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—In this paper, we present an efficient flash file system for flash memory storage. Flash memory, especially NAND flash memory, has become a major method for data storage. Currently, a block level translation interface is required between an existing file system and flash memory chips due to its physical characteristics. However, the approach of existing(More)
Conventional prefetching schemes regard prediction accuracy as important because useless data prefetched by a faulty prediction may pollute the cache. If prefetch-ing requires considerably low read cost but the prediction is not accurate, it may or may not be beneficial depending on the situation. However, the problem of low prediction accuracy can be(More)
In this paper, we present the scalable and efficient flash file system using the combination of NAND and Phase-change RAM (PRAM). Until now, several flash file systems have been developed considering the physical characteristics of NAND flash. However, previous flash file systems still have a high performance overhead and a scalability problem of the(More)
In this paper, we propose a new technique, called a delayed locking technique, to improve the real-time performance of embedded Linux. The proposed technique employs the rule that entering a critical section is allowed only if the operation does not disturb the future execution of the real-time application. To execute this rule, we introduce the concepts of(More)
The ability to record and keep account of the usage of cloud resources in a credible and verifiable way is a precursor to widespread cloud deployment and availability because usage information is potentially sensitive and must be verifiably accurate. In an attempt to provide a mutually verifiable resource usage and billing mechanism, we found that the(More)
Background and aims: The Korean Hereditary Tumor Registry has proposed criteria for suspected hereditary nonpolyposis colorectal cancer (S-HNPCC criteria I and II) and confirmed their validity in an international collaborative study. The S-HNPCC criteria included families that did not fulfill the Amsterdam criteria, but in whom HNPCC was nevertheless(More)
One of the most widely used wireless communication standards is a Wireless Local Area Network (WLAN) (IEEE 802.11). However, WLAN has a serious power consumption problem. In this paper, we propose a novel energy saving approach that exploits the multiradio feature of recent mobile devices equipped with WLAN and Bluetooth interfaces. Unlike previous(More)