This report describes several modification to the U.S. Coast Guard Vulnerability Model which have recently been incorporated. These modifications are in three areas: 1. Revisions of the plume and puff model for toxic damage assessment, to include remodeling of the plume model to reduce computer time and storage space, computing the dosage for the puff model by direct integration, and transferring dosage values computed in Phase I of the Vulnerability Model directly to Phase II. 2. Revision of...

Topics: DTIC Archive, Tsao, Chi K., ENVIRO CONTROL INC ROCKVILLE MD, *MODELS, *DAMAGE ASSESSMENT,...

This research investigated the effects on direct labor requirements by exogenous changes in production rate in the ARC 164 radio and the Computer Signal Data Converter avionics production programs. The standard learning curve model was modified by adding a production rate variable using test data from the F-4, F-102, and KC-135 programs. Within the modified model, the production rate showed a significant and inverse relationship to direct labor requirements. Moreover, this modified model was...

Topics: DTIC Archive, Stevens ,David Y, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF SYSTEMS...

A computer program called AFSIM has been developed to conduct numerical simulations of plasma interactions with a satellite, assuming the satellite to be represented by an infinitely long cylinder and treating the plasma as discrete particles. The system is assumed to be uniform along the axis of the satellite. A number of features of the actual satellite are incorporated into the model with as much flexibility as possible to accommodate a wide range of conditions. (Autor)

Topics: DTIC Archive, Mazzella,Andrew, RDP INC WALTHAM MASS, *SPACE CHARGE, *ARTIFICIAL SATELLITES,...

A new descent algorithm based on direction searches in the osculating plane as opposed to the negative gradient is described. The major practical difference between the implementation to this approach and quasi-Newton algorithms is the use of the Hessian in place of the inverse Hessian. Thus, the descent algorithm is most suitable for problems for which it is practical to recalculate the Hessian a number of times during the solution process. A number of comparative results with popular...

Topics: DTIC Archive, Jensen,Paul S, LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH...

Program flow charts for each Modular System Control Development Model (MSCDM) program is presented. Flow charts for all operating systems, application, diagnostic and utility programs are included in this single volume.

Topics: DTIC Archive, BURROUGHS CORP PAOLI PA FEDERAL AND SPECIAL SYSTEMS GROUP, *COMPUTER PROGRAMS,...

The psychological, analytic, and programmatic aspects for an integrated set of computer simulation subroutines are presented. The algorithms and modules were designed to add the realism of a human element to a MAIN network systems simulation model of the AN/UPD-X systems exploitation process. This process involves a multi-operator, multi-stage exploitation of targeting information gathered by an airborne side-looking reconnaissance aircraft. The design of generic modules was a primary goal. The...

Topics: DTIC Archive, Siegel,Arthur I, DAYTON UNIV OHIO, *COMPUTER PROGRAM DOCUMENTATION, *COMPUTERIZED...

The pressure amplitude and phase distribution along the interface between a tapered fluid layer and an underlying fast fluid bottom were investigated theoretically. Two computer models, both based on the method of images, were designed: WEDGE 1 assumes that the source is at a finite distance from the apex of the wedge, and WEDGE 2 assumes an infinite distance. The pressure amplitude along the interface rapidly falls off for distances closer to the apex than the distance at which adiabatic mode...

Topics: DTIC Archive, Coppens,Alan B, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *COMPUTERIZED SIMULATION,...

In many cases, a simulation study may be viewed as an experimental situation in which a number of factors (independent variables) are to be investigated. However, standard experimental design techniques often require more simulation runs than are available to the simulation user. In general, the primary problem of experimental design in simulation can be succinctly summarized as too many factors and too few runs. A discussion of this problem is presented in this report. Three possible two-stage...

Topics: DTIC Archive, Smith, Dennis E., DESMATICS INC STATE COLLEGE PA, *COMPUTERIZED SIMULATION,...

The work of many researchers has been combined to produce a simplified, analytical, computer code to address the shaped-charge problem. This code named BASC (BRL Analytical Shaped Charge) is programmed in the FORTRAN language. BASC utilizes a modified version of the metal acceleration model of M. Defourneaux of France to account for both the final liner velocity and its acceleration history. The BASC code accurately predicts jet-tip velocity and treats the buildup of the massive lead pellet,...

Topics: DTIC Archive, Harrison, John T, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD,...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

The governing partial differential equations and constitutive relations are presented for the two-phase, axisymmetric, turbulent flow in a gun tube with a rotating projectile. The formulation included the following constitutive models: Noble-Abel gas equation of state, molecular viscosity and thermal conductivity, turbulent viscosity and length scale, intergranular stress relation, interphase drag and heat transfer relations, and a burning rate correlation for solit phase combustion. The...

Topics: DTIC Archive, Gibeling, Howard J, SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT, *COMPUTERIZED...

During the past decade, several unsteady, two-phase flow interior ballistic models have been developed which include treatment of ignition and flamespread through the propellant bed. While all such models were originally formulated under the simplifying assumption of one-dimensional flow, efforts are now underway to provide multi-dimensional representations, as well as to improve the descriptions of constitutive physical process. One important step, however, along the road to a...

Topics: DTIC Archive, Minor, Thomas C, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *IGNITION,...

This report presents some comparisons of experimental data and computational simulations of the severe roll motion and capsizing of ships operating in following seas. Earlier reports have described experiments conducted using radio-controlled ship models in San Francisco Bay for the purpose of studying the phenomenon of ship capsizing and the initial development of a computer simulation of the same phenomenon. The present report describes experiments conducted in the towing tank using three...

Topics: DTIC Archive, Fallon,William J, CALIFORNIA UNIV BERKELEY DEPT OF NAVAL ARCHITECTURE, *ROLL, *SHIP...

This document is a manual for the application of the computerized Life Cycle Cost (LCC) Model designed for the Full-Scale Engineering Development (FSED) Phase of the SEEK TALK Program. FSED contractors will use the model to perform cost estimates, identify cost drivers and make trade and other cost-related analyses. The manual assists users in establishing input parameter values, making LCC calculations and utilizing results. It also describes how to prepare computer inputs, and run the model...

Topics: DTIC Archive, Cho,C C, MITRE CORP BEDFORD MA, *COMPUTERIZED SIMULATION, *LIFE CYCLE COSTS,...

We review the major phenomena of skilled typing and propose a model for the control of the hands and fingers during typing. The model is based upon an Activation-Trigger-Schema system in which a hierarchical structure of schemata directs the selection of the letters to be typed and, then, controls the hand and finger movements by a cooperative, relaxation algorithm. The interactions of the patterns of activation and inhibition among the schemata determine the temporal ordering for launching the...

Topics: DTIC Archive, Rumelhart,David E, CALIFORNIA UNIV SAN DIEGO LA JOLLA CENTER FOR HUMAN INFORMATION...

We review the major phenomena of skilled typing and propose a model for the control of the hands and fingers during typing. The model is based upon an Activation-Trigger-Schema system in which a hierarchical structure of schemata directs the selection of the letters to be typed and, then, controls the hand and finger movements by a cooperative, relaxation algorithm. The interactions of the patterns of activation and inhibition among the schemata determine the temporal ordering for launching the...

Topics: DTIC Archive, Rumelhart,David E, CALIFORNIA UNIV SAN DIEGO LA JOLLA CENTER FOR HUMAN INFORMATION...

We review the major phenomena of skilled typing and propose a model for the control of the hands and fingers during typing. The model is based upon an Activation-Trigger-Schema system in which a hierarchical structure of schemata directs the selection of the letters to be typed and, then, controls the hand and finger movements by a cooperative, relaxation algorithm. The interactions of the patterns of activation and inhibition among the schemata determine the temporal ordering for launching the...

Topics: DTIC Archive, Rumelhart,David E, CALIFORNIA UNIV SAN DIEGO LA JOLLA CENTER FOR HUMAN INFORMATION...

A non-real time FORTRAN program has been developed to provide a simple, standardized means of applying uniform tests to various HF modem signals. The program stresses the modem signal in the same manner as would be experienced by operation on fading channels with tonal interference. Provisions are made for inserting various transmission filters and for operational scenarios that stress the doppler acquisition and tracking capabilities of a modem. (Author)

Topics: DTIC Archive, Jewett,W M, NAVAL RESEARCH LAB WASHINGTON DC, *HIGH FREQUENCY, *TEST METHODS,...

Data from 3 years (1972-1974) of synoptic observations collected at seven German stations were used to determine multivariate autoregressive (MVAR) models to make short-term forecasts (3 to 12 hours) for six atmospheric variables (temperature, u-wind, v-wind, visibility, ceiling height, and height of first cloud layer). So that certain tactical constraints could be met, the order and number of predictor variables used by the MVAR models were limited. To emphasize the variance of low ceiling and...

Topics: DTIC Archive, Goerss,James S, ATMOSPHERIC RESEARCH CORP NORMAN OK, *METEOROLOGICAL DATA, COMPUTER...

Data from 3 years (1972-1974) of synoptic observations collected at seven German stations were used to determine multivariate autoregressive (MVAR) models to make short-term forecasts (3 to 12 hours) for six atmospheric variables (temperature, u-wind, v-wind, visibility, ceiling height, and height of first cloud layer). So that certain tactical constraints could be met, the order and number of predictor variables used by the MVAR models were limited. To emphasize the variance of low ceiling and...

Topics: DTIC Archive, Goerss,James S, ATMOSPHERIC RESEARCH CORP NORMAN OK, *METEOROLOGICAL DATA, COMPUTER...

The number of test samples used to characterize the fatigue constants needed for failure predictions for ceramic materials determines the confidence in these predictions. The statistical reproducibility of the dynamic and static fatigue experiments used to measure the fatigue constants was analyzed using both statistical theory and a Monte Carlo computer simulation technique. It was found that the statistical reproducibility depended not only on the number of test samples but also on the other...

Topics: DTIC Archive, Ritter,John E , Jr, MASSACHUSETTS UNIV AMHERST DEPT OF MECHANICAL ENGINEERING, *GLASS...

The number of test samples used to characterize the fatigue constants needed for failure predictions for ceramic materials determines the confidence in these predictions. The statistical reproducibility of the dynamic and static fatigue experiments used to measure the fatigue constants was analyzed using both statistical theory and a Monte Carlo computer simulation technique. It was found that the statistical reproducibility depended not only on the number of test samples but also on the other...

Topics: DTIC Archive, Ritter,John E , Jr, MASSACHUSETTS UNIV AMHERST DEPT OF MECHANICAL ENGINEERING, *GLASS...

This report presents a rigid body analysis of the dynamics of a shipboard antenna in a three-axis gimbal configuration utilizing Direct Mechanical Stabilization (DMS) for primary control. System parameters are defined and Euler equations applied to obtain a non-linear system model that includes expected torque inputs. A computer simulation is generated with ship input motions due to roll, pitch, turn and flexure and a numerical integration procedure is then employed to determine the motion of...

Topics: DTIC Archive, Taylor, Marvin, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *SHIP ANTENNAS,...

A system has been developed for rating the corrosivity of aircraft operational environments. This system takes account of weather, atmospheric pollutant, and geographical factors to compute a severity index for three aspects of corrosion maintenance: aircraft washing, repainting, and repair needs. Computed ratings are in good agreement with aircraft corrosion experience and atmospheric testing programs at several locations.

Topics: DTIC Archive, Summitt, Robert, MICHIGAN STATE UNIV EAST LANSING DIV OF ENGINEERING RESEARCH,...

The primary task of this project was to demonstrate the application of advanced decision-analytic technology to the problems of an operational military staff, in this case the Rapid Deployment Joint Task Force (RDJTF) staff. A secondary task was to determine the usefulness of advanced decision- analytic products to the RDJTF staff, and transfer, if possible, a decision- analytic capability for a specific problem to them. As a result of discussions with RDJTF personnel, Decisions and Designs,...

Topics: DTIC Archive, Pirie, Jr , Robert B, DECISIONS AND DESIGNS INC MCLEAN VA, *DECISION MAKING,...

A method is developed for calculating fallout deposition down-wind from a massive nuclear attack on a small target area over a short time span. This is accomplished using existing smear codes and replacing their existing horizontal activity distribution with an approximating function. This function is the difference between two cumulative normal functions which are shown to result from superposition of individual bursts. A comparison is made between the contours predicted by this new code and...

Topics: DTIC Archive, Crandley,John F , Jr, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

If X sub 1, X sub 2 ..., X sub n are independent, identically- distributed random variables, then Y sub 1 Y sub 2 ... Y sub n, where the Y sub 1's are the X sub 1's rearranged in order of increasing magnitudes, are defined to be the order statistics corresponding to the original random sample. Order statistics have been applied to the solution of a problem involving the determination of time windows for firing impulses in a fuzing system. A computer program has been written which provides the...

Topics: DTIC Archive, Baker, William E, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD,...

While good gate level and register transfer level digital simulators exist, one can not easily integrate the two due to their inherent limitations. A given simulation can not be described partially in gate level and partially in a higher level. A solution is to create a functional level preprocessor and a library of functional device models linked to a gate level simulator's input language. This permits the mixing of behavioral models with gate level models in the same system structure. The...

Topics: DTIC Archive, Raeth,Peter G, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING,...

A comprehensive comparison of the most efficient Discrete Fourier Transform (DFT) techniques is presented. The DFT algorithms selected are the fixed radix Fast Fourier Transform (FFT), mixed radix FET, the Winograd Fourier Transform Algorithm (WFTA), and the Prime Factor Algorithm (PFA). Comparison of the algorithms is based on the number of real multiplications, additions, and memory arrays required as a function of sequence length N. This paper reviews the literature, selects the most...

Topics: DTIC Archive, Blanken,John David, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

The AUTODIN II computer communications network is expected to provide for present and future Department of Defense communications requirements. The proposed AUTODIN II network configuration is designed to provide reliable communications and minimal time delay for both interactive and timesharing and transaction-oriented systems. As development towards an operational network proceeds, questions concerning efficiency and optimality of the network are asked by both the design managers and future...

Topics: DTIC Archive, Healy, James W, AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH SCHOOL OF...

The AUTODIN II computer communications network is expected to provide for present and future Department of Defense communications requirements. The proposed AUTODIN II network configuration is designed to provide reliable communications and minimal time delay for both interactive and timesharing and transaction-oriented systems. As development towards an operational network proceeds, questions concerning efficiency and optimality of the network are asked by both the design managers and future...

Topics: DTIC Archive, Healy, James W, AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH SCHOOL OF...

This report considers an array of simultaneous underwater nuclear explosions generating plane tidal waves on the continental shelf. Computer simulations are used to study this wave generation process. They are based on non-linear shallow water theory with an initial condition of a stationary raised cone of water. The sensitivity of the wave height to different yields, combination of different yields, spacing, alignment, timing, and bottom slope is determined. The reference values used for this...

Topics: DTIC Archive, Weber,Henry James, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

Two analyses ae presented, which involve estimation of constant phase from single detector and detector array measurements. The single detector analysis is carried out in a discrete mode to obtain algorithms based on photon counting. The method used follows the Maximum A Posteriori and Maximum Likelihood estimation theories. Both white Gaussian noise and Poisson Shot noise limited conditions are considered. Simulation results show that signal-to-noise ratios of 17 dB or better are needed to...

Topics: DTIC Archive, Rojas,Fernando Pinzon, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

In this paper, a new algorithm is developed to calculate the output 'sensitivity matrix' of a linear, time-invariant, single-input single-output control system with piecewise constant input and output measurements taken at constant time intervals. The algorithm incorporates the singular value decomposition to investigate parameter identifiability and estimation accuracy in relation to the system as a whole and in relation to the model of the system. As a result, a structural condition on...

Topics: DTIC Archive, Palmer,Linda Kneen, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

Numerical solutions of the Navier-Stokes equations are obtained for a supersonic coflowing axisymmetric nozzle (Infinity) = 2,200,000. Five jet pressure ratio conditions ranging from a highly overexpanded case which exhibits a Mach disc shock formation to a slightly underexpanded case are examined and solved numerically. MacCormack's explicit method is applied as the numerical algorithm. An adaptive grid is utilized in the nozzle wake to allow the fine mesh region of the computational grid to...

Topics: DTIC Archive, Hasen,Gerald Alan, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

Numerical solutions of the Navier-Stokes equations are obtained for a supersonic coflowing axisymmetric nozzle (Infinity) = 2,200,000. Five jet pressure ratio conditions ranging from a highly overexpanded case which exhibits a Mach disc shock formation to a slightly underexpanded case are examined and solved numerically. MacCormack's explicit method is applied as the numerical algorithm. An adaptive grid is utilized in the nozzle wake to allow the fine mesh region of the computational grid to...

Topics: DTIC Archive, Hasen,Gerald Alan, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

The method of weighted residuals applied on the whole domain for steady state and transient heat generation problems was compared to finite difference methods. The comparison consisted of the maximum absolute error from the exact solution and computer time required for solution. One steady state and one transient heat generation problem were solved by collocation and Galerkin weighted residual methods and finite differences. The least squares weighted residual method was also used for the...

Topics: DTIC Archive, Naegeli,Robert Earl, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF...

This study uses a computer simulation of a strapdown laser gyro inertial reference system to analyze the errors generated as a result of highly dynamic flight profiles. A stochastic error model using state-of-the-art inertial sensors is developed in detail and implemented in software. SOFE, a generalized simulation program, was used to implement both a Monte Carlo simulation and a covariance analysis. The Monte Carlo method was selected to perform the error analysis. Two highly dynamic flight...

Topics: DTIC Archive, Ryan, John E, AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING,...

This study uses a computer simulation of a strapdown laser gyro inertial reference system to analyze the errors generated as a result of highly dynamic flight profiles. A stochastic error model using state-of-the-art inertial sensors is developed in detail and implemented in software. SOFE, a generalized simulation program, was used to implement both a Monte Carlo simulation and a covariance analysis. The Monte Carlo method was selected to perform the error analysis. Two highly dynamic flight...

Topics: DTIC Archive, Ryan, John E, AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING,...

This report describes NAVMAP, a generalized computer simulation language for naval systems modeling. NAVMAP is designed to be highly flexible, compact and portable. It is a FORTRAN-based language for discrete-event, continuous and state-event modeling. It is designed to easily interface with FORTRAN-based software for statistical methodology and optimization. NAVMAP (Naval Modeling and Analysis Program) is intended to serve as the basis for a consistent simulation modeling approach among naval...

Topics: DTIC Archive, Biles,William E, PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF INDUSTRIAL AND...

This report describes NAVMAP, a generalized computer simulation language for naval systems modeling. NAVMAP is designed to be highly flexible, compact and portable. It is a FORTRAN-based language for discrete-event, continuous and state-event modeling. It is designed to easily interface with FORTRAN-based software for statistical methodology and optimization. NAVMAP (Naval Modeling and Analysis Program) is intended to serve as the basis for a consistent simulation modeling approach among naval...

Topics: DTIC Archive, Biles,William E, PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF INDUSTRIAL AND...

Experimental research has been conducted to examine the combined effects of free-stream turbulence and favorable pressure gradients on flat-wall transitional boundary layers. Convective heat transfer coefficients, boundary layer mean velocity and temperature profile data, and wall static pressure distribution data were obtained for four combinations of free-stream turbulence intensity and favorable pressure gradient. Free-stream multi-component turbulence intensity, longitudinal integral scale,...

Topics: DTIC Archive, Blair,M F, UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CONN, *COMPUTERIZED...

Experimental research has been conducted to examine the combined effects of free-stream turbulence and favorable pressure gradients on flat-wall transitional boundary layers. Convective heat transfer coefficients, boundary layer mean velocity and temperature profile data, and wall static pressure distribution data were obtained for four combinations of free-stream turbulence intensity and favorable pressure gradient. Free-stream multi-component turbulence intensity, longitudinal integral scale,...

Topics: DTIC Archive, Blair,M F, UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CONN, *COMPUTERIZED...

A review of the TACWAR theater-level combat simulation model has been completed as an initial prerequisite to the primary objective of augmenting TACWAR to include Command, Control, and Communications Degradation considerations. This review has revealed a number of logic and programming bugs in the model that could also have remained undetected in other versions of the model throughout the TACWAR community of interest. It is the intent of the author to help the community eliminate these...

Topics: DTIC Archive, Ingram, John C, HARRY DIAMOND LABS ADELPHI MD, *COMPUTERIZED SIMULATION, *WAR GAMES,...

A review of the TACWAR theater-level combat simulation model has been completed as an initial prerequisite to the primary objective of augmenting TACWAR to include Command, Control, and Communications Degradation considerations. This review has revealed a number of logic and programming bugs in the model that could also have remained undetected in other versions of the model throughout the TACWAR community of interest. It is the intent of the author to help the community eliminate these...

Topics: DTIC Archive, Ingram, John C, HARRY DIAMOND LABS ADELPHI MD, *COMPUTERIZED SIMULATION, *WAR GAMES,...

There is currently no value of survivability attributed to an aircraft's reactive maneuver capability. In this experiment, exposure to enemy ground threats for various levels of information feedback to the aircrew were compared. This was done in an attempt to isolate the maneuverability factor. The Threat Model Penetration Simulation Analysis (TMPSA) model produced by the University of Dayton Research Institute was the penetration model used. The conclusion of this experiment was that only...

Topics: DTIC Archive, Alt,John J, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING,...

This thesis investigates MX survivability when a terminal ballistic missile defense system known as Low Altitude Defense (LOAD) is deployed. LOAD will defend the MX missile with three high-speed, nuclear armed interceptor missiles. This research determines a best strategy for the use of the interceptors. The deployment of LOAD with its best strategy is compared to increases in MX shelter hardness to determine which is the more effective method of improving MX survivability.

Topics: DTIC Archive, Moore, James T, AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING,...

The LANTIRN system provides the fighter pilot with a forward looking infrared (FLIR) system, which allows him to fly the aircraft lower and faster than he would otherwise be able to fly. The objective of this research effort was to determine whether this increased capability will significantly improve the fighter's survivability in the night interdiction role. The problem was studied in the context of the threats and terrain found in the central region of West Germany. A model of the terrain...

Topics: DTIC Archive, Leek,Warren J, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING,...

Conservative logic is a comprehensive model of computation which explicitly reflects a number of fundamental principles of physics, such as the reversibility of the dynamical laws and the conservation of certain additive quantities (among which energy plays a distinguished role). Because it more closely mirrors physics than traditional models of computation, conservative logic is in a better position to provide indications concerning the realization of high-performance computing systems, i.e.,...

Topics: DTIC Archive, Fredkin,Edward, MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR COMPUTER SCIENCE,...

This report presents the results of the experimental investigation of the effect of small, symmetric jet injection from the nose of a slender body on the lateral forces and moments at high incidence. The investigation includes the effects of Mach and Reynolds numbers rate of injection and the position of injection. It is demonstrated that at low speeds of jet blowing even small rates are a very useful means of side-force and yawing moment alleviation and even control, influencing both...

Topics: DTIC Archive, Rom,J, TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF AERONAUTICAL ENGINEERING,...