• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.39 no.6
• /
• pp.913-921
• /
• 2019

The government introduced the comprehensive evaluation bidding system with the goal of pursuing the best value and the global standard in 2016. However, for the evaluation criteria on the construction evaluation reflected to the comprehensive evaluation bidding system, the problems of the objectivity insufficiency, the inclusion of multiple subjective evaluation items, and the irrationality of the weight for each evaluation item are continue to be presented. The central office group, the local government, the relevant industry, and the expert group share recognition, but the solution is not derived. Hence, the major evaluation items to be improved were derived with the characteristics analyzed to secure the objectivity of the construction evaluation. For the analysis method, the standard deviation and the Fleiss Kappa analysis method were used by utilizing the characteristics that the construction evaluation criteria consist of all 4-point measures (good, average, insufficient, and poor). According to the result, the 10 evaluation items of the total 25 construction evaluation items were derived as the evaluation items to be improved. It was found in the analysis on the major characteristics of the derived evaluation items that the qualitative evaluation criteria such as 'Very Suitable' and 'Suitable' were commonly included in the detailed evaluation guidelines. Hence, as far as the future construction evaluation standards are concerned, the qualitative evaluation standards are sublated, and the improvement should be made mainly for the quantitative evaluation criteria enabling the objectivity assurance.

• Korean Journal of Construction Engineering and Management
• /
• v.20 no.6
• /
• pp.89-97
• /
• 2019

Recently, BIM has been actively introduced in construction projects. In particular, the introduction of BIM in cost estimating process is expected to improve the accuracy and efficiency of the cost estimate. However, the quantity calculation and BoQ documents preparation process still require manual work. Although the BIM model may support quantification process, it is still problematic that the level of detail of the model must be very detailed to meet the items in BoQ. To address this, it is necessary to analyse the LOD criteria and to analyze the extent to which quantity can be computed according to the level of detail in the BIM model. For the analysis of LOD-based work items, the work item grades were divided into A,B, and C. In this study, the ratio and cost of each item that can be calculated at the LOD level in the detailed design phase are reviewed for each type of work, and the method for improving the quantity calculation using BIM is proposed. In the LOD 300 stage(Detailed design stage), the largest number of items in the class B, the major improvement class, are window and glass work. In addition, the most expensive type of work was analyzed by reinforced concrete work. In the future, it is necessary to suggest appropriate improvement way for items with high item ratios and items with high cost ratios. The results of this study are expected to be used as a BIM-based cost estimation or as basic data for improving the current BoQ system.

• The Journal of Korean Academy of Sensory Integration
• /
• v.18 no.2
• /
• pp.15-28
• /
• 2020

Objective : The purpose of this study was to verify the construct validity of Short Sensory Profile-2 (SSP-2) for children with Autism Spectrum Disorder (ASD). Methods : Data were collected from SSP-2 for 120 parents of ASD children. Raw data were analyzed by applying the Rasch analysis to the goodness fit of person and item, item difficulty, rating scale, and separation reliability of SSP-2. Results : 7 persons in sensory processing area and 8 persons in behavioral response area were inappropriate criteria and excluded from the analysis. Item goodness-of-fit analysis determined that the If the Mnsq value is between 0.6 and 1.4 and the Z value is outside the ±2 range for nonconformity. this study All items in the instrument were found to have appropriate criteria. Item difficulty analysis in sensory processing area was high in item 13 (.48 logit) and low in item 10 (-.54 logit). In the behavioral response area, item 25 (1.58 logit) was high and item 30 (-.68 logit) was low. In the rating scale analysis, it was found that the 3-point scale is more appropriate than the 5-point scale. The separation reliability of sensory processing area was .90 and the behavioral response area was .95. Conclusion : This study verified the construct validity of SSP-2 and expected to be applied as a useful evaluation tool for children with ASD.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2021.06a
• /
• pp.403-403
• /
• 2021

비점오염물질은 강우에 의해 유출되며 계절적, 자연적 편차가 크게 나타나고, 오염원이 광범위하게 산재하고 있어 오염물질의 발생량과 부하량의 관리가 쉽지 않다. 따라서 비점오염원 관리지역은 오염물질이 하천에 미치는 수질 특성을 파악하는 것이 중요하다. 그러나 수질항목만으로 하천의 수질 특성을 파악하기에는 어려움이 있으며, 수질 특성을 파악하기 위해 다양한 분석방법이 필요하다. 본 연구에서는 비점오염원 관리지역 중 골지천 유역의 수질 특성을 파악하기 위해 통계분석 기법을 활용하여 수질항목간의 상관관계를 분석하고자 하였다. 2017년부터 2019년까지 골지천 유역 내 5개 지점에 대하여 비강우시 23회, 강우시 지점별 173회~196회의 모니터링 결과를 이용하였으며, EC, 탁도, BOD₅, SS, T-N, T-P, TOC의 수질항목을 이용하여 Pearson 상관관계 분석을 실시하였다. 상관관계 분석 결과 비강우시 분석 결과 EC는 -0.06~-0.32, T-N은 0.19~0.37로 낮은 상관성을 갖는 것으로 나타났으며, EC와 T-N을 제외한 탁도와 BOD₅, SS, T-P, TOC의 경우 서로 0.6 이상의 상관성을 갖는 것으로 나타났다. 특히, 탁도와 SS, T-P, T-P와 TOC는 0.9 이상의 높은 상관성을 갖는 것으로 나타났다. 강우시 분석 결과 EC는 비강우시와 유사하게 -0.07~-0.24로 낮은 상관성을 갖는 것으로 나타났으며, TOC를 제외한 탁도, BOD₅, SS, T-N, T-P의 경우 서로 0.6 이상의 상관성을 갖는 것으로 나타났다. TOC의 경우 BOD₅, SS와 0.6 이상의 상관성을 갖는 반면 탁도, T-N, T-P와는 0.45, 0.44, 0.57로 다른 항목에 비해 다소 낮은 상관성을 갖는 것으로 나타났다. 비강우시 T-N은 기저 유출에 의한 영향으로 높은 농도를 나타내 다른 항목에 비해 상관성이 낮은 것으로 나타났으며, 강우시에는 비점오염물질의 유입으로 인하여 모든 항목에서 비슷한 상관성을 보이는 것으로 나타났다. 본 연구 결과 탁도와 SS, T-P의 상관성이 비강우시 0.93, 강우시 0.78로 상당히 높은 것으로 나타나, 탁도를 측정하여 SS와 T-P로 환산하여 측정하는 방법에 대한 기초자료로 활용될 수 있을 것으로 판단된다. 그러나 연구 유역의 지형적 특성이 배제되었기 때문에 추후에 이를 반영한 연구가 필요할 것으로 판단된다.

• Proceedings of the Korean Statistical Society Conference
• /
• 2000.11a
• /
• pp.123-127
• /
• 2000

인터넷이 데이터 저장 및 서비스를 위한 도구로 폭넓게 활용되고 있으며, 이 과정에서 웹 서버 방문객에 대한 정보인 로그가 발생된다. 이러한 로그는 방문객 주소, 참조 페이지, 방문 시각 등의 정보를 포함하고 있다. 웹 로그에 대하여 패턴분석(pattern analysis), 군집분석(clustering), 판별분석(classification) 등의 통계적 분석을 통하여 방문객이 관심을 가지는 항목이나 항목간의 연관관계 등 새로운 정보를 생성하여 웹 디자인 또는 비즈니스에의 적용에 대한 연구가 활발히 논의되고 있다. 본 연구에서는 웹 로그 분석에 대하여 소개하고 웹 로그 분석을 위한 방안을 제시하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2018.11a
• /
• pp.355-356
• /
• 2018

본 연구에서는 국내 항만보안 효율성을 측정하기 위한 사전연구로 항만보안에 있어서 중요 평가항목을 선정하고 평가하는데 목적이 있다. 이를 위해 문헌조사 및 관계자들의 인터뷰를 통해 평가항목을 선정하였고, 이들 항목을 4개의 대분류와 12개의 중분류로 분류하였다. 다음으로 해양수산부 공무원, 항만공사 직원, 학계 관계자들로 구성된 전문가들의 설문조사를 통해 평가항목에 대하여 AHP 기법을 이용하여 중요도를 산출하였다. 상위 수준의 중요도 산출결과, 해양수산부 공무원 그룹과 항만공사 직원 그룹은 시설 지원 항목의 중요도가 높았으며 학계 관계자 그룹의 경우 인력예산 지원 항목의 중요도가 높았다. 하위 수준 항목의 종합중요도 분석 결과, 해양수산부 공무원 그룹과 항만공사 직원 그룹에서는 항만 내 통합시스템 구축 및 유관기관 간의 협조를 통한 운영시스템 강화의 순위가 가장 높았으나, 학계 관계자 그룹의 경우 보안인력들의 처우개선이 가장 높은 순위로 나타났다.

• Therapeutic Science for Rehabilitation
• /
• v.7 no.4
• /
• pp.31-41
• /
• 2018

Objective: This study was to develop computerized screening test items for mild cognitive impairment. Methods: Through literature reviews, items from computerized tests for screening mild cognitive impairment were extracted. A panel of professional experts validated that the items were important and fit to screen for mild cognitive impairment. Results: A total 37 items were extracted from 12 computerized tests and 11 new items were added through the first panel review. After that, 18 items were removed via the second panel review. Finally, 16 items were selected by analyzing content validity ratio. 16 items consisted of memory, attention, and executive function areas. Conclusions: A total of 16 computerized test items were developed. It is urgent to validate them to screen mild cognitive impairment. Moreover, standardization studies for this test are required in the future.

• The Journal of Sustainable Design and Educational Environment Research
• /
• v.22 no.2
• /
• pp.1-16
• /
• 2023

This paper reports on three Delphi surveys based on draft evaluation items with the aim of deriving evaluation items prior to developing a BF certification index for school facilities in order to make the index safe and convenient. To this end, problems were formulated using content analysis and follow-up evaluation of existing BF certification indicators. Draft BF certification evaluation items for school facilities were proposed. The adequacy of each evaluation item was verified using a Delphi survey. Experts and working-level groups, such as university professors, architects, public officials, certification agencies, and organizations for disabled persons, provided feedback for all evaluation items for school facility BF, which was incorporated in the final evaluation items. As a result of the Delphi surveys, in addition to the existing 8 evaluation items, a total of 75 evaluation items were proposed as maintenance items, 12 as improvement review items, and 15 as new evaluation items.

• Journal of Environmental Policy
• /
• v.11 no.3
• /
• pp.67-96
• /
• 2012

The Ministry of Environment in Korea has been promoting the urban stream restoration project for paved streams in cities as the restored Cheonggyecheon. As an elementary study for suggesting policy implications for the project, cost and benefit criteria for an ex-post analysis on the Cheonggyecheon project is suggested in this study. The ex-ante analysis were reviewed critically by focusing on the cost and benefit criteria. Ex-post analysis plan in this study is developed considering the standard guideline of pre-feasibility, the theory of cost-benefit analysis, and the review results. The costs for compensating lands, amending conflicts, researching rivers, and maintaining water quantity were also included. For the benefits, this study proposes to estimate the benefits with the assessment on naturalness of stream. The results are expected to contribute to increase the efficiency of the urban stream restoration project and evaluate the project to match better with the meaning of the river restoration.

• The Journal of the Korea Contents Association
• /
• v.18 no.1
• /
• pp.305-313
• /
• 2018

Public open data is a database or electronic file produced by a public agency or government. The government is opening public data through the open data portals and individual agency websites. However, it is a reality that there is a limit to search and utilize desired public data from the perspective of data users. In particular, it takes a great deal of effort and time to understand the characteristics of data sets and to combine different data sets. This study suggests the possibility of interlinking between data sets by analyzing the common relationship of item names held by public data. The data sets are collected from the open data portal, and item names included in the data sets are extracted. The extracted item names consist of formal context and formal concept through formal concept analysis. The format concept has a list of data sets and a set of item name as extent and intent, respectively, and analyzes the common items of intent end to determine the possibility of data connection. The results derived from the formal concept analysis can be effectively applied to the semantic connection of the public data, and can be applied to data standard and quality improvement for public data release.