의정활동을 통해서본 공공성확보방안과 정치인자세

이재준 한국공공사회학회 2012 공공사회연구 Vol.2 No.2

각종 수문기상인자의 경년별 특성변화 분석 2 : 변동성, 주기성을 중심으로

이재준,장주영,곽창재 한국수자원학회 2010 한국수자원학회논문집 Vol.43 No.5

본 연구에서는 국내 기상관측소 중 관측년수가 30년 이상인 관측소 63개 지점에 대한 5개의 수문기상수문인자 즉, 연강수량, 연강수일수, 연평균기온, 연평균상대습도, 연일조시간 자료를 각 지점별로 수집하고, 통계학적 기법인 Wald-Wolfowitz 검정, Mann-Whitney 검정을 이용하여 변동성 분석과 Wavelet Transform을 이용하여 주기성을 분석하였다. 변동성 분석결과 연평균상대습도, 연평균기온에서 공통적으로 변동성이 나타났으며, 연 In this study, for the purpose of analyzing variability and periodicity of Korean hydrologic weather parameters, 5 hydrologic weather parameters data such as annual precipitation, annual rainy days, annual average temperature, annual average relative humi

각종 수문기상인자의 경년별 특성변화 분석 1 : 기본통계량, 경향성을 중심으로

이재준,장주영,곽창재 한국수자원학회 2010 한국수자원학회논문집 Vol.43 No.4

본 연구에서는 국내 기상관측소 중 관측년수가 30년 이상인 관측소 63개 지점을 대상으로 9개의 수문기상수문인자 즉, 연강수량, 연강수일수, 연평균기온, 연평균상대습도, 연일조시간, 연증발량, 연강수계속시간, 연적설일수, 연신적설일수 자료를 각 지점별로 수집하고, 수문기상인자에 대한 기본통계량, 선형회귀분석, 이동평균법을 통해 수문기상인자의 기본적인 특성을 알아보았다. 또한 통계학적기법인 Hotelling-Pabst 검정과 Mann-Kendall 검정을 In this study, for the purpose of analyzing the characteristics of Korean hydrologic weather parameters, 9 hydrologic weather parameters data such as annual precipitation, annual rainy days, annual average relative humidity, annual average temperature, an

수위-유량 관계곡선을 이용한 경년별 수리특성량 변동에 관한 연구 : 낙동강 적포교(赤浦橋) 및 진동(津洞) 지점을 중심으로

이재준,설지수,곽창재 한국수자원학회 2009 한국수자원학회논문집 Vol.42 No.10

본 연구에서는 하상이 경년별로 변화함에 따라 발생되는 수위-유량 관계곡선의 오차를 보완하기 위해 최근(2006 년)의 수위-유량 관계곡선을 기준으로 채택하여 일원화시키고, 과거의 하상상태와 경년별로 작성되어 왔던 수위-유량 관계곡선들과의 관계 및 수위, 단면적, 유속 등에 대한 수리기하학적 특성을 분석하였다. 연구 대상지점으로는 낙동강의 주요지점인 적포교와 진동 지점을 택하였으며, 과거의 실측 유량값을 최근(2006년)하에서의 유량으로 환산하였을 때 얻 In this study, the stage-discharge relation curve made in 2006 is selected with standard curves to seize the hydraulic and geometric characteristics for the temporal variation of the river bed. The relationships among the standard stage-discharge relation

저류지의 규모 및 방류암거의 설계를 위한 간편프로그램 개발

이재준,안재찬,김병일 한국수자원학회 2014 한국수자원학회논문집 Vol.47 No.7

현재 저류시설과 같은 유출저감시설은 국내에 적용된 사례가 거의 없고, 구체적인 설치 기준 및 설계 방법에 대한 기준이 미비하며, 저감량을 정량화하는 것이 곤란한 문제점을 지니고 있다. 이에 따라 유출저감시설의 정량화 지표가 개발될 때까지 국내에서 보편화되어 있는 유역출구 저류시설인 저류지를 기본 저감시설의 형식으로 채택하고 추가적으로 침투형 저감시설을 최대한 적용하고 있는 실정이다. 이러한, 저류지의 설계는 저류용량 및 방류시설에 이르기까지 까다로운 절차를 거쳐 제원을 결정하고 있어 계획단계에서는 불필요한 인력 및 시간이 소모되기도 한다. 따라서 본 연구에서는 기존 FFC11-SimPOND 모형의 저류지 규모결정 과정과 방류암거의 간편설계절차를 일원화하여 계획단계에서 저류지 용량과 방류암거의 설계제원을 손쉽게 산출할 수 있도록 SimPOND-CO 모형을 구축하였다. Recently runoff reduction facilities such as detention ponds were rarely used and limited primarily to cases. A specific installation criteria and method of design for runoff reduction facilities is insignificant in our country. Also it has difficult problems with quantification. A detention pond being installed at outfalls and generalized in our country is adopted as basic form with infiltration facilities because quantification index for runoff reduction facilities have not been developed. A processing of detention pond design has to determinate storage volume and outlet form is very complex and wasting human resources and time in the planning step. In this study, we have been unified FFC11-SimPOND being able to simply calculate size with simplified design method of culvert outlet and made a computing model (SimPOND-CO) for practical users.

연최대강우량의 대표확률분포형 결정을 위한 Jackknife기법의 적용

이재준,이상원,곽창재 한국수자원학회 2009 한국수자원학회논문집 Vol.42 No.10

본 연구에서는 전국의 30년 이상의 강우관측기록을 보유하고 있는 기상청 산하 56개 강우관측소의 연 최대치 강우자료들로부터 확률분포형에 대하여 모멘트법, 최우추정법, 확률가중모멘트법을 이용하여 모수를 추정하고, 그 모수의 범위와 확률변수의 범위에 대한 적정성을 알아보았다. 적정성이 있는 모수를 대상으로 적합도 검정법인 x-검정, K-S검정, Cramer von Mises (CVM)검정, Probability Plot Correlation Coeffici In this study, basic data is consisted annual maximum rainfall at 56 stations that has the rainfall records more than 30years in Korea. The 14 probability distributions which has been widely used in hydrologic frequency analysis are applied to the basic d

우수유출저감용 저류지의 간편설계기법 개발

이재준,곽창재 한국수자원학회 2008 한국수자원학회논문집 Vol.41 No.7

저류지를 설계함에 있어서 주어진 저류지 제원과 방류시설 제원하에서 저류지 설계모의모형을 이용하여 저류추적 을 실시하는 방법을 대치하고자 저류지의 예비설계 단계에서 저류지 최적계획모형에 의해 산정된 저류용량을 초기 가정치로 사용하거나 개발전후의 첨두유량비인 를 사용하여 저류지를 간편설계하기 위한 관련변수 해석을 실시하 였다. 관련변수 해석을 통해 저류지의 유입첨두유량에 대한 저류지 첨두방류량의 비인 첨두유량비 와 저류지의 저류비 , 저류지의 방류구조 크기 Detention pond has an important role in peak flow reduction to mitigate flood damage. Design of detention pond is accomplished through the preliminary stage, and design stage in general. New development projects produce increased peak flow and flow amount

노후 재활용 아스팔트 콘크리트 산화도 평가 방법 개발 연구

이재준,강성일,임란 아메드,문성제,권오선 한국도로학회 2019 한국도로학회논문집 Vol.21 No.2

PURPOSES : The purpose of this paper is to develop an evaluation method for aged reclaimed asphalt pavements using RAP mortar specimen and FTIR method. METHODS: To evaluate the low-temperature behavior of aged reclaimed asphalt pavements, an indirect tensile strength test was adopted with an RAP mortar specimen. The RAP mortar specimen without a rejuvenator was fabricated with two fine aggregate types as a function of passing sieve sizes. The fabricated RAP mortar specimen was frozen for 24 h at -20℃. The indirect tensile strength was measured as a function of different absolute viscosities. The indirect tensile strength and displacement were varied as functions of the dosage of the rejuvenator. The spectroscopy analysis of four asphalt binders was performed under attenuated total reflection. The four asphalt binders comprised of a virgin binder, two extracted RAP binders, and a mixed virgin and extracted RAP binder. To evaluate the oxidation of the binder, the carbonyl index was calculated. RESULTS : The four extracted RAP binders were measured with an extremely wide range of absolute viscosity from 30,000 poise to 170,000 poise. The indirect tensile strength of the RAP mortar decreased as the absolute viscosity increased. This means that at lower temperatures, the indirect tensile strength can indicate the oxidation of RAP. Also, the indirect tensile strength and displacement changed sensitively as the dosage of the rejuvenator was changed. Based on the FTIR principle, a good relation was observed between the dosage of the rejuvenator and the FTIR absorbance peak. It can be used to estimate the dosage of the rejuvenator in hot reclaimed asphalt mixture. Also, the carbonyl index of the RAP binder was calculated to evaluate asphalt oxidation using the FTIR principle. CONCLUSIONS : There is a good relation between the indirect tensile strength of RAP mortar and its absolute viscosity. This indicates that RAP mortar can be used to estimate the properties of aged RAP. Also, the usage of rejuvenator can be evaluated with both the indirect tensile strength and FTIR absorbance peak. The carbonyl index can be used to predict asphalt oxidation.

공기청정기 필터의 라돈 저감 성능 평가 시스템 개발

이재준,김선홍,김민준,차동욱,조승연 한국냄새환경학회 2017 실내환경 및 냄새 학회지 Vol.16 No.1

In this study, a system was developed that can evaluate the radon gas removal efficiency of air cleaner filters. The system has three acrylic chambers connected in series;: the 1st chamber, the filter chamber and the 2nd chamber. In the 1st chamber, a radon source and an air pump were installed to create an environment with a constant radon concentration. Radon concentration in the two chambers was continuously monitored by ionization chamber detectors(RD-200, FRD1600, FTLab, Korea) and, in the 2nd chamber, the radon concentration increase of air filtrated by each filter was inter-compared. HEPA filters and two honeycomb type filters were evaluated. Results of HEPA filter, GAC 1 and GAC 2 were 1142 Bq, 7016 Bq and 12053 Bq, respectively. HEPA filter showed a significantly lower capacity for radon removal than the GAC filters. Also, the GAC 2 filter showed a more than 70 % better result compared to GAC 1 due to the difference in filter materials. Therefore, this system can be used to evaluate the radon removal ability of air cleaner filters, by filter type and filter material.

휴대폰 애프터서비스 품질이 고객만족과 고객충성도에 미치는 영향

이재준,유지현,이세재,오현승,조진형 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.4

This study aims to configure what dimensions make up for smart phone after service quality, and how this service quality affects customer satisfaction and customer loyalty. Smart phone market is a market of the device leading the digital convergence as well as positioning itself as one of the national growth driving industry. To survive in this matured market, companies should have to respond actively to radical changes and customers needs in the so-called Smart Revolution environment. Lately, however, the smart phone market is prospected to move from growth phase to mature phase by the scholars. In order to proactively respond to the change in such market condition, companies need to provide absolute advantage in customer loyalty over their competitors by revolutionizing the after-sales service quality. Qualified A/S will lead to service satisfaction and achieve customer loyalty. The empirical analysis results obtained through A/S quality are as follows : First, human quality (attitude, expertise, problem-solvability), environment quality (handling agility, convenience, comfort), service policy quality (quality guarantee, additional service operation) are dimensions that make up for A/S quality. Second, A/S quality dimension showed a significant positive influence on service satisfaction and A/S satisfaction showed a positive influence on customer loyalty as well. Based on this empirical study, we propose some implications for A/S quality improvement. First, human quality dimension has relatively higher influence on A/S satisfaction in case of free A/S, so companies need to solve the product problem completely when consumer’s first visit by continual employee education. Second, in case of paid A/S, the service policy quality-especially A/S Warranty period- has higher influence on A/S satisfaction.