Communications - Decibel,
2014
Morehead State University
Communications - Decibel, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs titled "Communications - Decibel" from February 11, 2014.
Power Storage & Control: Review With Questions,
2014
Morehead State University
Power Storage & Control: Review With Questions, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs on "Power Storage & Control: Review with Questions" from February 4, 2015.
Basic Number Sysyems,
2014
Morehead State University
Basic Number Sysyems, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs on "Basic Number Systems" from January 14, 2014.
Sse-122 Satellites & Space Systems, Spring 2014,
2014
Morehead State University
Sse-122 Satellites & Space Systems, Spring 2014, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A syllabus created by Professor Bob Twiggs for Space Science Engineering - Satellites & Space Systems (SSE 122) on January 14, 2014.
Landsat-8: Science And Product Vision For Terrestrial Global
Change Research,
2014
South Dakota State University
Landsat-8: Science And Product Vision For Terrestrial Global Change Research, David P. Roy, M. A. Wulder, T. R. Loveland, C. E. Woodcock, R. G. Allen, M. C. Anderson, D. Helder, J. R. Irons, D. M. Johnson, R. Kennedy, T. A. Scambos, C. B. Schaaf, J. R. Schott, Y. Sheng, E. F. Vermote, A. S. Belward, R. Bindschadler, W. B. Cohen, F. Gao, J. D. Hipple, P. Hostert, Desert Research Institute, Reno, Nv, C. O. Justice, Ayse Kilic, V. Kovalskyy, Z. P. Lee, L. Lymburner, J. G. Masek, J. Mccorkel, Y. Shuai, R. Trezza, J. Vogelmann, R. H. Wynne, Z. Zhu
School of Natural Resources: Faculty Publications
Landsat 8, a NASA and USGS collaboration, acquires global moderate-resolution measurements of the Earth's terrestrial and polar regions in the visible, near-infrared, short wave, and thermal infrared. Landsat 8 extends the remarkable 40 year Landsat record and has enhanced capabilities including new spectral bands in the blue and cirrus cloud-detection portion of the spectrum, two thermal bands, improved sensor signal-to-noise performance and associated improvements in radiometric resolution, and an improved duty cycle that allows collection of a significantly greater number of images per day. This paper introduces the current (2012–2017) Landsat Science Team's efforts to establish an initial understanding of …
A Design Pathfinder With Material Correlation Points For Inflatable Systems,
2014
University of Kentucky
A Design Pathfinder With Material Correlation Points For Inflatable Systems, Jared T. Fulcher
Theses and Dissertations--Mechanical and Aerospace Engineering
The incorporation of inflatable structures into aerospace systems can produce significant advantages in stowed volume to mechanical effectiveness and overall weight. Many applications of these ultra-lightweight systems are designed to precisely control internal or external surfaces, or both, to achieve desired performance. The modeling of these structures becomes complex due to the material nonlinearities inherent to the majority of construction materials used in inflatable structures. Furthermore, accurately modeling the response and behavior of the interfacing boundaries that are common to many inflatable systems will lead to better understanding of the entire class of structures. The research presented involved using nonlinear …
Multidimensional Modeling Of Pyrolysis Gas Transport Inside Orthotropic Charring Ablators,
2014
University of Kentucky
Multidimensional Modeling Of Pyrolysis Gas Transport Inside Orthotropic Charring Ablators, Haoyue Weng
Theses and Dissertations--Mechanical and Aerospace Engineering
During hypersonic atmospheric entry, spacecraft are exposed to enormous aerodynamic heat. To prevent the payload from overheating, charring ablative materials are favored to be applied as the heat shield at the exposing surface of the vehicle. Accurate modeling not only prevents mission failures, but also helps reduce cost. Existing models were mostly limited to one-dimensional and discrepancies were shown against measured experiments and flight-data. To help improve the models and analyze the charring ablation problems, a multidimensional material response module is developed, based on a finite volume method framework. The developed computer program is verified through a series of test-cases, …
Load Transfer In An Isolated Particle Embedded Within An Epoxy Matrix,
2014
University of Central Florida
Load Transfer In An Isolated Particle Embedded Within An Epoxy Matrix, Erik Durnberg
Electronic Theses and Dissertations
Particulate composites are widely used in many aerospace applications such as protective coatings, adhesives, or structural members of a body and their mechanical properties and behavior have gained increasing significance. The addition of modifiers such as alumina generally leads to improved mechanical properties. This addition also enables the non-invasive study of the load transfer between the particle and the matrix. Understanding the load transfer between the particulate and the matrix material is the first step to understanding the behavior and mechanical properties of the composite as a whole. In this work, samples with an isolated alumina particle embedded in an …
Space Tourism: Hurdles And Hopes,
2014
Embry-Riddle Aeronautical University
Space Tourism: Hurdles And Hopes, Robert A. Goehlich
Publications
According to the Space Policy Institute (2002, Bib. section), “Space tourism is the term broadly applied to the concept of paying customers traveling beyond Earth’s atmosphere.” Operating reusable launch vehicles (RLVs) might be a first step toward achieving mass space tourism. Thus, the aim of this article is to investigate the potential hurdles and other aspects of importance that must be overcome in order to use RLVs for space tourism flights. The primary ones are social issues (e.g., “Is space tourism ethically acceptable?”), institutional issues (e.g., “Is environmental pollution caused by space tourism more harmful than other emission sources?”), and …
Development And Operation Of The Pocketqube T-Logoqube,
2014
Morehead State University
Development And Operation Of The Pocketqube T-Logoqube, Kevin Zack
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Kevin Zack titled "Development and Operation of the PocketQube T-LogoQube" from April 22, 2014.
Analysis Of An Inflatable Gossamer Device To Efficiently De-Orbit Cubesats,
2013
California Polytechnic State University, San Luis Obispo
Analysis Of An Inflatable Gossamer Device To Efficiently De-Orbit Cubesats, Robert A. Hawkins Jr.
Master's Theses
There is an increased need for spacecraft to quickly and efficiently de-orbit themselves as the amount of debris in orbit around Earth grows. Defunct spacecraft pose a significant threat to the LEO environment due to their risk of fragmentation. If these spacecraft are de-orbited at the end of their useful life their risk to future spacecraft is greatly lessened. A proposed method of efficiently de-orbiting spacecraft is to use an inflatable thin-film envelope to increase the body's area to mass ratio and thusly shortening its orbital lifetime. The system and analysis presented in this project is sized for use on …
Understanding Orbits Orbit Perturbations,
2013
Morehead State University
Understanding Orbits Orbit Perturbations, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs on "Understanding Orbits Orbit Perturbations" on November 14, 2013.
Understanding Orbits Orbit Facts,
2013
Morehead State University
Understanding Orbits Orbit Facts, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs on "Understanding Orbits Orbit Facts" on November 14, 2013.
Understanding Orbits Eclipses,
2013
Morehead State University
Understanding Orbits Eclipses, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs on "Understanding Orbits Eclipses" on November 14, 2013.
Mech/Engr 371 Space Systems Design And Engineering: Introduction To Systems Engineering,
2013
Santa Clara University
Mech/Engr 371 Space Systems Design And Engineering: Introduction To Systems Engineering, Christopher Kitts
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Christopher Kitts of Santa Clara University on "MECH/ENGR 371 Space Systems Design and Engineering: Introduction to Systems Engineering" on November 12, 2013.
Spacecraft Subsystems - Class Presentation,
2013
Morehead State University
Spacecraft Subsystems - Class Presentation, Kevin Brown
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Kevin Brown on "Spacecraft Subsystems" on November 6, 2013.
Satellite Orbits An Introduction To Orbital Mechanics,
2013
Morehead State University
Satellite Orbits An Introduction To Orbital Mechanics, Ben Malphrus
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation delivered by Professor Ben Malphrus on "Satellite Orbits An Introduction to Orbital Mechanics" on October 31, 2013.
Space Systems Engineering Sse 120 - Fall 2013 Space Lecture,
2013
Morehead State University
Space Systems Engineering Sse 120 - Fall 2013 Space Lecture, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
Space Systems Engineering SSE 120 - Fall 2013, Space Lecture presented by Professor Bob Twiggs on October 15, 2013.
Space Environment-I Lecture - Powerpoint Presentation,
2013
Morehead State University
Space Environment-I Lecture - Powerpoint Presentation, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
Professor Bob Twiggs PowerPoint lecture on Space Environment presented on October 14, 2013.
Space Systems Engineering Sse 120 - Space Lecture, Fall 2013,
2013
Morehead State University
Space Systems Engineering Sse 120 - Space Lecture, Fall 2013, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
Professor Bob Twiggs' preview questions for his space lecture on Space Systems Engineering SSE 120 delivered on October 14, 2013.
