A Study of the Transferable Elements in Interviews with Parents

The authors used correlational and confirmatory factor analytic techniques to examine the relationship between measures of the constructs of mathematics anxiety and test anxiety. The correlations found between measures of the 2 constructs were nearly as high as those found within measures of the 2 constructs, bringing into question the separateness of the constructs. Results of the confirmatory factor analysis provided some support for a distinction between the constructs; the correlation between the 2 factors, however, was relatively high. Those findings suggest that mathematics anxiety and test anxiety may be separate phenomena; the conceptual uniqueness of mathematics anxiety, however, needs to be further delineated and its measurement improved.     

Optimization of oar blade design for improved performance in rowing

Abstract

The aim of the present study was to find a more optimal blade design for rowing performance than the Big Blade, which has been shown to be less than optimal for propulsion. As well as the Big Blade, a flat Big Blade, a flat rectangular blade, and a rectangular blade with the same curvature and projected area as the Big Blade were tested in a water flume to determine their fluid dynamic characteristics at the full range of angles at which the oar blade might present itself to the water. Similarities were observed between the flat Big Blade and rectangular blades. However, the curved rectangular blade generated significantly more lift in the angle range 0 – 90° than the curved Big Blade, although it was similar between 90 and 180°. This difference was attributed to the shape of the upper and lower edges of the blade and their influence on the fluid flow around the blade. Although the influence of oar blade design on boat speed was not investigated here, the significant increases in fluid force coefficients for the curved rectangular blade suggest that this new oar blade design could elicit a practically significant improvement in rowing performance.     

The reliability of accelerometry to measure weightlifting performance

The purposes of the study were to track weightlifters' barbell acceleration with a portable accelerometer over three training sessions to examine test–retest reliability and to compare peak barbell acceleration at different training intensities. Twelve nationally ranked weightlifters volunteered for this study. The portable accelerometer was attached to the right side of the barbell to measure barbell resultant acceleration during the snatch lift at a sampling frequency of 100 Hz. The data were collected over three training sessions at intensity levels of 80%, 85%, and 90% of one repetition maximum. The data were analyzed using intra-class correlation coefficients (ICCs) for the three training sessions and one-way repeated measure ANOVA to compare the difference in peak barbell acceleration at three intensities. Results showed that the device was highly reliable with an ICC of 0.88 and 95% confidence interval of 0.81–0.93. There were significant differences in peak barbell acceleration at various lifting intensities, indicating a decline of the acceleration as the mass of the barbell became heavier. The portable accelerometer seems useful in measuring barbell acceleration data, which can be analyzed in future studies to monitor a weightlifter's performance in a practical setting instead of testing at a laboratory.     

矿井直流提升机全数字自动控制系统设计及其实际应用

本文详细地、直观地介绍了直流提升机全数字自动控制系统的组成和设计思想，对从事系统设计、调试以及维护人员都有非常大的启迪和帮助。     

略论中国古代廉政思想及其实践

探讨中国古代廉政思想及实践的主要内容,分析其值得我们借鉴和深思的地方。     

第十届世界健美操锦标赛混双项目托举动作与动力性配合动作分析

运用文献资料法、观察法、数理统计法等研究方法,对第十届世界健美操锦标赛混合双人项目我国前八名运动员与世界强队运动员的托举动作与动力性配合动作进行量化对比分析.研究指出:我国混双项目的托举动作的艺术性与国外强队存在很大差距.我国混双的托举动作主要围绕腰部和肩部进行,头部以上动作少且动作的编排缺少新意;动力性配合动作次数较少且动作持续时间短,与世界优秀选手差距较大.研究认为:在当今竞技健美操高手林立的局势下,我国运动员力量素质和其他身体素质的提高是今后训练的关键所在.     

担忧和期待：关于“全面放开竞争性领域商品服务和价格”的政策述评

党的十八届五中全会指出,全面深化改革的一项重要任务,即完善社会主义市场经济体制建立市场决定价格机制。就社会主义市场经济而言,“全面放开竞争性领域商品服务和价格”是价格改革中的“关键性战役”,面对“全面放开”之后的担忧和期待,本文从“政府说了算”还是“市场说了算”,“收”“放”之“困”从何而来,“经济新常态”下的必然选择,未来政策走向及经济影响四个方面论述了市场经济条件下全面实现市场决定价格机制的作用和意义。     

EL型电力机车受电弓控制电路的改造

在EL型电力机车的受电弓控制电路中增加了安全升弓装置和安全落弓装置,使受电弓的控制功能得到进一步完善,从而杜绝了由于电弓控制不合理所造成的人身伤亡和设备事故。     

The suitability of Sanders’ model for calculation of the propulsive force generated by the hands during sculling motion

This study examined whether Sanders’ model is suitable for estimating accurately the propulsive force generated by the hands’ motion in swimming comparing the calculated force obtained using the model and the measured force during an actual propulsive action. The measured and calculated forces were obtained from 13 swimmers who, while tethered, performed a sculling motion in a prone position for the purpose of displacing the body by moving it forward. Kinematic analyses were conducted to obtain the calculated force, while the measured force was obtained via the use of a load cell. The calculated force was lower than the measured force and accounted for only a small part of the variation in the measured force. The forces could not be used interchangeably, and there were fixed and proportional differences between them. Consequently, this study indicates that Sanders’ model is not suitable for estimating accurately the propulsive force generated by the swimmer’s hands during sculling motion. However, research that integrates analyses from different approaches could result in improvements to the model that would render it applicable for estimating the propulsive forces during movements that are characterised by directional changes of the hands.     

大型港机结构应力峰值与小车位置关联规则的数据挖掘

通过选取结构的典型测点,建立相应的数据挖掘模型,对大型港机在运行中结构的应力峰值与小车相应位置之间的相互关系进行分析,应用可视化的技术手段,对两者之间的关联规则进行深入挖掘,并通过对支持度、可信度和作用度的计算,衡量挖掘得到的关联规则的有用性和确定性.