Mohammed Alhaddad - Academia.edu (original) (raw)
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Papers by Mohammed Alhaddad
The rapid growth in the size of databases and the advances made in Query Languages has resulted i... more The rapid growth in the size of databases and the advances made in Query Languages has resulted in increased SQL query complexity submitted by users, which in turn slows down the speed of information retrieval from the database. The future of high performance database systems lies in parallelism. Commercial vendors' database systems have introduced solutions but these have proved to be extremely expensive. This paper invistagete how networked resources such as workstations can be utilised by using Parallel Virtual Machine (PVM) to Optimise Database Query Execution. An investigation and experiments of the scalability of the PVM are conducted. PVM is used to implement parallelism in two separate ways: (i) Remove the work load for deriving and maintaining rules from the data server for Semantic Query Optimisation, therefore clears the way for more widespread use of SQO in databases [1,2]. (ii) Answer users queries by a proposed Parallel Query Algorithm PQA which works over a network of workstations, coupled with a sequential Database Management System DBMS called PostgreSql on the prototype called Expandable Server Architecture ESA [1,2,3,4]. Experiments have been conducted to tackle the problems of Parallel and Distributed systems such as task scheduling, load balance and fault tolerance.
Technology has become an inseparable part of everyday life, as we use it at home, at work, in sch... more Technology has become an inseparable part of everyday life, as we use it at home, at work, in school etc. For education, technology is frequently used as a tool to support classroom-based learning. However, an emerging challenge is the application of technology, beyond the traditional classroom, to a diverse mix of pedagogical techniques. Traditional education is based on the process of transmitting knowledge; however, it is necessary for education to encourage the formation and strengthening of skills such as creativity, innovation, analysis, communication and other capabilities that are important aspects of professional life. This paper extends our previous work towards developing an InterReality Portal learning environment. The InterReality Portal applies Problem-based Learning (PBL) pedagogy and co-creative learning to the realization of mixedreality laboratory activities for learning computing. To reach this goal we propose a series of structured lab activities created using IMS Learning Design, with a combination of Cross-Reality (xReality) and Virtual objects, to produce Internetof-Things-based computer projects using collaborative interaction between geographically dispersed students.
The rapid growth in the size of databases and the advances made in Query Languages has resulted i... more The rapid growth in the size of databases and the advances made in Query Languages has resulted in increased SQL query complexity submitted by users, which in turn slows down the speed of information retrieval from the database. The future of high performance database systems lies in parallelism. Commercial vendors' database systems have introduced solutions but these have proved to be extremely expensive. This paper invistagete how networked resources such as workstations can be utilised by using Parallel Virtual Machine (PVM) to Optimise Database Query Execution. An investigation and experiments of the scalability of the PVM are conducted. PVM is used to implement parallelism in two separate ways: (i) Remove the work load for deriving and maintaining rules from the data server for Semantic Query Optimisation, therefore clears the way for more widespread use of SQO in databases [1,2]. (ii) Answer users queries by a proposed Parallel Query Algorithm PQA which works over a network of workstations, coupled with a sequential Database Management System DBMS called PostgreSql on the prototype called Expandable Server Architecture ESA [1,2,3,4]. Experiments have been conducted to tackle the problems of Parallel and Distributed systems such as task scheduling, load balance and fault tolerance.
Technology has become an inseparable part of everyday life, as we use it at home, at work, in sch... more Technology has become an inseparable part of everyday life, as we use it at home, at work, in school etc. For education, technology is frequently used as a tool to support classroom-based learning. However, an emerging challenge is the application of technology, beyond the traditional classroom, to a diverse mix of pedagogical techniques. Traditional education is based on the process of transmitting knowledge; however, it is necessary for education to encourage the formation and strengthening of skills such as creativity, innovation, analysis, communication and other capabilities that are important aspects of professional life. This paper extends our previous work towards developing an InterReality Portal learning environment. The InterReality Portal applies Problem-based Learning (PBL) pedagogy and co-creative learning to the realization of mixedreality laboratory activities for learning computing. To reach this goal we propose a series of structured lab activities created using IMS Learning Design, with a combination of Cross-Reality (xReality) and Virtual objects, to produce Internetof-Things-based computer projects using collaborative interaction between geographically dispersed students.