面向知识管理的国家科研项目集成化文件管理体系构建研究:背景、框架及模型

本文提出了开展面向知识管理的国家科研项目集成化文件管理体系构建研究的设想及其理论模型,以支持具有跨部门和跨系统管理特点,多元化和多层次服务特征的国家科研项目知识积累、共享、交流和创新：为科研项目全生命期的知识资产动态捕获、增值保存和有效复用,文件流、知识流和和科研工作流无缝集成提供理论与应用支持,以完善我国国家科技创新体系,提高基于证据的国家科研项目治理水平。     

Links between early rhythm skills, musical training, and phonological awareness

A small number of studies show that music training is associated with improvements in reading or in its component skills. A central question underlying this present research is whether musical activity can enhance the acquisition of reading skill, potentially before formal reading instruction begins. We explored two dimensions of this question: an investigation of links between kindergartners’ music rhythm skills and their phonological awareness in kindergarten and second grade; and an investigation of whether kindergartners who receive intensive musical training demonstrate more phonological skills than kindergartners who receive less. Results indicated that rhythm skill was related to phonological segmentation skill at the beginning of kindergarten, and that children who received more music training during kindergarten showed improvement in a wider range of phonological awareness skills at the end of kindergarten than children with less training. Further, kindergartners’ rhythm ability was strongly related to their phonological awareness and basic word identification skills in second grade. We argue that rhythm sensitivity is a pre-cursor skill to oral language acquisition, and that the ability to perceive and manipulate time intervals in sound streams may link performance of rhythm and phonological tasks.     

Tool selection and collision-free in 5-axis numerical control machining of free-form surfaces

The methodology of 5-axis cutter selection to avert collision for free-form surface machining by flat-end cutters is presented.The combination of different cutters is adopt aiming at short machining time and high precision.The optimal small cutter is determined based on the geometric information of the points where a cutter most probably collide with the machined surface.Several larger cutters are slected to machine the surface in order to find the interference-free area.The difference of machining time for this area between the optimal small cutter and the large cutters is calculated.The functional relationship between the machining time and the radius of a cutter is established,by which the optimal number of cutters is obtained.The combination of cutters,which possesses the minimum overall machining time,is selected as the optimal cutter sizes.A case study has demonstrated the validity of the proposed methodology and algorithms.     

Our Designs and the Social Agendas They Carry

Although the work of learning scientists and instructional designers has brought about countless curricula, designs, and theoretical claims, the community has been less active in communicating the explicit and implicit critical social agendas that result (or could result) from their work. It is our belief that the community of learning scientists is well positioned to build transformative models of what could be, to develop learning and teaching interventions that have impact, and to advance theory that will prove valuable to others. This potential, we argue, would be significantly heightened if we as a community embrace the critical agendas that are central to so many discussions in anthropology, philosophy, or even curriculum development more generally. Instead of simply building an artifact to help individuals accomplish a particular task, or to meet a specific standard, the focus of critical design work is to develop sociotechnical structures that facilitate individuals in critiquing and improving themselves and the societies in which they function, and then we use our understanding of participation with these structures to advance theory. As an example of critical design work, we describe the Quest Atlantis project and the methodology used in its creation.

The philosophers have only interpreted the world, in various ways; the point is to change it. (Karl Marx, 1845/1998)     

两种寄生蜂对柑桔潜叶蛾搜索效应的初步研究

本文初步研究了柑桔潜叶蛾(Phyllocnistis citrella)幼虫寄生蜂(Tetrastichus Phyllocnistoides)和蛹寄生蜂(Cirrospilus quadristriatus)对柑桔潜叶蛾的搜索效应,利用数学模型分析绘制了两种寄生蜂田间搜索效应和寄生蜂种群密度随时间变动三维图。     

中山大学校园白蚁为害林木的调查报告

中山大学校园为害树木的白蚁主要是家白蚁,为害树种达24科36种,其受害率达23.3％,有巢率7.2％。     

中华贝蝽雄虫记述(半翅目:蝽科,蝽亚科)

本文记述中华贝蝽Bathycoelia sinica Zheng et Liu,模式产地广东鼎湖山所采雄虫标本。     

What Do Students Gain by Engaging in Socioscientific Inquiry?

The question of what students gain by engaging in socioscientific inquiry is addressed in two ways. First, relevant literature is surveyed to build the case that socioscientific issues (SSI) can serve as useful contexts for teaching and learning science content. Studies are reviewed which document student gains in discipline specific content knowledge as well as understandings of the nature of science. SSI are also positioned as vehicles for addressing citizenship education within science classrooms. Although the promotion of citizenship goals seems widely advocated, the specifics of how this may be accomplished remain underdeveloped. To address this issue, we introduce socioscientific reasoning as a construct which captures a suite of practices fundamental to the negotiation of SSI. In the second phase of the project, interviews with 24 middle school students from classes engaged in socioscientific inquiry serve as the basis for the development of an emergent rubric for socioscientific reasoning. Variation in practices demonstrated by this sample are explored and implications drawn for advancing socioscientific reasoning as an educationally meaningful and assessable construct.