• 한국응용과학기술학회지
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• 제35권4호
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• pp.1327-1337
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• 2018

항공유는 문제가 발생 시 대형사고로 이어질 수 있기 때문에 다른 수송용 연료보다 더 엄격히 관리되고 있다. 항공유의 품질기준은 국내의 한국산업표준(KS), 미국재료협회(ASTM)와 국제운송협회(IATA)에서 각각 규정하고 있다. 2016년부터 2017년까지 국내 정유사의 5개 공장에서 생산되는 항공유에 대하여 방향족 함량, 황 함량 및 증류성상 등 6개 항목에 대하여 품질분석을 실시하였다. 국내에서 생산된 항공유는 품질기준에 적합한 것으로 나타났으며, 연간 일정하게 유지되고 있었다. 국제기준인 ASTM과 IATA의 품질기준과 비교했을 때, 방향족 함량은 국내 KS 기준이 ASTM 및 IATA 설정기준보다 1.5 wt% 엄격하게 설정되어 있으나 이 기준을 충분히 만족시키는 것으로 나타났다. 또한, 황 함량, 증류성상 및 인화점 등 나머지 항목들도 국내와 국제기준을 모두 충족하는 것으로 나타났다.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2000년도 제20회 KOSCO SYMPOSIUM 논문집
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• pp.93-104
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• 2000

Rivers of our country are in the serious state of water pollution because of sewages, factory wastes, domestic animal excreta, and so forth. The development of waste water treatment technology applied in a small-scaled farm is urgent because the government regulation becomes strict. In the present study, four types of solid fuels are made by blending domestic animal excreta, rice hulls and briquets, and its combustion characteristics is investigated by analyzing burning pictures. Domestic animal excreta sampled from a farm in Kimhae was dried with sunlight. From experimental results, it is shown that combustion characteristics of solid fuels becomes better by blending rice hulls which have superior ignitability. Since solid fuel made by blending domestic animal excreta with rice hulls can bum continuously, it can be appropriate for the heating fuels.

• International Journal of Industrial Entomology and Biomaterials
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• 제1권1호
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• pp.9-17
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• 2000

Genetic variation in the domestic silkworm strains (Bombyx mori) and phylogenetic relationships between domestic silkworms and wild silkworms (B. mandarina) were investigated by using a portion of mitochondrial CGI gene sequences. Ten geographic strains of B. mori we sequenced were identical in the 410 bp-section of mitochondrial COI gene. This sequence was also identical to the homologous sequence of the four Gen-Bank-registered strains, but one strain of B. mori differed a single nucleotide (0.2%) from others. MtDNA homogeneity in the B. mori strains appears to be resulted from fixation into the mast frequent mtDNA type during the course of breeding for new strains, in which an extensive indoor rearing and removal of unwanted individuals were accompanied. In the comparisons between domestic and wild silkworms, some wild silkworms were closely related to domestic silkworms (0.2%-1.2% of divergence), but the others were not (2.7%-3.7% of sequence divergence). This result was also reflected in the phylogenetic analyses, showing two independent phylogenetic groups: one including all B. mandarina sequences and the other including both B. mandarina and B. mori sequences. Thus, domestic silkworms may have been derived from the ancestor of B. mandarina, which belongs to this group, alto-ough more extensive study will provide better understanding on this issue.

• Management Science and Financial Engineering
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• 제16권2호
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• pp.39-51
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• 2010

Based on the literatures about MIS published in Mainland China and foreign journals from 2002 to 2007, this paper compares and analyzes the various research topics, research methods and the distribution of publication in MIS research. It brings forward three aspects of differences between the domestic and foreign MIS research and gives some suggestions to advance domestic research.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.162-167
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• 2009

With the introduction of the ubiquitous technology, the housing culture centers of construction companies have demonstrated future housing image and technology. However, ubiquitous home services are technology oriented items. The purpose of this study was to identify u- services which were realized in domestic future housing and to compare those with services the residents needed greatly refer to researches related to demand for u-service. For this study, field studies were conducted with 3 domestic future housings and precedent studies on demand for u-service were analyzed according to the standard of residents' demand. The results of the study showed that residents prefer u-services for security and control of indoor environment for housework and leisure life. As a result, u-services which residents needed mainly did not correspond with those that were displayed in future housing.

• 한국응용과학기술학회지
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• 제21권2호
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• pp.124-131
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• 2004

The adsorption of heavy metals in the waste water carried out on the various domestic clays and waste pottery. The effect of parameters such as pH, temperature, adsorption time and coexisting cations on the adsorption ability and characteristics were investigated to find out whether the clays could be used as adsorbents. Adsorption equilibrium was reached within 20 minutes on all the clays. The optimum pH was found to be above 5. When other cations such as Cu(II) or Zn(II) coexisted with Pb(II), the adsorption amount of Pb(II) decreased because of competing adsorption.

• 한국대기환경학회지
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• 제29권1호
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• pp.105-115
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• 2013

The Korean government amended the Environmental Technology and Industry Support Act to foster the environment industry and support the advancement of domestic environmental companies into overseas markets. The amended act reflects changes in the government's policies on environment related issues. This paper uses outcomes of research conducted on environmental policies in foreign countries and the current status of the domestic environment industry to present long-term strategic plans and measures to support the expansion of environmental companies into the global markets and to vitalize the environment industry at home. The suggestions for assisting domestic companies in making inroads into overseas markets are as follows: building up and expanding cooperative network; fostering promising companies and exports by making the right choices and focuses; diversification of export markets and strengthening supports for development of new customers; promoting supports for winning overseas projects; and developing cooperative projects to respond to climate change in developing countries using the Global Climate Fund (GCF).

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.462-465
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• 2002

KEPCO enforces the development about distribution automation technology continuously for 10 years and reached in fair level present. And distribution automation system was constructed actively meantime, its establishment will be completed 100% at late 2002s. Distribution automation system had been developed also in Japan, U.S.A and Europe etc. In japan, distribution automation system was established all business office to whole county. Lately, there is examining distribution automation expansion actively in developing country including China. Therefore, we try to analyze domestic and foreign technological variance as that examine foreign distribution automation trend and the development direction of domestic distribution automation technology forward.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2011년도 전기공동학술대회 논문집
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• pp.250-253
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• 2011

The cruise industry is one of the world's fastest growing device industry which is structural construction coasts are expensive. Cruise out-fittings are thirty times compare with general large vessels. According to the characteristics of materials or equipments, most equipments are imported from europe. At present domestic shipbuilding industries and minor enterprises have a hard times therefore enhancing technology for the cruise industry could be infused vitality on the industries. If domestic small and midium industries have high technology for the cruise ship, domestic small and midium industries can have global competitiveness compare with european equipment suppliers which has small-scale and high technology. Therefore on this study, cruise ship's new equipment development and a study for the performance assessment and classification type approval certificate was carried out.

• Journal of the Korean Wood Science and Technology
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• 제48권4호
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• pp.450-457
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• 2020

Single pellet press technology allows for fast, low-cost, and small-scale tests to investigate pelletizing characteristics. We estimated proper compression ratios for five Korean domestic wood species through predicted relationships between pelletizing pressure P_x and compression ratio based on experimental data obtained from a single pellet press unit. The pressures required to obtain a 6-mm-diam pellet of density 1200 kg/㎥ were estimated as 111 MPa for Populus davidiana, 133 MPa for Robinia pseudoacacia, 136 MPa for Quercus mongolica, 97 MPa for Pinus densiflora, and 127 MPa for Pinus rigida. On the basis of these pressures, we estimated proper compression ratios to be within the range 7.676-8.410 for these species, and we found the compression ratios needed for hardwood species to be somewhat higher than those needed for softwood species to obtain the pellet density of 1200 kg/㎥.