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Relevant bibliographies by topics / Weightless environment

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Academic literature on the topic 'Weightless environment'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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Journal articles on the topic "Weightless environment"

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Money, Kenneth E., and B. S. K. Cheung. "Alterations of Proprioceptive Function in the Weightless Environment." Journal of Clinical Pharmacology 31, no. 10 (October 1991): 1007–9. http://dx.doi.org/10.1002/j.1552-4604.1991.tb03664.x.

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Ma, Chao, Yu Qing Liu, and Xiu Qing Zhu. "Research of Human Modeling and Motion Simulation Based on ADAMS." Advanced Materials Research 1016 (August 2014): 292–97. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.292.

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The human model in this paper is simplified as a rigid body of 15 segments and the Roberson-Wittenberg method is used to establish the equation of conservation of angular momentum to obtain the control methods of human self-rotation without external force in a weightless environment. And simulation of human dynamic is completed in ADMAS (Automatic Dynamic Analysis of mechanical Systems). The simulation results show that human can generate corresponding body rotation through own limbs rotation in the weightless, and body rotation velocity and angle increase with the moment of inertia and rotational velocity of active body that adds greater torque to joint. Through the analysis of the impact of the angular velocity and torque on the body rotation, a set of self-rotation control strategy for astronaut is proposed in weightless environment.

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Kiselev, M. L., M. A. Zaytsev, V. V. Nesmeyanov, and O. V. Kuzovov. "Overview of Existing Weightless Environment Facilities for Training Cosmonauts." MANNED SPACEFLIGHT, no. 1(34) (March 2, 2020): 120–31. http://dx.doi.org/10.34131/msf.20.1.120-131.

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Takafuji, M., and T. Suda. "Combustion test device of powdered coal under weightless environment." Fuel and Energy Abstracts 43, no. 4 (July 2002): 251. http://dx.doi.org/10.1016/s0140-6701(02)86208-7.

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Zhu, Hui, Hanqing Wang, Chuck Yu, and Zhiqiang Liu. "Effects of simulated weightlessness on thermal sweating of human body: An experimental study." Indoor and Built Environment 28, no. 1 (April 24, 2018): 88–99. http://dx.doi.org/10.1177/1420326x18770501.

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Thermal sweating is the thermoregulatory activity of the human body in hot and warm environments, which is critical to the human thermal comfort and health. The sweating of a human body in a real weightlessness environment has seldom been researched, and simulated weightlessness has usually been conducted under comfortable environments. In order to study the sweating of the human body under weightlessness, a 7-day −6° head down bed rest experiment was carried out on six male subjects lying on their backs to simulate the physiological changes that occur under a weightless environment. The skin microcurrents of the subjects were recorded to evaluate sweating under a range of environments. The results showed that sweating was more significant in the torso and head areas than on the arms and lower body. The whole body sweat rates of subjects were lower than those before the simulated weightlessness experiment. However, the threshold air temperature for the onset of sweating under simulated weightlessness was higher than that before the simulation. This was possibly due to the raising of thermoregulatory set-point temperature of the body. Findings have shown that the sweating behaviour and thermal response of a male human body in a weightless environment could be different to those in the terrestrial condition.

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Seo, Hisao, and Nobuo Matsui. "Hormonal Regulation of Water and Electrolyte Metabolism under Weightless Environment." Biological Sciences in Space 2, no. 2 (1988): 69–79. http://dx.doi.org/10.2187/bss.2.69.

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ITO, Tsuyoshi, Yoshihiko TAGAWA, and Naoto SHIBA. "Maintenance and strengthening of human body musculoskeletal system in weightless environment." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2004.16 (2004): 303–4. http://dx.doi.org/10.1299/jsmebio.2004.16.303.

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Gürel, Zeynep, and Hatice Acar. "Research into Students’ Views About Basic Physics Principles in a Weightless Environment." Astronomy Education Review 2, no. 1 (February 2003): 65–81. http://dx.doi.org/10.3847/aer2003004.

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Zhang, Li-Fan. "Region-specific vascular remodeling and its prevention by artificial gravity in weightless environment." European Journal of Applied Physiology 113, no. 12 (March 24, 2013): 2873–95. http://dx.doi.org/10.1007/s00421-013-2597-8.

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Weiss, Claudia. "Representing the Empire: The Meaning of Siberia for Russian Imperial Identity." Nationalities Papers 35, no. 3 (July 2007): 439–56. http://dx.doi.org/10.1080/00905990701368696.

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Would you like to travel to outer space? Explore like real astronauts the slow, gentle movements characteristic of a weightless environment? The Houston Space Center offers its visitors such a trip through the ISS, the International Space Station. It presents America's space programme by using a simulator to create a compelling environment, complete with 3,000 accurately placed stars that mimic what the real astronauts experience in the ISS.1 You can feel the glory of current-day American scientific progress, the power of the US, the world's number one power.

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Dissertations / Theses on the topic "Weightless environment"

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Adeolu, Ayano. "Leonid Kadenyuk – the first ukrainian cosmonaut." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21763.

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Armstrong, James R. "Boolean weightless neural network architectures." Thesis, University of Central Lancashire, 2011. http://clok.uclan.ac.uk/5325/.

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A collection of hardware weightless Boolean elements has been developed. These form fundamental building blocks which have particular pertinence to the field of weightless neural networks. They have also been shown to have merit in their own right for the design of robust architectures. A major element of this is a collection of weightless Boolean sum and threshold techniques. These are fundamental building blocks which can be used in weightless architectures particularly within the field of weightless neural networks. Included in these is the implementation of L-max also known as N point thresholding. These elements have been applied to design a Boolean weightless hardware version of Austin’s ADAM neural network. ADAM is further enhanced by the addition of a new learning paradigm, that of non-Hebbian Learning. This new method concentrates on the association of ‘dis-similarity’, believing this is as important as areas of similarity. Image processing using hardware weightless neural networks is investigated through simulation of digital filters using a Type 1 Neuroram neuro-filter. Simulations have been performed using MATLAB to compare the results to a conventional median filter. Type 1 Neuroram has been tested on an extended collection of noise types. The importance of the threshold has been examined and the effect of cascading both types of filters was examined. This research has led to the development of several novel weightless hardware elements that can be applied to image processing. These patented elements include a weightless thermocoder and two weightless median filters. These novel robust high speed weightless filters have been compared with conventional median filters. The robustness of these architectures has been investigated when subjected to accelerated ground based generated neutron radiation simulating the atmospheric radiation spectrum experienced at commercial avionic altitudes. A trial investigating the resilience of weightless hardware Boolean elements in comparison to standard weighted arithmetic logic is detailed, examining the effects on the operation of the function when implemented on hardware experiencing high energy neutron bombardment induced single event effects. Further weightless Boolean elements are detailed which contribute to the development of a weightless implementation of the traditionally weighted self ordered map.

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Book chapters on the topic "Weightless environment"

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Munis, James R. "Doctor Dolittle Visits a Sitting Case." In Just Enough Physiology, 27–41. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199797790.003.0004.

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Any acceptable model must explain why the cerebral circulation must be robust enough to contend with different head positions yet continues to work in weightless environments (ie, during space flight) and it must explain the clinical phenomenon of air embolism, which is what happens when air gets sucked into perforated veins or sinuses when the surgical site is above the heart. 2 models of the cerebral circulation: the first is a common-sense model that most of us would draw without having thought about it much; the second is a model that makes a lot more physical sense and answers the questions above in a way that the first model cannot. The main difference between these models is that the correct one takes into account the principle of the siphon, whereas the incorrect one does not. A siphon is any arrangement of fluid-filled tubing that excludes air and is open on both ends to allow flow. It happens that the cerebral circulation functions like a siphon.

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Munis, James R. "Putting It All Together—Manned Space Flight." In Just Enough Physiology, 149–56. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199797790.003.0019.

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There are 3 main sources of pressure in physiology: atmospheric, hydrostatic, and mechanical. Unless a feasible method to generate ‘artificial gravity’ is developed, the astronauts on board will experience about 888 days of weightlessness during a Mars mission. What does this mean physiologically? The mechanical pressures generated by the heart, blood vessels, and the muscles of respiration will remain unchanged, except for whatever atrophy occurs during the mission. One interesting and apparently intractable problem of reduced gravity is muscle wasting. The skeletal muscles of respiration will not atrophy because they still will be constantly used and exercised. What about hydrostatic pressures? Without gravity, there is no possibility of a hydrostatic pressure gradient. What is the practical effect of losing the hydrostatic pressure gradient? Apparently, it has very little effect because astronauts survive and their brains seem to remain perfused during exposure to weightless environments. There is another physiologic challenge in space, a decrease in total blood volume, which results in orthostatic intolerance upon returning to Earth.

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Conference papers on the topic "Weightless environment"

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Hasselman, Timothy K., and Richard Quartararo. "Suspension system for large-amplitude dynamic testing in a simulated weightless environment." In 1993 North American Conference on Smart Structures and Materials, edited by Nesbitt W. Hagood and Gareth J. Knowles. SPIE, 1993. http://dx.doi.org/10.1117/12.152746.

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Miura, Y., Y. Nakamura, J. Yasuda, T. Konishi, K. Senyo, A. Furuzawa, and Y. Saitoh. "The Systematic Demonstrations of Physical Phenomena in a Weightless Environment — Examples of Active Learning." In Proceedings of the 12th Asia Pacific Physics Conference (APPC12). Journal of the Physical Society of Japan, 2014. http://dx.doi.org/10.7566/jpscp.1.017012.

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Hasselman, Timothy, and Jon Chrostowski. "Optimum distribution of static suspension forces for modal testing in a simulated weightless environment." In 36th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1165.

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Moore, Steven T. "The human response to artificial gravity in a weightless environment: Results from the Neurolab centrifugation experiments." In HADRONS AND NUCLEI: First International Symposium. AIP, 2000. http://dx.doi.org/10.1063/1.1302482.

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Roberts, Brian J., and David L. Akin. "Weightless Testing of a “Ratchetless” Extravehicular Activity Wrench." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1999. http://dx.doi.org/10.4271/1999-01-2036.

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Griffin, Brand. "Benefits of a Single-Person Spacecraft for Weightless Operations." In 42nd International Conference on Environmental Systems. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-3630.

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Slawinski, Piotr R., Weston M. Lewis, and Benjamin S. Terry. "Performance Assessment of a Noninvasive Swallowable Biosensor Deployment System in Microgravity." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65039.

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Ingestible capsule endoscope technology has been a topic of research since the middle of the 20th century and has become a prominent area of study since the commercialization of capsule endoscopy in 2000. Ingestible telemetry capsules have been investigated by NASA in the last 20 years as a means for monitoring human body temperature during periods of physical exhaustion, but are limited in sensing time due to passage through the digestive system. In this work, we present a feasibility study on a sensor that attaches to the intestinal mucosa after being delivered to the bowel via ingestible capsule to be used on long distance space flights. This study included experiments conducted on NASA’s Weightless Wonder aircraft and replicated in a laboratory setting on the ground. During these experiments, a capsule was activated, manually inserted into excised porcine small intestine, and then automatically implanted a sham sensor onto the mucosal lining. The purpose of the experiment was to determine if the automated implantation sequence is affected by microgravity. Eight trials conducted in each setting yielded successful implantation of four sham sensors in microgravity and three in earth gravity. Results suggest that automated implantation is feasible in both 1G and microgravity environments though design changes are necessary to significantly improve repeatability in both environments. Though improvements in reliability of the device are needed, this experiment is a benchmark for transferring capsule technology currently used only for visual screening of the bowel to health monitoring systems for space flights.

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