一种基于快速傅立叶变换的平衡能力分析方法

对平衡能力进行有效地评估,便于采取合适的辅助治疗措施防止跌倒的发生。该文通过对人体八种站立姿势下的脚底压力数据进行采集,获取重心的轨迹变化,利用快速傅里叶变换方法对轨迹变化进行处理获得幅度-频率变化结果,掌握人体站立姿势下的动摇程度,从而为人体的平衡功能测定提供客观的技术指标。     

右侧卧睡姿最好的理由

一般情况下，人的睡眠姿势大体可以分为仰卧、俯卧、侧卧三种。其中，右侧卧的姿势是比较科学的。有关专家说，当一个人仰卧时，背部肌肉不能得到很好的放松。这是因为仰卧时身体的重量都压在背部，使得背部肌肉过度受压，因此人们往往在睡了一个夜晚起床之后，还会背部疼痛。而且，仰卧时，由于舌头是软体的，在口腔中往往会向咽部低垂，这样很容易引起呼噜，     

关于跑步的10点分享

有朋友问到我的跑步经验,在此与大家分享几点可能对健康有益的经验. 1.姿势.跑步首先姿势要对.要看对不对,可以在跑步时让人从前后左右不同方向拍个视频,看看自己的重心稳不稳,有没有晃动;身体是否正直不偏向一边;是否过分前倾或后倾;有没有撅肚子、勾着腰;等等.     

基于OpenVINO的情绪识别反馈康复训练系统设计

目的:设计基于开放视觉推理和神经网络优化(OpenVINO)人工智能工具套件的情绪识别反馈康复训练系统,方便康复人员在可调难度的游戏场景中进行康复训练,并可根据其情绪进行难度调整.方法:建立基于OpenVINO人工智能工具套件及Pygame程序模块的康复训练系统架构,利用Python的OpenVINO引擎进行情绪识别系...     

二十四式太极拳(二)

第三式:白鹤亮翅①上体微向左转,左手翻掌向下,左臂平屈胸前,右手向左上划弧,手心转向上,与左手成抱球状。眼睛注视左手。②右脚跟进半步,上体后坐,身体重心移至右腿。上体先向右转,面向右前方,眼睛注视右手;然后左脚稍向前移,脚尖点地,成左虚步,同时上体再微向左转,面向前方,随转体右手向右上、左手向左下慢慢分开,右手上提停于右额前,手心向左后方,左手落于左胯前,手心向下,指尖向前,眼平视前方。要点:完成姿势胸部不要挺出,两臂都要保持半圆形,左膝要微屈。身体重心后移和右手上提、左手下按要协调一致。第四式:左右搂膝拗步①右手从体前…     

四式动作打造“背后风景”

瘦背美背小技巧日常养护工程想要拥有一个人人称羡的背部.日常的清洁与照顾是绝对少不了的。每周一次的深度去角质以及促进血液循环的背部护理.都是可以自己动手DIY的。不妨先用身体磨砂产品彻底清除老硬角质后.再以含有迷迭香成分的身体乳液紧实背部肌肉.日常的保养就能轻松完成。常照镜子常常检视自己的姿势.时时提醒自己要抬头挺胸。扩胸健康操:双手伸到背后合掌,手指朝上,掌心相对。将此动作养成每日的习     

“开车疲劳”那样歇

健康坐姿是关键开车时,对于背部压力最大的是坐姿,健康坐姿是应随时注意脊柱保持和缓的S形曲线。在车内,司机们常常放松自己,把身体整个窝进椅子里,使得脊柱成了C形。这种不良姿势会过度拉扯下背部的韧带,且压迫到附近脊柱的神经,造成背痛。避免坐时弯腰驼背的最简单方法,是尽量把臀部往后移,让脊椎稳稳地落在髋关节上,下背打直,养成习惯     

二十四式 太极拳(九)

第十九式:海底针右脚向前跟进半步,身体重心移至右腿,左脚稍向前移,脚尖点地,成左虚步。身体稍向右转,右手下落经体前向后、向上提抽至肩上耳旁,再随身体左转,由右耳旁斜向前下方插出,掌心向左,指尖斜向下;同时,左手向前、向下划弧落于左胯旁,掌心向下,指尖向前。眼睛注视前下方。要点:身体要先向右转,再向左转。完成姿势,面向正西。上体不可太前倾。避免低头和臀部外凸。左腿要微屈。第二十式:闪通臂上体稍向右转,左脚向前迈出,屈膝弓腿成左弓步。同时右手由体前上提,屈臂上举,停于右额前上方,掌心翻转斜向上,拇指朝下;左手上起经胸前向前…     

蔬菜大棚内作业人员作业的姿势负荷分析

目的了解蔬菜大棚内不同类型作业和身体部位的姿势负荷情况。方法选取186名从事棚内作业6个月以上的人员,应用OWAS方法对不同类型作业活动进行姿势编码分析,探讨其不同作业和身体部位的姿势负荷。结果棚内不同类型作业及身体部位的姿势各不相同。异常姿势(4级)在不同作业中呈较大差异,以搬运作业最高,其次为配药、喷药,两者主要发生于下肢和背部,而棚内作业的高负荷主要为搬运。结论蔬菜棚内作业的姿势负荷与作业类型有关,虽大多数为1级姿势,但异常姿势(4级)在各作业中仍占一定比例,均需要立即加以纠正和克服。     

一种新型医用下肢康复支具的研制

本文阐述了一种新型医用下肢康复支具的研制过程。该装置主要由承重装置、负重装置、负重调节装置以及压力检测装置等结构组成,具有调节、设定以及控制负重载荷等功能,可使行内固定术后的下肢骨折患者早期进行负重、行走功能锻炼,促进其骨折愈合及肢体功能康复,减少术后并发症,具有一定的实用价值。     

Calcium intake in the elderly: validation of a dietary questionnaire

Epidemiological studies of calcium and osteoporosis have been hampered by the lack of a suitable tool for assessing calcium intake. This report describes a new frequency and amount questionnaire for measuring present and past calcium intake in the elderly. The validity of the questionnaire was tested against two commonly used standards of dietary assessment, five-day duplicate diets and seven-day weighed dietary inventories. The resulting correlation coefficients were, respectively, r = 0.76 and r = 0.69, while that for repeatability was r = 0.84. Furthermore, the questionnaire categorized subjects into thirds of the distribution of intake with almost no gross misclassification. It is suggested that the present findings may be extended to the majority of normal, healthy elderly subjects, implying wide application for the questionnaire in the assessment of calcium intake in the elderly.     

Self-reported health problems among Swedish miners one year after unemployment

Unemployment is considered to be a public health concern sincedeterioration in the health of the unemployed is often anticipated.However, for some groups, such as miners, unemployment mightimprove health due to a cessation of potentially harmful occupationalexposures. This study evaluates the health of 79 miners in oneSwedish iron-ore mine, and 226 age-matched controls from thegeneral population, during one year after the closure of themine. The participants received a questionnaire regarding medicalhistory and subjective symptoms at the beginning of the studyperiod, and after one year. Statistically significant negativeeffects on self-reported health attributable to unemploymentwere not found, although neuropsychiatric symptoms were morecommon among the unemployed miners. The miners reported a statisticallysignificant improvement in grip force (p=0.031). They had asignificantly higher prevalence of symptoms associated withmining related exposures when compared with the population controls;pain in the upper extremities [relative risk (RR)=2.27, 95%confidence interval (Cl)=1.44–3.59), back pain (RR=1.84;Cl=1.237–2.75), vasospastic disease of the fingers (RR=2.05;Cl=1.18–3.57) and obstructive respiratory symptoms (attacksof dyspnea and wheezing: RR=3.67; Cl=1.167–11.6).     

Excès de cas humains et animaux de tularémie en France au cours de l’hiver 2007–2008 : émergence ou phénomène isolé ?

Context

Tularemia is a zoonosis affecting humans and hares in France. We describe the results of surveillance in both species, in 2007 and 2008.

Methods

Human tularemia cases are mandatorily notifiable in France since 2003. In hares, surveillance relies on volunteer hunter associations in all districts of the country. Data from mandatory reports and volunteer surveillance in 2007/2008 were analyzed and compared with previous results.

Results

In 2007/2008, 144 cases were reported in humans and 117 cases in hares. This was a 100% increase compared to previous years. Human cases differed from those of previous years only by the frequency of contact with breeding animals. Human cases without any documented risk exposure were also more frequent.

Conclusion

An increase of tularemia cases occurred in 2007/2008 in both species. Complementary studies are needed to identify the species reservoir in France to understand the causes of this peak of cases.     

Occupational health hazards in mining: an overview

This review article outlines the physical, chemical, biological, ergonomic and psychosocial occupational health hazards of mining and associated metallurgical processes. Mining remains an important industrial sector in many parts of the world and although substantial progress has been made in the control of occupational health hazards, there remains room for further risk reduction. This applies particularly to traumatic injury hazards, ergonomic hazards and noise. Vigilance is also required to ensure exposures to coal dust and crystalline silica remain effectively controlled.     

Manufacture and use of nanomaterials: current status in the UK and global trends

This paper provides an overview of the production and use of nanomaterials (NMs), particularly in the UK. Currently, relatively few companies in the UK are identifiable as NM manufacturers, the main emphasis being the bulk markets in metals and metal oxides, and some niche markets such as carbon nanotubes and quantum dots. NM manufacturing in the UK does not reflect the global emphasis on fullerenes, nanotubes and fibres. Some assumptions have been made about the types of NM that are likely to be imported into the UK, which currently include fullerenes, modified fullerenes and other carbon-based NMs including nanotubes. Many university departments, spin-offs and private companies have developed processes for the manufacture of NMs but may only be producing small quantities for research and development (R&D) purposes. However, some have the potential to scale up to produce large quantities. The nanotechnology industry in the UK has strong R&D backup from universities and related institutions. This review has covered R&D trends at such institutions, and appropriate information has been added to a searchable database. While several companies are including NMs in their products, only a few (e.g. manufacturers of paints, coatings, cosmetics, catalysts, polymer composites) are using nanoparticles (NPs) in any significant quantities. However, this situation is likely to change rapidly. There is a need to collect more information about exposure to NPs in both manufacturing and user scenarios. As the market grows, and as manufacturers switch from the micro- to the nanoscale, the potential for exposure will increase. More research is required to quantify any risks to workers and consumers.     

深圳公立医院管理体制改革制度设计

深圳公立医院管理体制改革实行政事分开、管办分开,在理事会架构下按法定机构模式组建市医管中心,落实公立医院运营管理自主权.作者从当前公立医院管理体制的弊端入手,介绍了深圳市进行公立医院管理体制改革的基本思路及改革方案设计的主要举措,深入剖析了的改革方案的特点,并对改革效果进行了预测.     

Effects of nitrogen dioxide on red blood cells of rats: Changes in components of red cell membranes during in vivo exposure to NO2

Red cell membranes, prepared from red blood cells of rats exposed to 4, 10, or 20 ppm nitrogen dioxide (NO₂) for 1 to 10 days, were examined for evidence of changes in membrane components. Appreciable changes were not found in contents of phospholipid and cholesterol during exposure to 10 ppm NO₂. By contrast, protein content altered with the time of exposure. Moreover, changes in protein composition were observed by employing sodium dodecyl sulfate — polyacrylamide gel electrophoresis. Twenty-four-hour exposure to NO₂ at the concentration above 10 ppm resulted in a marked increase in the percentage of lysophosphatidylethanolamine (LysoPE) to the total phospholipids. The prolonged exposure to 10 ppm NO₂ gave rise to a further increase in LysoPE, whereas the percentage of phosphatidylethanolamine (PE) showed a gradual decrease. A 1-day exposure to 4.0 ppm NO₂ also caused an increase in sialic acid content and decreases in those of PE and hexose. In addition to contents of these components the percentage of LysoPE increased 5 days after exposure and the elevated values were maintained up to the end of exposure period. These results demonstrate that red blood cells in circulation exhibit different membrane properties in terms of lipid and carbohydrate composition during 10 days of exposure to 4.0 ppm NO₂.     

Investigating clusters in the workplace and beyond

Clusters of disease are common and occur in the workplace and in the general community. They often arouse considerable concern among the population. Investigations have sometimes lead to exciting new knowledge, but in general the investigation of clusters is difficult and often unrewarding, especially for community clusters. In the workplace, investigations are more likely to find associations and even new causes, but still many clusters remain enigmatic. Despite this, there are many reasons for investigating clusters, including allaying community concern and identifying uncontrolled exposures. A structure for investigating clusters in the workplace is suggested.