نتایج جستجو برای: video
تعداد نتایج: 174412 فیلتر نتایج به سال:
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introduction: computer games have attracted remarkable attentions in general publics with different cultures and their effects are subject of research by cognitive neuroscientists. in the present study, possible effects of the game fifa 2015 on cognitive performance, hormonal levels, and electroencephalographic (eeg) signals were evaluated in young male volunteers. methods: thirty two subjects ...
objectives after the introduction of video-assisted thoracoscopic surgery (vats) thymectomy, there has been increased interest in the use of this technique for myasthenia gravis. we conducted a retrospective study to assess the safety and efficacy of vats thymectomy in treatment of myasthenia gravis. patients and methods the medical records of 50 patients who underwent vats thymectomy for the t...
In recent decades, video surveillance systems have an increasing development that are used to prevent crime and manage facilities with rapid diffusion of (CCTV)cameras to prevent crime and manage facilities. The video stored in the video surveillance system should be managed comfortably, but sometimes the movies are leaking out to unauthorized people or by unauthorized people, thus violating i...
three dimensional- high efficiency video coding (3D-HEVC) is the expanded version of the latest video compression standard, namely high efficiency video coding (HEVC), which is used to compress 3D videos. 3D videos include texture video and depth map. Since the statistical characteristics of depth maps are different from those of texture videos, new tools have been added to the HEVC standard fo...
The performance of video transmission over wireless channels is limited by the channel noise. Thus many error resilience tools have been incorporated into the MPEG-4 video compression method. In addition to these tools, the unequal error protection (UEP) technique has been proposed to protect the different parts in an MPEG-4 video packet with different channel coding rates based on the rate...
Introduction: Video games are common cultural issues with great influence in all societies. One of the important cognitive effects of video games is on creating stress on video players. The present research objective was to study different types of stress in players based on video game styles. Methods: A total of 80 players, aged 18 to 30 years, played four types of video games; Ru...
Background and Objective: Midwifery students should consider both maternal and fetal health. Hence, this study was conducted to compare the effects of simulation video education with lecture on midwifery students’ knowledge and self-confidence regarding cardiopulmonary assessment. Materials and Methods: In this quasi experimental study, 28 midwifery students randomly alloca...
According to progress of technology during the recent decades, video transmission through a wireless channel has found high demands. In this field, several methods have been proposed to improve video quality. Appearing error in motion vector values is one of the most important factors which can affect the video quality. In case of creating errors in motion vector, the synthesized video frames a...
Introduction: Anxiety is one of the most common problems of patients undergoing coronary angiography, which can significantly affect the process of performing this diagnostic test. One of the most important tasks of nurses is patient education. The aim of this study was to determine the effect of video education on the level of anxiety of patients under coronary angiography. Materials and Metho...
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