반맹에서 반시야 문양 시유발전위와 빛간섭단층촬영과의 일치성

박성용,박상혁,하승주,박성희,Sung Yong Park,Sang Hyouk Park,Seung Joo Ha,Song Hee Park 대한안과학회 2008 대한안과학회지 Vol.49 No.11

Purpose: To analyze the correlation between RNFL thickness changes measured by OCT and hemifield pattern VEP in hemianopic visual field loss. Methods: Twelve eyes of six patients with hemianopia were studied. Two patients had bitemporal hemianopia caused by chiasmal tumor, one patient had inferior hemianopia caused by traumatic optic neuropathy, and three patients had homonymous hemianopia caused by occipital lobe lesions. The retinal nerve fiber layer thickness around the optic disc was measured by optical coherence tomography (OCT) and visual pattern evoked potentials were measured using hemifield stimulations. Results: Normal eyes of traumatic optic neuropathy patients were excluded from the analysis. The retinal nerve fiber layer thickness as measured by OCT corresponded to the visual field defect in 9 of 11 eyes (81.8%) and the hemifield pattern VEP response corresponded to visual field defect in 7 of 11 eyes (63.6%). Conclusions: RNFL thickness measurement by OCT and hemifield PVEP are useful in evaluation of patients with hemianopia. However, they should be performed with caution, and compared with various clinical examinations because of their incomplete correlation with visual field defects. J Korean Ophthalmol Soc 2008;49(11):1819-1828

화산력-시멘트 혼합 바이오 블록의 미생물 생장 특성

박성용,박덕환,김현선,김정면,임현택,배수빈,김용성,Park, Sung-Yong,Park, Duck-Hwan,Kim, Hyun-Sun,Kim, Jung-Myeon,Lim, Hyun-Taek,Bae, Su-Bin,Kim, Yong-Seong 한국농공학회 2015 한국농공학회논문집 Vol.57 No.1

This research aims to utilize lapilli from the Mt. Baekdusan as environmently-friendly construction material. First of all, the neutralizing method for fabricating lapilli-cement-mixed bioblock was examined. And then, by use of the neuralized bioblock with microorganism for water purification, the growth inhibition effect against the pathogenic coliform bacillus was evaluated. The result regarding growth inhibition effect on pathogenic coliform bacillus indicates that the pretreatment condition, which is a concurrent procession with aqueous solution of 10% di-ammonium Phosphate after water curing, led to pH degraded below 10 which was the target value. Therefore it was concluded that the method was effective on bio-block neutralization. The microorganisms purifying water and di-ammonium phosphate were detected through the examination for microorganism existence on the bioblock, therefore it was concluded that the bioblock composed of lapilli and cement is able to be utilized in various structures as an environment friendly construction material.

지역난방 급탕공급 부하균등화를 위한 잠열축열조의 현장 적용

박성용,유호선,Park, Sung Yong,Yoo, Hoseon 한국플랜트학회 2021 플랜트 저널 Vol.17 No.2

지역난방의 운영적 측면에서 특정시간의 피크부하 완화를 통한 효율적인 열생산과 공급 및 지역난방 공급 중단 시 급탕 공급은 난방 대비 대체가 어려워 사용자 측면의 불편함과 공급자 측면의 애로사항을 해결할 수 있는 적용 기술이 요구되고 있다. 본 연구에서는 이러한 문제점을 해결할 수 있는 기술 중 열저장 능력과 급탕공급에 적합한 78℃급 수화물계 잠열축열조를 제작하여 지역난방 사용자 아파트 급탕공급설비에 현장 적용하였다. 본 시스템의 적용 결과 기존 공급방식 대비 급탕온도의 변화가 거의 없이 일정하게 사용자에게 공급됨을 확인하였으며, 피크 열부하는 평균 35% 감소와 비상열원으로서의 활용 가능성을 확인하였다. 또한 부하균등화에 따른 피크부하 감소로 기존 열 공급시설에서 10%의 열공급 여유와 신규 열공급시설 건설비용 및 열사용자의 공사비부담금이 각 5%와 10%가 감소됨을 확인하였다. In terms of district heating operation, efficient production and supply of heat by alleviating the peak load at a specific time require an application technology that can solve the inconvenience of the user and the difficulties of the supplier. In this study, a 78 ℃ class PCM heat storage tank suitable among the technologies that can solve these problems was manufactured and applied to the hot water supply facility for apartments in district heating users. As a result of the application of this system, it was confirmed that the supply temperature was constant to the user compared to the existing supply method. In addition, it was confirmed that the reduction of the peak load due to load equalization reduced the heat supply margin of 10% in the existing heat supply facility. And the construction cost of the new heat supply facility and the construction cost of heat users is decreased by 5% and 10%, respectively.

현장 굴착 실험을 통한 사면붕괴 거동 연구

박성용,정희돈,김영주,김용성,Park, Sung-Yong,Jung, Hee-Don,Kim, Young-Ju,Kim, Yong-Seong 한국농공학회 2017 한국농공학회논문집 Vol.59 No.5

Recently, the occurrence of landslides has been increasing over the years due to the extreme weather event. Developments of landslides monitoring technology that reduce damage caused by landslide are urgently needed. Therefore, in this study, a strain ratio sensor was developed to predict the ground behavior during the slope failure, and the change in surface ground displacement was observed as slope failed on the field model experiment. As a result, in the slope failure, the ground displacement process increases the risk of collapse as the inverse displacement approaches zero. It is closely related to the prediction of precursor. In all cases, increase in displacement and reverse speed of inverse displacement with time was observed during the slope failure, and it is very important event for monitoring collapse phenomenon of risky slopes. In the future, it can be used as disaster prevention technology to contribute in reduction of landslide damage and activation of measurement industry.

수치해석에 의한 노후저수지의 침투 및 동적거동

박성용,장석현,임현택,김정면,김용성,Park, Sung-Yong,Chang, Suk-Hyun,Lim, Hyun-Taek,Kim, Jung-Meyon,Kim, Yong-Seong 한국농공학회 2016 한국농공학회논문집 Vol.58 No.3

It is significant to redevelop the deterioration reservoir through raising for countermeasure to climate change and Earthquake improvement of reservoir. This study aims to investigate the behavior of deterioration reservoir with poor-fabricated core subjected to raising water level and earthquake using numerical analysis. From the analysis results, water level raising and earthquakes induce crack and subsidences at the crown and the front side of deterioration reservoir. For the reinforcement of the deterioration reservoir is required appropriate measures method and raised method suitable, drainage and slope protection method judged to be necessary.

어항의 해양경찰 서비스 표준 모델 개발을 위한 기초 연구

박성용,이은방,주종광,진성용,Park, Seong-Ryong,Lee, Eun-Bang,Ju, Jong-Kwang,Jin, Sung-Yong 해양환경안전학회 2009 海洋環境安全學會誌 Vol.15 No.1

중 소형 어항에서 한정된 해양경찰자원으로 수요자 중심의 고품질 해양경찰 서비스를 제공할 수 있는 현장 서비스 표준 모델 개발을 목적으로 어업관련 업무를 영역별로 분석하고 어업종사자의 친숙도를 조사하였다. 또한 표본항으로 녹동항을 선정하여 해양경찰 파출소에 대한 치안수요와 업무량을 정량적으로 분석하고 업무성취도를 도출하였다. 시사점과 분석결과를 바탕으로 어항 현장 업무 표준 모형을 구성하고 역할중심 조직인 해양경찰대 조직구성과 업무 수요량 기반 자원방안을 제안하였다. 또한 수요자의 만족도 제고와 업무성취도 향상을 위한 교육프로그램을 제시하였다. In order to develop the standard service model of Korea Coast Guard at fishing port, which responses to the demand of users and provides them with the high quality service of maritime administration, the services performed by a branch of KCG are analyzed and the level of familiarity with them are investigated. The degree of affair achievement is quantitatively standardized by assessing the workload of branch office. The standard model of affairs is formatted and the programs of organization, resource operation and education are proposed.

유리체강내 트리암시놀론 주사시 트리암시놀론 용적에 따른 안압상승 양상

박성용,최경식,Sung Yong Park,M,D,Kyung Seek Choi,M,D 대한안과학회 2008 대한안과학회지 Vol.49 No.4

Purpose: To assess whether a 4 mg/0.05 ml intravitreal triamcinolone acetonide injection can reduce the IOP elevation compared to conventional 4 mg/0.1 ml injection. Methods: A retrospective case study was performed in 48 patients (48 eyes) who received intravitreal triamcinolone acetonide injection and who had a minimum follow-up time of six months. Patients were randomly assigned to receive 4 mg/0.1 ml or 4 mg/0.05 ml (24 patients in each group). Results: Before injection, mean IOP was 13.8±2.2 mmHg and 13.9±2.4 mmHg in the 0.1 ml and 0.05 ml group. The difference in IOP elevation between the two groups was statistically significant immediately after injection (P=0.000), one hour after injection (P=0.001), and one day after injection (P=0.000). After injection, the central macular thickness decreased significantly the of two groups. The difference of the central macular thickness decrease between both groups was not statistically significant. Conclusions: An intravitreal triamcinolone acetonide 4 mg/0.05 ml injection will more quickly reduce the IOP elevation in the early phase compared to 4 mg/0.1 ml injection, while providing a similar effect on the change of central macular thickness.

전립선암에 대한 초음파 영상유도 방사선치료의 Setup 오차 분석을 통한 재현성 평가

박성용,임승규,시명근,이지해,김종열,조은주,Park, Sung Yong,Lim, Seung Kyu,Si, Myoung Geun,Lee, Ji Hae,Kim, Jong Yeol,Cho, Eun Joo 대한방사선치료학회 2017 대한방사선치료학회지 Vol.29 No.2

목 적: 전립선암 환자에 대한 비침습적이고 피폭선량에 대한 부담이 없는 초음파를 이용한 영상유도방사선치료의 Setup 오차 분석을 통해 치료의 재현성을 평가해 보고자 한다. 대상 및 방법: 치료가 종료된 전립선암 환자 26명의 1,105영상에 대하여 앞-뒤(anterior-posterior, AP), 좌-우(right-left, RL), 위-아래(superior-inferior, SI) 방향의 Setup 오차에 대해 평균, 표준편차와 3D-error을 분석하였다. 또한 오차범위 0-1 mm, 1-3 mm, 3-5 mm, 5 mm 이상에 대한 각 오차 빈도수(frequency, %) 분석을 통하여 AP, RL, SI 방향에 대한 방향성을 확인 하였다. 결 과: Setup 오차는 AP, RL, SI 방향에 대하여 평균과 표준편차는 $1.87{\pm}1.36mm$, $1.73{\pm}1.22mm$, $2.01{\pm}1.40mm$였다. 3D-error는 평균 $3.63{\pm}1.63mm$였다. 각 방향에 대한 Setup 오차값의 빈도(frequency, %)는 AP 방향에 대한 오차범위 0-1 mm에서 29 %, 1-3 mm에서 50.2 %, 3-5 mm에서 19.6 %, 5 mm 이상에서 1.3 %였다. RL 방향에 대하여 오차범위 0-1 mm에서 31.3 %, 1-3 mm에서는 52.5 %, 3-5 mm에서는 15.8 %, 5 mm 이상에서 0.5 %였다. 마지막으로 SI 방향에 대한 오차범위 0-1 mm에서 26.3 %, 1-3 mm에서 50.2 %, 3-5 mm에서 22.4 %, 5 mm 이상에서 1.1 %였다. 결 론: Setup error는 SI 방향에서 $2.01{\pm}1.40mm$로 가장 컸으며 오차 빈도는 모든 방향에서 50 % 이상 오차 범위 1-3 mm에 들어온 것으로 확인되었다. $Clarity^{TM}$ Auto scan을 이용한 초음파영상유도 방사선치료는 치료 전에 방광의 전처치 상태, target의 구조 등을 관찰이 가능하고, 치료 중 target의 움직임을 실시간으로 monitoring하여 빠른 repositioning이 가능하다. 결과적으로 초음파를 이용한 실시간 영상유도방사선치료는 치료의 재현성을 높일 수 있을 것으로 사료된다. Purpose: To evaluate the reproducibility of image-guided radiotherapy using ultrasonography which is non-invasive, without radiation exposure for prostate cancer patients. Materials and Methods: We analyzed the setup variation of 1,105 images for 26 prostate cancer patients and the mean, standard deviation and 3D-error in AP, RL and SI directions. Setup variations were classified 0-1 mm, 1-3 mm, 3-5 mm, 5 mm and more. Results: The mean and standard deviation of setup variation in AP, RL and SI directions was $1.87{\pm}1.36mm$, $1.73{\pm}1.22mm$ and $2.01{\pm}1.40mm$. The 3D-error in AP, RL and SI directions was $3.63{\pm}1.63mm$. The frequency of setup variation in AP direction was 29 % in the range from 0 mm to 1 mm, 50.2 % in the range from 1 mm to 3 mm, 19.6 % in the range from 3 mm to 5 mm and 1.3 % in the range of 5 mm or more. In RL direction, the frequency was 31.3 % in the range from 0 mm to 1 mm, 52.5 % in the range from 1 mm to 3 mm, 15.8 % in the range from 3 mm to 5 mm and 0.5 % in the range of 5 mm or more. SI direction, the frequency of errors in the range from 0 mm to 1 mm was 26.3 %, 50.2 % in the range from 1 mm to 3 mm, 22.4 % in the range from 3 mm to 5 mm, and 1.1 % in the range of 5 mm or more. Conclusion: The setup error was highest in the SI direction of $2.01{\pm}1.40mm$. The frequency in each direction was the highest in more than 50 % in the range from 1 mm to 3 mm. $Clarity^{TM}$ Auto scan is possible to monitoring the motion of the prostate during the treatment and to repositioning the patient. In conclusion real-time image-guided radiotherapy using ultrasonography will be increase the reproducibility of radiation therapy.

유기 물질을 사용한 구리박막의 건식 식각에 대한 헥사플루오로이소프로판올 첨가의 영향

박성용,임은택,차문환,이지수,정지원,Park, Sung Yong,Lim, Eun Teak,Cha, Moon Hwan,Lee, Ji Soo,Chung, Chee Won 한국재료학회 2021 한국재료학회지 Vol.31 No.3

Dry etching of copper thin films is performed using high density plasma of ethylenediamine (EDA)/hexafluoroisopropanol (HFIP)/Ar gas mixture. The etch rates, etch selectivities and etch profiles of the copper thin films are improved by adding HFIP to EDA/Ar gas. As the EDA/HFIP concentration in EDA/HFIP/Ar increases, the etch rate of copper thin films decreases, whereas the etch profile is improved. In the EDA/HFIP/Ar gas mixture, the optimal ratio of EDA to HFIP is investigated. In addition, the etch parameters including ICP source power, dc-bias voltage, process pressure are varied to examine the etch characteristics. Optical emission spectroscopy results show that among all species, [CH], [CN] and [H] are the main species in the EDA/HFIP/Ar plasma. The X-ray photoelectron spectroscopy results indicate the formation of CuCN compound and C-N-H-containing polymers during the etching process, leading to a good etch profile. Finally, anisotropic etch profiles of the copper thin films patterned with 150 nm scale are obtained in EDA/HFIP/Ar gas mixture.

CO2 고정을 위한 Synechocystis sp . 성장에 관한 연구

박성용,김남기 ( Sung Yong Park,Nam Ki Kim ) 한국화학공학회 1995 화학공학의이론과응용 Vol.1 No.2