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이정규,조대호,Lee, Jung-Gyu,Cho, Tae-Ho 한국시뮬레이션학회 2006 한국시뮬레이션학회 논문지 Vol.15 No.4
현대의 산업공정에서 CAD(Computer-Aided Design)는 설계 및 생산에 관련된 다양한 분야에서 빠져서는 안 될 중요한 분야로 자리매김 하였다. 그러나 생산 설계의 복잡도가 증가 할수록, 그와 관련된 다양한 공학 기술들이 필요로 하게 되었다. 이 논문에서는 CAD기반의 그레이팅 설계 자동화 시스템에서 분할을 고려하는 배치에 대하여 다룬다. 그레이팅 설계 디자인에서 생산 비용 절감의 핵심은 분할을 최소로 하는 디자인을 설계하는 것이다. 이를 해결하기 위하여 그레이팅 분할 배치 문제에 유전 알고리즘을 적용하여 근사 해를 탐색한다. 각 제약 조건들에 우선순위를 두어 적합도를 측정하고, 분할 섹션들을 해 집합으로 구성하여 교배와 선택 연산을 수행함으로써 해를 구하고 시뮬레이션을 통해서 제안된 방법의 효율성을 평가한다. D/In modern production industries, computer aided systems have been improving the efficiency and convenience of the various stages of work. However. as the complexity of computerized production systems increases, various techniques are still necessary. The problem we addressed occurs in computer systems that automatically make manufacturing process plans in the metal grating manufacturing industry. In the grating layout design, the key to saving the manufacturing cost is to find a design with the minimal number of cutting operations. The proposed genetic algorithm explores the feasible alternatives within the space until an optimal solution is obtained.
보안성이 강화된 모바일 지급결제 수단으로써의 금융microSD 프레임워크 연구
이정규(Jung-Gyu Lee),황희성(Hee-Sung Hwang),김학범(Hak-Beom KIM) 한국정보보호학회 2013 情報保護學會誌 Vol.23 No.4
최근 새로운 지불결제 플랫폼인 스마트폰의 등장으로 모바일 금융 결제 비중이 지속적으로 증가하고 있다. 특히 금융microSD는 기존에 사용해오던 USIM의 불편함을 해소하고 보안성을 강화하여, 새로운 모바일 지불결제 수단으로써 IT업계와 금융업계의 지대한 관심을 받고 있다. 이에 금융microSD를 통해 모바일 지불결제가 또 다른 제2의 서비스로 융합하는 단초가 될 것으로 기대하고 있다. 본고에서는 모바일 지급결제 시장 현황 및 서비스 동향과 모바일 지급결제 서비스의 핵심 플랫폼으로 기능하는 Secure Elements(SE)를 유형별로 나누어 살펴보고, 금융 microSD 프레임워크를 분석하여 보안사항 및 활용방안 등에 대해 기술하고자 한다.
유전 및 육종 : 반복모형을 이용한 한우 초음파 측정형질의 유전모수추정
김정일 ( Jung Il Kim ),김병우 ( Byung Woo Kim ),이정규 ( Jung Gyu Lee ),이기환 ( Ki Hwan Lee ),구양모 ( Yang Mo Koo ),송치은 ( Chi Eun Song ),이재윤 ( Jae Youn Lee ),선두원 ( Du Won Sun ),박철현 ( Cheol Hyeon Park ),정용호 ( Yeoun 한국동물자원과학회 ( 구 한국축산학회 ) 2012 한국축산학회지 Vol.54 No.2
본 연구는 한우 암소 초음파 측정자료 특징을 알아보고, 측정형질에 대한 유전모수를 추정하여 육질 또는 육량 개량을 위한 기초자료를 제공하기 위해 수행되었으며, 2001년부터 2009년까지 한국종축개량협회에 의해 측정된 한우 암소 36,893두를 이용하였고, 그 중 반복기록이 있는 개체는 7,913두였다. 유전모수 추정을 위하여 반복개체모형을 이용하였으며, 유전모수추정에는 REMLF90(Miztal, 2001)을 이용하였다. 유전모수 추정 모형의 설정을 위하여 흉위, 영양도 및 초음파 측정치에 대한 출생년도, 출생계절, 측정년도, 측정계절, 측정지역, 측정연령 등의 환경효과를 추정하였다. 반복개체모형으로 추정된 배최장근단면적, 등지방두께 및 근내지방도에 대한 유전력이 각각 0.31, 0.38, 0.27로 나타났고, 다형질개체모형으로 추정한 유전력은 각각 0.02, 0.09, 0.07로 낮게 추정되었다. 반복개체모형을 이용한 반복력은 배최장근단면적, 등지방두께, 근내지방도가 각각 0.46, 0.57, 0.39로 나타났다. 분석모형 간의 추정치의 차이를 비교 할 때 반복모형에서의 유전력과 반복력이 높게 추정되었다. 따라서 반복형질 값을 가진 형질들의 측정치를 표준화하여 한우 암소개량을 위한 기초자료로 활용된다면 유전능력평가와 개량사업 비용절감에 도움이 될 것으로 기대된다. The present study data were obtained from 36,894 cows in Korea Animal Improvement Association from 2001 to 2009 which was subjected for ultrasound measurements(eye muscle area, back-fat thickness, marbling score) and descent. Repeated record models were carried out using 7,913 of 36,894 of total animal traits. The ultrasound measured traits and performance test data were used to study the chest girth, body condition score, eye muscle area, back-fat thickness and marbling score with genetic correlation and parameters for the ultrasound measured traits using REMLF90 program. Genetic correlation of eye muscle area with back-fat thickness, marbling score and back-fat thickness with marbling score were noticed in repeated records animal model as 0.69, 0.54, and 0.59, whereas in multiple trait animal model method were 0.07, 0.66, and 0.39, respectively. Repeated records of animal models were used as positive correlation of traits. Multiple trait animal models were used as negative correlation of eye muscle area with marbling score. The analysis on repeat records of animal models using ultrasound measurements about Korean cattle showed positive effects for each traits. In comparison differences between the repeat records of animal models and multiple trait animal models was found with higher traits of her, the heritability and repeatability was found higher in repeat records animal models. In light of these assessments, carcass traits by ultrasound measurements are expected to help and improve an accurate analysis of each trait and if the research analysis using repeat records of animal models continue when we estimate genetic ability of these traits.
특발성 정맥경화성 대장염: 만성 허혈성 장염의 드문 예
최종민 ( Jong Min Choi ),이강녕 ( Kang Nyeong Lee ),김해수 ( Hae Su Kim ),이상기 ( Sang Ki Lee ),이정규 ( Jung Gyu Lee ),이성원 ( Sung Won Lee ),이오영 ( Oh Young Lee ),최호순 ( Ho Soon Choi ) 대한소화기학회 2014 대한소화기학회지 Vol.63 No.3
Colonic wall thickening is frequently encountered in various conditions, from acute or chronic inflammatory disease to colorectal carcinoma. Colonic wall thickening may be accompanied by calcifications in mucinous adenocarcinoma of the colon, leiomyosarcoma of the colon, schistosomiasis japonica, and phlebosclerotic colitis. Phlebosclerotic colitis is a rare entity of chronic ischemic colitis associated with sclerosis and fibrosis of mesenteric veins. Although its development is usually insidious, and, thus its diagnosis can be delayed, characteristic findings in phlebosclerotic colitis are calcifications of mesenteric veins as well as colonic wall thickening with calcifications. We report on a 71-year-old woman who presented with chronic diarrhea and intermittent hematochezia, who was first misdiagnosed as mucinous adenocarcinoma of the colon, but finally diagnosed as a rare entity of chronic ischemic colitis, phlebosclerotic colitis. Differential points of phlebosclerotic colitis from other diseases, including leiomyosarcoma and schistosomiasis japonica, are also described.
김윤진,Gyu Lee Kim,이정규,이유현,탁영진,Seung Hun Lee,Young Jin Ra,이상엽,Eun Ju Park,Youngin Lee,Jung In Choi,Sae Rom Lee 대한임상노인의학회 2022 대한임상노인의학회지 Vol.23 No.1
Background: Although there have been studies that neck circumference is related to metabolic syndrome and muscle strength, it has not been well studied in the elderly. Therefore, in this study, the relationship between neck circumference and muscle strength with metabolic syndrome was investigated by using handgrip strength measurement in older adults. Methods: The study was conducted with the subjects aged 60 years or older who participated in the first year of the 8th National Health and Nutrition Examination Survey (2019). The neck circumferences were divided into four quartiles. The difference in metabolic indicators, handgrip strength and risk of metabolic syndrome according to the neck circumference was compared. Results: The male group over 75 years of age had a smaller neck circumference than the 60-64 years old group (P<0.001). Absolute handgrip strength (AHGS) and relative handgrip strength (RHGS) gradually decreased with increasing age, and as the neck circumference quartile increases, the odds ratio of metabolic syndrome increases in both male and female older adults. The higher RHGS, the lower the odds ratio of metabolic syndrome (OR: Male 0.42, Female 0.22). Conclusion: In the study, it was found that when the neck circumference of elderly male and female increased, the RHGS decreased and the risk of metabolic syndrome increased. It was also found that the risk of metabolic syndrome decreased as the RHGS increased. The RHGS along with neck circumference also showed potential as an index for risk assessment of metabolic syndrome in the older adults.
조규원(Gyu-Won Cho),이정규(Jung-Gyu Lee),김규탁(Gyu-Tak Kim) 대한전기학회 2012 전기학회논문지 Vol.61 No.12
In this paper, the d, q-axis inductance of IPMSM(Interior Permanent Magnet Synchronous Motor) was calculated by the FEA(Finite Element Analysis). And the CVCT(Current Vector Control Test) was performed, and compared with FEA. Therefore the inductance experiment according to the variation of the current phase angle was performed. However, the error was generated in the fundamental wave detection of the voltage and current waveform. So, error has largely effect on the result of computation, it has to note specially. In addition, by using the calculated inductance, the torque calculation was performed and this result was compared through the dynamometer experiment.