• Journal of Welding and Joining
• /
• v.13 no.2
• /
• pp.32-41
• /
• 1995

본 고에서는 경년열화의 종류, 열화의 판정방법 등에 관한 일반사항과 열화 및 수명예측 문 제를 해결하기 위한 문제점등을 기술하였고, 그 동안 연구되어진 열화 현상에 의한 재료강도의 저하현상을 설명하였다. 또한 열화현상은 비파괴 판정만으로 수명예측이 어려우므로 시간에 따라 진행하는 열화의 진행곡선이 반드시 필요할 것이다. 이와 같이 열화진행 정도를 추정하기 위해 열화재의 가속제작 방법과 레이저 빔의 고온의 열원을 이용한 열화 치료 가능성을 제시 하였다. 아울러 열화치료에 대해 정도높은 방법에 제시된다면 기존 기계구조물을 안전하고, 지속적으로 사용하여 경제적인 손실을 줄일 수 있을 것으로 기대한다.

• Convergence Security Journal
• /
• v.1 no.1
• /
• pp.83-99
• /
• 2001

인터넷이 발전해감에 따라 사이버 세계라고 하는 대규모 네트워크 환경이라는 또 다른 세상이 창출되었다. 그러나 대규모 네트워크 환경하에서는 정보보호의 취약성 때문에 인터넷 서비스를 이용하는 네티즌들의 안전성이 보장되지 않는다. 이처럼 불법 침입자들로부터 선의의 이용자를 보호하기 위해서는 그들이 해킹 기법과 그 대응책을 숙지해야 할 것이다. 이 논문에서는 대규모 네트워크 환경하에서 발생되고 있는 해킹에 대하여 분석하고 그에 대한 대책을 제시하는데 그 목적이 있다.

• Journal of environmental and Sanitary engineering
• /
• v.10 no.3
• /
• pp.124-130
• /
• 1995

Air pollution problem by air craft was reviewed from emission gas components from air craft and pollutants amount generated in airport with the compareness of domestic transportation data by airplane and foreign data. It is reported that concentration of emission gas from air craft is lower than that of pollutants from automobile and factory. But transportation frequency is increasing rapidly in Korea. It is recommended that concerns should be taken on long- term of counterplan device about it.

• Journal of the Korean Society of Safety
• /
• v.17 no.3
• /
• pp.96-101
• /
• 2002

The object of risk assesment is to prevent the accident from arising. The main reason for risk assesment of construction work is to determine priority order of improvement plan about risky work. Formwork is a complicated process that determines the total duration of apartment construction, and occupies 10∼15% of total construction expense, and 17% of serious accidents occur during formwork. So, formwork occupies very importment roles in work sites, economical efficiency and safety. We need to identify the work type with a high risk of accidents, and to establish suitable safety counterplan and implement intensive safety management.

• Proceedings of the KWS Conference
• /
• 2006.10a
• /
• pp.274-276
• /
• 2006

This study was researched by measuring the amount how much a welder inhaled the major harmful metals such as Fe, Mn, Cu, Zn and so on which occurred at the welding site during welding work and also by measuring the heavy metal concentration in a welder's blood after the welding. By using the mobile fan, the measure of welding fume and the result were taken.

• Journal of KSNVE
• /
• v.3 no.1
• /
• pp.47-55
• /
• 1993

In order to maintain comfortable life environment around railroad site, noise from train itself, and to train & rail interaction, and the vibration transmitted through the ground should be controlled to the extent of permissible level. In order to achieve this, the basic railroad noise & vibration data such as magnitude and frequency characteristics of them are necessary to establish the counterplan for railroad noise & vibration. In this study, we measured and analysed the characteristics of time variation, frequency, direction and distance attenuation of noise and vibration of the railroad between Seoul and Pusan.

• Magazine of the Korea Concrete Institute
• /
• v.14 no.3
• /
• pp.64-70
• /
• 2002

도시 주민생활에 없어서는 안될 주요한 사회간접자본시설로서 하수도, 하수도처리시설 등의 콘크리트 구조물에 대한 부식열화는 현재 세계 각국에서 급속히 진행되고 있다. 콘크리트 구조물이 반영구적이라는 것으로 인식되어 있으나, 실제로는 사용수명이 급속히 단축되어, 특히 콘크리트가 처해있는 환경 중에 황화수소(H$_2$S) 등의 황산화합물이 다량으로 존재하고 있는 환경에서는 하수관 콘크리트의 부식에 의해 도로가 함몰되는 사례도 보도되는 등 시민생활에 큰 위험성을 동반하는 가능성을 배제할 수 없다.(중략)

• Proceedings of the Korean Geotechical Society Conference
• /
• 2001.03a
• /
• pp.183-190
• /
• 2001

There are complicated and big shear zone which is about several tens meter in the middle of the cutting slope in this study area. And slope stability analysis is very hard because many fault zones are gathered in the shear zone. This study furnish imformations of scrutinized geological survey, numerical stability analysis, reinforcement work analysis and computation of ground mass properties. Then this offer rational slope stability analysis, rock mass decision and counterplan.

• International Commerce and Information Review
• /
• v.10 no.3
• /
• pp.391-406
• /
• 2008

Recently, U.S. beef completely is opened and a point of present time, beef import market is increased, the high branding and high quality of Korea's beef cattle is urgent for a brand-name of Korea's Meat got competitive superiority in world market. Also, for that situation, Producers and Distributors request successful marketing strategy establishment and in the concrete, I present a counterplan strategy based on 4P(price, product differentiation, sales promotion, distribution) strategy.

• Korean Security Journal
• /
• no.3
• /
• pp.385-405
• /
• 2000

In the Present thesis, at temps were to study with the study on the terror with laser weapons. Chapter I which sets out purpose, scope and method. Chapter II concerns the general definition of laser weapons. Chapter III explain at length overview about development of laser weapons. Chapter IV suggest the terror with laser weapons and the counterplan against it. It is followed by concluding observation made in chapter V. To we operated security systems effectively, these need to be regulated according to a security measures organizations, laser facilities and equipments, laser plan and protective force, laser operations and so forth.