• Journal of the Korea Organic Resources Recycling Association
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• v.8 no.4
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• pp.93-99
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• 2000

Treatment of shaving scrap, a chrome containing solid scrap generated by leather manufacturing process, has been so far depended on mainly incineration, soil landfill and ocean dumping, which give bad impact on environment and cause pollution. Shaving scrap generates from the mechanical work for controlling the final thickness of leather and its main components are collagen protein and pan of chromium compound. For the purpose of reusing this leather waste as resources, researches in connection with collagen fiber recovery, gelable protein recovery and liquid fertilizer is being speedily progressed. In the experiment, shaving scrap went through wet pulverizing treatment by physical and chemical methods. Then, making the leather sheet evenly, it is mixed with natural latex and every kind of binding materials in the container, and the mixtures were passed through experimental hydraulic press machine and applied to Fourdrinier machine respectively. Lastly, a test for fading out physical strength and properties of multiple-purpose of leather-like material was performed on a continuous leather sheet prepared by the experiment. In result, the physical strength and properties of leather-like material showed noticeable differences according to mixing ratio of binding materials, beating methods and the Ends of binding materials selected, and generally tear strength was the weakest property among others. Also, by the pilot scale experiment in sequence, it was possible to manufacture recycled goods made of soft and hard types of leather-like material with various performances.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.5
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• pp.502-511
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• 1994

Investigated were the relationships between plumule elongation characteristics and seedling emergence of 98 varieties including native, improved and red rice varieties of Korea, and varieties from U.S.A., Italy, Japan, etc. under proper and excess soil moisture regimes. Under excess soil moisture condition the seedling emergence and establishment rates were much lower in most of the varieties and the seedling emergence rates were delayed substantially in all varieties employed. The seedling emergence rates were lowest in dwarf and some semi-dwarf varieties showing poor plumule elongation under proper soil moisture condition. The seedling emergence and establishment rates were significantly correlated with the length of mesocotyl, coleoptile and incomplete leaf under both soil moisture regimes, and with the lower first and second internode length under excess soil moisture condition. Average emergence duration showed significant negative correlation with the length of mesocotyl, coleoptile and incomplete leaf under both soil moisture regimes and significant positive correlations with the first and third lower internode length. Based on the standardized partial regression analysis only the variations of mesocotyl and coleoptile length contributed significantly to the varietal difference in seedling establishment rate, and so did the variations of mesocotyl and incomplete leaf length to the varietal differences in emergence speed. In conclusion varieties with greater elongation characteristics of mesocotyl, coleoptile and incomplete leaf are desirable for higher and speedy seedling establishment in dry-direct seeding.

• Journal of the Korean association of regional geographers
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• v.13 no.6
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• pp.695-711
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• 2007

Research on intercountry adoption was strongly needed in Korea; however, there were only a few research in geography on the United States. It is hard to find the geographical research on Korea-born adoptees in Europe. This research analyzed spatial distribution of Korea-born adoptees in Europe where adopted the largest number of Koreans after the United States. Since 1956 when Korea-born children were first adopted in Norway, the number of adoptees had increased rapidly until 1978. In the early 1970s, Korean children had adopted more in Europe than the Unites States. Even though the number of intercountry adoptees temporarily decreased after the Seoul Olympic in 1988, Korean children have been still adopted at a settled numbers. In the beginning period (1956$\sim$70) of adoption in Europe, the Korean war orphans and abandoned children were adopted by Sweden, Norway and Belgium. In the second period (1971$\sim$90), the number of Korean adoptees were social orphans as a result of rapid industrialization. The number of adoptees increased rapidly and their destination extended into ten countries including the Western Europe such as France, Germany, Italy and United Kingdom. In the third period after 1991, the adoptees were mainly from unmarried mothers. The number of adoptees decreased as the result of that the Korean government attempted to reduce the intercountry adoption and to increase the domestic adoption. Their destination reduced into Northern European countries, France and Luxemburg. Those countries kept adopting settled number of Korean children. Female Korean adoptees used to outnumber male Korean adoptees; however the sex ratio was reversed recently. The age of adoptees became to lower, so most of Korea-born adoptees were under one-year old.

• Korea journal of population studies
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• v.30 no.2
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• pp.45-69
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• 2007

This study analyzes differences of self-rated health status between Korea and three European countries. Self-rated health status is highly correlated with objective health status such as chronic diseases and ADL(Activities of Daily Living)/IADL(Instrumental Activities of Daily Living), but it is also influenced by individual attitude or belief about health. Therefore, differences of self-rated health status among countries are determined by the combination of (1) differences of objective health status and (2) socio-cultural characteristics affecting individuals' attitude and belief. Using 'Korean Longitudinal Study of Ageing(KLoSA 2006)' and 'Survey of Health, Ageing, and Retirement in Europe (SHARE 2004)', we found that Korean older people are more likely to feel negatively on their health status than their European counterpart. The findings are explained in two different ways. First, how strongly the objective health status affects on the subjective health status varies among countries. Korean older people with chronic diseases are more likely to evaluate their health status negatively because of the diseases than their European counterparts do. Second, after controlling the effects of the objective health condition, the subjective health status of Korean older people is still lower than that of the European elderly.

• Archives of design research
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• v.12 no.2
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• pp.31-40
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• 1999

Because of the oocIear family due to the rapid industrialization and the growth of husband and wife bah working, the base of the tradition that the parents, all of the famly or the hamet oonmunity bring up the infants together in the important time to the infarts has been collapsed in Korea. Because working mothers camot bring up their children by themselves they got stressed and housewives do not have the oonfidence in rearing their infants and the fathers are isolated from home and the chikten instead of being exempted from the responsibility of rearing children. Therefore the common and comprehensive rearing system should be made for solving the child-rearing problem. For solving these problems and for the desirable infant-rearing and education, the joint irlart rearing, whidl compensates for the life, education and furthermore the sdlool edJcation through the volur1ary participation, has been prepared altematively. Compared to the traditional rearing system, joint infant-rearing is not only operated by the residents with the dues paid by the union members but also makes children experience the life force of natu"e in themselves. So the preparation of the standard of the suitable environment design for the joint infant-rearing is required which is diffrent from the traditional standard of the environmertal facilities for the traditional rearing system. The concept of joint infant-rearing was defind in this study through the reference and the ooncept of infant edJcation which is in operation suocessfully in Italy and Sweden in order to understand how the ooncept of infant education has changed as the ages have dlanged. And the basic principals for the formation of physical envirorvnert and the spare design and the envirorYnertal oondition for the practical environmental design was also studied through the reference. And after study about the concept. figure and physical environmental suggestion, the concept, standard and element of joint infant-rearing environment design was suggested. And as the final conclusion, the design requirement of the envirorvnertal design for the joint infant-rearing was suggested.

• Journal of Sericultural and Entomological Science
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• v.21 no.1
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• pp.46-49
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• 1979

These experiments were made in order to compare the productivity of various varieties of F$_1$silkworm eggs imported from foreign sericultural countries with the productivity of some F$_1$silkworm eggs varieties produced by Turkey. The results are summarized as follows: 1. In the durations of whole instar, it lasted 30∼38 days under natural rearing conditions but Jam 107${\times}$Jam 105 about 30 days. 2. Cocoon yield per case of silkworm eggs was shown significantly among the varieties. Thaiei ${\times}$ Choan was the highest yield of cocoon, followed by Isonzo, Piave, M-198, M${\times}$N, S${\times}$P, J${\times}$C and Jam 107${\times}$Jam 108 in that order. 3. In the percentage of cocoon shell, M-197 was the highest and other varieties were almost on the same level of cocoon shell, but Jam 107${\times}$ Jam 108 was the lowest percentage. 4. In the weight of a cocoon, Choan${\times}$Thaiei was the heaviest, followed by S${\times}$P, C${\times}$J, M${\times}$N, M-197, Piave, Livenzo and Jam 107${\times}$Jam 108 in that order. 5. In the raw silk percentage of fresh cocoon, Choan${\times}$Thaiei, 3 Italian varieties and Turkish M${\times}$N. C${\times}$J belonged to the first group of better raw silk percentage, followed Polish M-197 and Jam 107${\times}$1am 108 in that order.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.4
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• pp.1272-1277
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• 2010

Target detection and tracking wireless sensor network must have various signal processing ability. Wireless sensor nodes need to light weight signal processing algorithm because of energy constraints and communication bandwidth constraints. General signal processing algorithm of wireless sensor node consists of de-noising, received signal strength computation, feature extraction and signal compression. Wireless sensor network life-time and performance of target detection and classification depend on sensor node signal processing. In this paper, we propose energy efficient signal processing algorithm using wavelet transform. The proposed method estimates exact target position.

• Journal of the Korean Society of Radiology
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• v.1 no.2
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• pp.23-30
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• 2007

This paper presents a method of generating 3-dimensional images by preprocessing 2-dimensional abdominal images obtained using CT (computed tomography) and MRI (magnetic resonance imaging) through segmentation, threshold technique, etc. and apply the method to virtual endoscopy. Three-dimensional images were visualized using indirect volume rendering, which can render at high speed using a general-purpose graphic accelerator used in personal computers. The algorithm used in the rendering is Marching Cubes, which has only a small volume of calculation. In addition, we suggested a method of producing 3-dimensional images in VRML (virtual reality modeling language) running on the Web browser without a workstation or an exclusive program. The number of nodes, the number of triangles and the size of a 3-dimensional image file from CT were 85,367, 174,150 and 10,124, respectively, and those from MRI were 34,029, 67,824 and 3,804, respectively.

• Journal of the Korean Society of Clothing and Textiles
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• v.40 no.2
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• pp.203-220
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• 2016

This research analyzed characteristic changes in trading areas and the success factors of popular fashion trading areas (Garosu-gil, Dongdaemun, and Itaewon). This research adopts a social network analysis method to semantically analyze trading areas. Articles on the three fashion trading areas were located through KrKwic software to extract keywords and calculate word frequency. Keywords with high frequency were placed through NodeXL software to identify relationships among keywords. Researchers created a network of relationships among trading areas and between past and present of trading areas to analyze and visualize. In the past (2008-2009), the trading areas of Dongdaemun, Garosu-gil and Itaewon were placed horizontally with a limited number of shared keywords between them. However, the three trading areas retain diverse rage of keywords and an organic realtionships five years later (2013-2014). Compared to the past, all three areas see the emergence of relevant fashion keywords such as 'designer', 'design', 'brand'. Additional cultural keywords such as 'culture/art/performance', 'exhibition', and 'event' have commonly appeared and imply that related industries are an important factor as well. Fashion companies that consider evaluating areas for a new store opening need to understand the trading area characteristics and select the most suitable area. In addition, it is necessary to equip the trading area with basic fashion elements as well as relavant industry when the government tries to develop fashion trading areas.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.6
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• pp.1099-1107
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• 1992

The apparent strain of temperature self-compensated strain gages at cryogenic temperature is presented. By joining the international round robin test on electrical strain gages at cryogenic temperatures, apparent strain curves of up to the fourth order with respect to the temperature are obtained with different strain gages and different materials. The liquid nitrogen and the liquid helium are employed to get the cryogenic environment. The results can be effectively utilized to determine the real strains by mechanical loading at cryogenic temperature. This paper also describes the optimal selection of strain gages and test materials for the use of strain gages at cryogenic temperature.