How much exercise are older adults living in nursing homes doing in daily life? A cross-sectional study     

Philipe De Souto Barreto  Laurent Demougeot  Bruno Vellas  Yves Rolland 《Journal of sports sciences》2015,33(2):116-124

Information on the amount of exercise practised by nursing home (NH) residents is scarce. This study aimed at describing NH residents’ participation in exercise classes, as well as to examine whether the presence of a professional exercise instructor in the facilities is associated with residents’ exercise habits. The cross-sectional data of 5402 residents (median age = 88 years; mostly women (75.2%)) from 163 NHs in France were analysed. Adjusted logistic and linear regressions were performed to examine whether the presence of a professional exercise instructor in the NH was associated with exercise habits: exercise participation, frequency, duration, and levels. From the 5402 participants, 1914 were participating in exercise classes provided in the NH. Most of them had an exercise frequency of 1x/week or less. Median duration of exercise sessions was 45 min. Exercise levels were rated as: highly active (n = 487), intermediately active (n = 1096), and poorly active (n = 331). The presence of a professional exercise instructor working in the facility was significantly associated with exercise participation and with higher exercise frequencies and levels, and session duration. In conclusion, the presence of professional exercise instructors is associated with better exercise habits in NH residents. Improved exercise habits may potentially be translated into better health in this population.  相似文献   

《高频电子线路》课程“振幅解调”教学策略     

李娜  唐永刚  宗素兰  常红霞 《巢湖学院学报》2015,(3):160-164

介绍两种常用的调幅信号解调方法,即同步检波法、包络检波法。采用对比教学法帮学生建立振幅解调的完整知识体系。引导学生设计简易二极管包络检波电路并观察解调失真。初步探索在高频电子线路课程中理论、实践相结合的新思路、新途径。  相似文献   

2005-2014年图书情报学4刊发文著者的统计分析     

黄勤 《金陵科技学院学报(社会科学版)》2015,(2)

通过对2005—2014年图书情报学4刊论文著者的统计,对合著率、著者发文规律、高产著者年龄、地区及单位分布进行分析,并归纳国内图书情报学的发展规律。  相似文献   

通过多种形式组织专题提升科技期刊质量          下载免费PDF全文

石鹤  汪晓  杨岷  艾文霞  明桥 《中国科技期刊研究》2015,26(12):1273-1277

[目的]探索医学期刊组织专题的有效途径,为国内医学期刊提供借鉴与参考。[方法]以《放射学实践》杂志为例,介绍其通过与协办单位合作、及时报道重大科研成果、围绕突发公共卫生事件等多种方式进行专题组稿的经验和体会;比较、分析专题论文和非专题论文的质量。[结果]《放射学实践》近3年成功组织了22个专题,极大地扩大了本刊在业内的影响。专题论文的篇均被引频次和篇均下载量均明显高于非专题论文。[结论]医学期刊编辑应该结合自身杂志特点,充分发挥积极性和主动性,勇于探索,敢于创新,不断开拓专题组稿的新方法和新形式,为提高期刊质量不懈努力。  相似文献   

地学核心期刊新媒体应用情况分析   总被引：2，自引：1，他引：1       下载免费PDF全文

陶华  朱强  宋敏红  孙良英  郝美玲 《中国科技期刊研究》2015,26(4):414-417

【目的】通过分析中国地学核心期刊应用新媒体现状,为推动地学核心期刊新媒体化提供理论支持。【方法】统计对比分析《中国科技期刊引证报告》2012-2013年度地学核心期刊核心影响因子及核心被引频次及相关地学核心期刊网站新媒体应用数据。【结果】应用新媒体的地学核心期刊主要评价指标(核心被引频次和核心影响因子)总体都有较为显著的提升。【结论】新媒体的应用能够有效提升地学核心期刊的影响力和综合竞争力,地学期刊新媒体化将成为今后地学期刊发展的主流趋势。  相似文献   

激光雷达距离欺骗干扰技术研究     

王萃  张会彬 《大众科技》2015,(1)

文章主要介绍激光雷达测距的原理,激光测距机的组成及各部分的功能,根据其原理,介绍一种常用的距离欺骗的方法-数字储频技术,阐述其距离假目标欺骗的原理,对其工作过程进行仿真。研究表明,采用数字储频技术能够有效的进行欺骗,这种技术既可以用于掩护空防,又可以用于干扰敌方并诱敌开机,暴露其真实的兵力部署,因此具有相当大的军事意义。  相似文献   

时间之环——《解忧杂货店》的时间变形     

李天 《佳木斯教育学院学报》2015,(6)

《解忧杂货店》是日本当代推理小说家东野圭吾的一部非推理小说。在该作品中,作者非但没有制造凶杀案与寻找真相的紧张感,反而给读者带来满满的感动以及拼搏向上的正能量。东野圭吾的这部作品除了选材精妙之外,他通过灵活变换叙述时间是小说的叙事时间形成了一个封闭的圆环,从而使五个故事环环相扣,结构十分独特。笔者试图以时距为线索来分析这部作品的魅力。  相似文献   

新媒体语境特征与用户态度关系构建的实证研究     

薛可  阳长征  余明阳 《湖南师范大学社会科学学报》2015,(3):153-160

通过对上海市民进行抽样调查,并使用结构方法模型对新媒体语境下的受众社会态度倾向进行实证研究,得出如下结论：新媒体语境通过社会懈怠对用户风险偏好和群体极化倾向产生正向影响,对责任与公平意识、道德发展以及亲社会倾向产生负向影响;媒体接触频率在新媒体与社会懈怠关系中具有显著正向调节作用,而媒体接触的多样性在其中的调节作用并不明显;在主效应和调节作用中,均表现出对男性的影响大于对女性的影响,其影响大小随着年龄的增加而呈减弱趋势。  相似文献   

Transmission of vibration from a vibrating plate to the head of standing people     

Naser Nawayseh 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(5):482-500

Little is known about the transmission of vibration to the head when using whole-body vibration (WBV) training machines. This paper investigates the effect of frequency and posture on the transmission of vibration from a vibrating plate to the head of standing people. Nine male participants were exposed to vertical vibration at nine frequencies in the range of 17–46 Hz and vibration acceleration in the range of 7.85–18.64 m/s² (peak). The participants adopted four standing postures described as standing with locked knee (LK), bent knee (BK), one leg (OL), and one foot to the front and the other to the back (FB). The transmissibility to the head differed among postures (t-test, p < 0.05) and was greatest with the FB posture and smallest with the BK posture. The transmissibility to the head decreased with increasing the frequency (t-test, p < 0.05) but the extent of the decrease depended on the adopted posture. This frequency-posture interaction effect on the transmissibility should be considered when designing a training program. The data will be useful for developing standards/protocols that govern the use of WBV machines as well as for building human body models that can predict potential risks arising from using WBV machines.  相似文献   

Optimal sampling frequency in recording of resistance training exercises     

Paolo Bardella  Irene Carrasquilla García  Marco Pozzo  Julio Tous-Fajardo  Eduardo Saez de Villareal 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(1):102-114

The purpose of this study was to analyse the raw lifting speed collected during four different resistance training exercises to assess the optimal sampling frequency. Eight physically active participants performed sets of Squat Jumps, Countermovement Jumps, Squats and Bench Presses at a maximal lifting speed. A linear encoder was used to measure the instantaneous speed at a 200 Hz sampling rate. Subsequently, the power spectrum of the signal was computed by evaluating its Discrete Fourier Transform. The sampling frequency needed to reconstruct the signals with an error of less than 0.1% was f_99.9 = 11.615 ± 2.680 Hz for the exercise exhibiting the largest bandwidth, with the absolute highest individual value being 17.467 Hz. There was no difference between sets in any of the exercises. Using the closest integer sampling frequency value (25 Hz) yielded a reconstruction of the signal up to 99.975 ± 0.025% of its total in the worst case. In conclusion, a sampling rate of 25 Hz or above is more than adequate to record raw speed data and compute power during resistance training exercises, even under the most extreme circumstances during explosive exercises. Higher sampling frequencies provide no increase in the recording precision and may instead have adverse effects on the overall data quality.  相似文献