共查询到20条相似文献，搜索用时 31 毫秒
1.
Jiqun Liu Yiwei Wang Soumik Mandal Chirag Shah 《Information processing & management》2019,56(3):1010-1025
An individual's Web search behavior can be influenced by a number of factors, including features and functions of a search engine as well as search education. In contrast to the long-lasting attention to the algorithm and interface dimensions of search, there is a lack of research concerned with the potential effects of user education on search behavior. To address this gap, we ran a three-session field-lab-combined study to examine the effects of user education from two distinct sources – peer advice and cognitive authority (operationalized as video-based student's advice and expert's advice respectively) – on Web search behavior in two different search task scenarios (i.e., factual specific and factual amorphous tasks). We also tested if these behavioral effects persist for a short period of time when the explicit search tips are removed. Using 185 task session data generated by 31 participants in two field and one lab sessions, this study demonstrates that: (1) both peer advice and cognitive authority are effective in stimulating immediate behavioral changes in Web search; (2) the immediate behavioral impact of search advice is broader in factual amorphous task than in factual specific task; (3) framing search tips as the advice from cognitive authority is more likely to generate continuing, short-term effects on Web search behaviors. This research has implications for the design of task-aware user education as well as the study of users’ interactions with IR systems in general. 相似文献
2.
【目的】 以《遥感学报》视频号短视频运营为具体案例,通过分享视频制作各环节的实践经验,提出短视频运营现存的问题和对策,以期为其他科技期刊的新媒体运营提供借鉴。【方法】 采用案例分析、文献调研和用户调研的方法,以《遥感学报》视频号发布的短视频为研究对象,从短视频的整体规划、主题内容、素材收集、剪辑制作、宣传推广、效果追踪等环节分享实践经验。【结果】 科技期刊利用短视频这种新的媒体形式,可有效提高期刊的影响力,但是在内容、人员和传播力度方面还存在不足,有待进一步优化调整。【结论】 短视频运营上,科技期刊可深度挖掘优质资源来丰富短视频的内容,多渠道打造专业团队以缓解人员不足的压力,通过媒体矩阵联动、频繁发布高质量作品、举办各种学术活动等方式,促进短视频平台和科技期刊内容的有效融合和传播。 相似文献
3.
【目的/意义】探索新媒体时代短视频信息传播影响力,有助于新闻媒体机构针对受众特点改进自身的传播
模式,为相关机构或部门在进行社会治理的过程中提供更及时、丰富、准确的信息服务。【方法/过程】以新闻媒体机
构官方账号为研究案例,爬取短视频新闻对应的点赞量、评论量、播放量、弹幕量等用户信息数据。从点播指数、互
动指数、利用指数三个方面设置权重,构建短视频传播影响力指数（VDI）。综合视频播放时长、视频数量、视频内容
及制作形式等多个维度测算短视频新闻的信息传播影响力,分析其传播效果的影响因素。【结果/结论】研究结果表
明,视频播放时长对短视频传播效果具有显著的影响,受众特征与制作水平是影响短视频传播效果的重要因素,弹
幕能够有效促进短视频传播过程中的即时影响力。【创新/局限】研究中获得的相关结论能够为相关新媒体部门利
用短视频了解社情民意,并为正确引导网络舆情提出科学依据。未来的相关研究将会采集更广泛的数据进行更深
层次的观点挖掘。 相似文献
4.
5.
《Information processing & management》2020,57(3):102189
The recent significant growth of social media has brought the attention of researchers toward monitoring the enormous amount of streaming data using real-time approaches. This data may appear in different forms like streaming text, images, audio, videos, etc. In this paper, we address the problem of deciding the appropriateness of streaming videos with the help of on-demand crowdsourcing. We propose a novel crowd-powered model ViSSa, which is an open crowdsourcing platform that helps to automatically detect appropriateness of the videos getting uploaded online through employing the viewers of existing videos. The proposed model presents a unique approach of not only identifying unsafe videos but also detecting the portion of inappropriateness (in terms of platform’s vulnerabilities). Our experiments with 47 crowd contributors demonstrate the effectiveness of the proposed approach. On the designed ViSSa platform, 18 safe videos are initially posted. After getting access, 20 new videos are added by different users. These videos are assessed (and marked as safe or unsafe) by users and finally with judgment analysis a consensus judgment is obtained. The approach detects the unsafe videos with high accuracy (95%) and point out the portion of inappropriateness. Interestingly, changing the mode of video segment allocation (homogeneous and heterogeneous) is found to have a significant impact on the viewers’ feedback. However, the proposed approach performs consistently well in different modes of viewing (with varying diversity of opinions), and with any arbitrary video size and type. The users are found to be motivated by their sense of responsibility. This paper also highlights the importance of identifying spammers through such models. 相似文献
6.
《Information processing & management》2020,57(1):102130
With the rapid development of digital equipment and the continuous upgrading of online media, a growing number of people are willing to post videos on the web to share their daily lives (Jelodar, Paulius, & Sun, 2019). Generally, not all video segments are popular with audiences, some of which may be boring. If we can predict which segment in a newly generated video stream would be popular, the audiences can only enjoy this segment rather than watch the whole video to find the funny point. And if we can predict the emotions that the audiences would induce when they watch a video, this must be helpful for video analysis and for guiding the video-makers to improve their videos. In recent years, crowd-sourced time-sync video comments have emerged worldwide, supporting further research on temporal video labeling. In this paper, we propose a novel framework to achieve the following goal: Predicting which segment in a newly generated video stream (hasn’t been commented with the time-sync comments) will be popular among the audiences. At last, experimental results on real-world data demonstrate the effectiveness of the proposed framework and justify the idea of predicting the popularities of segments in a video exploiting crowd-sourced time-sync comments as a bridge to analyze videos. 相似文献
7.
《Information processing & management》2019,56(6):102091
Large collections of digital video are increasingly accessible. The large volume and range of available video demands search tools that allow people to browse and query easily and to quickly make sense of the videos behind the result sets. This study focused on the usefulness of several multimedia surrogates, in terms of effectiveness, efficiency, and user satisfaction. Three surrogates were evaluated and compared: a storyboard, a 7-second segment, and a fast forward. Thirty-six experienced users of digital video conducted searches on each of four systems: three incorporated one of the surrogates each, and the fourth made all three surrogates available. Participants judged the relevance of at least 10 items for each search based on the surrogate(s) available, then re-judged the relevance of two of those items based on viewing the full video. Transaction logs and post-search and post-session questionnaires provided data on user interactions, including relevance judgments, and user perceptions. All of the surrogates provided a basis for accurate relevance judgments, though they varied (in expected ways) in terms of their efficiency. User perceptions favored the system with all three surrogates available, even though it took longer to use; they found it easier to learn and easier to use, and it gave them more confidence in their judgments. Based on these results, we can conclude that it's important for digital video collections to provide multiple surrogates, each providing a different view of the video. 相似文献
8.
Morgan G. Ames 《The Information Society》2016,32(2):85-97
ABSTRACTThis article examines one of the largest interventions in computer-based learning currently underway, the One Laptop per Child (OLPC) project, with 2.5 million laptops in use worldwide. Drawing on 2010 and 2013 fieldwork investigating a project in Paraguay with 10,000 of OLPC's “XO” laptops, I explore the ways in which participants interpreted leisure laptop use as “learning.” I show that the most captivating uses of the laptops were not “productive” or programming-centric, as OLPC's developers hoped, but “consumptive” and media-centric, focused on music, videos, and video games. I discuss the learning benefits and drawbacks of this use, as understood by participants and in light of education research, and in light of the broader context of transnational corporations interested in marketing to these children. In the process, I weigh OLPC's utopian dreams against the interests of the child beneficiaries, concerns of media imperialism, and a potential shift in the meaning of computers. 相似文献
9.
【目的】 视频化时代下,通过《协和医学杂志》开展知识类视频内容传播的具体实践,总结医学期刊知识类视频内容传播的有效运营方法及现存问题,为期刊同仁提供思路及借鉴。【方法】 介绍《协和医学杂志》新媒体开展知识类视频内容传播的优势及效果,并从视频选题、内容制定、类型把控、视觉表现和传播渠道5个方面分享运营策略及典型案例。【结果】 《协和医学杂志》新媒体在知识类视频内容传播发展中通过锚定黄金栏目开展高起点系列选题策划,基于不同用户需求差异化制定视频内容,打破藩篱实施短中长视频全线发展,并创新探索MG动画与AI语音融合的视听表现,结合多平台分发、多渠道引流等综合运营措施,增强期刊内容传播力和品牌影响力,成效显著。【结论】 医学期刊应抓住视频发展机遇,以多维度综合运营开创知识类视频新干线,为医学期刊视频内容传播拓新局。同时在实践中应注意发布规律、编辑素养、资金投入及长效发展布局等问题,从而坚实期刊市场竞争力,提升中国学术期刊知识内容传播影响力。 相似文献
10.
This research contributes to the intra-organization, inter-organization, and new product development (NPD) management literature by studying the impact of a firm's internal organizational design on the communication within and performance of NPD projects conducted with strategic alliance partners. The empirical data were collected from three in-depth case studies of network lead companies (NLCs) operating in different industries. The three NLCs have different internal organizational designs, ranging from very flexible “organic” to very rigid “mechanistic.” In each NLC, a successful new-to-firm product development project was chosen for further detailed investigation. First, we identify the role the alliance's NPD project characteristics and industry characteristics play in determining the “intensity level” and “media richness” of communication required between the alliance's NPD project partners. Then, we examine how the internal organizational design influences the actual intensity and media richness of communication of the alliance's NPD project that matches our assumptions of what is required. 相似文献
11.
The popularity of mobile devices has ushered in the prosperity of mobile commerce, yet research on mobile advertising and mobile marketing remains scant. Marketing ads possessing higher media richness generally have a positive effect on consumer decision-making, because rich media conveys more information, but mobile ads with richer media imply higher costs for both the marketer and the audience. The limitations of mobile devices have further highlighted the difficulty of mobile advertising and the issue of advertising costs. Selecting which media to deliver the appropriate information is the latest research trend, but few studies have applied the media richness theory to explain mobile ads’ effect on consumer behavior. This research thus explores the impact of media richness on consumer behavior at different AISAS (attention, interest, search, action, and share) stages, adopting experimental research, convenient sampling, and online questionnaire to collect data. From a total of 424 valid questionnaires, we find that media richness has a greater influence on the three early stages of AIS while having a lower impact on the later stages of AS. This research thus suggests that firms employing mobile ads should choose high richness media for those potential customers who are at the early stage of consumer behavior (AIS). For those who at the later stage (AS), it is good enough for marketers to utilize medium richness mobile ads. Following this suggestion, marketers can place mobile ads more precisely, thus improving the likelihood of a reduction in advertising costs for both the marketer and audience. As mobile ads with high media richness are more effective for high perceived risk products, firms need to use high richness media when they are promoting high perceived risk products even when potential consumers are at the later stage of AS. This research contributes to marketers dedicated to using a mobile advertisement strategy and helps refine both online consumer behavior and the media richness theory when including the context of mobile commerce. 相似文献
12.
Research typically focuses on one medium. But in today's digital media environment, people use and are influenced by their experience with multiple systems. Building on media ecology research, we introduce the notion of integrated media effects. We draw on resource dependence and homophily theories to analyze the mechanisms that connect media systems. To test the integrated media effects, we examine the relationships between news media visibility and social media visibility and hyperlinking patterns among 410 nongovernmental organization (NGO) websites in China. NGOs with greater news media visibility and more social media followers receive significantly more hyperlinks. Further, NGOs with a similar number of social media followers prefer to hyperlink to each other. The results suggest that both news media and social media systems are related to the configuration of hyperlink networks, providing support for the integrated media effects described. Implications for the study of hyperlink networks, online behaviors of organizations, and public relations are drawn from the results. 相似文献
13.
In the past decades, video games have grown from a niche market to one of the major entertainment media, enticing millions of players worldwide. When ethical aspects of video games are being debated, the discussion oftentimes revolves around effects of their content, such as violence. This paper argues that effects of game mechanics, such as reward mechanisms, should be considered as well, as these are at the core of the appeal of games. We analyze the ethical dimension of behavioral game design present in Massively Multiplayer Online Role Playing Games (MMORPG’s). Using the framework of technological mediation, we show how opaque and seductive game mechanics can invite problematic usage patterns, such as excessive use with negative effects on well-being, and how designers can take responsibility for morally acceptable impact of their games. Having a practical focus, the paper concludes with several proposals for better design. 相似文献
14.
[目的/意义]互联网作为信息生成与共享的重要载体,会助推非常规突发事件的次生灾害发酵与舆情蔓延。发掘驱动非常规突发事件关联网络集体行为意向的影响因素及过程机制,是破解其次生灾害与疏导舆情累加效应的核心所在。[方法/过程]基于信息技术接受模型(TAM)的理论视角,以非常规突发事件为背景,采用问卷调研与数据统计分析等方法展开实证研究,剖析网络情境特征以及网络信息受众的认知-心理状态对非常规突发事件网络集体行为意向的整合驱动机制。[结果/结论]研究发现:非常规突发事件关联网络集体行为意向是网络情境特征与信息受众认知-心理状态共同作用的结果;非常规突发事件关联网络集体行为意向具有情境依赖倾向,会受到媒介信息丰富度、网络社会联结强度两大因素的驱动;信息受众的认知-心理状态是网络情境特征驱动网络集体行为意向的重要桥梁。研究还揭示了TAM理论在网络舆情导向中的普适性与实践意义。 相似文献
15.
We investigate the effect of Europe's largest multilateral subsidy program for R&D-performing small and medium-sized enterprises. The program applied a specific budget allocation rule, referred to as Virtual Common Pot (VCP), which is designed to avoid cross-subsidization between participating countries. This rule creates exogenous variation in funding status and allows us to identify the causal effect of public R&D grants on firm growth. In addition, we compare the program's effect under the VCP rule with the standard situation of a Real Common Pot (RCP), in which program authorities allocate a single budget according to uniform project evaluation criteria. Our estimates suggest that R&D grants had no average effect on job creation and sales growth, but treatment effects were heterogeneous and positive for high-quality projects. Under an RCP the program would have created 53% more jobs and 48% higher sales. 相似文献
16.
Sponsored search is an online advertising channel that has gained momentum worldwide. The key challenge is deciding on the types of keywords to bid on and matching options to utilise for the keywords. In this paper, we address this problem by providing a broad analysis on how the various traffic search metrics (length, CTR, average cost per click (CPC), average position, and quality score) influence the bidding results as the keyword matching option becomes broader, that is, from exact, to phrase to broad. Drawing on the shopping goals theory, we also establish the profile of the metrics associated with a more focused search intent across the matching options. Using a random sample of keywords selected from 9 640 keywords that online advertisers have bid on, spanning a variety of markets, the results indicate that as the matching option becomes narrower, that is, from broad to exact, the keyword traffic metrics increase in general, except for cost, which does not differ significantly across the matching options. Longer keywords, which are typically associated with a more focussed search intent, generate more clicks and have a higher quality measure on average across all matching options. The longer keywords are cheaper for the exact match option, but more expensive for the other matching options. The results are inconclusive with regard to the position that longer keywords occupy on a results page across the matching options. Thus, the narrower matching options and longer keywords matching those that a customer would typically use to search for a company's goods and services need to be targeted to ensure higher visits to a company's website. 相似文献
17.
《Information processing & management》1999,35(3):381-400
The VISION (video indexing for searching over networks) digital video library system has been developed in our laboratory as a testbed for evaluating automatic and comprehensive mechanisms for video archive creation and content-based search, filtering and retrieval of video over local and wide area networks. In order to provide access to video footage within seconds of broadcast, we have developed a new pipelined digital video processing architecture which is capable of digitizing, processing, indexing and compressing video in real time on an inexpensive general purpose computer. These videos were automatically partitioned into short scenes using video, audio and closed-caption information. The resulting scenes are indexed based on their captions and stored in a multimedia database. A client-server-based graphical user interface was developed to enable users to remotely search this archive and view selected video segments over networks of different bandwidths. Additionally, VISION classifies the incoming videos with respect to a taxonomy of categories and will selectively send users videos which match their individual profiles. 相似文献
18.
19.
Florian Szücs 《Research Policy》2018,47(7):1256-1266
We evaluate the impact of the EC's Seventh Framework Programme, a large-scale research subsidy programme, on the innovation activities of subsidized firms, with a particular regard to industry–university partnerships. Using matching and difference-in-difference estimation, we find a positive effect on a range of innovation indicators. The number of project participants in general and university participants in particular positively affect performance, suggesting knowledge spillovers between project members. Research centres, on the other hand, do not exert positive externalities. We also find that the benefits of collaborating with universities are amplified by their academic quality. 相似文献
20.
[目的/意义]政务短视频的应运而生开启了政务服务与社会治理的新时代,在此背景下探讨政务短视频的内生逻辑,旨在推进我国政务短视频的健康持续发展。[方法/过程]基于信息生态理论视角,从理论、实践与技术三个方面对政务短视频发展的内生逻辑进行深入分析,并在此基础上提出政务短视频发展的优化路径。[结果/结论]当前政务短视频的发展存在着头重脚轻、定位模糊、追求形式和各自为战的问题,应从以下4个方面探索其优化路径,即强化顶层设计与明确整体规划,清晰自身定位与打造个性内容,整合政务账号与优化媒体生态,加强技术交流与发挥矩阵合力。 相似文献