3G时代的数字图书馆移动信息服务方式研究

文章介绍3G时代数字图书馆移动信息服务的优势,探讨数字图书馆在3G时代呈现的移动信息服务方式。详细阐述各种移动信息服务方式及其特点,以便拓宽数字图书馆在3G时代的移动信息服务领域,完善和创新各种信息服务方式,充分发挥数字图书馆移动信息服务功能,提高用户满意度。     

Conveying quality and value in emerging industries: Star scientists and the role of signals in biotechnology

This paper addresses the role that scientific status plays in initial public offerings of technology focused firms. The paper builds on the literature of the sociology of science as well as the work of Spence (1974) and Podolny (1993) and argues that the presence of a Nobel laureate affiliated with a firm making an IPO provides a signal of firm quality to potential investors. Moreover, and building on the work of Podolny and Scott Morton (1999) and Stuart et al. (1999) we hypothesize that the importance of status diminishes as other measures of firm quality become available. We test our hypothesis for two periods of initial public offerings in biotechnology. We document that there is a clear difference in “maturity” of the firms across the two windows on a number of metrics. Consistent with our hypothesis that Nobel laureates play an important role as a non-financial signal of firm quality, we find that first-window firms with a Nobel laureate affiliate realize greater IPO proceeds in the amount of $24 million. In the second window the amount of money raised is not significantly different between Nobel and non-Nobel firms. This finding is consistent with the signaling literature that argues that the importance of a signal is inversely related to the availability of cogent information on firm quality. Consistent with this view, we also find a change between the two windows in the importance of other non-financial metrics used to convey value. Our research is one of the first to examine the dynamic nature of signals. Because we are unable to distinguish the extent to which the reduction in uncertainty at the firm level is correlated with the reduction of uncertainty at the industry level, the question remains as to the extent to which the diminished importance of signals in our second period is due to a change in market uncertainty versus a change in firm uncertainty.     

新兴技术生命周期中的“峡谷”跨越——3G技术的市场发展研究

 基于技术采用生命周期研究中的技术“峡谷”概念及特征,以及“峡谷”跨越的相关理论,对通过官方统计及问卷调查获取的数据进行分析,论证我国3G技术在目前的市场应用过程中正面临着“峡谷”跨越问题,并通过对3G技术潜在使用者的心理特征的分析,说明他们与“峡谷”对岸的消费者——实用主义者相一致,跨越3G技术“峡谷”的关键是找准实用主义者心理特征的影响因素并制定相应策略,在此基础上为电信企业提出了对策建议,以期为3G技术的市场发展提供参考借鉴。     

基于文献计量指标的关键技术的探寻——以第三代移动通信技术为例

移动通信技术领域的专利文献在移动通信关键技术的研发和创新中具有不可替代的作用,笔者以德温特专利数据库中1994-2009年的16 759项第三代移动通信技术专利作为研究对象,提取专利文献中的德温特专利手工代码,运用CiteSpace可视化软件,在构建频数、中介中心性、激增指数和Σ四个主要指标分析的基础上,对第三代移动通信技术专利的手工代码进行计量分析,直观展示了不同时段第三代移动通信技术领域的关键技术。     

H指数和G指数在专利权人评价中的实证研究——以电通信中“数字信息的传输”技术为例

专利,作为集技术情报、经济情报、商业情报等于一体的知识载体,在分析高技术企业的技术水平方面有重要的作用。在前人将H指数应用于专利权人分析的基础上,进一步将G指数移植到专利权人的评价中,并对源于德温特专利数据库的2001-2010年的电通信技术中的数字信息的传输中的相关专利权人,进行了比较。通过专利量、H指数和G指数的分析,本文发现日、韩和我国的部分企业在专利量方面有优异的表现,然而在H指数和G指数所显示的技术实力方面,却远不如美国、欧洲的高科技企业。     

3G时代的手机图书馆

论文分析3G环境下建立手机图书馆的可行性,介绍国内手机图书馆的发展状况,详谈图书馆利用3G技术和手机开展的新型服务,最后提出构建手机图书馆的问题与对策.     

基于3G智能手机的移动学习系统化设计模式构建

移动学习具有便捷性、高效性、情境性、交互丰富等特点,且3G智能手机为移动学习提供了良好的物质基础和应用环境,因此构建由需求分析、目标确定、学习者特征分析、障碍因素分析、活动任务设计、学习场景设计、学习支持设计、学习评价设计、反馈修改等9个环节组成的系统化学习设计模式,能有效地指导移动学习的开展。     

一种基于J2ME的手机视频监控系统

手机视频监控系统伴随着3G的兴起有着广阔的发展空间,随时随地的视频监控也能方便人们的工作和生活。通过研究视频监控相关方面的关键技术,设计了一种基于J2ME的手机视频监控系统,然后实现了该系统的视频服务器的搭建,实现了Web端的服务器管理功能并进行了手机客户端实时视频监控的测试,达到了设计的要求。     

试析第16届亚运会门票定价问题——基于大型综合赛事门票定价体系的计量模型分析

第16届广州亚运会在历时16天的赛程结束后,于2010年11月27日圆满闭幕,这是继奥运会后我国首次再度举办的超大型综合赛事。赛事票价作为赛事收入的重要组成部分与消费者息息相关,向来是关注的热点。而在前期,公众对官方公布的比北京奥运会还要高的广州亚运会开闭幕式门票有所质疑。运用统计调研、计量分析并综合以往研究结论,对这一高票价现象进行多方面的经验论证及实证分析,解释广州亚运会高票价的原因及合理性,对于赛事定价的研究结论也可为今后的大型综合赛事定价提供参考。     

Distribution of Methionine Synthase Reductase (MTRR) Gene A66G Polymorphism in Indian Population

Methionine synthase reductase (MTRR) is an important enzyme of the folate/homocysteine pathway. It is responsible for regulation of methionine enzyme by reductive methylation. A common variant A66G is reported in the FMN-binding domain of the MTRR gene, which leads to substitution of isoleucine by methionine (I22M) in MTRR enzyme with reduced activity. Reduced catalytic activity of enzyme leads to high homocysteine concentration in blood and increases risk for numerous diseases. The frequency of A66G polymorphism varies in different ethnic groups. The present study has been designed to evaluate the frequency of MTRR A66G gene polymorphism in the Eastern UP population by PCR–RFLP method. Along with this we also performed a meta-analysis to evaluate the global prevalence of this polymorphism. Databases were screened to identified the eligible studies. The prevalence of the G allele and GG genotype was determined by the use of prevalence proportion with 95% CI. Open meta-analyst software was used for the meta-analysis. Total 1000 blood samples were analyzed, the frequencies of A and G alleles were 0.35 and 0.65 respectively. Meta-analysis results revealed that the prevalence of G allele and GG genotype were 49.4% (95% CI 40.6–58.1, p ≤ 0.001) and 24.3% (95% CI 17.8–30.9, p ≤ 0.001) respectively. In sub-group meta-analysis, the lowest frequency of G allele was found in South America (32.7%; 95% CI 14.1–51.3, p ≤ 0.001), and highest in Asia (56.4%; 95% CI 39.5–73.3, p ≤ 0.001). The results of the meta-analysis showed that the Asian population has the highest frequency of G allele and highest frequency of the GG genotype was found in the European population.