Kyoungdo Kim

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RTS (random telegraph signal)-like fluctuation in Gate Induced Drain Leakage (GIDL) current of Saddle-Fin (S-Fin) type DRAM cell transistor was investigated for the first time. Furthermore, two types of fluctuation which have apparently different &#x03C4;<inf>high</inf> (average time duration of high leakage state) to &#x03C4;<inf>low</inf> (average time(More)
To study trap models related to the variable retention time (VRT) phenomenon in dynamic random access memory (DRAM), we derived equations to calculate the data retention time t<sub>ret</sub> of DRAM and the activation energy for two trap models, i.e., the metastable and oxide trap models. Measuring the t<sub>ret</sub> of VRT cells for various bias and(More)
To study the relationship between the original leakage current fluctuation and the detected variable retention time (VRT) from the retention test of dynamic random access memory (DRAM), we simulated the real procedure of the VRT measurement of DRAM. By investigating the results of the simulation, we proposed a new effective VRT measurement method based on(More)
A series of novel J147 derivatives were synthesized, and their inhibitory activities against β-amyloid (Aβ) aggregation and toxicity were evaluated by using the oligomer-specific antibody assay, the thioflavin-T fluorescence assay, and a cell viability assay in the transformed SH-SY5Y cell culture. Among the synthesized J147 derivatives, 3j with a(More)
In recent years, there has been growing interest in the near-infrared (NIR) fluorescence imaging of tau fibrils for the early diagnosis of Alzheimer's disease (AD). In order to develop a curcumin-based NIR fluorescent probe for tau fibrils, structural modification of the curcumin scaffold was attempted by combining the following rationales: the curcumin(More)
Nowadays convergence of digital appliances meet both economic and practical demands of users. And current UI of the appliances not only provides interesting to users but also enhances convenience and accessibility. In this paper, we propose FRETEL (Face Recognition-Based Convergence Communicator with Internet Telephony) that is a new digital home appliance(More)
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