• Applied Microscopy
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• v.25 no.4
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• pp.115-123
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• 1995

This study was carried out to observe the functional ultrastructures of photoreceptor cells in frog(Rana catesbeiana) retina using transmission electron microscope. The photoreceptor cells are divided into two types-rod and cone cells-consist of outer and inner segment. The long outer segment of rod cell contains dense stacks of membrane and formed vertical and horizontal folds. The outer segment of cone cell is small, and vertical and horizontal folds are not exist. The electron dense cytoplasm of rod cell contains compact mitochondria, Golgi complexes, and endoplasmic reticula. The inner segment of cone cell shows low electron density and contains a large lipid droplet in the upper part of inner segment. In addition, cone cell contains many mitochondria, Golgi complexes. rough endoplasmic reticula, ribosomes and numerous glycogen particles. It is believed that these ultrastructural characteristics are closely associated with photoreceptive function of photoreceptor cells in frog retina.

• Toxicological Research
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• v.16 no.3
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• pp.229-238
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• 2000

The purpose of reproductive toxicity studies is to evaluate all effects resulting from paternal or maternal exposure that interfere with conception, development, birth, and maturation of offspring. In 1966, the US Food and Drug Administration (US FDA) published guidelines for a three-segment study for drug testing to examine adverse effects on fertility and pregnancy. Three segments were proposed: Segment I, Study of Fertility and General Reproductive Performance, to provide information on breeding, fertility, nidation, parturition, neonatal effects and lactation: Segment II, Teratological study, to provide information on embryo toxicity and teratogenicity: and Segment III. perinatal and Postnatal Study, to provide information on late fetal development, labour and delivery, neonatal viability, and growth and lactation. The classic guideline is still used to this day with only monor modification throughout the world. In the present review, the principles and methods of reproductive toxicity studies are discussed with special attention given to scientific issues.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.7
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• pp.1377-1382
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• 2012

In this paper, we propose a novel recognition method that extract source data from encoded signal that are displayed on FND mounted on home appliances. First of all, it find a candidate FND region from sequential difference images taken by smartphone and extract segment image using clustering RGB value. After that, it normalize segment images to correct a slant error and recognize each segments using a relative distance. Experiments show the robustness of the recognition algorithm on smartphone.

• MALSORI
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• no.47
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• pp.1-13
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• 2003

The purpose of this paper is to research the correlation between frequency and the deletion of /w, (equation omitted)/ in Korean. For this purpose, I select 11 words from the frequency data, then, analyze the speech of 20 speakers of standard Korean. As a result, I can find that there is correlation between the frequency and the deletion rate of segment. The rate of deletion is higher in high frequency words, while the rate of realization is higher in low frequency words. Although there is correlation between the frequency and the deletion rate of segment, the feature of segment, prosodic environments are more important in segment deletion.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2007.04a
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• pp.757-762
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• 2007

The lining segment which is the main structure of the shield tunnel consists of joints, not continua. Past international and domestic design data have been commonly used for design practices without specific verification about the structural analysis model, design load, and affection of the soil constant of the lining segment. In this study, the propriety is estimated through the comparison between analytical solution and numerical solution for segment analysis and design models of the shield tunnel which is being used internationally and domestically. As a result, the full. circumferential beam jointed spring model (1R-S0) is suggested by considering aspects of convenient use, application to field condition, and accuracy of analysis result. With suggested model, the parameter analysis was conducted for joint stiffness, ground rigidity, joint distribution, and joint number.

• Proceedings of the KSR Conference
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• 2003.05a
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• pp.251-256
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• 2003

This study focuses on the development of the conceptual criteria which could be applied to the speed-up strategy of urban rail operation. Down town segment or not, and peak hour or not are the criteria. The author suggests that in the case of down town segment and peak hour urban rail should take the all-stop pattern, if down town segment and off peak hour, then skip-stop pattern, if not-down town segment and peak hour, the A, B skip-stop, and if not-down town segment and off peak hour, the A, B, C skip-stop. If side lines, three rail, or 2 double lines, then express train operation is recommended in the peak hour. Then this study recommends speed-up strategies of each 8 urban lines.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.198-200
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• 2003

This study proved if the high resolution satellite imagery of IKONOS is suitable for preparing digital forest cover map. Three methods, the pixel based classification with maximum likelihood (PML), the segment based classification with majority principle(SMP), and the segment based classification with maximum likelihood(SML), were applied to classify and delimitate forest cover of IKONOS imagery taken in May 2000 in a forested area in the central Korea. The segment-based classification was more suitable for classifying and deliminating forest cover in Korea using IKONOS imagery. The digital forest cover map in which each class is delimitated in the form of a polygon can be prepared on the basis of the segment-based classification.

• Proceedings of the KAIS Fall Conference
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• 2003.06a
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• pp.328-330
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• 2003

A surface equation of state for globular proteins at air-water interface accounting for the molecular structure, segment-segment, segment-solvent, and electrostatic interactions was proposed and compared to C-14 isotope experiments. This lattice model comprised a simplifying assumption that all adsorbed segments are in the form of trains. The number of segment adsorbed per molecule in case of bovine serum albumin linearly depended on the surface concentration whereas the lysozyme segments adsorbed at the interface were independent of surface concentration. The segment-solvent(water) interaction for both of proteins were found to be unfavorable owing to the proteins unfolding. From comparison of model computation and experimental data, BSA unfolded more than lysozyne because of the larger surface area of contact.

• YAKHAK HOEJI
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• v.29 no.2
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• pp.70-75
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• 1985

The influence of polyethylene glycol derivatives on heparin release from cylindrical monolithic type silicone segment devices was examined in physical saline solution. This water-soluble carrier caused the devices to absorb the water in aqueous media. The release rate of heparin from the devices was increased as molecular weight of polyethylene glycol was increased. Water soluble carrier incorporated into silitone segment devices permits controlled release of heparin that otherwise would be released extremly slowly from the polymer. Heparin released from the silicone segment containing polyethylene glycol showed the first-order kinetics. Without changing the release-pattern, the release rate of heparin could be controlled by varing molecular weight of polyethylene glycol, the water-soluble carrier and depleting polyethylene glycol on the outlayer of devices. The mechanism of release probably showed the creation of pore or microdomine through the devices secondary to the swelling.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.06a
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• pp.202-203
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• 2019

최근 재난 발생 빈도가 증가함에 따라 재난이 발생 시 사람들에게 재난에 대한 정보를 전달하는 중요성이 부각되고 있다. 기존에는 재난이 발생 시 지역단위로 다양한 매체를 통해 사람들에게 정보를 제공 하고 있다. 하지만 지역단위(시군구 or 읍면)로 정보를 제공하고 있어 위험 발생지역과 동일 지역에 있더라도 위험 영향범위 내에 있지 않는 사람에게도 동일한 재난정보를 제공하고 있어 혼란을 야기 할 수 있는 문제점이 있다. 이에 본 논문에서는 재난 발생 지점을 기반으로 Segment 를 생성하고 관리 하여 위험지역의 사람들에게만 정보를 제공할 수 있는 Segment 기반 재난 정보 제공 시스템을 설계 한다. 제안한 시스템은 재난 발생 시 재난 종류에 따라 위험 지역을 세분화 하고 발생 지점을 중심으로 Segment 를 생성한다. Segment 에 포함된 인구를 추출하고 위험 지역 별로 재난 정보를 제공한다.