진단 전에 자반이 동반되지 않았던 Henoch-Schönlein 자반 위장병증의 임상적 고찰

오재민,박재홍,Oh, Jae Min,Park, Jae Hong 대한소아소화기영양학회 2004 Pediatric gastroenterology, hepatology & nutrition Vol.7 No.1

Purpose: Henoch-$Sch{\ddot{o}}nlein$ purpura (HSP) is a small-vessel vasculitic disease that most often affects the skin. Abdominal symptoms precede the typical purpuric rash of HSP in 14~36%. It is a challenge to diagnose HSP in the absence of a rash, because there are no biologic tests that can identify HSP with certainty, so we tried to find out the characteristic features of HSP gastroenteropathy without purpura before diagnosis. Methods: This study included 82 children with HSP who had been admitted or visited outward of the Department of Pediatrics, Pusan National University Hospital from 1995 to 2000. The cases that the onset of purpura preceded or coincided that of abdominal pain were defined as purpura-positive group. The cases that the onset of abdominal pain preceded purpura more than 1 week and purpura was not presented till diagnosed as HSP gastroenteropathy were defined as purpura-negative group. We compared and analyzed the clinical features of the two groups by reviewing the medical records retrospectively. To ensure the diagnosis of HSP gastroenteropathy, we conducted upper GI series, abdominal ultrasonogram, abdominal CT, endoscopy and/or skin biopsy. Results: The number of cases of purpura-positive group and purpura-negative group were 72 and 10, respectively. There is no difference between two groups in the incidence of clinical symptoms and laboratory findings. Children with HSP gastroenteropathy had characteristic erosive or ulcerative lesions in the stomach or duodenum on esophagogastroduodenoscopy, or mural thickening of the small bowel on abdominal ultrasonogram, CT or upper GI series. Skin biopsy revealed leukocytoclastic vasculitis in 3 of them, although biopsy specimen was taken from any areas of normal- appearing skin. In purpura-negative group, 9 patients improved by steroid therapy. Conclusion: In purpura-negative group, there is no diagnostic feature on the laboratory findings and clinical features. Therefore, to diagnose HSP gastroenteropathy in patients with abdominal pain in the absence of the characteristic rash, careful observation of clinical features and laboratory data, and prompt application of available diagnostic tools such as gastrointestinal endoscopy, radiologic study and skin biopsy are recommended. Early use of corticosteroid may reduce the suffering in these patients.

부산 지역 초등학교 1학년 학생들의 심장질환의 집단검진에 관한 연구

오재민,박희주,Oh, Jae Min,Park, Hee Ju 대한소아청소년과학회 2003 Clinical and Experimental Pediatrics (CEP) Vol.46 No.5

Purpose : We'd like to determine the incidence of congenital heart disease and arrhythmia in elementary school children in Busan, and to provide adequate prevention and treatment. Methods : A total of 23,802(male 12,909, female 10,893) 1st grade elementary school children living in Busan were studied. All children were 7-8 years old. We obtained their medical history by questionnaire and checked elecrocardiography(ECG). Subsequent screening tests including a 2nd ECG, chest X-ray, phonocardiogram and CBC for the students who had abnormal findings at the first screening test. The third screening test was done for students who had cardiac murmurs or abnormal ECG findings in the second screening test by echocardiogram, treadmill test and 24-hour Holter monitoring. Results : Among 23,802 children participants, 605(2.54%) had abnormal ECG findings at the first screening test. Q wave abnormality(0.58%) was observed most frequently, and complete right bundle branch block(RBBB)(0.26%), sinus tachycardia(0.24%), right axis deviation(0.22%) and ventricular premature contraction(VPC)(0.21%) followed in order. Four hundred and twenty four children participated in the second ECG screening test. Two hundred and two children(47.6%) had an abnormality such as sinus tachycardia(18.8%), VPC(17.8%), or complete RBBB(17.3%). After completing the third examination including echocardiogram, we couldn't find the students with ventricular tachycardia (VT) or SVT at the third arrhythmia screening test. Conclusion : A high incidence of arrhythmia was found in the 1st grade elementary school children in Busan despite their healthy appearances, although fatal heart diseases were not noted. Early diagnosis, adequate preventative measures and treatment will prevent and decrease the frequency of emergent situations like syncope and sudden death.

Rebamipide Protects TNBS Induced Colonic Damage Through Down-regulation of NF-κB Activation and Induction of Heme Oxygenase-1 Expression

오재민(Jae Min Oh),이정래(Jeong Re Lee),권영미(Young-Mi Kwon),김유림(Yu Rim Kim),김경숙(Kyoung Suk Kim),최민규( Min Kyu Choi),정연태(Yeun Tai Chung) 대한해부학회 2005 Anatomy & Cell Biology Vol.38 No.1

크론병은 proinflammatory cytokine들이 중요한 역할을 하는 만성 염증성 대장 질환이다. Rebamipide는 위궤양 치료제로 개발된 약제로 항염증 작용이 있다고 알려져 있으나 크론병 환자에서 그 작용기전은 정확하게 알려져 있지 않다. 따라서 우리는 크론병 동물모델인 TNBS에 의해 유도된 만성 대장염 모델에서 rebamipide의 항 염증 기전을 조사하였다. TNBS에 의해 유도된 만성 대장염에서 rebamipide는 MPO 활성 및 병리조직학적 증상들을 현저히 개선하였다. Rebamipide는 대장상피세포주인 HT-29세포에서 TNF-α에 의한 Il-8 분비, ICAM-1 발현, NF-κB 활성 등을 억제하였다. 또한 rebamipide는 HT-29세포에서 항염증작용이 있다고 알려진 heme oxygenase-1 (HO-1)의 발현을 증가시켰다. HO-1의 유도제인 copper protoporphyrin IX (CoPPIX)는 HT-29세포에서 NF-κB 활성 등을 억제하였고 TNBS에 의해 유도된 만성 대장염에서의 rebamipide의 효과를 재현하였다. 이상의 결과로 Rebamipide는 HO-1의 유도를 통해서 크론병의 치료에 있어 중요한 치료제가 될 수 있다고 생각하였고 HO-1은 크론병의 치료에 중요한 표적물질이 될 수 있다고 생각하였다. Crohn’s disease is characterized by a chronic relapsing inflammation of the bowel in which proinflammatory cytokines play an important role. Rebamipide is an anti-gastric ulcer drug with anti-inflammatory properties in vivo and in vitro. The effects of rebamipide on Crohn’s disease have not been carefully evaluated. This study investigated the potential of rebamipide to protect Crohn’s disease using a murine model of colitis induced by trinitrobenzene sulfonic acid (TNBS). Rebamipide dramatically improved histopathological symptom involving myeloperoxidase (MPO) activation and increase of microscopic damage score in TNBS induced colitis. Rebamipide suppressed IL-8 secretion, ICAM-1 induction and nuclear factor-κB (NF-κB) activation by TNF-α and induced heme oxygenase-1 (HO-1) in HT-29 cells. HO-1 inducer cobalt protoporphyrin IX (CoPPIX) suppressed NF-κB activation by TNF-α in HT-29 cells like rebamipide, and mimicked the protective effects of rebamipide on TNBS induced colitis. This suggests that rebamipide exerts anti-inflammatory effects by down-regulating NF-κB activity via inducting HO-1 expression. In conclusion, this study suggests that rebamipide represents a potential therapeutic agent and HO-1 is an important therapeutic target for the treatment of Crohn’s disease.

등록 이미지를 활용한 Face Anti-Spoofing개선

오재민(Jae Min Oh),정호기(Ho Gi Jung) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6

This paper focused on the fact that common face recognition technologies, such as door control or mobile phone unlocking, can know the users identity in advance. This paper proposes that when the users identity is provided, the performance of face antispoofing can be improved by using the already registered users image. To implement this, the same feature extractor is applied to the registered image and the current image, and then the concatenated result is applied to a binary classifier that classifies it into live or spoofing. It was confirmed that the accuracy was improved by 3%p compared to the existing method that uses only the current image.

학생운동선수의 생활환경 실태조사: 테니스선수를 중심으로

오재민(Jae-Min OH),박재현(Jae-Hyeon PARK),김혜진(Hyeoi Jin KIM) 한국체육측정평가학회 2022 한국체육측정평가학회지 Vol.24 No.1

이 연구는 학생테니스선수가 학교생활 및 운동생활을 하며 보편적으로 관계를 맺고 있는 전반적인 생활환경에 대해 어떻게 인식하고 있는지 실태를 확인하고 개인의 특성에 따른 인식의 차이를 확인하는 것이 목적이다. 국내 중•고등학교에 재학 중인 학생테니스선수를 연구대상으로 선정하였으며, 편의표집추출방법을 사용하여 160명의 자료 중 응답거절 및 무응답, 불성실 자료를 제외한 155명을 최종연구대상자로 선정하였다. 학생테니스선수들의 운동 환경인식에 대한 실태를 조사하기 위하여 설문지는 학습, 지도자와의 관계, 교우 및 팀원과의 관계, 훈련 및 대회관련 환경을 측정하는 4개요인 37문항, 5점 척도로(매우 그렇다, 그렇다, 보통이다, 아니다, 전혀 아니다) 구성하였다. 설문은 구글 설문지를 이용하여 조사를 실시하였으며, 수집된 자료는 MS-Excel을 이용하여 정리하였다. 자료처리를 위해 IBM SPSS 25.0을 이용하여 기술통계분석과 Chi-squared test (x²)를 실시하였으며, 모든 통계적 유의수준은 a=.05로 설정하였다. 이 연구의 결과는 다음과 같다. 학생테니스선수의 ‘학습관련 인식’에서는 3번문항(χ²=22.72, p=.000), 9번문항(χ²=18.593, p=.001), 10번 문항(χ²=11.193, p=.024) 등에서 중학생이 고등학생에 비해 긍정적으로 인식하고 있는 것으로 나타났으며, ‘지도자와의 관계 관련 인식’에서는 전반적으로 남학생이 여학생에 비해 지도자에 관해 긍정적으로 인식하고 있는 것으로 나타났다. ‘교우 및 팀원과의 관계 관련 인식’에서는 2번문항(χ²=16.18, p=.001)에서만 중학생이 긍정적으로 인식하고 있으며, ‘훈련 및 대회관련 인식’에서는 2번문항(χ²=8.457, p=.037)과 4번문항(χ²=12.216, p=.016)에서 남학생이 여학생에 비해 긍정적으로 인식하고 있는 것으로 나타났다. 전반적으로 상급학교 진학 등에 부담감이 적은 중학생이 고등학생에 비해 학습이나 교우 관계에서 긍정적인 인식을 하고 있는 것을 알 수 있는 있으며, 여학생들이 지도자와 훈련 등에서 어려움을 느끼는 것을 알 수 있다. 또한 학생운동선수들은 공부에 대한 필요성은 느끼지만 운동과 병행하는 것에 대한 어려움을 겪고 있는 것을 알 수 있다. 이러한 결과는 추후 학생운동선수들을 이해하고 지도하는데 있어 도움이 될 것으로 판단된다. The purpose of this study is to investigate the actual conditions of learning, relationships with leaders, relationships with companions and team members, training, and competition-related environments in which student tennis athletes have relationships in school and exercise. Specifically, it was intended to check how student tennis players perceived learning, relationships with leaders, relationships with companions and team members, training, and competition-related environments, and to see if there were differences in perceptions according to individual characteristics. Student tennis players enrolled in middle and high schools in Korea were selected as the subjects of the study. Data of 160 people were collected using the convenience sampling extraction method, and 5 people submitted response rejection, non-response, and unfaithful data, and 155 people were selected as the final study subjects. In order to investigate the reality of student tennis athletes" perception of the sports environment, the questionnaire consisted of 37 questions and 5 points (defiantly, yes, normal, no, never) measuring the environment related to learning, leaders, companions and team members. The survey was conducted using the Google questionnaire, and the collected data were organized using MS-Excel. Descriptive statistical analysis and Chi-square test (χ²) were conducted using IBM SPSS 25.0 for data processing. At this time, all statistical significance levels are a=.It was set to 05. The conclusions obtaind from the results of this study are as follows. It was found that there were differences in learning-related perceptions according to the personal characteristics of student tennis players, and there were no significant differences in perceptions related to leaders, companions and team members, training, and competitions. This shows that there are differences in what student athletes perceive according to their personal characteristics in questions related to learning. Specifically, it was found that student athletes felt the need to study, but had difficulty in parallel with exercise.

팀스포츠학습 모형 적용 체육수업이 집단응집력과 학교적응력에 미치는 영향

오재민 ( Oh Jae-min ),천종문 ( Cheon Jong-mun ),이병준 ( Lee Byung-jun ) 충남대학교 교육연구소 2017 교육연구논총 Vol.38 No.1

The purpose of this study was to investigate the effect of physical education class applied by team-sport learning on the group cohesiveness and the school adaptability. For this purpose, the group of team-sport learning model was applied to 124 students (male: 103, female: 21) from K middle school in Gimhae, Gyeonsangnam-do province, while the traditional function-oriented model was applied to the other 155 students (male: 86, female: 69) as control group. Futsal was applied to each group in their regular Physical Education classes. School adaptability and group cohesiveness were measured before and after 15 weeks of Futsal classes. Data were analyzed by using covariance analysis and repeated variance analysis. P<.05 was considered statistically significant for all analyses. As results, first, team-sport learning enhanced group cohesiveness. including the individual society, individual task, group society, and group task. Secondly, team-sport learning improved school adaptability including the environmental adaptation, teacher adaptation, class adaptation, and life adaptation. Based on these results, the direct impact of the team-sport learning model on the improvement of social skills was discussed.

CNN 기반 수박 암수구별

오재민(Jae Min Oh),정호기(Ho Gi Jung) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.11

Watermelon, a fruit we eat a lot in summer, has male and female. Female watermelons have higher sugar content than male watermelons. They have fewer seeds and have thinner shells. The male and female watermelon can be distinguished by the shape of the navel. In order to help general consumers to choose female watermelons having these advantages, this paper proposes a method recognizing the gender of watermelon from an image taken with a mobile phone using ResNet50 V2. In order to implement the proposed system, a total of 7,483 images were obtained by directly photographing the navel of watermelons at various hypermarkets and supermarkets. As a result of implementation and verification using Pytorch, an accuracy of 99.90% was measured.

국가연구개발사업 성과물의 지식재산권 측면에서의 보호관리 개선 방안 연구

오재민(Oh Jae Min),김상태(Kim Sang Tae) 한국통신학회 2013 한국통신학회 학술대회논문집 Vol.2013 No.6

본 논문은 국가연구개발사업을 비롯한 기타 연구지원사업의 연구성과물을 중심으로 산.학.연에서 이루어지는 연구개발성과의 확산 및 보호를 통한 국가산업경쟁력 발전 및 유도를 위해 지식재산권법 측면에서의 법 제도적 관리 방안을 제시하고자 한다.<br/> 현재 국가연구개발사업의 성과물에 관헌 법 제도는 행정적 관리 법제에 가까운데, 이와 같은 문제점을 해결하기 위해 지식재산권법 측면에서의 효과적인 관리를 위한 개선방안을 제시하고자 한다.<br/>

굴곡 형상 복합재 구조물의 스프링-인 예측

오재민(Jae-Min Oh),김위대(Wie-Dae Kim) 한국항공우주학회 2015 한국항공우주학회지 Vol.43 No.1

본 연구에서는 탄소섬유강화 복합재를 적층각과 적층순서에 따라 C-channel 형상에서 발생하는 스프링-인을 유한요소해석(ABAQUS)을 통해 예측하였다. 복합재 제작공정에서 냉각시의 큰 온도차 및 적층각에 따른 열팽창계수 및 화학적 수축계수의 차이로 인해 변형(스프링-인)이 발생한다. 이러한 변형은 제품의 품질과 직결되는 문제이며, 반드시 고려되어야 할 사항이다. 유한요소해석 시 CHILE모델과 화학적 수축을 고려한 서브루틴을 제작하여 적용하였으며, [0/X/Y/90]s case에 대해 X,Y를 0~90°까지 변화시키며 각 case에 대한 스프링-인 발생량을 예측, 분석하였다. This paper predicts the spring-in effect of curved laminated composite structure for various stacking sequence using finite element analysis(ABAQUS). In composite manufacturing process, large temperature difference, different coefficient of thermal expansion and chemical shrinkage effect cause distortion of composite parts such as spring-in and warpage. Distortion of composite structure is important issue on quality of product, and it should be considered in manufacturing process. In finite element analysis , a CHILE(Cure Hardening Instantaneously Linear Elastic) model and chemical shrinkage effects are considered developing user subroutine in ABAQUS and some cases are simulated.

횡단보도 신호등에 설치된 카메라를 이용한 불법 우회전 검출

오재민(Jae Min Oh),정호기(Ho Gi Jung) 대한전자공학회 2024 대한전자공학회 학술대회 Vol.2024 No.6

This paper proposes a system to detect illegal right-turning vehicles by installing cameras at crosswalk traffic lights. Using YOLOv3, if a pedestrian, a green traffic light, and a vehicle are detected at the same time, it can be detected that the vehicle has made an illegal right turn. And then, the proposed system detects the vehicle license plate and applies OCR to it to recognize the vehicle number. The proposed system is trained based on a self-constructed dataset consisting of total of 2655 images and achieved 88.8% recall and 100.0% precision.