• Korean Journal of Veterinary Research
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• v.15 no.2
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• pp.241-250
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• 1975

The light and electron microscopic observations were carried out in order to know the morphological changes of the testicular Leydig cells in the mouse injected with testosterone propionate for a long period. The results obtained were as follows: With the light microscopic study, atrophy of the Leydig cells and larger sudanophilic lipid granules in the experimental group than normal were observed. 2. By the electron microscopic finding, the small spherical or oval mitochondria, large lipid droplets, a decrease in number of smooth endoplasmic reticutum and distended saccular or vacuolar smooth endoplasmic reticulum were observed in the experimental group. Membranous whorls with droplet increased in number and size in the experimental group.

• Journal of ILASS-Korea
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• v.25 no.1
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• pp.15-20
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• 2020

This study aims to investigate injection rate and microscopic spray characteristics of diesel fuel containing fine air bubble (FBD). fine bubble was generated by cavitation theory using bubble generator. Fuel spray was injected into constant volume chamber and visualized by high speed camera. The injection rate data was acquired with bosch tube method. Injection rate of finebubble diesel was very similar with that of diesel. It showed slightly faster injection start by 5 ㎲ attributed to the low viscosity characteristics. In microscopic spray visualization, fine bubble diesel spray showed unsymmetric spray shape compared with diesel spray. It also showed very vigorous spray atomization performance during initial spray development. Improved atomization was also attributed to the low viscosity and surface tension of finebubble diesel fuel.

• Transactions of the Korean Society of Automotive Engineers
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• v.13 no.6
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• pp.7-12
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• 2005

In order to analyze the microscopic spray characteristics of free spray in ultra high pressure region, the droplets size and velocity of free spray injected under atmosphere condition were measured by PDPA. As injection pressure became ultra high pressure, the droplets size was decreased continuously due to the increase of mutual reaction between droplets and air. But the decreasing rate became moderate. The velocity was increased until 250 MPa, and then decreased over that of injection pressure. It was seemed that the droplet size was similar in range of $280\~350\;MPa$, but increased in 414 MPa, even though injection pressure was increased. The microscopic spray characteristics of free spray got worse in 414 MPa.

• Progress in Superconductivity and Cryogenics
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• v.16 no.2
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• pp.7-19
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• 2014

Since the discovery of iron-based superconductors in 2008, extensive and intensive studies have been performed to find the microscopic theory for the high temperature superconductivity in the materials. Electronic structure is the basic and essential information that is needed for the microscopic theory. Experimentally, angle resolved photoelectron spectroscopy (ARPES) is the most direct tool to obtain the electronic structure information, and therefore has played a vital role in the research. In this review, we review what has been done so far and what is needed to be done in ARPES studies of iron-based superconductors in search of the microscopic theory. This review covers issues on the band structure, orbital order/fluctuation, and gap structure/symmetries as well as some of the theories.

• Korean Journal of Pharmacognosy
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• v.34 no.3 s.134
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• pp.197-200
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• 2003

'Chong Myung So(聰明素)' is Chinese patent medicine, which is used for nervous prostration and neuritis in Korea. This preparation consists of 18 kinds of powdered crude drugs. For the identification of individual ingredients in such powdery mixtures, microscopic method may advantageously be used as it requires only a small amount of specimens. In this study, it is demonstrated that the microscopic method is very effective for the identification of 18 crude ingredients including in 'Chong Myung So'.

• Korean Journal of Pharmacognosy
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• v.35 no.1 s.136
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• pp.41-44
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• 2004

An Chung Hwan(安中丸) is a Chinesε patent medicine, which has been used for various purposes in Korea. An Chung Hwan is composed of 15 kinds of powdered crude drugs and has been used for stomachic disorder, acute and chronic indigestion, dyspepsia, and diarrhea. For the identification of individual crude drugs in such powdery mixtures, microscopic method may advantageously be used as it requires only a small amount of specimens. In this study, it is demonstrated that the microscopic method is very effective for the identification of 15 crude drug ingredients in An Chung Hwan.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.382-383
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• 2011

초고전압 투과전자현미경으로부터 생산된 2D 이미지들에는 고전압(1250 kV)의 사용으로 인한 다양한 노이즈가 발생한다. 따라서 2D 이미지로부터 3D tomogram으로 재구성시 선명도 향상을 위하여 2D 이미지의 노이즈 제거 과정은 필수적이다. 본 연구에서는 band-pass filtering 기법을 활용하여 노이즈를 상당 부분 제거하였고, 필터링된 이미지로부터 3D tomogram으로 재구성한 경우 band-pass filtering의 효과가 2D 이미지에서 뿐만아니라 3D tomogram으로 재구성 했을 경우에 어떤 대역의 filter radius를 적용해야 더욱 효과가 크다는 사실을 확인하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.289-290
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• 2011

• Tuberculosis and Respiratory Diseases
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• v.72 no.2
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• pp.197-202
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• 2012

Microscopic polyangiitis is a necrotizing vasculitis, characterized by inflammation of small vessels (capillaries, venules, and arterioles) with few or no immune deposits. The kidneys are the most commonly affected organs and are involved in 90% of patients, whereas pulmonary involvement occurs in a minority of cases (10% to 30%). In cases of lung disease, diffuse alveolar hemorrhage with pulmonary capillaritis is the most common manifestation. Microscopic polyangiitis is strongly associated with antineutrophil cytoplasmic autoantibody, which is a useful diagnostic serological marker. We report a case of microscopic polyangiitis presented as pleural effusion in a 67-year-old female. Pleural effusions have been reported in some cases previously, but the number of cases were small and their characteristics have not been well described. This report describes characteristic findings of pleural fluid and its histological features in a case of microscopic polyangiitis.

• Journal of Korean Society of Transportation
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• v.23 no.7 s.85
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• pp.137-148
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• 2005

The position information of individual vehicles on a road at every time instant can be used to analyze the microscopic behaviors of driving of each vehicle. The limited information obtained from previous imaging technology such as traffic volume and interval velocity cannot be used to explore such microscopic traffic conditions. Also, information gathering for the microscopic behaviors by manual analysis of captured video takes large amount of time and man-power. In the paper we develop the rule-based vehicle tracking technology from which the position information of individual vehicles on a road at every time instant can be automatically obtained. Also, we extract the position data of driving vehicles on a road, length of 130m for every 0.05 second, and calculate the velocity of each traced vehicles to compare with the real velocity for the verification of accuracy. In the future, this type of tracking techniques based on video analysis can be widely used to provide the practically important information of road traffic conditions and to analyze the academically important microscopic behaviors of driving patterns.