• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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• pp.100-101
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• 2014

The global warming because of the CO₂ emission and solution about this emerge as the international enviroment problem. Particularly, it is the absolutely it is needed for reducing the CO₂ in the cement industry and harmful material actual condition. And the construction of home and abroad and material manufacturers tries for the technology development for the carbon dioxide and harmful material reduction which the portland cement in manufacture is usually emitted along with the increase of concerns about the environment-friendly concrete and panel. Therefore, in this research, the compressive strength of the inorganic binder and flexural strength tries to be measured in order to draw the inappropriate high temperature cure time of the ternary system inorganic binder using the blast furnace slag, red mud, silica fumewhich is the industrial byproduct with the cement substitute material, and etc.

• 열처리공학회지
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• 제28권5호
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• pp.250-257
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• 2015

As recognized by all scientific and industrial groups, carbon dioxide ($CO_2$) capture and sequestration (CCS) could play an important role in reducing greenhouse gas emissions. This paper is aimed at identifying evolving technological trends from the objective information of patents related to carbon capture technology by solvent. In this study the patents applied in korea, japan, china, canada, US, EU from 1993 to 2013 were analyzed. The result of patent analysis could be used for R&D and policy making of domestic CCS industry.

• 한국표면공학회지
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• 제50권4호
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• pp.296-300
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• 2017

NiO nanofibers with Au nanoparticles were synthesized by sol-gel and electrospinning techniques, in which the reduction process by ultraviolet exposure is included for the growth of Au nanoparticles in the electrospinning solution. FE-SEM(Field Emission Scanning Electron Microscopy), TEM(Transmission Electron Microscopy) revealed that the synthesized nanofibers had the diameter of approximately 200 nm. X-ray diffraction showed the successful formation of Au-decorated NiO nanofibers. Gas sensing tests of Au-decorated NiO nanofibers were performed using reducing gases of CO, and $C_6H_6$, $C_7H_8$, $C_2H_5OH$. Compared to as-synthesized NiO nanofibers, the response of Au-loaded NiO nanofibers to CO gas was found to be about 3.4 times increased. On the other hand, the response increases were only 1.1-1.3 times for $C_6H_6$, $C_7H_8$, and $C_2H_5OH$.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.132-133
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• 2016

The Present that environmentally friendly policies at issue in the world recently, construction sector and other sectors are working on reducing CO₂. Cement production during in the construction sector, CO₂ is being caused in large quantities. Therefore, this study was secure the basic date that not use cement and use blast furnace slag and fly ash HFA, polysilicon in industrial byproducts about cement non-cement matrix.

• Journal of Electrical Engineering and Technology
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• 제3권2호
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• pp.184-191
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• 2008

Electrical endurance is the critical characteristic of Magnetic contactors(MCs), which are widely used in such power equipment as elevators, cranes, and factory control rooms in order to close and open control circuits. Testing time, however, is not short in typical cases in which some method of reducing the testing period is required. This study shows the method of determining the stress level of electrical ALT(Accelerated Life Test) through optical temperature sensor and the relationship between 0.05 s and 0.1 s for on-time. The tool used for analyzing the test result is MINITAB. I will propose the method of determining the optimized stress level through optical temperature sensor, which will contribute to minimize the testing time and development period and also raise the product reliability.

• 한국안전학회지
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• 제17권4호
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• pp.119-125
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• 2002

The concept of dwelling space is tend to be changed not only to have reasonable mobility but also to have high quality of indoor air with psychologicaa satisfaction and comfortable. Moreover, recent constructed buildings have a big problem because of exhausted pollution gas and particles from building materials. More serious problem occurs from its high air tightness reducing the ventilation for saving the energy and superior adiabatic insulators to have high heat efficiency. Indoor air quality in super high-rise dwelling house was investigated by measuring pollutants such as $CO_2,=;CO,\;MO_2,\;R_n,\;TSP,\;PM_{10}$, HCHO, Offensive ordor. Subjective evaluation of residential environment is processed for the inhabitants who live in research space by testing environmental load in accordance with environment morphology, exterior environmental factor and post occupancy correlation and influence of attention.

• 한국군사과학기술학회지
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• 제27권2호
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• pp.140-146
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• 2024

Active electronically scanning antennas are faster and more flexible in beam-scheduling than mechanical antennas. Thus, they require an advanced resource management or detection methods to operate efficiently. In a surveillance radar performing periodic detection, alert-confirm detection is an excellent method to improve the cumulative detection probability by reducing the period while maintaining the detection probability. This paper proposes a design method for alert-confirm detection based on the parameters of the conventional design. We developed a simulator based on simulink@matworks and verified the result through Monte Carlo simulation.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1406-1409
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• 2003

There is a great demand for reducing the amount of material used in mass-produced plastics parts, for material cost constitutes a large percentage of the total cost of 60%. It may be noted that the price of plastics is directly rotated to the price of petroleum. Material reduction therefore decreases the amount of oil needed for the manufacture of plastics and thus help conserve this natural resource. Therefore microcellular foaming process(MCPs) was studied for solving this problems alternatively in 1980's at M.I.T Until now in MCPs carbon dioxide gas was mainly used for microcellular foaming. Besides, Talc was used for reducing the price of plastics. Consequently, we must certificate using the Talc in MCPs according to contents of the Talc.

• 한국환경농학회지
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• 제24권3호
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• pp.210-214
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• 2005

To reduce effectively cadmium (Cd) phytoavailability by phosphate in mine tailing affected soil, fused and super phosphate (FSP), a main phosphate fertilizer in South Korea, was selected as phosphate source and then applied at the rates of 0, 78, 390, and 780 $P_2O_5kg\;ha^{-1}$. FSP did not decrease Cd extractability and radish Cd uptake, but increased significantly. The effect of Cd supplement and soil negativity increase through FSP application was not significant. Soil pH decreased markedly with increasing FSP application, which increased significantly soil Cd extractability and radish Cd uptake. As a result, phosphate fertilizer for reducing Cd phtyoavailability in heavy metals contaminated soil should be carefully selected as alkaline type.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 추계학술대회
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• pp.621-622
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• 2017

본 논문에서 배열 안테나 기반 협대역 간섭신호 제거를 위한 저면적 FFT 프로세서 구조를 제안하고 5채널 64/128/512-point FFT 프로세서를 하드웨어로 구현 및 검증하였다. 제안된 flexible-Multipah Delay Commutator(MDC) 방식을 이용하여 5채널 입력 데이터를 하나의 FFT 프로세서로 처리했으며, 제안된 Mixed Radic-4/2/4/2/4/2 분해 방법을 통해 복잡도 측면에서 가장 큰 비중을 차지하는 비단순 승산의 수를 줄임으로써 복잡도를 크게 낮추었다. 제안된 FFT 프로세서는 Xilinx system generator로 설계한 후, Xilinx Virtex-7 FPGA에 기반하여 구현하였다. 구현 결과 slices 17508개, DSP48s(dedicated multiplier) 108개로 구현 가능함을 확인하였다.