Tinder and humanitarian hook-ups: the erotics of social media racism

In March 2014, at the height of the popularity of the hook-up application Tinder, The Guardian published the “Seven Shades of Cliché” of user profiles claiming that Humanitarians of Tinder are the “creepiest ticket yet to laidsville.” Humanitarians of Tinder are Tinder users (a hook-up application) who have selected to present images of themselves in humanitarian or volunteer settings outside of the West (or Global North, developed world). With a Tumblr devoted to this subgroup of Tinder users, and mainstream media outlets including The Washington Post, The Atlantic, The Huffington Post, Yahoo News, and the feminist blog Jezebel following this story, Humanitarians of Tinder evoke dialogue about the intersections of sexiness and racialized benevolence. This article takes seriously Humanitarians of Tinder to think through the connections between social media hook-ups, racial affect, feminist studies humanitarianism, and racisms in development. It asks: why do people use humanitarian photos to generate hook-ups on social media? How does holding an African baby make someone “hot”?     

基于次梯度投影的泛投资组合选择策略

在线投资组合选择(online portfolio selection)问题是当前量化投资领域一个重要的研究问题.近些年来,可投资标的的爆炸式增长急需能够有效计算的投资组合选择策略,而现有高绩效算法大多具有指数级或多项式级的时间复杂度,不利于在实际中应用.由此,本文提出了一种基于次梯度投影的泛投资组合选择策略SGP.将次梯度投影的思想应用到资产组合构建的过程中,得到策略的再平衡规则.理论上,本文分析了次梯度投影算法的竞争性能,证明了该策略是一个泛投资组合选择策略;并发现该算法具有线性时间复杂度.实证上,验证了SGP策略在美国与中国市场的表现.结果表明,SGP策略能够实现和最新的泛投资组合选择策略相当的收益率,而算法运行时间短于现有策略.参数敏感性分析表明SGP策略对参数选择不敏感;交易成本敏感性分析表明SGP策略能够承受合理的交易成本.     

线上线下融合模式下考虑战略顾客行为的供应链协调研究

在移动电商高速发展和移动支付日益便捷的时代，线上线下融合商务模式正日益成为传统零售、电子商务甚至快递物流企业转型升级的重要方向，影响着供应链运营管理及其优化决策。线上线下融合模式下的战略顾客行为不同于传统模式，其对于供应链运营管理及其优化决策的影响也不同于传统模式。基于O2O运作模式特征，运用战略顾客行为理论、供应链优化与协调理论，本文分别构建了"线上下单+线下体验+线下支付+自行提货"O2O模式1、"线上浏览+线下体验+线上购买+线下配送"O2O模式2、纯线下模式和纯线上模式下考虑战略顾客行为的供应链集中决策模型和契约协调模型，并进行了相应的数值分析，在此基础上，提出了相应的管理启示。研究结果表明：（1）无论是"线上下单+线下体验+线下支付+自行提货"O2O模式1还是"线上浏览+线下体验+线上购买+线下配送"O2O模式2，收益分享契约机制可以有效地实现战略顾客行为下的供应链协调。（2）对比两种O2O模式和两种非O2O模式，O2O模式1和O2O模式2能给供应链及其成员带来更多的利润，而纯线上模式和纯线下模式能给战略顾客带来更高的效用。（3）O2O模式下，制定较高的自提补贴和较低的折扣价格，有利于提高供应链及其成员的运营绩效。（4）O2O模式下，增强产品及其相关服务的实际体验效用，有利于提高供应链整体及其成员的运营绩效，有利于提高战略顾客的净效用。     

The Romance of Surrogacy1

This article seeks to demonstrate and analyze the cultural and emotional work surrogate mothers collectively engage in on the largest surrogacy support website, http://www.surromomsonline.com . Surrogate mothers’ online stories and discussions frame contract surrogacy as a “labor of love.” Women often describe their surrogacy as a “journey” of shared love; they hope for a lasting relationship with the couple they carry for. This article explores how the language of love, learned and internalized through online communication with other surrogates, creates both a cultural conceptualization of surrogacy and a ground for action. Love and altruistic giving are consistent with close interpersonal rather than market relationships; surrogates hope for a long‐term friendship with their couple. Surrogacy journeys, however, not infrequently end in disappointment; surrogates feel betrayed when couples cut ties. As a result of collective learning, surrogates’ discussions increasingly articulate the position that love, even when unreciprocated, can lead to repeated giving; love is noble and ennobling. Surrogates find appreciation and support in their online surrogacy community where they agree that giving life is a moral good. This stance has contributed to a renewed enthusiasm to bear children for others.     

基于在线评论数据的产品需求趋势挖掘

随着经济水平的提高和物质生活的丰富，消费者的需求变化也越来越快。能否迎合市场需求的变化是企业产品成功的关键。随着社交媒体的发展，消费者为了分享购物体验发表了许多在线评论信息，其中蕴含着消费者的需求变化。本文在产品特征提取和属性情感分析的基础上，构建了垃圾评论识别模型。然后，利用时间序列分析模型预测下阶段的产品属性关注度和情感计算。最后结合历史数据的变化趋势，分析产品属性的重要性和市场满意情况。利用汽车论坛上的汽车评论数据对本文提出的研究模型进行了验证。研究结果可以为企业制定营销策略以及产品改进与创新提供决策支持。     

Permanently online and permanently connected: Taiwanese university students’ attachment style,mobile phone usage,and well-being

Taiwan has been the top country worldwide in terms of its adoption and use of mobile phones. This study explores the permanently online (PO) and permanently connected (PC) phenomenon in mobile phone use among Taiwanese university students. It seeks to determine whether attachment styles are a distinctive factor that influences PO and PC (POPC) behavior and leads to various levels of well-being. The results of this study provide initial evidence that Taiwanese users highly depend on their mobile phones for PC and PO activities but perceive that being permanently connected causes interpersonal stress. Although the findings showed that all styles were positively associated with PO, only the secure and anxious styles predicted PC. Regarding mobile phone activities, the avoidant attachment style was not associated with any activities, the secure attachment style was positively associated with online and voice communication as well as information-seeking activities, and the anxious attachment style was associated only with voice communication. Furthermore, attachment styles lead to various levels of interpersonal stress through PO and PC behavior. The anxious style interacts with PO on interpersonal stress. This study provides evidence that attachment style is a significant antecedent of POPC and its consequences in mobile phone usage.     

Lurking Behavior in Online Psychosocial Discussion Forums: Theoretical Perspectives and Implications for Practice

Improving outcomes of telebehavioral psychoeducation requires rethinking program design when delivered wholly or partially for self-directed participation. Discussion forum participation often follows the “90-9-1 Rule” where 90% of participants lurk, rather than contribute content. A theoretical perspective on the behavior can help explain its adaptive functions, as well as the threats that this behavior poses to the lurker. Implications for practice require program redesign that actively links individual skills training and group-based discussion. The proposed linking design can synergize individual and group participation to support the development of mutual aid, as well as greater interaction with psychoeducation content and materials.     

Comparing Social Work Students’ Perceptions of Risk Using Online Discussion Fora: Lessons Learned from a European Pilot Project

Comparisons of international child welfare systems have identified two basic orientations to practice; a ‘child protection’ orientation and a ‘child welfare’ orientation, which are founded upon fundamentally different values and assumptions regarding the family, the origins of childcare problems, and the proper role of the state in relation to the family. This paper describes a project which sought to compare how undergraduate social work students from three European Universities perceive risk in referrals about the welfare of children and to explore the impact of different cultural, ideological and educational contexts on the way in which risk is constructed by students. Students from Northern Ireland, Germany and Poland examined three vignettes via 10 online discussion fora each of which provided a narrative summary of their discussion. The paper presents some findings from the analysis of the qualitative data emerging from the student discussions and draws out the lessons learned in terms of how the project was designed and implemented using online discussion fora.     

浅议当前我国立法需要完成的几个任务

我国社会主义法律体系虽然已经基本形成,但针对当前突出的社会问题,立法需要承担起社会主义道德建设的重任,树立社会主义核心价值观,实现法律与道德的相互促进。所以,在立法时应实现对社会各种利益进行确认、保护与分配的任务,平衡不同的利益冲突,加大对社会弱势群体的保护力度,以实现社会的公正与和谐。