제장간막관 및 혈관 잔류이상에 대한 임상적 고찰

최재영,정풍만,Choi, Jae-Young,Jung, Poong-Man 대한소아외과학회 1998 소아외과 Vol.4 No.1

Of 72 patients with vitelline duct and vessel remnants, 45 (62.5 %) had symptomatic lesions. The mean age of the patients was 27.9 months. Males predominated (4.6 : 1). There were 22 cases of Meckel's diverticulum, 6 of Meckel's diverticulum attatched to the umbilicus with a fibrous band, 6 cases of patent vitelline duct, 5 cases of vitelline artery remnants as a fibrous band and 2 cases each of umbilical sinus and polyp, and vitelline cyst. Twenty-three patients (51 %) presented with intestinal obstruction, 6(13 %) with rectal bleeding, 4(9 %) with perforated Meckel's diverticulum, 5 with intestinal juice drainage through umbilicus, 5 with umbilical lesions, 1 with abdominal mass, and 1 with sepsis. Intestinal obstruction due to fibrous band developed during infancy(average age; 4.6 months). Seventeen asymptomatic Meckel's diverticulum, 8 obliterated vitelline artery remnants and 1 vitelline vein remnant as fibrous band, and 1 vitelline cyst were found incidentally at laparotomy. About 82 % of the complicated Meckel's diverticulum presented in infants and children less than 4 years of age.

RFID 사용요인이 신뢰, 지각된 위험, 모바일RFID환경 하에서 사용의도에 미치는 영향 -약국RFID 시스템을 중심으로-

최재영 ( Jae Young Choi1 ),차재빈 ( Jae Bin Cha1 ),김상만 ( Sang Man Kim ) 경희대학교 경영연구원 2013 의료경영학연구 Vol.7 No.1

This study examined the influence of various factors of RFID use in mobile RFID environment, focusing on pharmacies` RFID systems. The purpose of the study was to verify the possibility of a more widespread use of RFID and mobile RFID in medical industry by exploring what impact RIFD use factors have on the intention to use in RFID environment. The subjects were pharmacists who have their own pharmacies in Seoul and Gyeonggi Province. Of 400 questionnaires distributed to the respondents, 392 were used in the final analysis except 8 with insufficient answers. The empirical analysis results showed that perceived security, perceived cost, and social influence had significant impacts on trust, while social influence and perceived cost had significant impacts on perceived risk. Among RFID use factors, social influence, perceived security, and perceived risk had significant impacts on intention to use in mobile RFID environment. Trust and perceived cost did not have a significant impact. The summary of analysis results, implications, and limitations are presented in the conclusion.

IT 투자 정당화 요인에 관한 연구

최재영,Choi, Jaeyoung 디지털산업정보학회 2015 디지털산업정보학회논문지 Vol.11 No.4

Although actual business environment is getting difficult and hard, IT companies tend to shy away from of annual investment. Many firms have already reached the 25 percent level. However, the profit and the result of their annual investment needs to be evaluated objectively. IT investment analysis usually proceeds by comparing benefits and costs of an IT investment. Much of the problem derives from the historical treatment of IT as an overhead expense rather than a capital asset. What is most worrying about the current situation is the pressure to take a very short-term view of IT. Therefore, this research aims to analyses and justify the necessity of Visionary IT Investment. For this, it is crucial to identify the factors, which affect positively Visionary IT Investment and understand the role of CIO and explain the result of Visionary IT Investment, which is differed to related business and by different business environment. As a result of this study, the legitimacy of IT Investment is proved through analyzing the business value of not investing and cost-avoidance strategies.

팔로 4징의 완전 교정술 후 장기 추적 관찰상 나타나는 문제 - 만기 관리의 새로운 패러다임 -

최재영,Choi, Jae Young 대한소아청소년과학회 2003 Clinical and Experimental Pediatrics (CEP) Vol.46 No.7

원격코드검증을 통한 웹컨텐츠의 악성스크립트 탐지

최재영,김성기,이혁준,민병준,Choi, Jae-Yeong,Kim, Sung-Ki,Lee, Hyuk-Jun,Min, Byoung-Joon 한국정보처리학회 2012 정보처리학회논문지 C : 정보통신,정보보안 Vol.19 No.1

Sharing cross-site resources has been adopted by many recent websites in the forms of service-mashup and social network services. In this change, exploitation of the new vulnerabilities increases, which includes inserting malicious codes into the interaction points between clients and services instead of attacking the websites directly. In this paper, we present a system model to identify malicious script codes in the web contents by means of a remote verification while the web contents downloaded from multiple trusted origins are executed in a client's browser space. Our system classifies verification items according to the origin of request based on the information on the service code implementation and stores the verification results into three databases composed of white, gray, and black lists. Through the experimental evaluations, we have confirmed that our system provides clients with increased security by effectively detecting malicious scripts in the mashup web environment. 최근 웹사이트는 매쉬업, 소셜 서비스 등으로 다양한 출처의 리소스를 상호 참조하는 형태로 변화하면서 해킹 시도도 사이트를 직접 공격하기보다 서비스 주체와 연계 서비스, 클라이언트가 상호 작용하는 접점에 악성스크립트를 삽입하는 공격이 증가하고 있다. 본 논문에서는 웹사이트 이용 시 신뢰관계에 있는 여러 출처로부터 다운받은 웹컨텐츠의 HTML 코드와 자바스크립트 코드가 클라이언트 브라우저에서 구동 시 삽입된 악성스크립트를 원격의 검증시스템으로부터 탐지하는 모델을 제안한다. 서비스 주체의 구현코드 정보를 활용하여 요청 출처에 따라 검증 항목을 분류하고 웹컨텐츠의 검증 요소를 추출하여 검증 평가결과를 화이트, 그레이, 블랙 리스트로 데이터베이스에 저장하였다. 실험평가를 통해 제안한 시스템이 악성스크립트를 효율적으로 탐지하여 클라이언트의 보안이 향상됨을 확인하였다.

질산산화법을 이용한 SiO₂/Si 구조의 계면결함 제거

최재영,김도연,김우병,Choi, Jaeyoung,Kim, Doyeon,Kim, Woo-Byoung 한국재료학회 2018 한국재료학회지 Vol.28 No.2

5 nm-thick $SiO_2$ layers formed by plasma-enhanced chemical vapor deposition (PECVD) are densified to improve the electrical and interface properties by using nitric acid oxidation of Si (NAOS) method at a low temperature of $121^{\circ}C$. The physical and electrical properties are clearly investigated according to NAOS times and post-metallization annealing (PMA) at $250^{\circ}C$ for 10 min in 5 vol% hydrogen atmosphere. The leakage current density is significantly decreased about three orders of magnitude from $3.110{\times}10^{-5}A/cm^2$ after NAOS 5 hours with PMA treatment, although the $SiO_2$ layers are not changed. These dramatically decreases of leakage current density are resulted from improvement of the interface properties. Concentration of suboxide species ($Si^{1+}$, $Si^{2+}$ and $Si^{3+}$) in $SiO_x$ transition layers as well as the interface state density ($D_{it}$) in $SiO_2/Si$ interface region are critically decreased about 1/3 and one order of magnitude, respectively. The decrease in leakage current density is attributed to improvement of interface properties though chemical method of NAOS with PMA treatment which can perform the oxidation and remove the OH species and dangling bond.

고지방식이로 유도된 C57BL/6 mice에서 감국이 미치는 비만억제 효과

최재영,이자복,김명옥,Choi, Jae Young,Lee, Ja-bok,Kim, Myeong-ok 중소기업융합학회 2021 융합정보논문지 Vol.11 No.4

감국의 유산균 발효를 통한 감국 배양물(CILL)의 비만억제 식품의 소재로서 가능성을 알아보기 위해 고지방식이로 유도된 C57BL/6 mice에서의 체중, body fat mass, T cell 등을 측정하였다. 체중 변화에서 CILL 군 (25.15±2.44 g)은 4주부터 체중 감소를 보였으며, 1주차부터 8주차까지 낮은 증체량을 유지했다(1.00±0.53 g). 8주 체중(30.38±4.17 g)은 HFD 군(60% high fat diet, 34.99±2.09 g) 대비 13.15%의 체중 감소를 보였다. Fat mass는 10.3022±2.8813 g로 감소했으며, 간 절대 중량에서 HFD 군에 비해 감소하였다. CD4+ T cell 4.84±1.33%, CD8+ T cell 7.02±2.26%, CD4+CD8+ T cell 1.46±0.81%로 HFD 군에 비해 높게 측정되었다. 결과적으로 CILL은 비만억제 효과가 있으며, CILL내의 비만억제 물질을 선별한다면 효과적인 비만억제 식품 소재로서의 가능성이 있을 것으로 사료된다. In order to determine the possibility that Chrysanthemum indicum L. cultured with Lactococcus lactis (CILL) is a material for obesity suppression food, the body weight, body fat mass, and T cells were determined in C57BL/6 mice induced by a high fat diet. The CILL (25.15±2.44 g) demonstrated weight loss from week 4 onward and maintained a low weight gain from week 1 to week 8 (1.00±0.53 g). The 8-week body weight (30.38±4.17 g) indicated loss of 13.15% when compared to the HFD (60% high fat diet, 34.99±2.09 g). Fat mass decreased to 10.3022±2.8813 g, and the absolute liver weight decreased relative to that in the HFD. CD4+ T cells were 4.84±1.33%, CD8+ T cells 7.02±2.26%, and CD4+CD8+ T cells 1.46±0.81%, which were all higher than those in the HFD. As a result, CILL can be used as a material for preventing obesity as an effective measure toward reducing weight when consumed orally.

사상의학적(四象醫學的) 중풍치험(中風治驗) 157례(例)에 대(對)한 임상적(臨床的) 연구(硏究)

최재영,박성식,Choi, Jae-young,Park, Seong-sik 사상체질의학회 1998 사상체질의학회지 Vol.10 No.2

1. 연구배경 및 목적 중풍환자(中風患者)에 대한 임상적 연구를 통하여 중풍치료(中風治療)에 사상의학적(四象醫學的) 관리지침을 설정하고 체질병증(體質病證)의 이해에 도움을 주고자 한다. 2. 방 법 1997년 3월부터 1998년 2월까지 1년간 동국대학교 분당한방병원 체질의학클리닉에 입원치료 받았던 뇌졸중 환자 157명(남자 79명, 여자 78명)을 대상으로 환자의 특성(特性), 병력(病歷), 증상(症狀), 치료경과(治療經過) 등에 관하여 조사하고 분석하였다. 3. 결 과 환자의 체질분포는 태음인(太陰人)이 88명(56.1%), 소양인(少陽人)이 48명(30.6%), 소음인(少陰人)이 21명(13.4%)이었다. 연령의 50세 이상에서 70세 미만이 과반수를 차지하였고 평균은 65세로 나타났다. 뇌졸중의 발병 양태로 뇌경색이 119명(75.8%)으로 대부분을 차지했으며, 뇌출혈이 11명(7.0%), 지주막하출혈이 1명(0.6%), 일과성뇌허혈발작(TIA)이 26명(16.6%)으로 나타났다. 입원시 병증관리지침(病證管理指針)의 상황으로 설태이상(舌苔異常)이 가장 많았고, 수면장애(睡眠障碍), 대사장애(大使障碍), 소변장애(小便障碍) 등의 순서로 나타났으며, 중풍관리지침(中風管理指針)의 호전도(好轉度)를 살펴보면 대사장애(大使障碍)가 87.1%의 호전율(好轉率)로서 가장 높았고, 다음으로 정서장애(情緖障碍), 연하장애(嚥下障碍) 등의 순서였다. 1. Background and Purpose: We intended to make the standards of CVA management of Sasang Constitutional Medicine and be helpful to understand the constitutional symptoms through a clinical study of CVA. 2. Methods: We studied 157 CVA inpatients(79 men and 78 women) who were in constitutional clinic of Dongguk Pundang Oriental Hospital during 1 year from March 1997 to February 1998. We investigated and analysed the characteristics, past histories, symptoms and progresses of patients. 3. Results: The results of constitutional analysis showed 88 Taeumin(56.1%), 48 Soyangin(30.6%) and 21 Soeumin(13.4%). The frequency of strokes was much the same between male and female and the greater part of cases were 50-70 of age. The CVA cases were classified into 119 cerebral infarction(75.8%), 11 cerebral hemorrhage(7.0%), 1 subarachnoid hemorrhage(0.6%) and 26 trasient ischemic attack. From the standards of symptom management, there were abnormality of a coated tongue(63.1%) in most cases, sleeping disorders(48.4%), excremental disorders(44.7%) and urinary disorders(36.9%) on admission. With regard to the rate of improvement in the standards of CVA management, excremental disorders improved 87.1% and emotional disorder 81.0%, swallowing disorder 78.7% and so on.

복강경 부신절제술을 시행한 11예에 관한 임상적 고찰 ⁣고식적 수술법과의 비교⁣

최재영,고석환,이길연,이석환,이상목,박호철,홍성화,오수명,윤충,Jae Young Choi,Suck Hwan Koh,Kil Yeon Lee,Suk Hwan Lee,Sang Mok Lee,Ho Chul Park,Sung Wha Hong,Soo Myung Oh,and Choong Yoon 대한갑상선-내분비외과학회 2003 The Koreran journal of Endocrine Surgery Vol.3 No.2

IEC 60079-10-1 edition 2.0에 의한 방폭 설계 한계점 보완 방법에 관한 연구

최재영,변상훈,Choi, Jae-Young,Byeon, Sang-Hoon Korea Safety ManagementScience 2020 대한안전경영과학회지 Vol.22 No.2

IEC 60079-10-1 edition 2.0, the global standard for hazardous area classification, was newly revised in 2015. There are many differences compared to the previous edition 1.0 version, first released in 2008, so it has caused confusion in the industry. In case of edition 1.0, the hazardous area extent can be derived through the mathematical formula, but in case of edition 2.0, there was the problem that the exact hazardous area extent was not known because of the mathematical formula of the plot for applying the hazardous area extent was not presented. In this study, we converted the plot introduced in edition 2.0 to CAD format and derived the plot as the mathematical equations. Through this, we suggest the hazardous area extent formula of three states (heavy gas, diffusive, jet). As the IEC committee did not provide the mathematical formula of the hazardous area extent according to the release characteristic, it is impossible to apply the exact hazardous area extent. In this study, a mathematical approach was derived for the plot introduced in edition 2.0, which can reduce the confusion of the applying hazardous area extent.