| Decisive Routing and Admission Control According to Quality of Service Constraints |
Mar-2009 |
110 pages |
| Authors:
Cindy C Reese; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | This thesis will research, model, and propose options to enhance command and control in for communication networks. My goal is to research the viability of combing past research in the areas of network prediction, context-aware routing, and QoSbased routing optimization in order to create an intelligent routing protocol platform for mobile networks. It will consolidate efforts from an Intelligent Agent Based Framework to Maximize Information Utility by Captain John Pecarina, ... |
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| Using Multiple Robust Parameter Design Techniques to Improve Hyperspectral Anomaly Detection Algorithm Performance |
Mar-2009 |
157 pages |
| Authors:
Matthew Davis; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Detecting and identifying objects of interest is the goal of all remote sensing. New advances, specifically in hyperspectral imaging technology have provided the analyst with immense amounts of data requiring evaluation. Several filtering techniques or anomaly detection algorithms have been proposed. However, most new algorithms are insufficiently verified to be robust to the broad range of hyperspectral data being made available. One such algorithm, AutoGAD, is tested here via two ... |
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| Determining the Orbit Locations of Turkish Airborne Early Warning and Control Aircraft Over the Turkish Air Space |
Mar-2009 |
167 pages |
| Authors:
Nebi Sarikaya; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research provides optimal orbit locations that can be updated according to the threats, for Turkish AEW&C aircraft in the combat arena. Three combat scenarios Turkey might encounter are examined. Turkey can expect threats from everywhere. The worst cases for these scenarios include bad weather conditions and in Electronic Counter Measure (ECM) environment, adversary Surface to Air Missile (SAM) sites which are located in areas unknown to Turkish intelligence and ... |
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| Proof-of-Concept Studies in Novel Guided Wave Methods for Metallic Structural Condition |
Mar-2009 |
40 pages |
| Authors:
Michael Lanza di Todd; Francesco Scalea; CALIFORNIA UNIV SAN DIEGO LA JOLLA
|
| Active sensing in structural health monitoring (SHM) refers to injecting (user-defined) energy into the system in order to actively probe its response to the induced dynamics as a means of detecting whether damage may be present in the system. A number of researchers have shown that active sensing with guided ultrasonic waves (GUWs) can be a powerful approach to take, as GUWs, when launched and detected in conjunction with macro-fiber ... |
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| Adaptive Selections of Sample Size and Solver Iterations in Stochastic Optimization with Application to Nonlinear Commodity Flow Problems |
Mar-2009 |
57 pages |
| Authors:
David A Vondrak; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| We present an algorithm to approximately solve certain stochastic nonlinear programs through sample average approximations. The sample sizes in these approximations are selected by approximately solving optimal control problems defined on a discrete-time dynamic system. The optimal-control problem seeks to minimize the computational effort required to reach a near-optimal objective value of the stochastic nonlinear program. Unknown control-problem parameters such as rate of convergence, computational effort per solver iteration, and ... |
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| Navy Officer Manpower Optimization Incorporating Budgetary Constraints |
Mar-2009 |
89 pages |
| Authors:
David T Clark; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Every two years, the Chief of Naval Operations is responsible for submitting the Program Objectives Memorandum to the Secretary of the Navy for further review and inclusion in the President's two-year budget input to Congress. The Chief of Naval Personnel's Strategic Resourcing Branch is challenged with building a manpower budget program that both meets the budget limitations set forth by Congress and the manning requirement choices made by Navy leadership. ... |
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| Multiobjective Optimal Control Methodology for the Analysis of Certain Sociodynamic Problems |
Mar-2009 |
155 pages |
| Authors:
Gloria L Porter; NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MATHEMATICS
|
| Social networks involve studying how relations form between individuals in a group based on their shared preferences and attributes. In this work, social force theory is used to model social interaction and long-term network dynamics while multiobjective optimal control theory provides a basis for predicting network structural formation. Using computer simulations, the author numerically analyzes the evolution and long-term behavior of optimal network structures based on the demographics of a ... |
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| Near Real-Time Closed-Loop Optimal Control Feedback for Spacecraft Attitude Maneuvers |
Mar-2009 |
149 pages |
| Authors:
C D McFarland; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Optimization of spacecraft attitude maneuvers can significantly reduce attitude control system size and mass, and extend satellite end-of-life. Optimal control theory has been applied to solve a variety of open-loop optimal control problems for terrestrial, air, and space applications. However, general application of real-time optimal controllers on spacecraft for large slew maneuvers has been limited because open-loop control systems are inherently vulnerable to error and the computation necessary to solve ... |
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| Ohio River Denial as a Transportation Corridor and Its Economic Impacts on the Energy Industry |
Mar-2009 |
|
| Authors:
Caglar Utku Guler; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | What if the Ohio River is disrupted or denied partially or completely as a transportation corridor? A disruption may be either a natural or man-made disaster or a planned outage on the river's lock and dam structures. Recent history is full of water transport disruption events having significant economic effects on the waterside industries. To assess coal-based economic impacts, we developed a network flow model to represent waterside coal-fired power ... |
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| Infrared Spectroscopic Imaging for Prostate Pathology Practice |
Mar-2009 |
57 pages |
| Authors:
Rohit Bhargava; ILLINOIS UNIV CHAMPAIGN
|
| The report summarizes progress towards using Fourier transform infrared spectroscopic imaging for prostate pathology in year 2 of a 3 year award from the PCRP. The aim of the work is to enable histopathologic recognition without the use of human input or stains. The major accomplishments in the past year are: 1) A genetic algorithm based method to distinguish benign from malignant epithelium using infrared spectroscopic imaging data was shown ... |
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| Optimization of the Temporal Pattern of Applied Radiation Dose: Implication for the Treatment of Prostate Cancer |
Mar-2009 |
28 pages |
| Authors:
Michael Altman; CHICAGO UNIV IL
|
| Our previous modeling study demonstrated that the temporal pattern of applied dose during a single fraction of radiation can impact cell survival, especially in situations with low a/b and large dose/fx and fraction length (Tf). Two different arrangements of the same set of radiation fields were applied to low and high a/b cell lines at a high dose/fx and long Tf; a low a/b line was subjected to the same ... |
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| Developing a Tool for the Location Optimization of the Alert Aircraft with Changing Threat Anticipation |
Mar-2009 |
122 pages |
| Authors:
Okan Arslan; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The threat to the airspace is posed by the outside world in conventional terms as well as hostilities from within the airspace such as hijacked aircraft. Alert aircraft are located with the sole responsibility of responding to any incident. Different regions of the airspace may have different alert states depending on current intelligence input. Due to non-constant states of threat level, the Turkish Air Force must deploy aircraft to cover ... |
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| Electroactive Reactive Oligomers and Polymers as Device Components |
03-Feb-2009 |
37 pages |
| Authors:
John R Reynolds; FLORIDA UNIV GAINESVILLE DEPT OF CHEMISTRY
|
| The development of conjugated. conducting and electroactive oligomers, polymers and multi-component materials is proposed for application to photovoltaic, organic electronic and other devices of interest to the Air Force. We will design, synthesize, and characterize oligomers and polymers having a large enhancement of a property or a high degree of tunability of the property via repeat unit, macromolecular and morphological structures. Proto-type devices will be studied as a means of ... |
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| In-Fiber Magneto-Optic Devices Based on Ultrahigh Verdet Constant Organic Materials and Holey Fibers |
02-Feb-2009 |
30 pages |
| Authors:
Nasser Peyghambarian; Andre Persoons; Robert A Norwood; ARIZONA UNIV BOARD OF REGENTS TUCSON
|
| A high sensitivity Verdet constant measurement system was developed that obtained Verdet constants for commercially available standards in excellent agreement with the literature. We have observed Verdet constants of approximately 100,000 degrees/T-m in regioregular polythiophenes and shown that the regioregularity and processing conditions critically effect their properties. New magnetite nanoparticle/acrylate polymer core/shell nanocomposites with exceptional transparency across the visible/IR have been developed. These composites exhibit Verdet constants 100,000 degrees/T-m in ... |
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| Supermultiplicative Speedups of Probabilistic Model-Building Genetic Algorithms |
Feb-2009 |
21 pages |
| Authors:
David E Goldberg; Kumara Sastry; Martin Pelikan; ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF INDUSTRIAL AND ENTERPRISE SYSTEMS ENGINEERING
|
| Substantial progress was achieved for all objectives stated in this proposal. Several effective efficiency enhancement techniques were proposed from specialized model-directed hybrids to methods capable of learning from prior runs on similar problems. Substantial speedups of an order of magnitude or more were obtained with several of these techniques on difficult classes of problems and evidence was provided of supermultiplicative speedups resulting from a combination of multiple efficiency enhancements. Theoretical ... |
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| Nonlinear Structures Optimization for Flexible Flapping Wing MAVs |
Feb-2009 |
19 pages |
| Authors:
Robert L Jr; Walker; Craig E Svanberg; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| This report documents the culmination of in-house and AFIT collaboration in the area of nonlinear structures optimization for flexible flapping wing MAVs. The work was divided into four different tasks, including: Preliminary design of flapping wing device, Couple Abaqus with aerodynamic model, Comparison of experimental and computational results, and Evaluate CSIRF progress for transition to FY09 6.2 program. Technology developed in this task is being transitioned in the VAES program ... |
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| Simultaneous Planning and Control for Autonomous Ground Vehicles |
Feb-2009 |
160 pages |
| Authors:
Thomas C Galluzzo; FLORIDA UNIV GAINESVILLE MECHANICAL AND AEROSPACE ENGINEERING
|
| Motion planning and control for autonomous vehicles are complex tasks that must be done in order for a ground robot to operate in a cluttered environment. This dissertation presents the theory, implementation, and test results for some new and novel Receding Horizon Control (RHC) techniques that allow these tasks to be unified into one. The first new method is called Heuristic Receding Horizon Control (HRHC), and uses a modified A* ... |
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| Ethyl Pyruvate Provides Therapeutic Benefits to Resuscitation Fluids |
Feb-2009 |
16 pages |
| Authors:
Luis Ulloa; UNIVERSITY OF MEDICINE AND DENTISTRY OF NEW JERSEY NEWARK
|
| Many promising strategies in experimental models of hemorrhage have failed in clinical trials, in part because classical experimental models may not mimic clinical settings. Unlike classical experimental models, hemorrhage in critical care is normally associated with collateral trauma that affects the physiological responses during resuscitation. Unlike rodents, swine are an optimal species donor for experimental hemorrhage as they have an anatomy, physiology and hemodynamic responses that closely resembles human. Here, ... |
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| Performance Optimization of Complex Systems |
Feb-2009 |
10 pages |
| Authors:
Christos G Cassandras; BOSTON UNIV MA
|
| The research results in this report are based on an effort to develop systematic techniques for performance optimization of complex systems with special emphasis on real-time methods. Recognizing the increasing importance of stochastic networks in both the civilian and military domains, explicit algorithms are sought that are scalable, distributed, asynchronous, and computationally compatible with the limited processing capabilities at individual nodes of many such networks. The main outcomes of the ... |
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| Distributed Spectrum Sensing and Access in Cognitive Radio Networks With Energy Constraint |
Feb 2009 |
16 pages |
| Authors:
Yunxia Chen; Qing Zhao; Ananthram Swami; CALIFORNIA UNIV DAVIS DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We design distributed spectrum sensing and access strategies for opportunistic spectrum access (OSA) under an energy constraint on secondary users. Both the continuous and the bursty traffic models are considered for different applications of the secondary network. In each slot, a secondary user sequentially decides whether to sense, where in the spectrum to sense, and whether to access. By casting this sequential decision-making problem in the framework of partially observable ... |
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| Liquid Metal Anode for JP-8 Fuel Cell |
15-Jan-2009 |
63 pages |
| Authors:
Thomas Tao; Ralph White; Stephen Klotz; CELLTECH POWER LLC WESTBOROUGH MA
|
| Report developed under STTR contract W911NF-08-C-0075 for topic A08-T007. JP-8 is a high-energy density liquid fuel available to the soldier, but its electrochemical oxidation in a fuel cell is problematic. The purpose of this effort is to advance the development of a liquid metal based fuel cell operating directly on JP-8 for application in a field portable battery charger. During Phase 1 an evaluation was performed of a range of ... |
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| New Algorithms for Collaborative and Adversarial Decision Making in Partially Observable Stochastic Games |
14-Jan-2009 |
11 pages |
| Authors:
Shlomo Zilberstein; MASSACHUSETTS UNIV AMHERST
|
| The project has produced new computational models and algorithms for coordination, prediction and planning in situations involving multiple decision makers that operate over an extended period of time in either collaborative or adversarial domains. This includes the development of the decentralized partially-observable Markov decision process (DEC-POMDP) model, memory-bounded algorithm for solving finite-horizon DEC-POMDPs, sparse representations of agent strategies using finite-state controllers, bounded policy iteration algorithms for infinite-horizon DEC-POMDPs, and algorithms ... |
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| Terahertz Spectroscopy of Intrinsic Biomarkers for Non-Melanoma Skin Cancer |
Jan-2009 |
11 pages |
| Authors:
Cecil S Joseph; Robert H Giles; Elizabeth J Ehasz; Thomas M Horgan; Christoher M Forgione; Brian W Soper; Andrew J Gatesman; Jason C Dickinson; Thomas M Goyette; Munir Al-Arashi; Anna N Yaroslavsky; William E Nixon; MASSACHUSETTS UNIV LOWELL SUBMILLIMETER-WAVE TECH LAB
|
| Continuous wave terahertz imaging has the potential to offer a safe, non-invasive medical imaging modality for detecting different types of human cancers. The aim of this study was to identify intrinsic biomarkers for non-melanoma skin cancer and their absorption frequencies. Knowledge of these frequencies is a prerequisite for the optimal development of a continuous wave terahertz imaging system for detecting different types of skin cancers. The absorption characteristics of skin ... |
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| Propulsion and Power Rapid Response Research and Development Support: Fundamental Science Investigations for Propulsion and Power Systems |
Jan-2009 |
236 pages |
| Authors:
Donald B Hanson; UNIVERSAL TECHNOLOGY CORP DAYTON OH
|
| Research was conducted for the Propulsion Directorate's research and development efforts in core technology areas for turbine engines, hypersonics, and aerospace power. Experimental and theoretical research was conducted in the technical disciplines of fuels and combustion; mechanical subsystems and life management; aerodynamics; aerospace power systems including applied and high temperature superconductivity, physics of electrical discharges, applied atomic and molecular spectroscopy, thermophysics and high temperature dielectric materials, thermal nanofluids for heat ... |
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| A Diagnostic Approach to Weapon System Lifecycle Support: The Phalanx Close-in Weapon System |
Jan-2009 |
17 pages |
| Authors:
Aruna Apte; Rene Rendon; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This study discusses a diagnostic approach to examining the lifecycle support system of a weapon system specifically illustrating the approaches for the US Navy Phalanx Close-in Weapon System (CIWS). The study gauges the status of current readiness and analyzes a snapshot of cost structures. The study identifies the program's influential cost factors and system performance drivers. As a diagnostic approach to the lifecycle support of the Phalanx Weapon System, the ... |
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| Variable Swing Optimal Parallel Links - Minimal Power, Maximal Density for Parallel Links |
Jan-2009 |
120 pages |
| Authors:
Claudia P Gonzalez; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The rapid growth of chip-to-chip interconnect density, speed, and the demand for smaller and more portable devices has taken signal integrity engineers to the limits of PCB (Printed Circuit Board) design. Special care has to be taken in the design stage to guarantee that noise specifications are met and power specifications and geometry of the links ensure minimal crosstalk noise in the system. In parallel links, specific parameters of layout ... |
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| Flip Chip Bonding of 68 x 68 MWIR LED Arrays |
Jan-2009 |
6 pages |
| Authors:
Naresh C Das; Monica Taysing-Lara; Kimberley A Olver; Fouad Kiamilev; J P Prineas; J T Olesberg; E J Koerperick; L M Murray; Tom F Boggess; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| The flip chip bonding process is optimized by varying the bonding pressure, temperature, and time. The 68 68 mid wave infrared (MWIR) LED array was hybridized onto Si-CMOS driver array with same number of pixels. Each pixel has two indium bumps, one for cathode and another for anode. Both LED array and CMOS drivers have 15- m-square Indium bump contact pads. We used Karl Suss FC150 flip chip machine for ... |
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| Optimizing Assignment of Tomahawk Cruise Missile Missions to Firing Units |
Jan 2009 |
16 pages |
| Authors:
ALexandra M Newman; Richard E Rosenthal; Javier Salmeron; Gerald G Brown; Wilson Price; Anton Rowe; Charles F Fennemore; Robert L Taft; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH
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| The Tomahawk land-attack cruise missile can be launched from a ship or submarine, and can deliver its warhead precisely to a target at long range. There are several variants of the Tomahawk missile, each with specialized capabilities. For each Tomahawk Missile Sequence Number (MSN) task (i.e., mission), the Tomahawk missile variants can be ranked with respect to their ability and cost effectiveness to perform that task. A given land attack ... |
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| Autonomous Motion Planning Using a Predictive Temporal Method |
2009 |
171 pages |
| Authors:
Jr Thorn Eric L.; FLORIDA UNIV GAINESVILLE CENTER FOR INTELLIGENT MACHINES AND ROBOTICS
|
| The introduction of moving obstacles into a robot's environment presents added complexity to the motion planning task. This dissertation examines the need for and development of a representation which incorporates the dynamic nature of the environment and presents a novel motion planning method which utilizes this representation to facilitate the generation of optimal trajectories among moving obstacles, termed the predictive temporal motion planning (PTMP) method. This new method provides an ... |
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| A Quaternary Decision Diagram Machine and the Optimization of Its Code |
2009 |
|
| Authors:
Tsutomu Sasao; Hiroki Nakahara; Munehiro Matsuura; Yoshifumi Kawamura; Jon T. Butler; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We show the advantage of Quarternary Decision Diagrams (QDDs) in representing and evaluating logic functions. That is, we show how QDDs are used to implement QDD machines, which yield high-speed implementations. We compare QDD machines with binary decision diagram (BDD) machines, and show a speed improvement of 1.28- 2.02 times when QDDs are chosen. We consider 1-and 2- address BDD machines, and 3- and 4-address QDD machines, and we show ... |
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| Computational Fluid Dynamics Studies of a Flapping Wing Nano Air Vehicle (NAV) |
31-Dec-2008 |
51 pages |
| Authors:
Ravi Ramamurti; William C Sandberg; Jason Geder; NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR REACTIVE FLOW AND DYNAMICAL SYSTEMS
|
| The goal of this project is to develop a Nano Air Vehicle (NAV) with a wing span of 7.5 cm. The computational fluid dynamics study is focused on the aerodynamic efficiency of the wings. The primary focus of the computational study is on the aerodynamic performance of the wings in order to obtain a near optimal kinematics of the wing while the NAV is in a hover mode. The secondary ... |
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| Carbon Nanotube Array for Infrared Detection |
05-Dec-2008 |
17 pages |
| Authors:
Jimmy Xu; BROWN UNIV PROVIDENCE RI DIV OF ENGINEERING
|
| We explore the basic science issues and device potential of our carbon nanotube-silicon (CNT-Si) heterojunctions for infrared photodetection. We focus on the underlying mechanism of infrared photocurrent response, which is elucidated by a detailed study of the dependence of the photocurrent on modulation frequency and intensity of the incident infrared radiation. The photocurrent generation is ascribed to the formation of the CNT-Si heterojunction, rather than the thermal gradient in the ... |
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| Breaking Barriers to Design Dimensions in Nearly Orthogonal Latin Hypercubes |
Dec-2008 |
158 pages |
| Authors:
Alejandro S Hernandez; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A dynamic and extremely complex landscape in security and world events presents problems that challenge all sectors of society to develop efficient means for exploring a wide range of solutions. Similarly, exponential increases in technological capability make it difficult for commercial and governmental leaders to assess those proposed solutions. Computer experimentation is an established method for examining complex models with large numbers of factors. Orthogonal and nearly orthogonal Latin hypercubes ... |
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| Forecasting the Demand of the F414-GE-400 Engine at NAS Lemoore |
Dec-2008 |
85 pages |
| Authors:
J M Hersey; James M Rowlett; Shannon P Thompson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this research is to forecast the repair demand of the F414-GE-400 aircraft engine and determine if Fleet Readiness Center (FRC) West, located at Naval Air Station (NAS) Lemoore, will be able to meet increased demand in the near future. Our methodology was to collect current history of intermediate-level repair of the F414-GE-400 and estimate its increase based on the arrival of additional engines procured by the Navy. ... |
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| Efficient Employment of Adaptive Sensor |
Dec-2008 |
39 pages |
| Authors:
Lee K Kiang; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| We consider a sensor that is subject to false-positive and false-negative errors. The sensor searches for stationary threat objects such as ballistic missile launchers or improvised explosive devices. The objects are located in a certain area of interest, which is divided into area-cells. The area-cells are defined such that each one of them may contain, at most, one threat object. The task of the sensor is to determine if an ... |
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| Enhancing Combat Survivability of Existing Unmanned Aircraft Systems |
Dec-2008 |
149 pages |
| Authors:
Kine S Tham; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The importance of Unmanned Aircraft Systems (UAS) to warfighters has been growing. Each loss (regardless of whether the entire UAS or parts of it) has become more expensive and unaffordable in both an operational and monetary sense. An unmanned aircraft (UA) loss may mean that critical missions cannot be performed and millions of dollars of investments on the UA lost. As most existing UAS were designed to be inexpensive and ... |
|
| Proteomic Analysis of Prostate Cancer Field Effect |
Dec-2008 |
6 pages |
| Authors:
Michael J Wilson; MINNESOTA UNIV MINNEAPOLIS
|
| We have undertaken a proteomic approach to identify proteins altered in both cancer and benign cells near the cancers. This study takes advantage of the ?field effect? of the cancer, the malignancy associated changes in normal cells to discover cancer altered protein that could be more abundant in serum or urine since they would come from both benign and cancer cells. We have set optimal conditions for laser capture microdissection ... |
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| The SPRING Nanoenergetics Hub at UTD |
Dec-2008 |
99 pages |
| Authors:
John Ferraris; TEXAS UNIV AT DALLAS
|
| The objective of this proposed research, to be carried out as part of the Strategic Partnership for Research in Nanotechnology, or SPRING (in collaboration with AFRL/MLMT, Rice University, the University of Texas, Arlington and the University of Texas, Austin), is the synthesis and processing of advanced nanostructured materials, the structure and property characterization needed for materials optimization, the fabrication of sophisticated structures, and device testing in the areas of energy ... |
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| A Metadata Calculus for Securing Information Flows |
Dec-2008 |
8 pages |
| Authors:
Mudhakar Srivatsa; Dakshi Agrawal; Shane Balfe; IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY
|
| Traditional approaches to information sharing use a highly conservative approach to deduce the metadata for an output object x derived from input objects y(sub 1), y(sub 2), ... , y(sub n) [e.g.: maximum over the security labels of all input objects]. Such approaches does not account for functions that explicitly down- grade the value of an object. Consequently, the security labels in traditional approaches tend to monotonically increase as newer ... |
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| A Priori Design of Optimal Electro-Optic Materials for Laser Eye Protection |
Dec-2008 |
9 pages |
| Authors:
J Andzelm; M Davis; A Chafin; G Lindsay; Weitao Yang; D N Beratan; C Rinderspacher; T M Pritchett; J Dougherty; A Rawlett; P J Reynolds; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The task of protecting soldier eyesight and battlefield optical sensors from potentially damaging effects of high-intensity light has stimulated interest in electro-optic (EO) materials such as EO chromophores inserted into polymeric material. A priori design of optimal EO chromophores of Army relevance requires the capability to calculate accurately both the linear absorption properties (in effect, the color) and non-linear optical (NLO) properties of EO chromophores. Here we discuss two major ... |
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| Multi-Static Radar Signal Processing-Improved Interference Rejection, Tracking and Discrimination |
Dec-2008 |
11 pages |
| Authors:
Richard Schneible; Russell Brown; Michael Wicks; Yuhong Zhang; Robert McMillan; STIEFVATER CONSULTANTS MARCY NY
|
| In a multi-static radar (MSR) the transmit/receive aperture is divided into a number of sub-apertures that can be placed in various locations relative to each other. These locations can be chosen to optimize the performance of the radar in terms of some specific task. Two multi-static approaches have been investigated: 1. Closely spaced apertures distributed aperture radar (DAR) 2. Widely spaced apertures Realizing the greater capability of MSR's requires unique ... |
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| Optimization of Energy Consumptions in Sensor Networks |
Dec-2008 |
7 pages |
| Authors:
Hongbing Cheng; Yu-Dong Yao; Shafik Quoraishee; STEVENS INST OF TECH HOBOKEN NJ
|
| The purpose of this paper is to minimize the energy consumption for a single link communication in wireless sensor network. The quadrature amplitude modulation (QAM) and auto repeat request (ARQ) with finite retry limit and various packet size are considered in the system model. We formulate the optimization problem to be a nonlinear integer programming with modulation order and packet size as variables. To solve this problem, the continuous relaxation ... |
|
| Development of a Tissue Engineered Scaffold for Meniscus Replacement |
Dec-2008 |
8 pages |
| Authors:
E A Balint; Gatt; C J Jr; M G Dunn; ROBERT WOOD JOHNSON UNIV HOSPITAL NEW BRUNSWICK NJ
|
| It is well accepted that the loss of meniscal function due to surgical removal is a significant factor in the onset of degenerative osteoarthritis of the knee. Few viable alternatives exist for the replacement of significantly damaged tissue. In this study, two potential designs for meniscus scaffolds were compared with a focus on the mechanical protection they provide the articular surfaces and their overall biological incorporation into synovial tissue. Three ... |
|
| Characterization of Perovskite Films Grown by a Novel Low-Temperature Process for Uncooled IR Detector Applications |
Dec-2008 |
8 pages |
| Authors:
W L Sarney; J W Little; A R Tao; D E Morse; F E Livingston; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| Many Army applications, such as driver vision enhancement (DVE), rifle sights, seekers, physical security, target acquisition, and fire control, would benefit from affordable, passive uncooled infrared (IR) sensor options. The main considerations for uncooled IR sensors are cost, weight, and power. We have begun a three-year effort to develop a novel approach to the fabrication of uncooled IR focal-plane array (FPA) detectors using bio-inspired, low-temperature, multimetallic perovskite nanoparticle deposition, direct-write ... |
|
| Advanced Algorithm for Optimal Sensor-Target and Weapon-Target Pairings in Dynamic Collaborative Engagement |
Dec-2008 |
9 pages |
| Authors:
Z R Bogdanowicz; N P Coleman; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ
|
| In this paper we introduce a new algorithm for assigning sensors and weapons to targets in the dynamic environment, where sensors, weapons, and targets are allowed to move freely (but predictably) over a certain region of a battlefield. In addition, we determine when such an assignment should be executed. This new algorithm for Sensors/Weapons And Targets pairings is named SWAT. In SWAT the optimization component Swt_opt is derived from the ... |
|
| Development of Indirect View Sensor Systems: Effects of Viewpoint Offset on Human Performance |
Dec-2008 |
8 pages |
| Authors:
Linda Mullins; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE
|
| Advances in sensor imaging technologies permit the Soldier to extend mission performance beyond daytime operations and into the night. Visual helmet-mounted displays (HMDs) have increasingly been used to provide supplemental information to the Soldier. When night vision sensors are used to present imagery on an HMD, the relation between the sensor and display results in a viewpoint offset, where the perceived location of objects in the environment is shifted or ... |
|
| Computational Design of Biomimetic Gels With Properties of Human Tissues |
Dec-2008 |
9 pages |
| Authors:
J Andzelm; Y Sliozberg; J K Brennan; M VanLandingham; V Pryamitsyn; V Ganesan; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The effective design of body armor requires the use of biomimicking materials that accurately and robustly reproduce the characteristic mechanical behavior of human tissues. The mechanical performance of the soft tissues is determined by their viscoelastic properties and for this reason the optimal soft tissue surrogate must viscoelastically mimic the original tissue. One traditional tissue surrogate material is a water-based gelatin gel that has poor environmental stability and limited tailorability. ... |
|
| Towards an Agent-Based, Autonomous Tactical System for C4ISR Operations |
Dec-2008 |
7 pages |
| Authors:
R J Keisler; SPACE AND NAVAL WARFARE SYSTEMS CENTER NORTH CHARLESTON SC
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| Software agent involvement in combat computer systems can provide lightweight, dynamic automation to the warfighter. Current intelligence systems are limited by the abilities of the warfighters to gather, assimilate, report, and execute on intelligence. Through the research and design for the Overshadow system, we found using agents practical for automation capabilities in tactical systems where optimization of operation and human simulation are important factors. In the paper we provide an ... |
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| Optimal Path Planning for Multi-Arm, Multi-Link Robotic Manipulators |
DEC 2008 |
121 pages |
| Authors:
Joseph A. Cascio; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This work investigates the problem of robotic arm control with the goal of achieving given performance requirements by solving for the optimal joint trajectories and corresponding controls for tasks, such as point-to-point positioning. The resulting optimal control problem is highly nonlinear and constrained due to the nonlinearities in the robotic arm dynamics and kinodynamic constraints including limits on joint velocities and actuator torques. This thesis illustrates the applicability of pseudospectral ... |
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| Observation of Nonlinear Transmission Enhancement in Cavities Filled With Nonlinear Organic Materials |
01-Nov-2008 |
8 pages |
| Authors:
Dan T Nguyen; ChuanXiang Sheng; Jayan Thomas; Robert Norwood; Brian Kimball; Diane M Steeves; Nasser Peyghambarian; ARIZONA UNIV TUCSON
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| We show experimental and theoretical results for enhancement of nonlinear transmission (NT) in moderate finesse cavities filled with nonlinear organic materials (NLOM). Our design for enhancement of nonlinear transmission using micro NLOM cavities compared with reference samples of the same material show that single cavities can enhance the nonlinear response by a factor of 10 or greater under high-absorption conditions. Further enhancement can be achieved in multiple-cavity structures. Other advantages ... |
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