F.: 2004, ‘Continuous Query Processing in Spatio-temporal Databases (2009)
Mohamed F. Mokbel, Xiaopeng Xiong, Moustafa A. Hammad, Walid G. Aref
Abstract. The tremendous increase in the use of cellular phones, GPS-like devices, and RFIDs results in highly dynamic environments where objects as well as queries are continuously moving. In this...
Analyzing the Effects of Hyper-threading on the Performance of Data Management Systems (2008)
Wessam M. Hassanein, Layali K. Rashid, Moustafa A. Hammad
Abstract ◊ As information processing applications take greater roles in our everyday life, database management systems (DBMSs) are growing in importance. DBMSs have traditionally exhibited poor...
Thanaa M. Ghanem, Thanaa M. Ghanem, Moustafa A. Hammad, Mohamed F. Mokbel, Walid G. Aref, Ahmed K
Seeking a position in Computer Science to utilize my experience in the following areas: systemsoriented research and implementation, databases, data stream management systems, continuous query...
Multimedia Systems VDBMS: A Testbed Facility for Research in Video Database Benchmarking (2008)
Walid G. Aref, Ann C. Catlin, Ahmed K. Elmagarmid, Jianping Fan, Moustafa A. Hammad, F. Ilyas, ...
Abstract Real world video-based applications require database technology that is capable of storing digital video in the form of video databases and providing content-based video search and...
Elisa Bertino, Moustafa A. Hammad, Walid G. Aref, Ahmed K. Elmagarmid
A novel approach for modeling access control in video databases is presented. The proposed access control mechanism uses both the semantics and the structural composition of video data. The unit of...
Characterizing the Performance of Data Management Systems on Hyper-Threaded Architectures (2006)
Wessam M. Hassanein, Moustafa A. Hammad, Layali Rashid
Abstract ◊ As information acquisition and processing applications take greater roles in our everyday life, database management systems are growing in importance. Database management systems have...
Incremental Evaluation of Sliding-Window Queries over Data Streams (2006)
Thanaa M. Ghanem, Moustafa A. Hammad, Mohamed F. Mokbel, Walid G. Aref, Ahmed K. Elmagarmid
Two research efforts have been conducted to realize sliding-window queries in data stream management systems, namely, query re-evaluation and incremental evaluation. In the query re-evaluation...
Incremental Evaluation of Sliding-Window Queries over Data Streams (2006)
Thanaa M. Ghanem, Moustafa A. Hammad, Mohamed F. Mokbel, Walid G. Aref, Senior Member, Ahmed K. Elmagarmid, ...
Abstract—Two research efforts have been conducted to realize sliding-window queries in data stream management systems, namely, query reevaluation and incremental evaluation. In the query...
Incremental Evaluation of Sliding-Window Queries over Data Streams (2006)
Thanaa M. Ghanem, Moustafa A. Hammad, Mohamed F. Mokbel, Walid G. Aref, Senior Member, Ahmed K. Elmagarmid, ...
Abstract—Two research efforts have been conducted to realize sliding-window queries in data stream management systems, namely, query reevaluation and incremental evaluation. In the query...
Efficient Broadcast Schedulers of Hierarchical Data Dissemination Systems (2005)
Omotayo, Adesola, Hammad, Moustafa A., Barker, Ken
With the increasing popularity of portable wireless devices and the need to access data anytime and anywhere, mechanisms to efficiently and effectively transmit information to wireless clients are of...
Efficient Broadcast Schedulers of Hierarchical Data Dissemination Systems (2005)
Omotayo, Adesola, Hammad, Moustafa A., Barker, Ken
With the increasing popularity of portable wireless devices and the need to access data anytime and anywhere, mechanisms to efficiently and effectively transmit information to wireless clients are of...
Efficient Broadcast Schedulers of Hierarchical Data Dissemination Systems (2005)
Omotayo, Adesola, Hammad, Moustafa A., Barker, Ken
With the increasing popularity of portable wireless devices and the need to access data anytime and anywhere, mechanisms to efficiently and effectively transmit information to wireless clients are of...
Optimizing in-order execution of continuous queries over streamed sensor data (2005)
In this paper we study the problem of providing ordered execution of time-based sliding window queries over input streams of sensor data with inherent delays. We present three approaches to achieve...
Optimizing in-order execution of continuous queries over streamed sensor data (2005)
The widespread use of sensor networks in scientific and engineering applications leads to increased demand on the efficient computation of the collected sensor data. Recent research in sensor and...
Query processing in stream database systems (2004)
The processing of data streams plays a central role in emerging applications such as pervasive computing, sensor-based environments, and on-line business processing. Such applications receive...
Continuous Query Processing in Spatiotemporal Databases (2004)
Mohamed F. Mokbel, Xiaopeng Xiong, Moustafa A. Hammad, Walid G. Aref
The tremendous increase of cellular phones, GPS-like devices, and RFIDs results in highly dynamic environments where objects as well as queries are continuously moving. In this paper, we present a...
PLACE: A Query Processor for Handling Real-time Spatio-temporal Data Streams (Demo (2004)
Mohamed F. Mokbel, Xiaopeng Xiong, Walid G. Aref, Susanne E. Hambrusch, Sunil Prabhakar, Moustafa A. Hammad
The emergence of location-aware services calls for new real-time spatio-temporal query processing algorithms that deal with large numbers of mobile objects and queries. In this demo, we present PLACE...
PLACE: A Query Processor for Handling Real-time Spatio-temporal Data Streams (2004)
Mohamed F. Mokbel, Xiaopeng Xiong, Walid G. Aref, Susanne E. Hambrusch, Sunil Prabhakar, Moustafa A. Hammad
The emergence of location-aware services calls for new real-time spatio-temporal query processing algorithms that deal with large numbers of mobile objects and queries. In this demo, we present PLACE...
Continuous Query Processing in Spatiotemporal Databases (2004)
Mohamed F. Mokbel, Xiaopeng Xiong, Moustafa A. Hammad, Walid G. Aref
The tremendous increase in the use of cellular phones, GPS-like devices, and RFIDs re-sults in highly dynamic environments where objects as well as queries are continuously mov-ing. In this paper, we...
Stream Window Join: Tracking Moving Objects in Sensor-Network Databases (2003)
Moustafa A. Hammad, Walid G. Aref
The widespread use of sensor networks presents revolutionary opportunities for life and environmental science applications. Many of these applications involve continuous queries that require the...
Scheduling for Shared Window Joins Over Data Streams (2003)
Moustafa A. Hammad, Michael J. Franklin, Walid G. Areff, Ahmed K. Elmagarmid
Continuous Ouery (CO) systems typically exploit commonality among query expressions to achieve improved efficiency through shared processing. Recently proposed CO systems have introduced window...
Stream Window Join: Tracking Moving Objects in Sensor-Network Databases (2003)
Moustafa A. Hammad, Walid G. Aref, Ahmed K. Elmagarmid
The widespread use of sensor networks presents revolutionary opportunities for life and environmental science applications. Many of these applications involve continuous queries that require the...
A Video Database Management System for Advancing Video Database Research (2002)
Walid G. Aref, Ann C. Catlin, Jianping Fan, Ahmed K. Elmagarmid, Moustafa A. Hammad, Ihab F. Ilyas, ...
The most useful environments for advancing research and development in video databases are those that provide complete video database management, including (1) video preprocessing for content...