Location extraction from tweets     

Thi Bich Ngoc Hoang  Josiane Mothe 《Information processing & management》2018,54(2):129-144

Five hundred million tweets are posted daily, making Twitter a major social media platform from which topical information on events can be extracted. These events are represented by three main dimensions: time, location and entity-related information. The focus of this paper is location, which is an essential dimension for geo-spatial applications, either when helping rescue operations during a disaster or when used for contextual recommendations. While the first type of application needs high recall, the second is more precision-oriented. This paper studies the recall/precision trade-off, combining different methods to extract locations. In the context of short posts, applying tools that have been developed for natural language is not sufficient given the nature of tweets which are generally too short to be linguistically correct. Also bearing in mind the high number of posts that need to be handled, we hypothesize that predicting whether a post contains a location or not could make the location extractors more focused and thus more effective. We introduce a model to predict whether a tweet contains a location or not and show that location prediction is a useful pre-processing step for location extraction. We define a number of new tweet features and we conduct an intensive evaluation. Our findings are that (1) combining existing location extraction tools is effective for precision-oriented or recall-oriented results, (2) enriching tweet representation is effective for predicting whether a tweet contains a location or not, (3) words appearing in a geography gazetteer and the occurrence of a preposition just before a proper noun are the two most important features for predicting the occurrence of a location in tweets, and (4) the accuracy of location extraction improves when it is possible to predict that there is a location in a tweet.  相似文献   

Questioner or question: Predicting the response rate in social question and answering on Sina Weibo     

Bernard J. Jansen 《Information processing & management》2018,54(2):159-174

With the noted popularity of social networking sites, people increasingly rely on these social networks to address their information needs. Although social question and answering is potentially an important venue seeking information online, it, unfortunately, suffers from a problem of low response rate, with the majority of questions receiving no response. To understand why the response rate of social question and answering is low and hopefully to increase it in the future, this research analyzes extrinsic factors that may influence the response probability of questions posted on Sina Weibo. We propose 17 influential factors from 2 different perspectives: the content of the question, and the characteristics of the questioner. We also train a prediction model to forecast a question's likelihood of being responded based on the proposed features We test our predictive model on more than 60,000 real-world questions posted on Weibo, which generate more than 600,000 responses. Findings show that a Weibo's question answerability is primarily contingent on the questioner versus the question. Our findings indicate that using appreciation emojis can increase a question's response probability, whereas the use of hashtags negatively influences the chances of receiving answers. Our contribution is in providing insights for the design and development of future social question and answering tools, as well as for enhancing social network users’ collaboration in supporting social information seeking activities.  相似文献   

国外智慧城市视阈下的数字档案研究热点概览     

刘坤锋  庞宇飞  郑雪丽  刘永 《档案管理》2020,(3):101-103

本文对国外智慧城市视阈下的数字档案研究热点文献进行梳理,介绍了数字档案检索优化服务、数字档案交互性和可视化服务、数据开放与用户参与以及智慧城市专项数字档案处理等方面的理论和应用研究成果。这些研究在面向需求、技术应用和专项融合等方面较为深入且操作性较强,具有借鉴意义。  相似文献   

个性服务视域下的高校档案数据库建设     

沙敏 《档案管理》2020,(3):115-116

本文通过研究当前高校档案管理的重要性,结合实际的档案需求情况,分析了档案专题数据库基本的几种类型,来满足高校群体对档案信息的个性化需求,并通过对档案专题数据库模式的分析,制定了具体的应用措施,以便能够为相关人员提供信息参考。  相似文献   

数字图书馆信息服务的融合与创新——基于2019年JCDL年会论文的综述     

梁少博  吴丹 《图书情报知识》2020,(3):97-108

[目的/意义]本文通过对2019年国际数字图书馆联合会议(Joint Conference on Digital Library,JCDL)的录用论文进行整体回顾,梳理了本届年会的最新研究成果与学科发展动态,以助国内图情领域学者更好地了解本届年会成果,把握国际数字图书馆领域研究的前沿热点问题。[研究设计/方法]采用文献综述的方法进行研究。[结论/发现]本届年会更加关注数字图书馆如何通过多源数据的融合、数字人文馆藏资源的利用等实现信息服务深度融合;数字图书馆如何通过海量大数据挖掘与利用、用户行为分析提升其服务水平;如何通过对学术文本资源深入挖掘,实现信息计量学在学术评审、学术评价等方面的创新应用。[创新/价值]本文揭示了国际数字图书馆领域的最新发展态势,展望了未来数字图书馆领域的学术前沿方向。  相似文献   

What does it take to become “one of us?” Redefining ethnic-civic citizenship using markers of everyday nationhood     

《Int J Intercult Relat》2020

In this study we examined what are the markers of immigrant naturalisation as seen from the perspectives of recipient nationals. Social markers are perceptual signposts that receiving nationals use in deciding whether a non-native born is a member of the destination country. In short, what should immigrants do in order to be accepted by receiving nationals as “one of us”. Cross national data on 20 indicators of “everyday nationhood” were collected from five countries – Singapore, Japan, Australia, Finland, and Canada. The markers highlight common dispositions, activities, or social norms that are associated with citizenship. Exploratory factor analysis in each sample consistently demonstrated a two-factor structure model that supports the contemporary ethnic-civic distinction, but the markers that make up each of the two dimensions vary between countries. No metric equivalence was found, and that the markers have culture-specific meanings. The framework offers a novel insight to intercultural relations. The results suggest that adaptation and social inclusion need to consider the norms and values practised in the recipient society, and how immigration may redefine intergroup boundaries.  相似文献   

Platform-based customer agility: An integrated framework of information management structure,capability, and culture     

《International Journal of Information Management》2021

Platform-based customer agility is the ability to leverage the voice of the customer on a platform to achieve market intelligence and to explore competitive action opportunities. Prior studies have indicated the critical role of customer agility in enabling the survival and prosperity of contemporary organizations in a turbulent business environment, although how to develop this capability is not answered. The current research attempts to fill this theoretical gap. Drawing on the information management literature, we propose an integrative information management framework to investigate the process of developing customer agility. By conducting a case study of a leading e-commerce platform in China, we identify three types of platform-based customer agility (i.e. reactive customer agility, proactive customer agility, and coactive customer agility) in different phases of the growth of the platform. Furthermore, a process model is developed from the case study. It shows that platform-based customer agility is achieved by establishing information management structure, developing information management capability, and instilling information management culture. This study contributes to the knowledge on customer agility and information management. Detailed recommendations are also provided for potential practitioners.  相似文献   

Social influence on endorsement in social Q&A community: Moderating effects of temporal and spatial factors     

《International Journal of Information Management》2021

This study examines the impacts of social influence, which are manifested by popularity and source credibility, on social endorsement in social Q&A community; and how the relationship is impacted by temporal-spatial factors. By collecting panel data from a large platform, the results of an econometric model demonstrate that popularity and source credibility are positively associated with social endorsement. With respect to the moderation effects, the results further show that time distance strengthens the effect of popularity on the social endorsement, but undermines the effect of source credibility; while crowdedness plays the role that strengthens the impact of popularity on the social endorsement, it has no significant moderating effect on the relationship between source credibility and social endorsement. Both theoretical and practical implications are discussed.  相似文献   

The mediating role of moral exclusion between authoritarianism and outgroup discrimination     

《Int J Intercult Relat》2020

It has been well-documented that right wing authoritarianism and social dominance orientation as two facets of the authoritarian personality differentially account for a variety of negative intergroup behaviors. Integrating the Dual Process Model (Duckitt, 2001), with the literature on “Moral exclusion” (e.g., Opotow, 1990; Tileagă, 2007) we investigated whether or not moral exclusion would mediate such a relationship. Employing survey data (N = 1015), collected from a representative Hungarian sample, we found that moral exclusion mediated the effects of both RWA and SDO on the negative behavioral intentions against Roma as well as Jewish minorities in Hungary. Moreover, we argued that the concept of moral exclusion should be interpreted not as a generalized tendency, but as a mechanism which can be stemmed from distinct social cognitive motivations.  相似文献   

Drivers of information technology choice by individuals     

《International Journal of Information Management》2021

Technology acceptance has spawned considerable research in technology adoption, technology use, and technology switching. However, technology choice—i.e., an individual’s selection of a technology from a set of technologies that support similar tasks—has received limited attention in information systems research. This research was aimed at identifying the drivers of technology choice through a series of activities in two universities, in which students chose an information technology tool from various alternatives to complete the given tasks. A thematic analysis was conducted on the reasons for technology choice reported by 249 students, which yielded 18 technology, user, and environmental drivers that influenced individuals’ technology choice. This study provides insights into the drivers generally applicable for technology choice and drivers applicable in specific contexts. Implications for research and practice are discussed.  相似文献