一种新颖的测定分子间势能及普适气体常量R的热学实验装置设计     

叶南阳 《衡阳师范学院学报》2012,33(3):68-70

设计了一种简单的实验装置,可同时测量分子间相互作用的势能和普适气体常量R。其实验曲线符合理论值,误差分析后的补偿曲线所得结果可较为精确地与理论结果吻合。该实验常温下即可进行,且精度较高。该装置可用于课堂教学,有利于学生对热学问题的深入理解。  相似文献   

Funding public computing centers: Balancing broadband availability and expected demand     

Krishna JayakarAuthor Vitae  Eun-A Park^{Author Vitae} 《Government Information Quarterly》2012,29(1):50-59

The National Broadband Plan (NBP) recently announced by the Federal Communication Commission visualizes a significantly enhanced commitment to public computing centers (PCCs) as an element of the Commission's plans for promoting broadband availability. In parallel, the National Telecommunications and Information Administration (NTIA) has channelized part of the Broadband Technology Opportunities Program (BTOP) funding to PCCs. However, BTOP funding was the result of an unprecedented economic crisis, and is unlikely to be repeated. Future programs will need to evolve criteria for selecting projects for funding that maximize their cost-effectiveness. We argue in this paper that basing funding for PCCs on broadband availability (or non-availability), is not as cost-effective as considering a broader array of factors related to demand for internet access at public computer centers. We use data on public libraries from the National Center of Educational Statistics to identify factors predicting high demand for internet access at PCCs. Based on this analysis, we argue that low demand markets may benefit more from consumer outreach and digital literacy programs, than from infrastructure deployment. Also, we argue that markets with high availability, should receive more funding if there is high demand as well, as predicted by our model.  相似文献   

USB技术释析     

徐明  杨扬 《潍坊教育学院学报》2004,17(3):62-63

USB( Universal Serial Bus) ,“通用串行总线”接口 ,是一种简单的计算机外围接口标准。它具有即插即用、方便扩展等优点 ,已成为计算机的必备接口。本文论述了 USB的系统拓扑结构、数据传输方式及USB接口的应用和发展前景。  相似文献   

USB在数据采集系统中的应用     

桑兰  王新锁 《九江职业技术学院学报》2004,(1):22-23,32

通用串行总线USB为多点数据采集提供了很大的便利，它可以实现较传统方式更有效、更经济、点数更多的数据采集。  相似文献   

Engaging and training students in the development of inclusive learning materials for their peers     

Sally Everett  Gina Oswald 《Teaching in Higher Education》2018,23(7):802-817

With equal access requirements and increasing rates of enrolment of students with disabilities in higher education, universities must find appropriate and efficient ways to create accessible materials which benefit and support all students. In response to cuts to disability funding, issues relating to the provision of an inclusive curriculum are now dominating institutional policy and educational discourses. This paper reports on a trans-Atlantic project which utilised student employees to convert and develop inclusive learning materials for their peers, with the expressed purpose of piloting a sustainable intervention method generalisable to meeting similar needs of diverse universities for inclusive material provision and a future workforce aware of disability issues and accommodations. Qualitative in-depth interviews with ten students (eight UK and two US) find that involving student employees in the delivery of inclusive materials improves partnerships and attitudes around disability and accessibility measures.  相似文献   

Towards universal access to all knowledge——Internet Archive     

KAHLE Brewster 《浙江大学学报(A卷英文版)》2005,(11)

INTRODUCTION The Library of Alexandria was founded with the goal of obtaining a copy of every published work in the world to become the center for scholarship in 288 BC. It was based on a technical advance, or rather, a change in the medium of recording to papyrus from clay tablets. Technological advances, for the first time since the loss of the Library of Alexandria, may allow us to collect all published knowledge in a similar way. But now we can take the original goal another step fu…  相似文献   

国际书目数据通信格式(UNIMARC)的维护、创新与发展——兼谈《国际机读目录格式手册:书目格式》(第3版)的修订     

蒋敏 《图书馆建设》2011,(5)

《国际机读目录格式手册:书目格式》(以下简称《UNIMARC手册》)(第3版)于2008年正式出版,它包含了2005年以来《UNIMARC手册》(第2版)第5次更新后的格式变化。《UNIMARC手册》(第3版)的修订主要包括以下几个方面:扩展了字段链接,设立了003字段永久记录标识,增加了字段的功能,新增了字段,部分字段增加了子字段,改变了部分字段名称和字段的功能,改变了部分字段指示符的值。目前《UNIMARC手册》(第4版)的修订工作正在进行,它将使UNIMARC进一步适应编目对象的多样化,适应不断变化、更新的新技术和新编目规则,提高网络环境下UNIMARC的可用性。  相似文献   

东北方言中的泛义动词“整”和“造”     

杨春宇  佟昕 《大连大学学报》2013,(2):42-46

在东北方言中,"整"和"造"是两个使用频率相当高的泛义动词,可称得上是东北方言中的两个"万能动词"。本文对这两个动词在东北方言中的意义与功能进行了描述,并初步从史的角度进行了解释,列表分析了两个泛义"万能动词"的异同,进而凸显出东北地域这两个方言动词的语法特色,为泛义动词类型比较提供个案研究参照。  相似文献   

印度初等教育普及计划（SSA）对弱势群体教育公平的促进及面临的难题*     

杨旻旻  连进军 《外国中小学教育》2013,(6)

印度初等教育普及计划也称SSA计划,是印度政府开展的旨在推动小学教育义务教育普及和质量提高的运动。这场运动同样将促进弱势群体教育公平作为主要目标之一。为此,SSA计划采取了建立临时教育机构、实施女童特殊教育计划、实行全纳教育、推行反歧视行动细则等措施来弥合印度存在的性别上以及不同社会阶层的教育差距。十年来,SSA计划在入学人数的提高、性别差距以及基础设施的改善等方面取得了一定的成绩,但是,社会阶层、城乡和地区的教育差距状况依然严峻。总体而言,弱势群体整体的教育状况并没有得到改善,辍学率高、教育质量低依旧是弱势群体两大难题。  相似文献   

Leveraging Sunken Investments in Communications Infrastructure: A Policy Perspective From the United States     

Anthony G. Wilhelm 《The Information Society》2013,29(4):279-286

Bridging the digital divide between information and technology haves and have-nots has waned from the top of the national policy agenda in the United States during a time in which the sunken investments of the 1990s need to be leveraged. A national information network now exists yet this infrastructure--largely hardware--needs to be continually modernized and parlayed with commitments to building human capacity, developing relevant content, and scaling socially beneficial technology applications, such as telemedicine, in order to optimize these initial multi-billion-dollar outlays. This article makes the case that sidestepping public-private initiatives aimed at accelerating digital opportunity is imprudent, given the mounting empirical evidence highlighting the payoffs of information and communications technologies, when properly integrated and applied, especially in enhancing the life chances of underserved Americans. Policy next steps should advance the goals of expanding universal service initiatives, including hastening broadband deployment to homes and learning institutions, and deepening programs which leverage the utility of the existing infrastructure, such as expanding human-capital development, producing relevant content, and innovating socially beneficial technology applications.  相似文献