• Radiation Oncology Journal
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• v.35 no.1
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• pp.90-100
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• 2017

Purpose: To Study the dosimetric advantage of the Jaw tracking technique in intensity-modulated radiotherapy (IMRT) and volumetric-modulated arc therapy (VMAT) for Head and Neck Cancers. Materials and Methods: We retrospectively selected 10 previously treated head and neck cancer patients stage (T1/T2, N1, M0) in this study. All the patients were planned for IMRT and VMAT with simultaneous integrated boost technique. IMRT and VMAT plans were performed with jaw tracking (JT) and with static jaw (SJ) technique by keeping the same constraints and priorities for a particular patient. Target conformity, dose to the critical structures and low dose volumes were recorded and analyzed for IMRT and VMAT plans with and without JT for all the patients. Results: The conformity index average of all patients followed by standard deviation (${\bar{x}}{\pm}{\sigma}_{\bar{x}}$) of the JT-IMRT, SJ-IMRT, JT-VMAT, and SJ-VMAT were $1.72{\pm}0.56$, $1.67{\pm}0.57$, $1.83{\pm}0.65$, and $1.85{\pm}0.64$, and homogeneity index were $0.059{\pm}0.05$, $0.064{\pm}0.05$, $0.064{\pm}0.04$, and $0.064{\pm}0.05$. JT-IMRT shows significant mean reduction in right parotid and left parotid shows of 7.64% (p < 0.001) and 7.45% (p < 0.001) compare to SJ-IMRT. JT-IMRT plans also shows considerable dose reduction to thyroid, inferior constrictors, spinal cord and brainstem compared to the SJ-IMRT plans. Conclusion: Significant dose reductions were observed for critical structure in the JT-IMRT compared to SJ-IMRT technique. In JT-VMAT plans dose reduction to the critical structure were not significant compared to the SJ-IMRT due to relatively lesser monitor units.

• Korean Journal of Organic Agriculture
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• v.27 no.4
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• pp.463-477
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• 2019

This study was conducted to compare the community structure and biodiversity of epigeic spiders between pear fields cultivated by integrated pest management (IPM) and organic methods. This is the first study of this kind to be conducted in Korea. Eighty-four spider species from 22 families were identified among the collected 2,489 arthropods, with 754 individuals being sampled from IPM fields and 1,735 individuals from organic fields. Generally, Theridiidae, Linyphiidae, Lycosidae, Agelenidae, Gnaphosidae, and Salticidae were the dominant spider families in the pear orchard regardless of the farming methods, and species richness and abundance were higher in organic fields than in IPM fields. The dominant species were the wolf spiders (Lycosidae) and stone spiders (Gnaphosidae), and their cumulative abundance was 70.7% in IPM fields and 72.7% in organic fields. The community structure between organic and IPM fields was heterogeneous, with a 45% similarity level. Biodiversity, species richness, abundance, and species diversity index were higher in organic fields than in IPM fields, and significantly different between the farming methods. Seasonal fluctuations in biodiversity were similar in both IPM and organic fields. The species richness and species diversity index increased and the abundance decreased in the second half of the cultivation period. This study on the community structure and biodiversity of epigeic spiders, which form one of the most important predator groups, will provide principal ecological and faunistic information required to maintain the biodiversity of useful arthropods in agricultural ecosystems and help implement sustainable agriculture based on the active use of natural enemies.

• Applied Chemistry for Engineering
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• v.7 no.3
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• pp.424-432
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• 1996

The fiber reinforced thermoplastic composites(FRTP) were prepared with polypropylene fiber(PPF) as matrix and vinylon(VF), Aramid(KF) or nylon fiber(PAF) as reinforcing materials using the integrated fiber mixing apparatus. The composite sheets were prepared by compression molding and their impact and morphological properties were characterized. VF/PP system showed the maximum value in Izod impact strength, while KF/PP system showed the maximum value in high rate impact properties. Ductility Index(DI) order was VF/PP>KF/PP>PAF/PP. A maximum DI for VF/PP, 2.43, was obtained when the weight fraction of VF was 20%. The optimum amount of the reinforcing organic fiber was found to be 20~30%. As a result, it is concluded that VF/PP system has better interfacial adhesion properties than either KF/PP or PAF/PP.

• Korean Journal of Construction Engineering and Management
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• v.11 no.4
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• pp.3-11
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• 2010

Currently the quality of construction drawings is deteriorated due to restrictions on time costs allowed to the design phase. Moreover shop drawings are arbitrarily produced without the standard criteria, and cleared off after the completion of construction. As a result, the information of produced shop drawings is not feedback to the design phase, and the quality of the construction drawings become worse. This study proposes checklists that include information requested at construction sites and the shop drawings as well as the existing checklists for the construction drawings. The checklists integrate designer's check-items according to breakdown of drawings and contractor's check-items base don construction process. Index matrices of the integrated checklists is developed for practical application of the checklists, and validated through intensive interview with design and construction practitioners.

• 기술발표회
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• s.2006
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• pp.279-291
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• 2006

This study shows decision-making process for selection of cutoff wall on a wastewater treatment project. There are 10 different cut-off wall methods So, we examine the site to gather information for find appropriate methods. After using that information, 10 cutoff wall methods are reviewed for analysis. Through brainstorming, four alternatives are selected for design VE item. Following the standard VE process, we established performance criteria and evaluated function score(F) using questionnaire. The questionnaires, brainstorming and AHP method for weighting on performance criteria and evaluate function score increased the reliability of this selection process. Water Jet method, one of four methods, has the best function score(F=92.71) and the lease construction cost(as cost index 1,000). The value score also highest as 92.7, so we select the method. The result is value innovation type In addition, the authors try to calculate the environmental burden in selection process using LCA. We cannot conduct the full LCA as defined ISO, so perform Simple LCA In LCA result, the cut-off grouting has the least environmental burden as index 9.09E+01 and Water Jet method has following as the second. To selection best method to specific area and purpose, design VE/LCG process used as useful tool and it is needed to develop integrated method that evaluate VEILCC and LCA as one-set process.

• The Journal of Korean Medicine
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• v.38 no.3
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• pp.103-110
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• 2017

Objectives: The purpose of this study was to examine trends in duplicate publication in Korean medical articles indexed in the Oriental Medicine Advanced Searching Integrated System(OASIS). Methods: We searched the list of papers published in Korean medical journals by using OASIS. We randomly extracted 10% of total articles (n=1,162). We searched using OASIS by entering keywords from the title and names of the first and last authors of each indexed article. After the librarian selected the candidates of duplicate publication, three authors reviewed the full texts of the articles independently. When their opinions were not in agreement, reconciliation was made by discussion. The patterns of duplicate publication, such as copy, salami slicing (fragmentation), and aggregation (imalas), were also determined. Results: A total of 1162 articles were evaluated, 24 (2.1%) index articles of which were duplicate articles. Among 24 index articles, Two were triple publications and 22 were double publications. The patterns of duplication publication were as follows; (1) copy (n=8, 33.3%); (2) salami (9, 37.5%), (3) imalas (5, 20.8%) (4) others (2, 8.3%). Conclusion: Duplicate publications have appeared in Korean medical journals in a small proportion. Education on publication ethics and authors'ethical awareness is needed.

• Journal of the Korea Institute of Building Construction
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• v.14 no.3
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• pp.195-206
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• 2014

The main issue of defect dispute is consulting, reviewing, and finally judging as an arbiter. A defect consulting is represented a defect consulting report, but a business custom and a standard of judgment are different each consultants, and have many problems. This study reviews literature studies and institutional researches, set up a research structure. it has 7 indexes that 5 indexes are formal indexes, and the other are qualitative indexed. As a result of case study, formal indexes are respect on the whole. However, each appraiser has different ideas, and, is expected to delay on fixing a construction lawsuit practice. This study suggests to improve a defect consulting report, it is followed. In formal part, suggested to change configuration is adjusted and integrated similar items. In qualitative part, an evaluation system for appraiser and an education program for engineers is suggested.

• Journal of the Korean Dietetic Association
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• v.26 no.3
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• pp.221-233
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• 2020

The Center for Children's Foodservice Management periodically visited children's foodservice facilities for hygiene, safety and nutrition management, and the 'HSQ (Hygiene Safety Quotient) and NQ (Nutrition Quotient) Management Web & App Program' was developed and applied to improve the health, safety, and nutrition management status of children's foodservice facilities. The HSQ is a comprehensive hygiene and safety index consisting of six categories from the hygiene and safety checklist for children's foodservice facilities provided by the Ministry of Food and Drug Safety. The NQ is a nutrition index for foodservice facilities consisting of five categories from the nutrition checklist. First, this program can be used to efficiently understand the actual conditions of children's foodservice. Foodservice facilities are provided with the result report prepared by the center without restrictions on time or place. Second, it can be used as "a channel for comfortable communication with foodservice facilities". Foodservice facilities are provided with a route where questions and resolutions can be communicated to the center. Third, it is easy to compare and review the results of foodservice facilities by institution and number of visits while downloading the results data at the same time, as the result report is written based on hygiene, safety, and nutrition visits. Through such programs, it is believed that standardized work and integrated management will improve the work efficiency of the center's employees. It is also thought that these programs will promote healthier life-styles in children by establishing a safe food environment for children's foodservice.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.693-701
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• 2020

In this paper, SQL statements are analyzed to improve database performance in the current course registration system. The performance of the current database was measured through the execution plan of the SQL statements used in the transactions related to the course registration. Through the SQL analysis, the complemented SQL statements confirmed the improved performance. Overall, the performance of the course registration database system was improved through the analysis of the execution plan, and some improvement methods of the course registration SQL were shown as test results. The improved method is to reorganize the tables and index tables related to the course registration through database tuning, and utilize the SQL function to implement an optimized system that has evolved into a course database system with improved performance. The enrollment system re-adjusted by the proposed method showed excellent results in terms of performance compared to the previous enrollment system, and the integrated performance test result reduced the response time by 1.8 to 18 times.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.865-869
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• 2010

건전한 물순환체계 구축을 위해서는 물이용, 치수, 하천환경 등 각 분야별 평가뿐만 아니라 수자원 현황을 평가할 수 있는 통합지수 개발이 절실히 요구되고 있다. 외국의 사례에서도 찾아볼 수 있듯이 현재 국외에서는 지표 및 지수개발을 통해 수자원 관련 현황과 정책의 방향성 및 사업의 성과 등을 평가하려는 노력이 지속되고 있다. 또한 국제기구에서는 세계 각국의 관련 자료를 수집, 분석하고 이를 지표 및 지수화하여 각국의 순위를 매김으로써 각 나라의 현주소를 제시하고 있다. 이에 대해 최근 들어 국제기구에서는 우리나라의 물 관련 현황에 대한 자료 및 통계치를 요구하는 사례가 늘어나고 있다. 따라서 우리나라의 수자원 관련 자료를 조사, 수집하고 분석한 올바른 정보를 제공함으로써 보다 합리적인 분석을 수행할 수 있도록 지원해야 한다. 본 연구에서는 국내 수자원 현황과 사업의 효과를 평가하기 위해 물이용의 취약정도를 평가하는 물이용 취약지수와 홍수 위험도를 평가하는 홍수위험지수 및 하천환경 취약정도를 평가하는 하천환경취약지수로 구성된 물행복지수(Water Happiness Index : WHI)를 개발하였다. 개발된 물행복지수를 통해 각 중권역에 대해 지수 값을 산정하여 비교 분석함으로써 수자원 현황을 시 공간적으로 분석하였다. 물행복지수는 여러 가지 기초정보만으로는 판단하기 어려운 수자원 현황 및 변화를 하나의 수치로 판단할 수 있는 척도를 제공할 수 있으며 연도별 분석을 통해 수자원 현황 및 특성 변화를 파악할 수 있어 수자원 관련 정책 수립 시 각 지역의 과거에서부터 현재까지의 연도별 수자원 특성을 반영한 대책을 세우는 데 유용하게 이용될 것으로 판단된다. 또한 국가 수자원 정책과 사업성과에 대한 평가가 가능할 것이며 수자원 정책 수립 지원을 위한 기반 정보를 제공할 것으로 기대된다.