• Nuclear Engineering and Technology
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• v.54 no.9
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• pp.3242-3249
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• 2022

As Kori unit 1 is undergoing the decommissioning process, estimating the disposal amount of waste from the decommissioned nuclear reactor has become one of the challenging issues. Since the waste disposal amount estimation depends on the packing of the waste, it is highly desirable to optimize the waste packing plan. In this study, we developed an efficient scheme for packing waste component segments. The scheme consists of 1) preparing three-dimensional models of segments, 2) orienting each segment in such a way to minimize the bounding box volume, and 3) applying hybrid genetic algorithm to pack the segments in the disposal containers. When the packing solution converges in the algorithm, it comes up with the number of containers used and the placement of segments in each container. The scheme was applied to Kori-1 reactor pressure vessel. The required number of containers calculated by the developed scheme was 24 compared to 42 that was the estimation of the prior packing plan, resulting in disposal volume savings by more than 40%. The developed method is flexible for applications to various packing problems with waste segments from different cutting options and different sizes of containers.

• Korean Journal of Agricultural Science
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• v.48 no.4
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• pp.729-738
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• 2021

The purpose of this study was to suggest an improvement plan ultimately to develop practical evaluation methods for national technical qualifications in the field of seeds and horticulture based on the National Competency Standards. Through this, national technical qualifications can be strengthened in terms of professionalism in the seeds and horticulture field. In order to conduct this study, the national technical qualification currently in use was matched to certain competency units and competency unit elements of National Competency Standards. We then visited an industrial site to understand the practical factors related to the technical, facility and equipment aspects of the seeds and horticulture industrial field, after which a practical evaluation exam was developed. Also, for a feasibility study, a pilot test assessment was conducted for students majoring in seeds and horticulture, with a survey also conducted with field experts and an advisory committee consisting of experts in seeds and horticulture. Based on the results, by suggesting an improvement plan for a practical evaluation method leading to better national technical qualifications in the field of seeds and horticulture, it was shown to be possible to improve knowledge, technical, and literacy aspects. This can lead to the training of outstanding technical professionals. Ultimately, the results here are expected to contribute to the improvement of the seeds and horticulture industry.

• The Southeast Asian review
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• v.22 no.1
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• pp.207-245
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• 2012

With rapid industrialization and urbanization, numerous cities are faced with urban slum phenomenon combined with housing shortage fueled by population explosion. In Kuala Lumpur, the capital city of Malaysia, the government hereby embarked on supply of public housing to resolve such pending issue. This study aims to understand the periodic changes of public housing as a common basis for basic housing policies with analysis specific features of site plan, block layout, and unit plans. For this purposes, the filed survey during January, 2011 were proceeded. We hereby visited and surveyed a total of 40 apartment complexes for the 1970s~the 2000s (10 complexes respectively on a decade basis). Consequently, Malaysian public apartments prove to offer a very uniform pattern based upon standard plans. Their early plans aren't fairly distincted from those of other countries, but their layouts of plan become differentiated compared with other nations as they actively apply a ventilator called 'air well' in response to tropical climate amid the change of times. This study is expected to broaden our understanding of Malaysia's unique housing culture and lifestyle.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2004.11a
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• pp.75-77
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• 2004

Stereotactic radiosurgery(SRS) is a technique to deliver a high dose to a particular target region and a low dose to the critical organ using only one or a few irradiations while the patient is fixed with a stereotactic frame. The optimized plan is decided by repetitive work to combine the beam parameters and identify prescribed doses level in a tumor, which is usually called a trial and error method. This requires a great deal of time, effort, and experience. Therefore, we developed the automatic arrangement of multi-isocenter within irregularly shaped tumor. At the arbitrary targets, which is this method based on the voxel unit of the space, well satisfies the dose conformity and dose homogeneity to the targets relative to the RTOG radiosurgery plan guidelines

• Land and Housing Review
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• v.12 no.3
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• pp.67-78
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• 2021

After World War II, modular housing was developed as a means of quickly and efficiently meeting the housing supply demand. For the past 30 plus years, efforts have been made to improve modular housing in South Korea and to increase their competitiveness in the housing market. This study investigated modular houses based on a steel framed rahem structure which provides a flexible floor plan where walls are easily reconfigured to create rooms of various sizes and functions. Similar to the factory production methods used in the automotive industry, the modular housing industry can also benefit by standardizing such aspects as building components, manufacturing and construction methods, materials, process management, and floor plans. This study examined the feasibility of using a 3m × 3m module for developing various floor plans which are easy to produce and transport. Each 3m × 3m module can be configured to meet different living needs resulting in a complete home when multiple modules are connected. The module configurations can be varied to meet ground transportation and crane limitations. This study found that a 3m × 3m steel framed modular unit is a promising step towards providing residents with plans that meet their living preferences while improving and increasing the supply of modular houses.

• Journal of the Korean housing association
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• v.20 no.1
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• pp.83-90
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• 2009

The present study is a preliminary research improving the dwelling quality of apartment house as a kind of multi-family housing. The purpose of the study is to find out the actual state on characteristics of indoor noise including residents' living in apartment units. The method was field survey consisted of field measurements on equivalent noise level, observation on noise type, and interview on residents' responses. Field survey were carried out in 20 occupied apartment units from January to March 2007. The results are as follows. 1) Averages of indoor noise levels including residents' living noise were measured as $43.9{\sim}62.2\;dB(A)_{Leq5min}$, the average of each house except one was higher than the permissible level, 45 dB(A). 2) The noise types observed were mostly residents' living noise and classified into 'water hammer', 'living equipment noise', 'noise by family', 'hood noise', 'kitchen noise' in own unit, 'walking and talking noise in stairs and corridors', 'noise by neighborhood house', 'noise by the upper story' in building, and outdoor noise. 3) The residents showed slightly non-positive responses at 'noise by the upper story', 'noise by neighborhood house', 'water hammer', and 'noise by family'. Therefore, it is required to plan for preventing deterioration of the dwelling quality by residents' living noise in own unit as well as by neighborhood houses.

• Journal of the Korean housing association
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• v.22 no.5
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• pp.59-69
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• 2011

The purpose of the study was to perform the post-occupancy evaluation of housing environments of Jangyou New Town in Gimhae. The data for the analysis was collected through questionnaire survey method from August 10 to 27, 2010, and the sample consisted of 524 respondents living in apartment complexes in Jangyou. The features of housing environment were categorized into unit housing, apartment complex, and neighborhood and total 28 specific items were included in the evaluation. The data were analyzed using descriptive statistics and analysis of variance with Duncan's multiple range tests. The results were as follows: 1) Overall evaluation of housing environment of the residents in Jangyou were relatively high, expecially in floor plan layout of unit housing, self-expression through apartment complex, and natural environment of neighborhood. 2) The demographic and housing variables that had significant influences on the post-occupancy evaluation were age of the respondent, monthly income, apartment size and tenure type of apartment. Respondents who were over sixty years old, with monthly income of less than 2,000,000 won, or living in public rental apartments were more likely to evaluate overall housing environment positively than rest of the respondents.

• Journal of the Korean housing association
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• v.21 no.2
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• pp.11-18
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• 2010

The purpose of this study is to analyze the exterior space designs of housing complexes where landscape view corridors were planned. In addition, the purpose of the study is to propose reference data for planning and designing a new landscape view corridor. The process of this study is as follows: (1) To understand the role of the landscape view corridor, this study investigated cases of district unit plans and classified the landscape view corridors in terms of the types of functions. (2) To extract analysis items on the exterior space design of housing complexes where landscape view corridors were planned, this study investigated guidelines to be set up for the design of landscape view corridors and the present state of the condition of landscape view corridors. (3) This study analyzed the relationship between the landscape view corridor and the courtyard, the roadway and convenience facilities of the housing complex. This study also proposed reference data for planning a new landscape view corridor and designing the exterior space of a new housing complex.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.450-453
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• 2003

It is very important to examine and compare initial plan with earned value repeatedly in construction. For this purpose, progress measurement, which reflects the actual progress correctly, is required and it is necessary that accurate field data should be offered. To measure the progress, the entire project mutt be divided into unit works that have an accurate scope of work, and required information must be distributed to the all parties. Under the circumstances of domestic construction industry which focus on the specifications, progress measurement needs to reflect the information of schedule as well as cost that includes the quantity of unit work and construction expenses. Therefore this research proposes weighted method of progress measurement based on the information of cost and schedule.

• The Journal of the Korea institute of electronic communication sciences
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• v.3 no.2
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• pp.118-128
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• 2008

Currently analyzed the various real estate electronic transaction relation service present condition which is enforced from the government offices. And applied a real estate electronic transaction and enforces and the representative instance which selected analyzed. Analysis leads, groped the constituent unit by construction plan of real estate electronic transaction system of governmental leading and unit system construction investigated a priority. And delivered Real Estate Contents Information in DRM Serever for authentication, decoding, and license downloading for cases of charged contents. This can retain the merits of P2P technology to its full extent while solving the biggest issue addressed: copyright problems.