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1.
Analysis of the urban/rural broadband divide in Canada: Using GIS in planning terrestrial wireless deployment 总被引：3，自引：0，他引：3
M. Sawada Daniel Cossette Barry Wellar Tolga Kurt 《Government Information Quarterly》2006,23(3-4):454
Millions of Canadians residing in Canada's northern, isolated, rural, and remote communities do not have broadband Internet access. This situation has led to a national “broadband divide.” That is, the deployment of wireline broadband is very limited in Canada's northern, isolated, rural, and remote areas because of the significant expense of installation and maintenance of the wired infrastructure needed to reach dwellings in these locations.Terrestrial broadband wireless technology, on the other hand, does not entail the same kind of physical infrastructure. As a result, there are dramatic changes in how spatial considerations affect the provision of broadband Internet services (BIS) to areas beyond the urban zone. In particular, the spatial question is now focused on assessing the capacity for different technological solutions to reach profitable population bases, and brings to the forefront organizations that are developing non-line-of-sight (NLOS) technologies that would permit wireless Internet access over much greater distances than current solutions.We begin this paper by establishing the importance of broadband connectivity to Canada's northern, isolated, rural, and remote communities. This discussion comments on the role of the Government of Canada in the provision of broadband connectivity to residents of these communities, and outlines the current regulatory issues that govern wireless services and policy formulation.The second part of the paper illustrates the use of geographic information system (GIS) approaches in the study of wireless broadband planning and deployment. Case study findings suggest that GIS applications can make a significant contribution to the analysis of wireless deployment planning, to the understanding of the relationships between wireless signal sources and consumers, and to the spatial configuration of terrestrial wireless broadband networks. We conclude the paper by discussing how the GIS approach employed could be used to inform the public policy process with regard to increasing access to broadband Internet services in all regions of the country, and thereby providing the opportunity for all Canadians, regardless of location, to fully participate in the Information Society. 相似文献
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In order to study the changes in the forms and methods for information support of scientific research over the last 15 years, the authors performed quantitative and factual analysis of SDI-and DSM-related document flows represented in the VINITI RJ “Informatics,” as well as national and foreign web environment and the information published on the websites of RAS libraries. The study revealed that SDI-and DSM-based information support show signs of decline rather than development. Evidently, this can be attributed to economic and technological reasons. SDI services abroad are developing dynamically on the basis of new technologies and resources. In many countries, a number of libraries, publishing houses, and information centers make wide use of SDI based on web information filtering systems. The authors raise the problem of SDI application to the information support of national scientific research on a new resource and technological basis. 相似文献
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The problems of facilitating the processing of context queries in information retrieval systems (IRS) with proprietary data repositories are considered. A method for indexing fields with a large spread in values is proposed and its efficiency for real bases of information on abstracts is demonstrated. A method involving the use of SQL expressions within the IRS language is presented, as well as the processing of combined queries. 相似文献
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Pauline Oghenekaro Adeniran 《The Reference Librarian》2018,59(1):56-63
ABSTRACTThe increase in information explosion has left information users with the option of adopting the best means to access and make ethical use of the right information. The role information plays in the society cannot be overemphasized. Information is required for individual, institution and societal development. Hence, efforts must be expended to acquire the right information in a world where information is being produced exponentially with almost no control. Accessing the right information is vital for any form of development hence the academic libraries’ role in ensuring an effective delivery of the right information to their users. Selective Dissemination of Information (SDI) service is one of the means through which libraries achieve this. The study investigates SDI service adoption and use by academics at Redeemer’s University, Nigeria. Statistics kept in the Reference Unit of the library were used to elicit information used for analysis. Sixty-sis (66) out of a total of 135 academics working in the institution at the time the statistics were taken were used for analysis. The study reveals that majority of the academics who sought SDI service were staff of the college of Management Sciences. The study reveals that majority of the academics sought SDI service for the purpose of research. Comments of users from records kept in the unit shows that users’ information needs were adequately satisfied. Users’ comments also reveal areas of improvement on the service. Recommendations geared towards the improvement of SDI service in the university library were given based on the conclusion drawn. 相似文献
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Maria C. Porcal-Gonzalo 《Journal of Map & Geography Libraries》2015,11(3):289-329
In recent years, there has been a growing recognition of the fact that the proper management of information has to include concern for its preservation and future re-use. This ambition is particularly significant for geospatial data. The primary aim of this article is to define the European and Spanish frameworks for the preservation and reutilization of geographical information, with the ultimate goal of proposing an articulated, lifecycle-based data management model. With this, the intent is to shed some light on a complex, difficult and ever-evolving subject.The article is divided into two main parts. The first part begins with a conceptual justification for geospatial data management and continues by synthesizing the current normative and technological framework for the preservation and reutilization of geographical information. Within this context, the implementation of Spatial Data Infrastructures (SDI) in Spain is evaluated. The second part begins with a case study from Spain that aims to identify different agents and flows that influence the lifecycle of geographical data, as well as the strengths and weaknesses found in each stage of the process under examination. Finally, the foregoing ideas are used in order to propose a SDI-related system for the management of geographical information. 相似文献
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[目的/意义] 学科竞争力是高校竞争力的核心体现，高校的发展态势、竞争优势、声誉形象，根本体现来源于学科的发展水平。摸清学科现状、明确方向、找出差距、制定对策，是学校管理层考虑的重要问题。图书馆作为文献信息服务中心，可以基于丰富的信息资源和情报分析人才为决策者提供学科竞争力方面的决策支持服务。[方法/过程] 科学合理的学科竞争力分析指标体系和研究方法能够为科学决策打下良好基石。学科竞争力分析体系包括构建总体框架、筛选指标体系、明确对标院校，并注重数据来源的可获得性和分析方法的丰富性。以北京大学图书馆完成的学科竞争力分析报告为例进行全方位阐释。[结果/结论] 基于用户需求调研，采取全面客观的指标体系，对多模态的来源数据进行深度处理和规范化操作，并通过多种分析数据库、数据分析软件、可视化分析工具等对数据进行多维度分析，形成一套科学有效的高校学科竞争力分析流程和方法，操作性强，可以为校领导、科研团队、师生及学校相关机构提供深度的学科情报咨询决策服务，也可为更多高校图书馆开展此类服务提供借鉴。 相似文献
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Demchenko Yuri Zhao Zhiming Grosso Paola Wibisono Adianto de Laat Cees 《中国科技资源导刊 (中国信息导报)》2013,(1):30-35
首先探讨大数据科学（Big Data Science）给现代和未来科研数据基础设施（SDI）带来的挑战,并参考不
同科研团体的工作对数据管理、访问控制和安全要求进行定义,然后介绍科研数据生命周期管理（SDLM）模型,分析
所有的主要阶段,反映现代e-Science的数据管理特性,提出SDI 通用架构模型,为利用现代技术和最佳实践构建以互
用性数据或项目为中心的SDI 奠定了基础,最后对如何利用基于云的现代基础设施服务配置模型顺利实现文中提出的
SDLM和SDI 模型进行阐述,解决SDI 资源的联合访问控制问题,为科研团体提供了一种灵活的访问控制和身份管理模
型。 相似文献
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网络环境下的文献信息服务 总被引：34，自引：3，他引：31
介绍了目前比较先进的文献信息服务系统和服务方式，包括OPAC，OCLC，定题服务的新发展，全文数据库及最新的资源整合系统等，以信息服务的评价原则为依据，归纳了网络环境下文献信息服务的特点及发展趋势。 相似文献
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S S Yunis 《Bulletin of the Medical Library Association》1973,61(1):4-14
The Missouri Institute of Psychiatry Library has implemented an inexpensive, manual SDI (Selective Dissemination of Information) service based upon the monthly issues of Index Medicus. The implementation and refinement of the system are documented, and the very favorable response to the system is examined. The SDI service is compared to Current Contents, with the finding that 60 percent of the SDI participants prefer it to Current Contents. For this select portion of researchers the Index Medicus SDI is the more suitable mode of current awareness. For a significant portion of the MIP staff, however, the scope of Index Medicus is too restricted to suitably replace Current Contents. All SDI users find it a highly acceptable current awareness service for use in addition to Current Contents and have indicated the desire to continue participation in the service. 相似文献
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网络环境下基于知识管理的SDI 总被引：7，自引：0，他引：7
网络的飞速发展,使SDI从传统走向网络化;知识管理的兴起,则促使SDI在吸收知识管理的先进理念和方法的基础上,演变为图书情报机构面向社会提供知识服务的关键手段。 相似文献
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指出嵌入式专题信息服务是对传统专题信息服务的突破和发展,分析现阶段专题信息服务存在的问题,论述嵌入式专题信息服务三个层面的特征：用户场景嵌入、科研过程嵌入、服务系统整合嵌入。以面向科研创新全过程为出发点,阐述嵌入式专题信息服务的内容,并例举嵌入式专题信息服务系统模型的实例。 相似文献
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分析了网络时代定题服务工作的现状，并针对当前定题服务工作中的问题设计了网上定题服务系统，以探索尝试网络环境下定题服务工作发展的新思路。 相似文献
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对军事信息政策几个理论问题的思考 总被引：1，自引：0，他引：1
当前军队信息化建设取得很多成绩，同时也面临诸多瓶颈。其中急待解决的是制定符合军队建设实际的军事信息政策。本文详细分析了军事信息政策相对于国家信息政策的特殊性，从中概括出它的内涵和特点，探讨了它的制定原则，最后提出其框架体系。参考文献19。 相似文献
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目前,定题服务合同内容普遍以格式条款进行表述,但存在着合同条款分散、条款内容不全面且不具体、权利义务不明确、部分条款内容对委托方不公平,合同履行缺乏有效协作,合同履行过程中有侵权行为等问题。故此,应明确定题服务合同属于技术服务合同,并应准确把握定题服务合同主体特定性、公益性、非营利性、持续性、格式性合同等特征,完善格式合同条款内容,严格遵守定题服务合同的履行原则。 相似文献
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[目的/意义] 科学数据是科研档案的重要组成部分,判断地方政府关于科学数据管理的政策导向,对档案部门制定科学数据管理与政策具有较强的实践指导价值。[方法/过程] 选取13份我国地方政府发布的科学数据管理实施细则,运用政策工具对其进行量化研究,分析目前我国科学数据管理政策的现状,从档案管理的视角出发提出有利于档案部门科学数据管理政策发展的启示。[结果/结论] 档案部门作为守护信息资源的重要机构,要发挥其在科学数据管理中的优势和特点,积极推动科学数据管理政策体系的发展与完善,促进科学数据归档政策制定,加强科学数据管理政策的协同发展。 相似文献
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专利检索是一个非常复杂的过程,用户为了迅速高效地完成检索任务需要得到支持。专利检索过程的许多环节可以借助一些工具完成,其中就包括查询(式)构造工具。查询构造是一项高度依赖人工的任务,工具只能实现对可能有用数据进行预先计算,并针对用户进行可视化。信息检索系统中,查询过程和查询结果可视化的方式有很多。本研究提出了两种典型的原型系统设计,用于在专利检索过程中对不同的查询表达式进行比较。原型包含查询表达式构造因素和结果集大小因素,两种因素对于专利领域专家探究查询表达式的调整对检索效率的影响至关重要。本文开发的系统有助于在专利检索过程中对复杂查询表达式进行逐步优化,系统设计思想基于了领域专家型知识工程。 相似文献
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对军队院校图书馆文献信息数字化建设的设想 总被引：1，自引：0，他引：1
ＣＬＡＳＳＮＵＭＢＥＲＧ２５８．９４军队院校图书馆文献信息数字化建设的主要任务是以已经建立的“军酚院校图书馆信息网络系统”的局城网为基础,开发“文献信息服务系统”和“定题信息检索系统”两重点应用系统,以文献信息资源的共享为目的,实现全军院校图书馆的联... 相似文献