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Publications and Writing Samples
Publications:- GRC SHARE Strategic Knowledge Management Initiative, 2008
(nasa only) - Technical Information Update Aerospace America, volume 8, no. 12, December 2007
- Mars Settlement and Society Working Group Report Next Generation Exploration Conference Proceedings, 2006.
- History's Role in Knowledge Management NASA History Office History News and Notes article 2005 vol. 22 no. 1 pg. 14 [.pdf]
- Cognitive Styles: A review of the major theories and their application to information seeking in virtual environments [.pdf] 2003
- Preprints in Scholarly Communication: Lessons from High Energy Physics [.pdf]. See also, Presentation of Preprints in Scholarly Communication [.ppt]. See also, More Information About Preprints [.pdf] 2003
- The Information Needs of High Energy Particle Physicists [HTML Format] 2003
Sample Book Review:
Adaptive Array Systems: Fundamentals and applications
Review by: Paige C. Lucas-Stannard, Librarian NASA Glenn Research Center
Conventional signal array systems provided an advantage over single sensor recievers by compensating for beam width limitations and directivity issues. Signal arrays are used in radar, sonar, seismic, biomedical and communications systems. However, these signal array systems are susceptible to their own range of problems presented by unstable array environments. Using statistical detection and estimation theory to automatically respond to a changing array environment is the lure of adaptive array systems discussed in Adaptive Array Systems: Fundamentals and applications.
Authors Ben Allen and Mohammed Ghavami of the Center for Telecommunications Research at King's College in London present this look at array signal processing and its applications. Ghavami has previously written Ultra Wideband Signals and Systems in Communication Engineering and both authors are involved in smart antenna technologies for wireless communications.
The first four chapters provide a thorough background into antenna array systems and array signal processing. Chapter one includes detailed mathematical concepts in electrodynamics and terminology of antenna technology. This chapter is detailed enough for a undergraduate-level newcomer to antenna technology given a background in engineering mathematics. Chapters 2-4 build upon this foundation to address issues in Narrowband Array Systems (chapter 2), Wideband Array Processing (chapter 3), and Adaptive Arrays (chapter 4). These four chapters provide a thorough study of the principles and algorithms of the topic appropriate for senior-level undergraduate, graduate students or as a reference for the researcher/practicioner.
The fifth chapter takes the science detailed in chapters 1-4 and applies them to a more real-world scenario of a mobile communications system where operating environments and components are inconsistent and introduce their own imperfections. With sections on signal processing constraints, system calibration challenges, and spatial propagation parameters this chapter provides techniques to overcome common challenges in antenna array implementation and will be valuable to students and practicing systems designers.
The final chapter discusses applications of adaptive array technology in biomedical, radar, sonar, and terrestrial and space communications systems through a series of case studies.
Each chapter ends with a set of questions and problems including both mathematical and conceptual questions. The book includes a variety of black and white charts and graphs throughout the text to demonstrate concepts. Mathematical equations and derivations are also heavily featured. A detailed table of contents and index as well as a reference section adds to the usability of the book. These features greatly enhance the text and make the topic more accessible.
There are many books available dealing with antenna technology and specifically adaptive arrays. For example, Adaptive Antenna Arrays: Trends and Applicaitons (Springer, 2004) and Introduction to Adaptive Arrays (SciTech Publishing, 2003) both provide an introduction to the topic. Other books cover specific applications of the technology such as, Adaptive Array Measurements in Communications (Artech House Publishers, 2001) and Advanced Array Systems, Applications and RF Technologies: Signal Processing and its Applications (Academic Press, 2000). Allen and Ghavami's book is unique in its inclusion of both an academic look at the fundamentals of adaptive antenna technology paired with practical applications and relevant case studies that cross different fields of applications. This makes the book valuable to a wider audience.
This book is recommended for libraries serving undergraduate and graduate students as well as research libraries and libraries serving engineering professionals working in communications, radar, sonar, and biomedical fields.
Review by: Paige C. Lucas-Stannard, Librarian NASA Glenn Research Center
Conventional signal array systems provided an advantage over single sensor recievers by compensating for beam width limitations and directivity issues. Signal arrays are used in radar, sonar, seismic, biomedical and communications systems. However, these signal array systems are susceptible to their own range of problems presented by unstable array environments. Using statistical detection and estimation theory to automatically respond to a changing array environment is the lure of adaptive array systems discussed in Adaptive Array Systems: Fundamentals and applications.
Authors Ben Allen and Mohammed Ghavami of the Center for Telecommunications Research at King's College in London present this look at array signal processing and its applications. Ghavami has previously written Ultra Wideband Signals and Systems in Communication Engineering and both authors are involved in smart antenna technologies for wireless communications.
The first four chapters provide a thorough background into antenna array systems and array signal processing. Chapter one includes detailed mathematical concepts in electrodynamics and terminology of antenna technology. This chapter is detailed enough for a undergraduate-level newcomer to antenna technology given a background in engineering mathematics. Chapters 2-4 build upon this foundation to address issues in Narrowband Array Systems (chapter 2), Wideband Array Processing (chapter 3), and Adaptive Arrays (chapter 4). These four chapters provide a thorough study of the principles and algorithms of the topic appropriate for senior-level undergraduate, graduate students or as a reference for the researcher/practicioner.
The fifth chapter takes the science detailed in chapters 1-4 and applies them to a more real-world scenario of a mobile communications system where operating environments and components are inconsistent and introduce their own imperfections. With sections on signal processing constraints, system calibration challenges, and spatial propagation parameters this chapter provides techniques to overcome common challenges in antenna array implementation and will be valuable to students and practicing systems designers.
The final chapter discusses applications of adaptive array technology in biomedical, radar, sonar, and terrestrial and space communications systems through a series of case studies.
Each chapter ends with a set of questions and problems including both mathematical and conceptual questions. The book includes a variety of black and white charts and graphs throughout the text to demonstrate concepts. Mathematical equations and derivations are also heavily featured. A detailed table of contents and index as well as a reference section adds to the usability of the book. These features greatly enhance the text and make the topic more accessible.
There are many books available dealing with antenna technology and specifically adaptive arrays. For example, Adaptive Antenna Arrays: Trends and Applicaitons (Springer, 2004) and Introduction to Adaptive Arrays (SciTech Publishing, 2003) both provide an introduction to the topic. Other books cover specific applications of the technology such as, Adaptive Array Measurements in Communications (Artech House Publishers, 2001) and Advanced Array Systems, Applications and RF Technologies: Signal Processing and its Applications (Academic Press, 2000). Allen and Ghavami's book is unique in its inclusion of both an academic look at the fundamentals of adaptive antenna technology paired with practical applications and relevant case studies that cross different fields of applications. This makes the book valuable to a wider audience.
This book is recommended for libraries serving undergraduate and graduate students as well as research libraries and libraries serving engineering professionals working in communications, radar, sonar, and biomedical fields.
