髋关节滑膜皱襞生长发育的应用解剖学研究   总被引：3，自引：0，他引：3  

傅之屏  赵铀  彭明惺  彭庆恩 《绵阳师范学院学报》1994,(Z1)

木文对胎儿、儿童和成人三个年龄组,总计126侧髋关节进行了解剖学观测.发现片状滑膜皱襞在胎儿5月龄时就已经发生,绒毛状皱襞则在儿童早期才开始出现.并发现滑膜皱襞伴随着机体的生长发育,形态逐渐增大,数量逐渐增多,直到成年期方趋于稳定.同时发现,髋关节的滑膜皱襞(唇外皱襞)主要分布在三个部位:股骨头韧带的基部、髋臼唇外缘和股骨颈滑膜反折处.特别是髋臼唇外缘的滑膜皱襞有少数(9.52%)嵌入头臼之间的缝隙之中,作者认为唇外皱襞(C皱襞)是导致儿童髋关节滑膜皱襞综合症的形态学基础.  相似文献   

Letters to the Editor     

Clare Lee  Karen L. Westberg  Sally M. Dobyns  Francis X. Archambault Jr.  Scott W. Brown  James R. Delisle 《Roeper Review》2013,35(1)

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Research reports     

Frank E. X. Dance 《Communication Studies》2013,64(1):50-55

This essay examines the “jurisprudential analogy” offered by Toulmin and Perelman as a conceptual framework for the study of argument. An attempt is made to assess the impact of such a juridical model upon the new rhetoric.  相似文献   

Deciding How Much to Share in Class: A Study of the Experiences of Students of Color Enrolled in Multicultural Counseling Courses     

Derek X. Seward  Douglas A. Guiffrida 《International journal for the advancement of counseling》2012,34(4):286-296

This qualitative study investigated the experiences of Students of Color in multicultural counseling courses in relation to classroom participation. Results suggest several complex tensions that Students of Color experience when deciding whether and how much to participate in class. Implications for multicultural training are provided.  相似文献   

Faculties of education and institutional strategies for knowledge mobilization: an exploratory study     

Creso M. Sá  Sharon X. Li  Brenton Faubert 《Higher Education》2011,61(5):501-512

The goal to enhance the impacts of academic research in the ‘real world’ resonates with progressive visions of the role of universities in society, and finds support among policy makers who have sought to enhance the ‘transfer’, ‘translation’, ‘uptake’, or ‘valorization’ of research knowledge in several areas of public services. This paper reports on an exploratory study of the strategies used by selected Canadian and international faculties of education to mobilize research knowledge. Drawing on data from semi-structured interviews with senior administrators of 13 faculties of education, the analysis reveals several themes. Academic leaders recognize knowledge mobilization as a desirable institutional mission, but they identify a number of barriers to greater efforts in this area. Although a number of strategies are employed, changes across multiple organizational dimensions to encourage and support knowledge mobilization were reported at only two institutions. These results are relevant to faculty administrators, scholars, and policy-makers interested in understanding the role of academic institutions in the mobilization of research knowledge to the broader education community.  相似文献   

Microfluidics based on ZnO/nanocrystalline diamond surface acoustic wave devices   总被引：1，自引：0，他引：1  

Fu YQ  Garcia-Gancedo L  Pang HF  Porro S  Gu YW  Luo JK  Zu XT  Placido F  Wilson JI  Flewitt AJ  Milne WI 《Biomicrofluidics》2012,6(2):24105-2410511

Surface acoustic wave (SAW) devices with 64 μm wavelength were fabricated on a zinc oxide (ZnO) film deposited on top of an ultra-smooth nanocrystalline diamond (UNCD) layer. The smooth surface of the UNCD film allowed the growth of the ZnO film with excellent c-axis orientation and low surface roughness, suitable for SAW fabrication, and could restrain the wave from significantly dissipating into the substrate. The frequency response of the fabricated devices was characterized and a Rayleigh mode was observed at ∼65.4 MHz. This mode was utilised to demonstrate that the ZnO/UNCD SAW device can be successfully used for microfluidic applications. Streaming, pumping, and jetting using microdroplets of 0.5 and 20 μl were achieved and characterized under different powers applied to the SAW device, focusing more on the jetting behaviors induced by the ZnO SAW.  相似文献   

Teaching Information Systems Management Skills: Using Integrated Projects and Case Studies     

R. J. Whiddett  B. X. Jackson  J. A. Handy 《Computer Science Education》2013,23(2):165-177

University courses in Computer Science (CS) and Information Systems (IS) are often criticized by industry for concentrating on conceptual learning while failing to provide their students with experience and grounding in managerial skills. This paper describes and discusses an innovative course In this paper the term “course” will be used to refer to a single integrated unit of study. In New Zealand such units are often referred to as “papers”. These courses can be combined together, according to various rules, to form a “course of study” which will lead to a qualification. At Massey University, a degree is comprised of 24 such courses.structure which has been developed in order to ground the teaching of IS management theory in its local context by interlinking practical projects and case studies in local organizations. The student projects are used to generate a large “cross-sectional” case study which describes several IS management problems that are occurring simultaneously in the same organization. Students are required to integrate their analysis of the problems and to recommend an appropriate series of responses which will tackle all the situations. The paper describes the rationale and organization of the course, the results of an evaluation of its effectiveness, and discusses some of the problems that were encountered during its implementation.  相似文献   

Observation of hydrophobic-like behavior in geometrically patterned hydrophilic microchannels     

Parikesit GO  Vrouwe EX  Blom MT  Westerweel J 《Biomicrofluidics》2010,4(4):44103

We present our observation of meta-hydrophobicity, where geometrically patterned surfaces make hydrophilic microchannels exhibit hydrophobic-like behaviors. We analyze the wetting-induced energy decrease that results from the surface geometries and experimentally demonstrate how those geometries can modulate the dynamics of capillary-driven wetting and evaporation-driven drying of microfluidic systems. Our results also show that the modulated wetting dynamics can be employed to generate regulated patterns of microbubbles.  相似文献   

Tunable visual color filter using microfluidic grating     

Li ZG  Yang Y  Zhang XM  Liu AQ  Zhang JB  Cheng L  Li ZH 《Biomicrofluidics》2010,4(4):43013

This paper reports a tunable visual color filter based on a microfluidic transmission grating. The grating lines are formed by the microflows in an array of evenly spaced straight microchannels. In experimental study, the transmission of white light measures a shift of visual color from red to blue in the zeroth order diffraction in response to a change of the refractive index from 1.3290 to 1.3782 in the microflows. The merit of large tunability of transmission peak (Δλ=408 nm) makes this grating potential for various applications in biological and chemical measurements, such as space- and time-resolving micropattern spectrophotometers and separation of the fluorescence from the excitation.  相似文献   

The effects of verbal reward on the behavior of children in the primary grades at a cognitive task typical of the new elementary science curricula     

Francis X. Lawlor 《科学教学研究杂志》1970,7(4):327-340

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