황색포도구균의 균혈증에서 초기 항생제 치료가 예후에 미치는 영향

김성한,박완범,이기덕,강철인,최영주,김홍빈,박상원,김의석,오명돈,김의종,최강원 대한감염학회 2002 감염 Vol.34 No.5

다발성 대장암 간전이 환자의 간절제를 위한 새로운 시도

주종우,김형철,임철완,신응진,조규석,유기원,송옥평,홍대식,박성진,조준희,이혜경,김희경,권계원,고은석 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Multiple bilobar liver matastases (MBLM) are the main cause of low resectability in the colon cancer liver metastases. The authors experienced one case of initially non-resectable colon cancer liver metastases. He was curatively and safely treated with a two-stage hepatectomy using the new method of future remnant liver volume growing. A 54-year-old man was referred to our department with the sigmoid colon cancer combined with MBLM, which were checked in two small metastatic lesions in the left lobe and five large sized lesions in the right lobe in the computed tomogram (CT). A laparoscopic assisted anterior resection was primarily performed. We performed the 1^(st) stage hepatectomy 3 weeks after the colon resection. Intra-operative Ultrasonogram (US) found 9 small superficial metastatic lesions in the left lobe. All that lesions were completely removed by non-anatomical wedge resection. An occlusion ballon catheter was placed in the right portal vein through a small branch of the inferior mesenteric vein at that time. The future remnant liver volume was sufficiently increased 3 weeks after the 1^(st) hepatectomy. A right hepatectomy was safely performed 22 days after the 1^(st) hepatectomy. The patient received a regional chemotherapy (interleukin2 based immuno-chemotherapy through hepatic artery) for 4 months, then received 9 cycles of systemic chemotherapy (biweekly Oxaliplation, leucovorin, plus 5-fluorouracil) without any recurrence evidence.

한우에서 인공유발된 제2위내 이물의 초음파상

김명철,변홍섭,박명호,박종오,김종만 충남대학교 수의과대학 동물의과학연구소 1997 動物醫科學硏究誌 Vol.5 No.-

This study was performed to determine the ultrasonographic appearance of the reticulum in the cattle according to the intake of foreign body. Metal balls, magnets, gravels and rubber were administered to a 13 months old female Korean native cattle. After foreign bodies in the reticulum were ascertained, foreign bodies were observed by ultrasonography. The ultrasonographic values in this study can be used as reference for the diagnosis of foreign body of the reculum in cattle.

H 유치원 아동의 우유병우식증 유병율에 관한 조사 연구

김종철,전현철 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.1

The purpose of this study was to know the prevalence and possible etiology of nursing bottle caries in Korea. The study was performed as a preliminary procedure before doing a survey of whole country. Dental caies experience of the 209 children who enrolled in H kindergarten located in Seoul, Korea were examined, and the parents of the children were asked to answer the questionnaire about nursing and oral health habit and socioeconomic status, 71 parents replied the questionnaire. The results were as follows: 1. The nursing bottle caries prevalence of 209 children of H kindergarten(male 97, female 112, age :55-77months) is 13.4%. 2. Average weaning age of 28 children with nuring bottle caries is 21.7±9.7 month, that of 43 children without nursing caries was 18.3±10.6 month. 3. The children with nursing caries had more nocturnal nursing habit history than the children without nursing caries

Achondroplasia환아의 치의학적 소견에 대한 증례보고

김종철,전현철 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.2

Achondroplasia is characterized by undergrowth of long bones and cartilages and by low height. The name of this disease had been called classical chondrodystrophy, dyschondroplasia, chondrodystrophy and micromelia before Parrot reported the term of this disease as Achondroplasia. We are reporting in this paper on an 3-year and 4-month-old boy with achondroplasia. The dental findings are as follows : 1. Open bite and relatively mandibular prognathism were observed in the front teeth. 2. The size, number, shape, structure of the teeth were usual and the tongue was a little bigger than the normal. 3. The metacarpal bones were short and broadening. Mesial, distal border of the prox. phalanges were irregular and also trabecular pattern was abnormal in the hand-wrist P-A view. 4. According to lat. cephalometric analysis, the cranial basis was underdeveloped.

우유병 우식증 아동에서 불소와 chlorhexidine양치액의 S.mutans와 Lactobacillus 억제 효과에 관한 실험적 연구

김종철,전현철 大韓小兒齒科學會 1995 大韓小兒齒科學會誌 Vol.22 No.1

Nursing caries is a specific form of rampant caries in preschool children. It is characterized by the initiation of upper anterior teeth, the development of primary molars while the usual absence of decay of lower anterior teeth. A causative factors are necessary for nursing caries to occur - host, substrate, microorganism and time. Removal of this causative factors is mostly effective to prevent nursing caries. The purpose of this study was to evaluate the anticariogenic action toward Streptococcus mutans and Lactobacillus between 3 and 4-year old children with nursing caries. Fifteen subjects (male 8, female 7) were selected, ordered mouthrinsing once a day before going to bed with 0.05% fluoride and 0.1% chlorhexidine solution and plaque from their tooth surface were cultured and the colony was counted. The results of this study were as follows : 1. Comparing with pretreatment count, in the chlorhexidine-treated and the fluoride-reated group, S.mutans were reduced significantly in the carious and white spot lesion (p<0.05). While S.mutans level of fluoride-treated group was not significantly different from that of sound tooth surface. (p>0.05). 2. In the chlorhexidine-treated and the fluoride-treated group, S.mutans levels were recovered to original status after ceasing treatment. 3. In all groups, Lactobacillus were reduced during experimental periods in the carious and sound tooth surface while those of chlorhexidine-treated and fluoride-treated group had a tendency to increase after ceasing treatment. 4. The use of chlorhexidine and fluoride is effective to short-term reduction of S.mutans and lactobacillus in "high risk" children.

齒根膜內 痲醉가 成犬의 齒周組織에 미치는 影響

金哲鎭,卞種秀,李相韓 慶北大學校 齒科大學 1985 慶北齒大論文集 Vol.2 No.1

The purpose of this experimental study was to determine if periodontal tissues were damaged by the periodontal ligament injection administered by a pistol-type syringe, and if so, whether there would be subsequent repair. The periodontal ligament injections of 2% lidocaine with 1:100,000 epinephrine or normal saline were performed under the strong back-pressure at various sites on 3 dogs. Injected areas were examined at one hour, twenty-four hours, one week and two weeks postinjection. Histologic evaluation indicated that the disruption was very slight and was confined to the injected periodontal space and adjacent hard tissues. This slight damaged periodontium showed rapid repair, indicting that the periodontal ligament injection results in minor changes on the periodontium. So, the study would indicate that the procedure is safe to the periodontium.

구륜 이동 로봇의 위치추정을 위한 퍼지-유전자 제어기

한철웅,김종수,류평,오금곤,박세승 조선대학교 전자정보통신연구소 2000 電子情報通信硏究所論文誌 Vol.3 No.1

지능제어 기법중 하나인 퍼지-유전자 알고리즘은 매개변수 불확실성을 갖는 시스템을 제어하기 위한 새로운 제어 기법으로 사용되어지고 있다. 유전자 알고리즘에서, 돌연변이율은 국부적 최소화에 수렴하는 것을 방지하기 위하여 크게 설정하여야만 하지만, 전역 수렴 속도가 감소하는 문제점을 가지고 있다. 이러한 문제점을 개선하기 위하여 퍼지 논리와 유전자 알고리즘을 사용하여 제어기를 설계한다. 본 논문에서는 구륜이동 로봇의 목적궤적을 추적할 수 있는 제어기 설계를 제안한다. 제안된 제어기의 유용성은 모의실험을 통하여 보인다. Genetic algorithms, one of intelligent control methods, is used as new control approach to control the system including the parameter uncertainties In the genetic algorithm, the mutation rate must be set to high to prevent the convergence to local minimum, but it has the problem that the global convergence speed is decreased To enhance this problem, we design the controller by using the fuzzy logic and the genetic algorithm In this paper, we propose the controller design to track to the desired trajectory of the wheeled-mobile robot The validity of the proposed controller is showed through the simulation.

빈곤과 실업의 원인과 복지정책의 효과

안종범,김철희,전승훈 한국노동경제학회 2002 勞動經濟論集 Vol.25 No.1

본 연구는 빈곤과 실업의 결정요인과 상호관계를 살펴보고, 복지정책의 효과를 분석해 본다. 특히, 빈곤가구와 가구주의 특성, 가구주의 경제활동상태변화 및 이들 변수에 영향을 미치는 결정요인을 분석해 본다. probit 모형과 bivariate probit 모형을 이용한 실증분석 결과, 빈곤의 주된 원인으로 실업이 작용했고, 가구원수, 가구주의 연령 및 저학력 등도 원인으로 작용했음이 밝혀졌다. 사회보험 수급 등을 포함하는 복지정책은 이러한 실업이 빈곤에 미치는 영향을 축소시키는 요인으로 역할하고 있음이 추정 결과 나타났다. Using 3 years of panel data on nearly 3,507 households, the Korea Labor Income Panel Survey(KLIPS) data, the authors measure the determinants of poverty and unemployment, and the extents to which poverty influenced unemployment. The probit analysis of unemployment shows that unemployment probability is lower, when male, lower age and is higher, high-school and over junior college, work duration is over 3 years. The probit analysis of poverty shows that poverty probability is lower, when male, higher education level, longer career, specially unemployment and social insurance is determinants of increasing poverty. Bivariate probit model of unemployment and poverty also provides similar findings to those probit analysis and shows an evidence of the influence of unemployment on poverty along with the positive role of social welfare policy such that social welfare receipt reduces the impact of unemployment on poverty.

Mathieu 函數를 利用한 波浪의 廻折에 관한 硏究

片宗根,李庸揆,金鐵 명지대학교 공학기술연구소 1987 공학기술연구소 논문집 Vol.2 No.-

Calmness in water condition inside a harbor is a great concern for port engineers. Therefore it is necessary to predict wave diffraction in a harbor reasonably. Available diffraction diagrams for wave diffraction through a breakwater gap or beyond an island breakwater are less satisfactory and still incomplete. In this paper, as a fundamental study, the programs to compute wave diffractions through a breakwater gap or by an island breakwater are developed by using the Mathieu functions. The wave diffraction diagrams in the dimensionless wiegel format, drawn from these programs, can be used well for preliminary design purposes.