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Formula SAE 차량의 선회 성능 향상을 위한 스프링 및 댐핑 강성 최적 조합에 관한 연구
정택용(Taek Yong Jeong),이준영(Jun Young Lee),임홍재(Hong Jae Yim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this paper, a methodology for optimal combination of spring and damper characteristics to improve the cornering performance of a SAE vehicle are studied. First, F-SAE full vehicle model is developed for multi-body dynamic analysis. Then a virtual skid pad course simulation is executed to evaluate the vehicle cornering performance. Design variables are coefficients of damper and spring stiffness in the suspension of the F-SAE vehicle. A parameter study with various combinations of spring and damper stiffness is executed with the skid pad driving simulation. Optimal combination model is found and compared with the F-SAE vehicle base model to show improved cornering performance and lap time.
지속성 외래 복막투석 환자에서 발생한 당뇨병성 근육 경색증
정택균 ( Taek Kyun Jeong ),이연경 ( Youn Kyoung Lee ),정균호 ( Gyun Ho Jeong ),박병석 ( Byong Seok Park ),마성권 ( Seong Kwon Ma ),김수완 ( Soo Wan Kim ),김남호 ( Nam Ho Kim ),최기철 ( Ki Chul Choi ) 대한신장학회 2003 Kidney Research and Clinical Practice Vol.22 No.1
Diabetic muscle infarction (DMI) is a rare condition occurring in subjects with long-standing complicated diabetes mellitus. We report DMI in a 65-vear-old man with type 2 diabetes mellitus undergoing continous ambulatory peritoneal dialysis (CAPD) with review of this condition in the literature. He had been suffered from type 2 diabetes mellitus for 21 years. In 1997, he reached end-stage renal disease and had received on renal replacement therapy with CAPD since then. In June 2002, he presented with sudden and spontaneous onset of severe pain in the right thigh region. He was afebrile, and the right thigh was swollen and tender but not erythematous. Laboratory data on admission included white blood cell count of 15,800/㎣, hemoglobin 9.0g/dL, platelet count 264,000/㎣, BUN 102.3mg/dL, serum creatinine 9.9 mg/dL, fasting blood glucose 85 mg/dL, postprandial 2 hours blood glucose 162 mg/dL, hemoglobin AIC 5.84%, ESR 125 mm/h (it was 52 mm/h one month earilier), CRP 18.9 mg/dL, and normal levels of creatinine kinase. Magnetic resonance imaging (MRI) showed asymmetry of the muscle in T1-weighted images and increased signal intensity involving the medial portion of right thigh (adductor longus, adductor magnus, vastus intermedius muscle, etc) in T2-weighted images with no contrast enhancement. Radioistope venography of the ileo-femoral veins was was normal, excluding deep venous thrombosis as a cause. The right thigh was explored surgically and a biopsy taken from the vastus intermedius muscle was consistent with chronically inflammed scar tissue with no evidence of malignancy. A biopsy taken from the vastus intermedius muscle showed hemorrhagic necrosis of skeletal muscle, with lymphcytic infiltration. Most of the blood vessels appeared normal. The swelling resolved spontaneously following a few weeks of bedrest and analgesia. To our knowledge, this is the first reported case of DMI in patients undergoing renal replacement therapy in Korea.
Sunitinib에 의해 발생한 수족증후군과 수포성 고정약진 1예
정택조 ( Taek Jo Jeong ),이은주 ( Eun Ju Lee ),정기헌 ( Ki Heon Jeong ),신민경 ( Min Kyung Shin ),김낙인 ( Nack In Kim ) 대한피부과학회 2009 대한피부과학회지 Vol.47 No.6
Sunitinib is multitargeted tyrosine kinase inhibitor, and this drug was approved for use to treat gastrointestinal stromal tumor and advanced renal cell carcinoma. It has also been shown to be efficacious in treating neuroendocrine, colon and breast cancer. Sunitinib therapy is often complicated by cutaneous adverse effects such as hand-foot syndrome, hair depigmentation, subungal splinter hemorrhage, xerosis, alopecia and seborrheic dermatitis-like reactions. But there have been no reports on patients presenting with a bullous fixed drug eruption associated with sunitinib administration. We report here on a case of a bullous fixed drug eruption and hand-foot syndrome, and these maladies were caused by this agent. (Korean J Dermatol 2009;47(6):739∼742)
결절성 병변과 반피부위축증양 병변을 함께 보인 융기피부섬유육종
정택조 ( Taek Jo Jeong ),신민경 ( Min Kyung Shin ),이무형 ( Mu Hyoung Lee ) 대한피부과학회 2009 대한피부과학회지 Vol.47 No.3
Atrophic dermatofibrosarcoma protuberans (DFSP) is an uncommon clinical variant, which clinically mimics other atrophic dermatological conditions. Given the typical `protuberant` morphology of DFSP, such atrophic lesions may be difficult to diagnose clinically. We report a 44-year-old man who presented with an 8-month history of an asymptomatic, depressed, anetoderma-like plaque on the right subclavicular area. He also presented with a 1-year history of a 1.5×1.5 cm, asymptomatic, firm, erythematous nodule above an atrophic lesion. Biopsy specimens were taken from each lesion. These specimens, along with histochemical staining for CD34, established the diagnosis of dermatofibrosarcoma protuberans. (Korean J Dermatol 2009;47(3):361∼364)
정택상(Taek Sang Jeong),신원섭(Won Sop Shin),연평식(Poung Sik Yeoun),이정희(Jeong Hee Lee),이지현(Ji Hyun Lee) 한국산림휴양학회 2010 한국산림휴양학회지 Vol.14 No.3
본 연구는 학교숲과 초등학교 학생의 특성에 관한 연구를 수행하였다. 연구의 목적은 학생들의 특성에 따른 기질의 차이와 학교숲 특성에 따른 기질에 따른 차이를 파악하고자 수행되었다. 자료수집은 충청북도 내 16개 초등학교에서 443명의 초등학생을 대상으로 수집하였으며 연구결과는 다음과 같다. 1. 학생들의 기질은 6개 요인으로 구성되었으며 다음과 같다. 일반적 활동성 요인(7개 항목), 접근-철회성 요인(6개 항목), 융통-경직성 요인(6개 항목), 기분 요인(7개 항목), 주의 집중성 요인(5개 항목), 지속성 요인(3개 항목). 2. 학생들의 기질은 학생들의 특성 중 성별, 지역별, 학교숲 조성 참여경험에 따라 차이가 나타났다. 3. 학생들의 기질은 학교숲의 특성 중 1인당 학교숲 면적에 따라 차이가 나타났다. This study investigates the effect of school forests on elementary students’s psychological temper. Specifically this study was conducted to investigate the relationship between some characteristics of school forests such as size, species and forest age, etc. and students’ temper. To collect data, 443 students from 16 elementary schools in Chungbuk Province were sampled as respondents. A set of questionnaires were administered each to respondent. The results of data analysis were followings: 1. There were significant differences in students' temper due to their gender, locations of the schools, and students’ use pattern of forests. 2. The characteristics of school forests influenced on different types of students’ temper.
멀티미디어 사서함 구축을 위한 퍼지 기반의 객체 관리기
이종득,정택원,Lee, Jong-Deuk,Jeong, Taek-Won 한국정보처리학회 2001 정보처리학회논문지B Vol.8 No.5
최근에 인터넷과 통신망의 활성화로 인하여 멀티미디어 정보들을 효율적으로 관리하고 서비스하기 위한 여러 가지 방법들의 제안되고 있다. 본 논문에서는 퍼지 기반의 멀티미디어 사서함 구축을 위한 객체관리기로서 $\alpha$-cut 을 이용한 FBOM을 제안한다. 제안된 시스템은 퍼지 필터링을 이용하여 객체들을 고나리하기 위해 객체 분류, 퍼지 필터링, 클래스 생성구조를 이용한다. 또한 제안된 시스템의 성능을 알아보기 위해 1000개의 멀티미디어 정보를 이용하여 실험을 수행하고, 랜덤 키 방법과 FBOM 방법을 비교 분석한다. According to the current increase of the usefulness of information by Internet and Communication network, several methods are proposed in which multimedia information may be efficiently managed and serviced. This paper proposes FBOM(Fuzzy-Based Object Manager) using $\alpha$-cut in Object manager for Fuzzy-Based Multimedia Post-Office Box construction. The proposed system utilizes object discrimination, fuzzy filtering, and class generation structure in order to manage object using Fuzzy filtering. To know how well the proposed system are able to work, this paper have tested against the methods with 1000 items of multimedia information, and our system are compared with Random-key method and FBOM method.
이승주(Seungju Lee),한종우(Jong Woo Han),민지현(Ji Hyun Min),정재현(Jae Hyun Jeong),정택구(Taek-Gu Jeong) 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
마늘은 백합과 알리움속에 속하는 작물로 항암․항균․ 항염, 항산화 활성 등이 보고되어져 있으며, 한국의 주요 양념채소 중 하나이다. 마늘은 화기의 이상발육에 의하여 불임이 발생하며, 이에따라 인편을 통해 영양번식으로 재배된다. 마늘 재배 농가에서는 씨마늘을 자가 생산하여 재배에 활용하게 되는데, 씨마늘은 세대가 진전됨에 따라 주요 특성을 잃어버리는 등 많이 퇴화가 발생된다. 마늘의 주요 바이러스는 Onion yellow dwarf virus(OYDV), Leek yellow stripe virus (LYSV), Garlic common latent virus(GCLV), Allexivirus 등이 보고되었는데, 바이러스에 감염시 잎 모자이크 증상 등이 관찰되며, 이에따라 수확량이 줄어드는 것으로 알려져있다. 또한 마늘은 영양체 작물로 바이러스의 수직감염 위험이 다른 작물보다 큰 실정이다. 이에 충북농업기술원 마늘양파연구소에서 보존하고 있는 마늘 주요 유전자원 200자원에 대하여 Allexivirus의 발병율을 RT-PCR을 이용하여 조사하였다. 바이러스 미발생 자원은 육종에 기초자료로 활용하기 위하여 지상부 및 지하부 생육특성, 병해충 감수성 등을 조사하였다. 바이러스에 감염되지 않은 자원은 200 자원중 7 자원(3.5%)으로 조사되었으며, 금후 다른 마늘 바이러스 미감염 자원을 선발하여 바이러스 저항성 육종을 위한 기초자료로 활용할 계획이다.