Cyberstalking, personal privacy, and moral responsibility

This essay examines some ethical aspects of stalkingincidents in cyberspace. Particular attention is focused on the Amy Boyer/Liam Youens case of cyberstalking, which has raised a number of controversial ethical questions. We limit our analysis to three issues involving this particular case. First, we suggest that the privacy of stalking victims is threatened because of the unrestricted access to on-linepersonal information, including on-line public records, currently available to stalkers. Second, we consider issues involving moral responsibility and legal liability for Internet service providers (ISPs) when stalking crimesoccur in their `space' on the Internet. Finally, we examine issues of moral responsibility for ordinary Internet users to determine whether they are obligated to inform persons whom they discover to be the targets of cyberstalkers.     

The effectiveness of Web search engines for retrieving relevant ecommerce links

Ecommerce is developing into a fast-growing channel for new business, so a strong presence in this domain could prove essential to the success of numerous commercial organizations. However, there is little research examining ecommerce at the individual customer level, particularly on the success of everyday ecommerce searches. This is critical for the continued success of online commerce. The purpose of this research is to evaluate the effectiveness of search engines in the retrieval of relevant ecommerce links. The study examines the effectiveness of five different types of search engines in response to ecommerce queries by comparing the engines’ quality of ecommerce links using topical relevancy ratings. This research employs 100 ecommerce queries, five major search engines, and more than 3540 Web links. The findings indicate that links retrieved using an ecommerce search engine are significantly better than those obtained from most other engines types but do not significantly differ from links obtained from a Web directory service. We discuss the implications for Web system design and ecommerce marketing campaigns.     

蛇床子超临界CO2萃取成分GC-MS分析

以乙醚为改性剂,采用超临界CO2萃取法提取中药蛇床子的有效成分,并用GC／MS法对其化学成分和相对含量进行了分析．结果表明,与水蒸气蒸馏法比较,超临界CO2萃取法的产率较高,总萃取率为8．46％(w),蒸馏法提取蛇床子挥发油的产率较低,仅为1．01％(w);蛇床子超临界萃取物中香豆素类的相对含量约为67．63％,其蛇床子素相对含量占总香豆素的78．92％,而蒸馏法提取的挥发油中鉴定出一种香豆素成分,其相对含量仅为1．65％．因此,超临界CO2萃取法可以有效提取中药蛇床子的多种香豆素类成分,其方法为其他同类中药的开发和药学鉴定提供了参考依据．     

Information navigation on the web by clustering and summarizing query results

We report our experience with a novel approach to interactive information seeking that is grounded in the idea of summarizing query results through automated document clustering. We went through a complete system development and evaluation cycle: designing the algorithms and interface for our prototype, implementing them and testing with human users. Our prototype acted as an intermediate layer between the user and a commercial Internet search engine (AltaVista), thus allowing searches of the significant portion of World Wide Web. In our final evaluation, we processed data from 36 users and concluded that our prototype improved search performance over using the same search engine (AltaVista) directly. We also analyzed effects of various related demographic and task related parameters.     

毛泡桐花挥发油的提取

目的 从毛泡桐花中提取挥发油。方法 水蒸气蒸馏法。结果 从毛泡桐花中提得挥发油，得率为1．6％。结论 毛泡桐花中含有较丰富的挥发油。     

Deconstructing Google Dataset Search

This essay examines the beta tool from Google, Google Dataset Search. The Google Dataset Search, announced in September 2018, is a search engine specific to finding research data published on the internet. The structure and methods of the search engine are examined, as well as the methods Google recommends to web developers to make it an effective tool across the World Wide Web. The column concludes with a discussion of the pros and cons of this tool in the research information landscape.     

学术隐蔽资源的采集、评价与整合

介绍隐蔽网络和学术隐蔽资源的基本情况,提出查找学术隐蔽资源的核心是找到相关的数据库。探讨如何较为系统的使用辅助工具查找隐蔽网络数据库的方法和策略,以改善用户搜索隐蔽学术资源的策略。对采集后的隐蔽网络资源进行评价、加工和整合,将其纳入到数字图书馆集成化服务大家庭中。     

稠油油田蒸汽吞吐热采参数的正交设计

蒸汽吞吐热采是稠油热力开采的主要方式.由于稠油油田地质情况的差异,注汽参数必然不可能一样,本文根据某稠油油田提供的有关资料,对其注汽参数进行正交设计,并通过方差分析,获得最佳施工方案.     

气液相变中的饱和蒸气问题

气液相变中的饱和蒸气问题涉及到对一些概念的理解和对物理现象发生时相关条件的把握。     

Universal Digital Library—— Future research directions

INTRODUCTION The stunning growth in storage technology prompted Prof. Raj Reddy of Carnegie Mellon University to envision that it would be possible to store in digital form, in the very near future, all knowledge ever acquired by the human race. As part of this grandiose vision and as a first step, in realizing this vision, it was proposed to create the Digital Library with a free-to-read, searchable collection of one million books, predominantly in Indian languages, available to every…