• Journal of the Korean Recycled Construction Resources Institute
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• v.10 no.3
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• pp.307-313
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• 2022

In this study, the correlation between Half Cell Potential(HCP) and the corrosion influencing factors was analyzed with considering three levels of water-cement ratio, the concentration of chloride solution, and cover depth. As a result of long-term corrosion monitoring, HCP behavior was close to the critical corrosion potential(-350 mV) in all water-cement ratios in the case of 3.5 % and 7.0 % chloride concentration. Regarding the passed charge test in 548 curing days, the passed charge results were improved to 'Moderate' grade. Multiple regression analysis was performed to evaluate the correlation between corrosion influencing factors and HCP, and it was evaluated that the effects of influencing factors to HCP were in the order of chloride concentration, water-cement ratio, and cover depth. In the case of the relationship between HCP and the passed charge, the coefficient of determination showed a high level of 0.9, which yielded a close correlation between the passed charge and HCP.

• Journal of Advanced Navigation Technology
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• v.27 no.1
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• pp.57-62
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• 2023

This paper proposes a tri-band bandpass filter using dual-mode stepped-impedance resonators (SIRs) with parallel coupled structures. The proposed filter adopts U-shaped SIRs with open stubs and parallel coupled lines (PCLs) that have inter-digital and comb-line shorted ends. Two U-shaped SIRs with open stubs build the first and third passband, and the central PCL resonators build the second passband. Five resonators and coupling structures are theoretically analyzed to derive the scattering parameters of the proposed filter. A novel tri-band bandpass filter is designed and fabricated using the induced scattering parameters. The measured result of the fabricated tri-band bandpass filter shows a good agreement with the simulated one.

• Journal of Korea Entertainment Industry Association
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• v.13 no.2
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• pp.187-195
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• 2019

This study examined the perception of menstrual pain and dysmenorrhea through aromatherapy as a post - school program for high school girls. The after-school program proceeded for 2 hours per week for 10 weeks, of which aromatherapy was performed for 1 hour per body part. Thereafter, the participants were experimented to determine the pre - post - perception of the group of girls who did not perform aromatherapy as a control group and as a control group. Based on the results of this study, the following conclusions were obtained. First, aromatherapy was found to be a direct help to relieve menstrual pain in high school girls. Second, Aromatherapy was found to be able to help mental change in the menstrual cramps of high school girls. Third, Aromatherapy did not help the physical change of high school girls. In this regard, aromatherapy is a program that helps to relieve menstrual cramps in high school girls and can be considered a program that can be fully recommended for students with severe menstrual cramps.

• Plant Journal
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• v.18 no.4
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• pp.48-57
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• 2023

In this study, I discussed a way of the improved operation criteria to detect combustion instability in advance F-Class Gas Turbine, which adopts lean pre-mixed combustion system. The data of 16 blades path temperature thermocouple installed radially at the gas Turbine exit were collected to analyze the variation of individual blade path temperature. The cumulative variation in individual blade path temperature for one week under normal combustion conditions was confirmed to be up to 26℃. On the other hand, in the event of combustion instability, the symptoms of increased temperature variations in the individual thermocouple were mostly seen from a few days ago. Based on the results of this study, it is deemed appropriate to inspect and maintain in Ulsan Thermal Power Gas Turbine when the individual blade path temperature exceeds 50℃ of the cumulative variation for 10 days.

• Korean Journal of Culture and Social Issue
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• v.14 no.1_spc
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• pp.519-544
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• 2008

The purpose of this study is to propose what psychological education is needed for activation of interchange between the South Korea and the North Korea and ultimately for the completion of Korean unification. We learned this reason from the German unification case. The Germany was unified 17 years ago, but many researchers evaluate that it will take about 30 years more for German people to complete real and inner unification. So, we proposed our own unification education in a psychological aspect for faster and inner unification, which is based on the principle that we should go ahead according to our situation, not simply follow the way Germany went. Therefore, we should start psychological education for unification from now on, even though unification is not accomplished at the present and Germany didn't do that. Because we can predict the pre-unification (interchange) stage would be long unlike the Germany, psychological education for unification is needed during this interchange stage consistently. For the person-oriented unification education, we should educate adaptation-enhancement strategy for each person to keep psychological stability in the interchange and unification stage, beyond simply educating ideology focusing on the political and structural unification.

• 월간 기계설비
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• s.42
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• pp.35-41
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• 1994

국회는 지난 12월19일 본회의를 열고 $\ulcorner$건설업법 개정안$\lrcorner$과 $\ulcorner$주택건설촉진법 개정안$\lrcorner$, $\ulcorner$지역균형개발 및 지방중소기업육성에 관한 법률안$\lrcorner$을 통과시켰다. 본지에서는 이날 통과, 최종 확정된 건설관련볍률 개정$\cdot$제정된 주요내용을 요약 정리하여 게재한다.

• 주택과사람들
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• s.203
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• pp.102-103
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• 2007

지난 3월 2일, 알박기 방지 대책을 담은 택지개발촉진법 개정안이 건설교통위원회를 통과했다. 앞으로 개정안이 국회 본회의에서 의결되면 민간 택지 개발 사업도 상당히 빨라질 수 있다. 민간 택지 시행자가 개정안 통과 여부에 따라 입장이 어떻게 달라지는지 사례를 통해 검토해 보자.

• Explosives and Blasting
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• v.19 no.1
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• pp.19-30
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• 2001

본 논문에서는 수상구간의 우물통 기초 철거공법을 약액(팽탕성 과괴제) 주임공법에서 발파공법으로 변경하여 공사기간을 단축시키면서도 주변의 보안물건에 대한 공해를 발생시키지 않고 안전하게 공사하여 원가를 절감한 사례를 중심으로 발파공법을 고찰하였다.

• The Korean Journal of Applied Statistics
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• v.12 no.1
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• pp.1-15
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• 1999

수산물 비계통 생산량 조사는 수산물 생산량 조사 중 어가부분에서 비계통 출하된 양에 대한 표본조사이다. 본연구는 1995년 어업 총조사 자료에 근거하여 새로운 표본 설계를 제안하는 것을 목적으로 한다. 표본은 층화 2단 집락 추출방식에 의해 추출되었으며 층화변수로는 어업조사구 내의 일반어류 어가 비율을 사용하였다.

• 프린팅코리아
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• v.14 no.6
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• pp.50-51
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• 2014

최재천 국회의원이 발의하고 국회 교육문화체육관광위원회가 수정한 도서정가제 관련 '출판문화산업 진흥법 일부개정법률안(수정안)'이 지난 4월 29일 열린 국회 본회의에서 통과됐다. 본 개정안은 5월 중 개정법률이 공포되고, 6개월 경과 후인 11월부터 시행될 예정이다.