Watching online videos interactively: the impact of media capabilities in Chinese Danmaku video sites

In China, the implementation of a Danmaku social media system to sustain and raise user interest in online video sites is an increasingly widespread phenomenon. Danmaku technology is used to display users’ messages in written text on the online video stream. Little is known about the effects of this form of interactive enhancement. The aim of this empirical study is to evaluate the evolving media capabilities of the Danmaku system and their effects on users’ perceptions of interactivity and their intentions to continue using Danmaku. We draw on media synchronicity theory and apply it to a stimulus-organism-response model. Using this framework, we hypothesize that the media capabilities of the Danmaku system, namely its transmission velocity, parallelism, symbol sets, rehearsability, and reprocessability, elicit increased interactivity, which influences users’ instantaneous intentions to share and to continue the use of the Danmaku system. The results showed that both users’ instantaneous intention to share and their intention to continue to use were significantly affected by the perceived interactivity. Unlike the results of previous studies, our findings showed that all five media capabilities positively affected the users’ perceptions of interactivity. The potential theoretical and practical implications of our findings are discussed.     

Finding environmentally important industry clusters: Multiway cut approach using nonnegative matrix factorization

This paper proposes an optimal combinatorial method for finding groups of industries with relatively large CO₂ emissions through industrial relations. Using an economic input–output table, we estimated a non-symmetric matrix describing how much CO₂ is emitted in producing the commodity of industry i, which was purchased to produce commodity of industry j, to meet the final demand for a specific commodity. A symmetric strength of relations matrix describing the CO₂ emissions associated with the industrial relations was further estimated using the non-symmetric matrix. The strength of relations matrix can be viewed as a representation of the supply-chain network of the final commodity. In this study, we estimated the strength of relations matrix associated with the final demand for automobiles and applied the multiway cut approach using nonnegative matrix factorization to the matrix in order to find environmentally important industry clusters in the Japanese automobile supply chain. According to our empirical results, the optimal number of industry clusters is 19, and 4 industry clusters are playing a key role in CO₂ emission reduction.     

An integrated modelling approach for raw material management in a steel mill

An integrated modelling approach combining optimisation models with simulation is proposed for coordinated raw material management at steel works throughout the whole supply chain management process. The integrated model is composed of three components: ship scheduling, yard operation simulation and material blending models. The ship scheduling model determines which brands, how much and when they should be arrived, and the problem is modelled as mixed integer linear programming. The simulation model is used to simulate the whole processes from ships’ arrivals to the retrieval of the materials through the berthing and unloading the raw materials. Finally, the raw material blending model is developed for determining the brand and quantity of raw materials to be used. The proposed integrated modelling approach for raw material management has been successfully implemented and applied at steelwork to provide shipping schedules and predict future inventory levels at stock yards. By coordinating all the activities throughout the entire raw material supply chain management process, this article proposes an integrated approach to the problem and suggests a guideline by the appropriate simplification. The quantitative nature of the optimisation model and simulation facilitates an assessment of the risk factors in the supply chain, leading to an evaluation of a wide variety of scenarios and the development of multiple contingency plans. Further research is expected to supplement the ship scheduling models with heuristics for the idiosyncratic constraints of maritime transportation.     

HOW DO POLITICAL OPPORTUNITIES MATTER FOR SOCIAL MOVEMENTS?: Political Opportunity,Misframing, Pseudosuccess,and Pseudofailure

A longitudinal case study of Korean white-collar labor movements, which newly thrived in the democratizing atmosphere after the 1987 June Democratic Struggle, confirms that political opportunity is an important external factor that impels movement dynamics toward political protest and interunion solidarity. However, the impact of political opportunity is more complicated than the political process model suggests. First, it is not objective but perceived opportunity that is causal for movement dynamics: Opportunity is filtered through participants' interpretations, which shape their responses to it. The effect of political opportunity is mediated by participants' subjective conclusion (often inaccurate) that a movement goal has been promoted or obstructed by a particular source (source attribution). Without this framing mediation, the impact of political opportunity remains indeterminate, as a single opportunity structure may produce disparate movement dynamics and, conversely, movements may mobilize under both contracting and expanding opportunities. Second, the causal impact of perceived opportunity–whether perceived contraction or expansion–is contextually specific and contingent. When union members consider their attempts to achieve goals a failure and ascribe the failure to government intransigence, anti-government sentiments facilitate political protest. In contrast, success attributed to the efficacy of collective action nurtures solidarity consciousness and labor collectivity. In either event, movement dynamics improve.     

A characterization of the Walras rule

This paper has three purposes. First, we refine the characterization of the Walras rule proposed by Nagahisa (JET 1991) over a more natural and simple domain than the one he employed. We show that the Walras rule is the only social choice rule defined over the domain and satisfying Individual Rationality, Pareto Efficiency, and Local Independence. Second, assuming endowments to be collectively owned, we show that the Walras rule operated from equal division is the only social choice rule satisfying No Envy, Pareto Efficiency, and Local Independence. Third, we show that for every social choice rule satisfying Individual Rationality and Pareto Efficiency, Local Independence is equivalent to a condition of Nash implementation with a game form satisfying convexity.This article is a revised version of Toyama University Working Paper No. 141. We are grateful to Professors William Thomson, Shinsuke Nakamura, Tomoichi Shinotsuka and two anonymous referees for their detailed comments. Nagahisa is grateful for hospitality of the economics department of the University of Rochester.     

Relative Deprivation and Career Decision Self‐Efficacy: Influences of Self‐Regulation and Parental Educational Attainment

Nearly 70% of Korean women pursue postsecondary education, yet they occupy lower‐status positions than do men (K. Kim & Han, 2008 ). Therefore, the authors examined relative deprivation in equal opportunities and its effect on career‐related self‐efficacy among 603 Korean female college students. Self‐regulation was hypothesized to mediate the effects of relative deprivation on career decision self‐efficacy. This effect was hypothesized to differ according to parents’ educational attainment due to different degrees of parental support. As expected, self‐regulation mediated the relationship between relative deprivation and career decision self‐efficacy for participants whose parents had high education levels. However, participants whose parents had low education levels demonstrated less involvement in resolving relative deprivation. Findings suggest that career counselors should use different interventions based on parental education level to influence students’ self‐regulation and to enhance career decision self‐efficacy.     

Emerging Social Work Field Education Trends in China

MSW field education in China has been adopting Western models. However, this adaptation cannot address all educational and professional training needs in China. This study used an exploratory qualitative study design and interviewed 54 MSW students regarding their field experiences at a university in Shanghai. Results revealed six key themes: field education curriculum design’s influence on student field experiences, faculty advisers’ influence on student field experiences, field agencies’ expectations toward MSW intern performance, field agencies’ capacity to host MSW interns, student perceptions of their professional competencies, and students’ coping strategies to manage challenges in field practicum. Competency-based social work field education is a potential solution to address the current social work field education challenges in China.     

Equivalence scales for extended income in the U.S

Estimates of extended household income (the sum of market income and the imputed value of non-market household production) should adjust for differences in household size and composition using equivalence scales. However, the equivalence parameters traditionally applied to market income do not plausibly apply to non-market income. Economies of scale in the relationship between living standards and household income are greater for non-market income from household production than market income, and the costs of children relative to adults are higher in household production time than in cash expenditures. Also, the presence of a full-time family caregiver significantly reduces cash expenditures on child care. This paper proposes equivalence scales that can be separately applied to the components of extended income, and demonstrates their empirical relevance with pooled data from the American Time Use Survey for 2010–2014. The proposed parameters significantly alter the relative contribution of non-market income to extended income and modify comparisons of extended income across different family household types, with particularly significant implications for the relative well-being of those with and without full-time family caregivers.     

INSTITUTIONALIZING SOCIAL MOVEMENTS: The Dual Strategy of the Korean Women's Movement

Since the 1990s, scholars have paid attention to the role of social movements traversing the official terrain of politics by blending a “contention” strategy with an “engagement” strategy. The literature often highlights the contribution of institutionalized social movements to policymaking and sociopolitical change, but rarely addresses why and how specific social movement organizations gain routine access to formal politics. Using the Korean women's movement as a case study, I analyze the conditions for movement institutionalization. As I perceive it as the consequence both of social movements' decision to participate in government and of the state's desire to integrate such movements into its decision‐making process, movement institutionalization appears when the three factors are combined: (1) pressure from international organizations, (2) democratizing political structures, and (3) cognitive shifts by movement activists toward the role of the state.