Ⅲ급 부정교합 아동의 교정 치료시 저작근의 근전도 POWER SPECTRUM 변화에 관한 연구

김형두,김진태,김종철 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.1

The purpose of this study is to evaluate the changes in the electromyographic power spectrum of the masticatory muscles before and after treatment of the class Ⅲ malocclusion children. Twenty one children with class Ⅲ malocclusion, seventeen children with mormal occlasion, and thirteen children who received orthodontic treatment were included in this study. Class Ⅲ malocclusion children were treated with Frankel appliances. The myoeletric signals from the masseter and anterior temporal muscles were recorded for thirty seconds in 80% level of maximum voluntary contraction using computer-aided EMG system. The power spectral analyses were done with computer and the following results were obtained : 1. In all subjects the median frequency of the electromyographic power spectrum of both muscles showed shift to lower frequency range as isometric contraction was sustained(P<0.001). 2. The slope of median frequency in normal occlusion children was a little higher than that in class Ⅲ malocclusion children, but did not show any significant difference statistically. 3. After treatment the slope of median frequency increased slightly, but did not show any significant difference statistically. 4. After treatment the median frequency of the 1st block dropped significantly in both muscles, and the temporal muscle showed greater drop than the masseter muscle(masseter muscle:P<0.05, temporal muscle:P<0.001). 5. After treatment the median frequency of the 30th block dropped significantly in both muscles, and the temporal muscle showed greater drop than the masseter muscle(masseter muscle:P<0.05, temporal muscle:P<0.001) 6. After treatment the mean value of the median frequencies for thirty seconds dropped significantly in both muscles, and the temporal muscle showed greater drop than the masseter muscle(masseter muscle:P<0.01, temporal muscle :P<0.001).

진행성 위암에 동반된 위 칸디다증 1예

이두영,김성호,선제형,박진석,손존광,선홍주,이승,박찬국 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2

Gastric candidiasis is an uncommon disorder. It is an opportunistic pathogen in immune compromised individuals, alcoholics, persons treated with broad-spectrum antibiotics, immunosuppressive and chemotherapeutic agents. Besides, the use of drugs that reduce the gastric acid production may be a cause of gastric candidiasis. We experienced a case of gastric candidiasis following advanced gastric adenocarcinoma. A 85-year-old woman was admitted to our hospital because of epigastric soreness. Endoscopic findings revealed a large ulcero-infiltrating mass with yellow exudate at cardia of the stomach, which suggested an advanced gastric cancer. Endoscopic biopsy revealed spores and pseudohyphae infiltrating through the ulcerated stomach wall, diffuse infiltration of tumor cells and abortive tumor glands. After treatment with fluconazole 100 mg daily for 21 days, no evidence of the gastric candidiasis was seen on endoscopic biopsy and pathologic findings. The case is herein reported of gastric candidiasis following advanced gastric adenocarcinoma along with a review of corresponding literature.

琴湖江 流域의 水質 土壤 및 무우의 重金屬含量

金斗熙,宋亨達 慶北大學校 産業開發硏究所 1984 硏究報告 Vol.12 No.-

This study was conducted to investigate the content of heavy metals in water, in basin soils and radish around of the Geumho river. In order to obtain the correlations among the polluted river water, the basin soil and the agricultural products in each others, Zn, Cu, Cd and Pb were primarily measured from August 4 to November 27, 1983. The content of heavy metals in tributary streams has been found more (Zn, 41∼942ppb ; Cu, 32∼421 ; Cd, 10∼43 ; Pb, 2∼24) than main stream (Zn, 21∼248ppb ; Cu, 14∼104 ; Cd, 5∼16 : Pb, 2∼9). In soils of river basin, we estimate that the contents of heavy metals have much difference according to areas, especially the downstreams of Sin-stream, Dalseo-stream and Kongdan-stream were very high (Zn, 246.31ppm, 321.32 ; Cu, 71.84, 89.34 ; Cd, 3.23, 5.07 ; Pb, 80.99, 96.47) due to the industrial sewage. Between the radishes and the soils, Zn(r=0.5787) and Cu(r=0.6007) was correlated, but that of Cd and Pb was not. Between the soils and water, all of the heavy metals (Zn, r=0.8714 ; Cu, r=0.9588 ; Cd, r=0.9812 ; Pb, r=0.8893) were highly correlated.

建築設備工事의 施工性 向上에 관한 硏究 : 설비전담부서의 설치 필요성을 중심으로

조형근,구자두 호남대학교 1998 호남대학교 학술논문집 Vol.19 No.2

Recently construction has become large in scale, high, complex, diverse, and professional, and its consumers demand improved quality in living environments, design and construction in building services must improve in precision. However, quite often people who carry out building services works do not prepare design documents, and poor construction with defects occur in construction site many times. To address this matter, I have conducted a questionnaire survey with students in Honam Construction Engineering Education Center and officers and students in Army Engineering School for this study. The survey is about causes of poor construction that are requirement of employing specialist of building services, setup of a service department related with the matter. After the collected guestionaire data divided according to the kinds of major business and qualification educational background work experiences, the requirements of setup of a department exclusively responsible for building services and employment of relative specialists are analyzed. Base on the above results, to suggest basic methodology of constructability improvement of building services works.

탈지작업 근로자의 트리클로로에틸렌 폭로에 관한 조사

박두용,김형아,김창엽,백남원,조정진,김양호,이광묵 가톨릭대학 산업의학 쎈타 산업의학연구소 1989 韓國의 産業醫學 Vol.28 No.4

Trichloroethylene(TCE) is a widely used organic solvent, especially in degreasing process of metal manufacturing, however few data concerning its exposure and poisoning were obt-ainable. This survey was performed for more information of TCE exposure in this country. Urine sanmples were collected from 144 TCE handling workers and 46 non-TCE-exposed workers. TCE concentrations of four workshops in working environment were analyzed. The results were as follows; 1. TCE exposed workers were 48 male and 96 female employees. Average total duration of employment of these workers was 39.0 months, average duration of works per day was 10.7 hours, and average duation of TCE handling was 469.7 minutes. 2. The average concentration of urine total trichloro-compounds was 156.32㎎/ g crea-tinine, and that of trichloroacetic acid was 69.2㎎/g creatinine. Of those workers, 78 workers had the concentrations of urine trichloroacetic acid over 75㎎/g, which is the biological exposure index (BEI) of urine trichloroaxetic acid in Korea. Duration of work per day and duration of TCE- related work were significantly longer in the group of workers whose urine trichloroacetic acid concentration was over the criteria level of BEI. 3. TCE concentrations of three workshops were over the level of ACGIH TLV(threshold limit value), 50ppm in TWA (time -weighted average). In remaining one workshop, duration of TCE related works was only one hour per day. There was statistically significant correl-ation between the concentration of TCE in working environment and the proportion of workers in a workshop whose urinary trichloroacetic acid concentration was over the criteria level of BEI. 4. Responses to self-administered questionnaire were not meaningful for differentiation of psychoneurologica symptoms due to chronic TCE exposure from othres.

소아 함치성 낭종의 치험례

이두형,안병준,장충현 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.3

Dentigerous cyst originates from the crown of the tooth has been completely formed by accumulation of fluid between the reduced enamel epithelium and the tooth crown. In the incidence age, dentigerous cyst occur with a more even distribution among the age groups but there is noticeable drop in the patients younger than ten. There is greater incidence of cysts in the maxilla than in the mandible, but dentigerous cysts differ in the respect ; there are found more often in the lower jaw. We experienced 4 cases of dentigerous cysts which is rare in first decade and acquired satisfying result by surgical excision.

Taxol 합성에 관한 연구 I :O-(tert-Butyldiphenylsilyl)-cis-5-methyl-4-hepten-6-yn-1-ol의 합성

박두천,주우홍,김형국,신동수 國立昌原大學校 基礎科學硏究所 1994 基礎科學硏究所論文集 Vol.6 No.-

O-(tert-Butyldiphenylsilyl)-cis-5-methyl-4-hepten-6-yn-1-ol, an intermediate in the synthesis of taxol, was efficiently synthesized from 3-methyl-2-penten-4-yn-1-ol by sequential alcohol/bromide interchange [NBS, PPh₃, CH₂Cl₂-30.℃, 82%], displacement with the lithium salt of tert-butylacetate [LDA, THF, -78 to 23℃, 84%], LAH reduction, and silylation [tBuPhSiCl, imidazole, CH₂Cl₂, 45℃, 88%]

축소 플랜트를 이용한 PID 제어기 설계

안두수,임윤식,김민형,이재춘,이한석 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1

In this paper, a simple method is developed for desiging a single loop PID contriller using a computer oriented algebraic approach which is based on general polynomial. Specifically, the proposed PID controller can approximately achieve an arbitrarily specified closed-loop response, which satisfies time domain specifications such as rising time, overshoot and settling time. The design technique is straightforward, and the paramaters of the PID controller are determined by solving a set of linear equations using the least squares method. It does not involve any trial and error proceduer, hence the difficulty of the conventional approach can be avoided.

「海底資源의 國際的共同管理를 爲한 試案」 : 世界連邦政府의 樹立을 前提하며 THE STIMULATION OF THE WORLD CONFEDERATE GOVERNMENT

金斗瀅 釜山水産大學校 1969 論文集 Vol.3 No.-

The time of inconveniences and inequality has passed in which the strong control the weak and the former makes the latter obey the former's order, and irrationality drives out rationality, and Vice expels Virtue. The modern society where the strong and the weak co-exits, rationality control over the irrationality and virture does vice is the common end of all the human-beings and also of the perpetual peace among the nations which aim at enjoying both liberty and equality at the sametime. But our reality is confronted with worthless war, the differences of richness and poverty between South and North worlds, and the problems between eastern and western worlds, and conflict between U.S.A. and U.S.S.R. caused by the difference of Ideology. It means that we could not escape from the Natural aspect insisted by T. Hobbes (1588-1675). Several Countries, especially the power (powers) which are concerned with only intersts is the self-cent-ered clased society which act on the base of theit power, and those countries have to be called a wolf and jackal towards other countries. It is evident that the opposition of the governmental ideology, the problems of economical wealth and poverty and the problems between East and West is the egoistic products of sovereign countries. It is the best idea to establish the world confederate government to limit the act of Sovereign countries for the purpose of expelling the war and hideous poverty, and solving the problems of the East and West from which the continous peace can be had in the world. And another great problem is to solve the increasing population all over the world and to pioneer the marine area as well as the Universe to be supplied with food and energy from them. The sea which accupies three quarters of the earth consists of the deep sea that amounts to ninty two percent of all the sea area. But the sea still remains undiscovered from them. It is guessed that the minerals buried underneath the deepsea are thousand times as much as those underneath the land. Can the powerful countries show another colonial struggle again to occupy the marine area according to their theory of prior occupancy (for the miltaty purpose and the acquisition of interests). According to the first item of the second article decided at the International Marine Talk in Geneva in 1958, the Monopoly right of neighbor sea of each countries has been approved, but the writer would rather agree to the propoition of Malta Island talked atU.N. in 1967, I should like to instst that the law should be settled to make peaceful use of the submarine resources as well as the "Commission of peace use of submarine area" under the international common management. The income gained from it should be used for the under-developed countries and peace and welfare of human-being all over the world. To do it, the deep-sae management has to be regulated by law so that the international common development organization may effectuate. As Lassswell-Einstein, appeal(1955) has once dicturmed "All the humanbeings should keep humanity in their mind and forget other unnecessaries," all the countries all over the world must avoid war, starvation and opposition, and instead establish peace and harmony among the countries at present and in the future, Through the world confederate government which should restrict the egoistic act of the powers, the underdiscovered marine area must be pioneered to solve the problems of increasing population.

법랑라세포종의 면역조직화학적 및 전자현미경적 연구

이두형,조성덕,양문호,장충현,박재훈 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.3

Clinicopathologic analysis of ameloblastoma in 24 cases and their ultrastructural and immunohistochemical studies, especially to cytokeratin expressions according to morphologic classification were performed to clarify the tumor cell differentiation and origin. Reaction with broad spectrum and high molecular weight cytokeratin were generally positive in the stellate cell of the follicular and acanthomatous ameloblastoma, suggesting more squamous differentiation than peripheral basal cell type. Although ultrastructually common origin from oral epithelium was evidenced by presence of tonofilaments and desmosome, variations were prominent among the different histopathologic types of tumor. In granular cell ameloblastoma there were pleomorphic osmiophilic lysosome-like granules.