WorldCat Identities

JASON Defense Advisory Group

Works: 71 works in 193 publications in 2 languages and 1,049 library holdings
Classifications: TK5103.52,
Publication Timeline
Most widely held works by JASON Defense Advisory Group
Impacts of Severe Space Weather on the Electric Grid( )

2 editions published in 2011 in English and held by 2 WorldCat member libraries worldwide

Tasked by the Department of Homeland Security, 2011 JASON Summer Study focused on the impact of space weather on the electric grid, seeking to understand 1) the current status of solar observations, warnings, and predictions, 2) the plausibility of Mr. Kappernman's worst case scenario 3) how previous solar storms have affected some power grids, and 4) what can be done at reasonable cost to protect our grid. This report builds on two previous JASON studies of different aspects of the U.S. electric grid
Rare events( Book )

2 editions published in 2009 in English and held by 2 WorldCat member libraries worldwide

JASON was asked by the Department of Defense (DoD) to conduct an evaluation of the nation's ability to anticipate and assess the risk of rare events. "Rare events" specifically refers to catastrophic terrorist events, including the use of a weapon of mass destruction or other high-profile attacks, where there is sparse (or no) historical record from which to develop predictive models based on past statistics. This study was requested by the Strategic Multi-Layer Assessment (SMA) program, which is part of the Joint Staff/J-3, STRATCOM/GISC, and the Rapid Technology Program Office within the Department of Defense Research and Engineering
Reversible logic as a strategy for computing by C Callan( Book )

1 edition published in 1984 in English and held by 1 WorldCat member library worldwide

During the 1983 Summer Study, a few members of JASON attempted to survey the current status of the reversible logic approach to digital computing. Our aim was to form an opinion on which future developments of this subject might be relevant to DARPA's computer-related interests and possibly worthy of its support. We consulted one of the pioneers in this subject, Dr. Edward Fredkin of MIT, at some length and brought ourselves up to date on the (not very extensive) literature. Our basic conclusion is that the importance of reversible logic depends crucially on the physical architecture of the computer: It is irrelevant to the current scheme in which packets of charge are stored on, and moved between, structures of order one light wavelength in size, but might be relevant and even essential if the basic information-handling units were of molecular or atomic size (a distant but not necessarily unattainable goal). The question of physical realization of reversible logic elements has been almost completely neglected in favor of the abstract questions of how, given the existence of reversible logic elements, one could wire them up to make a useful computer and how one would program it
Bispectra( Book )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

This report provides an introduction to bispectral analysis. Four inter-related sections are provided: a primer introducing auto- and cross- bispectrum; a discussion of the detectability of a signal though its spectrum and bispectrum; a description of some experiments in which numerically generated signals were subjected to power-spectral and bispectral analyses; an application to a class of signals one might expect to be produced by submarines. Originator-supplied keywords included: bispectrum; ASW, inter-frequency phase; acoustics; spectral analysis
Human performance( )

1 edition published in 2008 in English and held by 1 WorldCat member library worldwide

The tasking for this study was to evaluate the potential for adversaries to exploit advances in Human Performance Modification, and thus create a threat to national security. In making this assessment, we were asked to evaluate long-term scenarios. We have thus considered the present state of the art in pharmaceutical intervention in cognition and in brain-computer interfaces, and considered how possible future developments might proceed and be used by adversaries
SEASAT Report( Book )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

This report is concerned with the narrow V-shaped wakes seen behind surface ships by the SEASAT synthetic aperture radar. The authors do not believe that the V-shaped wakes seen by the SEASAT satellite are external waves because ship wakes are three to four orders of magnitude too weak to explain the observed radar returns. If the V-shaped wakes are not produced by internal waves, then by default they must be manifestations of the Kelvin wake. Present understanding of rear axis generation of Kelvin wakes ('thin ship theory') does not adequately explain the effects seen by SEASAT-non-linear effects probably need to be included. Also ships propeller-generated Kelvin wakes do not appear to be strong enough to create the wakes seen. Consequently, we are left with a somewhat unsatisfying situation. We believe that narrow wakes cannot be produced by ship generated internal waves, (except under extreme conditions) because these are too weak by three to four orders of magnitude. Therefore, they must be due to the Kelvin wake. But we have not yet been able to analyze the Kelvin wake sufficiently well theoretically to identify just which feature of the Kelvin wake SEASAT is seeing
Tritium( Book )

1 edition published in 2011 in English and held by 0 WorldCat member libraries worldwide

Tritium breeding is an essential component of potential future GWE sources of electrical energy on nuclear fusion. Such reactors require kg quantities of tritium per year of operation which must be bred as part of the overall reactor cycle. Traditionally, tritium is assumed to be bred from neutrons involved in fusion energy-production processes of the particular type of reactor using a lithium (Li) "blanket" or related alloys such as the Pb-17Li eutectic. As such tritium breeding is intimately connected with energy production, thermal management, radioactively management, materials properties, and mechanical structures of any plausible future large-scale fusion power reactor. JASOM is asked to examine the current state of scientific knowledge and engineering practice on the physical and chemical bases for large-scale tritium breeding
Audience Level
Audience Level
  Kids General Special  
Audience level: 0.33 (from 0.30 for The Jasons ... to 1.00 for SEASAT Rep ...)

Alternative Names
Comité JASON

JASON Defense Advisory Group amerikanische Organisation

JASON (Spojené státy americké)


JASON (顧問團)

Jasons (Spojené státy americké)

Jasons (U.S.)