Computer-Based Learning of Key Geophysical Concepts

基于计算机的关键地球物理概念学习

• 批准号: 0085458
• 负责人: George Jiracek
• 金额: $ 7.49万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0085458&HistoricalAwards=false
• 关键词: Computer; Based; Learning; Key; Geophysical

0085458JiracekThis project will develop computer-based learning tools to teach the concepts of: 1) digital signal analysis, and 2) wave characteristics, in geophysical context. This will be done in a unique way by using temporal and spatial data collected at SAGE (Summer of Applied Geophysical Experience). During the 18 years that SAGE has operated, the faculty have recognized a major lack of understanding of important fundamental geophysical concepts after courses at home campuses and after completion of the SAGE program. This is despite special efforts with extra lectures and demonstrations in these topics at SAGE. Topics such as the consequences of digitizing (aliasing, truncation, Fourier analysis, filtering, etc.) and wave phenomena such as scattering, phase and group velocity, and dispersion are simply not appreciated by most students (especially undergraduates). In today's increasingly digital world these concepts must be fully understood for basic competency in geophysics. The two topics chosen are critical to understanding many fundamental relations in several geophysical methods. The goal is to insure that those geophysics students completing SAGE, and at campuses elsewhere, understand how digital analysis is used in seismology, electromagnetics, and potential methods (gravity and magnetics). And, that they know the principles of wave propagation in low-loss, low frequency electromagnetic waves. The computer-based aids are expected to sharply increase a student's fundamental grasp of modern geophysics. The two learning modules will be integrated and hyper linked and will utilize the latest in computer simulations, visualizations, and interactive self-discovery to teach basic ideas. Advantages to tying the proposed effort to SAGE include using past, co-located SAGE data collected with different geophysical methods and to provide a unique assessment environment. The topics will be reinforced at SAGE as the students complete their own field work and apply their understanding first-hand to the collection, analysis, and interpretation of the new results. The tools will be incorporated back at the home campuses of SAGE students and faculty (including one community college) and they will be disseminated to other campuses via Internet access. Success of the modules will be determined by appropriate testing especially with SAGE REU (Research Experiences for Undergraduates) students since they return six months after SAGE for a winter workshop. To insure proper testing the PIs have enlisted the assistance of the Center for Research in Math and Science Education at San Diego State University (SDSU). Development of computer graphics, animation, and visualization will be done by SDSU's Instructional Technology Services under the technical direction of SAGE faculty.

这个项目将开发基于计算机的学习工具来教授以下概念：1)数字信号分析，2)地球物理背景下的波特性。这将以一种独特的方式完成，利用SAGE（夏季应用地球物理经验）收集的时间和空间数据。在SAGE运营的18年里，教师们已经认识到，在家庭校园的课程和SAGE项目完成后，对重要的基础地球物理概念的理解严重缺乏。尽管SAGE在这些主题上做了额外的讲座和演示，但还是做出了特别的努力。诸如数字化（混叠、截断、傅立叶分析、滤波等）和波现象（如散射、相速度、群速度和色散）的后果等主题，大多数学生（尤其是本科生）根本不了解。在当今日益数字化的世界中，必须充分理解这些概念才能获得地球物理学的基本能力。所选择的两个主题对于理解几种地球物理方法中的许多基本关系至关重要。目标是确保那些完成SAGE的地球物理学学生，以及其他学校的学生，了解数字分析如何在地震学、电磁学和潜在方法（重力和磁学）中使用。并且，他们知道低损耗，低频电磁波的波传播原理。这些以计算机为基础的教具有望大大提高学生对现代地球物理学的基本掌握。这两个学习模块将被整合和高度链接，并将利用最新的计算机模拟、可视化和交互式自我发现来教授基本思想。将所提议的工作与SAGE结合起来的优势包括使用过去的、用不同地球物理方法收集的、位于同一地点的SAGE数据，并提供一个独特的评估环境。随着学生完成自己的实地工作，并将他们的理解应用到新结果的收集、分析和解释中，这些主题将在SAGE得到加强。这些工具将被纳入SAGE学生和教师的家庭校园（包括一所社区学院），并将通过互联网接入传播到其他校园。这些模块的成功将通过适当的测试来确定，特别是SAGE REU（本科生研究经验）学生，因为他们在SAGE后六个月返回冬季研讨会。为了确保适当的测试，这些pi获得了圣地亚哥州立大学数学和科学教育研究中心的帮助。计算机图形、动画和可视化的开发将由SDSU的教学技术服务部门在SAGE教师的技术指导下完成。