• 한국건축시공학회지
• /
• 제14권4호
• /
• pp.314-321
• /
• 2014

특수 플랜트 건설은 타 건설사업보다 체계적인 원가 및 공정관리가 요구되지만 이를 위하 반드시 필요한 현장 생산성을 구체적으로 분석한 연구는 이루어지지 않고 있다. 본 연구에서는 국내에서 건설중인 특수 플랜트 현장의 철근콘크리트공종을 형틀, 철근, 콘크리트로 나누어 생산성을 측정하고 생산성에 영향을 미치는 요인을 분석하였다. 생산성 측정결과 형틀공종 $0.54(m^2/man{\cdot}time)$, 철근공종 $0.06(ton/man{\cdot}day)$, 콘크리트공종 $1.98(m^3/man{\cdot}time)$로 나타났다. 영향요인으로는 형틀공종은 요일과 야간적업 유무, 철근공종은 야간잡업 유무, 콘크리트공종은 야간작업 유무와 콘크리트 물량이 통계적으로 유의게 영향을 미치는 것으로 분석되었다.

• KIEAE Journal
• /
• 제16권3호
• /
• pp.137-143
• /
• 2016

Purpose: Apartment housing should conduct a cyclic repair to keep and maintain the building performance since they are constructed. Therefore, the repair plan would be provided for long term period which explains the repair time, items and repair cost. Residents of apartment housing are responsible to pay for the repair activities. For repair cost, residents would reserve the money for repair little by little continuously until the required repair time because the repair cost takes a big burden for residents and lots of money a time. But, there is no systematic approach to provide the long term repair cost because it is no proper forecast of the repair cost to the upcoming repair time. In this study, it aimed at providing the monthly accumulation of the long term repair cost with the survey data in Seoul. Method: For these, the surveyed data are classified into 6 categories and number of data are 1,918. In addition, it developed the repair cost model for the 24 repair works and the cumulation function which is reflected with the each cost model. Result: This study are shown as follows : First, among the various estimation for the repair cost, the power function has a goodness of fit in statistics. Second, the monthly accumulation would be 12,840 won/household in size of $100,000m^2$ management area and $81.7won/m^2$ in size of the 1,000 household number during 40 years.

• 한국응용과학기술학회지
• /
• 제39권2호
• /
• pp.314-323
• /
• 2022

본 연구는 2018년 10월 10일~13일까지 G시 간호대학 2, 3학년을 대상으로 식행동에 영향을 미치는 요인을 파악하기 위한 서술적 조사연구이다. 연구결과, 식행동은 대상자의 용돈 중 식비(F=5.83, p=.003), 식생활 패턴(t.14, p<.001), 편식 정도(F=9.27, p<.001)에 따라 유의한 차이가 있었다. 변수 간의 상관관계는 식행동은 생활 스트레스(r=-.16, p=.001) 및 식습관(r=.50, p<.001)과 유의한 상관관계가 있었다. 식행동에 영향을 미치는 요인으로는 식습관(𝛽=.42, p<.001), 용돈 중 식비(𝛽=-.14, p=.007), 편식상태(𝛽=-.14, p=.007), 생활 스트레스(𝛽=-.13, p=.010) 순으로 나타났으며 설명력은 30.6%로 식행동 모형은 유의하였다(F=26.63, p<.001). 본 연구결과를 토대로 건강한 식생활 실천할 수 있는 방법을 모색할 필요가 있으리라 사료된다.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2016년도 추계학술대회
• /
• pp.665-667
• /
• 2016

최근 화석연료의 고갈 및 환경문제로 인해 신재생 에너지에 대한 관심이 해마다 증가하고 있다. 신재생에너지는 깨끗하고 재사용이 가능한 에너지원으로 풍력과 태양광을 이용한 방법이 대표적이다. 이들 중 풍력 발전시스템은 자연의 바람을 이용하여 바람의 운동에너지를 전기에너지로 변환하는 방식이다. 기존에는 풍력 발전시스템을 구현하여 풍동실험을 하기 위해 실제 풍력과 유사한 환경을 구성하여 풍동실험을 하였다. 하지만, 이러한 풍동실험을 구성하기에는 비용이 커지는 문제가 발생한다. 본 논문에서는 이러한 풍동실험을 모터와 발전기를 이용한 테스트 베드를 구성하여 실험할 때 실제 풍동실험에서 발전기의 특성을 고려하여 모터를 제어함으로서 풍동실험과 유사한 결과를 얻고자한다.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2005년도 춘계학술대회 논문집
• /
• pp.1311-1314
• /
• 2005

Recently drum washing machines are required to improve not only functions, but also endurance security. The spider is one of the major parts in a drum washing machine as a power transmission device. It is needed estimating for fatigue life because it rotates at high velocity when the drum washing machine works. In this study, we tried to estimate fatigue life of the Spider with CAE and verified the accuracy by comparing the CAE results with the experimental results. The estimation method of fatigue life for the spider with CAE will be applied to raise the efficiency of time and money in the design process of a new drum washing machine.

• 동력기계공학회지
• /
• 제11권4호
• /
• pp.38-43
• /
• 2007

Pulsation is an inherent phenomenon in reciprocating compressors. It interacts with piping to cause vibrations and performance problems. Indiscriminately connecting to a compressor can be dangerous and cost money in the form of broken equipment and piping, poor performance, inaccurate metering, unwanted vibration, and sometimes noise. Piping connected to a compressor can materially affect the performance and response. To minimize these detrimental effects, reciprocating compressor system should be equipped by pulsation suppression system. The system usually comprises bottle volume, called snubber. Snubber is one of the most important parts in hydrogen compressing system. It has installed reciprocating hydrogen compressor. One of these components is snubber which has function to reduce pulsation waveform and to remove the impurities in the hydrogen gas. A snubber has an inclined plate as a buffer, which is installed inside snubber. When the pressure loss and the pulsation of pressure within a snubber is minimized, the snubber could get more applicability. Therefore, a study to find an optimum geometric size on a several snubbers which have different buffer width, has been conducted using a numerical analysis.

• 한국인터넷방송통신학회논문지
• /
• 제12권1호
• /
• pp.173-179
• /
• 2012

본 연구에서는 국내 T-DMB 시스템에서 대역통과필터 기능을 수행 하는 cavity 필터를 설계하고자 HFSS 툴을 사용하여 그 특성을 시뮬레이션 하였으며, 이를 활용하여 필터를 제작하여 측정한 특성을 시뮬레이션 결과와 비교하였다. 전자계 3D 시뮬레이션 Tool인 HFSS를 사용하여 cavity 필터를 시뮬레이션 하는 것은, 실제로 필터를 제작하기 전에 성능을 미리 점검함으로서 최적화된 모델을 구축하여 시간과 비용을 최대한 절약할 수 있도록 하는 것이다. 원통형 도파관의 특성을 파악하여 필터의 최적의 조건들을 얻도록 연구하였으며, 이를 바탕으로 HFSS 시뮬레이션 및 제작을 하여 특성을 측정하여 설계값과 비교하였다.

• 산업경영시스템학회지
• /
• 제19권40호
• /
• pp.351-360
• /
• 1996

Korean construction companies are now in very difficult situation due to the recent construction accident, opening of domestic market, the advent of boundless competition period in WTO, etc .Introduction of quality management system is quite urgent in order to strengthen our international competitiveness through the superiority of quality and foster the long term growth of organization. Substantially, many companies are proceeding with or completed the introduction of quality management system but small and medium sized construction companies have difficulties due to lack of money and man power. In this paper, five stage procedures, which can be efficiently applied to introduction and operation of qualify management system, have been suggested to help the minor construction companies which want to adopt the quality management system. This study is considered to be helpful for the companies which will introduce quality management system.

• 한국주거학회논문집
• /
• 제16권5호
• /
• pp.99-106
• /
• 2005

According the high growth of Korean economy, there are many changes in our life recently. As life quality is improved, the standard of construction is strengthen and subdivision. However, in many steps through which it passes until a building is planned, designed, constructed and completed, there are lots of problems among the law related architecture. Especially, there are many statutes which must be checked related to building permits and much wastes time and money in review because of overlapping laws related architecture. Furthermore, there are limitation of computerization and shortage of human power of administration in architecture. In this study, we propose six improvement programme of administration service in architecture. Through these program, civil applications like housing and economic condition could be improved consistently.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1998년도 하계학술대회 논문집 D
• /
• pp.1525-1527
• /
• 1998

The line-fuse which one of device most widely used in distributed line system has a ability to cut off the fault current flow into the house. But this device can be used only one time. So there are many waste of human power and money to exchange acted line-fuse. In this paper, we designed new type of line-fuse melting zone using by different union metal, so line-fuse can be reused after once operated.