• 제목/요약/키워드: scale-up production

검색결과 346건 처리시간 0.026초

A Framework to Estimate GDP Loss due to Extreme Water-related Disaster in Kangwon-do

  • Kang, Sang-Hyeok
    • 한국방재학회 논문집
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    • 제7권5호
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    • pp.159-166
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    • 2007
  • Large scale flood disasters bring human losses and properties, which lead to the decrease of our productive value and change social environment. Human loss and economic damage are considered to be the same system but they are viewed as separated systems. The total amount of human loss can be represented as the total amount of economic damage estimated in the frame of social system while it will be possible to make mutual changing by clearing the relations between social and economic systems. In this regard, an attempt to estimate economic loss considering per capita Gross Domestic Production (GDP) caused by flood-related mortality was carried out to the typhoon Rusa of 2002 in Kangwon-do. The proposed method tried to capture quantitative factors which are affecting the loss of per capita GDP. The approach has great importance not only to set up governmental policy but also methodological progress in the research due to impact of disaster-related mortality on GDP loss.

Malmquist지수에 의한 세계 철강산업의 기술변화 (Technical Change of World Industry: a Malmquist Index Approach)

  • 김진한;정기대
    • 기술혁신학회지
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    • 제4권3호
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    • pp.369-382
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    • 2001
  • In this research, the world top steel companies' technical changes were measured by the nonparametric Malmquist index. Steel industry's production frontier which was composed of multiple inputs and multiple outputs was defined by using real data of the companies from 1986 to 1998, and then the variability of technical progress(or regress) was analyzed during that period. The dynamics of individual steel companies\` technical changes, periodical technical changes, and each country's technical chanties were explained. A matrix which was based on technical chanties, technical efficiency changes, and scale efficiency changes was designed to assist to find out current position and In build up future strategies. This research results will be an valuable input to the early stage of formulating competitive strategy because the technical core capability is an important source of the each companies's competitiveness.

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Pilot Study Analysis of Three Different Processes in Drinking Water Treatment

  • Kim, Dae-Ho;Lee, Byoung-Ho
    • Environmental Engineering Research
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    • 제16권4호
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    • pp.237-242
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    • 2011
  • In this study, three pilot-scale plants with the capacity 30 $m^3$/day were designed and set up to treat reservoir water for the production of drinking water. Three treatment processes were compared in the pilot testing: process 1 (coagulation- flocculation- sedimentationsand filtration- ozone- BAC); process 2 (coagulation- flocculation- sedimentation- microfiltration-ozone- BAC); and process 3 (coagulation- flocculation- sedimentation- sand filtration- GAC). The quality of water has been evaluated on the basis of selected parameters such as turbidity, color, consumption of $KMnO_4$, dissolved organic carbon (DOC), trihalomethane formation potential (THMFP), geosmin and 2-MIB. A detailed assessment of performance was carried out during a five months operation. Process 2 was found to have better removal efficiency of DOC, THMFP, geosmin and 2-MIB than process 1 and process 3 under identical conditions, although the removal rate of color was found to be the same in the three cases.

플라스틱 패키지되는 MMIC를 위한 저가격 고품질의 수직형 본딩와이어 인덕터 (Low cost high-Q veritcal inductor using bondwires for plastic-packaged MMICs)

  • 이용구;이해영
    • 전자공학회논문지D
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    • 제35D권7호
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    • pp.17-24
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    • 1998
  • We proposed a novel bondwire inductor buried in plastic package for low cost MMIC and characaterized the electrical perofmrance in a wide frequency range using the full-wave analysis of finite element method(FEM), and then we fabricated and measured the scale-up model in order to prove the characteristics. Th ebondwire inductor has higher quality factor and higher cutoff frequency than the conventional spiral inductor designed n the same area as the bondwire inductor. Since the air-bridge process is not requried for the bondwire inductor, it is very suitable for low cost plastic-packaged MMIC production. The bondwire inductor has the field distribution localized around the bondwire inductor and hence is more compatible to the crosstalk problems.

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합성강관 충전용 고강도.유동 콘크리트의 현장적용에 관한 연구 (Study on High Strength and High Flowable Concrete to be Filled in Steel Tube Columns for Practical Application)

  • 최응규;윤영수;이승훈;성상래;백승준;박원구
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1996년도 봄 학술발표회 논문집
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    • pp.370-375
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    • 1996
  • This paper presents a series of tests to produce the high quality concrete to be filled inside the steel tube columns. This concrete filled steel tube system requires not only the high strength, but also the high flowable concrete. Laboratory test has been performed to clarify the material characteristics and to produce the optimal mix design proportion. Full-scale site mock-up test has been then carried out to simulate the actual construction conditions including the production of concrete at the remicon batch plant, transportation to the construction site, proper workability and man-power required.

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Breeding of Bivoltine Silkworm Hybrids DP0308 and DP0314 in Sri Lanka : A Simplified but Practical Approach

  • Lea, Ho-Zoo
    • 한국잠사곤충학회지
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    • 제40권2호
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    • pp.97-104
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    • 1998
  • Mainly due to limited genetic resources available and also urgent need for hybrids suitable to local conditions, conventional theories and regular methods for bivoltine silkworm breeding are not easily applicable in such a tropical country as Sri Lanka which is recently planning to scale-up the silk industry. A simplified but practical methodology was introduced to overcome such constraints. Through application of such modified informal breeding methods, two hybrids named DP0308 and DP0314 were selected for cocoon production. Details of the altered method of germplasm improvement in the silkworm are presented, along with combining ability and heritability estimates for six parental pure lines in a half-diallel cross.

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초미립 WC-l0wt%Co 초경 분말의 소결시 입자 성장 억제제 첨가 효과 연구 (Effect of Grain Growth Inhibitor on Sintering of Nanophase WC-10wt%Co)

  • 김병기
    • 한국분말재료학회지
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    • 제1권2호
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    • pp.208-216
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    • 1994
  • A radically new approach to the in situ synthesis of the consituent phases of a composite structure has enabled the production of a new WC/Co materials with an ultrafine microstructure. The process for synthesizing nanophase WC/Co powders consists of spray drying from solution to form a homogeneous precursor powder, and thermochemical conversion of the precursor powder to the nanophase WC/Co powder. Near theoretical density of pure nanophase WC-10 wt%Co has been obtained in only 30 sec at 140$0^{\circ}C$. But WC particles were grown up very rapidly with longer sintering time to get full density. To overcome coarsening of WC particle during sintering, VC, TaC and VC/TaC were used as the grain growth inhibitor with different amount respectively. VC/TaC doped WC-10 wt%Co was shown superior hardness and TRS and microstructure was maintained ultrafine scale (average WC size is less than 0.1 ${\mu}{\textrm}{m}$).

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무주군 진도리의 생태마을 조성계획에 관한 연구 (A Study on Eco-village Planning in Chindo-ri, Muju-kun)

  • 장원;김경화;최귀선
    • 환경영향평가
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    • 제8권1호
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    • pp.141-146
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    • 1999
  • This paper proposes the planning and design of the Eco-village centering around Chindo-ri, Muju-kun. The Eco-village project has three basic objects the Eco-village residents' lives adapting to ecological principles such as regeneration and circulation, life agricultural techniques based on organic cycle, and residents' harmonious lives with the surrounding nature. For constructing of the Eco-village, first, the subject area was analyzed in terms of the natural and cultural environment and then, on this analytic ground the concrete concept and the specific plan were set up. The following details also should be considered: the scale of the residential household, the population, the space arrangement of the village, the material cycling structure, the waste treatment, the purification of the sewage, the energy supply, the landscape architecture, the production activity, the conservation of the ecosystem and so on.

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자동차탑재용 연료개질시스템을 위한 마이크로채널개발 (Microchannel Development for Fuel Processor of Automotive Applications)

  • 배중면
    • 한국전기화학회:학술대회논문집
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    • 한국전기화학회 2003년도 연료전지심포지움 2003논문집
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    • pp.89-95
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    • 2003
  • Fuel processing is an enabling technology for faster commercialization under lack of hydrogen infrastructures. It has been reported that the development of novel catalysts that are active and selective for hydrocarbon reforming reactions. It has been realized, however, that with pellet or conventional honeycomb catalysts, the reforming process is mass transport limited. This paper reports the development of catalyst structures with microchannels that are able to reduce the diffusion resistance and thereby achieve the same production rate within a smaller reactor bed. These microchannel reforming catalysts were prepared and tested with natural gas and gasoline-type fuels in a microreactor (1-cm dia.) at space velocities of up to 250,000 per hour. These catalysts have also been used in engineering-scale reactors (10 kWe, 7-cm dia.) with similar product qualities. Compared to pellet catalysts. the microchannel catalysts enable a nearly 5-fold reduction in catalyst weight and volume.

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생전분을 당공여체로 한 Stevioside의 당전이 반응의 동력학적 해석 (Kinetic Analysis of Transglycosylation Reaction of Stevioside Using Raw Starch as a Glycosyl Donor)

  • 박동찬;백승걸이용현
    • KSBB Journal
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    • 제9권2호
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    • pp.108-114
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    • 1994
  • 분쇄마찰매치 함유 불균일상 효소반응계에서 생전분을 당공여체로 한 stevioside의 당전이 반응의 kinetics에 관한 연구를 수행하였다. 생전분으로부터 CD를 생서하는 과정과 생성된 CD와 stevioside가 random sequenrial bireactant ,echanism으로 반응하여 당전이 equation을 유도하였다. 또한 유도된 반응식의 각종 kinetic constants을 평가하였다. 유도된 반응식을 Runge-Kutta integration법으로 계산하였으며, 계산 결과를 실험치와 비교하여 유도식의 효용성을 검토하였다. 유도된 kinetic equations는 당공여체인 생전분의 농도, stevioside의 농도, 그리고 중간산물인 CD의 농도 변화를 비교적 정획히 표시할 수 있었으며, 고효율 당전이 효소반응기 개발에 활용될 것이다.

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