Desert RATS 2011: Human and robotic exploration of near-Earth asteroids

The Desert Research and Technology Studies (D-RATS) 2011 field test involved the planning and execution of a series of exploration scenarios under operational conditions similar to those expected during a human exploration mission to a near-Earth asteroid (NEA). The focus was on understanding the operations tempo during simulated NEA exploration and the implications of communications latency and limited data bandwidth. Anchoring technologies and sampling techniques were not evaluated due to the immaturity of those technologies and the inability to meaningfully test them at D-RATS. Reduced gravity analogs and simulations are being used to fully evaluate Space Exploration Vehicle (SEV) and extravehicular (EVA) operations and interactions in near-weightlessness at a NEA as part of NASA's integrated analogs program. Hypotheses were tested by planning and performing a series of 1-day simulated exploration excursions comparing test conditions all of which involved a single Deep Space Habitat (DSH) and either 0, 1, or 2 SEVs; 3 or 4 crewmembers; 1 of 2 different communications bandwidths; and a 50-second each-way communications latency between the field site and Houston. Excursions were executed at the Black Point Lava Flow test site with a remote Mission Control Center and Science Support Room at Johnson Space Center (JSC) being operated with 50-second each-way communication latency to the field. Crews were composed of astronauts and professional field geologists. Teams of Mission Operations and Science experts also supported the mission simulations each day. Data were collected separately from the Crew, Mission Operations, and Science teams to assess the test conditions from multiple perspectives. For the operations tested, data indicates practically significant benefits may be realized by including at least one SEV and by including 4 versus 3 crewmembers in the NEA exploration architecture as measured by increased scientific data quality, EVA exploration time, capability assessment ratings, and consensus acceptability ratings provided by Crew, Mission Operations, and Science teams. A combination of text and voice was used to effectively communicate over the communications latency, and increased communication bandwidth yielded a small but practically significant improvement in overall acceptability as rated by the Science team, although the impact of bandwidth on scientific strategic planning and public outreach was not assessed. No effect of increased bandwidth was observed with respect to Crew or Mission Operations team ratings of overall acceptability.     

基于模糊模式识别的多通道目标选择算法

给出一种多通道用户界面的三维表示模型，证明目标选择是多通道人机交互技术的核心。针对多通道用户界面中输入信息的不精确性，运用模糊模式识别理论，提出根据不精确输入信息进行的目标选择算法。     

从一起航空运输严重事故征候看航空领域的威胁与差错管理

不安全事件的发生通常经历了威胁-人的差错-意外状态-不安全事件这样一个发展演变的过程。2010年1月13日,上航B5260号机在虹桥机场进近过程中下降低于安全高度,触发近地告警,构成一起航空运输严重事故征候。威胁与差错管理模型揭示:临时变更进近方式构成了来自外部环境的威胁,而航空器驾驶员和管制员在对威胁、人的差错和意外状态管理方面存在的失误是造成这起严重事故征候的主要原因。通过加强对威胁的识别和对人的差错和意外状态的管理,可以提高系统的容错、防错和纠错能力,有效防止不安全事件的发生。     

Effects of geomagnetic activity and atmospheric power variations on quantitative measures of brain activity: Replication of the Azerbaijani studies

This study replicates and extends the observations by Babayev and Allahveriyeva that changes in right hemispheric electroencephalographic activity are correlated with increases in geomagnetic activity. During the geomagnetically quiet interface between solar cycle 23 and 24 quantitative electroencephalographic (QEEG) measurements were completed for normal young adults in three separate experiments involving about 120 samples over 1.5 years. The most consistent, moderate strength correlations occurred for the changes in power within the gamma and theta ranges over the right frontal lobe. Real-time measures of atmospheric power obtained from polar orbiting satellites showed similar effects. The preferential involvement of the right frontal lobe and the regions subject to its inhibition with environmental energetic changes are consistent with the behavioural correlations historically associated with these conditions. They include increased incidence of emotional lability, erroneous reconstruction of experiences, social confrontations, and unusual perceptions.     

Effects of geomagnetic activity variations on the physiological and psychological state of functionally healthy humans: Some results of Azerbaijani studies

There are collaborative and cross-disciplinary space weather studies in the Azerbaijan National Academy of Sciences conducted with purposes of revealing possible effects of solar, geomagnetic and cosmic ray variability on certain technological, biological and ecological systems. This paper describes some results of the experimental studies of influence of the periodical and aperiodical changes of geomagnetic activity upon human brain, human health and psycho-emotional state. It also covers the conclusions of studies on influence of violent solar events and severe geomagnetic storms of the solar cycle 23 on the mentioned systems in middle-latitude location. It is experimentally established that weak and moderate geomagnetic storms do not cause significant changes in the brain’s bioelectrical activity and exert only stimulating influence while severe disturbances of geomagnetic conditions cause negative influence, seriously disintegrate brain’s functionality, activate braking processes and amplify the negative emotional background of an individual. It is concluded that geomagnetic disturbances affect mainly emotional and vegetative spheres of human beings while characteristics reflecting personality properties do not undergo significant changes.     

电镀含铬废水处理工艺研究

本文通过对含铬废水高效处理剂的研究，使电镀含铬废水处理工艺与电 镀生产工艺融为一体，实现电镀含铬废水槽边循环，改变了传统的电镀含铬废水先污染后的治理的末端治理工艺，无环保投资，有明显的经济效益与环境效益。     

企业人力资源管理问题探究

通过分析企业现行的人力资源管理体制、方法、制度等方面存在的一些具体问题，这些问题制约了现代企业的改革和发展，因此，改革人力资源管理体制，赋予人力资源管理以新的内容、方法和制度已是当务之急。在阐述了企业对人力资源管理与开发的具体措施后，指出企业的竞争力在很大程度上取决于人力资源的管理与开发。     

用AT89C2051实现的游泳池水保温控制系统

本文介绍一种以单片机为核心的游泳池水保温控制电路，用少量的器件实现8台电热水器顺序延时开关、自动检测显示水温等功能，提高了系统控温的安全、可靠和经济性。     

模拟微重力对人骨髓间充质干胞向成骨细胞分化中细胞信号通路影响的分析

通过模拟来研究微重力对hMSC向成骨细胞分化的影响,并利用相关信号通路的激活剂或抑制剂来调节这一分化过程．研究结果表明,在成骨细胞分化诱导条件下,微重力降低了hMSC向成骨细胞定向分化的能力,并且成骨细胞标记性基因的表达明显降低,Runt相关转录因子2（Runx2）的表达受到抑制．相反,过氧化物酶体增殖激活受体γ（PPARγ2）的表达则增加．同时,微重力也降低了ERK的磷酸化水平,而增加了p38MAPK的磷酸化水平．使用p38MAPK的抑制剂SB203580能够抑制p38MAPK的磷酸化,但不能降低PPARγ2的表达水平．骨形态发生蛋白（BMP）能增加Runx2的表达水平．成纤维细胞生长因子2（FGF2）增加了ERK的磷酸化水平,但也不能显著增加成骨细胞标记性基因的表达水平．采用BMP,FGF2和SB203580三种因子组合来调控微重力下的成骨细胞分化能力,结果表明三者的协同作用能显著逆转微重力对成骨细胞定向分化的生物学效应．研究结果还说明,模拟微重力应该是通过不同的细胞信号通路来抑制成骨细胞分化和提升脂肪细胞分化的．     

Electrostatic space radiation shielding

For the success of NASA’s new vision for space exploration to Moon, Mars and beyond, exposures from the hazards of severe space radiation in deep space long duration missions is ‘a must solve’ problem. The payload penalty demands a very stringent requirement on the design of the spacecrafts for human deep space missions. The exploration beyond low Earth orbit (LEO) to enable routine access of space will require protection from the hazards of the accumulated exposures of space radiation, Galactic Cosmic Rays (GCR) and Solar Particle Events (SPE), and minimizing the production of secondary radiation is a great advantage. There is a need to look to new horizons for newer technologies. The present investigation revisits electrostatic active radiation shielding and explores the feasibility of using the electrostatic shielding in concert with the state-of-the-art materials shielding and protection technologies. The full space radiation environment has been used, for the first time, to explore the feasibility of electrostatic shielding. The goal is to repel enough positive charge ions so that they miss the spacecraft without attracting thermal electrons. Conclusions are drawn for the future directions of space radiation protection.