• Journal of the Korea Institute of Building Construction
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• v.17 no.5
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• pp.403-409
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• 2017

In this study, mix proportioning of porous concrete with compressive strength and porosity exceeding 3MPa and 30%, respectively, was examined and then load capacity and flexural toughness of the porous concrete block were evaluated according to the different arrangements of the GFRP bars. To achieve the designed requirements of porous concrete, it can be recommended that water-to-cement ratio and cement-to-coarse aggregate ratio are 25% and 20%, respectively, under the aggregate particle distribution of 15~20mm. The failure mode of porous concrete blocks reinforced with GFRP bars was governed by shear cracks. As a result, very few flexural resistance of the GFRP was expected. However, the enhanced shear strength of porous concrete due to the dowel action of the GFRP bars increased the load capacity and toughness of the blocks. The porous concrete blocks reinforced with one GFRP bar at each compressive and tensile regions had 2.1 times higher load capacity than the companion non-reinforced block and exhibited a high ductile behavior with the ultimate toughness index ($I_{30}$) of 43.4.

• Journal of the Institute of Convergence Signal Processing
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• v.13 no.1
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• pp.6-11
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• 2012

Digital mammogram is effective for detecting the micro-calcification that is early symptom of breast cancer. In the digital mammogram, many image processing techniques have been studied for accurate diagnosis and efficient treatment of micro-calcification lesion. The wavelet based multi-scale method was mainly used to enhance the image contrast. This paper presents an advanced mammography enhancement method which is based both on the brightness and the contrast enhancement in the wavelet domain. The proposed method normalizes a dynamic range using histogram of the image. The brightness is enhanced by modifying coefficients of low frequency components, and the contrast is enhanced by coefficients of high frequency component based on the multi-scale contrast measure. The experiment results show that the proposed method yields better performance of the image enhancement over the existing methods.

• The Korean Journal of Financial Management
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• v.22 no.2
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• pp.43-69
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• 2005

This study provides empirical evidence that the stochastic beta model based on Bayesian analysis outperforms the existing conditional beta model and GARCH model in terms of the estimation accuracy and the explanatory power in the cross-section of stock returns in Korea. Betas estimated by the stochastic beta model explain $30{\sim}50%$ of the cross-sectional variation in stock-returns, whereas other time-varying beta models account for less than 3%. Such a difference in explanatory power across models turns out to come from the fact that the stochastic beta model absorbs the variation due to the market anomalies such as size, BE/ME, and idiosyncratic volatility. These results support the rational asset pricing model in that market anomalies are closely related to the variation of expected returns generated by time-varying betas.

• Journal of the Society of Disaster Information
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• v.11 no.1
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• pp.121-133
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• 2015

A classical commercial insurance, which is used widely as the risk management methods for risk transferring and risk financing, includes the factors of interests, gambling and uncertainty, In 1985 Islamic Fiqc Academy declared that the classical commercial insurance violates the Islamic fundamental principles and beliefs, alteratively recommending a mutual insurance and takaful. A basic principle of takaful is the mutual aid in the Islamic community. On the basis of mutual aid, takaful participants (insurance policyholder) establishes the takaful fund, which is cooperation fund by participant contribution. Takaful fund is separated from shareholders' fund, and the profit and loss of takaful fund are responsible for takaful policyholder. Ownership and operation right of takaful belong to the takaful participants. In takaful, takaful company takes a role of agent or management operator. Comparing to the classical insurance, takaful has the rights of profit dividend, voting of executives, access to accounting books etc. which are additional favors for business company or individuals as takaful participants. Business companies and individuals should consider to use takaful to transfer risk and to enjoy takaful's additional advantages.

• Applied Chemistry for Engineering
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• v.24 no.1
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• pp.18-23
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• 2013

In this research, the collagen peptide powder from flatfish skin (FSCP) was prepared and compared with commercial collagen peptide powder from tilapia scale (TSCP) in the aspect of physiochemical property. The physical property and nutritional components of FSCP appeared almost similarly to those of TSCP, and also in calorie. No differences in calorie between FSCP and TSCP. Amino acid contents of FSCP for example, aspartic acid, serine, histidine, tyrosine and methionine were higher than those of TSCP. In contrast, the hydroxyproline, proline, alanine contents in FSCP were lower than those in TSCP. Especially, the content of essential amino acid of FSCP, which was 22.74%, was higher than that of TSCP evaluated as 13.64%. In the distribution of molecular weight, FSCP was 1000 Da, which showed a comparatively low distribution compared with TSCP, and in emulsion property and stability both FSCP and TSCP showed an excellent trend.

• The Journal of the Korea Contents Association
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• v.8 no.8
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• pp.37-46
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• 2008

Launch control system controls the sequence for launching missile in weapon systems. This system have to generate the engagement plan, input information and launch the missile in timeliness requirement. Such a system may fail to operate correctly either due to errors in hardware and software or due to violation of timing constraints. We presented fault-tolerant ethernet for embedded real-time system like launch control system. This approach is designed to handle network faults using dual commercial-off-the-shelf(COTS) network devices. To support fault-tolerant ethernet each node is composed dual channel ethernet and designed the communication middleware for network fault detect and recovery. Especially for time-critical system, the middleware is being developed to achieve that no point of network failure shall take down or cause loss of communication to network nodes.

• The Journal of Dong Guk Oriental Medicine
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• v.4
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• pp.189-209
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• 1995

The purpose of this study is to understand a term of 'Jangbu theory 臟腑論' in 'Dong-Eui-Su-Se-Bo-Won 東醫壽世保元'. The conclusion would be summerized as follows. 1. 'Jangbu theory 臟腑論' of 'Sa-Sang medicine 四象醫學' is based on 'Sa-Sang structure 四象構造'. 2. 'Mind 心' of 'Sa-Sang medicine 四象醫學' is recognised as the Lord of body. 3. 'four-Jang 四臟' and 'four-Bu 四腑' constitute 'Sa-Sang structure 四象構造' which is based on the deviation of 'vital energy 氣', and 'four-Jang 四臟' plays a loading role. 4. 'Sacho 四焦' explains the whole function of human body including one's heart's desire, physical constitution and the visceral physiology. 5. 'ear-eye-nose-mouth 耳目口鼻' is connected with 'the profound secrets of nature 天機' and also has a close relation with creation of 'spirit-vital energy-blood-essence 神氣血精' and spiritual fuction. 6. 'SaHae theory 四海論' of 'Dong Mu 東武' is philosophical concept set on the basis of 'nature 天性' and 'life 人命'. 7. 'spirit-vital energy-blood-essence 神機血精' doesn't have the relation of mutual transformation. It's creation and consumption lies on 'the power of ear-eye-nose-mouth 耳目口鼻之力'. 8. 'Sa-Sang medicine 四象醫學' expands its theory centering on the deviation of 'vital energy 氣' and the transversal circulation of 'SaHae 四海' According to the above result, 'Jangbu theory 臟腑論' in 'Dong-Eui-Su-Se-Bo-Won 東醫壽世保元' should be understood on the basis of 'Sacho 四焦' and 'SaHae 四海' according to 'Sa-Sang structure 四象構造', accompanying philosophical thinking focused on human and society, the centural concept of 'Jangbu theory 臟腑論' could be said as 'Mind 心' to be the Lord of body.

• Journal of Haehwa Medicine
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• v.15 no.2
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• pp.75-93
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• 2006

Chang San-roe re-explained the contents from the 30th question to the 47th question of "Nan Jing" which refered to the Chang-Pu and physiological theories as follows through the western theory which wss different from the tranditioonal chinese theory 1. "Nan Jing" refered to the circulation and the coming into being of Yeong-Wi. He denied that it was classified Yeong from Wi or Eum from Yang. 2. He denied that Sam-Cho was separated to three parts and the theory of "Sam-Cho is name only, not shape", using western medical theory. 3. He denied the view about "Left side is kidney, right side is Myung-Mun" because it was incorrect that kidney was separated to two parts which were Su and Hwa or Eum and Yang 4. Re-explaining the contents of "Nan Jing"- the portions of heart and lungs, the rising and falling of liver and lungs, the relationships of five viscera and sound color smell taste fluid, the relationships of five viscera and nine hole, the relationships of five viscera and O-Chu, the physiological difference of the old and the young owing to the deflection of Yeong-Wi Chi-Heol- he thought that viewing the human body using theory of Eum and Yang, Five elements(五行) was a far-fetched interpretation, so he denied the tranditional chinese theory which understood human body's organs, physiology, pathology. 5. He explained the contents of "Nan Jing"- the portions of the colon and the small intestines, the funtion of the six bowls, the corespondence of Chang-Pu, physical peculiarity of liver, the anatomical aspects which were the sizes, weights, volumes and shapes of the Chang-Pu and the alimentary canal, Chil-Chung-Mun, Pal-Hoe-Hyeolthrough western anatomy and physiology in detail.

• Journal of the Korea Society of Computer and Information
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• v.11 no.2 s.40
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• pp.329-339
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• 2006

This study did not only raise the necessity of inter-governmental cooperative relations, but explored the plans to induce the more desirable cooperative relations. Accordingly, the study aimed to explore the plans to induce the desirable inter-local governmental cooperative system for festering and developing the sound local governmental system by the indexes of human cooperative capacity as policy means for establishing inter-governmental cooperative relations. The findings show that the behavioral factors of local administrators in the process of inter-local governmental cooperation are characterized by the fact that they belong to the necessary factors for inter-governmental cooperation, though different in extent. Based on this, the present study is expected to lay groundwork for the empirical studies of behavioral characteristics of local administrators in the future.

• The Journal of Korean Medical History
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• v.16 no.2
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• pp.17-34
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• 2003

지금까지 서양의학의 도입이란 측면에서만 조명되어온 정약용의 의학사상은 이제 한의학 이론의 발전과정이라는 새로운 관점에서 재조명할 필요가 있다. "의령(醫零)"에서 나타나는 그의 의학사상에는 미끼 사카에가 지적한 바와 같이, 음양오행론(陰陽五行論)에 입각한 "소문(素問)"의 병리론과 음양(陰陽)으로 논해온 '근시(近視)'에 대한 기존 이론에 대해 서학(西學)의 사행설(四行說)과 갈렌생리학, 그리고 광학이론을 가지고 비판을 가한 측면이 있다. 그러나, 좀 더 자세하게 검토해 보면 이런 서학(西學)의 영향은 정약용의 의학사상을 구성하는데 있어서 부분에 불과할 뿐만 아니라 그가 구상하고 있던 새로운 철학을 위해 취사선택된 것임을 알 수 있다. "육기론(六氣論)"에서 제시되는 사정설(四情說)의 경우, 서학의 사행설(四行說)을 그대로 답습한 것이 아니라 자신의 주역(周易)철학의 소산이다. 서학(西學) 뿐만 아니라 명대(明代)의 온보학파(溫補學派) 특히 장경악(張景岳) 의학사상의 영향도 주목해야 한다. "의령(醫零)"에서 논의된 의론(醫論)의 상당부분에서 장경악(張景岳)의 "전충록(傳忠錄)"과의 연관성이 상당히 많이 발견된다. 그러나 장경악(張景岳)이론의 정치(精緻)한 면에 대해서 찬사를 보내고 있지만, 그의 숭고주의(崇古主義)와 정치(精緻)한 음양오행(陰陽五行)에 대한 논의에 대해서도 동의한 것은 아니다. 정약용은 서학(西學)과 장경악(張景岳)을 비롯한 온보학파의 의학사상을 종합한 토대위에서, 즉 원기(元氣)의 운행(運行)이란 관점으로 의학을 재구성하려는 시도를 했다고 평가된다. "육기론(六氣論)"에서 시작된 육기병리설(六氣病理說)에 대한 비판은 "외감론(外感論)"에서 "이증론(裡證論)"을 거쳐 "허실론(虛實論)"으로 이어지면서 오행상극설(五行相剋說)에 의거한 병인론, 삼음삼양론(三陰三陽論)에 의거한 경락장부론(經絡臟腑論), 내외상론(內外傷論)을 모두 반박하면서 이러한 새로운 의학을 건설하려 하였다. "허실론이(虛實論二)"에서 장경악(張景岳)의 "풍한적체(風寒積滯), 담음어혈지속(痰飮瘀血之屬), 기불행칙사불제(氣不行則邪不除), 차기지실야(此氣之實也)."라는 말을 인용한 점은 이런 점에서 시사하는 바가 크다.