Challenging Google Search filter bubbles in social and political information: Disconforming evidence from a digital methods case study

This article engages in the debate on supposed online ‘filter bubbles’ by analysing a panel of Google users’ search results on a standardized set of socio-politically themed search queries. In general, the query results appear to be dominated by mainstream media sources, followed at a large distance by civil society and government resources. By means of mixed model regression analyses, with the prominence of different source types in the search results as dependent variables, it was tested whether search results vary across Google Search users. The results indicate that the inclusion of participants as a random effect does not explain variance when controlling for the different query keywords and the time at which the queries were ran. Hence, this study does not support the occurrence of ‘filter bubbles’ in Google Search results in the context of social and political information.     

区间自适应算法与回声抵消

本文提出了一种新的自适应算法-"区间自适应算法",给出了"区间自适应参数约束条件",并对该"约束条件"进行了严格的数学证明."区间自适应算法"大大减少了自适应滤波器的计算量.本文还论述了"区间自适应算法"在回声抵消器理论与实践中的应用.     

基于社会计算的科普教育平台研究*

本文综合利用主题搜索、Wiki等技术,设计并实现了一个基于社会计算的科普教育平台。此平台是一个集科普资源共享、用户交流的开放平台,用户在此平台上可以利用科普Wiki添加、编辑、评论科普信息,实现广泛交流,提升自主学习能力。同时,还能利用科普搜索引擎搜索到专业的科普知识,并通过对搜索结果进行评分来影响科普搜索引擎对结果的排序,享受到更为专业和准确的搜索服务。     

伪正交镜象滤波器组的快速实现

本文描述了具有有效计算结构的分析－合成滤波器组的有效设计算法。其特点是在cosine调制滤波器组的设计上。得到滤波器组在计算和设计上是高效的，它可广泛应用在分频段编码（SBC）上。这里利用了快速Hartley变换，从而大大减少了运算量，为用在DSP超大滤波器组上奠定了基础。     

过滤用驻极体熔喷非织造布的研究

系统介绍了非织造布熔喷工艺、驻极化理论以及驻极体非织造布。通过制备驻极体纤维和驻极体熔喷非织造布,并对成品进行电镜分析,并进行力学性能、透气、透湿、过滤性等方面测试。通过数据分析表明驻极体熔喷非织造布是一种高效过滤材料,具有广阔的应用前景。     

Do social media literacy skills help in combating fake news spread? Modelling the moderating role of social media literacy skills in the relationship between rational choice factors and fake news sharing behaviour

This study modelled the rational factors that predict fake news sharing behaviour. It also tested the moderating role of social media literacy skills. The focus was on social media users in Nigeria. An online survey was conducted to gather the responses from participants across Nigerian geopolitical zones. Structural equation modelling (SEM) Smart PLS 3.6 was used to analyse the data. We found that information sharing, the news finds me perception, trust in social media and status-seeking lead to fake news sharing among social media users in Nigeria. Specifically, trust in social media and status-seeking had a greater effect on fake news sharing behaviour. We also found that social media literacy skills significantly moderate the relationship between information sharing, status-seeking, the news finds me perception, trust in social media and fake news sharing in such a way that the effects/relationships are stronger among those with low social media literacy skills. This outcome contributes to theory and practice which was highlighted in the concluding aspect of this study.     

Digital advertising around paid spaces,E-advertising industry’s revenue engine: A review and research agenda

We develop and describe a framework for research in a particular segment of digital advertising. Internet Advertising Paid Slots and Spaces (IAPS) is a neologism and work almost like a stock exchange for buying and selling advertising in various formats on designated spaces around web and make a significant contribution to Internet advertising revenues. These paid spaces were found to encompass diverse areas of Internet advertising that include search engine marketing, social media advertising and display advertising. Given the complexity of the modern digital advertising eco system, this literature review seeks to provide clarity, up-to-date knowledge and ongoing insights into Internet advertising channels, for managers making investment decisions in this context.     

Measuring consumer perception of social media marketing activities in e-commerce industry: Scale development & validation

The internet has changed the nature of shopping in the past two decades, which has supported the proliferation of e-commerce sites and thus shopping has shifted to e-shopping. Also, customers use social media to gain information on preferred products with the best price options, as social media provides shoppers a voice, and facilitate them to interact and share their opinion worldwide. Moreover, social media is extensively adopted platform for e-commerce. Although, social media marketing has achieved wide acceptance in business, especially in e-commerce, there is no scale in the extant literature to measure perceived social media marketing activities (SMMA) in an e-commerce context. Therefore, this study develops and validates a 15-item, five-dimensional scale for measuring perceived SMMA of e-commerce based on extant literature on e-commerce and social media marketing and five different studies conducted in this research. The scale revealed comprehensive psychometric characteristics as per the results from the diverse reliability and validity checks. It was revealed that perceived SMMA positively influenced purchase intention and brand equity; which endorses the nomological validity of the developed scale. The new scale provides both theoretical as well as managerial implications along with the avenues for forthcoming research.     

Examining the roles of social media and alternative media in social movement participation: A study of Hong Kong’s Umbrella Movement

During the recent wave of pro-democracy movement across the world, new media technologies play a vital role in mobilizing participants. Much scholarly attention has been paid to the role of social media in empowering grassroots movements, but the rise of alternative media was somehow ignored. This study examines the impacts of social media and alternative media on social movement participation. The data came from a survey of 769 students from eight public universities in Hong Kong at the height of the Umbrella Movement. The findings revealed that acquisition of political information from social media and alternative media is associated with social movement participation through different mechanisms. Specifically, social media serve as an echo chamber where people are motivated to participate by perceiving a homogeneous opinion climate and forming a pro-protest attitude. In contrast, alternative media serve as an attitude intensifier to facilitate social movement participation.     

908厂早期高效空气过滤器

介绍中国早期高效空气过滤器制造过程。原苏联提供了全套图纸和工艺文件,908厂利用国产材料研制出高效过滤器。1961年研制成功并批量制造第一批高效空气过滤器。1981年停止了老型号产品的生产。     

空气过滤捕集效率影响因素分析及多元关联式的确定

评价空气过滤捕集效率对于提高空气品质及优化过滤运行是非常重要的,但目前过滤捕集效率的计算公式均为隐函数,不便于实际应用,因此,本文采用过滤理论对各种过滤影响因素进行理论计算,然后,采用多元回归分析方法,得出计算过滤捕集效率的显性计算公式,并提出了计算多分散颗粒捕集效率的计算方法,以便于优化选择过滤介质及优化过滤运行参数。     

无隔板过滤器折距与性能关系的试验

无隔板过滤器滤芯折距影响过滤器性能。试验确定国产滤纸最佳折距。     

Saving lives using social media: Analysis of the role of twitter for personal blood donation requests and dissemination

Social media has an impact on many aspects of human life ranging from sharing personal information to revolutionizing political systems of entire countries. One not so well studied aspect of social media is analyzing its usage and efficacy in healthcare, particularly in developing countries which lack state-of-the-art healthcare systems and processes. In such countries, social media may be used to facilitate patient-centric healthcare by involving the patient for fulfilling personal healthcare needs. This article provides an in-depth analysis of one such need, that is, how people use social media to request for blood donations. We study the request and dissemination behavior of people using social media to fulfill blood donation requests. We focus on twitter, and blood donation accounts in India. Our study reveals that each of the seven twitter accounts we studied have a large followership of more than 35,000 users on an average and receive a substantial number (more than 900) of donation requests in a day on an average. We analyze the requests in various ways to present an outlook for healthcare providers to make their systems more patient-centric through a better understanding of the needs of people requesting for blood donations. Our study also identifies areas where future social media enabled automated healthcare systems can focus on the needs of individual patients. These systems can provide support for saving more lives by reducing the gap between blood donors and the people in need.     

Integrating guanxi into technology acceptance: An empirical investigation of WeChat

Social influence is an important research topic in the technology acceptance literature, in particular for social media. Prior empirical studies have for the most part employed social influence theory to investigate user intentions to continue with social media, while culture driven theories have been neglected. Rather than using social influence theory, we introduced guanxi theory to explore how guanxi social mechanisms (or processes) influence Chinese users’ continuance intentions in WeChat. Specifically, we developed a model that examines the role of guanxi as manifested by renqing, mianzi and ganqing in perceived usefulness, perceived enjoyment and continuance intention in WeChat. A survey research method was adopted to test the proposed hypotheses. This study found that ganqing has a positive impact on perceived usefulness and continuance intention. Mianzi exerts a negative effect on continuance intention but exhibits a positive effect on perceived usefulness. Renqing was found to have no significant impact on perceived usefulness and continuance intention. Our study advances the Technology Acceptance Model (TAM) by introducing guanxi-based constructs in a Chinese mobile social-messaging application context. Our study also offers alternative insights on guanxi-based social influence processes in the Chinese technology acceptance literature.     

一项民间的高效空气滤纸对比试验

共13家实验室参与了民间发起的、非商业目的的空气滤纸对比试验,旨在检验国内高效滤纸数据的偏离程度。对于同一种滤纸,由于试验方法和试验条件的差异,在不同实验室给出的滤纸透过率数据中,有近三个数量级的差别,而那些数据确实是按各自遵从的标准方法测出的。试验方法的混乱,是阻碍国产滤纸和过滤器进入高端市场的瓶颈。     

新型驻极体过滤材料性能测试分析与应用

通过对现用空调过滤材料和驻极材料进行性能对比测量,分析克重对过滤效率和阻力的影响,进而测量过滤材料和过滤器的性能差异、驻极材料的容尘性和“清洗”后效率,对驻极滤料的使用状况和应用前景进行探讨。     

Turkish diasporic responses to the Taksim Square protests: Legacy media and social media uses in Belgium,the Netherlands and Germany

Based on an offline and online survey of 967 people of Turkish origin living in these countries, we test how legacy and social media have influenced the participation of the members of the Turkish diaspora in Belgium, Germany and the Netherlands in the mid-2013 protests in Turkey’s social movement referred to as Gezi Park. This study also investigates how living in Europe can influence the behavior and attitudes of the sampled individuals from the Turkish Diaspora of Germany, Belgium and Netherlands during the period when the Gezi Park demonstration took place. Our results make it clear that social media were used by those who supported the protest movement, while those who opposed the protest movement primarily used or followed traditional sources of media, including Turkish and European television. Furthermore, supporters amongst the diaspora for the Gezi-protests were primarily active in accruing social capital through bonding and social networking among those who belong to the Turkish diaspora under the guise of the Gezi Park protests. Finally, a significant number of the supporters of the protests in the three countries took part in several different means of supporting the movement, including: disseminating awareness about the Gezi protests through social media, engaging in meetings, and in some cases, even severing contact with friends and acquaintances who did not share their support for the protest movement.