• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.3
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• pp.291-300
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• 2017

Quantum-dot cellular automata(QCA) is a computing model designed to be similar to cellular automata, and an alternative technology for next generation using high performance and low power consumption. QCA is undergoing various studies with recent experimental results, and it is one of the paradigms of transistors that can solve device density and interconnection problems as nano-unit materials. An XOR gate is a gate that operates so that the result is true when either one of the logic is true. The proposed XOR gate consists of five layers. The first layer consists of OR gates, the third and fifth layers consist of AND gates, and the second and fourth layers are designed as passages in the middle. The half adder consists of an XOR gate and an AND gate. The proposed half adder is designed by adding two cells to the proposed XOR gate. The proposed half adder consists of fewer cells, total area, and clock than the conventional half adder.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.10
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• pp.895-903
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• 2017

Quantum Cellular Automata(QCA) is one of the proposed techniques as an alternative solution to the fundamental limitations of CMOS. QCA has recently been extensively studied along with experimental results, and is attracting attention as a nano-scale size and low power consumption. Although the XOR gates proposed in the previous paper can be designed using the minimum area and the number of cells, there is a disadvantage that the number of added cells is increased due to the stability and the accuracy of the result. In this paper, we propose a gate that supplement for the drawbacks of existing XOR gates. The XOR gate of this paper reduces the number of cells by arranging AND gate and OR gate with square structure and propose a half-adder by adding two cells that serve as simple inverters using the proposed XOR gate. Also This paper use QCADesginer for input and result accuracy. Therefore, the proposed half-adder is composed of fewer cells and total area compared to the conventional half-adder, which is effective when used in a large circuit or when a half - adder is needed in a small area.

• Korean Journal of Optics and Photonics
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• v.13 no.5
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• pp.421-424
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• 2002

By using SOA (Semiconductor Optical Amplifier) based devices, an all-optical half adder has been successfully demonstrated at 10 Gb/s. All-optical XOR and AND gates are utilized to realize SUM and CARRY. Since SUM and CARRY have been simultaneously realized to form the all-optical half adder, complex calculation and signal processing can be achieved.

• 한국식생활문화학회:학술대회논문집
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• 2007.03a
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• pp.117-117
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• 2007

• Progress in Medical Physics
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• v.9 no.3
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• pp.137-141
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• 1998

The purposes of this report are to evaluate whether lead ball and steel ball could be used as protective material of radiation and to acquire physical data of them for protecting 4-10 MV X-ray beams. Lead balls of diameter 2.0～2.5mm or steel balls of diameter 1.5～2.0 mm were filled in an acrylic box of uniform width. An MV radiograph of metal balls in a box were taken to ascertain uniformity of ball distribution in the box. Average density of metal ball and linear attenuation coefficient of metal balls for 4～10 MV X -rays were measured. At the time of measurement of linear attenuation coefficient, Farmer ionization chamber was used and to minimize the scatter effect, distance between the ball and the ionization chamber was 70 cm and field size was 5.5cm${\times}$5.5cm. For comparison, same parameters of lead and steel plates were measured. The distribution of metal balls was uniform in the box. The density of a mixture of lead-air was 6.93g/cm$^3$, 0.611 times density of lead, and the density of a mixture of steel-air was 4.75g/cm$^3$, 0.604 times density of steel. Half-value layers of a mixture of lead-air were 1.89 cm for 4 MV X-ray, 2.07 cm for 6 MV X-ray and 2.16 cm for 10 MV X-ray, and approximately 1.64 times of HVL of lead plate. Half-value layers of a mixture of steel-air were 3.24 cm for 4 MV X-ray, 3.70 cm for 6 MV X-ray and 4.15 cm for 10 MV X-ray, and approximately 1.65 times of HVL of lead plate. Metal balls can be used because they could be distributed evenly. Average densities of mixtures of lead-air and steel-air were 6.93g/cm$^3$, 4.75g/cm$^3$ respectively and approximately 1.65 times of densities of lead and steel. Product of density and HVL for a mixture of metal-air are same as the metal.

• The Korean Publising Journal, Monthly
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• s.361
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• pp.108-109
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• 2005

• Korean Institute of Interior Design Journal
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• no.41
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• pp.198-205
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• 2003

In this multi-cultural era, the cultural identity of each nation has appeared as a major issue, and needs to clearly define it through comparisons with other cultures have been raised. This research aims to analyze characteristics of traditional furniture of Korea and China according to residential culture and to find out their similarities and dissimilarities. ‘Banga’ in Korea ‘Sahapwon’ in China in the same era were selected for the comparison for traditional furniture between Korea and China. In the part of comparative analysis, characteristics of the furnitures are summerized based on classification into spatial system of housings and types of furniture. After that, traditional residential cultural differences between two countries that reflected on characteristics of furniture are distinguished and compared. The result of analysis is expected to act a part role of defining the cultural identity of Korea.

• Journal of architectural history
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• v.28 no.3
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• pp.19-28
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• 2019

The purpose of this study is to identify the form and components, decoration and locality of pyongnangans(平欄干) in Yangban's Houses(32 Houses) in Gyeongbuk region, The results of this study, which were carried out through both survey and on-site study, are as below. First, Pyongnangans of Gyeongbuk region Yangban's Houses can be classified into 4 different types, which are (1)Mureum type, (2)Gyoran(交欄) type, (3)Mureum-Saldae combination type, (4)Simplified Saldae type. And these 4 types are again subdivided into eight types, depending on differences of both detailed form and framework. Gyoran type are the most common cases in Yangban's Houses of Gyeongbuk region, whose number is followed by the order of Mureum type, Mureum-Saldae combination type and Simplified Saldae type Pyongnangans. Decorative 亞 shaped Gyoran type are more set up in Sarangchaes than in Anchaes, and this was because Decorative Gyorans are more appropriate to show the Social status and class of a patriarch than humble Mureum type. Pyongnangans of Yangban's Houses in Gyeongbuk region have their peculiarities in the exclusion of decorativeity, by consistent use of plain single-layer Pyongnangans. A certain locality is reflected on the types and detailed forms of Pyonnangans. Mureum type are widely found in Gyeoungju region Yangban's Houses, while Gyoran type were more often used in Andong region. In Bonghwa region, Mureum-Saldae combination type are found in large quantities. This was due to the locational chateristics of Sarangchaes in Bonghwa region, which were usually built on steep slopes.

• 식품문화 한맛한얼
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• v.1 no.2
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• pp.123-125
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• 2008

1천년 문화유산을 간직하고 있는 강릉(江陵)은 태백준령에서 흘러내리는 맑은 하천이 수놓은 기름진 들녘과 수자원이 풍성한 동해바다를 거느리고 있어 음식문화 또한 다채롭다. 날로 먹어도 꺼릴 것이 없는 청정한 해산물과 반가에 전래해오는 전통한식, 사천 한과를 비롯한 서지마을 질밥과 씨종지떡 등 고유한 민속음식들이 유구한 경지를 자랑한다.

• Journal of the Korean Society for Nondestructive Testing
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• v.22 no.5
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• pp.539-544
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• 2002

The purpose of this study is to examine the change of full width half maximum(FWHM) and residual stress during fatigue process in S45C Steel, by X-ray diffraction. For S45C Steel, the relationship between the change in fatigue damage of the specimen and the FWHM, and residual stress of X-ray diffraction profiles during the fatigue processes has been investigated. The FWHM decreases in the early period of fatigue cycle. The change of FWHM is associated with cyclic work hardening. The change of the FWHM is not significant in $10{\sim}20%$ of ratio of fatigue life. The residual stress is changed with fatigue cycle increasing during the fatigue pro process.