The paper focuses on coastal fisheries, particularly examining sea turtle-fishery interactions an... more The paper focuses on coastal fisheries, particularly examining sea turtle-fishery interactions and determining the socioeconomic profile and perception of local fishers about sea turtle issues along the East Coast of Peninsular Malaysia.
ICONIP '02. Proceedings of the 9th International Conference on Neural Information Processing. Computational Intelligence for the E-Age (IEEE Cat. No.02EX575), 2002
Abstract A furnace process recipe for nitride film deposition to minimize any back-stream of part... more Abstract A furnace process recipe for nitride film deposition to minimize any back-stream of particle or gas by-products on the wafers, impact of out-gassing from chamber materials and gas turbulence in the chamber at any time during the process has been developed. The ...
2011 11th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, 2011
In this paper we characterize the behavior with respect to memory locality management of scientif... more In this paper we characterize the behavior with respect to memory locality management of scientific computing applications running in virtualized environments. NUMA locality on current solutions (KVM and Xen) is enforced by pinning virtual machines to CPUs and providing NUMA aware allocation in hypervisors. Our analysis shows that due to two- level memory management and lack of integration with page reclamation mechanisms, applications running on warm VMs suffer from a "leakage" of page locality. Our results using MPI, UPC and OpenMP implementations of the NAS Parallel Benchmarks, running on Intel and AMD NUMA systems, indicate that applications observe an overall average performance degradation of 55% when compared to native. Runs on "cold" VMs suffer an average performance degradation of 27%, while subsequent runs are roughly 30% slower than the cold runs. We quantify the impact of local- ity improvement techniques designed for full virtualization environments: hypervisor level page remapping and partitioning the NUMA domains between multiple virtual machines. Our analysis shows that hypervisor only schemes have little or no potential for performance improvement. When the programming model allows it, system partitioning with proper VM and runtime support is able to re-produce native performance: in a partitioned system with one virtual machine per socket the average workload performance is 5% better than native.
In this paper, we present a light-weight position verification technique for VANETs. Our techniqu... more In this paper, we present a light-weight position verification technique for VANETs. Our technique supplemen ts the received signal strength (RSSI) technique with a laser rangefinder to reduce the inaccuracy incurred in the RSSI. We used our new position verification technique to tighten the security in CASCADE (Cluster-based Accurate Syntactic Compression of Aggregated Data in VANETs) data aggregation technique. The
Proceedings of 2011 International Conference for High Performance Computing, Networking, Storage and Analysis on - SC '11, 2011
Live migration is a widely used technique for resource consolidation and fault tolerance. KVM and... more Live migration is a widely used technique for resource consolidation and fault tolerance. KVM and Xen use iterative pre-copy approaches which work well in practice for commercial applications. In this paper, we study pre-copy live migration of MPI and OpenMP scientific applications running on KVM and present a detailed performance analysis of the migration process. We show that due to
Abstract. Tamper-evident and tamper-resistant systems are vital to support applications such as d... more Abstract. Tamper-evident and tamper-resistant systems are vital to support applications such as digital right management and certified grid computing. Recently proposed schemes, such as XOM and AEGIS, as-sume trusting processor state only to build secure systems. ...
The paper focuses on coastal fisheries, particularly examining sea turtle-fishery interactions an... more The paper focuses on coastal fisheries, particularly examining sea turtle-fishery interactions and determining the socioeconomic profile and perception of local fishers about sea turtle issues along the East Coast of Peninsular Malaysia.
ICONIP '02. Proceedings of the 9th International Conference on Neural Information Processing. Computational Intelligence for the E-Age (IEEE Cat. No.02EX575), 2002
Abstract A furnace process recipe for nitride film deposition to minimize any back-stream of part... more Abstract A furnace process recipe for nitride film deposition to minimize any back-stream of particle or gas by-products on the wafers, impact of out-gassing from chamber materials and gas turbulence in the chamber at any time during the process has been developed. The ...
2011 11th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, 2011
In this paper we characterize the behavior with respect to memory locality management of scientif... more In this paper we characterize the behavior with respect to memory locality management of scientific computing applications running in virtualized environments. NUMA locality on current solutions (KVM and Xen) is enforced by pinning virtual machines to CPUs and providing NUMA aware allocation in hypervisors. Our analysis shows that due to two- level memory management and lack of integration with page reclamation mechanisms, applications running on warm VMs suffer from a "leakage" of page locality. Our results using MPI, UPC and OpenMP implementations of the NAS Parallel Benchmarks, running on Intel and AMD NUMA systems, indicate that applications observe an overall average performance degradation of 55% when compared to native. Runs on "cold" VMs suffer an average performance degradation of 27%, while subsequent runs are roughly 30% slower than the cold runs. We quantify the impact of local- ity improvement techniques designed for full virtualization environments: hypervisor level page remapping and partitioning the NUMA domains between multiple virtual machines. Our analysis shows that hypervisor only schemes have little or no potential for performance improvement. When the programming model allows it, system partitioning with proper VM and runtime support is able to re-produce native performance: in a partitioned system with one virtual machine per socket the average workload performance is 5% better than native.
In this paper, we present a light-weight position verification technique for VANETs. Our techniqu... more In this paper, we present a light-weight position verification technique for VANETs. Our technique supplemen ts the received signal strength (RSSI) technique with a laser rangefinder to reduce the inaccuracy incurred in the RSSI. We used our new position verification technique to tighten the security in CASCADE (Cluster-based Accurate Syntactic Compression of Aggregated Data in VANETs) data aggregation technique. The
Proceedings of 2011 International Conference for High Performance Computing, Networking, Storage and Analysis on - SC '11, 2011
Live migration is a widely used technique for resource consolidation and fault tolerance. KVM and... more Live migration is a widely used technique for resource consolidation and fault tolerance. KVM and Xen use iterative pre-copy approaches which work well in practice for commercial applications. In this paper, we study pre-copy live migration of MPI and OpenMP scientific applications running on KVM and present a detailed performance analysis of the migration process. We show that due to
Abstract. Tamper-evident and tamper-resistant systems are vital to support applications such as d... more Abstract. Tamper-evident and tamper-resistant systems are vital to support applications such as digital right management and certified grid computing. Recently proposed schemes, such as XOM and AEGIS, as-sume trusting processor state only to build secure systems. ...
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