• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.649-655
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• 2020

This study determined effective educational strategies by investigating and analyzing the related educational demands for SMEs (small and medium-sized enterprises) in the 4th Industrial Revolution based area of smart farms. In order to derive the approprate educational strategies, Importance-Performance Analysis (IPA) and Borich's Needs Assessment Model were conducted based on the smart farm technological field. As a result, the education demand survey showed high demand for production systems and intelligent farm machinery. In detail, Borich's analysis showed the need for pest prevention and diagnosis technology (8.03), network and analysis SW linkage technology (7.83), and intelligent farm worker-agricultural power system-electric energy hybrid technology (7.43). In contrast, smart plant factories (4.09), lighting technology for growth control (4.46) and structure construction technology (4.62) showed low demands. Based on this, the IPA portfolio shows that the network and analysis SW linkage technology and the CAN-based complex center are urgently needed. However, the technology that has already been developed, such as smart factory platform development, growth control lighting technology and structure construction technology, was oversized. Based on these results, it is possible to strategically suggest the customized training programs for industrial sectors of SMEs that reflect the needs for efficiently operating smart farms. This study also provides effective ways to operate the relevant training programs.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.246-251
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• 2016

The use of security lighting that emits spill light is considered a cause of light trespass problems in the residential areas. Therefore, a cutoff panel was installed as an alternative way to reduce light trespass. On the other hand, it has another problem in that it is less effective and is not good enough for aesthetics and safety. In this study, a light cutoff panel was designed and manufactured to reduce the light trespass, and the structure of a proper light cutoff panel was studied. Using a goniophotometer, the light distribution file (IES file) was extracted and the characteristics of light distribution were analyzed using the RELUX program. The results showed that the reduction of spilt light in the backward direction was decreased significantly for all types of light cutoff panels except the coated globe. In the case of a black powder coated light cutoff panel, the forward light caused by light reflected from the surface of the light cutoff panel was also reduced, which means that the black powder coated light cutoff panel is effective in the performance of light cutoff in the forward and backward directions. In addition, the coated glove increased the spilt light in the forward and backward directions because it reflects the upward light to go down. A 90 % accuracy between the measurement value of light trespass and the expected value of the light trespass was obtained from a simulation.

• Smart Media Journal
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• v.4 no.4
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• pp.120-129
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• 2015

Explosion effect on CG (Computer Graphic) a visual effect on which a higher degree of technological difficulty is required with a variety of effect elements such as Fire, Smoke, Flame, Dust, Debris, etc. integrated on it. As skills for CG software have been advanced, solutions loaded with functions of various fluid simulation have been developed. So more realistic special effects came to be available. However, in Korea, it depends just on CG program functions. Besides, enough R&D's concerned have not been followed up. Accordingly, this study is aimed at offering a production method that may effectively implement more realistic explosion effects under experimentations. To begin with, the study derives problems through a precedent study of the implementation of existing explosion effects. Then to solve them, experimental studies are performed depending on four solutions. There are accesses to the four solutions: first, Numerous Turbulent Flow, a method to allow an attribute of turbulent air in the stage of fluid simulation; second, Cache Retiming Solution produced in script; third, Multiple Volume Container based on cached data; and fourth, RGB Lighting Pipeline, a method to enhance the completion of the result from the stage of composition. Characteristics of effects applied in each stage and consecutive connections of them proved the effective implementation of more realistic explosion effects. This study may not only suppose the production method for efficient explosion effects differentiated from the previous ones but also be utilized as basic data for relevant researches.

• Korean Journal of Materials Research
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• v.29 no.7
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• pp.437-442
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• 2019

Green $BaSi_2O_2N_2:0.02Eu^{2+}$ phosphor is synthesized through a two-step solid state reaction method. The first firing is for crystallization, and the second firing is for reduction of $Eu^{3+}$ into $Eu^{2+}$ and growth of crystal grains. By thermal analysis, the three-time endothermic reaction is confirmed: pyrolysis reaction of $BaCO_3$ at $900^{\circ}C$ and phase transitions at $1,300^{\circ}C$ and $1,400^{\circ}C$. By structural analysis, it is confirmed that single phase [$BaSi_2O_2N_2$] is obtained with Cmcm space group of orthorhombic structure. After the first firing the morphology is rod-like type and, after the second firing, the morphology becomes round. Our phosphor shows a green emission with a peak position of 495 nm and a peak width of 32 nm due to the $4f^65d^1{\rightarrow}4f^7$ transition of $Eu^{2+}$ ion. An LED package (chip size $5.6{\times}3.0mm$) is fabricated with a mixture of our green $BaSi_2O_2N_2$, and yellow $Y_3Al_5O_{12}$ and red $Sr_2Si_5N_8$ phosphors. The color rendering index (90) is higher than that of the mixture without our green phosphor (82), which indicates that this is an excellent green candidate for white LEDs with a deluxe color rendering index.

• Korean Journal of Human Ecology
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• v.20 no.1
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• pp.257-271
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• 2011

The purpose of this study is to provide basic data that is necessary for planning an adequate environment for various child-care activities and programs by recognizing the environmental characteristics of a group room, where children's activities take place. A survey was conducted of 257 childcare centers and 544 teachers all over the country, including only those of which that have opened after year 2000 with more than 20 children capacities. The survey period was from January 18th to 28th of 2010. The data was analyzed using SPSS WIN 15 software, calculating the data's frequency, percentage, $x^2$, multiple response analysis, F-test, and factor analysis. The results of this study led us to the following conclusions. 1) We would like to propose a group room space design varying by the room size, so that interesting and diverse activities can take place after taking account of the child's development and childcare centers program. 2) Group room space and facilities should be made of proper finishing materials, various materials with differing textures, and lighting for the kinds of childcare activities that gives various sensational experiences and comfortable feelings to the children. 3) Teachers with higher age and education tend to believe that child's competence and a homelike atmosphere are important factors in a group room environment.

• Korean Institute of Interior Design Journal
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• v.14 no.6 s.53
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• pp.140-147
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• 2005

For a safe and stable supply of blood in Korea, 'Blood Donation Houses' are springing up all over Korea to advertise and improve the awareness on blood donations. This research will conduct a study on such blood donation centers, their conditions and problems. It will furthermore provide solutions to raise the level of comfort to donators and help nurses for a better working environment. The research will be conducted in 'Blood Donation Houses' that were established by 4 centers of the Korean Red Cross in Seoul after 1993. Any houses that are temporary (containers, buses, smaller than 15 pyung) were excluded from this study. In order to investigate changes of these houses, the ones analyzed and recorded in the 2002 data were used as a basis for comparison. A total of 16 houses were selected for this study. 5 houses were closed after the initial study of 2002, and 6 houses were not available for research upon above mentioned criteria, leaving 9 houses from the original 2002 data. 7 additional houses were opened after 2002, which were included in this study. The research was conducted by a close study of written materials on the historical and theoretical viewpoint of blood donations, as well as visits to the actual Blood Donation Houses. The conclusion will offer solutions to necessary functional and working space, and lighting in such houses on the basis of above analyzed theoretical and practical data.

• Korean Institute of Interior Design Journal
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• v.22 no.2
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• pp.149-156
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• 2013

Men should be able to do whatever they want to and want to safely protected at home which is special domain for them. The disabled live mentally uncomfortable lives at home which should be a place where they should be comfortable and convenient. Renovation projects started in Incheon since 2009 by commencing renovation projects for the disabled by the government and welfare centers. Since the project is a program supported by the government or welfare centers thus priority on renovation was decided and carried out by in-depth interview to decide areas to renovate because of limited budgets. This paper is aimed to propose plans for renovating homes according to priority for renovation for dwellers when renovating homes for the disabled with limited budgets. Renovating home for the disabled can be broadly divided into physical, environmental, esthetic renovations, and physical renovation is a basic renovation for daily lives without restrictions in living and include easy movements, accesses to each rooms and adequacy of movement, easily accesses related with easily accessible distance and height, safety to prevent accidents caused by physical inabilities. Environmental renovation is general supports becoming the base of daily living and include control for controlling lighting, heating, air quality for comfortable environments in living space and pleasantness to maintain bright and pleasant interior with sufficient light. Esthetic renovation includes expression of identity by expressing image of one self and visual effects or spatial consideration for hobbies to enjoy comfortable and rich lives.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.3
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• pp.1-10
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• 2007

As one of the important metropolitan cities in Asia, Seoul shows vibrant atmosphere in the night as well as daytime. Colorful signboards and outdoor lightings are consists of major night elements. In this research, nightscapes of four major streets in Seoul are photographed to analyze the image of Seoul at night. After preparing of slides, questionnaire survey is conducted to study people's subjective responses on the images of streets at night. After survey, SPSS 10.0 statistical program was used to analyze the results of subjective responses on the nightscapes in Seoul. According to the result, night streetscape 4(showing and business district)shows vibrant and interesting image. Meanwhile, streetscape 1(high-rise with exterior lighting in showing district)shows beautiful and harmonious image. Major factor's are named as 'harmonious' and 'vibrant'. Variable 'arranged' shows the highest coefficient to the variable 'harmonious'. Every variables except the variable 'warm' shows significant difference among the mean values of each variables.

• Journal of Advanced Navigation Technology
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• v.19 no.5
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• pp.379-388
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• 2015

In the end of 1990's, future free flight technology had been developed and tested in America and government established the plan for free flight until 2017. Aircraft separation assurance must be secured essentially to avoid collision between aircrafts before Free Flight comes true. Now, Civil aircraft has rules about avoidance activity with traffic collision avoidance system (TCAS) but it can't apply to light aircraft. So there is a need about alternative method to apply light-aircraft because it has space and price problem to use TCAS. In this paper, TCAS algorithm has been modified and verified by simulating with LABVIEW program under ADS-B condition to get miniaturization and weight lighting cheaply. By simulating, collision alert algorithm is analyzed and verified with collision situation proposed by ICAO, and 100% checked for performing the alert announciation on all cases by TCAS standards.

• Journal of the Korea Computer Graphics Society
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• v.21 no.3
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• pp.36-45
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• 2015

It is important subject of research in engineering and natural science field that creating continuing high-definition image from very large volume data. The necessity of software that helps analyze useful information in data has improved by effectively showing visual image information of high resolution data with visualization technique. In this paper, we designed multi-platform visualization system based on client-server to analyze and express earth environment data effectively constructed with observation and prediction. The visualization server comprised of cluster transfers data to clients through parallel/distributed computing, and the client is developed to be operated in various platform and visualize data. In addition, we aim user-friendly program through multi-touch, sensor and have made realistic simulation image with image-based lighting technique.