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        Fluorescence Characteristic Spectra of Domestic Fuel Products through Laser Induced Fluorescence Detection

        Ting-Nien Wu,Shui-Ping Chang,Wen-Hsien Tsai,Cian-Yi Lin 한국지하수토양환경학회 2014 지하수토양환경 Vol.19 No.5

        Traditional investigation procedures of soil and groundwater contamination are followed by soil gas sampling, soil sampling,groundwater sampling, establishment of monitoring wells, and groundwater monitoring. It often takes several weeks toobtain the analysis reports, and sometimes, it needs supplemental sampling and analysis to delineate the polluted area. Laserinduced fluorescence (LIF) system is designed for the detection of free-phase petroleum pollutants, and it is suitable for onsitereal-time site investigation when coupling with a direct push testing tool. Petroleum products always contain polycyclicaromatic hydrocarbon (PAH) compounds possessing fluorescence characteristics that make them detectable through LIFdetection. In this study, LIF spectroscopy of 5 major fuel products was conducted to establish the databank of LIFfluorescence characteristic spectra, including gasoline, diesel, jet fuel, marine fuel and low-sulfur fuel. Multivariate statisticaltools were also applied to distinguish LIF fluorescence characteristic spectra among the mixtures of selected fuel products. This study successfully demonstrated the feasibility of identifying fuel species based on LIF characteristic fluorescencespectra, also LIF seemed to be uncovered its powerful ability of tracing underground petroleum leakages.

      • KCI등재

        Fluorescence Characteristic Spectra of Domestic Fuel Products through Laser Induced Fluorescence Detection

        Wu, Ting-Nien,Chang, Shui-Ping,Tsai, Wen-Hsien,Lin, Cian-Yi Korean Society of Soil and Groundwater Environment 2014 지하수토양환경 Vol.19 No.5

        Traditional investigation procedures of soil and groundwater contamination are followed by soil gas sampling, soil sampling, groundwater sampling, establishment of monitoring wells, and groundwater monitoring. It often takes several weeks to obtain the analysis reports, and sometimes, it needs supplemental sampling and analysis to delineate the polluted area. Laser induced fluorescence (LIF) system is designed for the detection of free-phase petroleum pollutants, and it is suitable for on-site real-time site investigation when coupling with a direct push testing tool. Petroleum products always contain polycyclic aromatic hydrocarbon (PAH) compounds possessing fluorescence characteristics that make them detectable through LIF detection. In this study, LIF spectroscopy of 5 major fuel products was conducted to establish the databank of LIF fluorescence characteristic spectra, including gasoline, diesel, jet fuel, marine fuel and low-sulfur fuel. Multivariate statistical tools were also applied to distinguish LIF fluorescence characteristic spectra among the mixtures of selected fuel products. This study successfully demonstrated the feasibility of identifying fuel species based on LIF characteristic fluorescence spectra, also LIF seemed to be uncovered its powerful ability of tracing underground petroleum leakages.

      • KCI등재

        Evaluating the effects of programs for reducing achievement gaps: a case study in Taiwan

        Yao-Ting Sung,Fen-Lan Tseng,Nien-Ping Kuo,Tien-Ying Chang,Jia-Min Chiou 서울대학교 교육연구소 2014 Asia Pacific Education Review Vol.15 No.1

        Considering that achievement gaps have become a serious educational problem worldwide, the Ministry of Education in Taiwan has been addressing a series of policies to reduce achievement gaps, but the effect of these policies has not yet been carefully examined. Therefore, the present study investigated current educational policies, achievement gap phenomenon, and its changing trends in the use of national standardized tests in Taiwan and evaluated the degree to which these policies are reducing the achievement gaps among Taiwanese students. Junior high school graduates who took the high school entrance examination between 2004 and 2010 were recruited to examine the associations between their academic achievements and variables such as socioeconomic status (SES), ethnicity, and school district. Time series analyses were conducted to determine the longitudinal trends for the achievement gaps. The results revealed that achievement gaps are decreasing among different ethnicities, but they are increasing among different SESs and school districts. These findings demonstrate some positive effects of the educational policies introduced in Taiwan, but also the need for further modification and precise implementation of these policies. Suggestions for implementing educational programs and policies to reduce achievement gaps are also presented.

      • KCI등재

        Radiotherapy combined with chemotherapy increases the risk of herpes zoster in patients with gynecological cancers: a nationwide cohort study

        Peng-Yi Lee,Jung-Nien Lai,Shang-Wen Chen,Ying-Chun Lin,Lu-Ting Chiu,Yu-Ting Wei 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.2

        Objective: This study aimed to determine the effect of radiotherapy (RT) on the risk of herpeszoster (HZ) in patients with gynecological cancers via a nationwide population-based study. Methods: Based on patient data obtained from the National Health Insurance ResearchDatabase, 1928 gynecological cancer patients were identified with 1:1 matching for RT andnon-RT cohorts by age, index date, and cancer type. Another cohort consisting of 964 non cancer individuals matched was used as normal control. The incidence of HZ was comparedbetween cancer patients with and without RT. Age, comorbidities, cancer-related surgery andchemotherapy (CT), and cancer type were adjusted as confounders. Results: The risk of HZ in cancer patients was higher than that of non-cancer individuals(14.23 versus 8.34 per 1,000 person-years [PY], the adjusted hazard ratio [aHR]=1.38,p=0.044). In the cancer population, the incidence of HZ for the RT and non-RT cohorts was20.55 versus 10.23 per 1,000 PY, respectively (aHR=1.68, p=0.009). Age >50 years was anindependent factor for developing HZ. The 5-year actuarial incidence for patients receivingneither RT nor CT, RT alone, CT alone, and combined modalities was 5.4%, 6.9%, 3.7%,and 9.9%, respectively (p<0.001). In the RT cohort, the risk rose rapidly in the first year,becoming steady thereafter. Conclusion: This population-based study showed that gynecological cancer patientsreceiving RT combined with CT had the highest cumulative risk of HZ. Health careprofessionals should be aware of the potential toxicities.

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