LiDAR 데이터를 이용한 수문지형인자 추출

김동문,김성훈,김의명 남서울대학교 2007 남서울대학교 논문집 Vol.13 No.4

Topographic parameter play an important role in determining the nature of water resources and related hydrological modelling.Recently, the research related in analyzing topographic parameter that which are required in hydrological analysis using GIS techniques is achieved.A watershed analysis tend to use a digital elevation model from LiDAR rater than that of extracted traditional map sheet.DEM quality and resolution affect the accuracy of any extracted hydrologic topographic parameters.Therefore, it is demonstrated that a LiDAR-derived DEM with high accuracy and high resolution offers the capability of improving the quality of watershed boundary extracted from DEMs. KeyWords : LiDAR, DEM, Topographic paramenter, Watershed

방사선사진의 인덱스-순서 분석을 통한 치아경조직의 탈염화 검출

박동현,박영호,김경숙,박정훈,이기자,최삼진,최용석,황의환,박헌국 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2

Purpose : The purpose of this study was to develop the radiographic technique for detecting the demineralization which is known as indication of dental caries. Materials and Methods : This technique was based on the comparing of multiple radiographs which was irradiated by multiple X-ray spectra. For the meaningful comparing, the multiple radiographs were reconstructed to the dosimetrically consistent images using a standard material. The difference of resulting images of same target with multiple spectra represents the difference of response of material as regards the spectra. Results : We have found about 10% of demineralization of dental hard tissues particularly in the proximal region through the analyzing of differences. Conclusion : Most intriguing thing in this investigation was that the method to analyze difference shows us to an anatomic structure of dental hard tissues even if absolute values of optical density were excluded during the procedures.

전형적인 DISIDA scan 소견의 Rotor 증후군 1예

황의태,염동한,권지혜,임종주,최창수,김태현,김학철 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.2

만성의 비용혈성 직접형 고빌리루빈혈증은 Rotor 증후군과 Dubin-Johnson 증후군의 특징적인 소견으로, Rotor 증후군은 드문 양성 유전성 질환이며, Dubin-Johnson 증후군과 감별을 필요로 한다. 본 저자들은 황달을 주소로 내원한 26세 남자 환자에서 고빌리루빈혈증에 대한 검사를 시행하여 담도폐쇄 소견없이 간담도 스캔상 전형적인 Rotor 증후군의 소견 즉, 강한 심장 배후방사능이 지속되면서, 간담도계의 조영은 지연 촬영에서도 관찰되지 않으며 신장으로의 배설이 계속 관찰되는 특징적인 소견과 정상 간조직 검사 결과로 Rotor 증후군으로 진단한 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Chronic nonhemolytic conjugated hyperbilirubinemia characterizes both Rotor and Dubin-Johnson syndromes. Rotor syndrome is a rare, benign familial disorder and needs to be differentiated from Dubin-Johnson syndrome. Cholescintigraphy is a simple and informative procedure for the diagnosis, which can differentiate Rotor syndrome from Dubin-Johnson syndrome. A 26-year-old man was admitted due to asymptomatic persistent jaundice. Physical examination revealed icteric sclera without hepatosplenomegaly. Laboratory findings showed increased serum bilirubin with direct bilirubinemia. Markedly decreased hepatic uptake and poor visualization of the gallbladder and biliary tract were shown in ^(99m)Tc-DISIDA scan. Histology of the liver showed no diagnostic abnormality without pigmentation. But, we report a case of Rotor syndrome that showed characteristic cholescintigraphic findings with normal urinary total coproporphyrin excretion.

천연가스 연료공급시스템의 과도 유동에 관한 수치연구

박의철,차동진 한밭대학교 생산기반기술연구소 2001 생산기반기술연구소 논문집 Vol.1 No.1

A numerical study has been conducted to characterize the transient pressure and flow in a natural gas supply system of utility gas turbines. The solution domain encompasses the supply gas pressure regulator to the combustor of the gas turbines. Some results produced for the purpose of verification in the study agree quite well with the experimental ones. Then, the transient gas flow in the system is characterized when the opening ratios of the control valves in the system are varied. It is found that the total gas flow of the system decreases noticeably at the moment its combustion mode changes, which would be the reason that its combustion instability momentarily occurs. Results reported in this study may be useful to understand the unsteady behavior of the natural gas supply system.

Solid Modeling 기법을 응용한 복합곡면 가공에 있어서 공구간섭 제거

장동규,조시완,양균의 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.2

Compound surface modeling is widely used for die cavities and punches. A compound surface is defined in 3-D space by specifying the topological relationship of several analytic surface elements and a sculptured surface. A constructive solid geometry scheme is employed to model the analytic compound surface. the desired compound surface can be accomplished by specifying topological relationships in terms of boolean relations between primitives and the sculptured surfaces. Additionally, a method is presented for checking and avoiding the tool interference occurred in machining the compound surface. Using this method the interference of concave, convex, and side region can be checked easily and avoided rapidly.

고밀도 플라즈마에 의해 식각된 SrBi_2Ta_2O_9 박막의 표면 반응 연구

김동표,김창일,장의구 중앙대학교 기술과학연구소 2000 기술과학연구소 논문집 Vol.30 No.-

본 연구에서 SBT 박막은 Cl_2양을 변화하면서 Cl_2/Ar 가스 플라즈마를 이용하여 식각하였다. 최대 식각 속도는 Cl_2(20%)/Ar(80%) 가스혼합비에서 883A˚/min 이었다. Cl_2 가스양이 증가함에 따라서 SBT 박막의 식각 속도는 감소하였다. 이는 Ar 이온의 물리적 스퍼터링에 의한 영향이 화확 반응에 의한 식각보다 우세하게 작용함을 의미한다. 식각 메커니즘을 규명하기 위하여 optical emission spectroscopy (OES), x-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS)와 atomic force microscopy (AFM) 분석을 하였다. AFM 분석결과에서 Ar이나 Cl12 플라즈마를 이용하여 식각된 시료의 표면 거칠기 rms 값이 식각전의 시료나 Cl_2/Ar 플라즈마로 식각된 시료보다 크다. 이는 식각된 시료에서의 Bi 양의 감소나 비휘발성 식각 잔류물에 의한 영향이다. XPS와 SIMS 분석을 통하여 검증하였다. SBT thin films were etched at different content of Cl_2 in Cl_2/Ar. The maximum etch rate of SBT was 883A˚/min in Cl_2(20%)/Ar(80%). As Cl_2 gas increased in Cl_2/Ar gas plasma, the etch rate decreased. The result indicates that physical sputtering of Ar ion is dominant to chemical reaction in etching SBT thin films. To evaluate the etching mechanism of SBT thin films, optical emission spectroscopy (OES), x-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS) and atomic force microscopy (AFM) were carried out. From the result of AFM, the rms values of etched samples in Ar only or Cl_2 only plasma were higher than that of as-deposited, Cl_2/Ar. This can be illustrated by a decrease of Bi content or nonvolatile etching products(Sr-Cl and Ta-Cl), which are revealed by XPS and SIMS.

In situ hybridization기법을 이용한 shiga toxin-producing Escherichia coli의 검출 및 stx2의 염기서열분석

김의종,이동영,최혜심,주세익,이정희,김상현,반성환 대한임상미샐물학회 2000 Annals of clinical microbiology Vol.3 No.2

退溪哲學의 理에 관한 考察

黃義東 청주대학교 인문과학연구소 1987 人文科學論集 Vol.6 No.-

Yi-Hwang philosophy represents Korean philosophy in company with Yul-Gok(栗谷)philosophy. Yi-Hwang illustrates the form of Existence-structure of all things from I and Ki(氣)as well as the traditional Confucianists. But he attaches great importance to the I. Therefore, the writer intends to examine the I in Yi-Hwang philosophy multilaterally. 1. Yi-Hwang states the relative I in the structure of the profound harmony of I and Ki, in spite of it, he emphasizes the absolute I that can exist without the Ki. 2. Yi-Hwang explains the I as Being-principle and Ought-principle, but he rather puts a stress on the Ought-principle than Being-principle. 3. Yi-Hwang makes plain his I-Ki doctrine in Cosmology and the theory of Human Nature, but he concentrates upon the I in the theory of Human Nature. 4. Yi-Hwang claims the action of the I, in that stand point, he differs from Chutzu(朱子)and Yul-Gok(栗谷). It is the distinctive feature of Yi-Hwang philosophy. But it has some problems logically. Eventually the above things originates from the ethical viewpoint of Yi-Hwang philosophy. Besides, they have the meaning of supplement of Chu-tzu's in sufficiency.

평행봉 무릎 펴고 2회전 뒤공중돌아 내리기 동작의 주요 단계별 운동학적 요인 분석

이동우,강병의,김재필 한국운동역학회 1998 한국운동역학회지 Vol.8 No.2

The purpose of this study was to investigate the kinematic factors during the dismount motion in parallel bars. Six elite gymnasts were participated in this study and were asked to perform double backward somersault in parallel bars. Two video cameras were employed to capture the motions of the subjects. Kwon3D software was used to process and analyze the data. The results obtained from the study were as follows; The average flight time was 0.92sec which reflects the improvement of the technique compared to the previous studies. It was assumed that the longer the flight time the faster the vertical velocity. The vertical position of COM was 209.5cm at the hand take-off and 266cm at the peak. The subjects showed a large vertical and horizontal displacement during down swing phase, which have an influence on the batting phase of swing. The anteroposterior velocity of foot segment had the positive impact on the rotation of the whole body. The magnitude of hyper-extension of the hip joint and shoulder joint seemed to be the critical factors influencing the batting phase of the whole body swing.

새마을運動과 地域精神의 發展

黃義東 청주대학교 새마을연구소 1988 새마을硏究論文集 Vol.5 No.-

The regional ethos of Chungbuk province is a specific character of inhabitants from Chungbuk province and it is the product of history and tradition. Now, we can find double-faces, affirmative and negative ethos, about it. To be called that the regional ethos of inhabitants of Chungbuk province, the spirit of classical scholars who has esteemed courtesy and scholarship, abundant humanity, harmonious character, they are proud ethoses of inhabitants of Chungbuk province. But, to be called that the other regional ethos of them, negative and passive character, opportunistic inclination, attitude respecting his reputation, they are ethoses that it is necessary to break by them. The findings as the result of the investigation by questionnaire reveal to change the regional ethos of inhabitants of Chungbuk province with relation to the Saemaul movement as follows. (1) The inhabitants of Chungbuk province believe that they have mild and simple-minded character as his ethoses and passive character, the former is his merits while the other is his demerits. (2) The inhabitants in the 40.2% of Chungbuk province give an affirmative anwer in the matter of the development on a full scale in Chungbuk district. It means the powerful change in character of the inhabitants. However, it is worthy of attention that the inhabitants in the 59.8% agree with reservations or come out against about it. (3) The inhabitants of Chungbuk province (87.3%) believe that the human nature of them is good-hearted as compared to other provinces' people, and they take pride in it. (4) The inhabitants of Chungbuk province(70.2%) estimate that Saemaul movement contributed affirmatively to change in character of them. (5) Above all, they appreciate that Saemaul movement exert a far-reaching influence on the change of conciousness, which regard his profit as important than his reputation. It may be given as a conclusion that Saemaul movement has exerted a great influence, affirmatively and negatively, on the change of ethos of inhabitants of Chungbuk province. Now, they regard his profit as important than his reputation and his conservative ethos is beginning to be revised. On the other hands, the findings as the result of the investigation reveal to change the regional ethos of inhabitants of Chungbuk province that the merits of them, simple human nature and the spirit of classical scholars who has esteemed courtesy and scholarship is beginning to wear of sensibly. In consequence, we have to look for the best way which harmonize tradition with modern, conservative with progressive, and reputation with profit, ethic with economics.