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Profiling job activities on different batch systems in the data center helps understand the patterns of usage by different users. With these patterns the system administrators in the data center are able to reorganize or rearrange their resources in a way that the overall resource utilization is improved. In this paper, we extract wall and CPU time from job accounting information on different batch...
With advances in wireless communication, wireless sensor networks are being deployed in various fields. A sensor network consists of hundreds or thousands of sensor nodes that involve numerous restrictions including computation capability and battery capacity. Accordingly, topology control is an important issue for achieving balanced placement of sensor nodes. The clustering scheme is a widely known...
Recently, methods that combine the concepts of Dynamic Voltage Scaling (DVS) and Dynamic Power Management (DPM) approaches have been proposed for a single task. This paper proposes Adaptive Power Management System (APMS), which utilizes useful features of both DPM and DVS and an existing pattern analysis algorithm, and new BET-based Task Partition Scheduling (BTPS). In order to determine the optimal...
The existing NAND flash memory file systems have not taken into account multiple NAND flash memories for large-capacity storage. To resolve these problems, this paper suggests a new file system called NAFS for large-capacity storage with multiple small-capacity NAND flash memories. It adopts a new cache policy and mount scheme in order to improve read and write performance and to reduce the mount...
This paper proposes a novel object-based virtual network middleware for supporting the interoperability among home devices and smart grid devices. In order to demonstrate that home devices and smart grid devices are interoperable through the proposed middleware, we implement applications based on the OVNet on a target platform consisting of embedded boards, sensors and laptops for emulation purposes...
A cyber physical systems (CPS) are deeply embedded systems that can be applied to home devices, medical equipments, cars, and etc. Since it is expected that a CPS system will be integrated with other CPSes designed for various areas to ultimately create a global CPS network covering a global network, IPv6 is suitable to these large-scaled integrated network environments. This paper proposes a hierarchical...
This paper suggests various schemes for a file system which is suitable for large-capacity storage with multiple NAND flash memories. The file system can be adopted by multimedia devices which require light non-volatile large storage.
This paper suggests a Break Even Time-based Adaptive Power Management System which partitions a multimedia data stream into a sequence of substreams. APMS shows good performance for multimedia applications which periodically access multimedia files.
This paper proposes an IPv6-based hierarchical middleware architecture for an efficient control of home devices on a global network from anywhere. This architecture can be adopted by mobile and home devices for smart home control.
Since the existing NAND flash memory file systems manage file data in page units, the memory usage increases greatly as the number and size of files increase, and the area to scan at the mounting time increases linearly as well. To resolve these problems, this paper suggests data management in segment units for more efficient processing of multimedia files to reduce memory usage and to improve reading...
This paper suggests a way to decrease memory usage through data management in segment units for the effective processing of multimedia files. In addition, it suggests a proper indexing structure and garbage collection method for multimedia files to improve performances of mounting and wear leveling.
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