• Journal of the Society of Disaster Information
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• v.11 no.4
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• pp.548-555
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• 2015

This paper aims to estimate the service life of the target bridge structures subjected to chloride ingress from de-icer, which is used for safety of vehicles in winter, by investigating the chloride ingress into concrete. In this study, the 10-year-old bridge structures were investigated by measuring the chloride along the depth from the exposed surface to derive the surface chloride concentration and the diffusion coefficient for the prediction of service life. The service life of each measured point on the structures were estimated with the surface chloride concentration and the diffusion coefficient by using Life-365 software. As a result, it was estimated for all measured points to have over 100-year service life. Furthermore, the diffusion coefficient and the service life from the measured data were compared to another method calculated with the concrete mix, considering the time dependency of diffusion coefficient.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2003.11a
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• pp.369-392
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• 2003

최근 물류환경의 변화로 제품의 신속한 수송과 고객 지향적 물류서비스 제공의 극대화를 꾀하려는 기업들은 제3자 물류의 활용에 커다란 관심을 가지게 되었다. 기업이 제3자 물류업체 활용을 통한 성과를 높이기 위해서는 고객서비스의 향상, 물류관련 비용의 절감 및 물류활동에 대한 운영효율의 향상을 수행할 수 있는 물류업체를 선정하는 것이 중요하다 할 것이다. 본 연구에서는 제3자 물류업체 선정과 관련한 주요 선행연구의 종합적인 고찰을 통하여, 제3자 물류업체 선정에 대한 평가기준들을 도출하였다. 선정을 위한 기준으로 비용, 물류서비스, 업체평가, 정보시스템의 4가지 항목으로 나누었고, 이를 계층화하여 AHP기법을 통하여 분석하였다. 그 결과 상위기준의 상대적 중요도는 물류서비스가 0.425로 가장 높게 나타났고, 비용(0.232), 정보시스템(0.224), 업체평가(0.120) 순으로 나타났다. 비용의 항목에 포함되어 있는 하위기준의 중요도는 경제성이 0.710, 안정성이 0.290으로 나타났다. 물류서비스 항목에 포함되어 있는 하위기준의 중요도는 신뢰성이 0.780, 유연성이 0.220로 나타났다. 업체평가 항목에 포함되어 있는 하위기준의 중요도는 기업역량이 0.507, 관계지향성이 0.493로 나타났다. 정보시스템 항목에 포함되어있는 하위기준의 중요도는 정보인프라가 0.471, 정보활용도는 0.529로 나타났다. 분석에 있어 추가적으로 학계와 실무계 전문가 집단으로 나누어 그 중요도를 산출하였는데, 학계 전문가 집단과 실무계 전문가 집단 모두 상위기준에 있어 물류서비스가 가장 높게 나타났다. 주목할만한 점은 학계 전문가 집단의 경우 정보시스템이 비용보다 더 높게 나타난 반면에, 실무계 전문가 집단은 비용이 정보시스템 보다 더 높게 나타났다는 것이다.

• Journal of Environmental Impact Assessment
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• v.20 no.6
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• pp.823-831
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• 2011

파라과이와 한국의 환경영향평가에 관련된 제도와 법률은 환경영향평가 대상사업, 실행방법 및 사후감시 등에서 상이하다. 양국의 환경영향평가 제도 중에는 전혀 관련 없는 것도 있는데, 경제적, 사회적, 문화적, 역사적 그리고 지연조건이 상이하여 양국의 환경영향평가 제도에 영향을 주는 것으로 분석된다. 파라과이에서는 스코핑이 Term of References (TOR)가 준비되는 단계이다. TOR은 환경부에 의해 준비된 특정의 환경영향평가의 요구조건을 포함한다. 파라과이에서는 스코핑 단계에서 환경부의 주도로 주민참여가 진행된다. Environmental Impact Relatorio (RIMA)가 개발사업으로 인해 영향을 받는 지역사회에 시행되고, 간결하고 이해하기 쉬운 표현으로 작성된다. 파라과이에서는 EIS가 승인되기 전에 RIMA를 지역사회에 공개한다.

• Transactions of the Korean Society of Mechanical Engineers
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• v.15 no.3
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• pp.931-935
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• 1991

본 연구에서는 유효응력확대계수로서 피로크랙 진전수명을 평가할 수 이용되 는 크랙열림비(본 논문에서는 후술하는 최대응력에 대한 크랙 열림응력의 비를 크랙 열림비로 하다)가 진전수명에 미치는 영향을 평가하기 위한것으로서, 제1보에서는 실 험에 의하여 크랙 열림점을 실측한 결과 측정입치에 따라 다른 값을 나타내며 수명평 가법 크랙 선단으로부터 떨어진 곳(크립게이지를 이용한 크랙마우스등)에서 측정한 크 랙 열림점 값을 이용함이 보다 정확함을 밝혔다.본 제2보에서는 크랙열림비가 수명 평가에 미치는 영향을 상기의 파라미터 영향도 평가수법을 이용하여 평가하고자 한다.

• 대학교육
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• s.148
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• pp.53-61
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• 2007

지금까지 대학교육의 질적인 측면을 평가하려는 다양한 지표 개발이 있었다. 교육의 성과를 간접적으로 평가하는 지표들이 대표적인 사례다. 하지만 지표들이 질적인 측면을 제대로 평가하지 못한다는 한계점을 드러내왔다. 이를 볼 때 커리큘럼 평가는 해당 분야의 전문가들을 대상으로 한 동료평가 방식으로 진행하는 것이 타당하며 통계상의 오류를 방지하기 위한 보완이 뒤따라야 할 것이다.

• The Journal of the Korea Contents Association
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• v.11 no.5
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• pp.233-241
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• 2011

The purpose of this study was to investigate the correlation between ultrasonographic findings used to diagnose and assess of torticollis and a overall special assessment of congenital muscular torticollis in infants. Seventy-eight subjects with congenital muscular torticollis participated in this study. All the patients were divided into one of four clinical types according to the sternocleidomastoid muscle fibrosis noted on the ultrasonographic findings, and they were divided into one of three subgroups according to the degree of disability on the overall special assessment score of torticollis. For the ultrasonographic classifications of the 78 patients, 42(53.8%) made up the first type, 21 (26.9%) made up the second type, 7 (9.0%) made up the third type, and 8 (10.3%) made up the fourth type. Multivariate analysis of the results showed that the age at presentation was significantly different according to the ultrasonographic subtypes (p<0.01). There was significant correlation between the ultrasonographic findings and the torticollis overall assessment for patients with congenital muscular torticollis (${\phi}$=0.893, p<0.01). According to the results of this study, the use of the simple and objective torticollis overall assessment will be useful for the evaluation of torticollis in the future.

• Journal of the Korea institute for structural maintenance and inspection
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• v.26 no.4
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• pp.48-56
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• 2022

Controlling the setting time of cementitious materials is one of the most important factors in securing early-age performance of concrete structures. Recently, the use of retarding admixtures, which enable the inhibition of some hydration products to control the securing time due to average temperature rise is suggested. Although various non-destructive evaluation methods have been proposed to evaluate cement hydration and hardening of cement-based materials to overcome the limitations of Vicat needle test, experimental research is still required to use the non-destructive evaluation method with added retarding admixtures. In this study, measurements of electrical resistivity and ultrasonic wave velocity in early-aged cement pastes were performed according to the addition of retarding admixture(tartaric acid). The setting time of the cement pastes was evaluated by obtained rising time of the both non-destructive measurements. As a result, the possibility of evaluating the setting delay in cement pastes was confirmed through comparative analysis with the initial and final setting times by Vicat test. In addition, X-ray diffraction results at the rising time of electrical resistivity showed a key hydration product affecting the setting delay.

• Journal of Engineering Education Research
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• v.3 no.1
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• pp.92-98
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• 2000

We have analyzed the result of course evaluation in a department for five semesters. The results of the students' course evaluation varied on individual lecturer, however the average score was improved initially and it was saturated after several semesters. Based on these results, we suggest several effective methods of using the evaluation results. We also suggest to study more in improving the questionnairs of the evaluation format to receive students' positive responses for the better course in the future. As a conclusion, the course evaluation system must be carefully introduced and it should be used only for improving the course itself. When this system is applied to evaluating the capability of lecturers, lecturers would easy their requirements and standards of the education and this causes a lot of problems in the case of the USA.

• The Journal of the Korea Contents Association
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• v.16 no.10
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• pp.33-46
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• 2016

The present study aims to investigate how teachers evaluate the Korean textbook they use for teaching primary students with multicultural background. Faced with the rich variety of materials available, it is often a challenging task for language teachers to select the most suitable coursebook. It is required that they carry out a detailed and comprehensive analysis of coursebooks and evaluate them with a set of criteria to guide the process. 32 Korean teachers took part in the primary KSL textbook evaluation that aimed to identify improvement areas. They used a pro-forma specified with 51 criteria. The teachers' responses to the questions in the pro-forma were statistically analyzed to draw implications for material evaluation. The findings of the analysis suggest that the KSL textbook for primary multicultural students need to be improved at the internal and external levels. Implications are discussed with focus on material evaluation and development, and KSL teacher professional development by helping them gain good and useful insights into the nature of the textbook, and sensitizing them to features to look for in teaching and learning materials.

• Progress in Medical Physics
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• v.17 no.4
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• pp.246-251
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• 2006

The purpose of this study was to evaluate SUV (standard uptake value) using different reconstruction methods in whole body PET/CT Imaging. PET/CT studies were peformed with and without correction for effect of contrast media. The patients data were acquired using GE DSTe commercial PET/CT system. The liver disease (hepatocellular carcinoma, HCC) and renal disease (renal ceil carcinoma, RCC) patients were selected for this study, The PET/CT data were reconstructed using post CT scan with and without correction for effect of contrast media. We selected ROIs (region of Interest) at the same location and same area for the same patient to compare SUVs in these two methods. For HCC and RCC, the average differences of SUVs were measured as $1.5{\pm}1.2%\;and\;1.0{\pm}0.9%$, respectively. For HCC and RCC, the maximum differences of SUVs were measured as 4.3% and 1.9%, respectively. We observed that SUVs without correction for effect of contrast media were higher than SUVs with correction for effect of contrast media. However the differences of SUVs were very minimal. These results may be limited to HCC and RCC and further studies will be Heeded for other organs or diseases to see any changes in SUV with and without correction for effect of contrast media.