知识经济学的学科构建研究(上)     

肖勇 《情报理论与实践》2005,28(1):6-9

知识经济学是以知识经济为研究对象的一门面向 2 1世纪的新兴学科。本文对知识经济学的学科构建问题进行了探讨 ,指出知识经济学有狭义与广义之分 ,其中广义知识经济学可以划分为理论知识经济学、应用知识经济学和实践知识经济学三个部分。  相似文献   

Effects of short-term hormone replacement on atherogenic indices in Indian postmenopausal women     

Sarika Arora  Anju Jain  R Chitra 《Indian journal of clinical biochemistry : IJCB》2006,21(1):41-47

Indian ethnicity by itself is a strong risk factor for development of CAD in Indian postmenopausal women due to lower HDL levels as compared to Whites and women of oriental origin. We evaluated and compared the short-term effects of menopause, estrogen replacement therapy and combined estrogen and progestin replacement therapy on various atherogenic indices. 40 postmenopausal women, both surgical and natural (20 each) were selected. 10 surgical postmenopausal women were given 0.625 mg conjugated estrogens daily for 6 months and 10 natural postmenopausal women were given 0.625 mg conjugated estrogen with 2.5 mg medroxyprogesterone acetate daily. 20 women were included in the control group and given placebo. Fasting venous blood samples were analyzed for extended lipid profile and calculated atherogenic indices before starting the therapy and after 1,3 and 6 months. LDL and Apolipoprotein B increased (p<0.05) and those of Apolipoprotein A1 and HDL decreased in the control groups. In both the study groups levels of serum cholesterol and LDL decreased (p<0.05) and those of HDL and Apolipoprotein A1 increased (p<0.01). LDL/HDL, Apo B/ApoA1, Total Cholesterol/HDL decreased significantly (p<0.05) in both the study groups compared to the control groups. The effect of estrogen alone was more significant as compared to combination therapy. Log Triglycerides (TG)/HDL ratio showed a decrease in women on estrogen alone but the difference was not significant. Our study confirms that short term HRT has a favorable effect on atherogenic indices in Indian postmenopausal women.  相似文献   

Study on arsenic level in public water supply of Delhi using hydride generator accessory coupled with atomic absorption spectrophotometer   总被引：1，自引：0，他引：1  

Sanjeev Lalwani  T. D. Dogra  D. N. Bhardwaj  R. K. Sharma  O. P. Murty 《Indian journal of clinical biochemistry : IJCB》2006,21(1):70-76

Exposure to arsenic has been associated with several health hazards. Worldwide the main reason for chronic human intoxication with arsenic is intake of contaminated drinking water. Air acetylene type of atomic absorption spectrophotometer in combination with hydride generator accessory was used to analyze arsenic level in 25 water samples collected from 25 booster pumping stations and 313 water samples collected from tap water supply of 62 areas of Delhi. Results were analyzed using SPSS and Barlett’s Chi Square Test. Mean arsenic level detected in water samples collected from booster pumping stations was 0.00976 ppm (Range 0.000–0.017 ppm, Standard Deviation 0.006 and Standard error of Mean 0.00118). Maximum arsenic level (0.017 ppm) was found in water samples of booster pumping stations of Mehrauli, Punjabi Bagh and Ramjas Road. Mean arsenic level detected in samples collected from tap water supply was 0.013 ppm (Range 0–0.0430 ppm, Standard Deviation 0.00911 and Standard error of Mean 0.000515). In water samples of 42 areas arsenic level detected was exceeding WHO/EPA permissible limit of 0.01 ppm (10 ppb). The mean arsenic level detected in water samples of booster pumping station was within WHO/EPA permissible limit while mean arsenic level detected in tap water samples was marginally higher. Mixing of ground water and contamination through broken or leaking channel could be the possible reason of higher arsenic level in tap water. Continuous monitoring of quality of drinking water is required particularly in view of water contamination caused by industrial waste and uncontrolled ground water extraction.  相似文献   

数字图书馆资源格式选择分析   总被引：2，自引：0，他引：2  

李睿 《情报理论与实践》2003,26(3):283-284

网络经济时代 ,以数字技术为支柱、以互联网为平台 ,为人们提供开放、智能信息服务的数字图书馆方兴未艾。而建设一个优秀的数字图书馆 ,不仅要依靠一个功能强大的数字图书馆系统 ,更需要以丰富的高质量的e Book(电子书 )作为其资源基础。本文将从数字图书馆资源建设过程中的e Book格式选择方面 ,讨论建设数字图书馆资源的关键问题。当前的e Book格式有多种 ,国际上最盛行的e Book格式有两种 :OEB (Opene BookPublicationStructure 1 0 )和PDF (PortableDocumentFormat) ,另外还有今年才出现的EBX格式 ,以及我国国内推出的CEB格式…  相似文献   

信息构建体系及其在专业资源网站建设中的应用   总被引：3，自引：1，他引：3  

黄文 《情报理论与实践》2005,28(5):530-532

本文就信息构建体系的概念、内涵以及对信息组织的影响进行简要的说明和分析,并结合所从事的数字资源整合建设方面的实践,探讨信息构建体系在生物医学专业资源网站建设中的作用和应用模式。  相似文献   

关于情报学理论研究现状一些基本问题的探讨   总被引：8，自引：0，他引：8  

王松俊  霍忠文 《情报理论与实践》2004,27(1):15-16

探讨了科技情报工作的本质特性和创造性，阐述了科技情报学科的独立性，指出科技情报工作实践呼唤科技情报工作理论建设，最后，阐述了对科技情报学研究方法的认识。  相似文献   

中国农业:报酬递增与"剩余之谜"     

刘金山 《未来与发展》2007,(6):25-28

本文在综述我国农业增长"剩余之谜"研究基础上,从报酬递增角度考察农业发展,分析我国农业报酬递增的源泉,探讨农业发展中的逆报酬递增行为,最后提出实现农业报酬递增的政策含义。  相似文献   

DAFS及其相关技术研究     

秦利 《情报理论与实践》2003,26(2):170-172

随着数字信息资源的快速增长 ,数字化技术、数字图书馆技术的成熟 ,数字图书馆建设的物质基础日趋成熟。建立数字图书馆的目的就是为了更好地为用户服务 ,但作为数字图书馆组成部分的存储系统 ,如果采用传统的存储体系 ,将会阻碍信息的快速服务。存储网络能够提供可扩展的、高性能的数据管理 ,同时用户的总费用很低 ,所以存储网络受到众多用户的青睐。存储网络技术一定程度地缓解了存储的压力 ,但是 ,主机ＣＰＵ的负荷并没有得到丝毫减轻 ,尤其是在运行多媒体应用和资源敏感数据库时 ,系统的开销极大地增加了访问数据的延迟 ,而成为新的瓶颈…  相似文献   

论知识管理和信息构建   总被引：37，自引：1，他引：37  

张新民  梁战平 《情报理论与实践》2003,26(5):400-405

The paper outlines the concept and implementation process of knowledge management, introduces a new domain of study in information science, that is, the concept, composition and process of information architecture, and explores the relationship between knowledge aumagement and information architecture.  相似文献   

极限组织的概念、框架与网络化生存     

卢致杰  覃正 《软科学》2005,19(1):1-4,8

首先研究了组织理论在发展过程中遇到的新问题,而后运用信息技术对组织理论进行拓展,建立了网络环境下超越时间与空间限制的极限组织理论框架体系,描述了极限组织构架的“轻量级”实现方法以及“点击熵”知识的获取过程;最后分析极限组织的网络化生存战略。  相似文献