宇航员睡眠需求的临界数据
文章来源:未知 文章作者:enread 发布时间:2013-01-09 07:14 字体: [ ]  进入论坛
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In the first study of its kind, a team of researchers led by faculty1 at the Perelman School of Medicine at the University of Pennsylvania and the Baylor College of Medicine, has analyzed2 data on the impact of prolonged operational confinement3(限制,监禁) on sleep, performance, and mood in astronauts from a groundbreaking international effort to simulate a 520-day space mission to Mars. The findings, published online-first in the Proceedings4 of the National Academy of Sciences, revealed alterations5 of life-sustaining sleep patterns and neurobehavioral consequences for crew members that must be addressed for successful adaption to prolonged space missions.
 
"The success of human interplanetary spaceflight, which is anticipated to be in this century, will depend on the ability of astronauts to remain confined and isolated6 from Earth much longer than previous missions or simulations," said David F. Dinges, PhD, professor and chief, Division of Sleep and Chronobiology in the Department of Psychiatry7 at the Perelman School of Medicine, and co-lead author of the new study. "This is the first investigation8 to pinpoint9 the crucial role that sleep-wake cycles will play in extended space missions."
 
The 520-day simulation, which was developed by the Institute for Biomedical Problems (IBMP) of the Russian Academy of Sciences, and sponsored in part by the European Space Agency (ESA), was initiated10 on June 3, 2010 when the hatches were closed on a 550-cubic-meter IBMP spacecraft-like confinement facility in Russia. The simulated mission, involving an international, six-man team of volunteers, involved more than 90 experiments and realistic scenarios11 to gather valuable psychological and medical data on the effects of a long-term deep space flight. The 520-day mission was broken into three phases: 250 days for the trip to Mars, 30 days on the surface, and 240 days for the return to Earth.
 
As the only U.S. research team involved with the Mars 520-day simulation, the study authors monitored the crew's rest-activity patterns, and performance and psychological responses to determine the extent to which sleep loss, fatigue12, stress, mood changes and conflicts occurred during the mission.
 
Measurements included continuous recordings13 of body movements using wrist actigraphy (a noninvasive means of estimating sleep and movement intensity), and light exposure and weekly computer-based neurobehavioral assessments14 to identify changes in the crew's activity levels, sleep quantity and quality, sleep-wake intervals15, alertness performance, and workload16 throughout the 17 months of mission confinement.
 
Data from the actigraph(活动变化记录仪) devices revealed that crew sedentariness(久坐,定居) increased across the mission, as illustrated17 by decreased waking movement and increased sleep and rest times. The majority of crewmembers also experienced one or more disturbances18 of sleep quality, alertness deficits19, or altered sleep-wake intervals and timing20, suggesting inadequate21 circadian(生理节奏的) synchronization22.
 
"Taken together, these measurements point to the need to identify markers of differential vulnerability to abnormal decrease in muscular movement and sleep- wake changes in crew members during the prolonged isolation23 of exploration spaceflight and the need to ensure maintenance of the Earth's natural circadian rhythm, sleep quantity and quality, and optimal24 activity levels during exploration missions," said Mathias Basner, MD, PhD, MSc, assistant professor of Sleep and Chronobiology in Psychiatry at Penn and co-lead author.
 
The research team concludes that successful adaptation to such missions will require crews to transit25 in spacecraft and live in surface habitats that artificially mimic26 aspects of Earth's sleep-wake activity cycles, such as appropriately timed light exposure, food intake27, and exercise. This dynamic will be necessary to maintain neurocognition and human behavior throughout the flight.


点击收听单词发音收听单词发音  

1 faculty HhkzK     
n.才能;学院,系;(学院或系的)全体教学人员
参考例句:
  • He has a great faculty for learning foreign languages.他有学习外语的天赋。
  • He has the faculty of saying the right thing at the right time.他有在恰当的时候说恰当的话的才智。
2 analyzed 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 );分解;解释;对…进行心理分析
参考例句:
  • The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程,因为对他来说,爱是个不可分析的迷。 来自《简明英汉词典》
3 confinement qpOze     
n.幽禁,拘留,监禁;分娩;限制,局限
参考例句:
  • He spent eleven years in solitary confinement.他度过了11年的单独监禁。
  • The date for my wife's confinement was approaching closer and closer.妻子分娩的日子越来越近了。
4 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
5 alterations c8302d4e0b3c212bc802c7294057f1cb     
n.改动( alteration的名词复数 );更改;变化;改变
参考例句:
  • Any alterations should be written in neatly to the left side. 改动部分应书写清晰,插在正文的左侧。 来自《简明英汉词典》
  • Gene mutations are alterations in the DNA code. 基因突变是指DNA 密码的改变。 来自《简明英汉词典》
6 isolated bqmzTd     
adj.与世隔绝的
参考例句:
  • His bad behaviour was just an isolated incident. 他的不良行为只是个别事件。
  • Patients with the disease should be isolated. 这种病的患者应予以隔离。
7 psychiatry g0Jze     
n.精神病学,精神病疗法
参考例句:
  • The study appeared in the Amercian science Journal of Psychiatry.这个研究发表在美国精神病学的杂志上。
  • A physician is someone who specializes in psychiatry.精神病专家是专门从事精神病治疗的人。
8 investigation MRKzq     
n.调查,调查研究
参考例句:
  • In an investigation,a new fact became known, which told against him.在调查中新发现了一件对他不利的事实。
  • He drew the conclusion by building on his own investigation.他根据自己的调查研究作出结论。
9 pinpoint xNExL     
vt.准确地确定;用针标出…的精确位置
参考例句:
  • It is difficult to pinpoint when water problems of the modern age began.很难准确地指出,现代用水的问题是什么时候出现的。
  • I could pinpoint his precise location on a map.我能在地图上指明他的准确位置。
10 initiated 9cd5622f36ab9090359c3cf3ca4ddda3     
n. 创始人 adj. 新加入的 vt. 开始,创始,启蒙,介绍加入
参考例句:
  • He has not yet been thoroughly initiated into the mysteries of computers. 他对计算机的奥秘尚未入门。
  • The artist initiated the girl into the art world in France. 这个艺术家介绍这个女孩加入巴黎艺术界。
11 scenarios f7c7eeee199dc0ef47fe322cc223be88     
n.[意]情节;剧本;事态;脚本
参考例句:
  • Further, graphite cores may be safer than non-graphite cores under some accident scenarios. 再者,根据一些事故解说,石墨堆芯可比非石墨堆芯更安全一些。 来自英汉非文学 - 环境法 - 环境法
  • Again, scenarios should make it clear which modes are acceptable to users in various contexts. 同样,我们可以运用场景剧本来搞清楚在不同情境下哪些模式可被用户接受。 来自About Face 3交互设计精髓
12 fatigue PhVzV     
n.疲劳,劳累
参考例句:
  • The old lady can't bear the fatigue of a long journey.这位老妇人不能忍受长途旅行的疲劳。
  • I have got over my weakness and fatigue.我已从虚弱和疲劳中恢复过来了。
13 recordings 22f9946cd05973582e73e4e3c0239bb7     
n.记录( recording的名词复数 );录音;录像;唱片
参考例句:
  • a boxed set of original recordings 一套盒装原声录音带
  • old jazz recordings reissued on CD 以激光唱片重新发行的老爵士乐
14 assessments 7d0657785d6e5832f8576c61c78262ef     
n.评估( assessment的名词复数 );评价;(应偿付金额的)估定;(为征税对财产所作的)估价
参考例句:
  • He was shrewd in his personal assessments. 他总能对人作出精明的评价。 来自《简明英汉词典》
  • Surveys show about two-thirds use such assessments, while half employ personality tests. 调查表明,约有三分之二的公司采用了这种测评;而一半的公司则采用工作人员个人品质测试。 来自百科语句
15 intervals f46c9d8b430e8c86dea610ec56b7cbef     
n.[军事]间隔( interval的名词复数 );间隔时间;[数学]区间;(戏剧、电影或音乐会的)幕间休息
参考例句:
  • The forecast said there would be sunny intervals and showers. 预报间晴,有阵雨。
  • Meetings take place at fortnightly intervals. 每两周开一次会。
16 workload fVCzw     
n.作业量,工作量
参考例句:
  • An assistant one day a week would ease my workload.每周有一天配一个助手就会减轻我的工作负担。
  • He's always grousing about the workload.他总是抱怨工作量大。
17 illustrated 2a891807ad5907f0499171bb879a36aa     
adj. 有插图的,列举的 动词illustrate的过去式和过去分词
参考例句:
  • His lecture was illustrated with slides taken during the expedition. 他在讲演中使用了探险时拍摄到的幻灯片。
  • The manufacturing Methods: Will be illustrated in the next chapter. 制作方法将在下一章说明。
18 disturbances a0726bd74d4516cd6fbe05e362bc74af     
n.骚乱( disturbance的名词复数 );打扰;困扰;障碍
参考例句:
  • The government has set up a commission of inquiry into the disturbances at the prison. 政府成立了一个委员会来调查监狱骚乱事件。
  • Extra police were called in to quell the disturbances. 已调集了增援警力来平定骚乱。
19 deficits 08e04c986818dbc337627eabec5b794e     
n.不足额( deficit的名词复数 );赤字;亏空;亏损
参考例句:
  • The Ministry of Finance consistently overestimated its budget deficits. 财政部一贯高估预算赤字。 来自《简明英汉词典》
  • Many of the world's farmers are also incurring economic deficits. 世界上许多农民还在遭受经济上的亏损。 来自辞典例句
20 timing rgUzGC     
n.时间安排,时间选择
参考例句:
  • The timing of the meeting is not convenient.会议的时间安排不合适。
  • The timing of our statement is very opportune.我们发表声明选择的时机很恰当。
21 inadequate 2kzyk     
adj.(for,to)不充足的,不适当的
参考例句:
  • The supply is inadequate to meet the demand.供不应求。
  • She was inadequate to the demands that were made on her.她还无力满足对她提出的各项要求。
22 synchronization DgDzwV     
n.同一时刻;同步;使时间互相一致;同时性
参考例句:
  • Communication record: the function supports synchronization record during the communication process. 通话录音:支持通话过程的同步录音。 来自互联网
  • Synchronization is an important problem of digital audio watermarking. 同步性是数字音频水印的一个重要问题。 来自互联网
23 isolation 7qMzTS     
n.隔离,孤立,分解,分离
参考例句:
  • The millionaire lived in complete isolation from the outside world.这位富翁过着与世隔绝的生活。
  • He retired and lived in relative isolation.他退休后,生活比较孤寂。
24 optimal zmDzhM     
adj.最适宜的;最理想的;最令人满意的
参考例句:
  • What is the optimal mix of private and public property rights in natural resources?私人和国家的自然资源产权的最适宜的组合是什么?
  • Optimal path planning is a key link for the sailing contest.帆船最优行驶路径规划是帆船比赛取胜的关键环节。
25 transit MglzVT     
n.经过,运输;vt.穿越,旋转;vi.越过
参考例句:
  • His luggage was lost in transit.他的行李在运送中丢失。
  • The canal can transit a total of 50 ships daily.这条运河每天能通过50条船。
26 mimic PD2xc     
v.模仿,戏弄;n.模仿他人言行的人
参考例句:
  • A parrot can mimic a person's voice.鹦鹉能学人的声音。
  • He used to mimic speech peculiarities of another.他过去总是模仿别人讲话的特点。
27 intake 44cyQ     
n.吸入,纳入;进气口,入口
参考例句:
  • Reduce your salt intake.减少盐的摄入量。
  • There was a horrified intake of breath from every child.所有的孩子都害怕地倒抽了一口凉气。
TAG标签: sleep space missions
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