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이민수,조숙행,한선호,서광윤,이병윤 大韓神經精神醫學會 1981 신경정신의학 Vol.20 No.2
To provide data on the clinical issues related to the birth order and other characteristic background in epilepsy, 331 idiopathic epileptic patients were evaluated and analyzed phenomenologically. The patients had been treated at the neuropsychiatric department of the Korea University Hospital during 1974 to 1980. The age at onset ranged from 1 to 45 years, with the mean age of 16.65 years. Males were 1.36 times more than females. Seventeen (5.13%) of the subjects had the family history of epilepsy. Attacks in the daytime only occurred in 67.67% (N=224) of the subjects, while 23.56% (N=78) had their seizures only at night, and 8.77% (N=20) had their seizures both at daytime and night. Grand mal was the most frequent type of seizure, followed by psychometer and petit mal. There was a higher incidence among the first born than the subsequent siblings and the children born second had a somewhat higher frequency of epilepsy than the subsequent children.
Joe, Kihsoo,Han, Sun-Ho,Song, Byung-Chul,Lee, Chang-Heon,Ha, Yeong-Keong,Song, Kyuseok Korean Nuclear Society 2013 Nuclear Engineering and Technology Vol.45 No.3
A determination method for $^{237}Np$ in spent nuclear fuel samples was developed using an isotope dilution method with $^{239}Np$ as a spike. In this method, inductively coupled plasma mass spectrometry (ICP-MS) was taken for the $^{237}Np$ instead of the previously used alpha spectrometry. $^{237}Np$ and $^{239}Np$ were measured by ICP-MS and gamma spectrometry, respectively. The recovery yield of $^{237}Np$ in synthetic samples was $95.9{\pm}9.7$% (1S, n=4). The $^{237}Np$ contents in the spent fuel samples were 0.15, 0.25, and $1.06{\mu}g/mgU$ and these values were compared with those from ORIGEN-2 code. A fairly good agreement between the measurements (m) and calculations (c) was obtained, giving ratios (m/c) of 0.93, 1.12 and 1.25 for the three PWR spent fuel samples with burnups of 16.7, 19.0, and 55.9 GWd/MtU, respectively.
The factors associated with Vitamin D deficiency in community dwelling elderly in Korea
Sun Hea Kim,Jung Eun Oh,Dong Won Song,Choo Yon Cho,Sung Ho Hong,Yong Jin Cho,Byung Wook Yoo,Kyung Suk Shin,Hyun Joe,Hwang Sik Shin,Doo Yong Son 대한지역사회영양학회 2018 Nutrition Research and Practice Vol.12 No.5
BACKGROUND/OBJECTIVE: Recent studies showed vitamin D deficiency is linked to chronic diseases in addition to skeletal metabolism which could threaten the elderly. We analyzed health conditions and socio-demographic factors associated with vitamin D deficiency in community dwelling people aged 65 years and older. SUBJECTS/METHOD: Data from the Korea National Health and Nutrition Examination Survey (KNHANES) 2010 to 2012 were obtained. A total of 2,687 subjects aged 65 years and older were participated. The cutoff value of the Vitamin D deficiency was considered as serum 25-hydroxyvitamin D [25(OH)D] ≤ 20 ng/mL (50 n㏖/L). RESULTS: The overall prevalence rate of vitamin D deficiency in the elderly was 62.1%. The factors such as female, obesity, metabolic syndrome, current smoker, and skipping breakfast were positively associated with vitamin D deficiency, but high intensity of physical activity and more than 9 hours of sleep duration were negatively associated with vitamin D deficiency (all P < 0.05). CONCLUSIONS: It is important that health professions know that the factors proved in this study are connected to vitamin D deficiency thus provide information and intervention strategies of vitamin D deficiency to old aged people.
Joe, Kih-Soo,Song, Byung-Chul,Kim, Young-Bok,Jeon, Young-Shin,Han, Sun-Ho,Jung, Euo-Chang,Song, Kyu-Seok Korean Nuclear Society 2009 Nuclear Engineering and Technology Vol.41 No.2
The contents of transuranic elements ($^{237}Np$, $^{238}Pu$, $^{239}Pu$, $^{240}Pu$, $^{241}Am$, $^{244}Cm$ and $^{242}Cm$) in high-burnup spent fuel samples ($35.6{\sim}53.9\;GWd/MtU$) were determined by alpha spectrometry. Anion exchange chromatography and diethylhexyl phosphoric acid extraction chromatography were applied for the separation of these elements from the uranium matrix. The measured values of the nuclides were compared with ORIGEN-2 calculations. For plutonium, the measurements were higher than the calculations by about $2.6{\sim}32.7%$ on average according to each isotope, and those for americium and curium were also higher by about $35.9{\sim}63.1%$. However, for $^{237}Np$, the measurements were lower by about 52% on average for the samples.
Joe, Kih-Soo,Song, Byung-Chul,Kim, Young-Bok,Jeon, Young-Shin,Han, Sun-Ho,Jung, Euo-Chang,Song, Kyu-Seok Korean Nuclear Society 2009 Nuclear Engineering and Technology Vol.41 No.1
The contents of transuranic elements ($^{237}Np$, $^{238}Pu$, $^{239}Pu$, $^{240}Pu$, $^{241}Am$, $^{244}Cm$, and $^{242}Cm$) in high-burnup spent fuel samples ($35.6{\sim}53.9\;GWd/MtU$) were determined by alpha spectrometry. Anion exchange chromatography and diethylhexyl phosphoric acid extraction chromatography were applied for the separation of these elements from the uranium matrix. The measured values of the nuclides were compared with ORIGEN-2 calculations. For plutonium, the measurements were higher than the calculations by about $2.6{\sim}32.7%$ on average according to each isotope, and those for americium and curium were also higher by about $35.9{\sim}63.1%$. However, for $^{237}Np$, the measurements were lower by about 52% on average for the samples.
Joe, Kih-Soo,Song, Byung-Chul,Kim, Young-Bok,Han, Sun-Ho,Jeon, Young-Shin,Jung, Euo-Chang,Jee, Kwang-Yong Korean Nuclear Society 2007 Nuclear Engineering and Technology Vol.39 No.5
The contents of transuranic elements in high-burnup spent fuel samples were determined. The activity amounts of $^{238}Pu,\;^{239}Pu,\;^{240}Pu,\;^{241}Am,\;^{244}Cm\;and\;^{242}Cm$ were measured by alpha spectrometry using $^{242}Pu\;and\;^{243}Am$ as tracers, respectively. A spike addition method for $^{237}Np$ was established by an alpha and gamma spectrometry using $^{239}Np$ as a spike after the optimum conditions for the measurements of $^{237}Np\;and\;^{239}Np$, respectively, were obtained. A separation system using anion exchange chromatography and diethylhexylphosphoric acid extraction chromatography was applied for the separation of these elements. This method was applied to high-burnup spent nuclear fuel samples $(40{\sim}60GWD/MTU)$. The contents of the transuranic elements were compared with those by ORIGEN-2 code. Measurements and the calculations of the contents of the plutonium isotopes $^{238}Pu,\;^{239}Pu\;and\;^{240}Pu$ agreed to within 10% on average. The contents of $^{237}Np$ agreed to within approximately 5% except for one instance of a calculation, while those of $^{241}Am,\;^{244}Cm\;and\;^{242}Cm$ showed higher values by approximately 19%, 35% and 14% on average, respectively, compared to the calculations according to the burnup.
Myoung-Sun Lee,Sung-Min Joe,Jang-Gn Yun,Hyungcheol Shin,Byung-Gook Park,Sang-Sik Park,Jong-Ho Lee 대한전자공학회 2012 Journal of semiconductor technology and science Vol.12 No.3
The causes of showing different subthreshold slopes (SS) in programmed and erased states for two different charge trap flash (CTF) memory devices, SONOS type flash memory with gate-all-around (GAA) structure and TANOS type NAND flash memory with planar structure were investigated. To analyze the difference in SSs, TCAD simulation and low-frequency noise (LFN) measurement were fulfilled. The device simulation was performed to compare SSs considering the gate electric field effect to the channel and to check the localized trapped charge distribution effect in nitride layer while the comparison of noise power spectrum was carried out to inspect the generation of interface traps (NIT). When each cell in the measured two memory devices is erased, the normalized LFN power is increased by one order of magnitude, which is attributed to the generation of NIT originated by the movement of hydrogen species (h<SUP>*</SUP>) from the interface. As a result, the SS is degraded for the GAA SONOS memory device when erased where the NIT generation is a prominent factor. However, the TANOS memory cell is relatively immune to the SS degradation effect induced by the generated NIT.
The factors associated with Vitamin D deficiency in community dwelling elderly in Korea
Kim, Sun Hea,Oh, Jung Eun,Song, Dong Won,Cho, Choo Yon,Hong, Sung Ho,Cho, Yong Jin,Yoo, Byung Wook,Shin, Kyung Suk,Joe, Hyun,Shin, Hwang Sik,Son, Doo Yong The Korean Nutrition Society 2018 Nutrition Research and Practice Vol.12 No.5
BACKGROUND/OBJECTIVE: Recent studies showed vitamin D deficiency is linked to chronic diseases in addition to skeletal metabolism which could threaten the elderly. We analyzed health conditions and socio-demographic factors associated with vitamin D deficiency in community dwelling people aged 65 years and older. SUBJECTS/METHOD: Data from the Korea National Health and Nutrition Examination Survey (KNHANES) 2010 to 2012 were obtained. A total of 2,687 subjects aged 65 years and older were participated. The cutoff value of the Vitamin D deficiency was considered as serum 25-hydroxyvitamin D [25(OH)D] ${\leq}20ng/mL$ (50 nmol/L). RESULTS: The overall prevalence rate of vitamin D deficiency in the elderly was 62.1%. The factors such as female, obesity, metabolic syndrome, current smoker, and skipping breakfast were positively associated with vitamin D deficiency, but high intensity of physical activity and more than 9 hours of sleep duration were negatively associated with vitamin D deficiency (all P < 0.05). CONCLUSIONS: It is important that health professions know that the factors proved in this study are connected to vitamin D deficiency thus provide information and intervention strategies of vitamin D deficiency to old aged people.
Lee, Myoung-Sun,Joe, Sung-Min,Yun, Jang-Gn,Shin, Hyung-Cheol,Park, Byung-Gook,Park, Sang-Sik,Lee, Jong-Ho The Institute of Electronics and Information Engin 2012 Journal of semiconductor technology and science Vol.12 No.3
The causes of showing different subthreshold slopes (SS) in programmed and erased states for two different charge trap flash (CTF) memory devices, SONOS type flash memory with gate-all-around (GAA) structure and TANOS type NAND flash memory with planar structure were investigated. To analyze the difference in SSs, TCAD simulation and low-frequency noise (LFN) measurement were fulfilled. The device simulation was performed to compare SSs considering the gate electric field effect to the channel and to check the localized trapped charge distribution effect in nitride layer while the comparison of noise power spectrum was carried out to inspect the generation of interface traps ($N_{IT}$). When each cell in the measured two memory devices is erased, the normalized LFN power is increased by one order of magnitude, which is attributed to the generation of $N_{IT}$ originated by the movement of hydrogen species ($h^*$) from the interface. As a result, the SS is degraded for the GAA SONOS memory device when erased where the $N_{IT}$ generation is a prominent factor. However, the TANOS memory cell is relatively immune to the SS degradation effect induced by the generated $N_{IT}$.