Comparison of heart rate monitoring with indirect calorimetry for energy expenditure evaluation

PurposeThe purpose of this study was to compare established methods with newly-developed methods for estimating the total energy expenditure (TEE).MethodsThe study subjects comprised 46 individuals, including 16 middle-aged men (mean age 51.4 years), 14 middle-aged women (mean age 49.9 years) and 16 young women (mean age 19.1 years). The TEE was estimated from 24-h heart rate (HR) data using newly-developed software (MoveSense HRAnalyzer 2011a, RC1, Suunto Oy, Vantaa, Finland), and was compared against the TEE determined using doubly labeled water (DLW). Agreement between the two methods was analyzed using Bland and Altman plots.ResultsThe HR method yielded similar TEE values as the DLW method at the group level, with an average of 8.6 kcal/day in the difference in the mean, but with large individual variations. Forty-four (96%) out of 46 subjects fell within ±2SD of the mean difference in TEE comparisons, and there was no tendency towards under- or over-estimation.ConclusionOur results indicate that the current software using HR analysis for the estimation of daily TEE needs further development for use with free-living individuals.     

我思故我在——浅析创作者思维在纪录片中的表达

纪录片是“用影片叙述非虚构的故事”,强调的是对客观事实的纪录。对客观事实的纪录是创作者思维的结果,只有用心思考的纪录片才能唤起观众的呼应和共鸣,创作者的思维是无形的手,决定着片子的深度和方向。纪录片创作者的主观意图的表达究竟在片子创作过程当中处于什么样的地位,创作者究竟应该持有一个什么样的思维尺度,才能在表达创作意图的同时无损于纪录片真实的生命,并且能同时得到观众的认可。     

Disillusionment of American Dream:Willy Loman’s Tragic Dream

Arthur Miller plays an important role in American literature. His works have a great influence on American literature afterWorld War Ⅱ.Willy Loman is the symbol of modern American man. His living state is typical during that time in America. This paperstarts with a survey of Willy’s two dreams-his children can own big future; he can own big business. In the second part, the author contrasts Willy’s unreal dreams with the reality, through this comparison, aims at analyzing the sad elements of Willy’s life, exploring thesource of his sadness. Willy is one convict of American dream. He is influenced greatly by the American cultural mainstream. As an individual drowning in the harsh world, he cannot grasp his own fate by himself.     

城乡二元结构下的社会分层因素和教育公平

城乡教育差距已成为当今中国最突出的问题之一.通过对我国社会分层的现状及教育的社会流动功能的阐述,从社会分层对教育公平的影响、城乡二元结构对农村学生通过教育实现社会流动的影响、城乡二元结构下教育社会流动功能的弱化三个方面探讨城乡二元结构下的社会分层因素和教育公平的相互影响,揭示其内在联系.     

一种改进的螺旋锥束FDK算法

针对螺旋锥束CT的图像重建算法,提出一种改进FDK算法,和标准的FDK算法相比,它把冗余权放在滤波后处理,减少了计算工作量.     

Simulation of top-down crack propagation in asphalt pavements

Top-down crack in asphalt pavements has been reported as a widespread mode of failure.A solid understanding of the mechanisms of crack growth is essential to predict pavement performance in the context of thickness design,as well as in the design and optimization of mixtures.Using the coupled element free Galerkin (EFG) and finite element (FE) method,top-down crack propagation in asphalt pavements is numerically simulated on the basis of fracture mechanics.A parametric study is conducted to isolate the effects of overlay thickness and stiffness,base thickness and stiffness on top-down crack propagation in asphalt pavements.The results show that longitudinal wheel loads are disadvantageous to top-down crack because it increases the compound stress intensity factor (SIF) at the tip of top-down crack and shortens the crack path,and thus the fatigue life descends.The SIF experiences a process "sharply ascending—slowly descending—slowly ascending—sharply ascending again" with the crack propagating.The thicker the overlay or the base,the lower the SIF; the greater the overlay stiffness,the higher the SIF.The crack path is hardly affected by stiffness of the overlay and base.     

农民工劳动合同中存在的问题及原因分析

劳动合同是劳动者与用人单位确立劳动关系、明确双方权利和义务的协议。劳动合同对保护劳动者的合法权益非常重要,农民工由于各种原因在劳动关系中处于明显的弱势地位,尤其需要运用劳动合同来保护自身的合法权益。     

利用Blackboard网络教学平台提升信息检索公选课品质

Blackboard教学管理平台集课程组织、资源建设、评价及交流等功能于一体,已经广泛应用于国内外各类教育机构的教学活动中。实践证明,充分利用Bb这个成熟完善的教学平台,在完善教学体系、加强交流互动、进行教学评估以及开展远程教学等方面,对提升信息检索课的品质都非常有帮助。     

黄酒文化韵醉天下

绍兴酒的世博情缘 在韩国丽水市举办的2012年世博会上,一款来自中国的古越龙山绍兴（花雕）酒吸引无数游客驻足。     

信息资源共享系统绩效评估实施研究

在调查国内外信息资源共享系统绩效评估的实施现状的基础上,论述信息资源共享系统绩效评估实施应遵循的科学性、客观性和可操作性原则,分析实施绩效评估的各项要素,从政策、技术、组织、人员等方面探讨信息资源共享系统绩效评估实施的条件。参考文献15。