Unsupervised classification of Space Acceleration Measurement System (SAMS) data using ART2-A [0.03%]
用ART2-A对空间加速度测量系统(SAMS)数据进行无监督分类
A D Smith,A Sinha
A D Smith
The Space Acceleration Measurement System (SAMS) has been developed by NASA to monitor the microgravity acceleration environment aboard the space shuttle. The amount of data collected by a SAMS unit during a shuttle mission is in the severa...
M A Kacena,P Todd
M A Kacena
Previous investigations have shown that liquid bacterial cultures grown in space flight were not killed as effectively by antibiotic treatments as were cultures grown on Earth. However, the cause for the decreased antibiotic effectiveness r...
Self-organizing map (SOM) of space acceleration measurement system (SAMS) data [0.03%]
空间加速测量系统(SAMS)数据的自组织特征映射(SOM)分析
A Sinha,A D Smith
A Sinha
In this paper, space acceleration measurement system (SAMS) data have been classified using self-organizing map (SOM) networks without any supervision; i.e., no a priori knowledge is assumed regarding input patterns belonging to a certain c...
Effects of space flight and mixing on bacterial growth in low volume cultures [0.03%]
微重力下低容积培养中细菌的生长研究及搅动对其的影响
M A Kacena,B Manfredi,P Todd
M A Kacena
Previous investigations have shown that liquid suspension bacterial cultures grow to higher cell concentrations in spaceflight than on Earth. None of these studies included ground-control experiments designed to evaluate the fluid effects p...
Comparative Study
Microgravity science and technology. 1999;12(2):74-7. DOI: 1999
M Porst,M Lebert,D P Hader
M Porst
Euglena gracilis, a unicellular photosynthetic flagellate, serves as a model system in signal transduction research. To further study its complex gravitaxis, experiments under microgravity are desirable. In preparation for long-term experim...
Dynamics of a microcarrier particle in the simulated microgravity environment of a rotating-wall vessel [0.03%]
微重力环境下旋转壁容器中微载体颗粒的动力学行为研究
H Gao,P S Ayyaswamy,P Ducheyne
H Gao
Rotating-wall vessel (RWV), a low-shear, low turbulence microcarrier culture system provides a simulated microgravity environment suitable for 3-dimensional tissue culture. In this paper, the motion of a microcarrier particle in the rotatin...
Comparative Study
Microgravity science and technology. 1997;10(3):154-65. DOI: 1997
Long-term exposure to spaceflight conditions affects bacterial response to antibiotics [0.03%]
长期太空环境影响细菌对抗生素的反应
M A Juergensmeyer,E A Juergensmeyer,J A Guikema
M A Juergensmeyer
Bacteria exposed to the spaceflight environment have been shown to have an increased growth rate and an increased resistance to antibiotics. The mechanism of resistance has not yet been identified, as the resistance is quickly lost upon ret...
E Giachetti,F Ranaldi,A Fiusco et al.
E Giachetti et al.
This paper deals with a microgravity experiment concerning the EMEC project (Effect of Microgravity on Enzymatic Catalysis), performed during the parabolic flight of the sounding rocket MASER 7, launched from the base of Esrange (Kiruna, Sw...
Y Gaubin,F Croute,B Pianezzi et al.
Y Gaubin et al.
In recent years, accumulating evidence has shown that microgravity or hypergravity may affect cell growth and differentiation. Since it is not easy to carry out researches in space or to simulate weightlessness on earth, we conducted experi...
Comparative Study
Microgravity science and technology. 1991 Feb;3(4):246-50. DOI: 1991
M L Fleet,S J Simske,A Hoehn et al.
M L Fleet et al.
The Animal Module for Autonomous space Support (A-MASS) was developed to enable 30-day spaceflight for mice on the first Commercial Experiment Transporter mission. Because space hardware did not previously exist to support mice without astr...