R.C.造에서 超音波速度에 미치는 鐵1筋의 影響 : 길이방향鐵筋을 중심으로 On the longitudinal Steel bar

윤석천,정수영,연길환 忠南大學校 産業技術硏究所 1988 산업기술연구논문집 Vol.3 No.2

Ultrasonic testing of a reinforced concrete member by means of the ultrasonic testing apparatus is affected by the steel bar embedded in concrete. A test location avoid the zone of steel effect when selecting test location in reinforced concrete member. But if it is impossible, it is necessary to make a correction to the measured value to provide an estimate of the velocity of the pulse in the plain concrete. The purpose of this study is to analyze the effect of steel bar on ultrasonic pulse velocity and the evaluate optimum correction formular by means of comparison between pulse velocity in concrete and effective pulse velocity according to steel bar diameters. Concrete mixes having water cement ratio of 0.4 and 0.6 by weight and slump values of 18㎝ in fresh concrete were used to make 20×30×60㎝ cubes for pulse velocity in concrete and effective pulse velocity. The diameters of the plain bars were 6, 9, 12, 19, 25, 32, 38 and 50㎜.

근전도 신호의 패턴인식을 통한 의수의 컴퓨터 제어

柳祥桓,洪錫敎,高永吉 亞洲大學校 1987 論文集 Vol.10 No.-

This paper deals with the decision of 7 primitive motions of the arm by EMG pattern recognition using IMB PC. The EMG signals are detected from silver/silver Chloride surface electrodes, and IBM PC calculates the likelyhood probability and the decision function on the feature space of integral absolute value. Multiclass decision rule and learning algorithm are introduced for high decision rate. All procedures are programmed in assembly language for the real time implementation and the co-processor 8087(numeric data processor) is used for the exponential function and the probability calculation. On our experimental results from the experted simulator, the decision rate of more than 90 percent can be obtained.

로케트 工學에 관한 硏究 : 第1報 : 亞音速 亂流流動에서 飛行翼模型의 剝離現象 Ⅰst Report : Separation of Airfoils in Subsonic Turbulent Flow

朴煥奎,金鍾一,金鎭興,李茂錫,朴吉文,鄭洛奎,李行男,李東起 조선대학교 동력자원연구소 1984 動力資源硏究所誌 Vol.6 No.2

Separation, pressure and velocity distributions were studied fully developed two dimensinonal, incompressible flow over a flat airfoil in subsonic wind tunnel. Velocity and turbulence were measured with a two channel constant temperature hot wire anemometer and pressure with a pitot tube and pressure tranducer system. The experimental results were obtained as follow: (1) Turbulent intensity of shear layer just outside the separation point is considered to affect the size of separation bubble. (2) Static pressure coefficient is separated into three regions according to its value change. (3) Separation point is varied with the change of attack angle. (4) Velocity distributions and boundary layers normal to airfoil surface are changed as variation of attack angle of airfoil.

大邱市 北郊의 都市化에 關한 硏究 : a case of chilgok myeon, Chilgok county

李奐基,楊辰錫 慶北大學校 師範大學 地理敎育科 1979 地理敎育 Vol.6 No.-

This study was concerned about characteristices of Urbanization in regions around metropolitan. It has the purpose to make clear the structure of Urbanization in the northern outskirt of Daegu, Chilgok myeon, chilgok country, after searching the procedure of urbanization(1966-1976) and the actual Condition of urbanization. 1) In examining closely the procedure of urbanization, the comparative method was used and tried to understand the urbanization phenomenon as a regional phenomenon, As this study was geographic research in Urbanization. 2) Materials were dependent on existing statisties and those that I myself collected in the field by field-work. 3) In order to analyze actual conditions and procedure of urbanization, the following two indexs were used: (1) Changes of population-changes of total population, increase and decrease of population of each Dong(village), and change of industrial population. (2) Increase of Urban fuctional element-increase of houses, of shops, of factories of traffics and a jump of land price. The result of the analysis by the above method and indexes could be summarized as follows: 1) For nine years from 1966 to 1975, the population went on an an increase of 51.5%. In other words 7,124 persons increased from 13,828 persons in 1966 to 20,952 persons in 1975. such a rapid population increase was affected by the suburban explosin of Daegu. The density of population increased 152.4 persons/㎢ from 295.7 persons/㎢ in 1966 to 448.1 persons/㎢ in 1975. As for industrial population, the rate of the rural industrial population(1966-1971) was 13.7% down from 84.4% to 70.7%. On the other hand, the rate of urban industrial population was 5.3% up from 19.3% to 24.6%. In changes of population, the differences of each village being great, it was possible to divide the whole area into the growing, the nongrowing and the declining region. 2) Of urbanizing functional element increase; House increase rate from 1966 to 1976 was 39.5% but the house shortage rate increased 24% for the same period. And so the great house shortage took place. As for shop increase, all shops(84 shops) are retail trades, related with Daegu city. With factories and houses increasing, in this area we can find out the seperated urbanization phenomenon. As of 1976 August, the total of 79 factories were built in chilgok myeon dependent on the zoning program of Daegu city urban design. These factories are closely related with the technical development of Daegu. Traffics a day were 3,230 cars and so increased 15.6% a year. As the roads in this area were the most convenient, when compared with those in other area from Daegu. The urbanization on this area is growing rapider than in other area. During 1966-1976 the land price jumped 400-8300%. In other words this means the growing rate of urbanization. The urbanization of Chilgok myeon will continue in the future and social problems caused by the urbanization should be taken consideration in the policy.

간질에 관한 사회정신의학적 연구

오석환,유계준 大韓神經精神醫學會 1971 신경정신의학 Vol.10 No.1

Feeling the keen necessity while the authors were studying on the family attitude toward epilepsy the study of the social attitude toward epilepsy was conducted. A total sample of 1,400 adults were drawn from the available population who reside in the five major areas and its outskirts. The sample contained proper proportion by sex, by age, by occupation and by educational level. A series of questions framed to detect a concept of the present day social attitude toward and knowledge of epilepsy were asked by the method of questionnaire. From the obtained results the authors have observed that knowledge of epilepsy was widespread and negative, guarding and rejecting feelings were fairly pronounced. 1) Knowledge of epilepsy was found in 94.28% of the samplings, through either having seen a seizure(53.57%) or having heard about it(40.71%). 2) When they were asked about their feeling toward epilepsy, bad feeling was expressed by 75%, unpleasant feeling by 69.21%, having epileptics around their house and 62.21% wanted to have epileptics isolated. 3) When asked if they would let their children play with epileptics, 58.57% answered No and only 17.14% said Yes. 4) Employment was objected to by 28.50% and advocated with qualification by 48.93%. 5) Marriage was approved only by 11.79% and objected to by 56.14%. But when asked if it were their own children case, 74.14% objected and only 3.29% approved. 6) Sympathetic feeling toward the family of epileptics was expressed by 72.29% and benevolent feeling by 15.64%. 7) Among those diseases including epilepsy which are generally feared by public, such as cancer, schizophrenia, poliomyelitis, syphilis, encephalitis and tuberculosis, epilepsy was feared in order next to cancer and schizophrenia. It is the author's feeling gained from the results that the public enlightenment and better understanding of epilepsy are urgently required in this society.

3-Tier System을 적용한 인터넷 쇼핑몰 구축방안

문석환,이성화 제주한라대학 2000 論文集 Vol.24 No.-

This study suggests the internet shopping mall based on 3-tier system which was the weak point of the overload of the client & server system and constructs the middle ware system applied to the platform of the electronic commerce. The main kernel theory of this suggestion was applied by gearing with WEB and RDBMS, appling active X server component, 3-tier system using MTS, and statistics agent. After that, the life period of application was extened, and component was distinguished by object-oriented concept, and logical capsulizing data structure was possessed.

소아의 상완골 원위부 과간 골절

이우석,정환용,김우식,김용찬,전택수,김남현,김규태 대한골절학회 2004 대한골절학회지 Vol.17 No.4

상완골 원위부 과간 골절은 소아에서는 매우 드물게 발생되는 골절로 대부분 주관절의 굴곡상태로 주관절 후방부에 직접적인 충격에 의해 발생하는 것으로 보고되고 있다. 전위가 없거나 경미한 경우 도수적 정복술 혹은 도수적 정복술 후 경피적 핀고정술을 시행하며, 전위가 심한 골절이거나 도수적 정복술이 불가능한 경우 관혈적 정복술 후 핀고정술을 시행하는 것으로 알려져 있다. 저자들은 전위된 상완골 원위부 과간 골절 환아 2예에서 각각 도수적 정복술과 관혈적 정복술 후 K 강선 고정술을 시행하여 만족한 결과를 얻었기에 보고하는 바이다. Intercondylar fractures of the distal humerus are very rare in children. The pattern of the fracture would suggest that the mechanism of injury involves a fall directly on the flexed elbow. Most agree that the undisplaced fracture can be managed conservatively. With increasing displacement and comminution, the opinions tend to differ. We suggest that closed reduction with percutaneous K wire pinning and open reduction with percutaneous K wire pinning offer a satisfactory methods by which to treat displaced intercondylar fracture in children.

精神科 入院의 季節的 變動

吳碩煥,朴助烈,裵大均,金錫柱,韓東大,張貞富,柳志珍 大韓神經精神醫學會 1964 신경정신의학 Vol.3 No.2

(1) Authors studied seasonal fluctuation of psychiatric admission preliminarily, based on data of admission to Pusan area for a 4 year period of 1960-1963, and obtained following impressions. (2) The rate of admission in Pusan area and its seasonal fluctuation appear quite similar to those reported by investigators for European, American and Japanese cities. Thus the admission increases in spring and reaches the maximum in May and then gradually decreases toward the end of year. (3) The data obtained by statistical analysis of the seasonal fluctuation in Pusan area were compared with those of foreign ones in order to observe how to be related to the latitude of the locality. It is the general tendency that the lower latitude showed increase of admission in earlier months of the year than the higher latitude did. (4) It is a impression that the admission of affective psychoses are more sensitive to the climatic factors than the schizophrenics. (5) It is conjured by the authors that the socio-cultural and economic factors should be considered to give an account of the seasonal fluctuation of psychiatric admission.

精神薄弱의 Kraepelin Test 成績

吳碩煥 大韓神經精神醫學會 1962 신경정신의학 Vol.1 No.2

The Kraepelin test(consccutive adding) has been well known as the kind of performance test and used to investigate the activity of the human mental function since many years age. It was also previously noticed by many authors that there could be seen the intimate relation between the performance and the score of intelligence test or the stage of mental development. Bourdon's method has been used for the one who has even no ability of adding ; by the way of erasing the each number with X or O. The Kraepelin test(consecutive adding) and Bourdon's test were given to 51 mental defectives as the experimental group and 60 children of normal intelligence as the control group. The result of test were compared. 1) The volume of work are markedly greater in the control group than the experimental group in every case. 2) The initial tension of the curve of performance are marked in almost all cases of the control group. It was almosst not seen in the experimental group. 3) The effect of rest was prominent in the control group but not in the experimental group. 4) The number of mistakes were generally only few in control group but significantly many in the experimental group. 5) There was not much evidence of excitement in the course of performance of the experimental group and the form of curve appeared like a smooth wave. 6) The types of curve in the most of experimental groups were evaluated as abnormal or questionable and only a few were within normal limit. The types of curve in the control groups were all within normal of subnormal limit. It is true that by Kraepelin test, it is unable to test every part of intelligence and find out the exact intelligent quotient. However, it is the author's feeling that on the diagnosis of mental defectives, Kraepelin test can be helpful to estimate the intelligence roughly, supplementing the psychiatric examination and study of life history. It has also the advantage to give the test to the group of many persons at the same time under the same condition.

한우 치은의 Collagen 함량에 관한 연구

김석환,정태영 대한구강생물학회 1979 International Journal of Oral Biology Vol.3 No.1

This investigation was performed to estimate the proteins, chiefly collagen, obtained from 2 year old bovine gingival tissues. Proteins in samples were extracted by salt or pepsin digestion. Extracted collagens were treated with 0.1% SDS and 0.1% β-mercaptoethanol in 0.01M phosphate buffer, pH 7.0, and fractionated by SDS-agarose gel column chromatography and/or SDS-polyacrylamide gel electrophoresis. The hydroxyproline content of salt-soluble and pepsin-soluble collagen was also determined. The results were as follows : 1. The content of hydroxyproline in gingival tissues was 54㎍/mg dry weight. The content of hydroxyproline in salt-soluble collagen was high than that in pepsin-soluble. 2. From both of salt-soluble and pepsin-soluble collagen, the bands of α_1-, α_2-chain, and the unknown band corresponding to molecular weight 68,000 were separated by SDS-polyacrylamide gel electrophoresis. The another band of β-chain was also separated from the salt-soluble collagen. 3. The recollected fractions under the peaks of SDS-agarose gel column chromatography were separated by SDS-polyacrylamide gel electrophoresis into the bands of α_1-and α_2-chain around the area corresponding to the molecular weight of collagen.