共查询到20条相似文献，搜索用时 15 毫秒
1.
Query recommendation has long been considered a key feature of search engines, which can improve users’ search experience by providing useful query suggestions for their search tasks. Most existing approaches on query recommendation aim to recommend relevant queries, i.e., alternative queries similar to a user’s initial query. However, the ultimate goal of query recommendation is to assist users to reformulate queries so that they can accomplish their search task successfully and quickly. Only considering relevance in query recommendation is apparently not directly toward this goal. In this paper, we argue that it is more important to directly recommend queries with high utility, i.e., queries that can better satisfy users’ information needs. For this purpose, we attempt to infer query utility from users’ sequential search behaviors recorded in their search sessions. Specifically, we propose a dynamic Bayesian network, referred as Query Utility Model (QUM), to capture query utility by simultaneously modeling users’ reformulation and click behaviors. We then recommend queries with high utility to help users better accomplish their search tasks. We empirically evaluated the performance of our approach on a publicly released query log by comparing with the state-of-the-art methods. The experimental results show that, by recommending high utility queries, our approach is far more effective in helping users find relevant search results and thus satisfying their information needs. 相似文献
2.
《图书馆管理杂志》2013,53(3-4):351-378
Summary The objective of this article is to examine some of the valuable philosophical resources available on the Internet, especially for librarians who need to determine what resources to provide to faculty, students, and staff. Some main uses of the Internet for philosophical research are: accessing texts, using search strategies to examine the texts, reading and writing electronic journal articles, accessing information from encyclopedias and dictionaries, browsing through paths of interlinked Web sites, searching the Internet for sources, and participating in online discussion forums. This article examines the Internet as a source of primary and secondary texts, journal literature, research databases, reference works, specialized limited area search engines, organizational information, and discussion lists. The article ends with a philosophical reflection on the transformative effect of information technology on the growth of knowledge. 相似文献
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Michelle Fetherston 《Journal of Applied Communication Research》2013,41(3):322-323
Issues with unemployment, underemployment, and inadequate preparation have raised concerns about what colleges are doing to ready students for post-graduate careers, but little discussion exists regarding students’ roles in the process. Students play active roles in the anticipatory socialization process, so this study examines the factors that influence college students to seek career information from the Internet, using the comprehensive model of information seeking (CMIS) as a framework. Results demonstrated a good fit to the model, with Internet experience exerting the strongest influence on participants’ Internet self-efficacy, perceptions of information source quality, and, in turn, perceptions of information source usefulness and information seeking intentions. However, several proposed paths were not significant, suggesting the need for replication studies and further research. Results provide theoretical support for the CMIS as a viable framework beyond health information seeking and identify multiple practical applications and opportunities for future research on career information seeking. 相似文献
4.
Query suggestion, which enables the user to revise a query with a single click, has become one of the most fundamental features of Web search engines. However, it has not been clear what circumstances cause the user to turn to query suggestion. In order to investigate when and how the user uses query suggestion, we analyzed three kinds of data sets obtained from a major commercial Web search engine, comprising approximately 126 million unique queries, 876 million query suggestions and 306 million action patterns of users. Our analysis shows that query suggestions are often used (1) when the original query is a rare query, (2) when the original query is a single-term query, (3) when query suggestions are unambiguous, (4) when query suggestions are generalizations or error corrections of the original query, and (5) after the user has clicked on several URLs in the first search result page. Our results suggest that search engines should provide better assistance especially when rare or single-term queries are input, and that they should dynamically provide query suggestions according to the searcher’s current state. 相似文献
5.
《Library & information science research》2002,24(1):17-29
This study uses in-depth qualitative interviews to explore the information seeking behavior of 25 mature undergraduates at one Canadian university. It explores the complex interweaving of these students’ everyday and academic information needs in light of Reijo Savolainen’s framework for the study of everyday life information seeking. Findings include the role of social and cultural capital in these students’ information seeking, the diverse ways that everyday and academic contexts inform one another, and the importance of not separating the everyday from other life situations in studies of individuals’ information behaviors. 相似文献
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Dustin Hillard Eren Manavoglu Hema Raghavan Chris Leggetter Erick Cantú-Paz Rukmini Iyer 《Information Retrieval》2011,14(3):315-336
The critical task of predicting clicks on search advertisements is typically addressed by learning from historical click data.
When enough history is observed for a given query-ad pair, future clicks can be accurately modeled. However, based on the
empirical distribution of queries, sufficient historical information is unavailable for many query-ad pairs. The sparsity
of data for new and rare queries makes it difficult to accurately estimate clicks for a significant portion of typical search
engine traffic. In this paper we provide analysis to motivate modeling approaches that can reduce the sparsity of the large
space of user search queries. We then propose methods to improve click and relevance models for sponsored search by mining
click behavior for partial user queries. We aggregate click history for individual query words, as well as for phrases extracted
with a CRF model. The new models show significant improvement in clicks and revenue compared to state-of-the-art baselines
trained on several months of query logs. Results are reported on live traffic of a commercial search engine, in addition to
results from offline evaluation. 相似文献
9.
Valérie Spezi 《New Review of Academic Librarianship》2016,22(1):78-106
The advent of the Internet and networked communications in the last 15 years has arguably considerably changed the information behaviors of doctoral students, including the discovery process. Information seeking includes initiating a search, constructing search strategies, and locating and evaluating the identified sources. Current research on information-seeking behaviors is focusing on understanding how the Internet, social media, and other technological and communication-based changes, including mobile technologies, have changed the way students seek information in order to understand the information behaviors of the students of tomorrow. This article offers a review of the literature on information-seeking behaviors, with a particular focus on recent years (2010–2015). It aims to determine whether notable changes in the information-seeking behavior of doctoral students have emerged in recent years. The study shows that the information-seeking behaviors of doctoral students follow a steady trend, with some subtle changes, particularly in the (patchy) use of social media and networking sites. There appears to be more similarities than differences across disciplines in the information-seeking behaviors of doctoral students. Considerations to their information literacy skills are given to understand better the role supervisors and library staff can play to support the doctoral students population in the early stages of the research process. 相似文献
10.
高校大学生手机阅读行为调查分析 总被引：5，自引：1，他引：4
从手机阅读需求、手机读物寻求和手机阅读利用行为等方面对胶东地区部分高校在校大学生的手机阅读行为进行抽样调查,分析、总结大学生手机阅读行为的现状与特征,提出手机阅读服务机构应针对大学生用户的需求与行为特征提供手机阅读服务。 相似文献
11.
[目的/意义] 探析硕士研究生网络学术信息查寻行为中的情绪作用机制，以深化信息查寻行为中情绪问题的研究。[方法/过程] 通过半结构化访谈法，收集网络环境下25位硕士研究生学术信息查寻活动的相关数据，使用三级编码对质性数据进行分析，提炼其信息查寻行为中的情绪特征与行为特征。[结果/结论] 硕士研究生在网络学术信息查寻行为过程中会产生不同类型的情绪效价和情绪唤醒度，前者包括积极情绪、中性情绪和消极情绪，后者包括高唤醒度、中唤醒度和低唤醒度；情绪效价与情绪唤醒度将引发不同类型的积极行为与消极行为。 相似文献
12.
Xiaojie Duan 《International Information and Library Review》2013,45(3):157-168
ABSTRACTAmerica has become a choice for international students to study abroad because of its advanced education system and environment. Libraries become a way for international students to access resources and experience campus life, while Chinese students are increasing gradually as the biggest component of international students. This article investigates how Chinese students use American academic libraries and their information needs and seeking behaviors, as well as Chinese students' satisfaction with library facilities, resources, and services, and their expectation for other services. The article aims to better understand Chinese students, analyze their search strategies, and better provide relevant library services for them. 相似文献
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This study investigates distance learners' information literacy skills in using digital library resources and the factors (online learning and information manipulation) that correlate with learners' information seeking self-efficacy. In addition, distance learners' preferences with regard to digital resources selection and interests of developing information seeking skills were examined. 3517 students enrolled in one or more distance education courses were invited to participate in the online survey; 219 students completed the survey, for a response rate of 6.2%. The results revealed that distance learners who have higher self-efficacy for information seeking and proficiency in information manipulation exhibited higher self-efficacy for online learning. Moreover, students with high self-efficacy demonstrated superior knowledge of digital resources selection. Students who have low self-efficacy with regard to information seeking were more likely to express interest in learning how to use the library resources, although learning techniques for database searching was the exception. 相似文献
14.
交互式跨语言信息检索是信息检索的一个重要分支。在分析交互式跨语言信息检索过程、评价指标、用户行为进展等理论研究基础上,设计一个让用户参与跨语言信息检索全过程的用户检索实验。实验结果表明:用户检索词主要来自检索主题的标题;用户判断文档相关性的准确率较高;目标语言文档全文、译文摘要、译文全文都是用户认可的判断依据;翻译优化方法以及翻译优化与查询扩展的结合方法在用户交互环境下非常有效;用户对于反馈后的翻译仍然愿意做进一步选择;用户对于与跨语言信息检索系统进行交互是有需求并认可的。用户行为分析有助于指导交互式跨语言信息检索系统的设计与实践。 相似文献
15.
This study investigates the information seeking behavior of general Korean Web users. The data from transaction logs of selected dates from August 2006 to August 2007 were used to examine characteristics of Web queries and to analyze click logs that consist of a collection of documents that users clicked and viewed for each query. Changes in search topics are explored for NAVER users from 2003/2004 to 2006/2007. Patterns involving spelling errors and queries in foreign languages are also investigated. Search behaviors of Korean Web users are compared to those of the United States and other countries. The results show that entertainment is the topranked category, followed by shopping, education, games, and computer/Internet. Search topics changed from computer/Internet to entertainment and shopping from 2003/2004 to 2006/2007 in Korea. The ratios of both spelling errors and queries in foreign languages are low. This study reveals differences for search topics among different regions of the world. The results suggest that the analysis of click logs allows for the reduction of unknown or unidentifiable queries by providing actual data on user behaviors and their probable underlying information needs. The implications for system designers and Web content providers are discussed. 相似文献
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重大突发公共卫生事件中公众信息搜寻行为影响因素探究 总被引：2，自引：1，他引：1
[目的/意义] 在重大突发公共卫生事件中,公众对于相关信息需求旺盛,信息搜寻成为公众了解和应对风险的重要途径。面对风险信息,公众对信息搜寻的态度如何塑造其行为？哪些因素会影响公众信息搜寻态度与行为？不同人群间是否具有差异性？解答这些问题有助于为公众提供针对性的信息服务、助力提升个体应对效能、开展有效防疫工作。[方法/过程] 以在线问卷形式调查国内719名受访者,探究重大突发公共卫生事件中影响公众信息搜寻态度与行为的因素。[结果/结论] 研究表明：不同地区、年龄、学历的公众信息搜寻态度与行为具有显著差异;感知风险、情感反应、信息充分性、信息主观规范与知觉行为控制正向影响公众信息搜寻态度与行为;信息搜寻态度在各因素与信息搜寻行为间起中介作用。基于研究结果,分别从信息发布渠道、信息传播过程与信息搜索平台等角度提出意见。 相似文献
17.
Peer teaching and information retrieval: the role of the NICE Evidence search student champion scheme in enhancing students’ confidence 
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下载免费PDF全文 Laura Sbaffi Elaine Hallsworth Anne Weist 《Health information and libraries journal》2018,35(1):50-63
Background
This research reports on the NICE Evidence search (ES) student champion scheme (SCS) first five years of activity (2011–2016) in terms of its impact on health care undergraduate students’ information search skills and search confidence.Objectives
A review of students’ evaluation of the scheme was carried out to chart the changes in attitude towards NICE Evidence search as an online health care information source and to monitor students’ approach to information seeking.Methods
This study is based on the results of questionnaires distributed to students before and after attending a training session on NICE Evidence search delivered by their own peers. The exercise was implemented in health related universities in England over a period of five consecutive academic years.Results
(i) Students’ search confidence improved considerably after the training; (ii) ES was perceived as being an increasingly useful resource of evidence based information for their studies; (iii) the training helped students develop discerning search skills and use evidence based information sources more consistently and critically.Conclusions
The NICE SCS improves confidence in approaching information tasks amongst health care undergraduate students. Future developments could involve offering the training at the onset of a course of study and adopting online delivery formats to expand its geographical reach. 相似文献18.
青少年网络信息查询行为影响因素实证分析 总被引：2，自引：0，他引：2
采用实证研究方法,对青少年的认知风格、年级和任务类型因素对其网络信息查询效果和具体查询行为的影响进行探究。结果表明,青少年所在的年级和任务类型对其查询效果和行为有较大影响,高中生的表现整体较初中生好,完成不同任务时青少年的信息行为有较大差异;认知风格仅对点击网页内超链接次数有所影响。 相似文献
19.
Reijo Savolainen 《Library & information science research》2011,33(1):73-79
The study examines the extent to which blogs are used as interactive forums in which people can ask and share information. These activities were investigated as constituents of interaction taking place in blogs. The study draws on the analysis of the postings and comments submitted to eight Finnish blogs on slimming issues. The data were examined using the category system of Interaction Process Analysis. The findings indicate that blogs provide emotionally supportive forums that mainly serve the ends of sharing information and opinion. In contrast, blogs are seldom used for articulating information needs and seeking for information. 相似文献
20.
Muhammad Asif Naveed 《International Information and Library Review》2017,49(4):266-273
This research aims to provide an analytic and critical review of research on information seeking anxiety (ISA) with a view to inform the information professionals, especially those engaged in information literacy instructions about the existing situation. This study established the background of the proposed phenomenon, provided integrated analysis of the available research, and discussed the theoretical and practical implications of ISA on information services, especially information literacy instruction. Although the results from previous studies were not comparable, directly due to varied geographical contexts and research methods, it was nevertheless possible to draw some common conclusions regarding the users’ anxiety related to information seeking tasks. This review overwhelmingly indicated the manifestation and prevalence of ISA among students in the digital environment. Some personal and academics variables of students appear to be correlated with ISA. The results of reviewed studies indicated the necessity for a need-based information literacy curriculum for alleviation of anxiety related to students’ information-seeking tasks. 相似文献