멀티센서를 이용한 제어시스템의 제작 및 응용

정재업,이성필 경남대학교 신소재연구소 2003 신소재연구 Vol.15 No.2

안정적인 특성을 갖는 습도센서(TiO_92)-V_(2)O_(5), Cr-(2)O_(3))와 저온에서 동작 가능한 환원성 가스센서(SnO_(2)-Pt)를 제작하고, 상업용 온도센서를 사용하여 이들을 조합한 멀티센서를 제작하고, 각각의 센서가 가지는 장 ? 단점을 상호 보완하여 센서 제어 시스템을 제작하였다. 마이크로웨이브 오븐 내에서 해동조리의 자동제어를 위해 본 연구에서 제작한 센서들을 설치하여 그 특성을 평가한 결과, 소량의 돈육은 가스, 습도센서 모두 조리 상태를 판단하기 어려웠고, 450g의 돈육은 가스센서가 상대적으로 조리 상태를 잘 판단할 수가 있었고, 600g의 이상에서는 가스, 습도센서 모두 적용이 가능함을 알수 있었다. The humidity sensors(TiO₂-V₂2O_(5), Cr₂2O₃) with a stable characteristics and gas sensors(SnO₂-Pt) operating at room temperature have been fabricated and a multi-functional sensor system which has gas sensor, humidity sensor, temperature sensor and control circuit system has been applied to the microwave oven. For a suitable cooking state, the gas sensor was more applicable to 450g pork meat, and the gas sensor and humidity sensor both could be applicable to pork meat more than 600g.

구분모우드합성법을 이용한 판의 모우드해석

정재훈,박영필,유원희 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2

Component mode synthesis which is one of substructure synthesis methods is studied for the determination of vibration characteristics of plate problem. Comparisons are made in terms of accuracy and computational efficiency. As a result, computation time of component mode synthesis is much shorter than that of whole structure analysis. In lower modes natural frequencies obtained from component mode synthesis are almost equal to those obtained from whole structure analysis, but in higher the differences of results obtained from two methods are increased.

심장내로 연장된 정맥내 평활근종증 1예 : 심장내 평활근종증 intracardiac leiomyomatosis-case report and literature review

정재헌,민필기,박소영,변영섭,홍그루,임세중,심원흠 대한내과학회 2003 대한내과학회지 Vol.65 No.2

정맥내 평활근종증은 병리학적으로는 양성 질환이나 진행 양상은 악성으로 모든 종양의 적출술이 시행되어야 하며, 자궁적출술시 병리학적으로 정맥내 평활근종증을 진단받은 경우 정기적인 검사를 통해 종양의 재발이나 하대정맥과 심장내로의 연장을 확인하여야 한다. 우측 심장내 종양이 발견된 경우는 점액종을 포함한 원발성 심내 종양 외에도 다른 원인 질환을 확인하여야 하며, 반드시 정맥내 평활근종증을 감별진단하여야 한다. Intravenous leiomyomatosis is a rare benign vascular tumor defined as the extension into venous channels of a histologically benign smooth muscle tumor arising either from a uterus or from the walls of uterine vessels, and about 10% spread to the heart. The treatment of choice is complete resection of the tumor. Hormonal therapy should be considered in cases of unresectable residual tumor. A 46-year-old woman was admitted for abdominal discomfort and pain. She was found to have intravenous leiomyomatosis of the uterus with extension into inferior vena cava and right atrium. The patient underwent surgery employing simultaneous sternotomy and laparotomy. Radical excision was achieved using cardiopulmonary bypass. We herein describe a patient in whom complete removal of intravenous leiomyomatosis with cardiac extension was successfully performed.

建물周圍의 2次元 流動場에 관한 數値解析

정재욱,원성필,이동환 울산대학교 1987 연구논문집 Vol.18 No.2

建物周圍를 지나가는 공기는 비나 눈 또는 굴뚝의 연기, 먼지 등을 운반하며, 建物內部의 通風시스템을 교란하고 建物의 冷暖房에도 영향을 끼친다. 따라서 本 硏究에서는 바람이 끼치는 영향을 조사하기 위해 간단한 사각형의 단면을 가지는 單一建物의 경우와 複數建物이 있는 경우의 2次元 流動場을 有限差分法으로 解析하였다. 이 硏究는 單一建物 周圍의 流動場 解析結果를 확장하여 複數建物周圍의 流動場을 解析하는데 主目的이 있다. 數値解析 結果, 單一建物인 경우에는 旣存의 實驗結果와 잘 一致하였으며, 複數建物인 경우에는 隣接한 建物의 높이 및 建物사이의 떨어진 거리에 따라 流動場은 큰 영향을 받음을 알 수 있다. Air around a building carries snow or chimney smoke and upsets the internal ventilation system through the infiltration effect. Therefore, infiltrated air affects the heating and cooling system directly. In order to investigate the effects of 2-dimensional wind, flow field over single building with rectangular shape has been analyzed by the finite difference method. The analysis has been extended to the case of two adjacent buildings. This study shows that the results of numerical analysis in single building coincide qualitatively with the earlier experimental results and in the case of two adjacent buildings, the height of backward building and the distance between building effects the flow field.

측두하악관절염에서 발생한 희귀한 골화현상

신미정,안상헌,박재범,장헌수,김종필,안재진 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.2

Osteoarthritis is a noninflammatory degenerative disease affecting the articular surfaces and is accompanied by remodeling of the underlying bone. The sympotms of osteoarthritis of the temporomandibular joint are pain in the joint and muscles of mastication, limitation. Osteoarthritis is generally accepted that several factors can contribute to the trauma, aging process, internal derangement and MPDS. Radiographic features of the osteoarthritis are seen flattening of joint, sclerosis on flattened area and osteophyte or anterior lipping. In the past, osteoarthritis was considered to self-limiting disease. Currently, synovial chondro-membrane is part of the process of osteoarthritis secondary to trauma. Synovial chondromatosis is an uncommon disease of cartilaginous transformation of synovial membrane with formation of loose bodies within the joint space. The pathogenesis in more an active metaplastic than a neoplastic process. The cause of synovial chondromatosis is unknown. Although trauma and inflammation have all been cited as possible factors in tis pathogenesis. The clinical sign and symptoms are unilateral swelling of the joint region, pain in the joint area and crepitus seem to be the most reliable signs and symptoms. Radiographic evidence of loose bodies may or may not be present. This is a case report of 66 year old female with synovial chondromatosis, that is advanced disease of the osteoarthrits. We treated patient with surgical excision of lose bodies, diskectomy and synovectomy. The defected articular fossa area was reconstructed with temporalis fascia flap. The result was satisfactory.

C. albicans의 Gentian-violet 及 Garlic juice에 對한 耐性形成에 關하여

鄭在奎,鄭弼壽,金正壽 慶北大學校 1962 論文集 Vol.6 No.-

In the previous report, the resistance of oral candida sp. from various age groups to garlic juice were examined and no marked difference in resistancy level within age group was found. To affirm this result in vitro, C. albicance was contacted with gentian violet and garlic in various manner and observed the resistance formation against these agents. It was found that C. albicans did not form resistancy to antifungia lagents easily. 1) C. albicans was subcultured for 20 generations in the series of sensitivity assey media and the resistancy level was raised to gentian violet by 8 times, and to garlic juice by 4 times respectively. 2) Inapparant resistant variants were appeared in the culture of minimal dose of drug containing media. according to the period of culture. 3) Resistant colonies on the solid media were not segregated by one step raise in resistance.

TNF-α 유전자형과 방광암과의 관계

정필두,김은정,엄민식,서정원,윤석중,김종석,이상철,김원재 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적: TNF-α는 일부 종양의 종양화 과정과 관련이 있는 것으로 알려져 있다. 본 연구는 TNF-α 발현에 영향을 미치는 TNF-α 촉진자 -308 부위의 유전적 다형성이 방광암과 관련이 있는지 유무를 알고자 시행하였다. 대상 및 방법: 유전자 분석을 위하여 환자 113명 및 대조군 109명으로부터 혈액을 채취하여 genomic DNA를 분리한 후 PCR-RFLP 및 direct DNA sequencing을 통하여 TNF-α유전자의 다형성을 조사하여 방광암의 발생, 병기 및 분화도와 비교 검토하였다. 결과: TNF-α 촉진자 -308 부위의 유전형은 대조군에서는 GG형이 83.5%(90례 및 GA형이 16.5%(19례)로 관찰되었으며 AA형은 없었다. 환자군에서는 GG 형이 85.4%(97례), GA형 및 AA형은 각각 13.1%(15례)및 0.8%(1례)에서 관찰되었다. 두 군 모두에서 GG형이 가장 많이 나타났으며 다음으로 GA형을 보이고 AA형은 1례의 방광암 환자에서만 관찰되었다. -308부위의 경우도 두 군 사이에 유전자형의 차이는 없었다(p=0.259) 분화도별 분포를 보면 grade I이 20례, grade II가 49례, grade Ⅲ은 34례였고 병기별로 표재성인 경우가 90례였으며 침윤성은 14례였다. 분화도가 나빠질수록 GA형이 증가하였다(p=0.04). 그러나 병기와 TNF-α promoter -308부위의 유전자형 사이에는 유의한 상관 관계가 없었다(p=0.123). 결론: 방광암 환자의 혈액에서 GA genotype이 관찰되는 경우, 분화도가 나쁠 가능성이 매우 높기 때문에 좀 더 적극적인 치료와 세밀한 추적관찰을 함으로써 방광암으로 인한 사망과 암의 진행을 예방할 수 있을 것으로 기대한다. Purpose : Tumor necrosis factor-alpha (TNF-α) is involved in tumorigenesis of several cancers as an endogenous tumor promoter. The purpose of this study was to investigate whether genetic polymorphism of TNF-α promoter region (-308) was associated with human bladder tumor. Materials and Methods: The DNA from 113 and 109 respective blood samples of bladder tumor Patients and control group was analyzed by PCR-based restriction fragment length polymorphism (RFLP) and direct DNA sequencing methods to characterize the genetic polymorphism of -308 promoter region of the TNF-α gene in bladder tumor patients. We compared the association of bladder tumor with genetic Polymorphism of TNF-α promoter region(-308) in relation to the stage, grade, recurrence and progressio. Results : Eighty-six percents(97/113) of bladder tumor patients and 83.5% (90/109) of control group showed genotype GG at -308 region of TNF-α. Difference in genetic variations of TNF-α promoter (-308) did not exist between bladder tumor patients and control group(p=0.259). Tumor grade was significantly related to the GA genotype (p=0.04). The higher is the grade in bladder tumor, the more frequent was the GA genotype. Tumor stage, recurrence and progression were not significantly associated with genetic polymorphism of TNF-α promoter region (-308). Conclusion: The GA genotype of TNF-a promoter region (-308) had a significant impact on TNF-α production and was related to higher grade tumor compared to GG genotype. TNF-α serum levels in bladder tumor patients were significantly higher than controls. These data suggested that TNF-α might involve the tumorigenesis of the bladder rather than treatment or prevention of bladder tumor.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1994)

김재홍,안진균,정성재,김영태,김중환,김시영,이석종,이홍렬,서호석,김경훈,권혁진,정우권,고우석,이용석,안필수,오준규,오용섭 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.1

Background : In recent years gonorrhoea has been panendemic and remains one of the most common Sexually Transmitted Diseases in the world, especially in developing countries. Objective & Method : For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria Gonorrhoeae(PPNG), Ive have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1994, 168 strains of N. gonorrhoeae were isolated, among which 109 (64,9% ) were PPNG. Conclustion : Our results suggests that the prevalence of PPNG in Seoul is still increasing.

국어과 협동 학습의 의미와 방법

이재승,정필우 청람어문교육학회 2003 청람어문교육 Vol.27 No.-

이 글은 국어과 협동 학습의 중요성과 구체적인 방법을 다루고 있다. 협동 학습은 한 마디로 일정한 구성원들이 공동의 학습 목표를 설정하고 그 목표에 도달하기 위해 동등한 입장에서 책무를 가지고 문제를 해결해 나감으로써 구성원 모두에게 유익한 결과를 산출해 내고 결과에 대해 공동의 평가를 강조하는 학습 형태이다. 이렇게 협동 학습은 공동의 목표를 갖는다는 점, 구성원 모두가 동등한 입장이라는 점, 개인의 책무성이 강조된다는 점, 모두에게 유익한 결과를 산출하고자 한다는 점, 결과에 대해 공동으로 책임을 진다는 점 등에서 일반적인 학습 형태와는 구별된다. 이 글에서는 국어과에서 협동 학습법의 뜻과 그 중요성을 다루었다. 그런 다음 국어과 협동 학습법을 적용할 때 유의해야 할 원리를 제시했다. 이는 학교 현장에서 협동 학습을 적용하는 데 하나의원리가 될 수 있을 것이다. 이어 국어과의 협동 학습법의 유형으로 배분 학습법, 상호 교수법 등을 제시했다. 그런 다음 각 협동 학습법을 적용할 때의 지도 절차를 살펴보았다. 그리고 협동 학습법의 적용에서는 교수 학습 과정안을 제시함으로써 협동 학습법의 적용 모습을 그려보는 데 도움이 될 수 있게 했다. Korean Language Learning can be achieved by the interaction of the Language among the students. Just as Vygotsky pointed out, the importance of 'social language' and 'role of adult and peer', Korean learning process can be done by the talking with the able student or a teacher, and by the established scaffolding which they communicate between little master and student, between a teacher and students. Accordingly, Cooperative Learning makes students play active roles in their Korean Language Learning.. Because one of the traits of Cooperative Learning is that the member of the group are from heterogeneous groups, Cooperative Learning evokes language interaction actively. 'Teaching According to students level' which the Seventh Korean Language curriculum point, aims individual teaching on the ground of the homogeneous traits of the student. But the social interaction of language which can be active among the heterogeneous groups will be diminished if we devide the student into able and poor group.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.