• 소음진동
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• 제9권4호
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• pp.703-713
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• 1999

A side mirror is an important safety tool with which the driver can observe objects out of sight. This paper presents an organized design technology for the side mirror of improved vibration characteristics. Resonance response to forced vibration is critical to observability through the mirror to be designed. This study aims at the reduction of vibration level by the modification of mirror structures and consequent effects are predicted by computer simulations. We used a three-dimensional solid modeling and the modal and frequency analysis ; Pro/Engineer is used as a solid modeler; Pro/Mechanica for vibration analysis. The simulation results are compared with those obtained in experiemnts to check the validity by the three-dimensional modeling. The design technique of side mirror has been established and found to be effective in vibration analysis of redesigned parts.

• 기술사
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• 제16권1호
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• pp.48-54
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• 1983

Building management cost increases enormously as modern buildings become complicated. Lost of building eveners or managers feel the need to cut down the cost not sacrifying Comfort building environment and building safety, The ways to achieve such goal are maintaing with a few person, proper HVAC scheduling to save energy BAS's i.e the building automation system or building maintenance system, are designed to meet the goal. In korea, imported BAS's have been installed past several years. Difficulties arised in several aspects. One is extra high cost in installing BAS's because of marginal coat. Another is long settling time because it is originated from abroad. GSC/85/30 is the first trial as a korean BAS to minimize such difficulties. Even though it is a primitive system, it is a mileston of korean BAS the technics gained from developing GSCI/85/30 can be utilized to develop higher version and is now. As modern buildings become more complicated and hugy, managers owner of buildings seek for the system to manage building properly. BAS(Building Automation System or Building management system) is designed to meet the need.

• 기술사
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• 제16권1호
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• pp.13-19
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• 1983

As one of staff members participated in the full course of the plant construction project of On-san Refinery to its successful completion. I had my past expierence that the plant construction project was so complicated, and a Long period required, and thus there were so money problems to be solved. Among the problem, I mainly noticed that the following listed points were solved and improved. 1. Each drawing should be in every accuracy possible. 2. Contract should be specified in every detail possible. 3. All invoiced prices of breack down list should be coped with the current market prices. 4. All execution of work should be in the most accuracy. A. Planing execution of work. B. Coordination with supervisor group. C. Economical method for execution of work. D. Safety control. 3, Calculation work field should be established seperately 6. Each staff members should be work at the best of his pride.

• 기술사
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• 제44권2호
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• pp.46-50
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• 2011

Wind energy, as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, and produces no greenhouse gas emissions during operation. However, the construction of wind farms is not universally welcomed because of their visual impact, competing land use, comprising human health impacts, building and crop damage, loss of amenities and ecological impact, impact on wildlife, danger to birds, safety hazard, aesthetics and noise. Offshore wind power, in particular, offers a huge potential to generate clean energy. However, the envisaged massive expansion of wind farms in oceans is already causing severe environmental conflicts. Wind farms cause further harm to already threatened oceans. Wind power has negligible fuel costs, but a high capital cost. The expansion of climate-friendly wind energy use both onshore and offshore can only be successful it the legal and organizational conditions undergo some clear improvements.

• 조명전기설비학회논문지
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• 제23권8호
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• pp.99-103
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• 2009

본 논문에서는 부하설비의 정전 시간을 최소화하기 위한 전력량계 무정전 교체 장치를 고안하여 개발하였다. 개발된 교체 장치는 전력량계 교체 시 정전을 피하기 위해 시행되고 있는 단순 우회회로 결선방법, UPS 사용법 등, 다른 방법들에 비해 간편하여 효율성을 증대하였다. 그리고 교체 작업동안 안전성을 확보하기 위하여 보호 요소들을 구성함으로써 신뢰성 또한 증대하였다. 본 장치의 적용으로 고객에게 정전 시간을 단축하여 신뢰성 있는 전력공급을 보장할 수 있게 되었다.

• 기술사
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• 제30권3호
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• pp.104-114
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• 1997

Throughout the practical process engineering design and commissioning 8E startup experiences focused on chemical process safety, the review of design and installation of the thermal relief valve with its surrounding facility in a chemical plant piping system is made to help the better understanding of the piping system of characteristics of thermal relief valve which Is consisting of theoretical approach, correlation in terms of temperature and pressure increase caused by external heat supply in a piping system, consideration of thermal relief valve design, pressure relieving system of serial thermal relief valves and exception of their installation. It is earnestly recommended that following topic should be implemented during thermal relief valve design, installation and normal operation as well.

• 기술사
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• 제34권2호
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• pp.37-41
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• 2001

In recent days, welding technology developed in various field of industry, a ship, a building, a structure, a high pressure vessel ect. A welding structure should be base on a safety Welding engineers and welding technicians have a problem in acquiring welding technology, because young people avoid state of the art, beginning their careers In this field. The optimum welding state depends upon the most welding condition, mechanical properties of the base metal, welding processes and arc stability. Base on these fact, the suitable parameters of welding condition can be found through various welding experiments. Therefore, it Is very Important for welding professional engineers to take an active role In advancing new welding technology

• 기술사
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• 제41권5호
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• pp.41-44
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• 2008

해상을 운항하는 선박들은 충돌, 좌초, 침몰, 전복 및 조난 등의 위험에 노출되어 있으므로항행 중에 발생할 수 있는 여러 가지 해양사고의 요인을 살펴보고 방지 대책을 생각해 보았다. 일단 해상에서 사고가 발생할 경우 신속하고 효율적인 구조를 위해 유관기관 사이에 일원화된 지휘체계가 필요하다. 또한 해양사고의예방을 위해서는 선원들에 대한 안전교육을 강화하고 안전한 항행을 위한 항행여건을 개선하는 것이 중요하다.

• 기술사
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• 제45권4호
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• pp.62-66
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• 2012

농업기반시설인 저수지의 효율적 관리를 위하여는 관리주체의 일원화, 전문가 집단에 의한 과학적 관리를 위한 인력양성 및 배치를 통한 선량한 관리체계 확립이 필요하고, 정기적 정밀안전 진단 결과에 의한 보수보강이 이루어지도록 관리체계의 시스템화가 요망된다. 특히 정기적인 정밀점검 및 정밀안전진단을 실시하여 시설물의 기능성, 안전성 등을 점검 또는 진단하고 그 결과에 따라 변화된 자연환경에 걸맞는 시설기준을 충족시킬 수 있는 적절한 보수 보강방안을 실시하도록 지속적인 예산지원은 물론 관리주체의 선량한 관리의식이 요망된다.

• KIEAE Journal
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• 제10권4호
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• pp.29-37
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• 2010

The industrialized countries have promoted the rehabilitation of existing housing units as a national agenda, such as green policies, whereas korea, although having a housing stock as huge as that of world countries, have focused on the growth of housing by constructing new units rather than rehabilitating existing ones. Today, it has been so long since many multiple dwellings in Seoul and in the vicinity of Seoul were constructed. There were, however, very few political efforts to encourage the rehabilitation of housing. Today, substantial time has passed since multiple dwellings in Seoul and the first-stage new cities such as Bundang and Ilsan were constructed. What is required to maintain the quality of the existing housing and use it with safety is to promote the engineer of maintenance for multiple dwellings to work the maintenance of existing multiple dwellings. The objective of this study is to compare and analyze the maintenance qualification system of multiple dwellings of Japan, and then to propose to raise engineers of maintenance for multiple dwellings in korea.