적층형 압전 세라믹필터의 공진주파수에 관한 연구

韓得永,金漢星 建國大學校 附設 産業技術硏究所 1991 논문집 Vol.16 No.-

본 논문은 압전진동자/얇은 절열판/압전진동자의 순서로 적층한 압전 세라믹필터의 공진주파수에 관한 것으로서, 출력소자의 전극을 n등분한 경우의 등가회로로부터 공진주파수 부근에서의 전기적 입출력, 입력전압과 출력전압 사이의 위상차, 공진주파수, 대역폭 등에 관한 일반적인 식들을 유도하였고, n=1인 경우의 관련실험들을 통한 실험결과들과 계산결과들을 비교하였다. This paper is concerned with the resonant frequency of a ceramic filiter laminated in the order of piezoelectric vibrator/thin insulator/piezoelectric vibrator, and introduces general expressions of electrical inputs and outputs, phase difference between input and ouptut voltages, resonant frequency, and bandwidth, when the electrodes of the output element are divided by n equi-sections, and the filter is driven near the resonant frequency. Results of experiment and calculation when n=1 are compared and discussed.

FULL COLOR DISPLAY를 위한 LED MODULE의 DESIGN 및 온도특성에 관한 연구

한득영,안형근,송유리 건국대학교 산업기술연구원 1997 건국기술연구논문지 Vol.22 No.-

In this paper, design principle for the optimization of the full-color display is suggested to show nearest white light by mixing high radiance R, G, B LEDs with appropriate proportional indices. By counting these three colors to be additive mixing and producing white light color contrasted to negative mixing, each number of LED's is theoretically deduced and designed with several shapes of chips for the full-color displays. Theoretical predictions are compared with the measured data for different type of display designs and best number ratio of LED is studied. Finally the influence of temperature change on optical properties of LED module for Full-Color Display has been tested and compared with experimental results.

압전 세라믹 바이모프의 전기 기계적 특성

한득영 건국대학교 산업기술연구원 1994 건국기술연구논문지 Vol.19 No.-

Expressions for the displacement and the resonant frequency of a bimorph, one end fixed and the other free, have been introduced when sinusoidal imputs of various frequencies were applied to the ceramic plates on a thin metal plate. And maximum displacements at the free end and strains at the position of strain gage attached were measured when various wave forms, voltages, and frequencies were applied to the bimorph whose length is 6.6[cm], width 2.5[cm], and thickness 0.04[cm]. Under the condition of constant frequency and effective length, it was shown that the displacements at the free end and the strains of the gage position were increased as the applied voltage was increased in the range of 30∼90[???]. And it was also found that the resonant frequency of a bimorph was decreased as its effective length was increased, and that the displacements and the strains were maximum at the resonant frequency.

유방선암의 유형에 따른 c-erbB-2, p53, bcl-2, 그리고 c-myc의 발현

강영근,조현득,오미혜,김의한,양승하 순천향의학연구소 2006 Journal of Soonchunhyang Medical Science Vol.12 No.2

Breast carcinoma is a common malignant tumor in female of the korea. Various oncogenes have been found in malignant tumor cells. There were many reports or correlation between the prognosis of patients and c-erbB-2, p53, bcl-2, and c-myc, but is controversial. We performed immunohistochemical stain for above antigenic protein for 80 cases of breast carcinoma and evaluated expression rate of each antigens, and we compared their correlation with prognosis of patients. The results were as follow; 1) The expression rates in breast carcinoma was c-erbB-2 80%, p53 56.3%, bcl-2 51.3% and c-myc 53.8%. 2) c-erbB-2 showed no significant difference according to histologic types, grade, and lymph node metastatic status of breast carcinoma. 3) p53 showed higher expression rate in metastatic cases compared to non-metastatic cases, and it showed higher expression rate according to increasing of grade without significant difference. There is no significant difference according to types. 4) The expression rate of bcl-2 in breast carcinoma be lowed according to increasing of grade. There was no significant difference according to types, side, and status of lymph node metastasis. 5) c-myc showed higher expression rate in non-metastatic cases compared to and metastatic cases, and it showed decreasing expression rate according to increasing of grade without significant difference. There is no significant difference according to types. 6) p53 and bcl-2 in breast carxinoma showed reverse corre1ation(P < 0.05), and bc1-2 and c-myc showed close correlation without statiscally significance. Above results showed that p53 may be related to poor prognosis of the patients and c-myc may be related good prognosis in breast carcinoma. There was reverse correlation between p53 and bcl-2 and bcl-2 and c-myc may be correlated closely. c-erbB-2 and bcl-2 showed no interrelation to prognosis.

유기박막에서의 이온주입에 의한 Carbon Cluster의 형성과 그 전기광학적 특성

유영한,한득영 建國大學校 附設 産業技術硏究所 1993 논문집 Vol.18 No.-

It is well-known that electrical and optical properties of organic films can be modified by relatively low ion fluency. In this paper, dielectric organic thin films of quinacridone were fabricated by deposition on the glass and si substrates in the vacuum evaporator under the condition of 2×10? [Torr] and 450[℃]. And their electrical and optical properties were examined before and after nitrogen ion implantation under the various conditions. The resistivities of the quinacridone films have been decreased by 7 orders after N? ion implantation. It was also shown that their resistivities were independent of its substrates and that peaks in the absorption spectrum were disappeared with increasing the ion energy and N? dose quantity. Those properties can be explained by hopping current model in the carbon clusters created on the quinacridone thin film by ion implantation. Those technics may be used in the connection between organic devices for electronics.

도시하천의 환경 친화적 개선방안에 관한 조사연구

이길영,권득용,김영안,한천규 대전대학교 산업기술연구소 1999 산업기술연구소 論文集 Vol.10 No.1

The three main steams flowing through Taejon have some serious problems to be solved or improved. They are : First, the uniform cross section of the rivers should be changed. Second, the extension of the riverside road should be reconsidered. Third. the neighborhood parks on the flood plain should be modified. Fourth, the flood plain parking place must not be constructed. Fifth, the ecosystem will be destroyed by the structure constructed along the rivers. In this study, we suggest that the investment and research on the development of the new technology for the setting the rivers in natural condition should be needed now and the continuous investigation and long-term plan to preserve the ecosystem of the rivers should be required. The environmental conditions of Taejon-stream, Yudung-stream and Kap-stream are indicators of the standard of living of the citizens in Taejon. Now is the time to reconsider the careless construction around the rivers and to prepare the long-term plan for the protection of the ecosystem and natural environment.

유방암과 섬유선종의 방사선학적 소견 : 유방 단순촬영술과 유방 초음파검사 소견의 비교 연구 Studies on mammographic and ultrasonographic findings evaluation

임한혁,최득린,고은석,이혜경,임철완,이상진,홍현숙,최교창,김영화,박재성 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2

Purpose : To evaluate the utility of mammography and ultrasonography in study of morphologic differential diagnosis between malignant and benign mass. Materials and Methods : Average age of patients with breast cancer was 48.4 year-old, and that of fibroadenoma was 29.4 year-old. The equipments used for examination were MF-159 high frequency mammography(Bennet Co.) and Acoustic image 5200S. We evaluated mammographic findings about breast parenchymal pattern, calcification, margin and size of the mass associated tumor nature, and ultrasonographic findings about shape, height and width, internal homogenicity and echo pattern, wall contour, boundary echo, and posterior shadow in breast mass. Thirty-seven of mammographic findings and 34 cases of ultrasonogreaphic findings in pathologically proven breast cancer and 34 case of mammographic findings and 71 cases of ultrasonographic findings in breast fibroadenoma were reviewed retrospectively. Results : In mammographic study, the parenchymal patterns of breast cancer according to Wolfe classification were NI(16.2%), PI(24.3%), P@(37.8%), and DY(21.6%) and those in fibroadenoma were NI(3.1%), Pl(11.7%), P2(35.2%),and DY(50%). Mammographic findings about presence of calcification were as follows; only calcification(16.2%), only mass(51.3%), and mass with calcification(32.5%) in breast cancer, and only mass(91.2%), mass with calcification(8.8%) in fibroadenoma. The features of mass margins were classified as ill-defined margin(45.9%), well-defined(5.4%), and well-defined with partial spiculation(48.6%) in breast cancer and ill-defined(20.5%), well-defined(73.5%), and well-defined with partial spiculation(5.8%) in fibroadenoma. The mass were grouped by size; 1-2cm(37.8%), 2-4cm(45.9%), and 4-6cm(16.3%) in breast cancer and 1-2cm(79.4%), 2-4cm(17.6%), and 4-6cm (3.0%) in fibroadenoma. On ultrasonographic study, the shape of masses in breast cancer were lobulated(82.3%),oval(14.7%), and round(3.0%),and those in fibroadenoma were lobulated(14.0%), oval(57.7%), and round(18.3%). The cases that the height was longer than width were 32.3% in breast cancer and 0% in fibroadenoma. The findings about homogenecity and echo patterns were as follows; hypoechoic(52.9%) and mixed(47.1%) in breast cancer and hypoechoic(2.8%), hypoechoic(63.4%), and mixed(33.8%) in fibroadenoma. The margin of masses were smooth in 85.9% of fibroadenoma, and irregular in 73.6% of breast cancer. The boundary echoes of masses and decreased posterior echo shadow were seen only in 61.8% and 55.9% of breast cancer, respectively. Conclusion: The margin and calcifications are more clearly delineated on mammography but breast cancer and fibroadenoma, both are more commonly developed in dense parenchymal pattern(P2+DY),and there findings are easily obscured in mammography. So ultrasoography is very useful in these masses evaluation, especially amoung young patients.

二重 Langevin 振動子의 變壓特性에 관한 硏究

金漢星,任漢錫,韓得永 건국대학교 부설 산업기술연구소 1982 논문집 Vol.7 No.-

This paper suggests a new model of piezoelectric transformer fabricated with steel plates, piezoelectric ceramics, electrodes and thin insulators. And the transformation ratio and the phase difference of several kinds of those transformers were discussed. As a result, the transformation ratio can be increased by series connection of the output ceramic elements or parallel connection of the point ceramic elements. Phase difference between the input voltage and the output voltage was occurred by 90˚ when the transformer had the maximum transformation ratio. These characteristics seem to be applied to develop the high frequency power transformers.

공원묘지 유실에 의한 대량재해의 개인식별

강신몽,이한영,윤중진,이원태,김종열,이영석,서재관,최득린,서지석,이혜경 大韓法醫學會 1992 대한법의학회지 Vol.16 No.1

Individual identification of severely decomposed or skeletonized bodies is an important part in medicolegal field. 142 bodies were torn up and carried away by flood in a park cemetry, Kwang-Ju, Kyunggi province, Korea at Sept., 10, 1990. The authors examed the 56 bodies, which were gained, through medical, anthropological, odontological, radiological methods, and superimposition for individual identification. Among them, 41 cases were successfully identified, and remaining 15 cases were not identified because of sever destruction and no adequate information.

GaAs MESFET의 채널전하에 의한 전위장벽 강하특성

원창섭,안형근,한득영 건국대학교 산업기술연구원 2003 건국기술연구논문지 Vol.28 No.-

The gate leakage current is first calculated using the experimental method between gate and drain by opening source electrode. Next, the gate to drain current has been obtained with a ground source. The difference of two current has been tested and provide that the electric field that generated by channel charge effect to Schottky barrier height against the image force lowering effect.