• Journal of Radiation Industry
• /
• v.4 no.4
• /
• pp.391-395
• /
• 2010

The characteristics for pollutant transport in tidal influenced area was investigated using tidal wave hydraulic scale model. Hydraulic scale model was composed of the tidal generator, attenuation area and channel. Also, wave height, current meter and conductivity meter were used with the measured instruments in hydraulic scale model. NaCl with a tracer was used to evaluate the advection phenomena under the different velocity profiles. The arrival time of the maximum concentration in the condition of the relatively fast velocity was measured about 30 seconds faster than ones in the conditions of low velocity. The measured concentrations of the tracer were shown in the detection points of the flow direction consecutively.

• Journal of the Korean Society of Industry Convergence
• /
• v.25 no.1
• /
• pp.101-110
• /
• 2022

For this purpose, the authors proposed and proved usefulness of the modified mean skin temperature which is integrated mean radiation temperature and the effect of floor contacted heat conduction. The mean radiation temperature is applied form factor between half cross-legged human body and surrounding wall of indoor. In addition the floor contacted heat conduction is applied heat transfer coefficient of half cross-legged human body. Eight Korean young men were targeted for the experiment. From the experiment the authors excerpted physiological reaction and psychological reaction in Ondol environment which is combined physiccal environmental factor of artificial climate chamber, air and floor temperature. As a result of the experiment it is confirmed that heat conduction has more impact than heat exchange from existing research for the heat exchange between half cross-legged human body and surrounding wall in Ondol thermal environment. Thereby, it is proved the effectiveness of the modified mean skin temperature which is added floor contacted temperature to the Ondol thermal environmental evaluation index.

• International conference on construction engineering and project management
• /
• 2007.03a
• /
• pp.759-768
• /
• 2007

Construction is one of the most hazardous industries due to its unique nature. Recent occurrences of highly publicised and criticized construction site accidents have highlighted the immediate need for the construction industry to address safety hazards. Safety used to be addressed as an isolated issue in the past, but the problem of safety is an emergent property of a system. In general, it seems that both industrial practitioners and government officials have tended to address safety by focusing on technical aspects and looking for immediate causes of accidents after they have taken place. The objective of this paper is to examine issues and critical factors that affect the safety standards from a holistic point of view. The job of making worksites safe should not just fall squarely on the contractors but should be shared by all parties in the value chain of construction activities.

• International conference on construction engineering and project management
• /
• 2022.06a
• /
• pp.678-685
• /
• 2022

Prefabrication is a construction technique that is increasingly being applied to different building components due to its many benefits, including higher quality and lower waste. Despite these advantages, there are challenges in execution of these components on projects, due to transportation logistics, skilled labor requirements, and project management techniques. This paper investigates the current landscape of prefabricated pipe spools and potential solutions for minimizing these challenges. The scope of this research includes a proposed workflow, to standardize implementation of these components. Semi-structured interviews were conducted with industry professionals to assess current industry practices and the validity of the proposed workflow. Findings of this paper indicate that greater integration between design, fabrication and transportation is required to minimize inefficiencies when implementing prefabricated pipe spools on projects.

• International conference on construction engineering and project management
• /
• 2013.01a
• /
• pp.209-212
• /
• 2013

Global warming and climate change is now an important issue in every industry. Construction is not an exception. Greenhouse Gases (GHG) are emitted by construction activities such as fuel usage in construction equipment and so on. In light of this, Intelligent Excavating System (IES), which is a robotic excavator with site modeling capability, is developed by a research consortium formed in Korea to improve productivity, quality, and safety of the traditional earthwork. This paper presents that energy saving effect of IES in comparison to traditional method. Through this review, we propose a research strategy to achieve carbon reduction goals in construction industry.

• 대한예방의학회:학술대회논문집
• /
• 1999.10a
• /
• pp.287-288
• /
• 1999

• 대한예방의학회:학술대회논문집
• /
• 1999.10a
• /
• pp.53-54
• /
• 1999

• Proceedings of the Korean Environmental Health Society Conference
• /
• 2003.06a
• /
• pp.111-115
• /
• 2003

Biosorption of lead by marine algae, Undaria pinnatifida, was examined. The biosorption capacity of lead by U. pinnatifida was above 30% of its own weight and proportional to the initial lead concentration. However, the opposite result was shown in different initial weight of biomass. The mechanism of biosorption was accorded to the ion exchange process.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2000.10b
• /
• pp.195-212
• /
• 2000

More and more people have suffered from the environmental pollution caused by the rapid development of our industry. They wat to be compensated for loss an furthermore hope to prevent their neighbor circumstances from being polluted. It's the reason why the environmental action occurred. Our team will clarify our environmental right, the process of environmental action and general problems of our current system. On the basis of them we will present several improvable methods.

• Toxicological Research
• /
• v.34 no.4
• /
• pp.371-371
• /
• 2018