New method for an evaluation of the esthetical improvements resulting from a mandibular angle reduction

Joo-Hwan Kim,Se-Jin Han,Moon-Young Kim 대한구강악안면외과학회 2017 대한구강악안면외과학회지 Vol.43 No.4

Objectives: This paper proposes Han’s ratio as an objective and quantitative comparative result obtained from pre and postoperative data in patients with a mandibular angle reduction. Materials and Methods: Thirty patients, 12 men and 18 women, who visited the Department of Oral and Maxillofacial Surgery with the chief com-plaints of skeletal mandibular prognathism and prominent mandibular angle were selected. The subjects were classified into 3 groups according to the types of surgical procedures involved. Group A consisted of patients who underwent mandibular angle resection and mandibular setback. Group B was comprised of patients with mandibular angle resection, mandibular setback and genioplasty. Group C consisted of patients with mandibular angle resection, mandibular setback, Le Fort I osteotomy, and genioplasty. The landmarks placed in pre and postoperative frontal photographs were used to obtain the Han’s ratio in each group. The Han’s ratios were compared pre- and postoperation and according to the surgical techniques applied. Results: Of the 3 groups who had undergone a mandibular angle resection, all showed a statistically significant increase in Han’s ratio. On the other hand, there was no statistically significant difference based on the surgical techniques used. Conclusion: The ratio of the lateral lower face proposed in this study is a potential indicator of postoperative esthetic enhancement in mandibular angle reduction surgery.

Ga 함량에 따른 Cu(In<SUB>x</SUB>Ga<SUB>1-x</SUB>)Se₂ 태양전지의 특성분석

김석기(Seok Ki Kim),권세한(Se Han Kwon),이두열(Doo Yeol Lee),이정철(Jeong Churl Lee),강기환(Ki Whan Kang),윤경훈(Kyung Hoon Yoon),안병태(Byung Tae Ahn),송진수(Jinsoo Song) 대한전기학회 1998 대한전기학회 학술대회 논문집 Vol.1998 No.7

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.

폐흡충에 의한 무균성 노흉에 대한 돼지꼬리형 도관(pig-tail catheter)을 이용한 치료의 효과

한경택,권세훈,김형호,하재화,선길홍,권용은,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Background: Pulmonary paragonimiasis is caused by consumption of raw or improperlycooked crustacea infected with the laval stage (metacercaria) of Paragonimus westermani. The most characteristic symptoms were rust-colored sputum and cough. Paragonimiasis causes pleural thickening or effusion in 48% of the patients. Pleuro-pulmonary paragonimiasis can be easily overlooked by physicians who do not suspect this disease in the differential diagnosis. Method: We compared the outcomes of 11 patients with paragonimus empyema managed either through thoracotomy or pig-tail catheter drain. These patients were confirmed by food history, clinical and radiological findings, and laboratory data. Results: The male and female ratio was 1.75 : 1, and mean age was 40.0 ± 13.5 years. AII patients had pulmonary symptoms such as cough or chest pain. Serum-ELISA for paragonimiasis were all positive (mean titer was 0.57). AII patients had pleural effusion in radiological findings( 2 patients had bilateral pleural effusion). All patients received praziquantel (75 ㎎/㎏/day for 3days). Two patients were treated with thoracotomy and nine patients were treated with pig-tail drain. Hospital stay were 14.5 days in thoracotomy group and 5.6 days in pig-tail group respectively, Conclusion: Compared to the conventional thoracotomy grouP, the patients with paragonimus empyema who received pig-tail catheters had a significantly-decreased period of drain in situ, were clinically improved earlier, and were discharged earlier.

조직확장기 사용의 임상적 고찰

한흥수,김우경,김수신,백세민 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.1

Recently, soft tissue expansion technique using tissue expanders has become a popular method for reconstruction of soft tissue defect because it provides high quality tissue with similar color, texture and hair bearing characteristics without significant donor site problems. During the period September, 1983 to December, 1988, we used tissue expanders to treat 36 patients with soft tissue defect, 3 scalp, 10 face, 6 neck, 4 trunk, 10 upper extremity, 3 lower extremity and evaluated the operative techniques, results and complications as follows. 1. We achieved favorable results in 31 cases(86.1%), especially in scalp, face and upper extremity, but poor results in lower extremity, especially below knee in location. 2. We experienced major complications in 2 cases(5.6%) such as implant exposure and minor complications in 7 cases(19.4%) such as hematoma, partial necrosis, infection, underlying bony depression etc. 3. Capsular excision is not desirable, but capsular release may permitted to acquire maximal length of the advancing flap. 4. In case of microtia, expanded tissue which was obtained from expanders is defficient for elevation of framework without skin graft. 5. Accurate and meticulous preoperative evaluation is the most important factor in achieving good and results.

중학교 영어학습자의 듣기능력 신장 방안 연구 : 받아쓰기 훈련을 중심으로

한종임,최세라 이화여자대학교 교과교육연구소 1998 교과교육학연구 Vol.2 No.1

본 연구의 목적은 우리 나라 중학생들의 영어 듣기 능력을 향상시킬 수 있는 교수·학습 방법의 일환으로 듣기 지도를 위한 받아쓰기 활용 방안을 모색하는 데 있다. 받아쓰기가 영어 듣기 능력 신장에 미치는 학습 효과를 실증적으로 검증한 결과, 첫째, 받아쓰기 연습은 듣기 능력을 향상시킬 수 있으며, 둘째, 듣기 능력이 떨어지는 하위집단 학습자에게는 부분 받아쓰기가 더 효과적이고 듣기 능력이 비교적 좋은 상위집단 학습자들에게는 문장 전체의 이해를 요구하는 전체 받아쓰기가 더 효과적이라는 것이 입증되었다. 이리한 연구 결과가 영어교육 현장에 주는 시사점은 다음과 같다. 첫째, 영어교사들은 받아쓰기를 주로 평가로만 활용해 오던 종래의 방식에서 탈피하여 영어학습 초기 단계부터 듣기능력을 향상시킬 수 있는 방법으로 활용할 수 있으며, 둘째, 듣기와 연계된 받아쓰기의 효과를 극대화하기 위해서는 영어 학습초기 단계에서는 부분 받아쓰기의 비율을 전체 받아쓰기보다 더 많게 하고, 학생들의 듣기능력이 높아짐에 따라 점차 전체 받아쓰기에 역점을 두는 것이 바람직할 것으로 사료된다. The goal of Korean English education lies in the development of Korean EFL learners' communicative competence. Listening has been regarded as the most important and essential component in developing communicative competence since listening comprehension was proved to be an active skill. However, most English teachers do not know how to teach listening effectively in their class and students say that listening is the most difficult part among the four language skills. Therefore, research on improving listening ability is most needed in order to develop Korean EFL learners'communicative competence. The purpose of this study is to investigate the effect of dictation on the development of Korean middle school students' listening comprehension. The subjects of this study were first-year middle school sdents and they were divided into two groups: two experimental groups and a control group. The experimental groups were further divided into two groups: a spot dictation group and a full dictation group. The two experimental groups were given a dictation task in the consolidation stage of every En81ish class, while the control group was given the traditional consolidation stage without any dictation task. The main results of the study are as follows. First, the experimental groups showed significant improvement in listening comprehension, but the control group did not. Second, there was no significant difference between the spot dictation group and the full dictation group with respect to the improvement of listening comprehension. This indicates that the type of dictation is not a significant factor in improving listening skill. Third, the full dictation was proved to more effective to the high listening proficiency level learners, whereas the spot dictation was more effecsve to the low listening proficiency level learners. These results suggest that dictation can be used as one of the effective methods for improving Korean EFL learners' listening comprehension ability and the types of dictation should be determined according to learners' listening proficiency levels: the spot dictation is recomuended for the low level learners and the full dictation is recommended for the high level learners.

치과 기구 세척 방법들의 효과에 대한 비교 연구

한세진,이재훈,김경욱 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.3

The decontamination of instrument used in extraction or oral surgery before sterilization is the most basic first step. This procedure should be performed to remove gross contamination by blood, saliva dental materials that harbor microorganisms and impair the sterilization. The decontamination of instrument is used by mechanical or chemical methods. The methods used mainly are ultrasonic cleaner, presoaking agent, auto-wash cleaner and manual cleaning. These methods is used by one or combination and have the advantage and disadvantage. In this study, when the decontamination of dental instrument was used by one or combination, the effectiveness of the each method was compared and the advantage and disadvantage of the methods used were evaluated. To do this, after the basic extraction instrument set(dental mirror, suction tip, cotton pliers, hemostat forcep, surgical curette, extraction forcep, extraction elevator) were contaminated by using human fresh blood under same condition, the contaminated instrument set were decontaminated by using 8 experimental decontamination methods. After decontamination, the presence of blood was determined by using qualitative colorimetric blood-indicating strips. We assigned to each result a numerical "blood score", which ranged from 0 to 5, with 5 indicating the greatest concentration of blood. We then completed our statistical analysis with a non-parametric alternative to the one-way ANOVA for use with comparisons of ordinal data. When we analysed all experimental groups by the one-way ANOVA, we found a statistically significant difference(P<0.05) among the groups. The methods used for Group 8(ultrasonic cleaner with presoaking agent) was the most effective in removing blood from instruments. The methods used for Group 3(only presoaking agent) were the least effective in removing blood from contaminated instruments. According to the above results, we could know that the blood of instruments remained, even after the contaminated instruments were precleaned and that the effectiveness of decontamination as methods used was different.

반도체 전공정 제어용 온도제어기 설계 및 구현

한광록,문세호 호서대학교반도체제조장비국산화 연구센터 2000 반도체 장비기술 논문집 Vol.2000 No.-

반도체 양산공정에 적용되는 장비에 있어서 선공정용 장비의 정밀한 온도의 제어는 반도체의 품질과 전체 반도체 제조 공정의 품질을 결정하는 주된 용인으로 작용되므로, 전공정 양산 장비에 대응할 수 있고, 특히 OXIDATION, ANNEAL 및 DEFFUSION 공정에 적용할수 있도록 예측기능을 갖는 온도제어 모듈을 설계 및 구현한다.

Crystal Structure of a Methanol Sorption Complex of Dehydrated Partially Cobalt(Ⅱ)-Exchanged Zeoite A

韓榮旭,張世福,金洋 부산교육대학교 과학교육연구소 1993 科學敎育硏究 Vol.18 No.-

부분적으로 Co^2+ 이온으로 치환한 제올라이트 A를 탈수한 후 메탄올을 흡착한 결정구조(a=12.169(1) A)를 입방공간군 Pm3m를 사용하여 단결정 X-선 회절법으로 해석하고 정립화하였다. 이 결정은 360˚C에서 2±10^+Torr 하에서 2일간 진공 탈수한 후 22(1)˚C에서 약 104Torr의 메탄올 증기로 약 1시간동안 흡착시켰다. Full-matrix 최소자승법 정밀화 계산에서 1>3α(1)인 147개의 독립 반사를 사용하여 최종 오차 인자를 R1=0.061, R2=0.062까지 정밀화시켰다. 단위세포당 4개의 Co^2+ 이온과 1.5개의 Na^+ 이온은 6-링 산소와 결합하고 있었다. 4개의 Co^2+ 이온은 0(3)의 (111) 평면에서 큰 동공 쪽으로 약 0.44 (18)A 들어가 위치하고 1.5개의 Na^+ 이온은 0(3) (111)평면에서 소다라이트 동공 깊숙히 약 0.55A 들어간 자리에 이치하고 있다. 단위세포당 약 6.5개의 메탄올 분자가 흡착되었다. 단위세포당 약 6.5개의 메탄올 분자는 큰 동공 내에 위치하였고 4개의 Co^2+ 이온과 2.5개의 Na^+ 이온과 결합하고 있다.. 4개의 산소는 6-링에 위치한 Co^2+ 이온과 결합하고 나머지 2개의 산소는 6-링에 위치한 Na^+ 이온과 결합하고 있다. The crystal structure of a methanol sorption complex of dehydrated partially Co(Ⅱ)-exchanged zeolite A, Co_4Na_4-A 6.5CH_3OH(a=12.169(1) A˚), has been determined by singlecrustal x-ray diffraction techniques in the cubic space group Pm3m at 21(1)℃. Co_4Na_4-A was dehydrated at 360℃ and 2×10^-6 Torr for 2 days, followed by exposure to about 105 Torr of methanol vapor at 22(1)℃ for 1 hr. The structure was refined to fina error indices, R_1=0.061 and R_3=0.060 with 147 reflections, for which Ⅰ > 3σ(Ⅰ). In this structure, four Co^2+ ions and 1.5 Na^+ ions per unit cell lie at 6-ring positions:the Na^+ ions are recessed 0.444(18)A˚ into the sodalite unit and the Co(Ⅱ) ions extend ca. 0.55A˚ into the large cavity. 2.5 Na^+ ions lie in an 8-oxygen ring plane. The 6.5 methanol molecules are sorbed per unit cell. The 6.5 methanol oxygens, all in the large cavity, associate with the 4 Co^2+ ions and 2.5 Na^+ ions in two ways:four oxygens coodinate to 6-ring Co^2+ ions, and two coordinate to 8-ring.

백화사설초 메탄올 추출물에 의한 HL-60 細胞 枯死過程에서의 cell cycle 關聯因子의 活性變化 硏究

한세희,이종범,문구,문석재,원진희,박래길,이종덕 대한한방종양학회 2000 대한한방종양학회지 Vol.6 No.1

Objecives: Hedyotis diffusa is used to treat cancer in traditional Korea Medicine. So this study was carried out to examine the expression of cell cycle related genes in HL-60 cells undergoing apoptosis by the methanol extract of Hedyotis diffusa. Methods: 1. HL-60 cells were treated with various concentrations (from 200 to 50㎍/ml)of metnanol extract and H20 extract (200 ㎍/ml) of hedyotis diffusa. After 48 h later, the cells were tested for viability by MTT assay. 2. The HL-60 cells were treated with 200 ㎍/ml of methanol extract for the indicated periods. The whole cell lysates were prepared and analyzed by westem blotting using anti-p53 antibody. 3. The nuclear extract were prepared and analyed by western blotting using anti-p21 antibody, anti-p27 antibody, anti-cyclen A antibody, anti-cylin E antibody and anti-CDK2 antinbody. Results: 1. The methanol extract of Hedyotis diffusa induced the death of HL-60 cells in a dose dependent manner. 2. The methanol extract of Hedyotis diffusa makedly decreased the level of p21/Cipl and cyclin A in a time dependent manner. 3. The methanol extract of Hedyotis diffusa markedly increased tje ;eve; pf p27/Kip and cyclin E in a time dependent mammer. 4.The methanol extract of Hedyotis diffusa markedly did not affect the level of CDK2. Conclusions: These results provide evidence that expression of cell cycle related genes in HL-6- cells undergoing apoptosis by the methanol extract of Hedyotis diffusa mainly results from decreased level of p21/cipl and increased level of p27/Kipl of the cell cycle related genes.