• Progress in Medical Physics
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• v.30 no.4
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• pp.128-138
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• 2019

Purpose: Segmental analysis of volumetric modulated arc therapy (VMAT) is not clinically used for compositional error source evaluation. Instead, dose verification is routinely used for plan-specific quality assurance (QA). While this approach identifies the resultant error, it does not specify which machine parameter was responsible for the error. In this research study, we adopted an approach for the segmental analysis of VMAT as a part of machine QA of linear accelerator (LINAC). Methods: Two portal dose QA plans were generated for VMAT QA: a) for full arc and b) for the arc, which was segmented in 12 subsegments. We investigated the multileaf collimator (MLC) position and dosimetric accuracy in the full and segmented arc delivery schemes. A MATLAB program was used to calculate the MLC position error from the data in the dynalog file. The Gamma passing rate (GPR) and the measured to planned dose difference (DD) in each pixel of the electronic portal imaging device was the measurement for dosimetric accuracy. The eclipse treatment planning system and a MATLAB program were used to calculate the dosimetric accuracy. Results: The maximum root-mean-square error of the MLC positions were <1 mm. The GPR was within the range of 98%-99.7% and was similar in both types of VMAT delivery. In general, the DD was <5 calibration units in both full arcs. A similar DD distribution was found for continuous arc and segmented arcs sums. Exceedingly high DD were not observed in any of the arc segment delivery schemes. The LINAC performance was acceptable regarding the execution of the VMAT QA plan. Conclusions: The segmental analysis proposed in this study is expected to be useful for the prediction of the delivery of the VMAT in relation to the gantry angle. We thus recommend the use of segmental analysis of VMAT as part of the regular QA.

• Spatial Information Research
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• v.10 no.1
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• pp.165-183
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• 2002

The master plan for the land management information system development was established in 1997 and demonstration projects were carried out in Nam-gu, Daegu Metropolis in 1998. As of the end of 2001, 12 project areas have completed installing the land management information system and are now utilizing it in operations or in trial operation and 88 areas are still under construction. Sixteen metropolises and provinces and 232 cities, counties and districts plan to complete the development of land management information system by 2004 and additionally Install a land information center to manage and maintain the land management information system. The land management information system was introduced as one of information technologies to solve the problems arising in the operations of land management and administration. It inevitably accompanies a radical change of working environment, from analogue to digital. It is obviously not a simple job and largely depends on how to entice the officials working in analogue settings into a digitalized world. Therefore, it is not too much to say that the success of the land management information system development project depends on how to rationally adapt the analogue land administrations to a digital environment.

• The Journal of the Korea Contents Association
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• v.10 no.2
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• pp.184-192
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• 2010

In the current so-called age of emotion marketing, the independent form of handwriting of calligraphy is being revitalized in various fields such as advertising, book designs, film titles, posters, packages, BI, and even fashion. Thus centered on Gyeyang-gu at the city of Incheon, 100 outdoors signs that used calligraphy were chosen and we researched a reform plan that could revitalize calligraphy in outdoor signs by classifying them according to current conditions of the use of calligraphy, actual conditions of practical use, expression tools, and analyzing the use of colors. The result was trial requests not only from the formalities industry, but also the financial sector, public corporations, and several other businesses, but in order to provide not only for franchise brand logotypes manufactured by expensive experts, but also provide production of high-quality calligraphy for low costs for small private enterprises, the development of a diverse calligraphy education program, centered on the regional society, will be needed. In the midst of globalization, in order to advertise the beauty of Korean alphabet and to create our own unique street culture, a variety of tools and tactile expressions are demanded, in the future the research on the calligraphy of outdoor signs must be revitalized.

• Journal of the Korean Institute of Landscape Architecture
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• v.29 no.1
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• pp.113-123
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• 2001

The purpose of this study is to help out the settlement of the Green Map in Korea, and to suggest how to map, and help community people and environmental planner systematically take care of their own towns. This study is also to introduce the green mapping and its usefulness, based on the Green Map Movement, which originated from Net York City and has been expanding through the World. Environmental elements shown on the Green map vary between countries and for the Seocho-Gu Green Map, we have decided to indicate the places that we are proud of, and dishonored of. Especially, this paper is focused on finding the hidden environmental resources in our daily lives. Seocho-Gu, one of 25 self-governmental resources. Since the citizens and government officials are open-minded in their environments, it is a suitable area to start the first Green Map in Korea. As a method of locating the environmental resources, the "Foot Sensing Method" by which residents directly research, is the main difference from typical maps by the "Remote Sensing" which focused on the variety participation of the residents such as questionnaires, investigation with youth volunteers, users interviews which may be more meaningful than the Green Map itself. The purpose of application plan is to preserve the environmental resources through the smooth feedback with the residents. Thus, it must be acted as a opening window linking them with the local circumstances. In line with this, this study proposed the trial-version Web Green Map and Green tour plan. Recently, a need for an environmental map has been reflected in the environmental policies of Seoul Metropolitan City, and it is in place now. If environmental experts of different disciplines use the Green Map for landscape architecture, design, and city planning, it will help them make a better understanding of the needs of the community and to practice the user-centered design. Eventually, the Seocho-Gu Green Map will help its residents, tourists, government, and environmental planners continue establishing the healthy city environments. It is expected that the green map will be employed as a useful method for establishing healthy city and town through right way of use and contents.of use and contents.

• Journal of Radiation Industry
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• v.8 no.3
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• pp.161-168
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• 2014

Increasing utilization of radiation and RI (Radioisotope) in nuclear industry including non-power area has achieved sustainable development of radiation industry. Industries are no longer confined by a single technology or abilities but expanded for application gradually. RI-Biomics fields are one of the convergence technology that is recognized on a high-tech industry. Unlike the conventional industry, RI-Biomics field needs to various specialists to perform related task. There is no domestic training program to educate the whole process. This study aims to suggest the plan for improvement of practical skills for specialists in RI-Biomics through development of our training program. For this purpose, we have first investigated the opinion about classification scheme from experts and then analyzed the results in order to reflecting our training program. Based on analyzed results, conformity assessment was executed to organize curriculum through status of constructed device and instructor in domestic. Our training program was performed jointly with KAERI (Korea Atomic Energy Research Institute). RI-Biomics center is prepared with facilities of overall experiment to improve quality of education. Due to the fact that specialists have routine task, we organized a five-day short course to reflect temporal difficulties. We performed a trial operation to 6 participants in RI-Biomics field. Through the survey for the specialists who participated in the program, we evaluated the efficiency of our training program. The results showed that participants were satisfied with the organized curriculum and educational materials. Therefore, our program is expected to be utilized as basic research data to develop feasible program for policy development and to improve practical skills in RI-Biomics.

• Korean Institute of Interior Design Journal
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• v.21 no.1
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• pp.248-257
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• 2012

The demand of elderly care facilities due to aging population has been increased and the trend of developed countries implies the necessity of innovate approach for elderly care in Korea. The purpose of this research is to evaluate the flexible elderly housing alternative which has been introduced showing adaptability and small scale. This elderly housing alternative was designed to fulfill the condition of residential facilities for various aging phases from the independent elderly to dependent elderly. The workshop method was used for pre-evaluation of the flexible elderly housing alternative from the viewpoint of administrators, care givers and the elderly. The pre-evaluation is to estimate the facility before finalizing the design so that it facilitates more effective and suitable plan by reducing the trial and error beforehand, unlike the post-evaluation. Major responses of plans were positive and the needs for improvement about some concerns were revealed. Thus, relevant aspects of architectural drawings were amended according to workshop participants' needs and features that require to be reflected during further planning procedures were also improved. The result of this research will develop the flexible elderly housing alternative and contribute to foster environment for the elderly as well.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.6
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• pp.7-13
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• 2015

The production processes were reviewed through the injection analysis of the shift lever as a core component of an auto lever installed in the automatic transmission of cars. The injection analysis was carried out for the shift lever and rod among the components in a shift lever module. The shift lever and rod are designed for injection molding with the insertion of a tube, a pin cable plate, and a steel rod for securing the strength of the product. The charging time, failure of injection molding, weld line, air trap, and deformation were reviewed according to this insert. Analyses on various gate positions were carried out for reviewing the cultivation and deformation of fiber around major components, such as the generation section of manipulation feeling and assembly section, so that optimal gate conditions might be reviewed and reflected in the mold design. Finally, we plan to compare the analysis results with the production of trial products.

• Journal of Engineering Education Research
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• v.14 no.2
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• pp.51-59
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• 2011

The wide range of the Freshmen English placement test scores implies the necessity of differentiating classes. However without a careful and detailed plan, there could be trial and error which would cause harmful and complicated troubles to students. This paper will report a case of grouping Freshmen for English classes at the Engineering College of a provincial university. The main procedures include preparing and executing the placement test, grouping classes, preparing and executing a common final test, preparing grading policy, and reporting. Each procedure is going to be explained and evaluated to improve the quality of English classes and the ability of students at the Engineering College.

• Knowledge Management Research
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• v.19 no.2
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• pp.47-68
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• 2018

Business environment is shifting from industrial economy to knowledge based economy. Enterprises go through numerous trials for successful management in changing environment. Along with trial tests, research area has been growing simultaneously. Unlike initial research which focused on basic concepts such as: form of business model and success points. Current research emphasizes on actualization of business that enterprises plan, which brought academic research with perplex form of knowledge structure. On the other hand, there is limitation in understanding business model systematically due to preceding research primarily centered on analyzing definition and case study. In order to analyze knowledge structure, this study utilized social network analysis based on "relationship". For the analysis, 13,412 keywords were extracted from 36years worth of article or research related to business model stored in SCOPUS database. From the analysis, it was shown core research subject was INNOVATION and the number of co-authors has increased due to the academic diversity. Business model research is divided into five sub-categories (E-commerce, SMEs, sustainability, open-source, and e-book). Through cognitive map analysis on each of research characteristics of sub-category, it has shown that E-commerce, SMEs, sustainability, and open-source are core categories.

• Journal of Korean Medical classics
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• v.23 no.4
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• pp.39-62
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• 2010

Background : I investigated clinical research methodology of Traditional Korean Medicine(TKM) for treatment of lung cancer with Evidence Based Medicine(EBM) approach. Methods : I conducted the internet search of National Central Library, the National Assembly Library, Korea Education & Research Information Service, Korea Institute of Science and Technology Information for Korean theses and papers, and MEDLINE for the outside articles. Conclusion : In addition to outcomes of clinical trial, abundant clinician's experience and patients' preference are also considered. Pragmatic trials and quasi-experimental trials are better than clinical trials to plan clinical design of TKM for lung cancer and appropriate endpoints includes overall survival, disease-free survival, patient reporting outcome.