• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.188-190
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• 1999

현재 지하주차공간의 자연환기방식에 대한 우리나라 건축법규의 기준은 150m$^2$ 이내마다 1개소이상의 외기와 면하는 2m$^2$이상의 개구부를 천창 혹은 Dry Area를 설치하도록 규정하고 있다. 이 지하공간에서의 자연환기는 풍력, 온도차, 차량출입구에 의한 환기를 들 수 있으나 주로 풍력에 의한 환기가 대부분을 차지한다.(중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.219-221
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• 1999

환경에 존재하는 세균, 진균, 바이러스 등 다양한 미생물들은 사람의 건강과 밀접한 관계를 갖고 있다. 이들은 다른 생물학적 오염원인 동물의 분미물, 꽃가루 및 절족동물 등과 함께 실내로 유입되어 건조한 환경에서 공기중에 비산 될 수 있다. 또한 에어콘, 히터, 습기공급장치 등에 의해 조성된 적절한 환경에서 번식된 후 실내에 분산된 병원 미생물들의 직접 감염에 의해 알러지 등 호흡기 질환과 병원성 질환을 유발한다.(중략)

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.339-345
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• 2004

In this study we reported the Smoke Density values of interior materials of railroad passenger car and investigated the specific smoke density(Ds) by NBS smoke chamber to the variance of some test conditions. First we compared the result of Ds from ISO 5659-2 with that from ASTM E 662 for same material. Secondary studied the Ds value to the variance of specimen shape and thickness and to the variance of other conditions.

• Proceedings of the Korean Vacuum Society Conference
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• 2009.02a
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• pp.212.2-212.2
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• 2009

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.525-528
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• 2006

This study performed an experimental test to derive the characteristics of compressive strength, het of hydration and creep of roller compacted concrete. The main variable of strength test are cement content and fly ash content. The heat of hydration test was performed using MARUTO CH-50-CA and dreep test was carried out according to KS F 2453.

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.373-374
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• 2009

Three autogenous expansion model of MgO concrete are investigated in order to access their suitability in stress analysis which consider temperature and volume change due to hydration of cement and temperature dependent expansion of MgO.

• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.709-710
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• 2000

Genosensor technology utilizes a patterned array of DNA molecules immobilized on solid supports for biomedical analysis. The detection capability of the sensor depended mainly on the way the capture probes are attached to the support as well as the sequence. We compared two different. coupling methods currently used to covalently graft DNA molecules onto a glass surface.

• Proceedings of the Korea Concrete Institute Conference
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• 2003.11a
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• pp.289-292
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• 2003

CFRD face slab concrete has a much capability to occur crack due to drying shrinkage and vibrator compaction etc. Because crack of concrete induces structural problem and decrease durability of concrete, it is need to reduce crack of concrete. In the experimental study it was analyzed that the effect of curing of concrete and compaction on CFRD face slab concrete. As a results, it was found that control of construction condition into curing of concrete and compaction improved on construction efficiency of face slab concrete.

• Proceedings of the Korea Concrete Institute Conference
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• 2003.11a
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• pp.537-540
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• 2003

The effects of substituting cement with fly ash(10%, 15%, 20%) and different fiber addition(polypropylene, cellulose, poly vinyl alcohol), on the control of microcrack and enhanced durability performance of face slab concrete in CFRD was studied experimentally It was conducted experiments of plastic shrinkage of mortar and concrete, and drying shrinkage of concrete. Also, durability test were carried out the chloride permeability, abrasion resistance and freeze-thaw repetition. Through the experimental results, it was concluded that ploy vinyl alcohol fiber containing concrete was the most effective mixture in control of cracking and durability.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.187-191
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• 2001

Diesel locomotive engine is the main source of train noise in these days but hard to reduce the level by barrier for it emitted from high location. For the passing high level noise properties of diesel locomotive engine, there are needs of changing the environmental railway limit to maximum level from equivalent. In this study we investigate the noise characteristics of the diesel electric locomotive according to the change of notch. From the result we found out the frequency of engine cycle noise and the shape of noise spectrum.