shorter, perceived locations of the flashes interacted with each other so that the perceived distance between them was equal to the distance ...

Journal: :Human brain mapping 2003
Chun-Siong Soon Vinod Venkatraman Michael W L Chee

We investigated the extent of hemodynamic recovery following the paired presentation of either identical or different faces at two different inter-stimulus intervals (ISI). Signal recovery was consistently better at an ISI of 6 sec compared to 3 sec. Significantly less signal recovery was associated with identical faces compared to different faces in bilateral mid-fusiform and right prefrontal ...

ژورنال: :مجله علوم پزشکی رازی 0
احمد یوسفی ahmad yousefi instructor and member of scientific board of razi vaccine and serum research institute, hesarak, karajموسسه تحقیقات واکسن و سرم سازی رازی، حصارک، کرج عباس گیلوری abbas gilvari agricultural scientific information and documentation center, tehranمرکز اطلاعات و مدارک علمی کشاورزی، تهران طیبه شهمیرزادی tayyebe shahmirzadi agricultural scientific information and documentation center, tehranمرکز اطلاعات و مدارک علمی کشاورزی، تهران مرتضی همّت morteza hemmat tehran universityدانشگاه تهران مریم کشاورز maryam keshavarz tehran university of medical sciencesدانشگاه علوم پزشکی تهران

زمینه و هدف: در حال حاضر، میزان تولیدات علمی نمایه شده در پایگاه های اطلاعاتیِ معتبرِ جهان نظیر isi از معیارهای مهم ارزیابی و رتبه بندی علمی کشورها، پژوهشگران، موسسات و دانشگاه ها در جهان است. سهم هر کشوری در تولیدات علمی جهان به طور کلی و همچنین در حوزه ای خاص، بر همین اساس محاسبه می شود. لذا، تعیین میزان رشد و وضعیت مقالات نویسندگان ایرانی در پایگاه اطلاعاتی isi در حوزه ایمنی شناسی از جنبه های ...

2014
Calvin Ardi John Heidemann

With the vast amount of accessible, online content, it is not surprising that unscrupulous entities “borrow” from the web to provide filler for advertisements, link farms, and spam and make a quick profit. Our insight is that cryptographic hashing and fingerprinting can efficiently identify content reuse for web-size corpora. We develop two related algorithms, one to automatically discover prev...

2002
Leon Poller Michelle Keown Nikhil Chauhan Anton M.H.P. van den Besselaar Armando Tripodi Caroline Shiach Jorgen Jespersen

Background: The International Sensitivity Index (ISI) calibration of whole-blood prothrombin time (PT) monitors for point-of-care testing (POCT) described by Tripodi et al. (Thromb Haemost 1993;70:921–4) has been shown to be dependable but is too complex and demanding. The use of plasma would simplify calibration of whole-blood POCT PT monitors, but important differences may exist between the I...

Journal: :hepatitis monthly 0
seyyed mohammad miri baqiyatallah research center for gastroenterology and liver diseases, ir iran; kowsar, the netherlands +98-2188621755, [email protected] azam raoofi kowsar, the netherlands +98-2188621755, [email protected]; kowsar, the netherlands +98-2188621755, [email protected] zahra heidari kowsar, the netherlands +98-2188621755, [email protected]; department of clinical psychology, shahid beheshti university of medical science and health services, ir iran

background citation analysis as one of the most widely used methods of bibliometrics can be used for computing the various impact measures for scholars based on data from citation databases. journal citation reports (jcr) from thomson reuters provides annual report in the form of impact factor (if) for each journal. objectives we aimed to evaluate the citation parameters of hepatitis monthly by...

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