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Articles 181 - 194 of 194
Full-Text Articles in Engineering
Stanford Student Satellite Program, Robert J. Twiggs, Bulent Altan
Stanford Student Satellite Program, Robert J. Twiggs, Bulent Altan
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs and Bulent Altan titled "Stanford Student Satellite Program" from December 20, 2002.
Cubesat Workshop: Frascati, Italy, Robert J. Twiggs
Cubesat Workshop: Frascati, Italy, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs titled "CubeSat Workshop Frascati, Italy" from October 26, 2002.
The Next Generation Of Innovative Space Engineers: University Students Are Now Getting A Taste Of Space Experience Building, Launching And Operating Their Own Space Experiments With Low-Cost Picosatellites, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
An article authored by Professor Bob Twiggs titled "The Next Generation of Innovative Space Engineers: University Students are Now Getting a Taste of Space Experience Building, Launching and Operating their own Space Experiments with Low-Cost Picosatellites" from October 22, 2002.
The Next Generation Of Innovative Space Engineers: University Students Are Now Getting A Taste Of Space Experience Building, Launching And Operating Their Own Space Experiments With Low-Cost Picosatellites, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs titled "The Next Generation of Innovative Space Engineers: University Students are Now Getting a Taste of Space Experience Building, Launching and Operating their own Space Experiments with Low-Cost Picosatellites" and presented at the 5th International ESA Conference on Guidance Navigation & Control on October 22, 2002.
Commercial Regional Space/Airborne Imaging, Ugur Akyazi, Ali Durmus, Birce Boga Bakirli, Arif Arin
Commercial Regional Space/Airborne Imaging, Ugur Akyazi, Ali Durmus, Birce Boga Bakirli, Arif Arin
Theses and Dissertations
In this work goal programming is used to solve a minimum cost multicommodity network flow problem with multiple goals. A single telecommunication network with multiple commodities (e.g., voice, video, data, etc.) flowing over it is analyzed. This network consists of: linear objective function, linear cost arcs, fixed capacities, specific origin-destination pairs for each commodity. A multicommodity network flow problem with goals can be successfully modeled using linear goal programming techniques. When properly modeled, network flow techniques may be employed to exploit the pure network structure of a multicommodity network flow problem with goals. Lagrangian relaxation captures the essence of the …
Proactive Rideshare Opportunity Brokering Services (Probs), Robert J. Twiggs, Brian Horais, Charles Byvik
Proactive Rideshare Opportunity Brokering Services (Probs), Robert J. Twiggs, Brian Horais, Charles Byvik
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professors Bob Twiggs, Brian Horais, and Charles Byvik titled "Proactive Rideshare Opportunity Brokering Services (PROBS) presented at the 2001 IEEE Aerospace Conference on February 26, 2001.
A Comparative Analysis Of The Iridium® And Globalstar® Satellite Transmission Paths, Kenneth E. Crowe
A Comparative Analysis Of The Iridium® And Globalstar® Satellite Transmission Paths, Kenneth E. Crowe
Theses and Dissertations
Globalstar and Iridium will provide valuable global communications assets for business, humanitarian aid and military operations. However, the level of coverage and the quality of the transmission path of these systems are strongly dependent on the latitude of the user and, due to their orbital characteristics, both systems provide reduced levels of coverage at low latitudes. Additionally, the L- and S-Band frequencies utilized by these systems are prone to ionospheric interference at low latitudes. The results of extensive simulation analysis indicate that the Globalstar constellation architecture provides a considerably better transmission path than Iridium's in several important areas, including path …
A System For Collecting Milligram Quantities Of Cloud Condensation Nuclei, Darryl J. Alofs, Donald E. Hagen, Steven D. Medley, Daniel R. White, John L. Schmitt, Allen L. Williams
A System For Collecting Milligram Quantities Of Cloud Condensation Nuclei, Darryl J. Alofs, Donald E. Hagen, Steven D. Medley, Daniel R. White, John L. Schmitt, Allen L. Williams
Mechanical and Aerospace Engineering Faculty Research & Creative Works
An Experimental System to Collect Cloud Condensation Nuclei (CCN) Onto Filters in Amounts Sufficient for Chemical Analysis is Described. This Experimental Apparatus is Designed to Process Ambient Air at a Rate of More Than 1 M3/min. Two Identical Systems Have Been Built. One is Installed in a Laboratory at Rolla, MO. the Other is Installed on an 11 M Long Trailer. the System Isolates Three Size Classes of CCN, Having Mass Median Diameters of 0.27, 0.12, and 0.075 Μm, Respectively, and Mass Collection Rates of 11.5, 1.28, and 0.13 Mg/day, Respectively. the above Sizes and Collection Rates Are Obtained from …
Dynamic Simulation Of General Aviation Cabin Environments And Occupant Restraint Systems, Mark A. Shilladay
Dynamic Simulation Of General Aviation Cabin Environments And Occupant Restraint Systems, Mark A. Shilladay
Master's Theses - Daytona Beach
After a five year study of General Aviation (GA) accidents, the National Transportation Safety Board (NTSB) has concluded that aircraft cabin environments place the occupant at high risk of suffering severe injuries in an emergency crash situation. Studies of Federal Aviation Administration (FAA) seat tests were used to form the basis of a computer analysis to address dynamic cabin environments. In this effort a simplified system of masses, springs, and dampers are used to simulate the more complex configuration of cabin structure, seat, pilot, and restraints on a personal computer. The primary objective of this study is to accurately simulate …
Application Of Influence Diagrams In Identifying Soviet Satellite Missions, Cary C. Chun
Application Of Influence Diagrams In Identifying Soviet Satellite Missions, Cary C. Chun
Theses and Dissertations
This thesis investigates the feasibility of applying influence diagrams to capture expert knowledge and incorporate decision theory to construct a Soviet satellite mission prediction model. Before a Soviet launch occurs, formulations of the model's prior probability distribution allows the input of expert knowledge and any available information. As the predictive variables of the model become known, the information is used to successively refine the estimate of the probable mission, thereby, reducing the uncertainty in the model. Discretizing is used to approximate continuous variables as discrete variables which successfully allows the combination of both variable types in a single influence diagram …
Space Focus, Space Enterprises, Inc.
Information Free/Men Of Science, Space Enterprises, Inc.
Information Free/Men Of Science, Space Enterprises, Inc.
Space Journal
No abstract provided.
Space Books, Rocket City Astronomical Association, Space Enterprises, Inc.
Space Books, Rocket City Astronomical Association, Space Enterprises, Inc.
Space Journal
No abstract provided.
Implications Of Soviet Progress In Science And Engineering, J G. Mayton
Implications Of Soviet Progress In Science And Engineering, J G. Mayton
Space Journal
No abstract provided.