Seungjo Bae

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Wireless sensor networks are rapidly emerging as an important area in ubiquitous computing industry. They are very tiny devices with limited energy, memory, transmission range, and computation power. So, wireless sensor networks are vulnerable to security attack such as sinkhole attack, wormhole attack, and simple power exhaustion attack. However, wireless(More)
Vector prefix and reduction are collective communication primitives in which all processors must cooperate. We present two parallel algorithms, the direct algorithm and the split algorithm, for vector prefix and reduction computation on coarse-grained, distributed-memory parallel machines. Our algorithms are relatively architecture independent and can be(More)
System virtualization come into the spotlight again with the emerging virtual machine (VM) technologies (e.g., Parallels, VMware and Xen). With these market trends toward virtual environments, many research groups are developing evaluation tools to check the performance of virtual systems and their overheads. However, the performance characterization in(More)
In High Performance Fortran (HPF) array combining scatter functions are generalized array reduction functions. Elements in a subset of a source array are combined and the resulting value is sent to a position in a resulting array. Array combining scatter function can be de ned in terms of random access write (RAW). In this paper we present several local and(More)
The main objective of this work is to implement the Multivari approach along with Design of Experiment (DOE) framework to effectively benchmark the hypervisors over heterogeneous workloads. Multivari approach determines the interaction effect very easily for many factors at a time by keeping panel parameter constant. This experiment has given a very(More)
We present experimental results for parallelizing two breadth-first search-based applications on Thinking Machines CM-5 by using two different message-passing paradigms, one based onsend/receive and the other based onactive messages. The parallelization of these applications requires fine-grained communication. Our results show that the active(More)
In High Performance Fortran (HPF) array combining scatter functions are generalized array reduction functions. Elements in a subset of a source array are combined and the resulting value is sent to a position in a resulting array. Array combining scatter function can be de ned in terms of random access write (RAW). In this paper we present several local and(More)
A new dynamic LOD system is recently proposed to represent fairly large artificial terrains using hierarchical triangular patches[5]. Its mesh structure is unique from other conventional methods because it is designed to reduce the total number of draw primitive calls in a frame rather than the number of primitives. Another distinctive feature is its(More)
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