U3Si2 판형핵연료판 우라늄 균질도 검사용 표준시편 제조를 위한 연구

송화영,박경민,김호민,김성환,정용진 대한기계학회 2024 大韓機械學會論文集A Vol.48 No.4

한국원자력연구원에서 제조하고 있는 U3Si2 판형핵연료판은 내부 우라늄 심재가 알루미늄 피복재로 덮여 있는 구조이며 다양한 비파괴검사 통해 완성한다. 그 중 X-ray 투과율을 수치적으로 표현한 gray level 값으로 판형핵연료판 내부 우라늄 영역의 균질도 검사를 진행하고 있다. 그러나 위 gray level이 X-ray의 미세한 변화와 실험실 내 환경적인 이유로 매번 조금씩 바뀌기 때문에 피검사물과 동시에 X-ray 촬영될 수 있는 별도의 표준시편이 필요하다. 따라서 본 연구에서는 감손 우라늄을 이용해 표준시편을 제작하였다. 모든 검사공정을 합격한 U3Si2 판형핵연료판 우라늄 심재영역의 평균 gray level과 가장 유사한 영역을 절단하여 제조하였다. 전자현미경(SEM) 분석을 통해 5.213 gU/cc U-loading량을 확인하였으며, 재검증을 통해 gray level 오차 수준을 기존의 5%에서 1%로 감소하는 효과를 확인하였다. The U3Si2 plate-type fuel plate manufactured by the KAERI has an internal uranium meat covered with an aluminum cladding and is completed via various non-destructive tests. The homogeneity of the uranium meat inside the U3Si2 plate-type fuel plate is inspected under the gray level expressed numerically based on the X-ray transmittance. Because the gray level changes gradually each time owing to slight X-ray changes and the environmental conditions in the laboratory, a separate standard that can be inspected simultaneously with the subject is required. In this study, a standard is produced using depleted uranium. The standard is manufactured by cutting an area whose gray level is the most similar to the average gray level of the uranium meat of a U3Si2 plate-type fuel plate that passes all inspections. Based on SEM analysis, 5.213 gU/cc of U-loading is confirmed, and the effect of reducing the gray level error from 5% to 1% is confirmed through retest.

Balloon angioplasty in a pediatric renal artery occlusion

송화영,정혜두,김정은,이상민,홍원주,이관섭 대한영상의학회 2018 대한영상의학회지 Vol.79 No.6

Renal artery injury is a rare complication in blunt trauma, but can cause devascularization of the kidney, leading to renal failure. It requires early diagnosis and management. The treatment of renal artery injury still remains controversial, but recent studies have reported the successful treatment outcome with endovascular stent placement. Nevertheless, there is no standard treatment strategy in cases of pediatric patients. We report a case of a 16-year-old girl with right renal artery occlusion associated with a grade IV liver laceration. She was treated with only balloon angioplasty, and the kidney showed marked improvement of parenchymal perfusion with normalized renal function. Treatment with only balloon angioplasty can be a treatment option in pediatric patients with renal artery injury.

한국수자원공사 한강사업본부

송화영 한국수자원학회 1996 물과 미래(한국수자원학회지) Vol.29 No.4

Risk Factors of Cryptogenic Hepatocellular Carcinoma in Patients with Low Body Mass Index or without Metabolic Syndrome

송화영,이효근,이준성,김종연,임윤혁,송태준,배원기,김남훈,김경아 대한내과학회 2012 The Korean Journal of Internal Medicine Vol.27 No.1

Background/Aims: Many patients are diagnosed with cryptogenic hepatocellular carcinoma (HCC) without metabolic syndrome (MS). We investigated the risk factors for cryptogenic HCC in patients with a low body mass index (BMI) or without MS. Methods: Thirty-six patients were diagnosed with cryptogenic HCC over a 10-year period at a tertiary research hospital. Data including BMI score and risk factors for MS were analyzed retrospectively. Patients with fewer than two risk factors for MS (n = 16) were compared with those with two or more risk factors (n = 20). Patients with high BMI (≥ 23 kg/m2, n = 20) were also compared with those with lower BMI (n = 16). Results: Patients with fewer than two risk factors for MS were significantly more likely to smoke and be hepatitis B surface antibodies (anti-HBs)-positive vs. patients with two or more risk factors. However, only smoking was statistically significant on multivariate analysis. Peaks of BMI were observed in two regions. Lower BMI was significantly associated with the presence of anti-HBs compared with high BMI, although this association was not statistically significant on multivariate analysis. Conclusions: Smoking is a potential risk factor for cryptogenic HCC in patients without MS. Remote hepatitis B virus infection may be a risk factor for cryptogenic HCC in patients without MS or with a low BMI. Background/Aims: Many patients are diagnosed with cryptogenic hepatocellular carcinoma (HCC) without metabolic syndrome (MS). We investigated the risk factors for cryptogenic HCC in patients with a low body mass index (BMI) or without MS. Methods: Thirty-six patients were diagnosed with cryptogenic HCC over a 10-year period at a tertiary research hospital. Data including BMI score and risk factors for MS were analyzed retrospectively. Patients with fewer than two risk factors for MS (n = 16) were compared with those with two or more risk factors (n = 20). Patients with high BMI (≥ 23 kg/m2, n = 20) were also compared with those with lower BMI (n = 16). Results: Patients with fewer than two risk factors for MS were significantly more likely to smoke and be hepatitis B surface antibodies (anti-HBs)-positive vs. patients with two or more risk factors. However, only smoking was statistically significant on multivariate analysis. Peaks of BMI were observed in two regions. Lower BMI was significantly associated with the presence of anti-HBs compared with high BMI, although this association was not statistically significant on multivariate analysis. Conclusions: Smoking is a potential risk factor for cryptogenic HCC in patients without MS. Remote hepatitis B virus infection may be a risk factor for cryptogenic HCC in patients without MS or with a low BMI.

지방사립대학의 폐교에 따른 발전 방안과 활용방안에 관한 연구 - A 대학교의 중심으로 -

송화영,한군희,신승수 대한산업경영학회 2022 산업융합연구 Vol.20 No.4

The decrease in the school-age population caused the closure of private universities, but the guidelines at closed private universities are ambiguous, causing confusion. Therefore, this study intends to suggest a plan to utilize the closed school university. The government aims to increase the possibility of selling closed schools by preventing alley slums through the recovery of alley commercial districts and local communities. The data were collected through a Google survey from September 30 to October 8, 2021 and an on-site interview conducted on October 2, 2021. A total of 84 nearby citizens of the closed school university were surveyed, and on-site interviews were conducted with a total of five people. The collected data suggested the direction of utilization plan for closed school building. This study will present a model for the use of closed school property in the future and contribute to the establishment of urban regeneration policies. 지방 소도시 쇠퇴에 따른 학령인구 감소는 사립대학의 폐교를 야기하며 관련 법령 및 지침이 모호하여 혼란을 겪고 있다. 이에 본 연구는 폐교대학의 활용방안을 제시하고자 한다. 대학 폐교로 경제적 어려움을 겪고 있는 골목상권과 지역공동체 회복을 통해 골목 슬럼화 방지를 통해 폐 교대학의 매각 가능성을 높이고자 한다. 자료는 2021년 9월 30일부터 10월 8일까지 구글 설문조사와 10월 2일 실시한 현장 인터뷰를 통해 수집하였다. 설문조사의 대상자는 폐교대학의 인근 시민 총 84명이었고, 현장 인터뷰는 폐교대학 출신 2명과 지역거주민 3명 총 5명과 진행하였다. 수집된 자료는 폐교 건물의 활용방안에 대한 도출방향을 제시하였다. 이 연구는 차후 폐교재산의 활용 모델을 제시하고 도시재생 정책의 수립에 기여 할 것이다.

Staphylococcus epidermidis에 의한 자연판막 심내막염 1례

송화영,장우익,곽이경,김민,조종래,엄태현 대한감염학회 2009 Infection and Chemotherapy Vol.41 No.5

Although Staphylococcus epidermidis is a frequent cause of prosthetic valve endocarditis (PVE), it is regarded as a rare pathogen of native valve endocarditis (NVE). We report a case of NVE caused by methicillin-resistant S. epidermidis in a 62-year-old man. The bacterium was isolated from blood and tissue culture. The patient underwent valve replacement due to heart failure and was successfully treated by surgery and vancomycin administration for 7 weeks.

원산지별 헤이즐넛의 지방산 분석

송화영,권민희,정상미,정봉환,박찬우,라문진 강원대학교 농업생명과학연구원 2021 강원 농업생명환경연구 Vol.33 No.-

Hazelnut plays a pivotal role in human nutrition and health due to its essential unsaturated fatty acids (FA). The composition of hazelnuts needs to be standardized in different regions for their mass production. In the present study, we compared the compositions of FA that are used as the index components in hazelnuts harvested from various provinces of Korea such as Gochang, Bonghwa, Hongcheon, and Cheorwon. This was also compared for each manufacturing process including raw material, degreasing, roasting, oil refining, and oil foil. The FA was extracted from the hazelnuts using Bligh-Dyer method, and was analyzed via gas chromatography-flame ionization detector (GC-FID). The results revealed that the hazelnuts in all regions comprised various types of unsaturated FA, such as oleic acid (C18:1), linoleic acid (C18:2), palmitic acid (C16:0), stearic acid (C18:0), eicosenic acid (C20:1), and linolenic acid (C18:3). Among these, the content of oleic acid, linoleic acid, and remaining FA was 76.8%–80.8%, 8.6%–11.5%, and 16%–18%, respectively. Thus, no differences were observed in the compositions of hazelnuts obtained from various regions. In conclusion, the unsaturated FA are an active ingredient in hazelnut that act as the major index component for developing functional healthy food.

養護敎師 業務分析

송화영 韓國學校保健學會 1989 韓國學校保健學會誌 Vol.2 No.2

본 연구는 1987년 3월 1일부터 1988년 2월 28일까지 서울시 1개 국민학교의 양호교사 업무활동을 대상으로 업무영역별 시간량을 비교분석하여 양호교사 직무개발에 도움을 주고자 시도되었다. 본 연구에서 분석한 양호교사의 업무량을 기준으로 본다면 1인의 양호교사 업무는 재적학생수 1,500명이 바람직하다고 본다. 양호교사 업무가 5, 6, 9월에 편중되어있는 것을 분산시킬 수 있는 행정지원이 있어야 한다. 원활한 학교보건교육이 이루어지기 위해서 양호교사에 의한 보건교육의 제도화와 교육자료개발에 국가적 지원이 있어야 하고 학교보건활성화를 위하여 1인의 양호교사활동에 전 교직원의 적극적인 협조가 이루어질 수 있도록 학교보건에 관심이 조장되어야 한다.

지속가능발전을 위한 도심지하공간개발: 정책방향 제시와 적용지표 탐색

송화영 한국정책학회 2012 한국정책학회 학술대회 Vol.2012 No.4

지속가능한 발전 이라는 개념은 환경문제를 넘어서 모든 분야에 걸쳐 추구해야 할 목표로 자리 잡았으나, 지구환경상태는 여전히 악화되고 있다. 인구의 도시집중화로 지구 전체 에너지의 대부분이 도시에서 소모되고 있으며, 계속된 산업화로 인해 각종 문제가 발생하고 있다. 이에 도시의 지속가능발전을 위한 연구와 정책이 보다 시급하다. 최근 미국과 유럽을 중심으로 도시문제의 해결을 위해 지하공간개발이 논의되고 있으며, 본 연구에서는 지속가능발전을 위한 도심지하공간의 역할을 정립하고 분석틀을 제공하고자 한다. 문헌 연구와 전문가 자문 및 AHP를 통해 지하공간의 역할이 환경, 경제, 사회분야에 걸쳐 분석되었으며, 22개의 지하공간 관련 지속가능발전 지표선정 후 항목 간의 가중치가 계산되었다. 도심 지하공간은 태생적인 높은 에너지 효율성과 재난에 강한 내구성 및 개발로 인한 지상 공간 창출 등의 이점이 있으며, 관련 지표의 가중치 역시 높게 분석되었다. 도출된 지표 중 일부를 이용하여 해외우수사례와 한국의 비교연구가 수행되었으며 재난관련 항목의 편차가 가장 큰 것으로 해석되었다. 다음단계 분석으로 도시사례 적용 및 지표의 세분화 등이 제시되었으며 본 연구의 결과는 도시의 지속가능한 발전을 위해 지하공간개발을 고려하는 대안 정책 마련의 가능성을 제고하고, 사업을 선정 및 분석하거나 개발단계 모니터링 수행 시 적용될 수 있다.

바닥충격 완충재의 소음저감 성능에 관한 실험적 연구

송화영,이동훈 서울産業大學校 2005 논문집 Vol.54 No.1

In this study, the dynamic properties of a floor impact sound isolation pad expressed in terms of the natural frequency, the dynamic stiffness per unit area and the loss factor are measured by the resonant method. By using the measured dynamic properties, the vibration transmissibility diagram is obtained for each isolation pad, which is compared with the values tested by the impact sound sources at the room in an apartment. From the comparative results, it is found that the noise reduction performances of isolation pads are closely connected with the natural frequency and the dynamic stiffness per unit area.