作者：
BOHM, SELHAKEEM, AKHACHICHA, MDepartment of Electrical and Computer Engineering
Concordia University 1455 De Maisonneuve Blvd. West Montreal H3A 1M8 Canada Was born in Montreal
Canada on 14 September 1966. He received the B. Eng. degree in electrical engineering from Concordia University Montreal Canada in 1989. He is at present completing the M.A.Sc. degree in electrical engineering at Concordia University. (S'75–S'79–M'79–SM'86) received the Ph.D. degree from Southern Methodist University
Dallas TX in 1979. He spent the next two years working as a Visiting Professor in Egypt after which he moved to Ottawa Canada in 1982. He assumed teaching and research positions in Carleton and Manitoba Univerities and later moved to Concordia University Montreal Canada in 1983 where he is now a Professor in the Electrical and Computer Engineering Department. He has published numerous papers in IEEE and international journals in the areas of spread spectrum and networking. He is a well-known expert in these areas and serves as a consultant to many companies. His current research interests include wide-band metropolitan networks switching architectures and performance of on-board multibeam satellites acquisitionless CDMA networks code distribution and orthogonalization of CDMA signals responsive congestion control for ATM-based networks ARQ techniques and investigation of the novel SUGAR CDMA systems in fading channels. Dr. Elhakeem is a Senior Member of the Canadian Electrical Engineering Society and Armed Forces Association. He has chaired numerous technical sessions in IEEE Conferences was the Technical Program Chairman for IEEE Montech 1986 Montreal Canada. Dr. Elhakeem is the key guest editor of theIEEE Journal of Selected Areas in Communicationsfor the May June issues 1993 covering CDMA networks. Advanced Technology & Networks
VISTAR Telecommunications Inc. Ottawa Ontario K1G 3J4 Canada An Associate Director of Advanced Technology & Networks Group
VISTAR Telecommunications Inc. Ottawa Canada. He is also an Adjunct Pr
In this paper, we study the performance of a prioritized on-board baseband switch in conjunction with a multibeam satellite handling integrated services. The services considered for the analysis include voice, video, ...
详细信息
In this paper, we study the performance of a prioritized on-board baseband switch in conjunction with a multibeam satellite handling integrated services. The services considered for the analysis include voice, video, file transfer and interactive data. The prioritized switch uses both input and output buffering, switch speed-up as well as a two-phase head-of-line resolution algorithm, in order to reduce the buffer loss while maintaining acceptable user delays. The minimum required buffer capacity and switch speed-up for each service in a prioritized environment are found under uniform traffic conditions. It is shown that under uniform traffic conditions, only minimal buffering and switch speed-up are needed even for the lowest priority users. The performance dependence on the switch size is also substantially reduced with head of line resolution and buffering even in a prioritized environment.
When analysing hard real-time systems for their performance properties, most scheduling models either ignore the timing characteristics of the underlying run-time support kernel entirely or have a very simple model of...
详细信息
We describe an unsupervised on-line method for learning of manipulative actions that allows a robot to push an object connected to it with a rotational point contact to a desired point in image-space. By observing til...
详细信息
A rigorous analysis of guided waves in dielectric waveguides with slanted gratings is presented for the general three-dimensional case of oblique propagation. The analysis is formulated in a unified matrix form so tha...
详细信息
A distributed multimedia information system should support retrieval of both static and time-dependent continuous media. The isochronous nature of continuous media imposes a very strict requirement on communication su...
详细信息
A distributed multimedia information system should support retrieval of both static and time-dependent continuous media. The isochronous nature of continuous media imposes a very strict requirement on communication support, in terms of bandwidth, delay and delay jitter. This paper first introduces a distributed hypermedia system (DHS) being developed. It shows that in order to support the retrieval of continuous media of arbitrary length, communication bandwidth, delay bound and delay jitter bound must be guaranteed. The authors then present experiences and results of their initial implementation of the system on UNIX workstations connected via Ethernet. Finally, they evaluate the suitability of the current platform and present their future work plan.
This paper presents a design for the use of DSM techniques and system-supported synchronisation to support shared access to persistent objects in a distributed environment. We adopt a hybrid approach where the system ...
详细信息
This paper presents a design for the use of DSM techniques and system-supported synchronisation to support shared access to persistent objects in a distributed environment. We adopt a hybrid approach where the system granularity is sometimes pages and sometimes objects. We are interested in providing shared access to small (i.e., less than a page) objects in a general purpose, language-independent environment, and supporting both DSM and RPC object access mechanisms.< >
Under current versions of the UNIX operating system, it is difficult to take advantage of the massive computing power of idle or lightly loaded workstations on a network. The authors introduce the ISIS resource manage...
详细信息
Transitive closure operation is an important extension to relational algebra. The two most well-known methods to compute transitive closure are naive and semi-naive approaches. We give the optimal parallel versions of...
详细信息
Transitive closure operation is an important extension to relational algebra. The two most well-known methods to compute transitive closure are naive and semi-naive approaches. We give the optimal parallel versions of these two algorithms by using double-hash relation distribution for SIMD meshes.< >
In this paper an attributed finite state machine (AFSM) model for the behavior specification of reactive systems is introduced. The basic idea is to attach attributes to the states of state machines in order to expres...
详细信息
暂无评论