고속열차 내 자기장에 의한 인체 간 모델 및 두부 모델에 유도되는 와전류 계산

한인수(In-Su Han),이태형(Lee Tae-Hyung),박춘수(Choon-Soo Park),김기환(Ki-Hwan Kim) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

In recent society, the electricity is so essential for the human lives. Lots of modern people take many cultural benefits owing to the development of the power systems, the cell phone, the electrical appliances, and etc. However, the problems related to the electromagnetic field generate as the side effects. Examples are the fault in the electric machinery due to the electromagnetic coupling, the fault in the communication devices due to the electromagnetic field around the power line equipments, and the effect upon the human beings due to the electromagnetic field, and etc. In this paper, we measure the magnetic field in the Korea High Speed Train and KTX. We take human liver cross section model and head model, which we make the simulation in-house code with. Finally, we calculate the induced eddy current and discuss the electromagnetic field criteria.

이동진료반(移動診療班) 치료(治療)에 의(衣)한 나종양환자(癩腫樣患者)의 균음전(菌陰轉)에 관(關)한 관찰(觀察)

한인수,Han, In-Soo 대한예방의학회 1974 Journal of Preventive Medicine and Public Health Vol.7 No.2

An observation on bacteriological conversion upon 56 bocteriological positives out of 131 cases of lepromatous leprosy treated by antileprosy morbile service was carried out. Those 131 lepromatous cases were a part of 335 total registered from three Guns of Gangjin, Hwa sun, and Goheung, Cheollanamdo, since 1957 to 1973 that has been under the control of antileprosy morbile unit. The results obtained are summalized as follows, 1. Lepromatous type was 36.9% of all cases. The ratio of male to female was 4.9 to 1. Age between 30-44, the most productive ages, occupied 38.0% and age over 60 occupied 18.0% of all. 2. 42.7% of lepromatous type was bacteriological positive. 43.1% was for male and 43.1% was for female. Age between 20 to 24 shown the highest positive at 63.7% and followed by aged over 60 (62.5%) and under 19 (60.0%). The lowest one was seen at age between 40 to 44 at 29.2%. 3. Bacteriological positive rate at registration was different in accordance with duration of treatment received befor registration. It came up to the highest 100.0% at the group treated one year before registration. That of the group not received any treatment was 56.4%, and the group received 4-5 years was the lowest at 26.1% 4. Bacteriological conversion rate was 44.6% and 14.3% of all positive casese regressed in bacterial number. 37.5% of all active cases converted bacteriologically within 5 years. 5. Bacteriological conversion rate in group received 1 year treatment before registattion was 66.6%. That in group not received any treatment was 31.8% and group received 4-5 years was 33.3%. 6. Considering of total duration reaseved treatment together with before and after registration, 33.9% of all active cases resulted bacteriological conversion or regression within 5 years.

플라스틱 소재의 고 변형률 인장특성 평가를 위한 홉킨스바(Split Hopkinson Pressure Bar) 측정 장비에 관한 연구

한인수,이세민,김규원,김학성,Han, In-Soo,Lee, Se-Min,Kim, Kyu-Won,Kim, Hak-Sung 한국복합재료학회 2022 Composites research Vol.35 No.3

Split Hopkinson Pressure Bar (SHPB) is a general test equipment for measuring the mechanical properties of high modulus metal and composite materials at high strain rate. However, for the soft plastic material, it is difficult to hold the specimen and achieve dynamic stress equilibrium due to the weak transmitted signals. In this study, SHPB test apparatus were designed to measure accurately the high strain rate stress-strain curve of the soft plastic materials by changing the incident bar materials and the shape of the specimen holder parts. In addition, to verify the high strain-rate tensile strain data obtained from SHPB, the strain distribution of the specimen was measured and analyzed with a high-speed camera and the digital image correlation (DIC), which was compared with the strain history measured from SHPB.

단일 공정을 통한 자동차 내장부품(Door trim)의 신뢰성 향상 연구

정선경(Sun Kyoung Jeoung),이평찬(Pyoung-Chan Lee),유승을(Seung Eul Yoo),김보람(Bo Ram Kim),한인수(In Soo Han),조지현(Ji Hyun Cho) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

최근 자동차 산업에서는 경량화, 친환경, 고감성을 중심으로 자동차용 소재를 연구·개발하고 있다. 자동차의 내장재인 Door trim은 실내장식, 차음, 흡음, 추돌시 탑승자 보호의 기능을 갖는 중요한 자동차 내장부품 중 하나이다. 본 연구에서의 Door trim 제조공정인 단일공정 표피 일체화 기술은 동시 압출-사출 기술(ILC; In-Line Compounding)과 표피 일체화 기술(ISF; Intergral Skin Foam)이 복합된 새로운 개념의 기술이다. 이 기술을 통해 기존 3공정을 단일 공정(ILC+ISF)으로 단순화됨으로서 생산성이 향상될 것으로 기대된다. 또한, Door trim의 개발 소재는 다층의 소재를 단일화하여 재활용이 용이하고 친환경 소재 적용을 통해 환경유해물질(VOCs)이 저감되었다. 단일 공정 표피 일체화 기술을 이용한 Door trim의 내구성을 평가하기 위하여 기계적인 물성과 내환경성을 측정하였다. 소재와 부품에서 요구 물성을 만족하였고 내환경성 평가 결과 자동차 내장부품으로 적용 가능함을 확인하였다.

TLM 방법을 이용한 한국형 고속열차내의 전자계 해석

한인수(Han In-Su),한영재(Han Young Jae),이태형(Lee Tae-Hyung),박춘수(Park Choon Soo),김기환(Kim Ki Hwan) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

As the industry develops, they are interested in the fault of electric machines and the effect on human beings by electromagnetic fields and waves which generate through much use of electric machines and appliances. In foreign country, they confirmed the standard about electromagnetic interference and compatibility(EMI/EMC) of electromagnetic fields and waves generating electricity transmission/distribution equipments and electric appliance. In Korea, such criteria are applied too. Before EMI/EMC standard is applied, it is important to prepare the plan to predict and reduce electromagnetic fields and waves which generate in the inner and the outer part of electric machinery. To solve such a problem, they calculated Maxwell"s equations by finite element method(FEM) and finite difference method(FDM) in most papers. However, these methods have the disadvantage that mathematical expansions are complex and need much memory allocations for grid and mesh generations In this paper, we introduce transmission line matrix(TLM) method that media of which trains consists are regarded as transmission lines for electromagnetic field calculation in Korean High Speed Train, calculate the electric and magnetic field, and analyze the results.

산모의 다중예측 인자를 이용한 임신 합병증 예후에 관한 다변량분석

한인수(In Soo Han),한정열(Jung Yeol Han),고명인(Myong In Ko),최용관(Yong Kwan Choi),이홍복(Hong Bok Lee),양재혁(Jea Hyuk Yang),류현미(Hyun Mi Ryu),김문영(Moon Young Kim),김은성(Eun Sung Kim),한호원(Ho Won Han) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.8

산모의 다중예측 인자를 이용한 임신 합병증 예후에 관한 다변량분석 목적: Maternal serum markers(AFP, uE3, hCG ), Unexplained down syndrome screen positive에 의한 태아예후를 비교하기위함. 연구방법: 1994년 3월부터 1996년 2월까지 임신 2기에 삼성제일병원을 방문하여 Triple marker test를 시행하고 본원에서 분만 기록이 있는 단태아 5,284례를 대 상으로 하였다. 각 산모 혈청 표지물질들은 radioimmunoassay kit를 이용하여 측정하였고 다운 증후군 스크린 양성은 α-software(Ver. 4.0)를 이용하여 산출하였다. 임신과 관련된 임신 합병증 예후의 기준은 조기태반 박리는 분만시 태반 소견을 기준으로 하였으며, 저체중아는 2500gm 미만, 만삭전 파수는 임신 37주 이전에 조기 양막 파수되는 경우로 하였다. 결과: 검사를 받은 산모의 평균 연령은 30±4.8세이며, 임신횟수는 평균 2.27, 출산횟수는 0.46이며, 검사를 시행한 평균 임신주수는 17.1주이었다. 저체중아는 357례(6.8%), 미숙아는 253례(4.8%), 전치태반은 108례(2.0%), 만삭전 파수는 68례(1.3%), 임신중독증은 66례(1.3%), 조기태반박리 24례(0.5%),자궁내 태아사망은 20례(0.4%)이었다. 이러한 임신 합병증 예후와 산모의 연령 AFP,hCG,uE3,그리고 Unexplained Down syndrome screen positive의 통계적 연관성에 관한 분석에서 35세 이상군은 조기태반 박리, 미숙아, 전치태반에서, AFP 2.0 이상군은 자궁내 태아사망, 저체중아, 임신중독증, 미성숙 조기 양수 파막, 미숙아에서, hCG 3.0 이상군은 자궁내 태아사망, 저체중아, 임신중독증, 미숙아, 전치태반에서, uE3 0.75 미만군에서는 자궁내 태아사망, 저체중아, 미숙아에서만, 그리고 unexplained Down syndrome screen positive에서는 조기태반 박리 , 자궁내 태아사망, 저체중아, 미숙아에서 통계적인 의미가 있었다. 또한 임신 합병증 예후와 관련된 혼란 변수를 조절하고 가장 영향력 있는 인자를 알기위해 multivariate logistic regression을 시행하였다. 자궁내 태아사망은 AFP 2.0 MoM이상, 저체중아는 AFP 2.0 MoM이상, hCG 3.0MoM이상, uE3 0.75 MoM 미만, 임신 중독증은 AFP 2.0 MoM이상, 미성숙 조기 양수 파막은 AFP 2.0 MoM이상, 미숙아는 AFP 2.0 MoM이상, 전치 태반은 35세 이상의 산모군과 hCG 3.0 MoM 이상군에서 P value 0.05 미만으로 통계적으로 의미있는 결과가 나왔으며, 조기태반 박리의 경우 35세 이상의 산모군에서만 P value 0.07이었다. 결론: 임신 합병증 예후를 예측하기위한 예측인자로서 산모의 고령 나이를 비롯해 산모혈청의 AFP, hCG, uE3과 Unexplained Down syndrome screen positive는 모두 다변량 분석에서 통계학적으로 의미가 있으며, 또한 다변량 분석에서는 증가된 AFP이 임신 합병증을 예측하는데 가장 신뢰성 있는 인자임을 알 수 있었다. Purpose : To evaluate a role as over 35 years, maternal serum markers, and a false positive screen for Down syndrome were the predictor of adverse pregnancy outcome. Materials and Methods : From Mar.1994, through Feb.1996, 5284 women were screened triple test to detect Down syndrome in the second trimester and were delivered Samsung Cheil hospital. The values of each maternal serum markers were measured with radioimmunoassay. And then, the screen positive of Down syndrome was calculated using α-software Version 4.0. The adverse outcome of the fetus and the mother included low birth weight(LBW) ( <2500gm), prematurity( <37 gestational weeks), placenta previa, preterm premature rupture of membranes(PPROM), pregnancy induced hypertension(PIH),abruptio placenta, and intrauterine fetal death(IUFD). The predictor markers included over 35years, elevated α-fetoprotein (AFP), elevated human chorionic gonadotropin(hCG), lowered unconjugated estriol (uE3), and a false positive screen for Down syndrome. Results : Mean age and mean gestational weeks in the study were 30±4.8 years and 17.1 weeks respectively. The adverse pregnancy outcomes were 357 LBW(6.8%), 253 prematurity(4.8%), 108 placenta previa(2.0%), 68 PPROM(1.3%), 66 PIH(1.3%), 24 abruptio placenta(0.5%), and 20 IUFD(0.4%). In univariate analysis, over 35 years was significantly associated with abruptio placenta, prematurity, and placenta previa, elevated MS-AFP( >2.0 MoM) associated with IUFD, LBW, PIH, prematurity, and PPROM , elevated MS-hCG (>3.0 MoM) associated with IUFD, LBW, PIH, prematurity, and placenta previa, lowered uE3 (<0.75) associated with IUFD, abruptio placenta, LBW, and prematurity.(P <0.05). In multivariate logistic regression analysis, IUFD was significantly associated with only elevated MS-AFP, LBW associated with elevated MS-AFP, elevated MS-hCG, and lowered uE3, PIH associated with only elevated MS-AFP, PPROM only elevated MS-AFP, prematurity only elevated MS-AFP, and placenta previa over 35 years, elevated MS-hCG.(P <0.05). However, abruptio placenta was not significantly associated with predictor markers.(P >0.05) Conclusions : Some predictors such as over 35 year, elevated hCG, lowered uE3, a false positive screen for Down syndrome were significantly associated with adverse pregnancy outcome. Also in multivariate analysis, we identified especially elevated AFP to be the most reliable predictor for adverse pregnancy outcome.

뉴로 심볼릭 기반 규칙 유도 및 추론 엔진을 활용한 지식 완성 시스템

신원철(Won-Chul Shin),박현규(Hyun-Kyu Park),박영택(Young-Tack Park) 한국정보과학회 2021 정보과학회논문지 Vol.48 No.11

최근 지식 그래프의 불완전성 문제를 해결하기 위한 다양한 지식 완성 연구중 딥러닝 학습 방법과 로직 시스템의 장점을 결합한 NTP(Neural Theorem Prover)와 같은 연구가 기존 연구들에 비해 좋은 성능을 내고 있다. 하지만 NTP는 하나의 입력에 대한 예측 결과를 얻기 위해 지식 그래프의 모든 트리플이 연산에 관여하게 되므로 대용량 지식 그래프 처리에 한계가 있다. 본 논문에서는 NTP의 계산 복잡도 문제를 개선한 모델로부터 심볼의 벡터 표현을 학습하여 규칙을 유도하고, 추론 엔진을 사용하여 유도된 규칙으로부터 지식 추론을 수행할 수 있는 딥러닝 학습 방식과 로직 추론 방식의 통합시스템을 제안한다. 본 논문에서 사용한 규칙 생성모델의 규칙유도 성능 검증을 위해 NTP와 Nations, Kinship, UMLS 데이터 셋을 대상으로 유도된 규칙을 활용한 테스트 데이터 추론가능 여부를 비교하였으며, 대규모 지식그래프인 Kdata와 WiseKB를 사용한 실험에서는 추론 엔진을 통한 지식 추론 결과 실험에 사용된 지식 그래프에 비해 각각 Kdata는 30%, WiseKB는 95%증가된 지식 그래프를 얻을 수 있었다. Recently, there have been several studies on knowledge completion methods aimed to solve the incomplete knowledge graphs problem. Methods such as Neural Theorem Prover (NTP), which combines the advantages of deep learning methods and logic systems, have performed well over existing methods. However, NTP faces challenges in processing large-scale knowledge graphs because all the triples of the knowledge graph are involved in the computation to obtain prediction results for one input. In this paper, we propose an integrated system of deep learning and logic inference methods that can learn vector representations of symbols from improved models of computational complexity of NTP to rule induction, and perform knowledge inference from induced rules using inference engines. In this paper, for rule-induction performance verification of the rule generation model, we compared test data inference ability with NTP using induced rules on Nations, Kinship, and UMLS data set. Experiments with Kdata and WiseKB knowledge inference through inference engines resulted in a 30% increase in Kdata and a 95% increase in WiseKB compared to the knowledge graphs used in experiments.

고속철도내 자기장에 의한 인체 모델에서의 유도 전류 계산

한인수(Han In-Su),이태형(Lee Tae-Hyung),박춘수(Park Choon Soo),김기환(Kim Ki Hwan) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

In recent society, the quality of human life has improved due to the use of electric appliances and the high powered electrical equipments. However, lots of electric appliances and equipments generate the electromagnetic field hazard. Many studies have been made about the wrong behavior of machines due to electromagnetic fields, the interferences in communication equipments, the possibility of the electromagnetic field hazard in human body, etc. There exist international standards about the RF equipments (ex. mobile phone, antenna, etc.). But, many researchers involved in power frequency electric and magnetic field only propose the prudential avoidance. In this paper, induced currents in a human body model due to magnetic fields in high speed railway are calculated by two dimensional impedance method. Power frequency(60㎐) magnetic fields are calculated and induced currents are simulated by Faraday"s law. Induced currents are simulated with induced voltage, human body model impedances due to Ohm"s law, magnetic fields derived from Biot-Savart"s law and Transmission Line Method in high speed railway.

팀 창의성의 영향요인에 관한 연구 : 국내 ICT 연구개발 조직을 중심으로

한인수(In-Soo Han),노풍두(Poong-Du Roh) 충남대학교 경영경제연구소 2019 경영경제연구 Vol.41 No.2

본 연구는 연구개발조직의 창의적이고 혁신적인 연구 성과를 창출을 위한 팀 창의성 영향 요인들을 살펴보는 것이다. 먼저, 구성원 개인 창의성, 팀 다양성, 팀 자율성 등의 선행요인들이 팀 창의성에 미치는 영향을 알아보았다. 둘째, 이들 선행요인들과 팀 창의성의 관계에서 팀 효능감의 매개효과를 살펴보고자 하였다. 셋째, 이러한 팀 창의성과의 관계에서 임파워링 리더십의 조절된 매개효과를 통합적으로 검증하고자 하였다. 이를 위해 본 연구에서는 5개 R&D조직에 종사하는 연구팀을 대상으로 설문조사를 실시하여 521명의 자료가 가설검증을 위해 사용되었다. 주요한 분석결과는 다음과 같다. 첫째, 팀 구성원 개인 창의성은 팀 창의성에 긍정적으로 유의한 영향을 미치는 것으로 나타났다. 둘째, 매개효과 분석에서 팀 효능감이 팀 다양성 및 팀 자율성과 팀 창의성간의 관계를 유의하게 매개하는 것으로 나타났다. 마지막으로, 임파워링 리더십의 조절된 매개효과 분석에서, 팀 자율성이 팀 효능감을 통해 팀 창의성에 영향을 미치는 간접효과가 임파워링 리더십이 높을 때 더 긍정적인 것으로 나타났다. 그러나 이외의 다른 변인에서는 조절된 매개효과가 발견되지 않았다. 이러한 연구결과를 토대로 이론적·관리적 시사점 도출 및 연구의 한계 와 미래의 연구방향을 제시하였다. This study first attempts to investigate the influence that a variety of antecedents, including creativity of individual team members, team diversity and team autonomy have on team creativity for the creative and innovative output in the R&D organizations. Second, it intends to investigate the mediation effect of team efficacy in the relationships established between the antecedents and team creativity. Third, it aims to verify the moderated mediation effect of empowering leadership that occurs in the relationship between the antecedents, team efficacy and team creativity. In this study, a survey has been carried out on researchers working in five R&D organizations where 521 individuals of 102 teams have been selected for the final analysis. The results of this study are summarized as follows. First, creativity of individual team members had a positively significant influence on team creativity. Second, the analysis on the mediating effect demonstrated that team efficacy possesses certain positive qualities in mediating the relationship between individual creativity of team members, team diversity and team autonomy on team creativity. Finally, in the moderated mediation effect analysis of empowering leadership, the indirect effect where team autonomy influences team creativity through team efficacy was more positive when the empowering leadership was high. However, in the rest of the variables, no moderated mediation effect was found. Based on these results, the study also examines the implications of the research in theoretical and managerial perspectives, as well as possible limitations that it may bear, according to which several suggestions are made in regards to the potential direction of future research.

다중벽 탄소나노튜브의 분진폭발 특성

한인수 ( In Soo Han ),이근원 ( Keun Won Lee ),최이락 ( Yi Rac Choi ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.1

가연성 분진이 제조·취급되는 공정에서의 분진폭발 위험성은 항상 존재한다. 그러나 산업현장에서 취급되는 분진에 대한 분진폭발 특성 정보는 아주 미흡한 실정으로 사업장에서는 화학사고 예방대책 수립에 어려움을 겪고 있다. 본 연구에서는 입도분포가 다른 두 종류의 다중벽 탄소나노튜브(MWCNT)에 대한 분진폭발 특성을 실험적으로 조사하였으며, NFPA 499 Code를 적용하여 MWCNT 제조·취급 공정의 분진폭발 위험장소 구분을 검토하였다. 그 결과 평균입도가124.2 μm인 MWCNT 1의 P_max, K_st, LEL, MIE, 및 MIT는 각각 6.3 bar, 56 bar·m/s, 125 g/m³, 1000 mJ 초과 및 650 ℃ 초과로 나타났다. 평균입도가 293.5 μm인 MWCNT 2의 P_max, K_st, LEL, MIE, MIT는 각각 6.2 bar, 42 bar·m/s, 100 g/m³, 1000 mJ 초과 및 650 ℃ 초과로 나타났다. NFPA 499 Code에 따른 MWCNT 1, 2의 폭발강도와 점화감도는 각각 0.35와 0.01 미만으로 나타났기 때문에 MWCNT는 NFPA 499 Code에서 제시된 분진폭발 위험장소로 구분하여야 하는 가연성 분진으로 분류되지 않았다. Dust explosion hazards are always present when combustible dusts are manufactured or handled in the process. However, industries is experiencing difficulty in establishing chemical accident prevention measures because of insufficiency of information on dust explosion characteristics of combustible dust handled in industry. In this study, we investigated experimentally dust explosion characteristics of two kinds of multi-walled carbon nano tubes (MWCNT) different in particle size distribution and examined classification of dust explosion hazardous area for MWCNT manufacturing or handling process by applying the NFPA 499 code. As a result, P_max, K_st, LEL, MIE and MIT of MWCNT 1 having 124.2 μm median diameter are obtained 6.3 bar, 56 bar·m/s, 125 g/m³, over 1000 mJ, and over 650 ℃. P_max, K_st, LEL, MIE and MIT of MWCNT 2 having 293.5 μm median diameter are 6.2 bar, 42 bar·m/s, 100 g/m³, over 1000 mJ, and over 650 ℃, respectively. MWCNT 1, 2 are not categorized as combustible dust listed in the NFPA 499 Code for classification of dust explosion hazardous area because explosion severity and ignition sensitivity of MWCNT 1, 2 are below 0.35 and 0.01, respectively.