| Root Locus Properties of Adaptive Beamforming and Capon Estimation for Uniform Linear Arrays |
20 DEC 2004 |
8 pages |
| Authors:
Allan Steinhardt; ALPHATECH INC BURLINGTON MA
|
 | In this paper we explore properties of the zeroes of the transfer function (Z transform) of the weight vector arising in adaptive beamforming and direction of arrival estimation (Capon) using sample matrix inversion. Our analysis sheds insights on properties of diagonal loading, as well as high- resolution properties of Capon's estimate. The analysis also provides hints at how to extend these properties to nonuniform array manifolds. Specifically we prove the ... |
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| Extensible Probabilistic Repository Technology (XPRT) |
OCT 2004 |
54 pages |
| Authors:
Fortis Barlos; ALPHATECH INC BURLINGTON MA
|
| Searching for and retrieving information from multiple, legacy data sources has become a critical need in areas such as counterterrorism data mining, all-source analysis, and law enforcement. Critical data is often scattered across conventional databases, web pages, XML (extensible markup language) repositories, and free text and multimedia data stores employing multiple schemas or even schema-less formats. The Extensible Probabilistic Repository Technology, XPRT, enables users and applications to search for and ... |
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| Plan Critiquing and Look-Ahead Constraint Reasoning for Active Templates |
OCT 2004 |
70 pages |
| Authors:
Christopher M. White; ALPHATECH INC BURLINGTON MA
|
| The primary objective of this program was to develop knowledge-based Active Templates technology to help Special Operations Forces (SOF) planning staff quickly build robust and agile plans, and then monitor their execution. To this end, we conducted research and development in four major areas. First, we developed a SOF knowledge representation language and example scenario for representing mission plans and constraints on those plans. Second, we developed a template-based natural ... |
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| Low Observability Path Planning for an Unmanned Air Vehicle Using Mixed Integer Linear Programming |
APR 2004 |
10 pages |
| Authors:
Atif Chaudhry; Kathy Misovec; Raffaello D'Andrea; ALPHATECH INC BURLINGTON MA
|
| Detection of an Unmanned Air Vehicle by radar is dependent on many variables including range, altitude, and relative orientation. Given a radar location and appropriate model for the likelihood of detection, a path plan can be created for an Unmanned Air Vehicle which constrains the probability of detection. In this paper such an approach is taken using a linearized detection model. The detection model and the Unmanned Air Vehicle's dynamics ... |
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| Decomposition Techniques for Temporal Resource Allocation |
APR 2004 |
8 pages |
| Authors:
Cynara C. Wu; David A. Castanon; ALPHATECH INC BURLINGTON MA
|
| We consider the problem of allocating a set of heterogeneous resources with availability constraints to maximize a given value function. The problem arises in a wide variety of military and industrial situations. We formulate the problem as a discrete- state decision process. We consider two instances of the problem that is applicable in situations where persistent coverage over all stages is desired. While we were able to solve the first ... |
|
| The Use of Texture Measures in Improving Mine Classification Performance |
01-Sep-2003 |
8 pages |
| Authors:
Gerald J Dobeck; Martin G Bello; ALPHATECH INC BURLINGTON MA
|
| Research over the last 9 years has resulted in an effective mine classification approach that involves the use of image-segmentation based screening methods followed by multilayer perceptron networks for mine classification. The present approach centers around a baseline 23 Feature set related to highlight, shadow, and highlight/shadow contrast statistic based segmentations, and the use of associated statistical and shape related factors. In the work described here we investigate the improvement ... |
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| Performance Prediction Model for Road-Constrained Multiple Target Tracking |
APR 2003 |
|
| Authors:
Pablo O. Arambel; Eugene Lavely; Herb Landau; ALPHATECH INC BURLINGTON MA
|
 | The performance of tracking systems depends on numerous factors including the scenario, operating conditions, and choice of tracker algorithms. For tracker system design, mission planning, and sensor resource management, the availability of a tracker performance model (TPM) for the standard measures of performance (MOPs) would be of high practical value. Ideally, the TPM has high computational efficiency, and is insensitive to the particular low-level details of highly complex algorithms and ... |
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| Low-Observable Nonlinear Trajectory Generation for Unmanned Air Vehicles |
MAR 2003 |
24 pages |
| Authors:
K. Misovec; T. Inanc; J. Wohletz; R. Murray; ALPHATECH INC BURLINGTON MA
|
| This paper explores low observablity flight path planning of unmanned air vehicles in the presence of radar detection systems. The probability of detection model of an aircraft near an enemy radar depends on aircraft attitude, range, and configuration. A detection model is coupled with a simplified aircraft dynamics model. The Nonlinear Trajectory Generation (NTG) software package developed at Caltech is used. NTG algorithm is a gradient descent optimization method that ... |
|
| An Extensible, Ontology-based, Distributed Information System Architecture |
2003 |
8 pages |
| Authors:
Alan I. Chao; Basil C. Krikeles; Angela E. Lusignan; Edward Starczewski; ALPHATECH INC BURLINGTON MA
|
| The AFRL-sponsored Adaptive Sensor Fusion (ASF) program produced a software framework, the eXtensible Distributed Architecture (XDA), which facilitates the construction of scalable, flexible distributed systems. XDA is based on a simple ontology mechanism that enables the definition and maintenance of high-level object models to capture the shared semantics necessary for interoperability. This ontology based approach strikes a balance between having enough expressiveness to capture complex semantic interactions between components and ... |
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| Model Predictive Control for Dynamic Unreliable Resource Allocation |
DEC 2002 |
8 pages |
| Authors:
David A. Castanon; Jerry M. Wohletz; ALPHATECH INC BURLINGTON MA
|
| In this paper, we consider a class of unreliable resource allocation problems where resources assigned may fail to complete a task, and the outcomes of past resource allocations are observed before new resource allocations are selected. The resulting temporal allocation problem is a stochastic control problem, with a state space and control space that grow exponentially in cardinality with the number of tasks. We introduce an approximation by enlarging the ... |
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| Agile Control of Military Operations Joint Force Air Component Commander (JFACC) |
AUG 2002 |
113 pages |
| Authors:
D. A. Logan; J. M. Wohletz; D. A. Castanon; M. L. Burry; B. Bank; ALPHATECH INC BURLINGTON MA
|
| This research focused on the problem of providing military commanders with real-time, optimal control of military air-to-ground operations for a 24- hour segment of a Joint Air Operations (JAO) campaign. In particular, we focused on developing control algorithms that anticipate possible air-to-ground mission modifications due to uncertain future events, thereby generating missions that can be readily adapted in the presence of contingencies. The primary benefit of this technology is agile ... |
|
| Fuselet Design and Implementation: A Practical Framework for the Creation of the Joint Battlespace Infosphere |
JUN 2002 |
35 pages |
| Authors:
Eric Jones; Basil Krikeles; Howawrd Reubenstein; Dan Bostwick; ALPHATECH INC BURLINGTON MA
|
| In this effort, two fuselet authoring tools were developed and incorporated in a demonstration system utilizing AFRL's Adaptive Sensor Fusion (ASF) technology for data communication and component encapsulation. Fuselet components created by the authoring tools fall into two categories: adaptor fuselets and correlator fuselets. These fuselets were demonstrated in the context of a Joint Battlespace Infosphere (JBI) operational scenario. |
|
| Battlespace Challenge Problems Evaluation of High Performance Knowledge Bases (HPKB) Tools for Battlefield Awareness and Planning |
MAR 2002 |
79 pages |
| Authors:
Eric K. Jones; Robert R. Tenney; Kendra B. Moore; Joel S. Douglas and; Leonard Lublin; ALPHATECH INC BURLINGTON MA
|
| This final report documents a series of mini Challenge Problem (CP) evaluations aimed at addressing key technical issues in the application of a broad range or Artificial Intelligence (Al) and related information technologies to timely battlespace problems. The Challenge Problem process includes: Define the problem or need addressed. Match/validate operational requirements to the broad capabilities or AI and related information technologies, and develop vision/concept/architectural views of the problem. Assemble materials ... |
|
| MULTI-TARGET TRACKING WITH UNATTENDED GROUND SENSORS (UGS) DATA, |
FEB 2002 |
|
| Authors:
Stefano Coraluppi; Craig Carthel; MAHENDRA MALLICK; ALPHATECH INC BURLINGTON MA
|
| (U) THIS PAPER PRESENTS A STUDY OF AN EXTENDED KALMAN FILTER/MULTI-HYPOTHESIS TRACKING (EKD/MHT) APPROACH TO TARGET TRACKING WITH DATA FROM SEISMIC AND ACOUSTIC SENSORS. THE STUDY IMPACTS ON TRACKING PERFORMANCE OF THE NUMBER, PLACEMENT, AND DETECTION THRESHOLD ASSOCIATED WITH THESE SENSORS. THE AUTHORS CLAIM THAT THE ALGORITHM USED SCALES WELL AS THE NUMBER OF SENSORS INCREASES, INDICATING ITS SUITABILITY FOR PROCESSING DATA SETS ASSOCIATED WITH LARGE NUMBERS OF UNATTENDED GROUND ... |
|
| MULTI-SENSOR SINGLE TARGET BEARING-ONLY TRACKING IN CLUTTER, |
FEB 2002 |
|
| Authors:
MAHENDRA MALLICK; T. KIRUBARAJAN; ALPHATECH INC BURLINGTON MA
|
| (U) THIS PAPER ADDRESSES THE PROBLEM OF SINGLE TARGET TRACKING IN CLUTTER USING MULTIPLE ACOUSTIC UGS, WHICH DETERMINES THE BEARING OF A TARGET BY PROCESSING THE INCOMING ACOUSTIC SIGNAL. OTHER DERIVED MEASUREMENTS LIKE HARMONIC FREQUENCIES ARE ALSO AVAILABLE. THE ANALYSIS IN THE PAPER IS RESTRICTED TO A SINGLE TARGET TRACKING USING BEARING-ONLY MEASUREMENTS FROM MULTIPLE UGS. THE PAPER PRESENTS ALGORITHMS AND NUMERICAL RESULTS USING PARTICLE FILTER AND PROBABILISTIC DATA ASSOCIATION ... |
|
| ALL-SOURCE TRACK AND IDENTITY FUSION: RECENT ADVANCES AND RESULTS, |
FEB 2002 |
|
| Authors:
Stefano Coraluppi; Craig Carthel; Susan Lynch; DONALD HERRICK; ALPHATECH INC BURLINGTON MA
|
| (U) THIS PAPER EXTENDS PREVIOUS ANALYSIS OF ALL-SOURCE TRACK AND IDENTITY FUSER (ATIF) TO INCLUDE THE EFFECTS OF THE QUALITY AND QUANTITY OF INCOMING DATA AND THE EFFECTS OF SCENARIO COMPLEXITY. THE RESULTS PRESENTED ARE BASED ON TWO SCENARIOS AT EGLIN AFB, AND A MUCH LARGER SCENARIO AT THE NATIONAL TEST CENTER. |
|
| A Knowledge-Based Indications and Warning Toolkit for Mixed-Initiative Information Warfare Analysis |
12 DEC 2001 |
|
| Authors:
Eric K. Jones; ALPHATECH INC BURLINGTON MA
|
| Shipboard intelligence centers deployed in littoral regions are the "front line" for naval intelligence gathering. Onboard cryptanalysts need to monitor multiple information sources for trends and deviations from expected norms, detect and properly interpret the unusual, and generate Indications and Warning (I&W). Anticipated reductions in shipboard manning and increases in the quantity of available sensor data will further exacerbate workload for intelligence personnel. New information fusion technology is required to ... |
|
| Agile Control of Military Operations (JFACC) |
NOV 2001 |
151 pages |
| Authors:
David Logan; Jerry M. Wohletz; David A. Castanyon; Michael L. Curry; Brian Bank; ALPHATECH INC BURLINGTON MA
|
| This research focused on the problem of providing military commanders with real-time, optimal control of military air-to-ground operations for a 24- hour segment of a Joint Air Operations (JAO) campaign. In particular, we focused on developing control algorithms that anticipate possible air-to-ground mission modifications due to uncertain future events, thereby generating missions that can be readily adapted in the presence of contingencies. The primary benefit of this technology is agile ... |
|
| Multi-Sensor Single Target Bearing-Only Tracking in Clutter |
OCT 2001 |
18 pages |
| Authors:
Mahendra Mallick; T. Kirubarajan; ALPHATECH INC BURLINGTON MA
|
| In this paper, we have addressed the single target multiple acoustic UGS tracking in clutter using the particle filter (PF) algorithm. We have used realistic values for the probability of detection and false alarm. We have demonstrated that the PF algorithm works in a robust manner when the probability of detection is low and the false alarm is high as is the case in realistic harsh scenarios. In our future ... |
|
| Multi-Target Tracking with Unattended Ground Sensors (UGS) Data |
OCT 2001 |
11 pages |
| Authors:
Stefano Coraluppi; Craig Carthel; Mahendra Mallick; ALPHATECH INC BURLINGTON MA
|
| This paper studies the performance of an Extended Kalman Filter/ Multi-Hypothesis Tracking (EKF/MHT) tracking with data from seismic and acoustic sensors. We study the impact of tracking performance of the number, placement, and detection threshold associated with these sensors. Our algorithm scales well as the number of sensors increases, indicating its suitability for processing data sets associated with large numbers of unattended ground sensors. |
|
| Effects-Based CyberCOA Optimization Technology & Experiments: Predicting the Impact of Disruptions to BMC3 Workflow |
APR 2001 |
32 pages |
| Authors:
John Shaw; Leonard Lublin; ALPHATECH INC BURLINGTON MA
|
| This report discusses the feasibility of developing advanced, closed- loop, optimal control technology, which will allow a cybercommander to formulate and select Courses of Action (COAs) that balance security objectives against mission effectiveness. The initial formulation includes a plant model (incorporating the cyber-network assignment of processes and information flows to elements of the cyber-network, and a mission model) with a unified objective function incorporating the commander's goals of both Information ... |
|
| New World Vistas: Planning and Scheduling Planning and Scheduling With Contingencies |
FEB 2001 |
83 pages |
| Authors:
Michael Curry; David A. Castanon; ALPHATECH INC BURLINGTON MA
|
| Planning and scheduling have been identified as one of several critical technology areas required to achieve information superior. In order to exploit future information systems that provide information in real-time, commanders must have fast real-time techniques to modify plans in the presence of uncertainty, and which anticipate future replanning so that the original plans can be modified with minimal impact. |
|
| Issues of Adaptive Automated Surveys in a Computer Network Environment |
FEB 2001 |
56 pages |
| Authors:
Elliot E. Entin; Caroline Kerrigan; Michael Berbaum; Patrice Lancey; Debra McCallum; ALPHATECH INC BURLINGTON MA
|
| Computer-based surveys administered over a computer network hold out a myriad of possibilities for tailoring surveys to particular groups or even to individual respondents, including adaptive automated surveys and new types of surveys never possible before. Computer-administered surveys allow survey items and instructions to be conveyed textually, graphically, and even in animation. Computer networks thus provide an ideal medium on which to conduct innovative, multimedia, dynamic surveys--surveys that can be ... |
|
| Development and Evaluation of a Program for Training Information Management in Distributed Organizations |
OCT 2000 |
141 pages |
| Authors:
Eileen B. Entin; Elliot E. Entin; Kathy Hess; ALPHATECH INC BURLINGTON MA
|
| A theory-based model of information management was created to develop a training program to train effective information management. The training program focused on the specific behaviors "prepare, filter, scan, read, and act" and helped information managers deal more effectively with large amounts of information. Implicated ways in which the training paradigm could be improved and developed even further. The program fits in a niche that has been ... |
|
| ALL-SOURCE TRACK AND IDENTITY FUSION, |
OCT 2000 |
|
| Authors:
Stefano Coraluppi; Craig Carthel; MARK LUETTGEN; Susan Lynch; ALPHATECH INC BURLINGTON MA
|
| (U) THIS PAPER ADDRESSES THE ASSOCIATION OF MOVING TARGET INDICATOR (MTI) TRACKS, EO AND SAR IMAGERY (IMINT) TRACKS, AND SIGNAL INTELLIGENCE (SIGINT) TRACKS, AND THE FUSION OF THE CORRESPONDING REPORT LEVEL KINEMATIC AND IDENTITY INFORMATION. A FUSION ALGORITHM IS BASED ON HYPOTHESIS-MANAGEMENT LOGIC WHICH RECURSIVELY PROCESSES INCOMING FRAMES OF DATA FROM UPSTREAM TRACKERS. THE LOGIC INCLUDES HYPOTHESIS GENERATION, SCORING, AND PRUNING COMPONENTS. THESE COMPONENTS ARE BASED ON TRACK INFORMATION, KINEMATIC ... |
|
| All-Source Track and Identity Fusion |
JUN 2000 |
18 pages |
| Authors:
Stefano Coraluppi; Craig Carthel; Mark Luettgen; Susan Lynch; ALPHATECH INC BURLINGTON MA
|
| This work addresses the association of moving-target indicator (MTI) tracks, EO and SAR imagery (IMINT) tracks, and signal intelligence (SIGINT) tracks, and the fusion of the corresponding report-level kinematic and identity information. Our fusion algorithm is based on hypothesis-management logic which recursively processes incoming frames of data from upstream trackers. The logic includes hypothesis generation, scoring, and pruning components. These components are based on track information, kinematic-state information, and vehicle ... |
|
| Workshop: Future Directions in Systems and Control Theory, Wednesday, June 23. Viewgraphs - Volume 2 |
23 JUN 1999 |
121 pages |
| Authors:
Robert R. Tenney; A. Pascoal; I. Kaminer; P. Oliveira; C. Silvestre; ALPHATECH INC BURLINGTON MA
|
| This report contains several reports concerning future directions in systems and control theory. |
|
| Autonomous Agents with Application to the Evaluation of Organizational Structures |
1999 |
8 pages |
| Authors:
Michael L. Curry; ALPHATECH INC BURLINGTON MA
|
| Experimental investigation of adaptive command and control (C2) organizations is limited in scope by the availability of qualified subjects and the complexity of experimental design and analysis for large organizational structures. These limitations challenge the study of adaptive architectures for command and control (A2C2) to represent a realistic command and control environment with a small number of human participants. This paper presents a method of representing large organizations by introducing ... |
|
| Planning and Scheduling: Dynamic Assignment and Scheduling with Contingencies |
MAR 98 |
41 pages |
| Authors:
David A. Castanon; David A. Logan; Dimitri P. Bertsekas; Stephen D. Patek; ALPHATECH INC BURLINGTON MA
|
| Planning and scheduling under uncertainty is important in many important Air Force operations. When real time monitoring of the progress of operations is available, it is possible to replan missions in response to contingencies. In this research, we investigated a class of planning and scheduling problems under uncertainty which captured important features of risky multiplatform Air Force missions. Planning and scheduling problems under uncertainty can be solved in principle by ... |
|
| COLLECTION MANAGEMENT AND DATA FUSION TECHNOLOGY, |
OCT 1997 |
|
| Authors:
CHARLES L. MOREFIELD; ALPHATECH INC BURLINGTON MA
|
| (U) THIS PAPER IS JUST THE AUTHOR'S ABSTRACT ACCORDING TO WHICH IN THE PRESENTATION HE TALKED BRIEFLY ON THE STATE OF THE FUSION ART WHICH CURRENTLY INVOLVES THE BOTTOM TWO TIERS OF THE 4-TIER FUSION ARCHITECTURE; I.E., MULTI-HYPOTHESIS TRACKING AND SITUATION AWARENESS; TURNING THEN TO THE TOP TIER OF THE LAYERED FUSION ARCHITECTURE, THAT OF PROCESS MANAGEMENT. A FUNCTIONAL AND OPERATIONAL ARCHITECTURE WAS ILLUSTRATED THAT LINKS COLLECTION MANAGEMENT TO THE ... |
|
| Overview of Wavelet/Neural Network Fault Diagnostic Methods Applied to Rotating Machinery |
APR 1996 |
14 pages |
| Authors:
Jose E. Lopez; Inna A. Yeldham; Kevin Oliver; ALPHATECH INC BURLINGTON MA
|
| New technology in the form of wavelet-based methods coupled with intelligent classification schemes built around neural networks, can drive the development of substantially improved fault detection and identification (FDI) methods. Such systems represent important next generation FDI kernels for integration into advanced condition based maintenance systems for rotating machinery. This paper presents an overview of the results obtained by ALPHATECH in a program aimed at developing wavelet/neural network based FDI ... |
|
| Military Command Decisionmaking Expertise |
JAN 96 |
111 pages |
| Authors:
James C. Deckert; Elleen B. Entin; Elliot E. Entin; Jean MacMillan; ALPHATECH INC BURLINGTON MA
|
| This report describes the development and validation of a theoretical framework for the investigation of tactical decisionmaking expertise. The theoretical framework was developed based upon interviews with U.S. Army command decisionmaking experts and a review of the literature on expertise. The primary means of validation was the conduct of a set of scenario-driven experiments using as subjects Army officers ranging in rank and experience from captain through General Officer. Three ... |
|
| Structuring and Training High-Reliability Teams. Draft |
MAR 94 |
64 pages |
| Authors:
Jean MacMillan; Elliot E. Entin; Eileen B. Entin; Daniel Serfaty; ALPHATECH INC BURLINGTON MA
|
| The performance of teams working together to control complex systems has become increasingly important for a variety of military and civilian applications, and there is growing interest in identifying and understanding the factors that affect the reliability of such teams. A better understanding is needed of the coordination strategies used by superior teams to maintain acceptable performance in demanding environments in order to develop methods for structuring and training reliable ... |
|
| Structuring and Training High-Reliability Teams |
23 NOV 93 |
107 pages |
| Authors:
Eileen B. Entin; Elliot E. Entir; Jean MacMilla; Daniel Serfaty; ALPHATECH INC BURLINGTON MA
|
| This report describes activities during the first year of a research project sponsored by the U.S. Army Research Institute (Aviation Research and Development Activity) on the role of team coordination in reliable team performance. First year activities included a review of the team-measurement literature, the development of a measurement approach based on a theoretical framework for team coordination, the development of a data-collection instrument for rigorous quantitative measurement of team ... |
|
| Incipient Failure Detection Using Wavelets |
DEC 92 |
|
| Authors:
Robert R. Tenney; Alonso E. Rhenals; James C. Deckert; Alan S. Willsky; ALPHATECH INC BURLINGTON MA
|
| This project demonstrated the feasibility of incipient fault detection for vibrating systems not only for bench test conditions (helicopter gearbox) but also for mild operating conditions (condensate and fire pumps). We employed only one of the several available data channels from the multiple accelerometers mounted on the case of each equipment type. We used a continuous wavelet transform (CWT), based on the Kiang wavelet, to select features for an artificial ... |
|
| Wavelet Features for Failure Detection and Identification in Vibration Systems |
DEC 92 |
|
| Authors:
James C. Deckert; Alonso E. Rhenals; Robert R. Tenney; Alan S. Willsky; ALPHATECH INC BURLINGTON MA
|
| The result of this effort is an extremely flexible and powerful methodology for failure detection and identification (FDI) in vibrating systems. The essential elements of this methodology are: (1) an off-line set of techniques to identify high-energy, statistically significant features in the continuous wavelet transform (CWT); (2) a CWT-based preprocessor to extract the most useful features from the sensor signal; and (3) simple artificial neural networks (incorporating a mechanism to ... |
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| Inertia and Adaptation in the Sequential Processing of Information, |
17 APR 1992 |
|
| Authors:
Elliot E. Entine; ALPHATECH INC BURLINGTON MA
|
| The contrast-inertia model of Einhorn and Hogarth (1987) suggests that decisionmakers revise their beliefs differently depending on the order in which they view a sequence of confirming and disconfirming evidence. Results reported in Entin et al. (1989) support this hypothesized order effect. It has been suggested that the order effect may be sensitive to the elapsed time between information presentations. The current experiment replicated the findings of Entin et al. ... |
|
| Analysis and Demonstration of Diagnostic Performance in Modern Electronic Systems |
AUG 91 |
204 pages |
| Authors:
Jerold L. Weiss; James C. Deckert; Kevin B. Kelly; ALPHATECH INC BURLINGTON MA
|
| This report presents methods and procedures for validation and demonstration of diagnostic system performance for use as part of the Government's acceptance test procedures for electronic systems having contractual diagnostic requirements. These methods provide for examining the adequacy of the diagnostics architecture, establishing bounds on fraction of faults detected (FFD) and fraction of faults isolated (FFI) (the only two figures of merit considered here), and choosing faults to be inserted ... |
|
| Training Decisions Modeling Simulation Environment |
MAY 91 |
23 pages |
| Authors:
Robert J. Glushko; ALPHATECH INC BURLINGTON MA
|
| This document summarizes the design plan for a Training Decision Modeling Simulation Environment. The simulation environment is intended to demonstrate the emerging capabilities of the Training Decisions System (TDS) under development at the Air Force Human Resources Laboratory. The design plan specifies the TDS capabilities which will be incorporated into the simulation environment and a plan for the design of the environment itself. The design plan envisions a demonstrator which ... |
|
| Mapping Missions Onto C3 Organizations: Incorporating the Goal Dimension in IAT |
09 MAY 90 |
|
| Authors:
Petros Kapasouris; Daniel Serfaty; Joseph G. Wohl; James C. Deckert; Krishna R. Pattipati; ALPHATECH INC BURLINGTON MA
|
| Previous work on Integrated Analysis Techniques (IAT) for C3 system representation, analysis, and design developed a representation framework consisting of the four dimensions of process, resource, organization, and goal; introduced stochastic, timed, attributed Petri nets (STAPNs) as an appropriate mathematical modeling construct; and developed tools and techniques to incorporate three of the IAT dimensions (process, resource, and organization) into that construct. In this report we address the remaining goal dimension ... |
|
| Information Gathering and Decisionmaking under Stress |
JAN 90 |
|
| Authors:
Elliot E. Entin; Daniel Serfaty; ALPHATECH INC BURLINGTON MA
|
| An experiment to investigate the effects of cognitive stress on decisionmaking performance is described. The paradigm involves a single decisionmaker (DM) whose job is to classify a submarine sonar return as coming from a friendly or enemy boat, on the basis of difference in average pump noise frequency between the two classes. After being given the value of the unknown submarine's measured pump frequency, the subject may classify the submarine ... |
|
| Development of Advanced WTA Algorithms for Parallel Processing |
OCT 89 |
|
| Authors:
David A. Castanon; ALPHATECH INC BURLINGTON MA
|
| The objective of weapon-target assignment (WTA) in a ballistic missile defense (BMD) system is to determine how defensive weapons should be assigned to boosters and reentry vehicles in order to maximize the survival of assets belonging to the U.S. and allied countries. The implied optimization problem requires consideration of a large number of potential weapon target assignments in order to select the most effective combination of assignments. The resulting WTA ... |
|
| Fault-Tolerant Computer Architecture Modeling and Analysis |
FEB 89 |
|
| Authors:
M. P. Kastner; S. R. Dunham; K. R. Pattipati; J. M. Stueve; L. C. Kramer; ALPHATECH INC BURLINGTON MA
|
| This document is the final report. It describes a three-year research effort to develop an engineering tool capable of supporting design and analysis of large-scale, parallel, fault-tolerant computer architectures (FTCAs). The tool, a software package called Computer-Aided Performance and Reliability Evaluation System (CAPRES), allows an FTCA designer or FTCA-design evaluator to predict, by analytical means, the performance, reliability, and performability of candidate computer architectures executing candidate workloads, rather than requiring ... |
|
| Passive Acoustic Tracking and Filtering Problems with Time Scales |
NOV 87 |
|
| Authors:
Adam Caromicoli; Robert B. Washburn; Alan S. Willsky; ALPHATECH INC BURLINGTON MA
|
| The airborne ASW tracking problem is becoming progressively more difficult every year. The continued efforts of our adversaries toward quieter, faster assets with longer ranged weapons imply the need or more powerful localization and tracking systems able to extract maximum information from lower signal strengths and to obtain fire control solutions as quickly as possible. Current systems work by extracting bearing and Doppler information from narrow band signals and then ... |
|
| Integrated Analysis Techniques for Command, Control, and Communications Systems. Volume 1. Methodology |
NOV 87 |
195 pages |
| Authors:
Joseph G. Wohl; Robert R. Tenney; ALPHATECH INC BURLINGTON MA
|
| This report consists of a two volumes: In Volume I, the Integrated Analysis Technique (IAT) for Command, Control and Communications (C3) systems are described, along with the background, concept, requisite methodologies, and recommendations for an automated analyst's aid. In Volume II, recommendations for an automated analyst's aid. In Volume 2, the evolution of IAT via successive trial applications to three (C3) systems or subsystems is described and the lessons learned ... |
|
| Integrated Analysis Techniques for Command, Control, and Communications Systems. Volume 2. Applications |
NOV 87 |
|
| Authors:
Joseph G. Wohl; Robert R. Tenney; ALPHATECH INC BURLINGTON MA
|
| This report consists of two volumes: In Volume I, the Integrated Analysis Techniques (IAT) for Command, Control and Communications (C3) systems, are described, along with the background, concept, requisite methodologies, and recommendations for an automated analyst's aid. In Volume II, the evolution of IAT via successive trial applications to three (C3) systems is described and the lessons learned are summarized. This second volume describes in detail the trial applications of ... |
|
| The Effects of Cognitive Style and Prior Information on Multi-Stage Decisionmaking |
MAY 87 |
|
| Authors:
Elliot E. Entin; Ronald M. James; Daniel Serfaty; John A. Forester; ALPHATECH INC BURLINGTON MA
|
| Drawing on the decisionmaking literature and on an initial ROC experiment a research design was formulated to investigate multi-stage decisionmaking and cognitive style in conditions of uncertainty. Subjects participating in the simulation experiment were required to discriminate between missile attack or a missile test condition based on probabilistic imperfect information. Results from the signal detection analyses replicated the earlier effects: subjects possessing an analytic style made significantly better discriminations than ... |
|
| Study of Computational Structures for Multiobject Tracking Algorithms |
DEC 86 |
|
| Authors:
Thomas G. Allen; Thomas Kurien; Robert B. Washburn Jr; ALPHATECH INC BURLINGTON MA
|
| The structure and performance of multiobject tracking algorithms are heavily constrained by their current implementation on sequential computer architectures. Near-optimal algorithms, such as the track-oriented approach under investigation here, impose prohibitive requirements on sequential processors. These requirements force one to use near-optimal algorithms only in low target density environments and to employ faster but less optimal tracking algorithms in the more demanding high density situations. Identifying, enhancing, and exploiting the ... |
|
| Studies in Mathematical Models of Human Decisionmaking in Gaming Situations |
06 APR 1986 |
156 pages |
| Authors:
David A. Castanon; ALPHATECH INC BURLINGTON MA
|
| This document studies two classes of mathematical models of dynamics multiperson decisionmaking which focus on the subjective nature of human decisionmaking. It develops extensions to game theory models which allow for differences in subjective perceptions of the decision problem among decisionmakers. Studies are the effects of these extensions on qualitative results available for two multiperson decisionmaking paradigms, one cooperative and one noncooperative, and characterize new classes of outcomes which become ... |
|
| Adaptive Aiding for Human-Computer Control: Experimental Studies of Dynamic Task Allocation |
JAN 86 |
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| Authors:
Nancy M. Morris; William B. Rouse; ALPHATECH INC BURLINGTON MA
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| Adaptive aids are those that allocate, partition, or transform tasks dynamically in response to system or operator state in order to maximize system performance. The ultimate goal of this research is the identification of guidelines for the implementation of adaptive aids which can be useful to system designers. In the experimental task environment developed for this research, subjects perform a subcritical compensatory tracking task while simultaneously identifying targets (spotting) on ... |
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