• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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• pp.501-504
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• 2006

Recently, the Ceramic Bricks are getting increased due to demolishing aged buildings. But, disposal of the waste ceramic bricks has been relied on just burying into the ground. Regardless they can be used with recycled thick aggregate. Therefore the range of this study includes the experiment of slump test, compression, strength test and stress-strain analysis to the concrete the recycled thick aggregate with made by ceramic bricks. The reducing method of fine aggregate will be reviewed stand on analysis of this experimental result.

• 대한수학교육학회지:수학교육학연구
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• 제12권1호
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• pp.71-79
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• 2002

Visualization have strong driving force that enables us to recognize abstract mathematics by direct and specific method in school mathematics. Specially, visual thinking helps in effective problem solution via intuition in mathematics education. So, this paper examines the meaning of visualization, the role of visualization in intuitive problem solving process and the methods for enhancement of intuition using visualization in mathematics education. Visualization is an useful tool for illuminating of intuition in mathematics problem solving. It means that visualization makes us understand easily mathematical concepts, principles and rules in students' cognitive structure. And it makes us experience revelation of anticipatory intuition which finds clues and strategy in problem solving. But, we must know that visualization can have side effect in mathematics learning. So, we have to search for the methods of teaching and learning which can increase students' comprehension about mathematics through visualization and minimize side aspect through visualization.

• 한국의류학회지
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• 제29권6호
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• pp.868-876
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• 2005

Silk fabrics were dyed with yellow natural materials. Gardenia, turmeric, amur cork tree, safflower, Japanese pagoda tree, and onion were used as natural materials. Color image of natural dyed silk fabrics was classified by 4 factors(Cheerfulness, Comfortness, Pastrol, Revealation). Cheerfulness factor affected significantly with color image. Amur cork tree or turmeric dyed fabrics were shown as light and cute, safflower or gardenia dyed fabric shown as comfort, and onion dyed fabrics shown as mature and simple. Color image with specialty was significant difference in Preference and Revelation factor. Preference was appeared as amur cork tree>turmeric>gardenia>safflower>Japanese pagoda tree>onion.

• 한국염색가공학회지
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• 제9권5호
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• pp.63-74
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• 1997

Polyurethane microcapsules were synthesized by interfacial polymerization in an aqueous poly(ethylene glycol) dispersion with ethylenediamine as chain extender of toluene diisocyanate in perfume oil using poly(vinyl alcohol) as the stabilizing agent. The effect of chemical structure on the average particle size and distributions, morphologies, and thermal properties to design microcapsules for the sustained release system was investigated. It came to be known that polyurethane microcapsules with ethylene diamine as chain extender had a rounder, more permeable and controlled release membranes. And the release test of polyurethane microcapsules with different soft segment content was done to certify the effect of long methylene chain. According to the higher molecular weight of polyether polyol, the release rate of microencapsulated disperse dye molecular was faster.

• 한국염색가공학회지
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• 제9권5호
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• pp.52-62
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• 1997

Abstract Polyurethanes have been designed and fabricated into membranes with unique separation properties. Moreover, polyurethane microcapsules also have been reported actively as controlled release materials for their excellent blood compatibility, tensile strength and permeability. In this study, polyurethane microcapsules were synthesized by interfacial polymerization in an aqueous poly(ethylene glycol) dispersion of toluene diisocyanate in perfume oil using poly(vinyl alcohol) as the stabilizing agent. The effect of a few important process conditions on the average particle size and distributions, morphologies, and thermal properties to design microcapsules for the sustained release system was investigated.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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• pp.681-684
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• 2008

The way to shorten a construction period is considered to an very important technology element as reducing the form work removal periods with promoting strength revelation own concrete. This study presents an experimental study on the development method, material for early strength concrete. The result is as follow : In OPC, the compressive strength has over 5MPa after 26hours at 20$^{\circ}C$ curing and another 36hours at 10$^{\circ}C$ curing. Used with early strength potland cement, the compressive strength has over 5MPa after 15hours at 20$^{\circ}C$ curing temperature and another 30hours at 10$^{\circ}C$ curing temperature.

• 한국환경보건학회지
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• 제35권6호
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• pp.538-541
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• 2009

Humans have a long history of asbestos use. There are reports from the Roman era, of asbestos victims among the slaves who worked in asbestos mines. The fact that asbestos can induce lung cancer and mesothelioma was verified epidemiologically in the 1960s. Asbestos related diseases are predominantly occupational in nature but can be caused by environmental exposure. Environmental mesothelioma is mainly associated with tremolite asbestos and this information comes from many countries including Turkey, Greece, Corsica, New Caledonia and Cyprus. In 1993, the first case of mesothelioma in Korea was reported in an asbestos textile worker. Recently, some asbestos disease victims who lived near an asbestos factory have their cases before the courts. A series of recent asbestos-related events in Korea, for example, the shocking revelation of asbestos containing talc in baby powders have caused the general public to become aware of the health risks of asbestos exposure. Asbestos related diseases are characterized by a long latency period, especially, mesothelioma which has no threshold of safety. Hence the best strategy for preventing asbestos related diseases is to decrease asbestos exposure levels to as low as possible.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2005년도 한국컴퓨터종합학술대회 논문집 Vol.32 No.1 (A)
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• pp.517-519
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• 2005

정부는 최근 IT839전략에서 RFID/USN(Ubiquitous Sensor Network)를 기반으로 한 정보화 추진 개념을 정립하였으며, 기술개발 및 시범사업 등을 통하여 이를 확산시키기 위한 기본계획을 발표함과 동시에 RFID/USN 시스템 도입이 적극적으로 추진되고 있다. 본 논문에는 RFID를 기반으로 한 세가지 USN서비스를 도출하고 구현한다. RFID 개념을 계승, 확장한 USN 서비스로 관리물품 도난방지 서비스, 무단 침입 경보 서비스, 사용자 인식 공간 서비스를 도출한다. 또한 본 논문에서는 스마트 단말기에 대한 소개를 하고 위 서비스들의 구현상의 설계 쟁점들을 고려한 서비스 시스템을 구현한다.

• 한국가구학회지
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• 제19권4호
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• pp.235-242
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• 2008

Increasing consumers' individuality and their desire of revelation, owing to accumulation of economic wealth, are making furniture designs more differentiated and various in its method and theme. Trends of contemporary furniture designs are changing from pursuing the functional efficiency of mere usage of their product in the past to satisfying the desire of consumers with full consideration of their emotional aspects, that is, the design that helps consumers communicate with products. In these trends, it is necessary to analyze the emotional factor of consumers for the examination of their emotional desire and apply its analysis to the furniture design.

• 대한의용생체공학회:의공학회지
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• 제17권4호
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• pp.545-552
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• 1996

Researches on chromosome are very significant in cytogenetics since a gene of the chromosome controls revelation of the inheritance plasma The human chromosome analysis is widely used to diagnose genetic disease and various congenital anomalies. Many researches on automated chromosome karyotype analysis has been carried out, some of which produced commercial systems. However, there still remains much room for improving the accuracy of chromosome classification. In this paper, we propose an algorithm for reconstruction of the chromosDme image to improve the chromosome classification accuracy. Morphological feature parameters are extracted from the reconstructed chromosome images. The reconstruction method from chromosome image is the 32 direction line algorithm. We extract three morphological feature parameters, centromeric index(C.I.), relative length ratio(R.L.), and relative area ratio(R.A.), by preprocessing ten human chromosDme images. The experimental results show that proposed algorithm is better than that of other researchers'comparing by feature parameter errors.