A facile UV-curing method for the preparation of transparent and conductive carbon nanotube hybrid films

A new method for preparing flexible, transparent, and conductive multiwalled carbon nanotube (MWCNT) hybrid films with scratch resistance through a facile UV-curing method is described herein. UV-curable urethane oligomers were used as the binder between the MWCNTs and the plastic substrates. The transparency and sheet resistance of MWCNT thin films can be easily tailored by controlling the number of bar coaters. Composite films with different binder ratios were prepared to evaluate and optimize the surface abrasion resistance and adhesion parameter. Two types of MWCNT films, those with a 56% (with a 586 komega/sq sheet resistance) and a 78% transmittance (with a 22 Momega/sq sheet resistance) were obtained using the UV-curable resin, and the conductive films showed distinguished abrasion resistance and good adhesion.     

Modulatory effect of S-allylcysteine on glucose metabolism in streptozotocin induced diabetic rats

The antihyperglycemic effect of S-allylcysteine (SAC) on normal and streptozotocin (STZ) diabetic rats was investigated. Diabetes was induced into male albino Wistar rats by intraperitoneal administration of STZ. The SAC was administered orally (150 mg/kg bw) to normal and STZ-diabetic rats for 45 days. The diabetic rats showed an increase in levels of blood glucose. In addition, diabetic rats showed a significant reduction in the activity of hexokinase, glycogen synthase, liver glycogen and an elevation in the activities of enzymes such as glucose-6-phosphatase, fructose-1,6-bisphosphatase and glycogen phosphorylase. Treatment with SAC significantly decreased blood glucose and. SAC administration to diabetic rats reversed these enzyme activities in a significant manner. Thus, the results show that SAC possesses an antihyperglycemic activity and provide evidence for its traditional usage in the control of diabetes.     

针对下一代DSL接入架构的先进流量管理芯片组

当今针对高速因特网接入的DSL架构是基于异步传输模式(ATM)的。静态提供的ATM固定虚拟连接(PVC)可提供从用户端设备(CPE)、经数据链路控制(DLC)或数字用户线接入复用器(DSLAM)到宽带远程接入服务器(BRAS)的连接。高速因特网接入通常是一种在任何时候都依赖网络使用情况的“尽力而为的服务”。为了与有线及卫星公司进行有效的竞争,DSL提供商正在考虑支持新的服务,如付费VoIP及视频、互动游戏、视频聊天和电影下载。要大规模进行部署,这些新一代的服务需要动态的提供、区分流量传输、可变的速度和服务质量(QoS)的保证。传统的基…     

Intimate culture of families in the early socialization of literacy.

The intimate family culture for early literacy socialization was documented for a socioculturally heterogeneous sample of 66 children enrolled in pre-kindergarten through third grade at public elementary schools in a large U.S. city. Parents were interviewed about 3 types of indexes of their family's intimate culture: the child's engagement in various literacy-related activities at home, the parents' orientation towards the significance of literacy for early child development, and the family's routines of dinnertime, reading aloud, and doing homework for school. Basic reading competencies were assessed with the Woodcock-Johnson Psychoeducational Battery--Tests of Achievement, Revised Papers. Multiple regression analysis found that a significant proportion of variance in the children's literacy development was predicted by each of the quantitative indexes of intimate family culture, leaving little or no additional variance that was due to family income or ethnicity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Vibratory conveying—analysis and design: A reviewSchwingförderung—analyse und konstruktion: eine übersicht

One of the industrial applications of vibration is its use for conveying materials. Investigations into the phenomenon of vibratory conveying started about three decades back. This report is a review of the published papers in the area of vibratory “jump” conveying. While many have contributed to understand the phenomenon of vibratory conveying, there is still vast scope for work on the dynamics and design aspects of the vibratory conveyor.     

Forward and Inverse Potential Field Solutions for Cardiac Strands of Cylindrical Geometry

This paper deals with the classical forward and inverse volume conductor field problems associated with the isolated active cardiac muscle preparations of cylindrical geometry. Specifically, these are the Purkinje fiber, the atrial trabeculum, and the (idealized) single atrial cell. The electrical behavior of the multicellular preparations (Purkinje strand and atrial trabeculum) is modeled in terms of the electrical activity of an equivalent single cell, with a representative membrane that separates an anisotropic intracellular medium from an isotropic extracellular medium. The isolated single atrial fiber is considered an interesting special case anid is modeled in an idealized sense as a long cylindrical cell with an isotropic internal medium. A model based on potential theory is developed for the equivalent cardiac cell; it is based on a solution of Laplace's equation in the media of interest, subject to appropriate boundary conditions. The solution for potential at an arbitrary point in the extracellular medium is in the form of a Fourier integral; the equation is subsequently reformulated into a more convenient computational form using a discrete Fourier transform (DFT) method. Implementation of this method, using a fast Fourier transform (FFT) technique, results in a fast and efficient numerical algorithm for the calculation of volume conductor potentials. A benefit of this approach is that the classical forward and inverse problems in electrophysiology may be viewed as equivalent filtering problems.     

Failure analysis of laminated composite cylindrical/spherical shell panels subjected to low-velocity impact

A 4-noded, 48 d.o.f. doubly curved quadrilateral shell finite element based on Kirchhoff–Love shell theory, is used in the nonlinear finite element analysis to predict the damage of laminated composite cylindrical/spherical shell panels subjected to low-velocity impact. The large displacement stiffness matrix is formed using Green's strain tensor based on total Lagrangian approach. An incremental/iterative scheme is used for solving resulting nonlinear algebraic equations by Newton–Raphson method. The damage analysis is performed by applying Tsai–Wu quadratic failure criterion at all Gauss points and the mode of failure is identified using maximum stress criteria. The modes of failure considered are fiber breakage and matrix cracking. The progressive failure analysis is carried out by degrading the stiffness of the material suitably at all failed Gauss points. The load due to low-velocity impact is treated as an equivalent quasi-static load and Hertzian law of contact is used for finding the maximum contact force. After evaluating the nonlinear finite element analysis thoroughly for typical problems, damage analysis was carried out for cross-ply and quasi-isotropic cylindrical/spherical shell panels.     

Hierarchical congregated ant system for bottom-up VLSI placements

A new perturbation method, called Hierarchical-Congregated Ant System (H-CAS) has been proposed to perform the variable-order bottom-up placement for VLSI. H-CAS exploits the concept of ant colonies, where each ant will generate the perturbation based on differences in dimensions of the VLSI modules in hard modules floorplanning and differences in area of the VLSI modules in soft modules floorplanning. In this paper, it is mathematically proved that the area-based two-dimensional cost function for hard modules floorplanning problem can be reduced to the difference-based one dimensional cost function which avoids local optima problems. Lack of global view is a major drawback in the conventional bottom-up hierarchy, and hence, ants in the H-CAS are made to introduce global information at every level of bottom-up hierarchy. A new relative whitespace formula for bottom-up hierarchy is derived mathematically and the H-CAS embeds it in its unique update formula. The ants in H-CAS are able to communicate among themselves and update the pheromone trails when they reach the destination. Then, the ants will congregate, share their experiences and construct a new pheromone trails that belong to this newly constructed group. The congregation of at least two ants and/or ant consortiums would lead to reduction in subsequent search space and complexity. H-CAS gives the best-so-far near optimal solutions and yields low standard deviations of areas involving 9–600 blocks based on Microelectronics Center of North Carolina (MCNC) and Giga scale Systems Research Center (GSRC) benchmarks. The results obtained establish that H-CAS is a high performance placer in respect of scaling, convergence, precision, stability, and reliability. The above claims are based on the comparisons with the other floorplanning algorithms as depicted graphically.