我国智慧城市建设的现状和类型比较研究

我国迅速发展的城市面临着人口的迅速增加，资源和环境的急剧恶化，经济发展的转型和城市运行、管理、服务的滞后，为城市发展带来了巨大的挑战。自从2010年以来，我国许多城市相继制订了智慧城市建设方案，为城市可持续、稳定的发展探索新的发展理念和模式。本文通过理清智慧城市建设思想的起源与特征，阐述了智慧城市建设的技术基础及其应用，比较了我国28个智慧城市建设起步阶段的成效，提出了我国智慧城市建设目前需要解决的关键问题以及未来发展的目标和方向。     

Social media teams as digital vanguards: the question of leadership in the management of key Facebook and Twitter accounts of Occupy Wall Street,Indignados and UK Uncut

Recent protest movements such as Occupy Wall Street in the US, the indignados/15M movement in Spain, and UK Uncut have witnessed the rise of social media teams, small activist groups responsible for managing high-visibility and collective activist social media accounts. Going against dominant assertions about the leaderless character of contemporary digital movements, the article conceptualises social media teams as ‘digital vanguards’, collective and informal leadership structures that perform a role of direction of collective action through the use of digital communication. Various aspects of the internal functioning of vanguards are discussed: (a) their formation and composition; (b) processes of internal coordination; (c) struggles over the control of social media accounts. The article reveals the profound contradiction between the leadership role exercised by social media teams and the adherence of digital activists to techno-libertarian values of openness, horizontality, and leaderlessness. The espousal of these principles has run against the persistence of power and leadership dynamics leading to bitter conflicts within these teams that have hastened the decline of the movements they served. These problems call for a new conceptual framework to better render the nature of leadership in digital movements and for new political practices to better regulate the management of social media assets.     

“Hope in a hashtag”: the discursive activism of #WhyIStayed

Hashtag feminism, or feminist activism that unfolds through Twitter hashtags, has become a powerful tactic for fighting gender inequities around the world. Feminist media research, however, has yet to grasp the implications of this new form and social movement research has yet to model the conditions under which activists successfully mobilize online. This article builds on research regarding the potential and limitations of hashtag feminism to consider a question that remains understudied: what is the process through which a feminist hashtag develops into a highly visible protest? Through a case study of #WhyIStayed, which arose in response to a 2014 NFL domestic violence controversy, I frame hashtag feminism as an extension of the movement’s historically rooted discursive tactics. Hashtag feminism’s narrative form implies that the conditions for a successful online feminist protest parallel the elements of an effective dramatic performance. Using data collected from Twitter and news media, I identify the dramatic elements that propelled #WhyIStayed tweets from online personal expressions to online collective action.     

#BringBackOurGirls: digital communities supporting real-world change and influencing mainstream media agendas

#BringBackOurGirls shows the potential that cyber-communities have for setting the agenda for mainstream media sources around issues that are life-changing for women and girls around the world. The article examines the ways that social media communities sustained the hashtag #BringBackOurGirls, bridging online and offline communities to form a united movement. The analysis is contextualized within the online community-organizing framework of Twitter Topic Networks, as theorized in a 2014 study by the Pew Research Center Internet and American Life Project. This essay studies the evolution of #BringBackOurGirls to analyze the ways that online communities can educate, organize, and mobilize publics.     

数字化游戏在计算机主导外语教学改革中的应用

随着计算机和网络相关技术的发展，计算机主导教学模式将成为未来外语教学改革的必然发展趋势。在计算机主导教学模式中应用数字化游戏进行外语教学改革，从课前、课中、课后三个阶段的教学设计入手，结合数字化游戏在外语教学中的优势，力求为传统课堂存在的教学内容缺乏、教学方法单一、教学评价过于简单等实际问题提供解决方法。     

Local Digital Algorithms Applied to Boolean Models

We investigate the estimation of specific intrinsic volumes of stationary Boolean models by local digital algorithms; that is, by weighted sums of local configuration counts. We show that asymptotically unbiased estimators for the specific surface area or integrated mean curvature do not exist if the dimension is at least two or three, respectively. For three‐dimensional stationary isotropic Boolean models, we derive asymptotically unbiased estimators for the specific surface area and integrated mean curvature. For a Boolean model with balls as grains, we even obtain an asymptotically unbiased estimator for the specific Euler characteristic.     

Masses,Crowds, Communities,Movements: Collective Action in the Internet Age

This article investigates two questions: One, how might the very differently structured social collectives on the Internet – masses, crowds, communities and movements – be classified and distinguished? And two, what influence do the technological infrastructures in which they operate have on their formation, structure, and activities? For this, we differentiate between two main types of social collectives: non-organized collectives, which exhibit loosely coupled collective behavior, and collective actors with a separate identity and strategic capability. Further, we examine the newness, or distinctive traits, of online-based collectives, which we identify as being the strong and hitherto non-existent interplay between the technological infrastructures that these collectives are embedded in and the social processes of coordination and institutionalization they must engage in, in order to maintain their viability over time. Conventional patterns of social dynamics in the development and stabilization of collective action are now systematically intertwined with technology-induced processes of structuration.     

Mapping the two levels of digital divide: Internet access and social network site adoption among older adults in the USA

Older adults have increasingly adopted Internet and social network sites (SNSs), but little communication scholarship has explored systematic differences in access within this population. Using a nationally representative sample of Americans over the age of 50 years from the 2012 Health and Retirement Study, we examine Internet access (N?=?18,851) and SNS adoption patterns (N?=?869) among this sample and explore how these patterns vary by age. Regarding Internet access, results suggest that while the gender divide has reversed in favor of women, older adults who are economically, socioculturally, or physically disadvantaged are less likely to have reliable Internet access. In addition, the view that the various divides in Internet access are less of a concern for those who are younger is only partially supported, as some access-related divides do not vary by age or even decrease with age. For SNS adoption, we found that access to technological resources (diversity of online activities) positively predicts SNS use. Moreover, SNS users are more likely to be younger, female, widowed, and homemakers, perhaps because these individuals are more motivated to use SNSs to complement or compensate for their existing social status. These findings reveal unique challenges and motivations in relation to Internet access and SNS adoption patterns across the later life span.     

Digital skills and social media use: how Internet skills are related to different types of Facebook use among ‘digital natives’

Based on the idea that Internet use can be conceptualized in terms of depth (frequency) and width (differentiated) uses of the Web, this study explored how socio-demographic factors and digital skills are related to frequency and types of Facebook use among young adults. It used a face-to-face representative survey conducted in the three main urban areas of Chile among a sample of 18-to 29-year olds. The results found that men and more educated young people had higher levels of skills, confirming that the so-called ‘digital natives’ are not a monolithic group. They also revealed that digital skills did not predict frequency of Facebook use. Furthermore, lower educated young people tended to use Facebook more frequently. Although these results go against the long-established digital divide research, traditional digital gaps emerged when types of use were analyzed. While more educated and skillful individuals tended to use Facebook for informational and mobilizing purposes, socio-demographic factors and skills did not make a difference in Facebook use for social purposes.     

“谷歌模式”冲击下的传统出版业创新策略

传统出版业在数字化的过程中,充当着内容提供商的角色,然而＂谷歌模式＂虽然不拥有＂内容＂,但拥有捕捉内容的能力、技术和配套的商业模式,让传统出版业受到了前所未有的冲击。传统出版业必须要在创新中求得发展：从内容提供商转向全方位数字出版服务商,确立内容资源优势,实现产品创新和技术创新;加快推动数字化转型,制订行业统一的技术标...