五次对称准周期晶格的电子状态结构研究

文中对计算电子结构的集团Ｂｅｔｈｅ晶格方法进行了改进。简化了原子集团的选取方式，提出了求解复数Ｄｙｓｏｎ方程组的矩阵解方法和平均集团Ｂｅｔｈｅ晶格方法。研究了Ｐｅｎｒｏｓｅ　ｔｉｌｉｎｇ的局部、整体和平均电子状态密度。发现了Ｐｅｎｒｏｓｅ　ｔｉｌｉｎｇ的局部电子状态密度对准周期点阵的长程有序性特别敏感的性质。提出了计算Ｐｅｎｒｏｓｅ　ｔｉｌｉｎｇ局部及整体电子状态密度应遵循的原则．得出了某些合金的准晶相可能是电子化合物的结论。     

Write this way: examining teachers’ supportive strategies to facilitate children’s early writing in preschool

Reading and Writing - Writing is essential for communication in literate societies, and its successful acquisition and development is central to academic achievement. Beginning in early childhood,...     

由非线性粒子运动方程导出薛定锷方程

本文将由非线性量子动力学方程同时导出薛定锷方程和牛顿方程．这样就不仅证明了经典力学与量子力学已被统一了起来，且证明了薛定锷场(波函数)不是非物质性的几率波．而是刻出物质性背景空间性质的物质性场．     

Microfluidics based on ZnO/nanocrystalline diamond surface acoustic wave devices

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.     

Almost sure weak exponential stability with a certain decay function of semilinear stochastic evolutionequations

In this paper the weak exponential stability with decay function of sample path, which are given by mild solution to a class of semilinear stochastic evolution equations, are presented. The analyses consist in using exponential martingale formula, Lyapunov functional and some special inequalities derived for our stability purposes. Two examples are given to illustrate the theory.     

A microfluidic shear device that accommodates parallel high and low stress zones within the same culturing chamber

Fluid shear stress (FSS) plays a critical role in regulating endothelium function and maintaining vascular homeostasis. Current microfluidic devices for studying FSS effects on cells either separate high shear stress zone and low shear stress zone into different culturing chambers, or arranging the zones serially along the flow direction, which complicates subsequent data interpretation. In this paper, we report a diamond shaped microfluidic shear device where the high shear stress zone and the low shear stress zone are arranged in parallel within one culturing chamber. Since the zones with different shear stress magnitudes are aligned normal to the flow direction, the cells in one stress group are not substantially affected by the flow-induced cytokine/chemokine releases by cells in the other group. Cell loading experiments using human umbilical vein endothelial cells show that the device is able to reveal stress magnitude-dependent and loading duration-dependent cell responses. The co-existence of shear stress zones with varied magnitudes within the same culturing chamber not only ensures that all the cells are subject to the identical culturing conditions, but also allows the resemblance of the differential shear stress pattern in natural arterial conditions. The device is expected to provide a new solution for studying the effects of heterogeneous hemodynamic patterns in the onset and progression of various vascular diseases.     

A Culturally Responsive Intervention for Addressing Problematic Behaviors in Counseling Students

Counseling faculty serve as gatekeepers to protect the public from trainees who demonstrate significant deficiencies in professional functioning. Two issues that have not been thoroughly examined are how different cultural values may intersect with the assessment of appropriate professional competencies and whether the multicultural environment of programs is considered when assessing potentially problematic students. The authors suggest a group systems intervention and provide implications and recommendations for counselor educators.     

Socialization of graduate teaching assistants: a case study in an American university

Although graduate teaching assistants [GTAS] play an important role on most American university campuses, and despite the fact that the GTA experience is often the only formal professional training that faculty receive, little is known about how GTAS are prepared for their role. One of the most enigmatic processes related to GTA role development is that of socialization. This paper reports the results of a study examining the types of messages that new GTAS receive about their role and the manner in which particular types of communication strategies are used to cope with inconsistencies and conflicts among those messages. It was found that GTAS are exposed to thematic messages about what it means to be a GTA, that they experienced difficulties when attempting to use those messages to guide behavior and decision‐making, and that information‐seeking strategies were used in response to the specific types of problems that were experienced.