نتایج جستجو برای: مجلات isi
تعداد نتایج: 11067 فیلتر نتایج به سال:
Schizophrenia is associated with a deficit in working memory, with the degree of working memory impairment related to the level of social and occupational functioning. This study tests the hypothesis that the working memory deficits in individuals with schizophrenia can be explained by slow processing of visual stimuli, as measured by the attentional blink (AB) task. Individuals with schizophre...
STUDY DESIGN A prospective imaging study to develop diagnostic criteria. OBJECTIVE The aim of this study was to investigate image findings on delayed magnetic resonance imaging (MRI) after the acute phase of spinal cord injury without radiographic abnormality (SCIWORA) and their relationship with symptom severity. SUMMARY OF BACKGROUND DATA MRI is used to diagnose acute neurological injury,...
CONTEXT Insulin resistance is associated with altered vascular function in diabetes. OBJECTIVE The objective of the study was to define the overall and regional aortic function as well as the changes of aortic function over time in nondiabetic individuals with insulin resistance and a normal oral glucose tolerance test (OGTT). DESIGN This was a cross-sectional and longitudinal analysis with...
A Framework for Assessing the Impact of Information Systems Infrastructure on Business Effectiveness
Information systems infrastructure (ISI) was ranked as the most important issue in a 1994-1995 study of key issues in IS management (Brancheau et al. 1996). Yet, to date, little theoretical and empirical work has been done in this area. This study attempts to reconceptualize the ISI construct and its measures. Drawing from the literature, this study envisions ISI as a base of shared technologic...
مقدمه: مطالعات کارآزمایی بالینی شاهددار تصادفی، یکی از مهمترین و کارآمدترین مطالعات در علوم پزشکی می باشند. اهمیت این نوع مطالعات در حیطه زنان و مامایی، به دلیل نقش بسیار حیاتی سلامت مادران و در نتیجه سلامت جامعه، از جایگاه ویژه ای برخودار است. مطالعه حاضر با هدف ارزیابی کیفیت گزارش کارآزمایی های بالینی منتشر شده توسط پژوهشگران ایرانی در مجلات سطح 1 حیطه زنان و مامایی طراحی و انجام شد. روشکار:...
مقدمه : در چند سال اخیر، مجلات علمی- پژوهشی علوم پزشکی کشور از نظر تعداد، روند رو به رشدی داشته اند. این مجلات برای نمایه شدن در نمایه نامه های بین المللی، باید معیارها و استانداردهای لازم را رعایت کنند. این مطالعه با هدف تعیین میزان انطباق مجلات علوم پزشکی کشور با معیارهای نمایه سازی مدلاین انجام شد. روش بررسی : مطالعه حاضر از نوع توصیفی- کاربردی بود. جامعه مورد پژوهش را کلیه مجلات علمی- پژوهش...
We investigate the energy efficiency of interspike interval (ISI) neural codes. Using the hypothesis that nature maximizes the energy efficiency of information processing, it is possible to derive neuronal firing frequencies which maximize the information/energy ratio. With simple assumptions about the encoded ISI and noise distributions, we show that ISI codes can be at least as efficient as d...
Sequences of first-passage times can describe the interspike intervals (ISI) between subsequent action potentials of sensory neurons. Here, we consider the ISI statistics of a stochastic neuron model, a leaky integrate-and-fire neuron, which is driven by a strong mean input current, white Gaussian current noise, and a spike-frequency adaptation current. In previous studies, it has been shown th...
BACKGROUND This study sought to map the Insomnia Severity Index (ISI) and symptom variables onto the EQ-5D. METHODS A cross-sectional survey was conducted among adult US residents with self-reported sleep problems. Respondents provided demographic, comorbidity, and sleep-related information and had completed the ISI and the EQ-5D profile. Respondents were classified into ISI categories indica...
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