다기통 엔진 흡기시스템의 유동해석 모델개발

송재원,성낙원,Song, Jae-Won,Seong, Nak-Won 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.6

To design an optimum engine intake system, a flow model for the intake manifold was developed by the finite difference method. The flow in the intake manifold was one-dimensional, and the finite difference equations were derived from governing equations of flow, continuity, momentum and energy. The thermodynamic properties of the cylinder were found by the first law of thermodynamics, and the boundary conditions were formulated using steady flow model. By comparing the calculated results with experimental data, the appropriate boundary conditions and convergence limits for the flow model were established. From this model, the optimum manifold lengths at different engine operating conditions were investigated. The optimum manifold length became shorter when the engine speeds were increased. The effect of intake valve timings on inlet air mass was also studied by this model. Advancing intake valve opening decreased inlet air mass slightly, and the optimum intake valve closing was found. The difference in inlet air mass between cylinders was very small in this engine.

자폐 스펙트럼 장애 청소년에서 주의력결핍 과잉행동장애 유무에 따른 임상적 특성

송재원(Jae-Won Song),반건호(Geon-Ho Bahn),조인희(In-Hee Cho),조수철(Soo-Churl Cho),김붕년(Bung-Nyun Kim),신민섭(Min-Sup Shin),김재원(Jae-Won Kim),박수빈(Subin Park),홍순범(Soon-Beom Hong),유희정(Hee-Jeong Yoo) 대한소아청소년정신의학회 2013 소아청소년정신의학 Vol.24 No.4

Objectives:It is known that adolescents with autism spectrum disorder (ASD) often concurrently exhibit attention-deficit hyperactivity disorder (ADHD). The objective of this study is to investigate how ADHD symptoms modify clinical characteristics in adolescents with ASD. Methods:Subjects were recruited from the Program for the Education Enrichment of Relational Skills program, which is a program for adolescents with ASD to promote and train social skills. The study participants and their parents completed the study questionnaires, such as the ADHD rating scale, Autism Diagnostic Observation Schedule, and Korean version of Child Behavior Checklist. Results:Adolescents with ASD and ADHD (N=19) were found to have more impaired sociality, less open communication with their parents, and more behavioral and emotional problems compared with adolescents with ASD, and without ADHD (N=28). Conclusion:Although further research is needed, the results of our study suggest that adolescents with ASD present different clinical characteristics when comorbid with ADHD.

능동 베어링 개념을 사용한 풍력 터빈 구동계의 진동 저감

송재원(Jae Won Song),권준희(Jun Hee Kwon),김병일(Byeongil Kim) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.6-1

대역 내 기준 파장을 갖는 근적외선 그리즘 실리콘 광 면 센서 분광기 설계 및 제작

송재원 ( Jae-won Song ) 한국센서학회 2017 센서학회지 Vol.26 No.1

An NIR grism Si optical area sensor spectrometer with in-band reference wavelength is designed and fabricated. It is composed of a transmission type diffraction grating (spatial density 300 line/mm), a rectangular N-BK7 prism (apex angle 30 degree), NIR filter( cutoff wavelength 720 nm), an imaging convex lens(focal length 50mm F1.8) and an IR modified DSLR camera (Canon EOS40D) of Si optical area sensor (3,888 × 2,592 pixels, pixel size 5.710 μm). “In-band reference wavelength function” is implemented using non-dispersive 0th diffraction order optical beam. The NIR grism spectrometer is tested in a laboratory using a halogen lamp and a Neon lamp. And the spectrometer is used in an astronomy field for obtaining the planet Jupiter NIR spectrum. In-band reference wavelength i.e. un-deviation wavelength is 846 nm, an wavelength resolution is 0.3027 nm/pixel, an wavelength resolving power is 2,794 and an wavelength range is 650~1,000 nm.

수하물 이중 적재 방지를 위한 수하물 자세교정 시스템의 효과적인 이중 수하물 분리방법

송재원(Jae-Won Song),김동철(Dong-Chul Kim) 한국컴퓨터정보학회 2018 韓國컴퓨터情報學會論文誌 Vol.23 No.3

In this paper, we propose a method to effectively split the adjacent baggage that is moving on high speed conveyor of airport. The proposed method calculate the Angle Histogram(AH) that inspects background pixels within radius r based on the center point of the adjacent baggage. After that, the adjacent baggage is segmented by finding split angles at the AH. We also improved the split quality of adjoining baggage by repeatedly correcting the center point to correctly split adjacent baggage of asymmetric size. And the calculation time of AH is reduced about 1/3 by using the symmetry property of the circle. Experiments have shown that 93% of all adjacent baggage images are correctly segmented and the proposed method is effective.

3ㆍ1운동 이후 일제의 서북지방 기독교 통제와 ‘선천사건’

송재원(Song Jae-Won) 한국기독교역사연구소 2010 한국기독교와 역사 Vol.33 No.-

이 논문은 일제 강점기 평안북도 선천에서 발생한 기독교 관계 시국사건인 선천사건에 관한 것이다. 선천사건은 1920년 9월 발생한 경찰서 폭파사건이 발단이 되어 선천 기독교계에 대한 탄압으로 이어진 사건으로, 서북지방 기독교계에 대한 일제의 대표적인 통제 사례였다. 3ㆍ1운동에 대한 무력탄압 이후 문화통치를 표방하였던 일제는 그 동안 경계 대상이었던 기독교계에 대해서도 유화책을 시도하였다. 그러나 3ㆍ1운동 이후 서북지방에서는 기독교계 조직을 중심으로 임시정부의 연통제를 통한 항일운동이 전개되었다. 또한 이 시기 서북지방에서는 무장활동도 잇따르면서, 일제의 서북지방에 대한 통제가 강화되었다. 서북지방에 대한 일제의 통제가 강화되던 1920년 9월, 선천에서 경찰서 폭파 사건이 발생한다. 이 사건은 본래 대한광복군총영이 8월에 있었던 미국 의원단의 방한을 노린 의열활동의 일환이었다. 그런데 일제는 사건의 주동자 가운데 박치의라는 선천 기독교인이 있었던 사실을 구실로 삼아, 폭파사건을 선천 기독교인들이 조직적으로 가담한 테러활동으로 확대하였다. 이 선천사건의 원인으로는 우선 선천이 지닌 기독교적 성향과 항일운동의 전력이 크게 작용하였다. 바로 기독교 교세가 강한 서북지방 가운데서도 선천은 대표적인 기독교 강세 지역이었다. 특히 선천 기독교계는 그동안 105인사건을 비롯해 3ㆍ1운동에도 연관되면서 일제의 주요 경계 대상이었다. 결국 일제는 폭파사건을 구실로 선천 기독교에 대한 탄압은 물론, 선천을 본보기로 삼아 서북지방 기독교와 항일운동을 통제하고자 했다. 이에 선천사건에 연루된 인물들은 대부분 선천 기독교계의 대표적 인물들이 었다. 이들 대부분은 3ㆍ1운동에 가담한 전력이 있었고, 기타 항일운동에도 연관되었던 것이 특징이다. 경찰은 조작수사를 통해 선천 기독교 인사들을 폭파사건에 철저히 연루시켰고, 경찰의 수사결과를 토대로 진행된 재판에서 관련자들은 중형을 선고받았다. 당시 여론의 큰 반향을 불러일으켰던 선천사건에 대한 재판결과는 평양 등 다른 지역의 사건과 비교해도 분명 과중한 처벌이었다. 선천사건 이후 선천 기독교계는 교세의 성장에도 불구하고 항일운동에서는 위축된 모습을 보였다. 이전과 같이 기독교계가 항일운동을 주도하던 양상이 1920년대 이후로는 눈에 띄지 않았던 것이다. 기독교 강세 지역으로 유명했던 특성 상, 일제의 탄압으로 인한 기독교계의 위축이 선천 사회전반에 영향을 끼쳤던 것으로 여겨진다. This thesis examines the S?n-ch'?n Incident, a Christian-related episode which happened in S?n-ch'?n, North P'y?ng-an province during the Japanese occupation. The S?n-ch'?n Incident was triggered by the bombing of a police station in September 1920 and led to the oppression of Christians in the region, especially it is a representative case of the Japanese policies of oppression against Christians in the north-west region. After the oppression of the 1919 Independence Movement by military means, the Japanese colonial government tried to advocate cultural rule and displayed also a conciliatory gesture to Christians who had been watched closely until then. But, since the 1919 Independence Movement, a system called Y?n-t'ong in the north-west region which is a secret network of communication created by the Korean provisional government centering the Christian organizations. And in the mean time, armed liberation movements followed one after another, which also intensified Japanese oppression. The bombing of a police station happened in S?n-ch'?n in september 1920 when the Japanese oppression to the north-west region was being reinforced. The incident was carried out as a part of activities of an independence movement, and it was coincided with the visit of members of American parliament to Korea in August that year, awaited by General Camp of the Korean Independence Army. Finding a Christian called Park Ch'i-?i from S?n-ch'?n among the masterminds of the incident, the Japanese rulers enlarged the bombing incident into a terrorist act, and accused the S?n-ch'?n's Christians of being systematically involved. In the reason of this S?n-ch'?n Incident, the history of S?n-ch'?n’s Christian propensity and their anti-Japanese movement played an important role. Among the relatively strong Christian communities in the north-west region, S?n-ch'?n had particularly strong Christian community. And because Christians of S?n-ch'?n had been involved in the 1919 Independence Movement as well as other incidents including the Incident of 105 people, they had become the main target of the Japanese rule. Therefore, the Japanese colonial government plotted to oppress the Christians in S?n-ch'?n to rule out the Christianity in the north-west region, setting the Incident as an example and tried to oppress the anti-Japanese movement altogether. So those who were involved with S?n-ch'?n incident were mostly representative Christians in S?n-ch'?n. Also to be noted was that most of them had a history of participating in the 1919 Independence Movement as well as being involved in other anti-Japanese movements. The police, through many false accusations, thoroughly related many of S?n-ch'?n’s Christians with the bombing incident. And in the court, based on the result of police investigation, those people were sentenced to a heavy penalty indeed. This court rule towards the people involved in S?n-ch'?n Incident caused a big sensation in the society and was definitely regarded as a cruel punishment compared to similar Incidents in other areas including P'y?ng-yang. After the S?n-ch'?n Incident, despite the continuing growth of Christianity in the region, the anti-Japanese movement did get shrunken. That is, the trend of Christians leading the anti-Japanese movements disappeared since 1920’s in the region. It is also clear that the in activeness of S?n-ch'?n’s Christians caused by the Japanese oppression influenced the general social aspects of S?n-ch'?n which had been renowned as a strong Christian community.

올바른 수하물 자세교정을 위한 효과적인 인접수하물 분리방법

송재원(Jae-Won, Song),정용하(Yong-Ha, Jung),김동철(Dong-Chul, Kim) 한국정보과학회 2016 한국정보과학회 학술발표논문집 Vol.2016 No.12

질감 특징을 통한 대장선종 조직 분석

송재원(Jae-Won Song),이주홍(Ju-Hong Lee) 한국정보과학회 2013 한국정보과학회 학술발표논문집 Vol.2013 No.6

상피 종양 진단을 위한 병리진단 프레임워크와 췌장선암의 적용 예

송재원(Jae-Won Song),이주홍(Ju-Hong Lee) 한국정보과학회 2013 정보과학회 컴퓨팅의 실제 논문지 Vol.19 No.6

본 논문은 상피조직에서 발생하는 종양진단을 위한 자동화된 병리진단 프레임워크를 제안한다. 제안된 프레임워크는 병리적 지식을 기반으로 주어진 조직영상을 내강, 상피세포, 그리고 비-상피세포 영역으로 분할하고, 각 분할된 객체들의 형태학적 특징들을 추출함으로써 상피조직에서 발생하는 종양에 대한 정량적인 병리진단의 기반을 제공한다. 우리는 제안된 프레임워크의 적용가능성을 보이기 위해 췌장암의 90%를 차지하는 췌장선암의 진단 문제에 적용하였다. 병리진단은 병의 발생 부위 및 병의 종류에 따라 진단 방법이 다르고 검토되는 특징들도 다르다. 따라서 본 논문은 분할된 객체들에 대한 기본적인 형태학적 특징들과 함께 췌장선암을 진단하는데 필요한 특징들을 추출하고 그 특징들을 이용하여 췌장선암 진단을 수행하는 예를 보여준다. 제안된 진단 프레임워크는 상피조직을 포함하는 선암이나 낭성종양 등의진단을 위한 조직세포 영상 기반의 진단 프레임워크를 제공 할 수 있을 것이다. This paper proposes a framework for automated pathology diagnosis of neoplasm that occurs in epithelial tissues. The proposed system segment a tissue image into lumen, epithelial cell, and non-epithelial cell based on pathological knowledge and extracts morphological features from segmented objects. It provides a basis to quantitatively diagnose neoplasm occurring in epithelial tissue. In order to prove the applicability of the proposed framework, we conduct experiments for diagnosing pancreatic ductal adenocarcinoma occurring in epithelial tissue. The pancreatic ductal adenocarcinoma accounts for 90% of pancreatic cancer. There are various diagnostic methods and characteristics to be analyzed according to each lesion and tumor type. In this paper, we extract new morphological features for diagnosing pancreatic ductal adenocarcinoma with classical morphological features from segmented objects and shows practical example to diagnose pancreatic ductal adenocarcinoma that is the neoplasm occurring in epithelial tissue. The proposed framework will provide a foundation for diagnosing the neoplasm occurring in epithelial tissue such as adenocarcinoma, cystic tumor, and so on.

진동 방지기를 갖는 화강암 광탁자의 설계 및 제작

송재원(Jae-Won Song),유상대(Sang-Dae Yu) 대한전기학회 1987 대한전기학회 학술대회 논문집 Vol.1987 No.7