To Establish the Reference Intervals of Lipid Profile in Punjab

Overnight fasting samples of 1,031 apparently healthy people of Punjab visiting the hospital over a period of 3 years were tested for serum lipid profile. The mean ± SD of serum total cholesterol, triglycerides, high density lipoprotein cholesterol, low density lipoprotein cholesterol and very low density lipoprotein cholesterol in mg/dl were 182.2 ± 33.9, 122.4 ± 33.4, 44.1 ± 6.8, 113.9 ± 32.0, 24.6 ± 7.1 respectively. When these subjects were grouped according to age and sex, no appreciable difference was observed between most of the groups. Serum triglycerides were found to be low and HDL-C was high in females when compared with males of similar age and vice versa. With advancing age, total cholesterol and low density lipoprotein cholesterol levels were found to be higher in women. The present study suggests that the obtained lipid values should be taken into consideration during clinical evaluation.     

Web环境下的个性化信息检索技术

对当前网络环境下应用的若干典型的个性化信息检索技术进行了研究和分析。介绍了个性化信息检索的一般模型，从四个不同的角度对各种个性化检索技术做了分类，列举了主要的个性化检索个案，描述了个性化检索系统的核心模块，并简单介绍了如何提高个性化检索的效率。     

基于用户画像的学术期刊精准服务研究

对学术期刊而言,其价值的实现有赖于用户.构建用户画像能够使学术期刊全方位了解自己的核心读者、作者和专家群体,掌握相关群体的信息,为用户提供精准服务.通过梳理学术期刊精准服务和用户画像理论等相关研究成果,分析基于用户画像理论的学术期刊精准服务的意义、理论内核和价值表征,并阐释其运行机制,最后提出基于用户画像的学术期刊精准...     

基于Z39.50数据库更新扩展服务的联合目录规程*

讨论了一种基于Z39. 50 数据库更新扩展服务的联合目录规程, 它可以确保创建者在本地系统
环境下方便地应用本地的软件进行目录的创建或更新, 为联合目录的高效维护提供了可能。     

Determining optimal trial size using sequential analysis

When characterising typical human movement profiles, the optimal number of trials analysed for each participant should ensure a stable mean. Sequential analysis is one method able to establish the number of trials to stability by assessing a moving point mean against a set bandwidth. As the total trial number determining this bandwidth is selected arbitrarily, the effect of applying different total trial numbers on the results of sequential analysis was investigated. Twenty participants performed 30 trials of overarm throwing, and sequential analyses were applied to three dimensional (3-D) kinematic data over 10, 20 and 30 trial numbers. We found a total of 20 to be the preferred trial number for sequential analyses. Erroneous results were produced consistently by 10 trial number groups, while moving point means were statistically unchanged after the 10th trial. Subsequently, sequential analyses were applied to 20 trials to establish trials to stability in discrete and time series elements of the 3-D kinematic data. The results suggest that a trial size between 13 and 17 provides stable means for overarm throwing kinematics.     

从一流的科学家到卓越的领导者——对美国麻省理工学院校长康普顿的思考

美国麻省理工学院是一所全球知名的研究型大学。作为一名科学家的卡尔·泰勒·康普顿出任了该校第九任校长,在担任校长期间,他对学校进行了大力改革和有效管理:重视基础学科,强化学科联系;倡导学术科研,加强工业研究;限制本科规模,扩大硕博教育;改革管理制度,发挥个人才智;加大教育投入,重视社会需求。这些措施为麻省理工学院的发展和腾飞做出了突出的贡献,也实现了他从一位一流的科学家到卓越的领导者的华丽转身。     

渐开线圆柱齿轮参数化三维实体建模系统研究

通过分析机械零件参数化设计的特点,利用Microsoft Visual Studio和AutoCAD-次开发工具,设计了渐开线圆柱齿轮参数化三维建模软件系统.基于渐开线齿廓曲线的关键算法,根据渐开线极坐标和笛卡尔坐标数学方程,使用旋转和拉伸等三维建模方法完成渐开线齿轮参数化实体建模的程序设计.使用该软件系统,可根据不同结构型号的齿轮几何参数要求,实现单联滑移、双联滑移和轮毂腹板式等常见齿轮的三维实体建模.该系统须在Windows环境下的AutoCAD中运行,具有使用简单、人机界面友好和运行速度快等特点.     

Modeling of a novel fish passage-way using coupled spatially varied flow

An innovative hydraulic structure was proposed for passage of fish in surface water. The structure consisted of identical ‘cells’ throughout its length and was designed to create coupled spatially varied flow for optimization of depth and velocity of water. The objective of this paper was to simulate the hydraulics of a single cell of this fish passage structure. A numerical model was developed to simulate the water surface profiles and longitudinal variation of 1-D velocity through one cell. The transition in the water surface profile between longitudinally adjacent cells (chamber) was also investigated. It was found that numerical convergence was usually achieved after three iterations with 2% discretization. The difference in depth arising from cell vs. chamber analysis was found to be small. The experimental results indicated turbulence in the water surface. The water surface profile matched the results obtained from numerical results. However, there were errors observed in estimation of flow rate. It is concluded that the mathematical approach used for the numerical simulation is reliable and can be used to analyze coupled spatially varied flow for any hydraulic structures aimed at controlling depth and velocity of water. Innovative approach to the interface between can potentially be used to achieve hydraulic goal of any structure.     

非用户模型-信息系统功能方法论

设计符合非用户行为的系统功能,可以增加系统使用率。系统地介绍非用户行为的相关研究,区分非用户的类型,提出非用户行为理论,探讨以临境分析、人物角色和生活实验室来探索非用户行为的方法,可作为改进和提升数字图书馆服务系统的设计工具。     

Who benefits from which reading intervention in the primary years? Match the intervention with the reading profile

Abstract

Reading difficulties may have multiple causes. Effective approaches to reading intervention need to target the specific causes for individual readers. The Early Reading Intervention Knowledge program comprises three intervention pathways: a phonological-phonemic pathway, a phonic-orthographic pathway, and an oral language pathway. This study examines the effectiveness of each pathway for 902 underachieving students in their second to fifth years of primary education. The students differed in their reading profiles. The interventions were implemented in a regular school context. Intervention in the three pathways improved reading accuracy and comprehension for both the younger (Years 2 and 3) and older (Years 4 and 5) age groups. The pattern in accuracy gains across the three pathways was similar for each group, with the older students making smaller gains. Reading profiles influenced the rate or amount of gain. For comprehension, the phonological and oral language pathways yielded higher gains for both age groups than the orthographic pathway. The most at-risk students showed the highest gains. The implications for intervention are discussed.