Strategies and cues adolescents use to assess the age of an online stranger

A common risk among adolescents is sexual solicitation, in which an adolescent is asked to provide sexual information, engage in sexual talk, or in sexual activities. Although scholars increasingly address this topic from an intrapersonal perspective, there is little attention to factors of language use and message content. In two focus group studies, we investigated whether adolescent girls consider themselves capable of assessing whether an online stranger is an adult or a peer, the extent to which adolescent girls actually succeed in making this assessment, the strategies they apply to do so, and the content- and language-related cues focused on. Our findings suggest that most of the adolescent girls are confident in their ability to assess whether the stranger is a peer or an adult with possible sexual intentions. However, we also found that only 43% were able to correctly make this assessment. Most of the adolescents seem to apply the passive strategy of uncertainty reduction: They scan the profile page of the stranger, check contact information, and the profile picture. They may choose to apply the interactive strategy to find out more about the online stranger. Important content-related cues that alarm adolescent girls are: ignoring personal questions, showing an exaggerated amount of interest, acting as a friend, and being sexually oriented. Language cues mentioned related to word usage, abbreviations, sentence length, and tone.     

基于功率约束及节点频谱选择的认知协同路由

为了提升认知无线网络的数据传输效率,优化节点能量负载,提出一种协同路由算法。基于覆盖与底层技术的协作设计一种协同网络架构,该架构针对网络频带表现多样化提供了一种新的频谱选择策略,提升频谱资源效用。结合协同网络频谱选择时的干扰特性,根据频谱、干扰和功率约束关系,提出最大化链路容量的频谱及节点功率分配方法。在协同路由设计上引入了频谱效用参数,参数的度量标准涉及节点剩余能量和链路容量,以优化路由节点能量负载和传输效率为目的。仿真对比结果表明,算法有效地利用信道接入机会进行数据转发,提高了传输效率,相比基于竞争进化算法的多播路由方法,数据包传递成功率提升了1．4％,平均网络吞吐量高出8．4％,平均节点剩余能量高出3．2％,在均衡节点负载上性能良好。     

Theorizing the social: Émile Durkheim's theory of force and energy

This paper offers a new interpretation of Émile Durkheim's The Elementary Forms of Religious Life (1912) as the basis for reconsidering the Tarde–Durkheim debate of 1903 and the distinctions between a theory of social force and a theory of social assemblage. Resisting traditional interpretations of Durkheim's scientism, this essay traces how concepts of force and energy are centrally developed in Elementary Forms to draw new lines between epistemology to ontology for twentieth-century theory. I argue that Durkheim develops an ‘energetic epistemology’ that conceives of the human capacity for shared meaning as a product of invested energy in the form of continually enacted and evolving material practice, thought, and attention. According to Durkheim, when a member of a collective perceives a god or feels belief, he or she actually perceives the accumulated energy of on-going creation and maintenance of objects and ideas by members of a collective. Sacred objects, images, and ideas bear the trace of collective energy the more they are carefully crafted, maintained in spaces that are specially arranged, and written into behavioural codes. This reading of Durkheim allows us to consider him in a lineage of social constructivists and, particularly, in relation to Ludwik Fleck, who has been largely confined to different theoretical discussions when his contributions to sociology have been acknowledged at all. By reconsidering Durkheim, we have occasion to rethink his sociology and understand how he redrew the lines between thought and action, between epistemology and ontology, through the material framework of energy and force.     

Asking about the future: methodological insights from energy biographies

Temporality is fundamental to qualitative longitudinal (QLL) research, inherent in the design of returning to participants over time, often to explore moments of change. Previous research has indicated that talking about the future can be difficult, yet there has been insufficient discussion of methodological developments to address these challenges. This paper presents insights from the Energy Biographies project, which has taken a QLL and multimodal approach to investigating how everyday energy use can be understood in relation to biographical pasts and imagined futures. In particular, we detail innovative techniques developed within the project (e.g. SMS photograph activities) to elicit data on anticipated futures, in ways that engender thinking about participants’ own biographical futures and wider societal changes. We conclude by considering some of the significant benefits and challenges such techniques present. These methodological insights have a wider relevance beyond the substantive topic for those interested in eliciting data about futures in qualitative research.     

中国石油战略安全因素分析

伴随着中国经济的快速崛起,中国能源战略安全问题逐渐突显出来。避免能源引发的国家冲突,制定有效的能源战略,这是我国政府十分重视的国家安全的战略问题。论文从国际关系和地缘政治的角度分析出发,在分析了4大国能源战略的基础上,提出了解决中国能源战略安全的基本思路:构建和谐的中美关系;加大石油储备量以防台海有事;积极建立与印度的友好关系突破美国的战略封锁;积极发展中日之间的能源合作;加强对俄罗斯的能源合作的工作力度。     

长三角地区能源效率及其影响因素分析

当前我国生产领域中的能源效率远低于发达国家,而长江三角洲是我国主要能耗地区,提高长三角地区的能源效率具有重要的现实意义。选取了长三角内部三省市14年的面板数据,利用能源强度评价长三角地区能源利用现状,通过实证分析长三角内部各省市的能源效率影响因素,结果发现产业结构和市场化程度对能源效率具有正面影响,外向化程度对能源结构具有负面影响。     

Resolutions: Working with Families Where Responsibility for Abuse is Denied

Current thinking suggests that little productive work can be undertaken with families where serious physical or sexual abuse of children has occurred in the absence of a clear acceptance of responsibility for that abuse. This means that children are often removed from their families because of the perceived risks, with the disadvantages that being looked after in local authority care often brings. Alternatively, children may be left in the same environment where serious abuse has taken place with little or no work being undertaken with the family. Either approach fails children, especially those who have made clear and believable allegations in the hope of bringing about a process of change and protection. This article describes the work of a pilot project at the Avon NSPCC in Bristol working with families where the alleged abuser disputes responsibility for maltreating the child. Key to this approach is the support of the non-abusing carer and the child/ren while the concerns of the professional agencies are addressed. The work has two main phases. The first looks for structural change in the organization of family life. The second part asks carers to role-play a ‘similar’ hypothetical family where child abuse has been established. This enables difficult issues raised by the abuse to be addressed and provides an opportunity for carers to express thoughts and feelings to their partner regarding abuse without the seriousness of the concerns being lost.     

论转基因生物技术的安全性及其法律规制

转基因生物技术可能引发对环境、生态、生命、健康及和平的安全问题,必须引起足够的重视,以法律予以规制。在比较分析国内外相关立法例的基础上,提出构建我国生物技术安全法体系的构想。     

东北亚区域能源合作研究

在经济全球化背景下,各国在能源领域的相互依赖性不断加强。在东北亚地区东北亚能源需求急剧增加、东北亚地区能源进口依存度高和能源引起的环境保护问题日益突出的条件下,东北亚地区必须通过区域范围的能源合作来保障能源安全。东北亚区域必须依靠地缘优势和日益紧密的经济联系,通过协商和协议进行能源合作,以保障各国的能源安全和共同利益。虽然目前东北亚区域能源合作受各种因素的影响,进展较为缓慢,但合作前景非常广阔,东北亚区域能源合作可以在许多重点领域展开。     

食品安检专业开设动物病理学课程的改革与探索

本文从专业现状及教学中存在的问题,对食品安检专业开设动物病理学课程的教学改革相关问题进行阐述,为全面培养高素质的食品安检专业人才提供经验。