한국 근해 대형 선망 어선의 복원성

함상준 ( Sang Jun Ham ),강일권 ( Il Kwon Kang ),김형석 ( Hyung Seok Kim ),조효제 ( Hyo Jae Jo ),김정창 ( Jung Chang Kim ) 한국어업기술학회 2011 수산해양기술연구 Vol.47 No.3

Marine casualties of vessel are said to be in most case caused by human error, but it would be valid for the assumption that the ship is built with high quality and then should be acceptable to the safety standards. It means that the inherent characteristics of a ship should be the first consideration on the safety of ship. Therefore it is basically necessary for navigator to grasp the inherent stability of his ship and ensure that the ship complies with the minimum statutory standards of stability. This study is to realize the stability of the Korean offshore large purseiner varying with loading conditions by the inclining data and some calculations. The author compared the stability of the ship with IMO criteria and domestic rule, and proposed some improvement for the safety of the ship. The results are summarized as follows ; The values of GM of the ship according to the loading condition in navigation satisfy both of the IMO criteria and the domestic rule, but in case of the area under the GZ curves between the heel angles of 30。and 40。, and the heel angle occuring the maximum righting lever not satisfy the IMO rule at the fishing ground departure and arrival conditions in the haul in net situation. The initial metacentric height of the ship is very large, but the range of stability and the occurring angle of the maximum GZ are very small, so even small inclining can bring about the beam end. The best method of improvement for that is to increase the freeboard of the model among the variables.

고속수송용 권선형 선형 동기 전동기의 파라미터 변화에 따른 특성 분석

함상환(Ham Sang-Hwan),이형우(Lee Hyung-Woo),박찬배(Park Chan-Bae),진창성(Jin Chang-Sung),이기덕(Lee Ki-Doek),이주(Lee Ju) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

This paper describes characteristic analysis of linear synchronous motor (LSM) with variable parameters. Linear motor does not use the mechanical coupling for the rectilinear movement. Therefore, structure of linear motor is simple and robust as compared with the rotary motor [1]-[4]. LSM produces the thrust force by interaction between the magnetic field and armature current. There are two types by field location, short primary type and long primary type. In this paper, long primary type LSM is considered for design and characteristic analysis. For characteristic analysis of LSM, analytic and numerical methods are applied. Analytic method for solving the magnetic field distribution of the analytic model is based on the Maxwell’s equations. Using the characteristic equation and equivalent circuit, we analyze the effect of variation of parameters, and then we validate the result by comparing with numerical method by finite element method (FEM). First of all, we design the LSM for transportation system. In a design step, we analyze the characteristics of LSM and it has influence on design parameters. We also apply the equivalent circuit to analysis and to design. And we compare that dc field winding of long stator type LSM is replaced with permanent magnet. We analyze the effects according to changing shapes of shoe in dc field pole and shapes of permanent magnet. And we analyze thrust force, normal force, and back-emf by changing of material of poles, ratio of pole pitch to slot pitch in the stator, load angle, and so on. In conclusion, we compare the analytic method with numerical method for analyzing the effect by variable parameters. This result will be useful of design and forecast of performance without FEM.

회전기 타입의 시험기가 LIM의 추력 특성에 미치는 영향

함상환(Sang-Hwan Ham),원성홍(Sung-Hong Won),이성구(Sung-Gu Lee),조수연(Su-Yeon Cho),김윤성(Yoon-Sung Kim),이주(Ju Lee) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.7

유황별 유속측정 방법에 따른 유효성 연구

함상인 ( Sang In Ham ),이정환 ( Jeong Hwan Lee ),김대영 ( Dae Young Kim ),하돈우 ( Don Woo Ha ),김윤수 ( Yoon Soo Kim ),정강영 ( Kang-young Jung ),이영재 ( Yeong Jae Lee ),김경현 ( Gyeong Hyeon Kim ),김영석 ( Young Suk Kim ) 한국물환경학회(구 한국수질보전학회) 2018 한국물환경학회지 Vol.34 No.5

There are differences in method and cycle of flow rate survey depending on purpose of the operating department. To verify and use results of flow data according to the purpose, flow data of the directly measured and tele monitoring system were compared to verify validity. Flow measurement in the Ministry of Environment is aimed at setting up a standard flow of target water quality for water quality management and securing flow data of low and normal water level seasons for water quality evaluation. In this study, correlation analysis result (R²) of same time zone data by direct measurement and tele monitoring system (TMS) at Seombon D point, a unit watershed of Seomjin river, for six years ('10 ~ '15) according to implementation of Total Daily Maximum Load (TDML) was wading 0.716, boating 0.962 and on bridge 0.943, and effectiveness of measurement method was verified by characteristics of flow duration as a season of dry and low-water; normal and high water are appropriate for wading, boating, and on bridge respectively. Results revealed it is reasonable to use directly measured results using the wading and boating method for low water level and dry seasons, and TMS data for rainy seasons. It can be used important data for future policy decisions.

산화부상기를 이용하는 축산분뇨처리 방법의 수질정화효율 분석

함상인 ( Sang In Ham ),이정관 ( Jung Gwan Lee ),박민정 ( Min Jung Park ),이병희 ( Byong Hi Lee ),이용운 ( Yong Woon Lee ) 한국환경분석학회 2006 환경분석과 독성보건 Vol.9 No.2

당뇨병성 케톤산증의 임상적 고찰

함상수 ( Ham Sang Su ),김욱 ( Kim Ug ),박신성 ( Park Sin Seong ),서영일 ( Seo Yeong Il ),임성희 ( Im Seong Hui ),김병태 ( Kim Byeong Tae ),최문기 ( Choe Mun Gi ),장연복 ( Jang Yeon Bog ),유형준 ( Yu Hyeong Jun ),박성우 ( Park Seo 대한내과학회 1993 대한내과학회지 Vol.44 No.5

연구배경 : 한국인 성인 인슐린의존성 당뇨병의 특성을 알아 보고자 최근 5년간 경험한 당뇨병성 케톤산증의 역학적 특성과 임상상을 분석하였다. 방법 : 전형적인 당뇨병성 케톤산증의 임상상을 나타내고 내원시 혈당치가 250㎎/dl 이상이며 케톤뇨나 케톤혈증이 있고 동맥혈중 pH가 7.34미만인 당뇨병성 케톤산증 72예를 분석하였다. 결과 : 1) 당뇨병성 케톤산증 환자의 남녀비는 1 : 1.25로 여성우위를 나타내었도 젊은 층에서 많이 발생되었으면 전체 평균연령은 36.6세였다. 2) 당뇨병성 케톤산증 발생의 월별 발병수는 3월과 12월에 가장 많았고 6월에 가장 적었다. 3) 당뇨병의 평균 유병기간은 5.4년이었고 당뇨병성 케톤산증이 당뇨병의 첫 임상발현이었던 경우는 23.6%이었다. 4) 발병유발인자로는 감염과 인슐린 투여중지가 가장 많았으며 26.4%에서는 뚜렷한 유발인자를 찾을 수 없었다. 5) 내원시 다뇨 및 다갈, 호흡곤란, 오심과 구토, 복통등의 증상이 주로 있었고 이학적 검사상 Kussmaul 호흡, 빈맥, 저혈압이 관찰되었으며 내원시 의식상태는 40예(55.6%)에서 명료하였다. 6) 감염증이 동반되었던 24예와 감염증이 없었던 48예 사이에 내원시 체온, 말초혈액 백혈구수 및 중성구 비율에는 차이가 없었다. 7) 내원시 43%에서 고칼률혈증이 나타났고 치료 6시간 후 23%에서 저칼륨혈증이 있었으며, 입원초 시행한 공복혈중 C-peptide치는 2/3에서만 인슐린의존성 당뇨병환자에서 관찰되는 범위로 감소되어 있었다. 8) 치료중 합병증으로는 저혈당이 가장 많았고 저칼륨혈증이 그 다음이었으며 고나트륨혈증, 고칼륨혈증, 혈전색전증, 그리고 성인성 호흡장애증후군 등이 있었다. 9) 사망률은 13.9%였고 고연령, 내원시 심한 질소혈증 예후불량 예측인자로 관찰되었고 사망한 예에서 세균성 폐렴의 빈도가 높았다. 결론 : 한국의 당뇨병성 케톤산증의 역학적 특성이나 임상상은 서양의 경우와 비교할 때 연령 및 남녀분포, 계절분포, 당뇨병성 케톤산증이 당뇨병의 첫 임상 발현인 경우, 발병유발인자들의 비율, 검사소견, 치료 합병증 및 사망률, 그리고 예후인자 등에서 매우 비슷하였다. 이같은 관찰은 한국인 성인에서도 서양의 경우와 비슷한 임상경과를 보이는 인슐린의존성 당뇨병이 존재함을 시사한다. Backgrounds: To characterize tha IDDM in Korea, we analyzed the epidemiological and clinical features of DKA in 72 patients. Methods: Seventy-two cases thoses who met following diagnostic criteria were included in the analysis. 1) Clinical manifestation of typical DKA, 2)Blood glucise level>250 mg/dl, 3) Presence of ketonuria or keonemia, 4) Blood pH<7.34 Results: 1) The occurrence of DKA was higher in the young and infemale. 2) DKA occurred most frequently in colder season with apparent two peaks in March and December. 3) In 23.6%, DKA was the first clinical presentation of diabetes and in the remainders, diabetes wer known to be present for average of 5.4 years. 4) The most common precipitating factors of DKA was infection and omission of therapy was the next. No discernible precipitating factor was found in 26.4% of DKA cases. 5) Polyuria, polydipsia, dyspnea, nausea, vomiting and abdominal pain were frequent accompanying symptoms, and physical finding included Kussmaul breathing, tachycardia and hypotension. The mental stutus of patients were alert in 55.6% of DKA cases. 6) There was no significant difference in the body temperature, PB smear, and % of neutrophis between DKA cases with infection and those without infection. 7) On admission potassium was high in 43%, but low in 23% 6 hours after therapy. In only two-thirds of cases, fasting C-peptide level on admission was decreased in the range of classical IDDM. 8) Hypoglycemia was the most freqeunt complication during the treatment of DKA following by hypokalemia, hypernatremia, hyperkalemia, thromboembolism and ARDS. 9) Mortality of DKA was 13.9% and poor prognostic factors include old age, azotemia, associated bacterial pneumonia. Conclusions: The epidemiological and clinical feautures of DKA in Korea were similar to those in western countries, in respect to female preponderance, age, seasonal distribution, % of debut cases, precipitating fators, initial laboratory findings, complications, mortality and prognostic factors. This observation suggests that although the incidence rate of IDDM is low in Korea, there are cases that take clinical courses very similar to those of western countries.

유소년 축구팀의 체력 및 기본기술 수준과 경기력의 관계

함상헌 ( Sang Heon Ham ) 한국스포츠코칭학회 2015 한국스포츠코칭학회지 Vol.1 No.1

이 연구는 유소년 축구선수들의 체력과 기본기술 수준 및 경기력의 관계를 구명하는데 연구의 목적이 있었다. 이와 같은 연구목적을 달성하기 위해 초등부 전국축구리그 서울특별시 권역리그 참가하고 있는 2개의 팀을 선정하였다. 선정한 팀을 대상으로 주축선수 13명의 체력과 축구 기본기술을 리그 시작 전에 측정 하였으며 경기력은 리그가 끝난 후 평가 하였다. 자료 분석 방법은 SPSS 15.0 Version 통계 프로그램을 이용하여 기술 통계분석과 독립표본 t-test를 실시하였다. 이러한 절차를 통하여 유소년 축구선수들의 체력과 기본기술 수준이 경기력과 상관관계를 분석한 결과 결론은 다음과 같다. 첫째, 유소년 S팀의 측정한 평균치는 505 Agility Test 4.62초, 트래핑 2.38개, 드리블 11.49초, 슈팅 1.08개, 헤딩 .92개로 측정됐으며 유소년 I팀은 505 Agility Test 4.81초, 트래핑 1.62개, 드리블 13.91초, 슈팅 .92개, 헤딩 .62개로 측정됐다. 둘째, 유소년 축구팀의 체력 및 기본기술에 대한 차이는 부분적으로 505 Agility Test(p=.042), 트래핑(p=.017), 드리블(p=.001)에서 통계적인 유의한 차이가 있다. 셋째, 유소년 축구팀의 체력 및 기본기술은 경기력과 상관관계가 있다. The purpose of this study was to specify relationships among youth soccer players’ physical strength, level of basic skills, and athletic performance. In order to achieve this study purpose, two teams participating in the Seoul Metropolitan City league of the national elementary school soccer league in were selected. Targeting the selected teams, main 13 players’ physical strength and basic skills were measured before begging of the league, and their athletic performance was evaluated after the league was over. For a data analysis, a descriptive statistical analysis and independent t-test were conducted by using the SPSS PC+ 15.0 Version statistical program. The study results of analyzing relationships among youth soccer players’ physical strength, level of basic skills, and athletic performance through these procedures are as below. First, the averages of youth S team were 505 agility test 4.62 seconds, trapping 2.38, dribble 11.49 seconds, shooting 1.08, and heading .92, and those of youth I team were 505 agility test 4.81 seconds, trapping 1.62, dribble 13.91 seconds, shooting .92, and heading .62. Second, youth soccer teams’ physical strength and basic skills had partially and statistically significant differences on 505 agility test (p=.042), trapping (p=.017), and dribble (p=.001). Third, youth soccer teams’ physical strength and basic skills had correlations with athletic performance.

단상 LSPM의 설계 및 적용

함상환(Sang Hwan Ham),심재학(Jae Hak Shim),신규재(Kyoo Jae Shin),변황우(Hwang Woo Byun),이주(Ju Lee) 대한전기학회 2011 대한전기학회 학술대회 논문집 Vol.2011 No.10-2

가변 기울기 역전도 알고리즘과 ART 신경망을 이용한 필기체 숫자 인식

함상범(Sang-Beom Ham),윤충화(Chung-Hwa Youn) 대한전자공학회 1993 대한전자공학회 학술대회 Vol.1993 No.11

폭기식 저류조와 초고속 응집 침전공정에 의한 하수의 고도처리 및 Storm Water처리에 대한 연구

함상혁(Sang Hyuk Ham),박세진(Se Jin Park),윤태일(Tai Il Yoon) 大韓環境工學會 2004 대한환경공학회지 Vol.26 No.9