Sungmin Park

Learn More
While NAND flash memory is used in a variety of end-user devices, it has a few disadvantages, such as asymmetric speed of read and write operations, inability to in-place updates, among others. To overcome these problems, various flash-aware strategies have been suggested in terms of buffer cache, file system, FTL, and others. Also, the recent development(More)
Most mobile devices are equipped with a NAND flash memory even if it has characteristics of not-in-place update and asymmetric I/O latencies among read, write, and erase operations: write/erase operations are much slower than a read operation in a flash memory. For the overall performance of a flash memory system, the buffer replacement policy should(More)
As more and more data are generated in an electronic format, the necessity of data recovery service became larger and the development of more efficient data backup and recovery technology has been an important issue during the past decade. While lots of effective backup and recovery technologies, including data dedeplication and incremental backup, have(More)
The RNA-binding protein HuR stabilizes labile mRNAs carrying AU-rich instability elements. This mRNA stabilization can be induced by hypoxia, lipopolysaccharide, and UV light. The mechanism by which these stimuli activate HuR is unclear and might be related to post-translational modification of this protein. Here we show that HuR can be methylated on(More)
Although structural, biochemical, and genetic studies have provided much insight into the determinants of specificity and affinity of proteins for RNA, little is currently known about the kinetics that underlie RNA-protein interactions. Protein-RNA complexes are dynamic, and the kinetics of binding and release could influence many processes, such as the(More)
BACKGROUND Lymphoepithelioma-like carcinoma (LELC) is a rare type of gastric carcinoma and has histologic features of intense lymphocytic infiltration. In this study, we attempted to analyze the clinicopathologic characteristics and survival outcome of patients with LELC compared with those with non-lymphoepithelioma-like carcinoma (NLELC). METHODS We(More)
A woodpecker is known to drum the hard woody surface of a tree at a rate of 18 to 22 times per second with a deceleration of 1200 g, yet with no sign of blackout or brain damage. As a model in nature, a woodpecker is studied to find clues to develop a shock-absorbing system for micromachined devices. Its advanced shock-absorbing mechanism, which cannot be(More)