가감대보탕(加減大補湯)이 백서(白鼠)의 갑상선기능저하증(甲狀腺機能低下症)에 미치는 영향(影響)

김용성,김철중,Kim, Yong-Seong,Kim, Cheul-Jung 대한한방내과학회 1994 大韓韓方內科學會誌 Vol.15 No.2

To study the effect of Kamidaebotang on the hypothyroidism induced by thiourea in SD(Splague Dawley) rats, the weight of thyroid gland, the level of serum $T_3\;and\;T_4$. total cholesterol, hematological changes and histopathological findings were measured. The following results were obtained. 1. Thyroid gland weight of the Kamidaebotang B treated group was significantly increased as compared with that of control group(p<0.05). 2. The level of serum $T_3$ of the Kamidaebotang B treated group was slightly increased as compared with that of control group. But no significant changes appeared between two groups. 3. The level of serum $T_4$ of the Kamidaebotang A, B treated groups were significantly increased as compared with that of control group(p<0.05). 4. Total cholesterol of the Kamidaebotang A, B treated groups were not significant changes as compared with that of control group. 5. Hematological data of the Kamidaebotang A, B treated groups were not significant changes as compared with that of control group. 6. Histopathologically, Kamidaebotang B administration recovered effectly the dystropy, degeneration of thyroid follicle induced by thiourea. From above results, it is suggested that Kamidaebotang B is available to the hypothyroidism induced by thiourea in rats. Therefore, Kamidabotang B seems to be applicable to hypothyroidism in clinical practice.

도시내 가로변 빌딩이 도로 이면지역의 소음에 미치는 영향

김용성,한찬훈,Kim, Yong-Seong,Haan, Chan-Hoon 한국음향학회 2019 韓國音響學會誌 Vol.38 No.3

가로변 이면지역에 위치한 노후된 공동주택은 주도로의 교통소음의 피해를 받는다. 이면지역의 소음은 가로면 건물의 높이와 주도로와의 이격거리, 그리고 도로변 건물간의 이격거리 및 도로변 건물간의 높이차이에 의하여 영향을 받는다. 본 연구는 한 도시 내의 15개의 블록을 선정하여 가로변 건물배치형태를 1)블록에 단일건물이 배치된형태, 2)블록에 다수의 건물이 하나의 축으로 연속하여 배치된 형태로 분류하였으며, 가로변과 이면지역에서 도로교통소음을 동시에 측정하여 가로변의 건물 배치형식에 따른 이면지역소음의 상관성을 분석하였다. 분석결과, 이면지역으로 전달된 도로교통소음은 가로변에 배치된 건물의 높이, 건물과 건물간의 이격된 거리, 인접한 건물의 높이차에 영향을 받으며 건물의 너비에 의한 소음도의 감소는 나타나지 않았다. 가로변에 위치한 건물의 높이가 4 m(단층)인 경우 이면지역의 소음도는 12 dB(A)감소하였으며 높이가 4 m 증가할 때마다 2 dB(A)씩 감소하는 것으로 나타났다. 또한 인접한 두 건물의 높이차가 4 m 증가할 때마다 이면지역의 소음도는 1 dB(A)씩 증가하였으며, 인접한 두 건물의 이격된 거리가 0.5 m 증가할 때마다 이면지역의 소음도는 1 dB(A)씩 증가하는 것으로 나타났다. The old residences and shops in the backside blocks are affected by the traffic noises from the main road. The noise of the backside roads is affected by the following factors such as the height of the roadside buildings, the distance between the road and the backside streets, distance among adjacent roadside buildings, and the difference of the adjacent building heights. The both noise levels on the road and the backside street were measured simultaneously in 15 urban blocks of a city which can be categorized into two types of roadside building plans ; 1) one single building along the street, 2) buildings arranged on one axis beside the road. As the results, there is no significant noise reduction due to the width of the buildings in general. However, in the cases of buildings arranged on one axis beside the road, it was found that the average noise reduction was 12 dB(A) on the basis of the building height of 4 m. Also, it was analysed that for each 4 m increase in the building height, noise reduction occurred by 2 dB(A) beyond building height of 4 m. In general, it was proved that the noise of the back streets is mainly affected by the lowest height of the roadside buildings. It was found that noise is increased by 1 dB(A) for each 4 m increase of the height difference between adjacent buildings. Also, It was revealed that for each 0.5 m increase in the distance between roadside building, noise reduction decreased by 1 dB(A).

고학력 청년층의 미취업 원인과 정책적 대응방안: 일자리 탐색이론을 중심으로

김용성,Kim, Yong-seong 한국개발연구원 2012 韓國 開發 硏究 Vol.34 No.3

최근까지 정부의 많은 정책적 노력에도 불구하고 미취업 청년층의 문제는 해결하여야 할 중요한 과제로 남아 있다. 본 연구의 목적은 우리나라 고학력 청년층 미취업의 원인을 분석하고 개선을 위한 정책방향을 모색하는 데 있다. 노동 수요와 공급의 측면에서 분석하던 기존의 연구와는 달리 본 연구는 구인과 구직의 일자리 탐색과정에 초점을 맞추었다는 점에서 차별성이 있다. 구체적으로 미취업 시 소득과 일자리의 제안확률의 변화가 청년층 노동시장에 미치는 효과에 대하여 이론적 모형을 소개하고 실증적 분석을 실시한 결과, 미취업 시 소득이 낮아지거나 일자리 제안확률이 높아질 경우 모두 평균 미취업기간을 단축시킬 것으로 예상되었다. 그러나 정책대상의 구체성과 정책의 효과성(target efficiency) 측면에 비추어 볼 때 미취업 청년층에 대한 노동수요를 유인하는 정책을 통하여 일자리 기회를 확대하고 이를 취업으로 연결시키는 고용지원서비스의 기능을 강화하는 방향으로 정책의 역량을 모아 나가는 것이 바람직한 것으로 판단된다. Despite continuous efforts of the government, youth joblessness in Korea has remained as a top policy priority. At this end, the study focuses on the causes of youth labor market problems and tries to seek for policy directions. While the previous research attempted to explain youth joblessness based on the labor demand and supply, this study follows a job search model which emphasizes a job matching process. A theoretical model and empirical results predict that a mean duration of unemployment could decrease if an implicit income of unemployment declines or a rate of job offer rises. From policy point of view, it is advisable to raise incentives for labor demand and to strengthen employment services because a policy to lower an implicit income of unemployment may not secure policy target efficiency.

매립 지반에서의 지진파 증폭 특성

김용성,김기영,전제성,Kim Yong-seong,Kim Ki-Young,Jeon Je-Sung 한국농공학회 2005 한국농공학회논문집 Vol.47 No.5

In this study, borehole records were analyzed to verify the amplification of seismic motion at the soft reclaimed ground before and after the main event of the 1995 Hyogoken Nambu Earthquake at Port Island, Japan. From the analysis, it was shown that the amplification of seismic motion occurred near the soft ground surface (within 30 m below) where confining stress is low. Moreover, it was found that recovery of dynamic soil stiffness at the liquefied ground began gradually 3 hours after the liquefaction and completed in 10 days, when the ground exhibited the same seismic motion characteristics as those before the liquefaction.

Challenge Zone_소중한 당신의 체중계_스트레스 버려야 살도 빠진다 - 비만인 이유 스트레스 때문에

김용성,Kim, Yong-Seong 한국건강관리협회 2012 건강소식 Vol.36 No.5

6H-SiC 위에 형성한 에피택시 AIN 박막 구조에 대한 전기적 특성의 평가온도 의존성

김용성,김광호,Kim Yong-Seong,Kim Kwang-Ho 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.1

Epitaxial aluminum nitride films on 6H-SiC (0001) were fabricated using reactive RF magnetron sputtering and post-deposition rapid thermal annealing. The electrical properties of AIN films depending on film thickness and measurement temperature have been observed. Full width at half maximum of AIN (0002) was $0.1204^{\circ}$ (about 430 arcsec) X-ray rocking curve results. The equivalent oxide thickness (EOT) of AIN film was estimated as about 10 nm and the leakage current density was within the order of $10^{-8} 4/cm^2$. The dielectric constant of AIN film estimated from the accumulation region of C-V curve measured at $300^{\circ}C$ was 8.3. The dynamic dielectric constant was obtained as 5.1 from J vs. 1/T plots at the temperature ranging from R.T. to $300^{\circ}C$ From above, estimation temperature dependance of the electrical properties of Al/AIN/SiC MIS devices was affirmed and useful data compilation for the reliabilities of SiC MIS is expected.

모세관 젤 전기영동을 이용한 안드로젠 수용체 유전자 분석

김용성,백승권,강충무,강대천,이수만,최병옥,정기화,최규성,Kim, Yong-Seong,Baek, Seung-Gwon,Gang, Chung-Mu,Gang, Dae-Cheon,Lee, Su-Man,Choe, Byeong-Ok,Jeong, Gi-Hwa,Choe, Gyu-Seong 대한화학회 2006 대한화학회지 Vol.50 No.1

연구에서는 모세관 젤 전기 영동에서 분자체 역할을 하는 poly(ethylene oxide)를 이용하여 남성불임(Androgen receptor) 유전자의 정확한 CAG 반복 배열의 길이를 측정하였다. 표준물질인 X174 RF/Hae III, 100bp step ladder를 이용하여 non-linear regression analysis를 통한 81명의 한국의 불임 남성과 89명의 정상적인 한국 남성을 대조군으로 하여, 남성 불임과 관련된 AR gene의 exon 1의 CAG 반복 수를 측정하였다. 불임 남성의 CAG 반복 길이는 24.97±2.6 range, 17-29)이고, 정상인 남성은 23.99±2.4(range, 18-29)이다. P값은 0.018로써(<0.05) 두 그룹의 결과는 통계학적으로 주목 할 수 있는 차이를 나타내었다. gel electrophoresis (CGE) with poly(ethylene oxide) has been applied to the measurement of CAG repeat number in Androgen receptor (AR) gene related to male infertility. Non-linear regression analysis was performed using the standard X174 RF/Hae III, 100bp step ladder DNA in order to investigate the exact number of CAG repeat. For 79 Korean infertile males and 89 controls, CAG repeats at exon 1 in AR gene was compared and analyzed by CGE. It turned out that CAG repeat numbers were 24.972.6 range, 17-29) for the infertile male, and 23.992.4 range, 18-29) for the control, respectively. P value (0.018) was less then 0.05, meaning that the result was statistically meaningful.

반응성 RF 마그네트론 스퍼터링 법을 이용한 AIN/SiC 구조의 제작 및 특성

김용성,김광호,Kim, Yong-Seong,Kim, Kwang-Ho 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.11

Al/AlN/n-type 6H-SiC (0001) MIS structures were prepared by AlN layers on vicinal 6H-SiC(0001) substrates with reactive RF magnetron sputtering method. The AlN films were annealed at $900^{\circ}C$, $N_2$ atmosphere lot 1 minutes showed the best result. With XRD analysis, AlN(0002) peak was clearly found. The typical dielectric constant value of the AlN film in the MIS capacitors was obtained as 8.4 from photo C-V. Also, the gate leakage current density of the MlS capacitor was $10^{-10}\;A/cm^2$ order within the electric field of 1.8 MV/cm. Finally, the amount of interface trap densities, $D_{it}$, was evaluated as $5.3\times10^{10}\;eV^{-1}cm^{-2}$ at (Ec-0.85) eV.

Cyclic Strength and Deformation Characteristics of Marine Cohesive Soil

김용성,서민우,오상은,Kim, Yong-Seong,Seo, Min-Woo,Oh, Sang-Eun The Korean Society of Agricultural Engineers 2012 한국농공학회논문집 Vol.54 No.3

본 연구에서는 해성 점성토에 대하여 반복 삼축시험을 실시하고 응력-변형률 관계 및 유효응력경로 특성 분석을 통해 동적 변형 및 강도 특성을 조사하였다. 시험에 사용된 시료는 일본 도쿠시마현의 코마츠시마 항 인근에서 채취된 점성토이며, 반복 삼축시험으로 동적 비배수 삼축시험, 동적 비배수 삼축시험 후 동적 삼축변형시험, 다단계 동적 비배수 삼축시험, 동적 삼축 변형시험 등 4종류의 시험을 수행하고, 시험 주파수로서 0.1 및 0.01 Hz을 적용하였다. 본 연구 결과 0.01 Hz로 수행된 동적 삼축시험 결과는 0.1 Hz로 수행된 삼축시험 결과보다 평균유효응력의 감소량이 크며, 반복 하중은 해성 점성토의 구조적 약화를 초래하고 초기 거동시 발생하는 간극수압과 밀접하게 관련이 있는 것으로 나타났다. 또한 미소변형률 영역에서 등가 탄성계수는 시험 횟수가 증가함에 따라 점차 감소하며, 감쇠비는 점차 증가하는 것으로 보아 변형계수는 반복 하중으로 인한 전단변형률의 축척에 따른 변형률 의존 거동에 관련하는 것으로 판단된다.

점성토의 점탄성 특성을 고려한 층상지반의 지진응답특성

김용성,Kim, Yong-Seong 한국농공학회 2011 한국농공학회논문집 Vol.53 No.3

In order to estimate the viscous effects of clay over a wide range of strain levels, we confirmed the performance of a viscoelastic-viscoplastic constitutive model by simulating cyclic undrained triaxial tests to determine the cyclic strength and deformation characteristics of natural marine clay. The viscoelastic-viscoplastic constitutive model was then incorporated into an effective stress-based seismic response analysis to estimate the effects of an intermediate clay layer on the behavior of sand layers. Seismic response was simulated by the cyclic viscoelastic-viscoplastic constitutive model created with data recorded at Rokko Island, Kobe, Japan. The results show that a cyclic viscoelastic-viscoplastic constitutive model can provide a good description of dynamic behavior including viscoelastic effects, within a small strain range.