By Topic

Systems, Man and Cybernetics, Part A: Systems and Humans, IEEE Transactions on

Issue 2 • Date March 2002

Filter Results

Displaying Results 1 - 11 of 11
  • Comments on "Adaptive control and identification using one neural network for a class of plants with uncertainties"

    Publication Year: 2002 , Page(s): 279 - 280
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (187 KB) |  | HTML iconHTML  

    In the above paper, Tsuji et al. (see ibid. vol.28 (1998)) proposed an interesting scheme for adaptive control that uses only one neural network (NN). Moreover, the stability of the parametric and identification errors was analyzed and a sufficient condition for it was presented. However, since the selected signals for the NN input were not the natural choice, their scheme presents some problems. This study intends to circumvent these problems by modifying the scheme proposed in the work of Tsuji et al., and to highlight some advantages of the modified scheme. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient parallel algorithms for distance maps of 2D binary images using an optical bus

    Publication Year: 2002 , Page(s): 228 - 236
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (302 KB)  

    Computing a distance map (distance transform) is an operation that converts a 2D image consisting of black and white pixels to an image where each pixel has a value or a pair of coordinates that represents the distance to or location of the nearest black pixel. It is a basic operation in image processing and computer vision fields, and is used for expanding, shrinking, thinning, segmentation, clustering, computing shape, object reconstruction, etc. This paper examines the possibility of implementing the problem of finding a distance map for an image efficiently using an optical bus. The computational model considered is the linear array with a reconfigurable pipelined bus system (LARPBS), which has been introduced recently based on current electronic and optical technologies. It is shown that the problem for an n × n image can be implemented in O(log n log log n) bus cycles deterministically or in O(log n) bus cycles with high probability on an LARPBS with n2 processors. We also show that the problem can be solved in O(log log n) bus cycles deterministically or in O(l) bus cycles with high probability on an LARPBS with n3 processors. Scalability of the algorithms is also discussed briefly. The algorithm compares favorably to the best known parallel algorithms for the same problem in the literature. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamics of local search heuristics for the traveling salesman problem

    Publication Year: 2002 , Page(s): 173 - 184
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1150 KB) |  | HTML iconHTML  

    This paper experimentally investigates the dynamical behavior of a search process in a local heuristic search system for a combinatorial optimization problem. Or-opt heuristic algorithm is chosen as the study subject, and the well-known traveling salesman problem (TSP) serves as a problem testbed. This study constructs the search trajectory by using the time-delay method, evaluates the dynamics of the local search system by estimating the correlation dimension for the search trajectory, and illustrates the transition of the local search process from high-dimensional stochastic to low dimensional chaotic behavior. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Robot visual servoing with iterative learning control

    Publication Year: 2002 , Page(s): 281 - 287
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (351 KB) |  | HTML iconHTML  

    This paper presents an iterative learning scheme for vision-guided robot trajectory tracking. First, a stability criterion for designing iterative learning controller is proposed. It can be used for a system with initial resetting error. By using the criterion, one can convert the design problem into finding a positive definite discrete matrix kernel and a more general form of learning control can be obtained. Then, a three-dimensional (3D) trajectory tracking system with a single static camera to realize robot movement imitation is presented based on this criterion. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Swiss army knife and Ockham's razor: modeling and facilitating operator's comprehension in complex dynamic tasks

    Publication Year: 2002 , Page(s): 185 - 199
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (601 KB) |  | HTML iconHTML  

    This paper identifies two contending metaphors of the mind, and outlines a model of comprehension informed by the parsimony principle ("Ockham's razor"). The model, called virtual associative network (VAN), is applied to explain human performance and improve decision aiding in complex tasks involving multiple variables and rapidly changing constraints. This model is compared to a conventional modeling paradigm ("Swiss army knife") representing the mind as a "toolkit" of special purpose "instruments" (or modules). The paper has four sections. The first section introduces the VAN model focusing on its key assumptions. The second section runs computational experiments to assess the mathematical validity of these assumptions. Next, some of the model's decision aiding applications are demonstrated. The concluding section discusses agreement and the lack of such between the VAN model and other cognitive theories. Discussion centers on assessing VAN's plausibility vis-a-vis recent neuropsychological findings. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Audio feedback system for teleoperation experiments on engineering test satellite VII system design and assessment using eye mark recorder for capturing task

    Publication Year: 2002 , Page(s): 237 - 247
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (623 KB)  

    When operating space robots, safety and reliability are the most important issues-even at the expense of dexterity and swiftness. This makes it very stressful for operators to teleoperate space robots, especially since they cannot be repaired during operation, unlike ground robots. Furthermore, operators have to quickly analyze a large amount of information about the target objects and immediately make decisions on how to proceed. The majority of this information is presented visually, including digital values, status displays, 3D computer simulation, and camera images. Therefore, we developed an audio feedback system that can convey some of this information in order to improve the operator's decision-making and avoid accidents. We used an eye-mark-recorder to assess the performance of this system. Audio systems for information presentation have previously only been proposed for ground-based operation systems. This is the first case in which sound has been utilized for space robot operation, even though sound does not actually exist in space. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A system design framework-driven implementation of a learning collaboratory

    Publication Year: 2002 , Page(s): 200 - 213
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (346 KB) |  | HTML iconHTML  

    This paper describes a design process to support the development of a learning collaboratory, a distributed, computer-based, virtual space for learning and work. A learning collaboratory, as a distributed distance learning environment, offers great opportunities to expand the way people teach and learn and to broaden educational opportunities to an ever increasing range of learners. The challenge is to design distance learning technologies that engender meaningful learning experiences that take full advantage of the power of computer-mediated communication to support innovative learner-centered and collaborative interactions between students, teachers, subject experts, and resources. First, the paper describes the learning collaboratory design framework (LUCIDIFY), a design process that integrates methods and concepts from cognitive systems engineering, theories of learning and instruction, distributed computing, and computer-supported collaborative learning to guide the principled design of learning collaboratories. Next, the paper describes how LUCIDIFY was used in the design and implementation of the collaborative learning environment for operational systems (CLEOS), a learning collaboratory for teachers, students, and practitioners in the physical sciences. CLEOS features two virtual instrument tutorials, an asynchronous messaging system, a project-based design and management application, and a collaborative multi-user domain infrastructure. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Approximation of n-dimensional data using spherical and ellipsoidal primitives

    Publication Year: 2002 , Page(s): 269 - 278
    Cited by:  Papers (12)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (358 KB)  

    This paper discusses the problem of approximating data points in n-dimensional Euclidean space using spherical and ellipsoidal surfaces. A closed form solution is provided for spherical approximation, while an efficient, globally optimal solution for the ellipsoidal problem is proposed in terms of semidefinite programming. In addition, the paper presents a result for robust fitting in presence of outliers, and illustrates the theory with several numerical examples. A brief survey is also presented on the solutions to other relevant geometric approximation problems, such as ellipsoidal covering of convex hulls and pattern separation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On adaptive agentlets for distributed divide-and-conquer: a dynamical systems approach

    Publication Year: 2002 , Page(s): 214 - 227
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (603 KB) |  | HTML iconHTML  

    This paper is concerned with the dynamics of autonomous agents in performing distributed problem-solving tasks. The goal of this work is to show: 1) how certain tasks may be handled by breeds of distributed agents self-reproduced by other agents in response to their local environment and 2) how the behavioral repository of the agents may be constructed based on some well-defined dynamical systems models. The breeds of agents progressively generated in the course of distributed problem-solving are referred to as agentlets. The specific task for demonstrating this dynamical systems-based agentlet-oriented approach is the one in which the agents are required to search and mark certain feature locations in a two-dimensional (2-D) search space by way of divide-and-conquer. In so doing, individual agents may have different dynamical motion, depending on when and where they are bred. This paper provides a detailed description of the agents of different dynamics and shows how the agentlets proceed with this task by moving according to their well-defined dynamics, breeding their offspring agents in the environment., and fine-tuning their dynamical systems parameters. In addition, it is proven that in the given example task, the designed agentlets will guarantee to reach all the feature locations in the search space. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A holistic roadmap for survivable infrastructure systems

    Publication Year: 2002 , Page(s): 260 - 268
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (242 KB) |  | HTML iconHTML  

    The role of a holistic risk assessment and management process in information technology (IT), information assurance (IA), and survivable dependable systems is the subject of this paper. To address the multiple dimensions and perspectives of the risks of terrorism to cyber and interconnected physical infrastructures, hierarchical holographic modeling is introduced and is related to the risk assessment and management process. The definition of information assurance as the trust that information presented by the system is accurate and is properly represented necessitates that trust, knowledge management, organizational behavior, and other nontechnology-based considerations be addressed in the protection of IA against terrorist attacks. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An application of passive human-robot interaction: human tracking based on attention distraction

    Publication Year: 2002 , Page(s): 248 - 259
    Cited by:  Papers (19)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (385 KB) |  | HTML iconHTML  

    In this research, a taxonomy is introduced to cover important considerations for human-robot interactions. As an application of passive human-robot interaction, two modalities for localizing humans based on sound source localization and infrared motion detection were developed and integrated with the face-tracker system of a humanoid ISAC (intelligent soft arm control), in order to direct ISACs attention and to prevent it from being quickly distracted. The sound source localization and passive infrared motion detection systems are used to provide the face-tracker system with candidate regions for finding a face. In order to avoid the situation where the robot appears to be "hyperactive" and cannot give sufficient attention to a newly discovered face, these sensing modules should not directly gain control of the tracking if the system has recently acquired a new face. Our goal is to allow a human to redirect the attention of the system but give the system a method to ignore the distraction if recently engaged. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

The fields of systems engineering and human machine systems: systems engineering includes efforts that involve issue formulation, issue analysis and modeling, and decision making and issue interpretation at any of the lifecycle phases associated with the definition, development, and implementation of large systems.

 

This Transactions ceased production in 2012. The current retitled publication is IEEE Transactions on Systems, Man, and Cybernetics: Systems.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Dr. Witold Pedrycz
University of Alberta