Hee-Sung Kim

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Accumulating evidence indicates that glial cells are actively involved in the pathogenesis of Alzheimer's disease. We recently reported protective effects of long-term administration of ferulic acid against learning and memory deficit induced by centrally administered beta-amyloid peptide (Abeta)1-42 in mice. In that report, we found that the(More)
Sepsis represents a major cause of death in intensive care units. Here we show that administration of lysophosphatidylcholine (LPC), an endogenous lysophospholipid, protected mice against lethality after cecal ligation and puncture (CLP) or intraperitoneal injection of Escherichia coli. In vivo treatment with LPC markedly enhanced clearance of(More)
A phosphatase and tensin homolog (PTEN) has been known to play multiple biological roles. However, role of PTEN in astrocyte activation is not clear yet. In the present study, the expression pattern of PTEN in the process of reactive gliosis was immunohistochemically examined in intracerebroventricular (i.c.v.) injected kainic acid mouse hippocampus. Mice(More)
As the usage of the real time authentication system increases, more reliable methods of personal identification are needed to be developed. One of the preferred characteristics of human body is the palmar features. The geometrical shapes of the hands or the palmar lines are not changed throughout one's lifetime except special cases. We propose a method by(More)
Low bone mineral density (BMD) is common in HIV-infected patients. We aimed to describe the prevalence of low BMD and risk factors in Korean HIV-infected patients and to assess the effects of antiretroviral therapy (ART) on BMD. We retrospectively evaluated 224 HIV infected-patients. The prevalence of osteopenia and osteoporosis were 41.5% and 12.9%. These(More)
We recently reported that continuous exposure, for 8 weeks, of extremely low frequency (ELF) magnetic field (MF) of 0.1 or 0.5 mT might induce testicular germ cell apoptosis in BALB/c mice. In that report, the ELF MF exposure did not significantly affect the body weight or testicular weight, but significantly increased the incidence of testicular germ cell(More)
This paper presents an approach for hand tracking which is based on color and motion. In particular, the YCbCr color system and the difference of the two consecutive frames of images are considered for detection of a moving hand. Since the luminance component is concentrated in Y, while the chrominance components are in Cb and Cr, the image region in which(More)
This paper proposes a new methodology to improve location-sensing accuracy in wireless network environments eliminating the effects of non-line-of-sight errors. After collecting bulks of anonymous location measurements from a wireless network, the preparation stage of the proposed methodology begins. Investigating the collected location measurements in(More)
To develop a flexible indoor localization system which is hardware independent, it is necessary to accommodate the diversity of mobile units in the installed WLAN infrastructure. The diversity of mobile units induces the diversity of signal reception bias terms. To deal with the signal reception bias, this paper proposes an extended signal propagation model(More)
In this paper, the performance of the wireless-signal map-matching method under a code division multiple access network environment is demonstrated. The wireless-signal map-matching method is the key step to implement the recently introduced wireless location technology referred to as the localization exploring network measurement occurrences. The(More)