Download or read book Terrain Constraints on the Design Testing and Deployment of the Gator Mine written by Jerry R. Lundien and published by . This book was released on 1976 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests of the GATOR mine in various terrains within the United States indicated that a non-uniform sensitivity existed in its AP seismic sensor. It was demonstrated that soil characteristics can affect sensor sensitivity, causing the mine to detonate when the target is beyond warhead lethal range, or causing it not to detonate at all. Using computer models that were validated through field studies, this report attempts to predict the expected sensitivity of the GATOR AP seismic sensor. A terrain matrix, made up of elements describing surface and subsurface terrain layers that affect target-induced seismic signal generation and propagation, was developed to define environmental parameter variation. Computer model signals were generated using the matrix results for input to the GATOR mine logic. The results were utilized to define mine-performance changes over the environmental parameter ranges. Terrain property combinations which have major effects on source-to-ground energy coupling and seismic signal propagation were evaluated using microseismic generation and propagation models. The models were validated to verify if they could realistically predict, with sufficient sensitivity and reliability, time domain signals versus terrain characteristics.
Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1980 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Impact and Penetration of the Gator Mine in Earth Materials written by Jerry R. Lundien and published by . This book was released on 1976 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a study of the penetration characteristics of an air-delivered, antitank/antivehicle and antipersonnel mine (Gator mine system) as related to variations in mine impact velocity and attitude and changes in soil strength conditions and vegetation. A theoretical study, a field study, and a mapping study were pursued to estimate worldwide mine penetration performance. The theoretical results are presented in terms of relations of impact velocity (specific velocity ranges) versus maximum depth of penetration and maximum deceleration for various terrain materials. The field study was conducted using an air gun, and the results are presented in terms of relations of impact velocity, depth of penetration, impact angle, impact attitude, and terrain material strength characteristics. In the mapping study the results of the theoretical and field studies were used to estimate the probability of successful emplacement (i. e., in a position suitable for activation) of the mines in any region of the world. The results obtained from the theoretical study show that, for the normal range of impact velocity, penetration is excessive in clay and sandy clay soils, intermediate in sands, and acceptable in frozen ground and rock. The results obtained from the field study showed that penetration was excessive in lean and fat clay soils when the mine impact angle was 90 degrees. Penetration performance becomes more satisfactory as the impact angle decreases. The results of the mapping study show that a large portion of the world has surface soils too soft to allow acceptable emplacement when the impact angle is 90 degrees. Reducing this angle to 45 degrees will allow acceptable emplacement in many regions.
Download or read book PSTIAC Report written by Waterways Experiment Station (U.S.) Pavements and Soil Trafficability Information Analysis Center and published by . This book was released on 1977-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Acoustical Society of America written by and published by . This book was released on 1977 with total page 1334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1978 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Army Logistician written by and published by . This book was released on 1987 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: The official magazine of United States Army logistics.
Download or read book Proceedings of the IEEE 1987 National Aerospace and Electronics Conference NAECON 1987 written by and published by . This book was released on 1987 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine Countermine Operations written by Department of the Army and published by Createspace Independent Pub. This book was released on 2013-06-08 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: The guidance provided focuses on individual skills of emplacing and removing mines, team and squad tasks, platoon and company organization and panning, and battalion/task force organization and coordination for successful obstacle reduction and breaching operations.
Download or read book Metal Detector Handbook for Humanitarian Demining written by Dieter Guelle and published by . This book was released on 2003-01-01 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Democracy and Education written by John Dewey and published by Createspace Independent Publishing Platform. This book was released on 1916 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: . Renewal of Life by Transmission. The most notable distinction between living and inanimate things is that the former maintain themselves by renewal. A stone when struck resists. If its resistance is greater than the force of the blow struck, it remains outwardly unchanged. Otherwise, it is shattered into smaller bits. Never does the stone attempt to react in such a way that it may maintain itself against the blow, much less so as to render the blow a contributing factor to its own continued action. While the living thing may easily be crushed by superior force, it none the less tries to turn the energies which act upon it into means of its own further existence. If it cannot do so, it does not just split into smaller pieces (at least in the higher forms of life), but loses its identity as a living thing. As long as it endures, it struggles to use surrounding energies in its own behalf. It uses light, air, moisture, and the material of soil. To say that it uses them is to say that it turns them into means of its own conservation. As long as it is growing, the energy it expends in thus turning the environment to account is more than compensated for by the return it gets: it grows. Understanding the word "control" in this sense, it may be said that a living being is one that subjugates and controls for its own continued activity the energies that would otherwise use it up. Life is a self-renewing process through action upon the environment.
Download or read book Gulf War Air Power Survey written by Thomas A. Keaney and published by . This book was released on 1993 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On Point written by Gregory Fontenot and published by . This book was released on 2005 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Den amerikanske hærs første officielle historiske beretning om operationerne i den anden Irakiske Krig, "Operation Iraqi Freedom", (OIF). Fra forberedelserne, mobiliseringen, forlægningen af enhederne til indsættelsen af disse i kampene ved Talil og As Samawah, An Najaf og de afsluttende kampe ved Bagdad. Foruden en detaljeret gennemgang af de enkelte kampenheder(Order of Battle), beskrives og analyseres udviklingen i anvendte våben og doktriner fra den første til den anden Golf Krig.
Download or read book The Army Air Forces in World War II Men and planes written by and published by . This book was released on 1948 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 2240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Challenge of Crime in a Free Society written by United States. President's Commission on Law Enforcement and Administration of Justice and published by . This book was released on 1967 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report of the President's Commission on Law Enforcement and Administration of Justice -- established by President Lyndon Johnson on July 23, 1965 -- addresses the causes of crime and delinquency and recommends how to prevent crime and delinquency and improve law enforcement and the administration of criminal justice. In developing its findings and recommendations, the Commission held three national conferences, conducted five national surveys, held hundreds of meetings, and interviewed tens of thousands of individuals. Separate chapters of this report discuss crime in America, juvenile delinquency, the police, the courts, corrections, organized crime, narcotics and drug abuse, drunkenness offenses, gun control, science and technology, and research as an instrument for reform. Significant data were generated by the Commission's National Survey of Criminal Victims, the first of its kind conducted on such a scope. The survey found that not only do Americans experience far more crime than they report to the police, but they talk about crime and the reports of crime engender such fear among citizens that the basic quality of life of many Americans has eroded. The core conclusion of the Commission, however, is that a significant reduction in crime can be achieved if the Commission's recommendations (some 200) are implemented. The recommendations call for a cooperative attack on crime by the Federal Government, the States, the counties, the cities, civic organizations, religious institutions, business groups, and individual citizens. They propose basic changes in the operations of police, schools, prosecutors, employment agencies, defenders, social workers, prisons, housing authorities, and probation and parole officers.
