• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.699-700
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• 2007

• Proceedings of the Korean Information Science Society Conference
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• 2001.10b
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• pp.349-351
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• 2001

본 논문에서는 원 영상의 영역 분류와 웨이브렛 변환을 이용하여 영상의 밝기 변화에 관계없이 영상 검색이 가능한 알고리즘을 제안하였다. 이러한 방식을 통해 영상 전체에 대해 검색이 수행되지 않고, 영역 분류 결과인 블록맵과 변환 대역에서의 분산값 등 매우 소량의 정보만을 저장하고 이를 기반으로 영상 검색이 수행되므로 매우 빠르고 효과적인 검색이 가능함을 실험을 통해 확인하였다.

• Proceedings of the IEEK Conference
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• 2002.06d
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• pp.161-164
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• 2002

We propose a new method for rotational image retrieval that it is based on highly related property between a spatial image and wavelet transform. The characteristics have an important role in the design of our algorithm. Our proposed algorithm for rotational image retrieval is to obtain same image or rotated image. Because our algorithm used an rotational image retrieval.

• Korean Journal of Oriental Medicine
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• v.13 no.1 s.19
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• pp.37-42
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• 2007

As the cholera was spread over the Joseon dynasty at 1821, Hwang Doyeon investigated the symptoms like diarrhea, vomiting, muscle cramp and so on, and he presented the cause of cholera as the damage of Primordial-gi caused by abnormal climate and Damp-heat made by taking inadequate foods. He regarded as of great importance the ordinary health condition by guessing the prognosis of the disease, and proposed how to make a diagnosis of dehydration by observing nails and toenails. To treat cholera, he presented the methods of Sipseon-bloodletting and Singwol-moxacautery, and mentioned compound herb remedies and single herbs like garlic etc. He wrote down Mulberry leaves and Argyi wormwood leaves as the preventor of cholera to emphasize the importance of prevention, and mentioned food contraindication in addition to keep from getting worse.

• Journal of Korean Medical classics
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• v.30 no.3
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• pp.11-40
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• 2017

Purpose : The purpose of this article is to make a clarification that Hwang Doyeon(黃度淵) was a official doctor(醫官) who even served as royal doctor(御醫), rather than merely a general doctor who worked in the private sector. The article also attempts to give a new perspective on the medical history about the late period of Joseon(朝鮮) Dynasty. Methods : In researching Hwang Doyeon's master work, the Gains and Losses of Medical Orthodoxy(醫宗損益), the article looks at his clinical medicines. Analyzing the historical records, the article makes an assumption that Hwang Doyeon and Hwang Dosoon(黃道淳), who was selected as an officer to discuss medicine with other medical officers(議藥同參), are the identical person. On this assumption, the article tries to reinterpret the medicine during the later Joseon Dynasty period. Result & Conclusion : The records, including the royal medical treatment records of the Gains and Losses of Medical Orthodoxy, the Daily Records of Royal Secretariat(承政院日記), the genealogy of Changwon Hwangs(昌原黃氏世譜), academic paper and government documents released posthumously, demonstrated that Hwang Doyeon and Hwang Dosoon are the same person. If so, we can have new historical interpretation about medical history of late Joseon Dynasty. First, during the late of Joseon Dynasty, there was an official and active medical knowledge interaction between government and private sector. Second, the Joseon's medicine has been established its own medical system based on the Treasured Mirror of Eastern Medicine(東醫寶鑑), trying to cope with cholera and other contemporary epidemics without relying on Chinese warm disease(溫病) medicine. Third, the Compilation of Formulas and Medicinals(方藥合編), is regarded not only as a must-read medical reading for medical doctors, also playing an important role on popularization of Korean medical knowledge.

• Proceedings of the Korean Magnestics Society Conference
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• 2009.05a
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• pp.189-190
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• 2009

• Proceedings of the IEEK Conference
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• 2001.06c
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• pp.73-76
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• 2001

We propose a new method for image coding that it is based on highly related property between a spatial image and wavelet transform image. The characteristics have an important role in the design of proposed algorithm. This algorithm for image coding is to obtain high compression rate at low bit rate. The other side, the high activity regions are related to significant coefficients which give much influence to image reconstruction, because they mean the important factor to represent the appearance of images such as edge or boundary. For some images with low activity, we can obtain the reconstructed image with near to 30 dB at 150: 1 compression ratio.

• 한국전산유체공학회:학술대회논문집
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• 2009.11a
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• pp.19-26
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• 2009

The objective of this study is to investigate aerodynamic characteristics of a Horizontal-axis wind turbines(HAWT), using CFD method with a commercial code STAR-CCM+ version 3.06. To verify the reliability of the computations, the CFD results are compared with the experimental ones of the National Renewable Energy Laboratory(NREL) Phase Ⅵ HAWT. For the comparison and examination of aerodynamic characteristics, the existent shape with a predesigned twist angle was replaced by the one with one-dimensional linear twist angle. In this study, the pressure contour and stream line around the blade were analyzed as main focus. Through this study the more efficient shape of airfoil is suggested with consideration of manufacturing cost.

• 한국전산유체공학회:학술대회논문집
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• 2009.11a
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• pp.38-43
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• 2009

The objective of this study is to get a fundamental data for the shape of a robot which operates in blood vessels. The overall analysis was calculated with a CFD code. The flow was idealized as a pulsatile flow, and first the robot was assumed as a simple capsule model. Then a drag of the body in the flow was calculated, and this process was repeated, varying the shape. To validate all the result, the pulastile velocity simulation was compared with the theoretical data, and the drag of a body was compared with the existing data of the other papers first. Then with the next calculation the guideline for the design of robot shape was presented.

• 한국전산유체공학회:학술대회논문집
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• 2009.04a
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• pp.303-309
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• 2009

In this study, the heat transfer and flow field of condenser used on Kim-chi refrigerator is analysed with numerical method. Main objective is to present the base data for designing new condenser model with improvement of heat transfer performance. For CFD analysis, a commercial code, STAR-CCM+ was used. The water was used for the inner working fluid and the air was used for the outer fluid. The condenser type used in this study is a flat plate fin-and-tube heat exchanger. As factors for performance analysis, the effect of condenser geometry and air velocity was investigated. As a result, it has been observed that there is a suitable fin pitch with which heat transfer performance of condenser is maximized.