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Browsing by Subject "Feedback"

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    • Conference Object  

      Capacity of Binary State Symmetric Channel with and without feedback and transmission cost 

      Kourtellaris, C. K.; Charalambous, Charalambos D. (Institute of Electrical and Electronics Engineers Inc., 2015)
      We consider a unit memory channel, called Binary State Symmetric Channel (BSSC), in which the channel state is the modulo2 addition of the current channel input and the previous channel output. We derive closed form ...

    • Report  

      A Case-Based Electronic Learning Environment for Preservice Teacher Education 

      Angeli, Charoula; Bonk, Curtis Jay; Supplee, Lauren; Malikowski, Steve R. (1998)
      This study took place within a teacher education program at a large Midwestern university with vast field observation placements around the state and the world. The purpose was to discover whether preservice teacher ...

    • Conference Object  Open Access

      Computer assisted formative assessment: supporting students to become more reflective Learners 

      Whitelock, Denise (University of Cyprus, 2007)
      e-Assessment is being advocated in the UK as our way of introducing a more personalised learning agenda throughout the Higher Education sector. This paper discusses the findings from two projects where formative eassessment ...

    • Article  

      Design of strictly positive real systems using constant output feedback 

      Huang, C. -H; Ioannou, Petros A.; Maroulas, J.; Safonov, M. G. (1999)
      In this paper, the authors present a linear matrix inequality (LMI) approach to the strictly positive real (SPR) synthesis problem: find an output feedback K such that the closed-loop system T(s) is SPR. The authors establish ...

    • Conference Object  

      Feedback control over packet dropping network links 

      Mo, H.; Hadjicostis, Christoforos N. (2007)
      This paper studies stabilization schemes for a discrete-time control systems in which the feedback loop includes a network link that may suffer packet drops. We model the packet dropping network link as an erasure channel ...

    • Conference Object  

      Feedback does not increase the capacity of compound channels with additive noise 

      Loyka, S.; Charalambous, Charalambos D. (Institute of Electrical and Electronics Engineers Inc., 2016)
      A discrete compound channel with memory is considered, where no stationarity, ergodicity or information stability is required, and where the uncertainty set can be arbitrary. When the discrete noise is additive but otherwise ...

    • Article  

      Frequency domain and dynamic game methods for actuator/sensor selection in systems with sector nonlinearities 

      Demetriou, M. A.; Charalambous, Charalambos D. (2001)
      The purpose of this note is to provide a method for placing actuators and sensors in systems with nonlinear dynamics wherein the choices for actuator and sensor locations are such that the resulting system is rendered ...

    • Article  

      Information Structures for Feedback Capacity of Channels with Memory and Transmission Cost: Stochastic Optimal Control & Variational Equalities 

      Kourtellaris, C. K.; Charalambous, Charalambos D. (2017)
      The Finite Transmission Feedback Information (FTFI) capacity is characterized for any class of channel conditional distributions PBi|Bi-1, Ai and P Bi|Bi-1 i-M, Ai, where M is the memory of the channel, Bi ? {B-1, B0,..., ...

    • Conference Object  

      Information structures of capacity achieving distribution for channels with memory and feedback 

      Kourtellaris, C. K.; Charalambous, Charalambos D. (Institute of Electrical and Electronics Engineers Inc., 2016)
      The information structures of the optimal channel input distributions P[0,n] t {PAi|Ai-1,Bi-1 : i = 0,1.,n}, which correspond to the extremum problem of feedback capacity equation are identified, for any class of channel ...

    • Article  

      Information Transfer of Control Strategies: Dualities of Stochastic Optimal Control Theory and Feedback Capacity of Information Theory 

      Charalambous, Charalambos D.; Kourtellaris, C. K.; Tzortzis, I. (2017)
      The control-coding capacity of stochastic control systems is introduced, and its operational meaning is established using randomized control strategies, which simultaneously control output processes encode information, and ...

    • Conference Object  

      A low cost compact subharmonically pumped self oscillating mixer for MMIC applications 

      Roberts, M.; Iezekiel, Stavros; Snowden, C. M. (1997)

    • Article  

      Modeling and control design for a computer-controlled brake system 

      Raza, H.; Xu, Z.; Yang, B.; Ioannou, Petros A. (1997)
      The brake subsystem is one of the most significant parts of a vehicle with respect to safety. A computer-controlled brake system has the capability of acting faster than the human driver during emergencies, and therefore ...

    • Conference Object  

      On the channel capacity of wireless fading channels 

      Charalambous, Charalambos D.; Denic, S. (2002)
      The objectives of this paper are twofold. First, to point out the significance of certain results on stochastic processes in computing the channel capacity for flat fading wireless channels. Second, to design an optimal ...

    • Conference Object  

      On the role of feedback in the design of perfectly reconstructing equalizers 

      Touri, R.; Voulgaris, P. G.; Hadjicostis, Christoforos N. (2007)
      In this paper we consider the transmission of discrete data via a communication channel that is subject to (additive) noise with a known upper bound on its magnitude but otherwise completely unrestricted behavior. We are ...

    • Article  

      Performance analysis for a changepoint problem 

      Hibey, J. L.; Charalambos, C. D. (1999)
      Nonlinear stochastic differential equations are used to model a version of the changepoint problem. State estimates of the minimum mean-square-error-type are used in likelihood-ratio tests to detect the time of change. ...

    • Conference Object  Open Access

      Problem based learning over the internet 

      Schindler, Frank (University of Zilina, 2005)
      The main goal of this paper is to discuss a new form of learning that would be appropriate for application in Learning Management Systems utilized in distance education courses over the Internet. It is supposed to be good ...

    • Conference Object  

      Remarks on the explicit solutions for nonlinear partially observable stochastic control problems and relations to H∞ or robust control 

      Charalambous, Charalambos D.; Elliott, Robert J. (IEEE, 1995)
      Partially observable stochastic and H∞ control problems are considered. The dynamics include nonlinearities which are the gradient of some potential function in addition to linear terms, the observations are linear, and ...

    • Article  

      A robust adaptive nonlinear control design 

      Polycarpou, Marios M.; Ioannou, Petros A. (1996)
      An adaptive control design procedure for a class of nonlinear systems with both parametric uncertainty and unknown nonlinearities is presented. The unknown nonlinearities lie within some 'bounding functions', which are ...

    • Conference Object  

      Signalling of information in networked stochastic dynamical control systems 

      Charalambous, Charalambos D.; Kourtellaris, C.; Tzortzis, I. (Institute of Electrical and Electronics Engineers Inc., 2018)
      Signalling of information is made feasible from one controller to another controller, in a networked control system consisting of two interconnected control systems. In this application, controller 2 of control system 2 ...

    • Conference Object  

      Solvable risk-sensitive control problems with output feedback 

      Charalambous, Charalambos D.; Naidu, D. Subbaram; Moore, Kevin L. (IEEE, 1994)
      In this paper a partially observed nonlinear stochastic control with exponential running cost is considered. Explicit solutions for evaluating expectations of exponential functions are found when the control is assumed to ...

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