• 한국산림과학회지
• /
• 제66권1호
• /
• pp.8-15
• /
• 1984

인구(人口)의 도시집중(都市集中)에 의(依)해 급격히 증가(增加)하고 있는 아파트단지(團地)의 조경수목(造景樹木)에 대(對)한 관리(管理)는 쾌적(快適)한 주거환경(住居環境)의 제공(提供)이라는 면(面)에서 중요(重要)한 의미(意味)를 지니고 있다. 주거환경(住居環境)의 질(質)을 높이는 데 중요(重要)한 역할(役割)을 담당하고 있는 조경수목(造景樹木)은 그동안 관리부실(管理不實)로 인(因)해 생육(生育)이 불량(不良)하고, 높은 하자율(瑕疵率)을 나타내었다. 이러한 현실(現實)에 대(對)한 개선방법(改善方法)으로는 식재공사(植栽工事)의 하자발생(瑕疵發生)을 최소(最少)로 하기 위한 시공기술(施工技術)의 향상(向上)과 이론적(理論的) 연구(硏究)가 필요(必要)하며, 조경부문관리인(造景尃門管理人)을 두어 관리기능(管理機能)을 강화(强化)함과 동시(同時)에 제도상(制度上) 적정수준(適正水準)의 관리비(管理費) 항목(項目)이 설정(設定)되어야 하며, 높은 주민(住民)의 관리의식(管理意識)을 바탕으로 관리(管理)에 대한 자발적(自發的)인 참여(參與)를 유도(誘導)할 수 있는 분위기(雰圍氣)를 조성(造成)하는 것이라 하겠다.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 1999년도 토목섬유 학술발표회 논문집
• /
• pp.117-128
• /
• 1999

Geosynthetics have been studied especially Korean Railway earth works from the outset and have proved successful in both technical and economic terms. Hitherto Geosynthetics have been given consideration chiefly in dimensioning the requisite track subbase thickness, but have not been considered when calculating the thickness of the frost protection layer. this often made it impossible to reduce the thickness of the subbase. The article therefore puts forward a proposal for considering the German Geosynthetics in dimensioning the requisite thickness of the frost protection layer.

• 기술사
• /
• 제42권1호
• /
• pp.44-48
• /
• 2009

About past 30 years, we don't have enough consideration and investigation about DB-Load. While 30 years, weight of truck is heavier and condition of roads differ, so many conditions of roads and vehicles are changed. We must consider change of many conditions and we must improve laws about maintenance of DB-Load. and now we must consider that low grade as well as high grade bridge can cross heavy vehicle and harmony between changed size of vehicle and bridge while making laws and code. So we can apply to improve design properly.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2010년도 춘계 학술논문 발표대회 1부
• /
• pp.235-236
• /
• 2010

Since many structures in the sea environment are damaged by chloride, appropriate repair strategy is required. Therefore in the paper, optimum period for the RC structure's repair is calculated with consideration of economic efficiency. Moreover, when the concrete members are repaired with the other material such as polymer mortar forr section restoration, their expected service life also calculated to predict more accurate repair period during the life span.

• 대한전기학회논문지:전기물성ㆍ응용부문C
• /
• 제54권5호
• /
• pp.224-226
• /
• 2005

In this paper, the secular changes of buried grounding electrodes was investigated; the electrodes are such facilities as grounding grid, grounding connector, grounding terminal and grounding rod etc.. The corrosiveness of removed substation grounding electrodes after commercial operation more than 50 years was measured and its conductivity deterioration trend was analyzed. The measuring results using three experimental methods were compared, finally the consideration for safe and economic grounding design were shown. As the result, it shows the maintenance necessity of grounding systems.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
• /
• pp.338-342
• /
• 1988

Recently, in sequence control systems, high flexibility and maintenance of control software are required. This is because product life cycles become shorter and control specification must be changed frequently. The authors extend the concept of Safe Petri Net to develop the design and analysis tool for sequence control systems taking the safeness and notation of input/output functions into consideration. Extended Safe Petri Net (S-Net) is proposed as such a new graph model and real time scanning algorithm based on S-Net is developed.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2015년도 제46회 하계학술대회
• /
• pp.471-472
• /
• 2015

This paper proposes a generator maintenance scheduling (GMS) problem with due consideration of various objective functions. The objectives include leveling the reserve rate, maximizing reliability and minimizing production cost. The practicality and effectiveness of the proposed approach are demonstrated in the simulation for a real-size power system model in South Korea.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2004년도 추계학술대회 논문집
• /
• pp.1113-1118
• /
• 2004

Ballasted track is constructed in consideration of the maintenance. The application time and frequency of MTT(Multiple Tie Tamper) and BS(Ballast Cleaner) depend on track geometry measurements. This paper presents the application of Ground Penetrating Radar(GPR), Falling Weight Deflectometer(FWD), and Portable Ballast Sampler (PBS) to evaluate the effects of track geometry due to substructure deterioration and to build a reliable substructure evaluation system.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2004년도 추계학술대회 논문집
• /
• pp.1419-1424
• /
• 2004

Railway safety is based on a risk analysis and safety assessment for the whole railway system as human, train, electric, signaling, operation, maintenance and etc. Therefore in this study, after investigating the accidents happened in electric railway on Choongang line for 5 years, from '97 to '01, a Data-Base was made through a cause and result analysis. In consideration of economic loss and human resources damage, a risk assessment for electric railway was also performed.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 1999년도 추계학술대회 논문집
• /
• pp.447-454
• /
• 1999

In this paper, a technique for the shape design and analysis of rail fastener is presented. KRRI's own 3 type fasteners are developed after due consideration for tile aspects of installation, maintenance, and cost of fastener. Numerical by using commercial FEM program COSMOS/Works are carried out to determine the optimal shape of fastener clip. Front tile manufactured models and numerical results, the developed fasteners show tile possibility to be commercialized. But in order to have their competitiveness on the markets, further studies are required for the demonstration of performance through laboratory and field tests