@conference {
	title = {Combined Estimation and Control of HMMs},
	author = {Frankpitt, Bernard., Baras, John S.},
	year = {1997},
	month = {12/1997},
	abstract = {The principal contribution of this paper is the presentation of the potential theoretical results that are needed for an application of stochastic approximation theory to the problem of demonstrating asymptomatic stability for combined estimation and control of a plant described by a hidden Markov model. We motivate the results by briefly describing a combined estimation and control problem. We show how the problem translates to the stochastic approximation framework. We also show how the Markov chain that underlies the stochastic approximation problem~can be decomposed into factors with discrete and continuous range. Finally, we use this decomposition to develop the results that are needed for an application of the ODE method to the stochastic control problem.},
	address = {San Diego, CA},
	booktitle = {1997 IEEE Conference on Decision and Control},
	pages = {pp. 2254-2259}
}
@conference {
	title = {Integrated Management of Large Satellite-Terrestrial Networks},
	author = {Baras, John S., Ball, Mike., Roussopoulos, Nick., Jang, Kap D., Stathatos, Kostas., Valluri, Jaibharat.},
	year = {1997},
	month = {11/1997},
	abstract = {Hybrid communication networks provide an economically feasible and technologically efficient means to implement the global information infrastructure. The management of such heterogeneous networks is a critical market differentiator for telecommunications companies and a formidable technical task. In this paper we describe our efforts in the Center for Satellite and Hybrid Communications Networks, to design and implement an integrated network management system for such networks. The major accomplishments to date are the design and implement an integrated network management system for such networks. The major accomplishments to date are the design and implementations of an object oriented data model for hybrid networks consisting of satellite networks and terrestrial ATM networks; the extension of the system to hybrid networks with as many as 300,000 nodes; the development of browsing graphical tools so that mesh-connected graph networks (as opposed to tree networks) can be efficiently queried; specifically designed graphical widgets for displaying performance data continuously from the network management information database (MIB); extensions of the GUI to distributed operation including appropriate designs for consistency and concurrency between the GUI display and the network MIB;~storage and organization issues for performance data in the MIB; integration of configuration management and performancce management.},
	address = {Monterey, CA},
	booktitle = {MILCOM \&rsquo;97},
	pages = {383-387}
}
@conference {
	title = {Hierarchical, Layered Modeling and Performance Evaluation of Hybrid Communication Networks},
	author = {Baras, John S., Corson, Scott M., Jang, Kap D., Liu, Mingyan., Misra, Archan., Xie, Hui.},
	year = {1997},
	month = {11/1997},
	abstract = {Commercial and military networks are rapidly becoming hybrid networks;~that is interconnected wireless terrestrial, wireline terrestrial and satellite networks. There is a great need for software tools to design, model and also do performance analysis efficiently for such large heterogeneous networks. This is the topic addressed in this paper. The hybrid network modeling and performance evaluation tool is currently under development at the University of Maryland. The tool consists of an algorithmic structure and a software architecture. The algorithm is hierarchical in form, deriving its structure from that of the network which follows the network{\textquoteright}s routing hierarchy. At each level, a node represents a set of nodes at a lower level. The boundary of a node is characterized by a set of statistical models. The statistics and their parametric representations for the models of the level 1 nodes are obtained from the OPNET simulations which are run offline. The model defines procedures that convey modeling, simulation and performance data up and down the hierarchy of models. We consider the following performance metrics only: end-to-end delay, throughput, blocking probabilities, cell or packet loss rate. We describe algorithms based on loss network approximations and fast progressive solutions of resulting fixed point equations.},
	address = {Monterey, CA},
	booktitle = {MILCOM \&rsquo;97},
	pages = {1-5}
}
@conference {
	title = {Automated Network Fault Management},
	author = {Baras, John S., Ball, Mike., Gupta, Sandeep., Viswanathan, P., Shah, Parthiv.},
	year = {1997},
	month = {11/1997},
	abstract = {Future military communication will have a mixture of backbone terrestrial, sattelite and wireless terrestrial networks. The speeds of these networks vary and they are very heterogeneous. As networks become faster, it is not enough to do reactive fault management. Our approach combines proactive and reactive fault management. Proactive fault management is implemented by dynamic and adaptive routing. Reactive fault management is implented by a combination of a neural network and an expert system. The system has been developed for the X.25 protocol. Several fault scenarios were modeled and included in the study: reduced switch capacity, increased packet gneration rate of a certain application, disabled switch in the X.25 cloud, disabled links. We also modeled occurence of alarms including severity of the problem, location of the event and a threshold. To detect and identify faults we use both numerical data associated with the perfomance objects (attributes) in the MIB as well as SNMP traps (alarms). Simulation experiments have been performed in order to understand the convergence of the algorithms, the training of the neural networks involved and the G2/NeurOn-Line software environment and MIB design.},
	address = {Monterey, CA},
	booktitle = {MILCOM \&rsquo;97},
	pages = {pp. 1244- 1250}
}
@conference {
	title = {Fast Asymmetric Internet Over Wireless Satellite-Terrestrial Networks},
	author = {Baras, John S., Corson, Scott M., Papademetriou, Spyro., Secka, Isatou., Suphasindhu, Narin.},
	year = {1997},
	month = {11/1997},
	abstract = {We describe our recent work on the design and implementation of high perfomrnace Internet services over networks consisting of interconnected Direct Broadcast (Satellite) hosts and terrestrial wireless LANs with various capabilities. The network uses receive only satellite links for downstream data delivery and wireless and wireline terrestrial links for the upstream path. A key concept in our work is that of a hybrid terminal which is a PC connected to a DBS antenna and to the local wireless LAN. The hybrid terminal uses a modem connection for outgoing traffic while receiving incoming information through the VSAT.},
	address = {Monterey, CA},
	booktitle = {MILCOM \&rsquo;97},
	pages = {372-377}
}
@conference {
	title = {Extensions of DBS and Hybrid Internet},
	author = {Karir, Manish., Bharadwaj, Vijay G., Holleman, Keith., Suphasindhu, Narin., Papademetriou, Spyro., Baras, John S.},
	year = {1997},
	month = {10/1997},
	abstract = {We describe some experiments which extend the DBS system, in particular, the DirecPC(TM) and DirecTV(TM) DBS, by using the PC with the satellite receiver as a gateway to connect networks together. We also discuss simple methods of receiving multimedia traffic from the multicast backbone (MBONE) [Cas94] over the satellite link, and distributing it, through this gateway, to end users.},
	address = {Budapest, Hungary},
	booktitle = {2nd ACM International Workshop on Satellite-Based Information Services (WOSBIS)},
	pages = {pp. 67-74}
}
@conference {
	title = {Infinite Dimensional Systems, Hardy Function Algebras, the Corona Theorem and Complexity},
	author = {Baras, John S.},
	year = {1997},
	month = {09/1997},
	address = {Kaiserslautern, Germany},
	booktitle = {Operators, Systems and Linear Algebra:  Three Decades of Algebraic Systems Theory, honoring Professor Paul A. Fuhrmann on his 60th birthday}
}
@conference {
	title = {Integrated Product and Process Design Environment Tool for Manufacturing T/R Modules},
	author = {Karne, Ramesh K., Baras, John S., Ball, Michael O., Bashyam, Sridhar., Kebede, Abraham., Williams, James T., Trichur, Vinai., Karir, Manish., Lai, Hsing-Tsu., Dandekar, Swati V.},
	year = {1997},
	month = {09/1997},
	abstract = {We present a decision making assistant tool for integrated product and process design environment for manufacturing applications. Specifically, we target microwave modules which use electro-mechanical components and require optimal solutions to reduce cost, improve quality, and gain leverage in time to market the product. This tool will assist the product and process designer to improve their productivity and also enable to cooperate and coordinate their designs through a common design interface. We consider a multiobjective optimization model that determines components and processes for a given conceptual designs for microwave modules. This model outputs a set of solutions that are Pareto optimal with respect to cost, quality, and other metrics. In addition, we identify system integrations issues for manufacturing applications, and propose and architecture which will serve as a building block to our continuing research in virtual manufacturing applications.},
	address = {Los Angeles, California},
	booktitle = {6th IEEE International Conference on Emerging Technologies and Factory Automation},
	pages = {pp. 1-27},
	organization = {UCLA}
}
@conference {
	title = {Adaptive Data Broadcast in Hybrid Networks},
	author = {Stathatos, Kostas., Roussopoulos, Nick., Baras, John S.},
	year = {1997},
	month = {08/1997},
	abstract = {With the immense popularity of the Web, the world is witnessing an unprecedented demand for data services. At the same time, the Internet is evolving towards an information super-highway that incorporates a wide mixture of existing and emerging communication technologies, including wireless, mobile, and hybrid networking. Taking advantage of these new technologies, we are proposing a hybrid scheme which effectively combines broadcast for massive data dissemination and unicast for individual data delivery. In this paper, we describe a technique that uses the broadcast medium for storage of frequently requested data~and an algorithm that continuously adapts the broadcast content to match the hot-spot of the database. We show that the hot-spot can be accurately obtained by the monitoring the "broadcast misses" observed through direct requests. This is a departure from other broadcast-based systems which rely on efficient scheduling based on precompiled user profiles. We also show that the proposed scheme performs effectively even under very dynamic and rapidly changing workloads. Extensive simulation results demonstrate both the scalability and versatility of the technique.},
	address = {Athens, Greece},
	booktitle = {Twenty\&ndash;third International Conference on Very Large Databases},
	pages = {pp. 326-335}
}
@conference {
	title = {Integrated Product and Process Design Environment Tool for Manufacturing T/R Modules},
	author = {Karne, Ramesh K., Baras, John S., Ball, Mike., Bashyam, Sridhar., Kebede, Abraham., Williams, James T., Trichur, Vinai., Karir, Manish., Lai, Hsing-Tsu., Dandekar, Swati V.},
	year = {1997},
	month = {08/1997},
	abstract = {We present a decision making assistant tool for integrated product and process design environment for manufacturing applications. Specifically, we target microwave modules which use Electro-mechanical components and require optimal solutions to reduce cost, improve quality, and gain leverage in time to market the product. This tool will assist the product and process designer to improve their productivity and also enable to cooperate and coordinate their designs through a common design interface. We consider a multiobjective optimization model that determines components and processes for a given conceptual designs for microwave modules. This model outputs a set of solutions that are Pareto optimal with respect to cost, quality, and other metrics. In addition, we identify system integration issues for manufacturing applications~and propose an architecture which will serve as a building block to our continuing research in virtual manufacturing applications.},
	address = {Montreal, Canada},
	booktitle = {Proceedings of the International Association of Management 15th Annual International Conference}
}
@conference {
	title = {Estimation of Hidden Markov Models for Partially Observed Risk Sensitive Control Problems},
	author = {Frankpitt, Bernard., Baras, John S.},
	year = {1997},
	month = {07/1997},
	abstract = {We look at the problem of estimation for partially observed, risk-sensitive control problems with finite state, input and output sets, and receding horizon. We describe architectures for risk-sensitive controllers, and estimation, and we state conditions under which both the estimated model converges to the true model, and the control policy will converge to the optimal risk sensitive policy.},
	address = {Cyprus, Greece},
	booktitle = {5th IEEE Mediterranean Conference on Control and Systems}
}
@conference {
	title = {Nonlinear Hoo Control with Delayed Measurements},
	author = {Baras, John S., Patel, Nital S.},
	year = {1997},
	month = {07/1997},
	abstract = {This paper considers the nonlinear H-infinity control problem for systems subject to delayed measurements. Necessary and sufficient conditions for the solvability of the problem are presented. A key point of our approach is the extension of the information state concept. In particular, the information state is no longer the "worse case cost to come" function. We also present the certainty equivalence principle for such systems, and draw an analogy with the solution to the linear case. The paper ends with an example.},
	address = {Brussels, Belgium},
	booktitle = {4th European Control Conference (ECC\&rsquo;97)}
}
@conference {
	title = {Hybrid Communication Networks for Video and Broadband Data Services},
	author = {Baras, John S.},
	year = {1997},
	month = {07/1997},
	address = {Alexandria, Egypt},
	booktitle = {Second IEEE Symposium on Computers and Communications}
}
@conference {
	title = {Identification of Noisy FM Signals Using Nonorthogonal Wavelet Transforms},
	author = {Teolis, Carole A., Baras, John S.},
	year = {1997},
	month = {04/1997},
	address = {Orlando, Florida},
	booktitle = {11th Annual SPIE International Symposium on Aerospace/Defense Sensing, Simulation and Controls},
	pages = {pp. 590-601}
}
@conference {
	title = {From Robust to Intelligent Control},
	author = {Baras, John S.},
	year = {1997},
	month = {03/1997},
	address = {Champaign, IL},
	booktitle = {Lecture in the Coordinated Sciences Laboratory},
	organization = {University of Illinois at Urbana{\textendash}Champaign}
}
@conference {
	title = {Tactical and Strategic Communication Network Simulation and Performance Analysis},
	author = {Baras, John S., Corson, Scott M., Doan, Khoa., Jang, Kap D., Liu, Mingyan., Misra, Archan., Xie, Hui.},
	year = {1997},
	month = {01/1997},
	abstract = {We describe a framework for the efficient modeling and performance evaluation of large networks consisting of a mixture of strategic and tactical components. The method emphasizes hierarchical, layered techniques that are fed parametric models at the lower level. In addition to the algorithmic structure, and some initial algorithms we describe an object-oriented software architecture that is under development to support these algorithmic methods in a distributed environment.},
	address = {College Park, MD},
	booktitle = {First ATIRP Annual Conference: Advanced Telecommunications/Information Distribution Research Program},
	pages = {pp. 343-347},
	organization = {University of Maryland}
}
@conference {
	title = {Performance Analysis of PNNI Routing in ATM Networks: Hierarchical Reduced Load Approximation},
	author = {Xie, Hui., Baras, John S.},
	year = {1997},
	month = {01/1997},
	abstract = {In this paper, we investigate the performance issue of PNNI routing for ATM networks. A brief introduction to PNNI routing protocol is given. We extend the reduced load approximation algorithm to ATM networks with PNNI routing. A hierarchical reduced load approximation scheme is proposed. The scheme includes two steps: the reduced load approximation algorithm is first applied on the aggregated network at upper level; then the approximation is refined at the lower level as needed using the results from the upper level. This hierarchical scheme follows the PNNI routing framework and results a fast and scaleable algorithm.},
	address = {Monterey, CA},
	booktitle = {MILCOM \&rsquo;97},
	pages = {pp. 998-1002}
}
