• Title/Summary/Keyword: Domestic variety

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Effectiveness Analysis for Required Capabilities of Tilt-rotor UAV (틸트로터 무인기의 요구능력 효과도 분석)

  • Lee, Ki Young
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.21 no.2
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    • pp.15-20
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    • 2013
  • In order to set up the optimal required capabilities to satisfy a variety of domestic and foreign demands for the Tilt-rotor UAV, MOE(Measure of Effectiveness) hierarchy was designed through an expert discussion, and the weight of the MOE was determined by utilizing AHP method. The independent MOE assessment on the required capabilities was accomplished for the current configuration, available alternatives and foreign competitive UAVs. Finally the cost-effectiveness for the alternative and competition UAV was analyzed.

The Necessity Analysis of Development Waterproofing Materials and Methods of Construction Technologies for Green Roof (옥상녹화를 위한 방수재료 및 공법개발의 필요성에 관한 분석)

  • 권시원;오미현;강효진;오상근
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2003.05a
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    • pp.107-111
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    • 2003
  • The need for this study must be considerable, as being activate of green roofs research that the organization and construction obtain access to more development technologies. Nevertheless, the green roofs system has begun to apply since 1980's, the green roofs technology was restricted to develop without verification of technologies such as a load or water leakage. There is a limit as urethane waterproofing to almost domestic waterproofing materials and methods of construction for general green roofs. The introduction of materials and methods of construction which are appropriated to property of green roofs could be a decisive factor in a long-range durability and economical maintenance cost, moreover. it support to variety construction system and organization. This present paper describes a necessity of waterproofing and root barrier system is one of the sub-organization based on green roofs construction. which have enormously large impact on the durability.

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A Case Study on the Application and History of Stuts System using the Underground Excavation Construction (지하굴착공사에 적용되는 버팀 시스템의 변화와 적용 사례연구)

  • Lee, Jung-Jae;Jung, Kyoung-Sik;Roh, Bae-Young;Kim, Hong-Taek
    • 기술발표회
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    • s.2006
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    • pp.54-65
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    • 2006
  • Since timbering of a cut in association with underground excavtion work is introduced to domestic, in spite of limitation of special quality in this method, time change, variety of construction, Strut Method is still considered with general methods. Experts have developed methods which is improved in limitation of special quality by continuous studies of normal strut method in basic, and it has been applied to construction site Consequently, this study introduced improved Strut Method to help experts when they select resonable methods with regard to construction site, conditions

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Studies of Case on Hazard Analysis Applying Top-Down Modelling Technique (하향식 모델링 기법을 적용한 위험 분석 사례 연구)

  • Hong, Seon-Ho;Hong, Sun-Hum
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1289-1293
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    • 2008
  • A technology for inevitable integration as well as an ability of development of technology according to professional fields is needed and supported for securing technology in the era of international competition. In other words, advanced business technique and technology applied for streamlining of management are required and the relations between operations and systems could be clarified. This paper reviews the course for development of process used in the systems engineering and business administration and tries to seek the way of training professionals in a variety of fields for elevating domestic technologies in different fields to the international level. Particularly, it tries to get the way of overcome the present technical restriction that depends on imports through matching a hazard analysis method with the method above mentioned. Especially, it tries to present the way of contributing to securing software safety on the basis of the importance of development of process model that takes the life cycle into consideration.

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The role natural resource planr new function

  • Lee, Myung sun
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2001.11b
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    • pp.5-10
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    • 2001
  • It is necessary for governmental supporting polices to collect. management and maintain the genetic resource with respects of diversity of useful natural resource plant and domestic variety for plant industry. There are the main tasks of functional plant industry to develope the techniques of systemic management of genetic resources with sufficient life because of having the key of human's fate with life and death and being the valuable thing to be Investigation. collection and introduction of genetic resource with natural resource plants. Agriculture after WTO is putting an emphasis on the development of functional plants with highly competitiveness In world market under long term and organizing plants Genetic resource of plant in the official institution are maintaining and managing to be possible the regeneration and reproduction if necessary. and utilizing whoever need them.

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One Dimensional Analysis for Dynamic Characteristics of Turbopump-fed Liquid Rocket Engine (1-D 모델링을 통한 터보펌프식 액체로켓 엔진의 동적 특성 해석)

  • Son, Min;Ku, Ja-Yeo
    • Journal of Aerospace System Engineering
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    • v.4 no.1
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    • pp.1-9
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    • 2010
  • As the rocket KSLV-1 called NARO was launched lately, development of domestic rocket technology has been accelerated elastically. Since the rocket technology needs a lot of empirical data, a variety of experiments should be done and lots of time have to be spent for accumulating the foundation of technology. However using a computer can be the solution to close a gap of technique because the simulation can be executed in short time against real experiments and calculate a multiplicity of cases easily. In this research, the transient analysis of turbopump-fed liquid rocket system was worked by the one dimensional modeling. The rocket system consists of the modulized components that are engine, turbopump and so on. For 70 ton class system, the rocket transient process of starting was studied and the performance analysis in steady condition was achieved. In addition, the estimation of nozzle internal flow was investigated by using a nozzle coefficient.

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Technical Trends of Steel Sleepers (철침목의 기술동향)

  • Yoon Hee-Tack;Chang Se-Ky;Park Young-Kon;Kim Young-Ki;Jung Woo-Sung
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.977-981
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    • 2004
  • Variety of recent railroad markets arouses the need for steel sleepers. Steel sleepers have many advantages over conventional timber or PC sleepers with respect to safety, environment and economical efficiency due to less effort for maintenance. Weak points of timber sleepers are to cut trees and apply toxic creosote as well as to need frequent maintenances while it is difficult to apply PC sleepers to steel bridge or crossing and to recycle them completely. In this paper, technical trends are analyzed in order to develop suitable steel sleepers for domestic railroads.

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RETROSPECTIVE MULTICENTER STUDY OF CSM ENDOSSEOUS DENTAL IMPLANT

  • Park, Eun-Young
    • The Journal of Korean Academy of Prosthodontics
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    • v.45 no.3
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    • pp.321-328
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    • 2007
  • Statement of problem. To work the economic limitation of dental implant usage, some types of domestic implant have been developing. But, there have been seldom reported about the clinical success rate of them as yet. Purpose. The aim of this retrospective multicenter study was to evaluate the performance of CSM implants(CSM company, Daegu, Korea). Material and methods. Thirty-five patients were rehabilitated with 150 CSM implants in this multicenter study. Results. The success rate was 96.2%. CSM Titanium fixtures can obtain slightly higher success rate when a cover screw was not used for implant installation than when used. However it doesn't show significant difference(p=.7615, Fisher's Exact test). Conclusion. This multicenter retrospective study demonstrated the efficacy of the CSM implant in the treatment of variety of clinical manifestation of tooth loss. And it can be assumed that whether a cover screw is used or not should no influence on the osseointegration.

Firing Test of KSR-III Rocket Propulsion System (KSR-III 로켓 추진기관 연소시험)

  • Kang Sun-Il;Kwon Oh-Sung;Lee Jung-Ho;Kim Young-Han;Ha Seong-Up;Cho Kwang-Rae
    • Journal of the Korea Institute of Military Science and Technology
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    • v.7 no.2 s.17
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    • pp.126-135
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    • 2004
  • The KSR-III rocket developed by KARI is the first rocket vehicle which is adopting the liquid propellant rocket engine system in Korea and its flight test was successfully done last year, KSR-III is a sounding rocket class launch vehicle, but there is a sense to accomplish design, manufacture, performance test and finally its flight test by domestic technology. In this paper, the authors are intended to introduce the multi-purpose test facility(PTA-II Test Facility) which is constructed for the variety of tests on KSR-III feeding system(single component tests, verification tests, cold flow tests and combustion tests) and its firing test results.

A theater construction of stage system and conversion system (공연장 무대부문의 구성요소와 사용실태에 관한 연구 - 무대장치의 구성과 전환 시스템에 관한 기초적 연구 -)

  • 김종성;임채진
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2001.05a
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    • pp.163-167
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    • 2001
  • Modem stag setting construction method is tend to deversity and difficult to take a regular form. Each production is consituted by interpretion of the producer. It has been reproducting a new work of production. The domestic of large stage system and play conditions other stage's variety structure or divert various of reality conversion that how to used to give attention to reality. We have a stage plan a part of stage domain and in consideration of conversion system through a play stage's plan construction and purpose basic data in other to supply.

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