数字内容产品版权保护的演化博弈分析     

赵艳  王文举  倪渊 《图书情报工作》2019,63(2):43-51

[目的/意义]基于版权保护的演化博弈分析，有助于探究数字内容产品的原创主体对仿冒行为是否具有容忍度，以及不同仿冒水平下实施版权保护的策略选择，对规范数字内容产品市场主体行为具有一定指导意义。[方法/过程]首先借助演化博弈模型，分析原创主体与仿冒主体的利益演化过程，探究版权保护下原创主体对仿冒水平的容忍行为；然后通过细化博弈双方的利润函数模型，探究原创主体容忍度水平的决定因素。[结果/结论]原创主体对较小的仿冒水平存在一定的容忍度，对较高的仿冒水平零容忍。最大仿冒水平容忍度由仿冒交叉收益系数、收益模型常系数、产品研发成本系数和原创主体的产品研发努力水平倍数4个因素共同决定。  相似文献   

Adolescents’ motives for selling sex in a welfare state – A Swedish national study     

《Child abuse & neglect》2018

In addition to money or other compensation, other motives for selling sex may be important in a welfare country such as Sweden. The aim of this study was to carry out an exploratory investigation of adolescents’ motives for selling sex in a population-based survey in Sweden. A total of 5839 adolescents from the third year of Swedish high school, mean age 18.0 years, participated in the study. The response rate was 59.7% and 51 students (0.9%) reported having sold sex. Exploratory factor analysis and hierarchical cluster analysis were used to identify groups of adolescents according to underlying motives for selling sex. Further analyses were carried out for characteristics of selling sex and risk factors. Three groups of adolescents were categorized according to their motives for selling sex: Adolescents reporting; 1) Emotional reasons, being at a greater risk of sexual abuse, using sex as a means of self-injury and having a non-heterosexual orientation. 2) Material but no Emotional reasons, who more often receive money as compensation and selling sex to a person over 25 years of age, and 3) Pleasure or no underlying motive for selling sex reported, who were mostly heterosexual males selling sex to a person under 25 years of age, the buyer was not known from the Internet, the reward was seldom money and this group was less exposed to penetrative sexual abuse or using sex as a means of self-injury. In conclusion, adolescents selling sex are a heterogeneous group in regard to underlying motives.  相似文献   

Neighborhood crime undermines parenting: Violence in the vicinity of households as a predictor of aggressive discipline     

《Child abuse & neglect》2018

Child discipline is a central component of parent-child interactions. Evidence suggests corporal discipline impairs children’s physical, cognitive, and socioemotional development and compromises their future chances, especially since it is more frequently used against at-risk children. Using geocoded data for 1209 children under the age of five and their mothers, this study analyses the relation between the occurrence of crimes in close proximity to households in four major urban municipalities of Colombia and a particularly violent corporal discipline practice: hitting children with objects. Results indicate that exposure to violent crimes, such as homicides and personal injuries, predicts a higher probability of hitting children with objects, even after controlling for a set of individual, family, and neighborhood characteristics. Sensitivity analyses suggest violent crimes are not related to other discipline methods, and less threatening crimes, such as robbery and drug trafficking, are not associated with hitting children with objects. These findings suggest households’ walls are permeable, and outside threats may interfere with families’ dynamics and well-being. Future directions and implications are discussed.  相似文献   

A longitudinal investigation of protective factors for bereaved maltreated youth     

《Child abuse & neglect》2019

BackgroundMaltreated youth are at an elevated risk for the development of problem behaviors. Coping with the death of a family member or close friend during adolescence, referred to as bereavement, is a stressful event that could potentiate risk linked to maltreatment. However, developmental research suggests that youth adjustment is a product of multiple risk and protective factors. Although maltreated youth who experience loss may be particularly vulnerable to behavior problems, personal and contextual factors may attenuate or exacerbate youths’ risk for internalizing and externalizing psychopathology.ObjectiveThe overarching goal of this study is to examine individual, family, and community-level protective factors for maltreated youth who experience bereavement. Specifically, we aim to examine the effect of age 12 bereavement on age 16 internalizing and externalizing psychopathology, and to investigate the moderating role of multi-level protective factors at ages 14 and 16.MethodsThe study consisted of a sample of 800 youth (52.4% female, 45.1% African-American) drawn from the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN), collected from 1998 to 2011.ResultsMaltreated youth who experienced significant loss were at increased risk for externalizing symptoms, compared to non-bereaved maltreated youth (β = 0.085, p < .05). Individual future orientation (β = 0.103, p < .05) family future orientation (β = −0.120, p < .05), parental monitoring (β = −0.123, p< .01), and neighborhood collective efficacy (β = −0.126, p < .01) each significantly moderated the association between bereavement and externalizing symptoms.ConclusionsThese results have implications for future interventions aimed towards reducing problem behaviors in adolescents with a history of child maltreatment and who experience bereavement.  相似文献   

论绿色体育与绿色奥运   总被引：15，自引：0，他引：15  

徐岩  彭小澍 《体育与科学》2003,24(6):18-21

本文采用文献资料、调查访问和综合分析法，以可持续发展的视角，对绿色体育和绿色奥运的理念内涵进行了科学界定，在此基础上提出2008年北京奥运会实现绿色奥运的战略目标及对策。  相似文献   

数字图像水印技术研究     

刘勍  张少刚  王三福 《天水师范学院学报》2006,26(5):40-43

介绍了数字图像水印技术的原理、主要特征,阐述了目前图像水印信号的产生方法,分析了图像水印技术的处理算法,探讨了图像水印技术面临的挑战及其发展趋势。  相似文献   

法国人权保障机制的特色及其对中国的意义     

徐海珍  王丽红  徐晓静 《唐山学院学报》2005,18(4):61-63

我国现阶段在人权保障机制方面还存在很多漏洞,文章试从对法国宪法委员会制度的分析,概括法国人权保障机制的特色,并寻求其对中国在保障人权方面的借鉴意义。  相似文献   

竞技体操保护与帮助和体操技术与器材的关系及其发展特征     

周曰智  朱礼金  吴展 《吉林体育学院学报》2005,21(1):76-77

运用文献资料法和逻辑分析法，指出竞技体操保护与帮助跟竞技体操技术发展、器材发展相互促进，相互联系；归纳了竞技体操保护与帮助的发展具有独特化、交叉化、直观化、精细化和自动化的特征。  相似文献   

加入WTO对中国社会保障制度的影响     

熊汉仙 《华中科技大学学报(社会科学版)》2002,16(3):39-43

构建一个与WTO规则相衔接的社会保障制度，是当前面临的迫切任务，完善社会保障体系还有不少困难，与WTO规则相衔接，任务还很艰巨，必须认真对待并认真加以解决，以解决城市目前社会保障负担沉重，社保资金压力巨大，法制建设滞后的矛盾，进一步增强城市社会保险抗风险能力，不断完善与WTO规则相适应的社会保障制度。  相似文献   

举办大型运动会与城市生态环境保护的探讨   总被引：5，自引：0，他引：5  

翁锡全  吴燕波  林文弢  王玉昕 《体育与科学》2003,24(5):53-55

研究采用实地考察、文献分析以及生态学、城市规划、环境保护基本原理等。通过研究大型运动会城市生态环境问题的产生、特点和表现，提出举办大型运动会与城市生态环境保护协调措施。认为，大型运动会引起城市生态环境的问题主要表现在：(1)体育场馆设施建设；(2)建材的使用与废弃；(3)城市环境污染；(4)场馆设施与交通能源利用；(5)体育场馆设施赛后利用等。在举办大型运动会中，要确保城市生态环境的可持续发展，一是制定大型运动会城市生态环境保护具体规划，二是促进公众参与，加强城市环境治理。  相似文献