• Journal of the Korean Institute of Educational Facilities
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• v.5 no.2
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• pp.57-66
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• 1998

The present, there are no evident standards about facilities of minimum-sized kindergarten and lower grades elementary school. So, there are many serious obstacles that related laws and regulations, planning for facilities and scales in this country. Accordingly, this study proposed the concept, type, and size of minimum-sized kindergarten and lower grades elementary school, in case big cities of high density. 1. The concept of minimum-sized kindergarten and lower grades elementary school is defined to the large scale school and class, that integration of children of kindergarten into lower grades elementary school. 2. The type of minimum-sized kindergarten and lower grades elementary school is classified into branch school type and detached school type. The former is located in the main elementary school, The latter is separated from the main elementary school. And each type is classified into singleness case and attached case. 3. The number of students per minimum-sized kindergarten and lower grades elementary school is hold from two hundred children to three hundred children in 12 classes, but suitability is from one hundred to two hundred children. And class sizes proposed $20{\sim}25$ children in minimum-sized kindergarten and $25{\sim}30$ children in lower grades elementary school.

• JSTS:Journal of Semiconductor Technology and Science
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• v.4 no.4
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• pp.258-262
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• 2004

Storage over Ethernet (SoE) is a network storage architecture that allows direct attachment of existing ATA/ATAPI devices to Ethernet without a separate server. Unlike SAN, no server computer intervenes between the storage and the client hosts. We propose a SoE disk controller (SoEDC) amenable to low-cost, single-chip implementation that processes a simplified L3/L4 protocol and converts commands between Ethernet and ATA/ATAPI, while the rest of the complex tasks are performed by the remote hosts. Thanks to simple architecture and protocol, the SoEDC implemented on a single $4mm{\times}4mm$ chip in 0.18um CMOS technology achieves maximum throughput of 55MB/s on Gigabit Ethernet, which is comparable to that of a high-performance disk storage locally attached to a host computer.

• Research in Mathematical Education
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• v.13 no.1
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• pp.1-4
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• 2009

We are considering the discovery and the promotion of the talent from the viewpoint of education of talented children. The education that develops the talent is from "Individual needs for all children." Computer Algebra System (CAS) can be used as a new possibility in the education that develops the talent. We will need to take advantage of the research results from cognitive science. In order to fully utilize CASs in education, teaching methods that are based on cognitive science will be needed, and these are clearly different from those used in paper and pencil teaching.

• Current Optics and Photonics
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• v.7 no.2
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• pp.191-199
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• 2023

We propose a dual Fabry-Perot interferometer (DFPI) structure that combines two Fabry-Perot interferometers. The structure is designed to have spectral peaks in the red, green, and blue regions simultaneously, to be applicable to R, G, and B subpixels without any patterning process. The optimized structure has been fabricated on a glass substrate using a thermal evaporation technique. When the DFPI structure was attached to the quantum-dot color-conversion layer, the full width at half maximum values of the green and red spectra decreased by 47.29% and 51.07% respectively. According to CIE 1931 color space, the DFPI showed a 37.66% wider color gamut than the standard RGB color coordinate. Thus it was experimentally proven that the proposed DFPI structure improved color purity. This DFPI structure will be useful in realizing a display with high color purity.

• Journal of Powder Materials
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• v.21 no.2
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• pp.102-107
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• 2014

A high temperature dilatometer attached to a graphite furnace is built and used to study the sintering behavior of $B_4C$. Pristine and carbon doped $B_4C$ compacts are sintered at various soaking temperatures and their shrinkage profiles are detected simultaneously using the dilatometer. Carbon additions enhance the sinterability of $B_4C$ with sintering to more than 97% of the theoretical density, while pristine $B_4C$ compacts could not be sintered above 91% due to particle coarsening. The shrinkage profiles of $B_4C$ reveal that the effect of carbon on the sinterability of $B_4C$ can be seen mostly below $1950^{\circ}C$. The high temperature dilatometer delivers very useful information which is impossible to obtain with conventional furnaces.

• Korean Journal of Health Education and Promotion
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• v.10 no.2
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• pp.40-55
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• 1993

To obtain information about knowledge and attitude toward sex, sexural experience and need of sex education, a questionnaire survey was conducted on 599 students who were attended in 2nd grade of 2 girls' high schools(A group: 190 girls), 2 vocational girls' high schools(B group: 205 girls), and 2 special girls' high school attached to industrial company(C group: 204 girls) in Taegu city between 20th and 25th April 1992. Mean score of knowledge toward sex of the total was 9.3. Mean score of A group was higher than that of Band C groups. Among the total students, vocational high school girls were the highest affirmative attitude towards the acquaintance and relationship with the other sex, and the next was special high school girls. Students of B group assumed the highest negative attitude towards artificial abortion, and the lowest was A group. Among the respondent girls, 31.1% did not experienced in the acquaintance and relationship with the other sex and 86 girls(14.4%) had experience with sexual affairs. Most of girls(96.9% of A group, 90.4% of B group and 86.8% of C group) agreed to necessity of sex education, and answered that current education on sex was insufficient to them(80.6% of A group, 82.6% of B group and 62.4% of C group). Among what the surveyed girls wanted to know about knowledge towards sex, they showed the highest interest on the acquaintance and relationship with the other sex(A group: 44.7%, B group: 45.4%, C group: 56.4%). And they showed the second highest interest on pregnancy and delivery(A group: 33.2%, B group: 32.6% , C group: 26.5%). There was no unique difference among each surveying item. Most of the students(A group: 46.8%, B group: 40.1%, C group: 36.3%) thought it better that the time they wanted to get education on sex in 5th or 6th grade of elementary schools and to have a regular curriculum on sex education.

• Fashion & Textile Research Journal
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• v.23 no.6
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• pp.852-859
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• 2021

The purpose of this study is to investigate the clothing management behavior and the recognition of care label of college students, as well as the effects of sex and the learning experience of clothing life area on middle and high school students. A survey consisting of 61 questions was conducted on 475 college students(240 males and 235 females) enrolled in a university in Cheongju City, and 450 college students' data were finally analyzed. The results are as follows. First, the level of washing behavior(2.54) was the lowest compared to purchasing behavior(3.13) and storage behavior(3.09). Second, college students were well aware of the attachment of fiber care labels, but 64.7% of the college students did not check the care label. About 30% of them did not know why the care labels were attached, and about 57% did not know whether manufacturers were obligated to attach them. The meaning of precautions for handling in a care label was well inferred from the symbols. Third, there was the positive effect of the learning experience of clothing life area during middle or high school on the college students' clothing management behavior and the level of recognition of a care label. This study is meaningful in confirming the positive effect of clothing life education in adolescence on adult clothing life behavior.

• International Journal of Internet, Broadcasting and Communication
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• v.12 no.2
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• pp.1-7
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• 2020

The secure access the lighting, Heating, ventilation, and air conditioning (HVAC), fire safety, and security control boxes of building facilities is the primary objective of future smart buildings. This paper proposes an authorized user access to the electrical, lighting, fire safety, and security control boxes in the smart building, by using color grid coded optical camera communication (OCC) with face recognition Technologies. The existing CCTV subsystem can be used as the face recognition security subsystem for the proposed approach. At the same time a smart device attached camera can used as an OCC receiver of color grid code for user access authentication data sent by the control boxes to proceed authorization. This proposed approach allows increasing an authorization control reliability and highly secured authentication on accessing building facility infrastructure. The result of color grid code sequence received by the unauthorized person and his face identification allows getting good results in security and gaining effectiveness of accessing building facility infrastructure. The proposed concept uses the encoded user access authentication information through control box monitor and the smart device application which detect and decode the color grid coded informations combinations and then send user through the smart building network to building management system for authentication verification in combination with the facial features that gives a high protection level. The proposed concept is implemented on testbed model and experiment results verified for the secured user authentication in real-time.

• Journal of Fisheries and Marine Sciences Education
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• v.4 no.1
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• pp.47-61
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• 1992

An experimental study was carried out to investigate the condensation performance for the horizontal cylindrical heat transfer tube with various fin attached using R-11 vapor. The heat transfer tube used in this study was supplied by SUNG HYUNG METAL CO., LTD. Four different types of heat transfer tubes (plain tube, SH-CYR tube, thermocor tube and thermoexcel tube) were used. Each tube was surrounded by circular acrylate tube, and R-11 gas heated by boiler flows into the acrylate tube. Cooling water counter-flows in heat transfer tubes. Heat transfer coefficient of the plain tube from measured data was compared with those of three other tubes. The results are summarized as follows: 1. As the cooling water temperature decreased, the liquid film of R-11 turned to droplet drop on the top surface of the horizontal tube. 2. Heat transfer coefficient calculated theoretically was higher than that obtained from the experimental data. 3. As far as the condensation concerns the thermocor tube is the highest, the SH-CYR tube is the second, and the thermoexcel tube is the third excluding the plain tube.

• Transactions on Electrical and Electronic Materials
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• v.8 no.5
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• pp.206-210
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• 2007

Carbon nanotubes(CNTs) are largely synthesized on Fe catalysts by catalytic chemical vapor deposition. The various shapes and compositions of these nanostructure CNTs were obtained by controlled parameters such as the reaction temperature, gas-mixing ratio. The influence of these parameters is investigated, together with observations of the produced materials after the purification processes. A diameter of CNTs, range from 2 to 10 nm, closely correlated with the size of the catalyst particle found attached to the tube end. The yield of CNTs was estimated to be 88.5 % and the purities of CNTs thus obtained were more than 80 %. The experimental results were documented with field emission scanning electron microscopy and raman spectroscopy and transmission electron microscopy, both before and after the purification.