多媒体辅助教学与西部民族地区大学英语课堂教学

信息时代对大学英语教育提出了新的挑战和要求。新世纪西部民族地区的大学英语课堂教学应该积极运用多媒体辅助教学以达到大学英语的"培养学生英语综合应用能力"的教学目标,而对如何有效运用多媒体辅助大学英语教学的研究对于西部民族地区大学英语课堂教学实践具有重大的意义。     

Multimedia Benchmarking Analysis for Three Risk Assessment Models: RESRAD, MMSOILS, and MEPAS

This paper is one in a series that describes results of a benchmarking analysis initiated by the Department of Energy (DOE) and the United States Environmental Protection Agency (EPA). An overview of the study is provided in a companion paper by Laniak et al. presented in this journal issue. The three models used in the study—RESRAD (DOE), MMSOILS (EPA), and MEPAS (DOE)—represent analytically-based tools that are used by the respective agencies for performing human exposure and health risk assessments. Both single media and multimedia benchmarking scenarios were developed and executed. In this paper, the multimedia scenario is examined. That scenario consists of a hypothetical landfill that initially contained uranium-238 and methylene chloride. The multimedia models predict the fate of these contaminants, plus the progeny of uranium-238, through the unsaturated zone, saturated zone, surface water, and atmosphere. Carcinogenic risks are calculated from exposure to the contaminants via multiple pathways. Results of the tests show that differences in model endpoint estimates arise from both differences in the models' mathematical formulations and assumptions related to the implementation of the scenarios.     

西方语言学与多媒体计算机辅助语言学习

西方语言学与多媒体计算机辅助语言学习有着密切的关系。从西方语言学的特点、发展、作用和意义等方面来探讨它对多媒体计算机辅助语言学习的意义与作用,旨在探讨多媒体计算机辅助语言学习的基本理论和意义。     

多媒体网络环境下的情境教学探讨

随着多媒体和网络技术的发展 ,教学手段和模式也发生了很大的变化 ,以建构主义学习理论为理论依据的多媒体网络环境下的情境教学 ,从教学的需要出发 ,教师依据教学目的创建以形象为主体 ,富有感情色彩的具体场景和氛围 ,激发和吸引学生主动学习 ,从而达到最佳教学效果。