The United States and Mexico have a close and complex bilateral relationship, with extensive economic linkages as neighbors and partners under the North American Free Trade Agreement (NAFTA). Bilateral relations are characterized by strong commercial and cultural ties and cooperation on a range of bilateral and international issues. In recent years, security issues have dominated the bilateral agenda, as the United States has supported Mexican President Felipe Calderon's campaign against drug...
Topics: DTIC Archive, LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE, *UNITED STATES,...
The proposed deepening of the Southwest Pass of the Mississippi River to 55 feet is analyzed for its impacts on flow distributions and sedimentation changes. Results from two-dimensional numerical hydrodynamic and sediment transport models for a variety of plans and flow conditions are presented. The US Army Corps of Engineers TABS-2 modeling system is used. The constructed models cover the entire Mississippi River Delta downstream of Venice, Louisiana.
Topics: DTIC Archive, Richards, D R, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS...
Stable local oscillators based on surface acoustic wave (SAW) resonators have been proposed for future use in Army electronic systems designed for airborne and vehicular applications. The vibration spectra of these systems in conjunction with the vibration sensitivity of the SAW resonators leads to a degradation in oscillator phase noise, which may then exceed the total allowable system phase noise. This report details a study of the vibration-induced phase noise in a group of SAW oscillators...
Topics: DTIC Archive, Kosinski, John, ARMY LAB COMMAND FORT MONMOUTH NJ ELECTRONICS TECHNOLOGY AND DEVICES...
The use of weakest-precondition predicate transformers in the derivation of sequential, process-control software is discussed. Only the extension to Dijkstra's calculus for deriving ordinary sequential programs was found to be necessary: function-valued auxiliary variables. These auxiliary variables are needed for reasoning about states of a physical process that exist during program transitions. Keywords: Real-time software, Process-control software, Weakest preconditions, Auxiliary variables,...
Topics: DTIC Archive, Marzullo, Keith, CORNELL UNIV ITHACA NY DEPT OF COMPUTER SCIENCE, *REAL TIME,...
The focus of this research was in real flow effects in propeller hydrodynamics. A total of 7 journal and symposium papers have been published. A list of the publications is provided the report concludes with three selected excerpts describing technically what is considered to have been some of the more important results of the research effort. These topics include Effect of variable Bernoulli head on the configuration of propeller blades trailing vortex sheets, A first-order model for leading...
Topics: DTIC Archive, Vorus, William S, MICHIGAN UNIV ANN ARBOR DEPT OF NAVAL ARCHITECTURE AND MARINE...
The Air Force Occupational and Environmental Health Laboratory conducted a photon energy dependence evaluation of Keithley Inc's 36000 series ion chamber radiation survey meter. This information was used to determine the applicability of the manufacturer's calibration procedure, which uses low energy x-rays, to the measurement of high energy photon emitting sources.
Topics: DTIC Archive, Hoak, William V, ARMSTRONG LAB BROOKS AFB TX, *PHOTONS, MANUFACTURING, ENERGY,...
The Advanced Air Deployable Array (AdDA), which is a modern air- dropped fiber optic ASW device, provides an opportunity for the rapid enclosure of a hostile submarine in shallow waters. This thesis explores the effect of the deployment depth, and effect of using longer or shorter AdDA array segments, on the performance of eighth proposed AdDA deployment tactics which employ single or dual aircraft. It is shown that when the AdDA sinking rate is considered, several of the proposed tactics...
Topics: DTIC Archive, Aktan, Zafer M, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *FIBER OPTICS, *CABLES,...
This study is concerned with the development of efficient nonlinear materials which can generate 3-5 microns infrared (IR). Work involved the use of Ca and Sr metal vapors as electronic Raman scattering (SRS). This involved the development of narrow bandwidth pulse lasers, scattering cells, high speed IR detectors, and suitable experimental diagnostics to study the gain for SRS and its temporal development. It was found that SRS never generated, but instead, a variety of other nonlinear...
Topics: DTIC Archive, Kelly, Jim, IDAHO UNIV MOSCOW DEPT OF PHYSICS, *RAMAN SPECTROSCOPY, *LASERS, *METAL...
The Global Positioning System (GPS) is revolutionizing the science of navigation. Never before has there been a system that could provide real time, world wide, continuous coverage with the such precision. Yet, the accuracy achievable with GPS alone is not sufficient to achieve autonomous flight of an Unmarined Aerial Vehicle. However, when integrated with an Inertial Navigation System and other non-inertial sensors using a Kalman Filter, GPS supplies the critical positioning information to...
Topics: DTIC Archive, Twite, Eric, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *GLOBAL POSITIONING SYSTEM,...
Current analyses dictate that for economic viability photovoltaic arrays should have a service life of 2O years or more. A need exists for meaningful accelerated tests to predict array life so that a relatively quick assessment can be made of the potential of present developmental designs and of the extent to which improvements in life are needed. As a part of the Encapsulation Task of the LSSA Project, this study undertook to develop a methodology for designing aging tests in which life...
Topics: DTIC Archive, Gaines, G. B., BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS, *SOLAR CELLS, *LIFE...
Since the appearance of Local Area Networks (LANs), their use and bandwidth consumption have increased considerably. Users are now seeking new technologies to satisfy their bandwidth demand. Many consider ATM as the solution to their needs. Though ATM is fairly new networking technology, it has made several strides, and is now considered a viable technology that is applicable LAN environment. However, migrating from today's shared-medium LANs (Token-Ring and Ethernet) to an ATM LAN exposes a...
Topics: DTIC Archive, Williams, Robert, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *LOCAL AREA NETWORKS, *USER...
This report from the USSR contains articles on Science and Technology.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *USSR, *SPACE TECHNOLOGY, *NUCLEAR...
Successful economic reform and the transition to a free-market economy under a stable political system is the key to Ukraine's successful road to a new democratic beginning. Western assistance should primarily serve in an advisory role to stabilize the Ukrainian government, establish a viable rule of law, rudimentary representative government, and a system to protect individual and investment capital followed by direct investment and joint economic ventures with Ukrainian companies. This paper...
Topics: DTIC Archive, Davis, James S., AIR WAR COLL MAXWELL AFB AL, *POLICIES, *POLITICAL SCIENCE,...
The leukocidins are bicomponent pore-forming toxins that are structurally related to staphylococcal alpha-hemolysin, a single component toxin. alpha-Hemolysin has many applications in the area of biomolecular materials. Therefore, leukocidins have now been characterized to expand the set of tools available for materials engineering. The approach taken in the AASERT project was to obtain genes for the two components of the toxin, to express them in E. coli, to characterize the heterologously...
Topics: DTIC Archive, Bayley, Hagan, TEXAS A AND M UNIV COLLEGE STATION HEALTH SCIENCE CENTER, *GENETICS,...
The detonations of a high explosive in contact with a metal plate can cause the plate to spall or fracture. In order to quantitatively describe the phenomena a one-dimensional model of the H. E. plate system is assumed. The problem is then analyzed in terms of the interactions of compression and rarefaction waves. Quantitative predictions of spall using the one-dimensional model are compared to experiment and the agreement is found to be good.
Topics: DTIC Archive, Lawrence, Ernest O, CALIFORNIA UNIV LIVERMORE RADIATION LAB, *EXPLOSION EFFECTS,...
The United States' response to international terrorism after the attacks of 11 September 2001 is accepted as inevitable by most Southeast Asia countries, probably necessary, but not of vital strategic significance to Southeast Asia. Increased American engagement and expenditure are generally welcomed but are not seen as immediately positive or negative for regional security. Southeast Asians are most concerned with the region's long-term stability. Specific worries are Indonesia's management of...
Topics: DTIC Archive, Rolfe, Jim, ASIA-PACIFIC CENTER FOR SECURITY STUDIES HONOLULU HI, *NATIONAL SECURITY,...
We have developed two experimental schemes that can be used to implement the Factorized Quantum Lattice-Gas Algorithm for the 1 D Diffusion Equation with Persistent-Current Qubits. One scheme involves biasing the PC Qubit at multiple flux bias points throughout the course of the algorithm. An implementation analogous to that done in Nuclear Magnetic Resonance Quantum Computing is also developed. Errors due to a few key approximations utilized and differences between the PC Qubit and NMR systems...
Topics: DTIC Archive, Berggren, Karl K, MASSACHUSETTS INST OF TECH CAMBRIDGE, *ELECTRON BEAMS,...
The southern cattle tick Rhipicephalus (Boophilus) microplus (Bm) is a vector of bovine babesiosis and anaplasmosis. Tick resistance to organophosphate (OP) acaricide involves acetylcholinesterase (AChE) insensitivity to OP and metabolic detoxification. Sequencing and in vitro expression of Bm genes encoding AChE allowed biochemical characterization of three BmAChEs expressed in tick synganglion. rBmAChE1, rBm- AChE2 and rBmAChE3 exhibited substrate preference for acetylthiocholine, high...
Topics: DTIC Archive, AGRICULTURAL RESEARCH SERVICE WASHINGTON DC ENTOMOLOGY RESEARCH DIV,...
This is the final report for a project that was in a series of projects on the development and validation of the EPIC cognitive architecture for modeling human cognition and performance. This project focussed on extending the architecture to account for sound and speech phenomena, with emphasis on multichannel speech comprehension in a simple command-and-control task for which considerable empirical data is available. Additional work concerned application of the EPIC architecture to Navy...
Topics: DTIC Archive, MICHIGAN UNIV ANN ARBOR DIV OF RESEARCH DEVELOPMENT AND ADMINISTRATION, *MAN COMPUTER...
PURPOSE: The purpose of this Technical Note is to provide basic information on the operation of fusegates and their use for flood control projects. A brief description of a site specific fusegate model study performed for the U.S. Army Engineer District, Sacramento is also included. INTRODUCTION: Fusegates were invented in 1989 as a simple and safe system to increase reservoir storage or spillway capacity. The system has been patented by Hydroplus International in the United States, Europe, and...
Topics: DTIC Archive, ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB,...
Microbial forensics is a relatively new scientific discipline dedicated to analysing microbiological evidence from a crime for attribution purposes. It builds on traditional microbiology and epidemiology but within a legal framework. Important motives for forensic investigations include interdiction of criminals, prosecution of justice, and ideally, deterrence of others from committing similar acts. Forensic capabilities in animal health should focus on building capacity for detection and...
Topics: DTIC Archive, DEPARTMENT OF AGRICULTURE RIVERDALE MD ANIMAL AND PLANT HEALTH INSPECTION SERVICE,...
Isolated human PMNs served as a model to determine oxyhemoglobin (oxyHb) binding and the effects of oxymyoglobin (oxyMb) or oxyHb on production of both nitric oxide (NO) and superoxide (O2-) and the resulting cytotoxicity. Physiologically relevant concentrations of NO and H2O2 oxidized, to a similar extent, 2,7-dichlorodihydro-fluorescein (DCFH) loaded into polymorphonuclear neutrophils (PMNs). Activation of PMNs with phorbol 12-myristate 13-acetate (PMA) markedly increased the internalization...
Topics: DTIC Archive, ARMY INST OF SURGICAL RESEARCH FORT SAM HOUSTON TX, *CELLS(BIOLOGY), *CYTOTOXINS,...
A high current, explosively operated slow (2 ms) opening switch has been developed for use as a first stage switch in multi stage switching of inductive storage systems. This switch eliminates the need to use large numbers (20-25 switches/megampere) of more expensive switches in inductive storage pulsed power systems where tens to hundreds of kilovolts are developed during switching of the inductive store. Switch operating parameters include current density to 20 kA/cm 2 , opening time after...
Topics: DTIC Archive, NAVAL RESEARCH LAB WASHINGTON DC, *CURRENT DENSITY, *ELECTRIC GENERATORS, *LOW LOSS,...
This report contains articles on Political Affairs, Soviet Union.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *USSR, POLITICAL SCIENCE,...
The structure and hydrogen bonding of water molecules provides this unique solvent with properties essential to many physical, chemical and biological processes. The intermolecular hydrogen bonding between water molecules in the bulk medium is disrupted at the surface, imparting the surface with unique structural and thermodynamic properties. In this article we provide an overview of a range of experimental studies from this laboratory in which the structure, orientation and hydrogen bonding of...
Topics: DTIC Archive, Gragson, D. E., OREGON UNIV EUGENE DEPT OF CHEMISTRY, *HYDROGEN BONDS, *INTERFACES,...
An ice jam is an accumulation of ice in rivers that restricts flow and can cause destructive floods costly to riverine communities. Freezeup jams occur in early to midwinter when ice first forms in rivers. Breakup jams form in early spring when rising air temperature and/or rain events lead to rapid snowmelt, increases in runoff, and rapid increases in flow discharge. Ice covers break up and the resulting ice floes can become lodged at river bends, bridges, or narrow sections on the river or,...
Topics: DTIC Archive, Eames, Heidi J, COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH, *DATA BASES,...
The MHS serves approximately 8.6 million eligible beneficiaries, including active-duty military personnel and their family members (dependents), retired military personnel and their dependents, and surviving dependents of deceased military personnel. TRICARE, the program that administers health care for the DoD, includes a pharmacy benefit that provides coverage for virtually all U.S. Food and Drug Administration (FDA) approved prescription medications. Prior to fiscal year (FY) 2001, elderly...
Topics: DTIC Archive, Malkin, Jesse D, RAND NATIONAL DEFENSE RESEARCH INST SANTA MONICA CA, *MILITARY...
OVERVIEW: (1) Problem Statement; (2) Social Sciences and Network Flows: Initial mappings - Gains, losses, and thresholds - Relationships to network flow formulations; (3) Notional Example: Generalized Network Flow Problem (GFP) - Post-opportunity analyses; (4) Extend previous methodologies to generate and analyze courses of action applied to networks of individuals; (5) Overall goal - 'shaping intentions' through influence - ... in the context of military psychological operations that strive to...
Topics: DTIC Archive, Hamill, J T, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH, *PSYCHOLOGICAL...
We present results on the latest advances in thermal infrared face recognition, and its use in combination with visible imagery. Previous research has shown high performance under very controlled conditions, or questionable performance under a wider range of conditions. This paper shows results on the use of thermal infrared and visible imagery for face recognition in operational scenarios. In particular, we show performance statistics for outdoor face recognition and recognition across...
Topics: DTIC Archive, Socolinsky, Diego A, EQUINOX CORP BALTIMORE MD, *SCENARIOS, *INFRARED IMAGES,...
Traditional approaches to the problem of extracting data from texts have emphasized handcrafted linguistic knowledge. In contrast, BBN's PLUM system (Probabilistic Language Understanding Model) was developed as part of a DARPA-funded research effort on integrating probabilistic language models with more traditional linguistic techniques. Our research and development goals are * more rapid development of new applications, * the ability to train (and re-train) systems based on user markings of...
Topics: DTIC Archive, Weischedel, Ralph, BBN SYSTEMS AND TECHNOLOGIES CORP CAMBRIDGE MA, *MATHEMATICAL...
The McCallum Projection for Cylindrical Algebraic Decomposition (CAD) produces a smaller projection factor set than previous projections, however it does not always produce a sign-invariant CAD for the set of input polynomials. Problems may arise when a (k+1)-level projection factor vanishes identically over a k-level cell. According to McCallum's paper, when this happens (and the k+1 is not the highest level in the CAD) we do not know whether the projection is valid, i.e. whether or not a...
Topics: DTIC Archive, Brown, Christopher W, NAVAL ACADEMY ANNAPOLIS MD DEPT OF COMPUTER SCIENCE, *CALCULUS,...
The catastrophic terrorist attack of September 11, 2001 and the subsequent anthrax mailings have sensitized the nation to acts of domestic terrorism. The confirmation of terrorist interest in weapons of mass destruction (WMD) and the vulnerability of the United States to such attack have highlighted the potential that these weapons may be used as weapons of terror. The framework of WMD includes chemical, biological, and toxin weapons. Chemical, biological, and toxin weapons can produce mass...
Topics: DTIC Archive, Shea, Dana A, LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE,...
Recent experimental studies discovered that micrometer-scale face-centered cubic crystals show strong strengthening effects, even at high initial dislocation densities. We use large-scale 3-D discrete dislocation simulations (DDS) to explicitly model the deformation behavior of FCC Ni microcrystals in the size range 0.5 to 20 microns. The study shows that two size-sensitive thermal hardening processes, beyond forest hardening, are sufficient to develop the dimensional scaling of the flow...
Topics: DTIC Archive, Rao, S I, UES INC DAYTON OH, *CRYSTALS, *SIMULATION, *DISLOCATIONS, *THREE...
The synthesis of the final target probe compound has been accomplished on a scale that should be large enough for initial biological testing. While attempts to finalize an in vitro cell culture assay for enhancement of ultrasound images are still ongoing, we have been able to generate spheroids with our experimental cell lines, perfect our gel matrix for in vitro testing, and detect our cells in this system using a commercially available contrast agent, perfluoro-octyl bromine (PFOB) as a...
Topics: DTIC Archive, Erhardt, Paul W, TOLEDO UNIV OH, *DIAGNOSIS(MEDICINE), *ULTRASONICS, *BREAST CANCER,...
An ultrasonic modem is a device that can transmit information acoustically. One was designed for the 2008 FIRST Robotics League competition to provide short-range communications with the robot. The creation of this device was the result of a regulation that inhibited any use of electromagnetic-based communications technology in the competition. The ultrasonic modem consists of easily attainable and low-cost parts and was designed to attenuate ambient noise in the audible frequency domain and...
Topics: DTIC Archive, ARMY RESEARCH LAB CLEVELAND OH VEHICLE TECHNOLOGY DIRECTORATE, *MODEMS, *AUDIO...
The dependence of seismic source coupling of underground nuclear explosions on the characteristics of the Q explosion source medium is an important consideration in any assessment of nuclear test monitoring capability. In particular, while experience has indicated that normal depth explosions in almost all hardrock and water saturated emplacement media (i.e., good-coupling media) are roughly consistent with a single nib/yield relation for any fixed tectonic source region, explosions in dry,...
Topics: DTIC Archive, SCIENCE APPLICATIONS INTERNATIONAL CORP SAN DIEGO CA, *NUCLEAR EXPLOSION TESTING,...
A group within the Applied Physics Laboratory of the University of Washington (APL-UW) dedicated to the use of autonomous underwater vehicles in support of Navy missions executed this program. The group generally uses the Seaglider, developed at APL-UW, and develops or adapts instruments and glider behavior to support specific mission requirements. This group is informally called the Applied Seaglider Group, whose acronym (ASG) is also used to describe the mission-adapted Seaglider itself. This...
Topics: DTIC Archive, WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB, *ACOUSTIC DETECTORS, *AQUATIC ANIMALS,...
Spectra are presented as computed from accelerograms recorded at Taft, California of the July 21, 1952 earthquake in the region of Arvin and Tehachapi, California. Graphs are included of the ground motion generated by the detonation of 370,000 lb of buried explosives as recorded at about 1000 ft from the detonation point. The maximum acceleration recorded on the floor of the subbasement of a steel-frame mill building was 8% of gravity. This motion excited the building into vibration which was...
Topics: DTIC Archive, Housner, G. W., CALIFORNIA INST OF TECH PASADENA EARTHQUAKE ENGINEERING RESEARCH LAB,...
The operational theory of vacuum-tube power amplifiers with complex load impedances is being studied. The theoretical analysis proposed earlier (Reports 1, 2, and 3) was checked experimentally with amplifiers operating in the steady state at low power levels. A description is given of tests made with the amplifier of a type XQHB sonar system. Agreement between experiment and the theory was fairly good. The difficulty of measurement with pulsed operation and the fact that the theoretical...
Topics: DTIC Archive, Cunningham, W. J., Skalnik, J. G., YALE UNIV NEW HAVEN CT DUNHAM LAB, *POWER...
Topics: DTIC Archive, HAMPTON, L. D., OFFICE OF NAVAL RESEARCH ARLINGTON VA, *EXPLOSIVES, *DETONATIONS,...
Topics: DTIC Archive, SHIPP, K. G., NAVAL ORDNANCE LAB WHITE OAK MD, *EXPLOSIVES, *NITROBENZENES,...
Topics: DTIC Archive, NEUF, D, AIRBORNE INSTRUMENTS LAB INC MINEOLA NY, *PARAMETRIC AMPLIFIERS, *VARIABLE...
The recrystallization of 3,3'-diamino-2,2',4,4', 6,6'- hexanitrobiphenyl, DIPAM, from a series of two-solvent systems was studied. Mixtures of tetrahydrofuran-toluene and tetrahydrofurancarbon tetrachloride gave the best results. Using standard, as well as special continuous extraction techniques, the bulk density of crystalline DIPAM may be controlled over a wide range from 0.26 g/ml to 0.77 g/ml.
Topics: DTIC Archive, Oesterling, R E, NAVAL ORDNANCE LAB WHITE OAK MD, *EXPLOSIVES, CONTROL, DENSITY,...
Topics: DTIC Archive, ADJUTANT GENERAL'S OFFICE (ARMY) WASHINGTON DC, *ARTILLERY, *COUNTERINSURGENCY, *ARMY...
The Second Edition of this annotated bibliography lists the contents of over 150 books in English on numerical analysis and related literature. It is meant for the general scientific computer user and not for the research numerical analyst; the descriptions and suggestions are given with this in mind. It is expected that the most useful section will be the 27-page index which tells in which books various topics may be found. There is also a section describing how to look up further information...
Topics: DTIC Archive, BOEING SCIENTIFIC RESEARCH LABS SEATTLE WA MATHEMATICS RESEARCH LAB, *NUMERICAL...
