فهرس المقالات Virtual Environment

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  1 - Analysis of Iranians’ Writing Performances in Virtual and Real Environments
  فرنوش حدادی Mohammad Hasan Tahririan
  Writing has always been considered an important literacy skill for foreign/second language learners. The Internet provides such unique applications for the writing skill as weblogs, wikis, and social networking websites. Up to now researchers have put their focus on the أکثر

  Writing has always been considered an important literacy skill for foreign/second language learners. The Internet provides such unique applications for the writing skill as weblogs, wikis, and social networking websites. Up to now researchers have put their focus on the learners’ performances in the traditional paper and pencil environment or wikis and blogs it is time to also consider learners’ performances in the social networking websites. In this respect the purposes of the present study were to (a) to identify the most frequent Iranian learners’ errors in the virtual environment of social networking websites, and (b) compare the learners’ performances in the traditional and virtual environments. With respect to the requirements of the research questions, this study had two phases of data collection. For the first phase, the researchers selected 30 Iranians, male and female, aged 18 to 21 from one of the social networking websites and collected a 3200-word corpus from among their comments and wall posts. All of the learners were students of Computer Engineering and IT. For the second phase of the study, another 3200-word corpus were collected from 30 Iranians, male and female, aged 18 to 21, who were studying Computer Engineering and IT at Sheikhbahaee University. They were asked to write an essay on an assigned topic. The analysis of the results revealed that three most Iranian participants’ errors were verb forms, diction, and prepositions in the virtual environment. Based on the results of the t-test, Mann-Whitney, and Chi-square tests interesting similarities and differences were observed within and between error groups in each corpus. تفاصيل المقالة
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  2 - اثربخشی آموزش برنامه‌نویسی با استفاده از محیط مجازی (نرم افزار اسکرچ) در بهبود مهارت برنامه‌نویسی
  غزاله محمدی کیهان خام فروش رفیق حسنی
  هدف این مطالعه تعیین اثربخشی آموزش برنامه‌نویسی با استفاده از محیط مجازی (نرمافزار اسکرچ) در بهبود مهارت برنامه‌نویسی دانشجویان دانشگاه آزاد واحد سنندج در مقطع کارشناسی بود. روش تحقیق از نوع نیمه آزمایشی با طرح تحقیق پیش آزمون و پس‌آزمون با گروه کنترل بود. جامعه آماری پ أکثر

  هدف این مطالعه تعیین اثربخشی آموزش برنامه‌نویسی با استفاده از محیط مجازی (نرمافزار اسکرچ) در بهبود مهارت برنامه‌نویسی دانشجویان دانشگاه آزاد واحد سنندج در مقطع کارشناسی بود. روش تحقیق از نوع نیمه آزمایشی با طرح تحقیق پیش آزمون و پس‌آزمون با گروه کنترل بود. جامعه آماری پژوهش شامل کلیه دانشجویان رشته کامپیوتر مقطع کارشناسی گرایش نرم‌افزار دانشگاه آزاد اسلامی واحد سنندج که در سال تحصیلی 98-1397 درس برنامه‌نویسی را اخذ کرده بودند. کل این دانشجویان 16 نفر بودند که به‌طور تصادفی به دو کلاس(گروه آزمایش و گروه کنترل هر کدام 8 نفر) تقسیم شدند. در این تحقیق در ابتدای دوره یک آزمون پیشرفت تحصیلی معلم ساخته که شامل مفاهیم آشنایی با دسنورات برنامه‌نویسی،تابع،روال،رخداد ،توالی دستورات درس برنامه نویسی بود به عنوان پیش‌آزمون طراحی شد و آزمون محقق ساخته‌ای که بر اساس دوره آموزش برنامه‌نویسی به روش ام‌آی‌تی ساخته شده بود به عنوان پس‌آزمون استفاده شد. داده‌های بدست آمده از طریق آزمون‌های تحلیل کوواریانس یک متغیره و چندمتغیره تحلیل شدند.. نتایج نشان می دهد که این آموزش بر افزایش مهارت روال و توابع،توالی دستورات و مهارت نوشتن شی مؤثر بوده اما بر شناخت دستورات و نوشتن رخداد مؤثر نبوده است. تفاصيل المقالة
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  3 - An automated time and hand motion analysis based on planar motion capture extended to a virtual environment
  Hector A. Tinoco Alex M. Ovalle Carlos A. Vargas Marı´a J. Cardona
  In the context of industrial engineering, the predetermined time systems (PTS) play an important role in workplaces because inefficiencies are found in assembly processes that require manual manipulations. In this study, an approach is proposed with the aim to analyze t أکثر

  In the context of industrial engineering, the predetermined time systems (PTS) play an important role in workplaces because inefficiencies are found in assembly processes that require manual manipulations. In this study, an approach is proposed with the aim to analyze time and motions in a manual process using a capture motion system embedded to a virtual environment. Capture motion system tracks IR passive markers located on the hands to take the positions of each one. For our purpose, a real workplace is virtually represented by domains to create a virtual workplace based on basic geometries. Motion captured data are combined with the virtual workplace to simulate operations carried out on it, and a time and motion analysis is completed by means of an algorithm. To test the methodology of analysis, a case study was intentionally designed using and violating the principles of motion economy. In the results, it was possible to observe where the hands never crossed as well as where the hands passed by the same place. In addition, the activities done in each zone were observed and some known deficiencies were identified in the distribution of the workplace by computational analysis. Using a frequency analysis of hand velocities, errors in the chosen assembly method were revealed showing differences in the hand velocities. An opportunity is seen to classify some quantifiable aspects that are not identified easily in a traditional time and motion analysis. The automated analysis is considered as the main contribution in this study. In the industrial context, a great application is perceived in terms of monitoring the workplace to analyze repeatability, PTS, workplace and labor activities redistribution using the proposed methodology. تفاصيل المقالة