• Nuclear Engineering and Technology
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• v.54 no.4
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• pp.1414-1420
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• 2022

High dose rate (HDR) brachytherapy treatment planning usually involves optimization methods to deliver uniform dose to the target volume and minimize dose to the healthy tissues. Four optimizations were used to evaluate the high-risk clinical target volume (HRCTV) coverage and organ at risk (OAR). Dose-volume histogram (DVH) and dosimetric parameters were analyzed and evaluated. Better coverage was achieved with PGO (mean CI = 0.95), but there were no significant mean CI differences than GrO (p = 0.03322). Mean EQD₂ doses to HRCTV (D₉₀) were also superior for PGO with no significant mean EQD₂ doses than GrO (p = 0.9410). The mean EQD₂ doses to bladder, rectum, and sigmoid were significantly higher for NO plan than PO, GrO, and PGO. PO significantly reduced the mean EQD₂ doses to bladder, rectum, and sigmoid but compromising the conformity index to HRCTV. PGO was superior in conformity index (CI) and mean EQD₂ doses to HRCTV compared with the GrO plan but not statistically significant. The mean EQD₂ doses to the rectum by PGO plan slightly exceeded the limit from ABS recommendation (mean EQD₂ dose = 78.08 Gy EQD₂). However, PGO can shorten the treatment planning process without compromising the CI and keeping the OARs dose below the tolerance limit.

• Journal of the Korean Society of Industry Convergence
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• v.14 no.4
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• pp.157-165
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• 2011

The study figures out the alternatives of training BIM design experts which is the biggest obstacle in training manpower of professional BIM designer, the largest problem when the plant introduce BIM design about the change in Construction Environment by Equipment Based BIM Design in reality of design followed by equipment based BIM design, education institution plan. BIM is the system which is built to make these information be used easier and technique which enables design construction and maintenance in 3-dimensional virtual space by designing buildings in 3-dimensional space, and by data-basing the generated information of every life-cycle information. As the essential contents of the study, educational institutions with the public authority should invest the opening of educational programs, recruit of experts and development of textbooks from a long-term perspective. And also, the role of public institution is important above all for the development of construction industry.

• Korean Journal of Mathematics
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• v.19 no.4
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• pp.453-464
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• 2011

We used SAS program in statistics class as a plan to increase effect of class. Because lease cost of SAS program is high and low-level students felt difficulty of the syntax of SAS program, I planned to introduce other instruction-software. We observe whether it's O.K. to use Excel instead of SAS program and Excel is helpful in having positive attitudes. We try to compare and analyze the merits of two programs. The purpose of this study is to apply Excel to statistics class, cut down the cost of instruction-software, and make students understand statistics more conveniently and easily.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.1363-1366
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• 2005

대학 정보시스템 분류를 기존의 통합성과 커스터마이징으로 분류하는 것을 현 실정에 맞게 현재의 정보화율을 고려한 어플리케이션 분류를 시도하였다. 전국 대학을 대상으로 실시한 설문조사를 통해 각 시스템의 통합성과 커스터마이징을 조사하여 ‘복잡도’라는 하나의 변수로 설정하였다. 대학에서 정보화가 가능한 모든 시스템에 대해 현재의 정보화율과 복잡도를 고려하여 대학 정보시스템을 분류하였다. 이 분류를 기준으로 ASP 방식을 도입하는 방안(로드맵)을 제시하였다. 분류 모델에 정보화율을 도입함으로써 현재의 상황을 고려한 어플리케이션 분류 모델을 제시하였다. 이 분류 모델은 각 분야에 있어 정보화율에 따른 단계적 ASP 도입 방안 마련에 기초적 기준이 될 것이다.

• Journal of the Korean Institute of Educational Facilities
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• v.16 no.2
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• pp.47-58
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• 2009

Biotope area rate and ecological environment planning for school campuses are closely related, and we can say that ecological environment of a school that has high biotope area rate is of high ecological value. Taking that into account, in this paper, we are going to have a look at the relationship between the elements of ecological environment plan for environment-friendly schools and the biotope area rate, and we are going to come up with a method how we can increase ecological value of ecological environment and biotope area rate in a school campus through analyzing the actual biotope area rate of certified environmental-friendly schools.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.34 no.4
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• pp.89-97
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• 2011

Traditional quality control for manufacturing or service sector is not suitable for the quality control of a project as the project is one-time task constrained by time, cost, and quality. To meet the internal and external customers' requirements, quality costs approach to the project will be effective. Hence, we propose PONC (price of nonconformance) estimation procedure and a mathematical model, which are focused on activity-based prevention in the execution step and warranty step of EPLC (extended project life cycle). This procedure and model will help project manager develop preventive action plan for project quality costs minimization from nonconformance risk activities and PONC estimates information.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.5 no.4
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• pp.340-344
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• 2004

In this paper, We collected the data of communication network construction in Sangmyeong University and analyzed them. Moreover using the analysis instrument of communication network traffic, We tested a process of it, and an efficiency of each equipment. We proved the traffic flow and the load quantity during the register for class. As a result We suggested a efficient communication network design - add and change some equipments in order to break up the traffic.

• Proceedings of the KAIS Fall Conference
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• 2004.06a
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• pp.185-188
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• 2004

본 논문에서는 상명대학교 통신망 구성과 그 현황 자료를 수집하여 분석하였고, 통신망 트래픽 측정 분석도구를 이용하여 통신망의 트래픽 흐름과 각 장비들의 동작방식과 성능을 측정하였다. 수강신청기간에 트래픽 흐름과 부하량에 대해 성능평가를 하였으며, 몇몇의 장비들을 추가/변경하여 트래픽을 분산시키는 방안을 제안하여 효율적인 통신망 설계 방안을 제시하였다.

• ETRI Journal
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• v.42 no.5
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• pp.669-685
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• 2020

5G AgiLe and fLexible integration of SaTellite And cellulaR (5G-ALLSTAR) is a Korea-Europe (KR-EU) collaborative project for developing multi-connectivity (MC) technologies that integrate cellular and satellite networks to provide seamless, reliable, and ubiquitous broadband communication services and improve service continuity for 5G and beyond. The main scope of this project entails the prototype development of a millimeter-wave 5G New Radio (NR)-based cellular system, an investigation of the feasibility of an NR-based satellite system and its integration with cellular systems, and a study of spectrum sharing and interference management techniques for MC. This article reviews recent research activities and presents preliminary results and a plan for the proof of concept (PoC) of three representative use cases (UCs) and one joint KR-EU UC. The feasibility of each UC and superiority of the developed technologies will be validated with key performance indicators using corresponding PoC platforms. The final achievements of the project are expected to eventually contribute to the technical evolution of 5G, which will pave the road for next-generation communications.

• Archives of design research
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• v.17 no.1
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• pp.5-14
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• 2004

The study addressed a direction that environmental facilities along avenues will make a progress via urban environment as well as location marketing. The space is specified the campus avenue, which is located in Jongro-gu at Seoul. With the emergence of digital information era, both people' life style and behaviors have been changing in many different ways. As the first approach to the direction, the historical study of the avenue is examined by focusing on the change. All possible related status such as location marketing strategy and various spatial characteristics, environment of the avenue and its facilities are investigated and users' characteristics are analyzed. Through these processes, a new direction and role of design are proposed and are believed to improve the avenue' image and to rediscover its own identity and to make the avenue alive as it used to be. The new proposed direction showed how to approach to design as well as to system of environmental facilities along avenues and in addition to highlighting continuous and synthetic plan. Furthermore, It is expected that both the efforts to improve the avenue' image based on its own cultural characteristic and to foster the cultural-commercialized facilities will contribute to the local residents' life standard and its economic status.