体力活动测量方法研究进展

体力活动水平与健康之间存在着剂量反应,如何准确测量体力活动水平是研究人员关心的问题。本文综述了体力活动研究的几种主要方法:行为观察法,双标水法,间接热量测量法,心率法,运动传感器法,问卷法。双标水法被认为是人体能量消耗测量的金标准,间接热量测量法也经常被用来校正其他测量方法,但这两种方法很难在大规模人群中应用。运动传感器和问卷法是在大规模人群中应用比较多的两种方法。     

The dynamic control ratio at the equilibrium point (DCRe): introducing relative and absolute reliability scores

Analytical methods to assess thigh muscle balance need to provide reliable data to allow meaningful interpretation. However, reproducibility of the dynamic control ratio at the equilibrium point has not been evaluated yet. Therefore, the aim of this study was to compare relative and absolute reliability indices of its angle and moment values with conventional and functional hamstring–quadriceps ratios. Furthermore, effects of familiarisation and angular velocity on reproducibility were analysed. A number of 33 male volunteers participated in 3 identical test sessions. Peak moments (PMs) were determined unilaterally during maximum concentric and eccentric knee flexion (prone) and extension (supine position) at 0.53, 1.57 and 2.62 rad · s^–1. A repeated measure, ANOVA, confirmed systematic bias. Intra-class correlation coefficients and standard errors of measurement indicated relative and absolute reliability. Correlation coefficients were averaged over respective factors and tested for significant differences. All balance scores showed comparable low-to-moderate relative (<0.8–0.9) and good absolute reliability (<10%). Relative reproducibility of dynamic control equilibrium parameters augmented with increasing angular velocity, but not with familiarisation. At 2.62 rad · s^–1, high (moment: 0.906) to moderate (angle: 0.833) relative reliability scores with accordingly high absolute indices (4.9% and 6.4%) became apparent. Thus, the dynamic control equilibrium is an equivalent method for the reliable assessment of thigh muscle balance.     

A short German Physical-Self-Concept Questionnaire for elementary school children (PSCQ-C): Factorial validity and measurement invariance across gender

Research on children’s physical self-concept (PSC) is increasingly recognised as an important field of psychology. However, there is a lack of instruments suitable for younger children at elementary school age. In the present study, a short German 21-item Physical Self-Concept-Questionnaire for children (PSCQ-C) was tested measuring seven specific facets of elementary school children’s PSC (strength, endurance, speed, flexibility, coordination, physical appearance, global sport competence). A number of 770 elementary school children aged 8–12 years completed the PSCQ-C. Results showed good psychometric properties and high reliabilities of the seven scales. Confirmatory factor analysis revealed that the presumed 7-factor model fitted the data best compared to a global 1- and 2-factor model. Also, full measurement invariance was strongly established. Correlations among the seven scales were mainly moderate. Gender differences were suggestive of developmental trends that are consistent with prior studies. These results provide support that the PSCQ-C is a confidential instrument with sound psychometric properties measuring seven specific facets of elementary school children’s PSC.     

The validity and reliability of a sample of 10 Wattbike cycle ergometers

ABSTRACT

The purpose of the study was to assess the validity and inter-bike reliability of 10 Wattbike cycle ergometers, and to assess the test–retest reliability of one Wattbike. Power outputs from 100 to 1000 W were applied using a motorised calibration rig (LODE) at cadences of 70, 90, 110 and 130 rev · min^?1, which created nineteen different intensities for comparison. Significant relationships (P < 0.01, r² = 0.99) were found between each of the Wattbikes and the LODE. Each Wattbike was found to be valid and reliable and had good inter-bike agreement. Within-bike mean differences ranged from 0.0 W to 8.1 W at 300 W and 3.3 W to 19.3 W at 600 W. When taking into account the manufacturers stated measurement error for the LODE (2%), the mean differences were less than 2%. Comparisons between Wattbikes at each of the nineteen intensities gave differences from 0.6 to 25.5 W at intensities of 152 W and 983 W, respectively. There was no significant difference (P > 0.05) between the measures of power recorded in the test–retest condition. The data suggest that the Wattbike is an accurate and reliable tool for training and performance assessments, with data between Wattbikes being able to be used interchangeably.     

单源三站外辐射源雷达目标探测性能

论述全向外辐射源雷达空中目标探测系统的主要问题及系统体制损失。针对单源单站（SISO）和单源三站（SITO）两种工作方式,在接收天线阵元数相同的情况下分析探测距离和定位精度。在单源三站条件下推导直角坐标系中的目标速度矢量表达式,并分析速度测量精度。研究结果表明,在一定条件下,单源三站组网方式的空间覆盖范围与单源单站相当,且具有平面定位精度较高,可获得目标速度矢量和技术实现难度小的特点。     

Validity and Reliability of Three Self-Report Instruments for Assessing Attainment of Physical Activity Guidelines in University Students

The purpose of this study was to compare the validity and reliability of three short physical activity self-report instruments to determine their potential for use with university student populations. The participants (N = 155; 44.5% male; 22.9 ± 5.13 years) wore an accelerometer for 9 consecutive days and completed a single-item measure, the a brief two item measure and the International Physical Activity Questionnaire—Short Form questionnaires on day 1 and 9. Correlations between self-reported and accelerometer derived moderate-to-vigorous physical activity levels were moderate for the International Physical Activity Questionnaire—Short Form, while poor for the single-item measure and the a brief two item measure. The agreement level was high with the International Physical Activity Questionnaire—Short Form (77.4%) and moderate for both the single-item measure (45.2 %) and a brief two item measure (44.5 %). The intraclass correlations between the two administrations were moderate to strong across all measures (0.52–0.70) in 133 participants. The International Physical Activity Questionnaire—Short Form is the most suitable of these three self-report instruments for use with this population due to higher correlations and levels of agreement with accelerometry.     

Somewhere in the Middle: The Measurement of Third Culture

This study explores the concept of “third culture,” which has not been tested by quantified measures since it was introduced. This study develops the 10-item measurement of third culture based on three dimensions—equality, commonality, and transcendence. Two hundred and fifteen international married individuals from 42 countries participated in a self-administered email survey. The findings indicated that the new scale is reliable and functions as a single dimension instead of as three subdimensions. Suggestions for future study as well as several implications on theory and methodology are discussed, drawing on the experience of this study.     

国内邮轮旅游体验质量测量及其提升研究——以广西北海——越南下龙湾海上邮轮旅游航线为例

打造高品质的独特旅游体验是发展邮轮旅游的关键之一。广西北海——越南下龙湾海上邮轮旅游航线是目前我国唯一一条正在运营的跨国海上旅游航线,在对南宁、桂林、北海3个一级客源市场和邮轮乘客进行问卷调查的基础上,文章对该航线游客体验质量进行了测量,并据此总结出国内邮轮旅游体验质量提升的一般性策略。     

高新企业对新招高科技人才测评管理的分析

高新企业如何对其新招高科技人才进行测评管理,这个问题是高新企业人力资源管理方面的一个重要问题。通过对高新企业和新招高科技人才自身特点的分析以及高新企业对新招高科技人才进行测评管理的因素和过程的分析,建立起高新企业对新招高科技人才测评管理的模型,为高新企业的人力资源管理提供一些有益的建议。     

企业技术联盟绩效评价体系的比较和发展趋势分析

对于企业技术联盟而言,其绩效的测度一直引起人们的关注,但是不论是在理论上还是实践中都存在着诸多的分歧和争论。大量研究活动表明,企业技术联盟的绩效评价存在一定的复杂性。本文比较和评述了现有的企业技术联盟绩效评价体系,指出了其存在的局限性;并阐述了其发展趋势,包括:投入和产出的无形化;评价指标的非财务化;评价过程的动态化;评价标准的多样化;定量与定性相结合。