家蚕bHLH转录因子BmASCa_4基因的生物信息学分析及功能预测

家蚕的基因测序工作已于2003年10月完成,但是对于其bHLH转录因子BmASCa4基因的生物信息学分析及功能预测鲜有报道。文章利用生物信息学的方法,就家蚕bHLH转录因子BmASCa4基因结构及功能进行了分析,研究结果表明：家蚕bHLH转录因子BmASCa4基因结构信息只来自一条EST序列,该基因在编码区内无内含子;BmASCa4由l＇sc基因编码,在促进神经前体的形成中发挥作用。     

多媒体通信网络边缘实施策略研究

多媒体通信网络具有连接通信主机、数位设备多和业务种类多等特点。因为IPv4地址面临枯竭,IPv6地址使用迫在眉捷。利用现有IPv4网络为承载网络,在边缘网络实现IPv6化,是当前解决IPv4地址严重不足的一种解决方法。为了实现IPv4与IPv6的业务服务兼容,可以6to4和区分服务来解决两类地址转换引起的服务质量问题。     

Managing the teaching–research nexus: ideals and practice in research-oriented universities

This paper demonstrates that while ideals of close linkages between research and teaching are widely embraced in research-oriented universities, a practice of division of labour between teaching-oriented and research-oriented staff persists. In an investigation of how the research–teaching nexus is managed at three Swedish universities, we identify a perceived misalignment between institutional incentives for individual academic staff and the needs of teaching. Under pressure from such tensions, managers are forced to deploy pragmatic strategies for the staffing of undergraduate education tasks. This includes allowing research needs and agendas to take priority over teaching needs. While managers seek to secure the participation of senior researchers in education, they often actively prefer to delegate the bulk of teaching activities to less research-active staff. Such strategies seem to reinforce existing patterns of division of labour among academic staff.     

What do families of the ‘professional and managerial’ class educate their children for? The links between happiness and autonomy

Based on a qualitative study involving 124 professional and managerial class families in Catalonia (Spain), this paper describes the aims and objectives these families have for the education of their children. During the fieldwork, when asked what they were aiming for in the education of their children, almost all of the parents replied ‘for them to be happy’. But what kind of happiness are they talking about? What kind of education might lead to happiness? Drawing principally on the work of Kellerhals and Montandon and their ‘contractual model of education’ and Bauman’s concepts of ‘secondary security’ and ‘homo eligens’, although also taking into account the related contributions of Lareau, Vincent and Ball, Stefansen and Aarseth, and Kusserow, the paper aims to demonstrate the strong connection these families make between happiness and ‘absolute’ autonomy, understood as two sides of the same coin and seen, by the participants, as the guiding principle that should shape the way they bring their children up.     

University–school partnerships: student teachers’ evaluations across nine partnerships in Israel

This article presents and discusses the findings of a study which focused on student teachers’ evaluation of their practice teaching in the context of a university–school partnership model integrated for the first time into the academic programme of a university teacher education department in Israel. A questionnaire was developed to examine the contribution of the major curricular components of the partnership for student teachers’ experience of learning to teach, as evaluated by the student teachers themselves. The questionnaire was delivered to 119 student teachers placed in 9 selected school–university partnerships. The findings of the study underscore the added value of supporting different kinds of mentoring frameworks within university–school partnerships. The international significance of the study is discussed with a focus on implications for emergent tensions, dilemmas and connections between local and global forms of university–school partnerships.     

Effects of learner–instructor relationship-building strategies in online video instruction

Although research has demonstrated that an increased rapport between instructors and learners can positively relate with increased learning gains, perhaps mediated by the positive attitudes toward the course and self-efficacy beliefs in the coursework, little has been done to test what instructional strategies might increase this rapport in online video-based instruction. This study compared online video-based instruction that made use of relationship-building strategies with online video-based instruction that did not use those strategies. The two instructions were identical in every other way. The results show that the attitudes of the college students were positively affected by the relationship building strategies in a statistically significant way (p = .025) and that learning gains were also positively affected at a very near-significant level (p = .052). The implications of the findings are discussed.     

Disability,Stigma and Otherness: Perspectives of Parents and Teachers

This qualitative study explored the perspectives of parents and teachers in the US with regard to the meaning and implications of disability in the context of schoolling, and of raising a child with a disability. The findings revealed broad conceptual differences in the perspectives of these two groups. Teachers’ beliefs were generally consistent with medical model perspectives on disability as biologically defined. Parents’ interpretations, more aligned with a sociocultural paradigm, were situated in the cultural meanings ascribed to disability and linked with issues of stigma, marginalisation and access. The findings also revealed the existence of master narratives on families of children with disabilities, entrenched in assumptions of pathological functioning and negative outcomes among these families. Implications for professional–family partnerships in the education of students with disabilities are discussed.     

Seeing the forest as well as the trees: general vs. specific predictors of environmental behavior

The domain of environmental protection is comprised from many sub-domains as recycling, conserving water, or reducing the consumption of energy. The attitude–behavior gap is partly explained by the gap between the specificity levels of the particular measured behavior and of its antecedent(s). The present study aimed at assessing the effects of general vs. domain-specific behavior’s proximal antecedents included in the theory of planned behavior (TPB) model (intentions, attitudes towards the behavior, subjective norms, and perceived behavioral control) on performance of specific environmental behaviors (EBs) in five environmental sub-domains. We found that in all of the environmental domains examined, a specifically worded TPB model predicted specific behaviors better than a generally worded TPB model did. However, the magnitude of the improvement varied among behavioral domains and the improvement did not arise from the same TPB elements in every domain. The implications for environmental education and for EB research are discussed.