Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Brian J. Tillotson"'
Autor:
Marcus Smith, Henry W. Brandhorst, Jeffrey W. Oliver, Thomas Schoelzel, Brian J. Tillotson, Nicholas Tarasenko
Publikováno v:
2012 38th IEEE Photovoltaic Specialists Conference.
Because beaming power from a laser to solar cells is an option to meet increasing power demands of the DOD and elsewhere, a terrestrial power beaming experiment was conducted to uncover issues. The 2.5 kW laser beamed at 810 nm to utilize the atmosph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::973374d880541ae82ca3ced83ba66c76
https://doi.org/10.1109/pvsc.2012.6318179
https://doi.org/10.1109/pvsc.2012.6318179
Autor:
Brian J. Tillotson
Publikováno v:
AIP Conference Proceedings.
I describe the use of a spinning tether to change the orbital plane of a payload via momentum exchange. In this concept, the tether’s rotation axis is roughly perpendicular to its orbital axis. At two points in the orbit, the tether rotates in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7be2a5afd510dc438b36ae72b0166187
https://doi.org/10.1063/1.1357971
https://doi.org/10.1063/1.1357971
Autor:
Brian J. Tillotson
Publikováno v:
28th Joint Propulsion Conference and Exhibit.
This paper describes a manned Mars mission architecture that uses planetary regolith from the moon and from Deimos as propellant and as radiation shielding. It presents a point design that uses a mass driver as a rocket engine to eject regolith prope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09c6e4cc2d3ffd78161b4792f88f5e08
https://doi.org/10.2514/6.1992-3449
https://doi.org/10.2514/6.1992-3449
Autor:
Susan C. Doll, Brian J. Tillotson
Publikováno v:
SAE Technical Paper Series.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::485038548388a65ef5771a9ac16c5479
https://doi.org/10.4271/921123
https://doi.org/10.4271/921123
Autor:
Brian J. Tillotson
Publikováno v:
The Journal of the Acoustical Society of America. 125:3483
Communication systems and apparatus to allow a user to perceive the relative spatial location or present position of other elements of interest in a control space, such as the location of a speaker participating in a telephone conference or that of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b2cc3dd2fce75f341e938c5451c930e
https://doi.org/10.1121/1.3139562
https://doi.org/10.1121/1.3139562
Publikováno v:
Space Programs and Technologies Conference.
The various propulsion options that can meet NASA's primary mission objectives of the Space Exploration Initiative are discussed. Technology developments and projections are considered for solar electric propulsion, nuclear electric propulsion, solid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f548efc94f67fede4c876bbde2ea8b1
https://doi.org/10.2514/6.1990-3822
https://doi.org/10.2514/6.1990-3822
Publikováno v:
SPIE Proceedings.
Autonomous machines such as a planetary explorer must learn from the real universe, which can be seen as a single event of infinite complexity or as an infinite set of trivial events. Current inductive learning systems generalize from a finite set of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c02fc4f152e4d4dac65a4cc4bbe6c787
https://doi.org/10.1117/12.946984
https://doi.org/10.1117/12.946984
Autor:
David L. Johnson, Brian J. Tillotson
Publikováno v:
SPIE Proceedings.
A learning autonomous robot must learn from sensor data and must decide what topics to learn about. We present the method of resolution limited quantization for learning from sensor data and the method of histogram density to guide the process of top
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b48ebb1ed35b024861711e9bfc6f4da4
https://doi.org/10.1117/12.969327
https://doi.org/10.1117/12.969327
Autor:
Brian J. Tillotson
Publikováno v:
3rd Tethers in Space/ Toward Flight International Conference.
An orbiting tether may act as a low-cost reusable upper stage in a system for launch to LEO or GEO, providing large velocity changes (at least 1 km/s) to a payload. We describe the requirements for such a tcther and discuss how these requirements aff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d49deaf77c14969ec3be52a7955ff1d6
https://doi.org/10.2514/6.1989-1585
https://doi.org/10.2514/6.1989-1585
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