Mechanical design and development of SPRITE: a 12U CubeSat with a far-ultraviolet imaging spectrograph

Author(s):  
Dana Chafetz ◽  
Brian T. Fleming ◽  
Jack Williams ◽  
Raymie L. Fotherby ◽  
Alex Tompkins ◽  
...  
Author(s):  
Jenny Atwood ◽  
Brian Hoff ◽  
David Andersen ◽  
Jeffrey Crane ◽  
Jennifer S. Dunn

ISRN Robotics ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
R. K. Sinha ◽  
Aayush Jha ◽  
Faheem Ahmad ◽  
Vivek Mishra ◽  
Prateek Murgai ◽  
...  

This paper presents the design and development of a modular littoral autonomous underwater vehicle called “ZYRA” having six degrees of freedom for performing the following tasks underwater: target (sound sources emitting frequencies between 1 Hz and 180 KHz) localization and homing, buoy detection. The development of the AUV has been divided into, namely, five sections: mechanical design and fabrication, embedded and power systems, control and software, image processing, and underwater acoustics. A fully functional AUV has been tested in a self-created arena with different tasks spread out in a shallow water environment. Two different kinds of experimental results have been presented: first the experimental results of the SONAR module and second based on the number of successful outcomes per total number of trials for each task.


2004 ◽  
Vol 219 ◽  
pp. 254-258
Author(s):  
S. A. Sim ◽  
C. Jordan

We present results from our study of the active dwarf ∊ Eri (K2 V) based on ultraviolet spectra recorded with the Space Telescope Imaging Spectrograph and the Far Ultraviolet Spectroscopic Explorer. A combination of simple theoretical arguments and observational constraints derived from measured line fluxes are used to deduce new information about the structure of the upper transition region/corona. The area filling factor of emitting material is determined in the upper atmosphere as a function of temperature. This provides new constraints on how the magnetic field might spread out in the atmosphere of an active main sequence star. Measured emission line widths are used, together with a new semi-empirical model of the atmosphere, to place limits on the energy fluxes carried by MHD waves. These are compared with estimates of the energy input required to support the combined radiative/conductive losses in the upper atmosphere. It is shown that, in principle, waves which propagate at the Alfvén speed could provide sufficient energy to heat the corona.


Author(s):  
George R. Carruthers ◽  
Harry M. Heckathorn ◽  
Adolf N. Witt ◽  
John C. Raymond ◽  
Chet B. Opal ◽  
...  

2010 ◽  
Vol 156-157 ◽  
pp. 681-684
Author(s):  
Ting Liang Guo ◽  
Jun Liu

In this paper, puts forward a kind of design method of multi-disciplinary engineering education for product design and development. In educational globalization era, higher education has paid more and more attention to cultivate innovation type of talents, who should receive interdisciplinary education. Mechanical design is an integrative subject. Every student should have a basic ability to finish a product design or plan. As a good mechanical engineer or product designer, should know different kinds of knowledge such as mechanical, materials science, industrial design, economics and so on. Along with the development of higher education popularization, the universities pay more and more attention to the talent cultivation and fusion. Followed by many scholars at home and abroad for interdisciplinary teaching research, its essence is expounded. But although the concept of education that interdisciplinary described the basic form, but to carry out interdisciplinary education in college education environment is not easy even if everyone knows it is very important. In order to solve this problem, the first thing is to break through the traditional education ideas, the second is to set an interdisciplinary teaching organization, the third one is to build a set effective incentive mechanism. So in the paper, puts forward a design method of multi-subjects amalgamation during the education of product design and development.


1990 ◽  
Vol 139 ◽  
pp. 459-460
Author(s):  
George R. Carruthers ◽  
Harry M. Heckathorn ◽  
John C. Raymond ◽  
Reginald J. Dufour ◽  
Adolf N. Witt ◽  
...  

The study of diffuse celestial sources in the ground-inaccessible ultraviolet spectral range is less advanced than UV studies of point and compact sources. The main reason is that the characteristics of instrumentation optimized for the two types of objects are quite different. Studies of diffuse objects are best made with fast focal ratio optics with wide fields of view, whereas studies of point and compact objects are best made with large telescope aperture and high angular resolution. As a result, most space ultraviolet instruments to date (such as the International Ultraviolet Explorer and the forthcoming Hubble Space Telescope) are not well suited to the study of faint, extended diffuse objects in the ultraviolet.


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