• Journal of fish pathology
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• v.7 no.2
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• pp.127-149
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• 1994

Histopathological studies on the two lymphomyeloid organs of spleen and head kidney in tilapia, Oreochromis niloticus, were carried out to clarify the significance on the morphological characteristics of melano - macrophage centers (MMCs) which are varied in different physiological and pathological conditions of teleosts. To examine the histological changes by the artificial modification of the immunological states, tilapia were treated intraperitoneally with FKC and LPS of Edwardsiella tarda, and orally with dexamethasone, and then followed by the intraperitoneal injection of colloidal carbon for chasing the macrophages. There were marked differences in phagocytic avidity of macrophages, and accumulating patterns of carbon - ladening macrophages into the MMCs among the test groups. In the non - pretreated control group, carbon - ladening macrophages were densely accumulated at 12th and 20th day within the MMCs of head kidney and spleen, respectively. And, in the groups treated with bacterial antigens (FKC & LPS), the macrophages were more rapidly and densely aggregated within MMCs. But in the group with dexamethasone, only a few carbon particles were detected in both organs. Any compactly isolated form of particles was not found in this group. From the present results, it was strongly suggested that certain changes in immunological states of tilapia influence on the morphology of MMCs including the frequency of appearance, sizes, aggregating patterns or outlines. Therefore, morphology of MMCs would be very important in the interpretation for histopathological findings seen in the teleost's lymphomyeloid organs.

• Journal of the Korea Society of Computer and Information
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• v.11 no.6 s.44
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• pp.1-8
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• 2006

Many researchers have been studied for the automatic chromosome karyotype classification and analysis. For the automatic classify the each chromosome which is the image in microscope, it is necessary to process the sub-procedure, ie. image pre-processing, implementing karyotype classifier. The image pre-processing proceeded the each chromosome separation, the noise exception and the feature parameter extraction. The extracted morphological feature parameter were the centromeric index(C.I.), the relative length ratio(R.L.), and the relative area ratio(R.A.). In this paper, the fuzzy classifier was implemented for the human chromosome karyotype classification. The extracted morphological feature parameter were used in the input parameter of fuzzy classifier. We studied about the selection of the membership function for the optimal fuzzy classifier in each chromosome groups.

• 한국해양학회지
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• v.13 no.2
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• pp.26-30
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• 1978

This work concerns morphological studies of Alaska pollak, Theragra chalcogramma(PALLAS), and of the Nogari which is generally known as an immature form of the Alaska pollack. Observations are made to see whether significant differences in the meristic and morphometric characters can be recognized between two groups. Four meristic characters, namely, first anal fin rays, first dorsal fin rays, gill rakers, vertebra and three morphometric characters, namely, head length, snout length, eye diameter are chosen for the study. Results of the analyses reveal that the differences in all the selected meristic characters between Nogari and Alaska pollack are found to be not significant. Differences in the snout length in relation to the head length are found to be not significant . However, the differences in the head length in relation to the body length and the differences in eye diameter in relation to the head length are both found to be significant. In spite of the lack of informations on genetypic variations, it is reasonable to state that the Nogari appears to be a juvenile form of the Alaska pollak, and the differences in certain morphometric measurements between two groups are likely to be associated with the differences in the relative growth rates during the life stages.

• The Journal of Engineering Geology
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• v.3 no.2
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• pp.149-165
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• 1993

Nowadays, the field hydraulic test is still an only method to evaluate groundwater characteristics in subsurface. The results of hydraulic test are very important for the concept model of fracture hydrogeology as well as the geometric pattern of fractures. The hydraulic tests performed in Korea are generally analysed under such assumption as steady radial flow in homogeneous aquifer or along simple geometry of fractures. Also the transmissivity measured in a fixed interval length is equivalent to a sum of individual fracture transmissivities in test legth. The boundary effects of weH hydraulics and the geometry of flow paths are hardly obtained from the test results analysed by a steady flow method. To circumvent this problem, the flow dimensional analysis was attempted from the results of constant pressure injection test carried out in a fractured granite area. A comparison of the hydraulic conductivity values from the transient and steady analysis shows that the latter is about a factor of 2~3 higher than the former. However, it was possible to analyse a flow dimension of each test interval from flow rate variation with time. The upper part of the bedrock(<10m deep) indicates an open boundary and the flow dimension shows nearly steady states, while the lower part of the bedrock(>25m deep) is characterized as sublinear flow dimension with a dosed boundary. In one of the test sections(15m deep), the flow dimension was changed from linear flow to spherical flow. From the experience of this study, one of the immediate problems to be solved is to enhance the field testing equipments, i.e., an accurate flowmeter with autorecording and a pressure detecting device to be able to install in the test section.

• Proceedings of the ESK Conference
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• 1993.10a
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• pp.220-220
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• 1993

체형은 남녀에 따라, 연령에 따라, 또 인종이나 시대에 따라 현저한 차이를 나타낸다. 특히, 인체의 목부위,허리둘레 등 연령에 따라 그 형태의 특징이 크게 변화해가는 부위들이 있으며, 이들 부위별 형태변화에 대한 연구는 전반적 체형연구와 함께 그 중요성이 크게 대두되어지고 있다. 이에 본연구에서는, 남성복의 드레스셔츠 설계에 가장 중요한 이체 부위인 목부위를 중심으로 연령 별 형태 변화를 측정하고자 하였으며, 측정은 슬라이딩 게이지법을 이용하여 목.어깨부위의 수직. 수평단면을 채취하였다. 또한 피험자를 20대 청년층, 40대 중년층, 60대 노년층의 세집단을 대상 으로 하므로서 목부위 단면형태에 대한 연령별 변화의 범위를 추측, 가령에 따른 변화의 상태를 생체학적으로 해석하고자 하였다.

• The Korean Journal of Rheology
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• v.9 no.1
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• pp.16-26
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• 1997

사출 성형된 제품에서 발생하는 잔류응력은 최종 제춤의 기하학적 정밀도와 기계적 성질 및 열적 성질에 영향을 미친다. 사출성형된 제품의 잔류응력을 예측하기 위해서는 먼 저 열 및 유동장의 해석을 수행하여야 하고이를 위해서는 사출 성형의 세단계. 즉 충전, 보 압, 냉각을 모두고려해야한다. 검사체적 방법에 기초한 혼합 유한요소/유한차분방법을 사용 하는 수치 해석적 기법에 의하여 충전과정가 후충전 과정의 유동장 해서을 수행하였다. 일 반화된 헬레쇼 유동을 가정하였고 보압과 냉각과정시의 고본자의 압축성을 고려하였다. 점 도의 전단 변형률의 크기와 온도에 대한 의존성은 개선된 크로스 모델을 사용하여 나타내었 다. Tait에 의해 제안된 상태방정식은 고분자의 온도, 압력, 부피의 상호관계를 묘사하는 좋 은 방법을 제공하였다. 유동해석을 통하여 전 공정에 걸쳐서 온도와 압\ulcorner장의 변화에 대한 데이터를 얻었고 제품의 고체 응력해석의 입력 데이터로 사용하였다. 유한요소응력해석에는 평면 응력요소를 사용하였다. 다양한 형태의 금형에 대해서 공정 변수들을 달리하여 유동장 의 해석과 잔류응력의 계산을 수행하였다. 이로부터 공정조건과 유동장의 관계를 밝히고 최 종 제춤의 잔류 응력에의 영향을 고찰하였다.

• Journal of Korean Association for Spatial Structures
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• v.10 no.2
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• pp.61-68
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• 2010

The collapsing accidents of pipe greenhouses in the farmhouse have been increased duo to heavy snow load. However, the study on exact structure analysis to prevent the collapse of pipe greenhouses is rare and the damage of the farmhouse is annually repeated. The method of existing structure analysis is basically made of linear elastic analysis based on the micro displacement. But the actual stiffness of the pipe greenhouse is significantly weaker than the stiffness of buildings and the load acting on the greenhouses gets to become relatively bigger. It means that the geometry shape of greenhouses changes so that the relation of strain-displacement gets to indicate a nonlinear behavior. Therefore, this study is performed to evaluate the structural safety so as to prevent the collapse of pipe greenhouses, which are the single-span greenhouse(farmhouse guidance shape, G) and multi-span greenhouse(farmhouse supply shape, 1-2W), by performing the large-displacement analysis considering nonlinear effects.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.664-667
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• 2011

In this paper, threshold voltage characteristics have been analyzed as one of short channel effects occurred in double gate(DG)MOSFET to be next-generation devices. The Gaussian function to be nearly experimental distribution has been used as carrier distribution to solve Poisson's equation, and threshold voltage has been investigated according to projected range and standard projected deviation, variables of Gaussian function. The analytical potential distribution model has been derived from Poisson's equation, and threshold voltage has been obtained from this model. Since threshold voltage has been defined as gate voltage when surface potential is twice of Fermi potential, threshold voltage has been derived from analytical model of surface potential. Those results of this potential model are compared with those of numerical simulation to verify this model. As a result, since potential model presented in this paper is good agreement with numerical model, the threshold voltage characteristics have been considered according to the doping profile of DGMOSFET.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.784-787
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• 2010

상담심리학적으로 미디어 치료에는 매체를 보고 듣고 느끼며 자아를 성장시켜 가는 감상주의적 치료와 매체를 직접 만들어가면서 자신의 감정과 생각을 매체에 투사하는 표현주의적 치료가 있다. 감상주의적 치료 예로는 사진보기, 영화, 미술관람, 책읽기 등이 있는데 내담자 스스로의 해석력이나 해석방법에 따라 심리학적 영향력의 유무가 결정되어서 이해력과 집중력이 부족한 내담자에게는 상담결과의 정확성이라는 한계가 있다. 표현주의적 치료 예로는 춤, 노래, 미술창작활동, 모래놀이, 연기활동, 영상제작 등이 있으며 이는 무의식의 발산을 가능케 하고 적극적 자기의사 표현하는 등의 장점이 있지만 창작활동의 특성상 개별 작업의 형태가 많고 제작기반 획득 등의 한계가 있다. 본 논문에서는 이 두 한계를 극복하기 위하여 표현주의적인 치료와 감상주의적 치료가 동시에 가능한 게임 미디어를 이용한 치료 가능성을 제안한다. 이를 위하여 이 치료에 적합한 게임의 구성요소와 게임의 시각 요소를 기술한다.

• Water for future
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• v.10 no.1
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• pp.71-77
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• 1977

The stream morphological characteristics of a watershed play a significant role in the analysis of rainfall-runoff relations in a river basin and a quantitative description of these characteristics is essential for determining the appropriate values of physical parameters of a watershed which usually are input data for rainfall-runoff simulation models. In this study the stream morphological characteristics of the Gab River basin, which is one of the three major tributaries of Geum River, was determined quantitatively by the Horton-Strahler's method. The result showed that the Gab River System was developed very closely to the patterns generally described by the laws of Horton. The basic relations concerning the morphological characteristics deriveed in this study are the relations of stream length, and average stream slope, the stream length-drainage area relation, relative height-relative drainage area relation, and the relation between the proportional stream order and drainage area. No correlation analysis was possible between the morphological parameters and the streamflow due to non-existence of the stage gauging stations on the Gab River System.