基于风险偏好的信息系统安全技术选择与配置策略研究

以IDSs和人工调查技术组合为例,通过构建博弈模型,分析了风险偏好对信息系统安全技术选择与配置的影响,认为组织风险偏好不仅影响着自身的策略也将影响对方的策略。研究结论显示风险厌恶型组织配置IDS数量并不总是高于风险中立型组织,组织风险偏好对其部署单IDS还是多IDSs甚至无直接影响。同时组织在黑客期望收益很低时对风险厌恶型黑客的人工调查率更高,而在黑客期望收益很高时其对风险中立型黑客的调查率更高。此外,黑客在组织人工调查成本较低时更倾向于入侵风险中立型组织,在人工调查成本很高时更愿意入侵风险厌恶型组织。     

The experiences of deaf and hard of hearing students at a Queensland University: 1985–2005

This article reports on the experiences of deaf and hard of hearing students at a Queensland university, which offers an extensive deaf student support program. Seventy‐two current students and graduates since the program’s inception twenty years ago completed a survey about their experiences, highlights, challenges and use of communication tools and support services at university. Findings indicate, both quantitatively and qualitatively, that students valued the specialised support services they received, although challenges in accessing the academic curriculum remained for many students. In the important area of social factors, many students reported enjoying satisfying friendships and a sense of belonging with other deaf people, often for the first time, while others experienced feelings of social isolation in a largely hearing peer group. Overall, deaf and hard of hearing students who had attended Griffith over the 20 years had a high rate of graduation, comparing favourably with other university students.     

Explorable three‐dimensional digital model of the female pelvis,pelvic contents,and perineum for anatomical education

The anatomy of the pelvis is complex, multilayered, and its three‐dimensional organization is conceptually difficult for students to grasp. The aim of this project was to create an explorable and projectable stereoscopic, three‐dimensional (3D) model of the female pelvis and pelvic contents for anatomical education. The model was created using cryosection images obtained from the Visible Human Project, in conjunction with a general‐purpose three‐dimensional segmentation and surface‐rendering program. Anatomical areas of interest were identified and labeled on consecutive images. Each 2D slice was reassembled, forming a three‐dimensional model. The model includes the pelvic girdle, organs of the pelvic cavity, surrounding musculature, the perineum, neurovascular structures, and the peritoneum. Each structure can be controlled separately (e.g. added, subtracted, made transparent) to reveal organization and/or relationships between structures. The model can be manipulated and/or projected stereoscopically to visualize structures and relationships from different angles with excellent spatial perception. Because of its ease of use and versatility, we expect this model may provide a powerful teaching tool for learning in the classroom or in the laboratory. Anat Sci Educ. © 2010 American Association of Anatomists.     

A comparison of the anticipated benefits and received outcomes of pediatric cochlear implantation: parental perspectives

Findings of a study that investigated parents' expectations and experiences of their children's outcomes with cochlear implants are presented. A survey completed by 247 parents whose children had received implants in eastern Australia compared parents' reports of their preimplant expectations with their experiences of postimplant outcomes on several items related to communication, academic, and psychosocial domains. Quantitative findings derived from the survey data were extended and elaborated on by qualitative findings from interviews with 27 of the parents. The findings indicated that parents' relatively high expectations of their children's outcomes largely had been met, although a tenth of survey respondents reported that their expectations had not been met. It appeared that professionals generally provided parents with realistic expectations. The qualitative findings revealed a complex interaction among parents' expectations, hopes, and determination that their children would do well with the implant. Implications for professionals are discussed.     

IT能力与企业可持续发展绩效的关系研究——以业务流程敏捷性为中介变量

信息技术（IT）的快速发展对于实现企业的可持续发展机遇与挑战并存。信息技术的运用一方面会导致能源消耗、社会分化,另一方面绿色技术创新也为可持续发展提供了现实可能。但现有文献对IT能力的可持续发展价值及其过程研究较为匮乏。本文根据资源基础观,构建企业可持续发展绩效的整合模型。以214家汽车制造企业为样本,运用结构方程模型实证分析了IT能力对经济、社会和环境多层面可持续发展绩效的全面影响及其内在机制。实证结论发现IT能力有助于提升企业整体绩效表现,促进可持续发展绩效;业务流程敏捷性是IT能力重塑企业的关键环节,对于IT能力与可持续发展绩效之间的关系具有显著的中介效应。最后,本文基于上述研究发现提出相应的管理启示和未来方向。     

A hybrid microfluidic platform for cell-based assays via diffusive and convective trans-membrane perfusion

We present a novel 3D hybrid assembly of a polymer microfluidic chip with polycarbonate track-etched membrane (PCTEM) enabling membrane-supported cell culture. Two chip designs have been developed to establish either diffusive or convective reagent delivery using the integrated PCTEM. While it is well suited to a range of cell-based assays, we specifically employ this platform for the screening of a common antitumor chemotoxic agent (mitomycin C – MMC) on the HL60 myeloid leukemia cell line. The toxic activity of MMC is based on the generation of severe DNA damage in the cells. Using either mode of operation, the HL60 cells were cultured on-chip before, during, and after exposure to MMC at concentrations ranging from 0 to 50 μM. Cell viability was analysed off-chip by the trypan blue dye exclusion assay. The results of the on-chip viability assay were found to be consistent with those obtained off-chip and indicated ca. 40% cell survival at MMC concentration of 50 μM. The catalogue of capabilities of the here described cell assay platform comprises of (i) the culturing of cells either under shear-free conditions or under induced through-membrane flows, (ii) the tight time control of the reagent exposure, (iii) the straightforward assembly of devices, (iv) the flexibility on the choice of the membrane, and, prospectively, (v) the amenability for large-scale parallelization.     

Who's Responsible for the Digital Divide? Public Perceptions and Policy Implications

Addressing the reasons for—and the solutions to—the “digital divide” has been on the public agenda since the emergence of the Internet. However, the term has meant quite different things, depending on the audience and the context, and these competing interpretations may in fact orient toward different policy outcomes. The goals of this article are twofold. First, the authors unpack the term “digital divide” and examine how it has been deployed and interpreted across a range of academic and policy discourses. Second, through a framing experiment embedded within a nationally representative survey, the authors demonstrate how presenting respondents with two different conceptual frames of the digital divide may lead to different perceptions of who is most accountable for addressing the issue. From this, they discuss the dynamic relationship between the construction and communication of policy discourse and the public understanding of the digital divide, as well as implications for effective communication about the digital divide and information and communication technology policy to the general public.     

Curriculum,pedagogy and assessment: three message systems of schooling and dimensions of quality physical education

This paper identifies ‘quality’ as an internationally relevant concept to be problematised in contemporary debates about physical education (PE). Drawing on the conceptualisation of curriculum by B. Bernstein in 1977, pedagogy and assessment as three inter-related message systems of schooling, the paper presents and explores curriculum, pedagogy and assessment as three fundamental dimensions of ‘quality PE’. Discussion addresses what quality in each dimension may mean in PE, and demand in practice. Contemporary initiatives in Australia and New Zealand provide a reference point for exploring the prospective application of quality conceptualised in terms of the three inter-related dimensions. Attention is drawn to frameworks in mainstream education that may be utilised in endeavours to critically review current practices, and inform developments directed towards achieving quality in PE. It is argued that achieving quality in PE requires that quality is pursued and demonstrated within and across curriculum, pedagogy and assessment, and that meanings of quality always need to be contextualised in cultural, social and institutional terms.     

鄂西土家族五句子情歌的民族文化特征

鄂西土家族民歌丰富多彩,其间积淀着丰厚的土家民族文化精髓。在形式多样的民歌当中,五句子情歌以其格调的特别、结构的独特和内容的丰富而成为鄂西土家族民歌中最为发达的样式。从五句子情歌的地理属性、文化内涵、结构形式和文化功能等角度,可以探寻五句子情歌所体现的土家族民族文化特征。