• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.478-479
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• 2007

With increasing interest in the reduction of cost for operation and maintenance of overhead catenary system, various methods of condition monitoring have been developed. In this paper, we proposed network-based telemetry system for condition monitoring in railway and acquired data from any kind of sensor in catenary line and structure at high voltage. This development gives the solution for online condition monitoring in railway. To check the validity of our approach in terms of application, we realized network-based telemetry System.

• Proceedings of the KIEE Conference
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• 2001.11a
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• pp.29-31
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• 2001

본 논문에서는 고속철도 주변의 상용주파수(60 Hz) 대역의 전계 해석에 촛점을 두고 경계분할법의 일종인 전하중첩법과 표면전하법을 사용하여 선로주변의 전계 계산을 수행하였다. 계산 결과 지상 1m 열차 플랫폼 주변에서의 전계값은 0.5kV/m 이하로써 국제비전리방사보호위원회 (ICNIRP)의 권고 기준인 4.167kV/m를 충분히 만족함을 알 수 있었으며 사용자 편의를 위해 전계 해석용 프로그램을 윈도우 환경하에서 MFC를 이용하여 개발하였다.

• Proceedings of the KIEE Conference
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• 2001.11a
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• pp.231-233
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• 2001

본 논문에서는 고속철도 급전계통 주변에서 여러가지 운전 조건하의 자계를 예측 계산하였다. 여기에서는 자계해석 방법으로 Biot Savart's law에 기반을 둔 해석식을 사용하였으며 대지 귀환회로를 계산과정에 포함하여 실제에 가까운 모델링을 하였다. 계산결과 열차 주변 지상 1m 부근의 플랫폼에서 자계의 크기그하였으며, 국제비전리방사보호위원회(ICNIRP)의 자기장 권고기준과 비교하여 평가하였다.

• Journal of Environmental Science International
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• v.23 no.12
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• pp.2029-2034
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• 2014

To improve air quality around a broad way, Daegu Metropolitan city employed the clean-road system at a part of the broad way of Dalgubul (Daigubul-daero) in 2011. The clean-road system in general is operated two times (4 am, 2 pm) during summertime. In case of scorching alert, the system is operated 3 times a day (4 am, 2 pm and 4 pm). To evaluate the effect of air quality improvement due to the system, we analyzed the time variation of monthly mean particulate matter (PM10) concentration in recent 3 years (2011-2013). The improvement of air quality was estimated at about 5~15 % under the system.

• (The)Study of the Eastern Classic
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• no.48
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• pp.117-145
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• 2012

Gongsageunmunrok is a book that was edited by Jung Jae-ryun. He edited and chose some stories good enough to be an role model to descendants. There were all about 310 stories in that book. A forth of them is story about women. There were 4 types of women in the book. cautious women and women to see through a covered fact.Women who have a lot of authority, women who ask a man something, The women cautious women are generally a royal family. They tried to stabilize their royal family and nation. The way to stabilize was a good behavior. Women who have authority harms equitably and authenticity of official business. Requesting women, also, harm fairness of official business. Gongsageunmunrok has many different meanings like the following. First of all, There are women life of royal family's women in the book. Second, It is the book which can be based on later stories about women. Lee Geng-ik(李肯翊) rewrote on Yeunreusilgisul(燃藜室記述). Especially, Kim Reu rewrote the story titled 'Hansukwonjeon(韓淑媛傳)'. Sung Hae-eung,also, rewote Han Bo-hyang's story. Third, There are many stories with the life of court maid. It is useful to study all the life of court maid, political events and current events. Forth, It describes with women's aspects. Therefore many women's clique can be understood. Fifth, It can show women's literary work and a phase of women's literary activity.

• Journal of Environmental Science International
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• v.24 no.9
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• pp.1171-1180
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• 2015

To investigate thermal environment and effect of clean-road system over a broad way, we conducted the filed meteorological observation during 12~13 August 2014. The clean-road system was employed over a part of the broad way of Dalgubul(Dalgubul-Daero) by Daegu Metropolitan city in 2011. The clean-road system in general is operated two times(4 am, 2 pm) during summertime. In case of scorching alert, the system is operated 3 times a day(4 am, 2 pm and 4 pm). To evaluate the present thermal condition and the improvement effects due to the system, we analyzed the time variation of discomfort index and WBGT(wet-bulb and globe temperature). WBGT was more than 25 during 8 a.m. ~ 9 p.m. And discomfort index was more than 75 during 8 a.m. ~ 11 p.m. The thermal improvement effect of the clean-road system was restrictive during daytime.

• BMB Reports
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• v.45 no.5
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• pp.287-292
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• 2012

FGF-2 is involved in cell survival, proliferation, apoptosis, and angiogenesis in a wide variety of cells. FRGRs, PI3K and MAP kinases are well known mediators of FGF signaling. Despite its known roles during many developmental processes, including osteogenesis, there are few known targets of FGF-2. In the present study, we identified Bcl2-A1 and Bcl-xL as two prominent targets involved in promoting cell survival. Pretreatment of ATDC5 cells with FGF-2 increased cell survival, while siRNAs specific for Bcl2-A1 and Bcl-xL compromised the anti-apoptotic effect of FGF-2, sensitized the cells to apoptosis triggered by TNF-${\alpha}$. Chemical inhibition of FGFR, NFkB, and PI3K activity by PD173074, pyrrolidine dithiocarbamate, and LY294002 respectively abrogated the FGF-2-mediated induction of Bcl2-A1 and Bcl-xL expression. Taken together, our data demonstrate that a subset of Bcl2 family proteins are the targets of FGF-2 signaling that promotes the survival of ATDC5 cells.

• Journal of Conservation Science
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• v.27 no.1
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• pp.13-30
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• 2011

This study compared Pottery, Hwaecheongware, Buncheongware and Whiteware pieces excavated in Hakbong-ri of Chungnam analytically by observing their refined structures and estimating their firing temperature. As a result, base soil components of the specimens were mostly similar to those of typical Buncheongware, but the content of the fluxing agent was rather high, and it seemed that the Whiteware had been made with fairly different components from those of other sherds. Although the glaze showed less difference than base soil in general, the content of the glaze changed according to the decorating methods of Buncheongware. Based on the SEM-EDS analysis, it was found that the base soil components of the ceramics seemingly rather different were actually different and the analysis on the fine crystals of the base soil, the anorthite in the glaze and crystals in the ironing part, and the components and contents of white earth showed there were some noticeable points in the process of making each of the sherds. In the refiring experiment to estimate the firing temperature, mostly similar results were gained as $1150^{\circ}C$ to $1200^{\circ}C$ for pottery, $1100^{\circ}C$ to $1150^{\circ}C$ for Hwaecheongware, and $1100^{\circ}C$ to $1200^{\circ}C$ for iron-brown Buncheongware however, the results imply good quality Whiteware was burnt at above $1300^{\circ}C$ while bad quality Whiteware was burnt at a temperature far lower than that. Thus, there was clear difference between Whiteware sherds and other kinds of sherds.

• Journal of Food Hygiene and Safety
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• v.29 no.2
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• pp.146-151
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• 2014

This study was conducted to estimate the contents of heavy metals in salted vegetable foods from diverse origin in Korea which were sold in Korea. The levels of heavy metals were determined using an ICP-MS. The values of metals [minimum~maximum (mean), mg/kg] in kimchi were as follows; Pb 0.0~0.074(0.018), Cd 0.0~0.027 (0.004), As 0.0~0.024(0.002), Hg 0~0.002(0.0). The weekly average intakes of lead, cadmium, arsenic and mercury from kimchi take 0.06~0.13% PTWI (Provisional Tolerable Weekly Intakes) that the FAO/WHO Joint Food Additive and Contaminants Committee has set to evaluate their safeties.

• Korean Journal of Microbiology
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• v.47 no.1
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• pp.92-96
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• 2011

Rhodococcus sp. strain DK17 possesses three megaplasmids (380 kb pDK1, 330 kb pDK2, and 750 kb pDK3). The alkylbenzene-degrading genes (akbABCDEF) are present on pDK2 while the phthalate operons which are duplicated are present on both pDK2 (ophA'B'C'R') and pDK3 (ophABCR). DK17 with an optimal temperature of $30^{\circ}C$ showed no growth at $37^{\circ}C$. When transferred to $30^{\circ}C$, however, the $37^{\circ}C$ culture began to grow immediately, indicating that $37^{\circ}C$ is not lethal but stressful for DK17 growth. In addition, when exposed to $37^{\circ}C$ even for a short time, a part of DK17 cells lost the ability to degrade o-xylene (a model compound of alkylbenzenes). When two hundred colonies were randomly selected for colony PCR for pDK2-specific akbC, ophC', or pDK3-specific ophC, a total of 29 colonies were found to have lost at least one of the three genes. PFGE analysis clearly showed that all the mutants have different megaplasmid profiles from that of DK17 wild type, which are divided into five different cases: Type I (10 mutants, pDK2 loss and acquisition of a new ~700 kb plasmid), Type II (9 mutants, pDK2 loss), Type III (8 mutants, pDK3 loss and acquisition of a new ~400 kb plasmid), Type IV (1 mutant, pDK3 loss), and Type V (1 mutant, pDK2 and pDK3 loss and acquisition of the ~400 kb and ~700 kb plasmids). The above results showing that growth temperature changes can induce physical changes in bacterial genomes suggest that environmental changes in habitats including temperature fluctuations affect significantly the evolution of bacteria.