• International Journal of Safety
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• v.3 no.1
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• pp.53-58
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• 2004

SMART-P is a promising advanced small and medium category nuclear power reactor. It is an integral type reactor with a sensible mixture of new innovative design features and proven technologies aimed at achieving a highly enhanced safety and improved economics. The enhancement of the safety and reliability is realized by incorporating inherent safety improving features and reliable passive safety systems. The improvement in the economics is achieved through a system simplification, and component modularization. Preliminary safety analyses on selected limiting accidents confirm that the inherent safety improving design characteristics and the safety system of SMART-P ensure the reactor's safety. SMART-P is an advanced integral pressurized water reactor. The purpose of this study is for the safety analysis of the steam generator module pipe break for the SMART-P. The integrity of the fuel rod is the major criteria of this analysis. As a result of this analysis, the safety of the RCS and the secondary system is guaranteed against the module pipe break of a steam generator of the SMART-P.

• Journal of Power Electronics
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• v.10 no.6
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• pp.673-679
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• 2010

Input-series-output-parallel (ISOP) connected DC-DC converters enable low voltage rating switches to be used in high voltage input applications. In this paper, a DSP is adopted to generate digital phase-shifted PWM signals and to fulfill the closed-loop control function for ISOP connected two full-bridge DC-DC converters. Moreover, a stable output current sharing control strategy is proposed for the system, with which equal sharing of the input voltage and the load current can be achieved without any input voltage control loops. Based on small signal analysis with the state space average method, a loop gain design with the proposed scheme is made. Compared with the conventional IVS scheme, the proposed strategy leads to simplification of the output voltage regulator design and better static and dynamic responses. The effectiveness of the proposed control strategy is verified by the simulation and experimental results of an ISOP system made up of two full-bridge DC-DC converters.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.6A
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• pp.843-851
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• 2008

The conventional pile cap reinforcement systems regulated in the design specifications have some restrictions in design and construction such as requirement of shear key, disposition of reinforcing bars and insurance of anchoring length of reinforcements. This study suggests a new type of steel pipe pile cap system with perforated flat bar shear connector as an alternative to the conventional pile cap system for the improvement in structural performance and simplification of construction. And, experimental results of push-out and bending behavior are scribed for the evaluation of structural performance of the new pile cap system and it was compared to the structural behavior of conventional pile cap system.

• International Journal of Highway Engineering
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• v.15 no.3
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• pp.17-22
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• 2013

PURPOSES: Current theories for composite structures are too difficult for design engineers for construction. The purpose of this paper is to demonstrate to the practicing engineers, how to apply the advanced composite materials theory to the road structures. METHODS: Some laminate orientations have decreasing values of $D_{16}$, $B_{16}$, $D_{26}$ and $B_{26}$ stiffnesses as the ply number increases. The plate aspect ratio considered is from 1 to 5. In order to study the effect of $M_x$ on the equilibrium equations, two cases are considered. $M_x$ term is considered or neglected. RESULTS: Most of the road structures have high aspect ratios, for such cases further simplification is possible by neglecting the effect of the longitudinal moment terms. CONCLUSIONS: Most of the road structures have plate aspect ratios higher than 2. It is concluded that, for all boundary conditions, neglecting the longitudinal moment($M_x$) terms is acceptable if the aspect ratio (a/b) is equal to or higher than 2. This conclusion gives good guide line for design of the road structures.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.77-80
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• 2008

The conventional pile cap reinforcement systems regulated in the design specifications have some restrictions in design and construction such as disposition of reinforcing bars, insurance of anchoring length of reinforcements and requirement of shear key. This study suggests a new type of steel pipe pile cap system with perforated rib shear connector as an alternative to the conventional pile cap system for the improvement in structural performance and simplification of construction. And, experimental results of push-out are scribed for the evaluation of structural performance of the new pile cap system and it was compared to the structural behavior of conventional pile cap system.

• Journal of Digital Convergence
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• v.19 no.4
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• pp.259-265
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• 2021

This study is a study on the mobile gamification of PC games through analysis of the differences between PC games and mobile games, their respective advantages, and operation patterns, and attempts to extract important key elements of the mobile game process. The main methods of converting PC games to mobile games were analyzed and presented in four ways: complete transplantation, simplification, specialization and new genreization based on the standard of existing PC games. It is expected that PC games can play a role in providing guidelines for mobile gamification of PC games through the case analysis of existing games that have been converted to mobile games, as well as providing a path for the development and trends of game companies.

• Journal of the Korean Society of Clothing and Textiles
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• v.46 no.2
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• pp.292-309
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• 2022

The ongoing COVID-19 pandemic has caused a recession in the fashion industry. Therefore, this study aims to assess the influence of face masks on the selection of fashion products by Korean women in their twenties and thirties. This is highly relevant as the mandatory donning of face masks becomes a social norm. To this end, an in-depth interview and a survey were conducted. The results indicate that wearing a face mask affects consumers' fashion selection criteria in regard to styles, materials, colors, and types. Face masks have gradually contributed to the unification and simplification of fashion styles due to the atmosphere and wearing of the mask itself, which has led to a decline in the overall interest in fashion. Most consumers in this study felt a disconnect between face masks and fashion products, since the former have not been established within most fashion styles. Consequently, consumers had difficulty naturally aligning face masks with various fashion styles, which eventually led to a decreased interest in fashion. This study is significant in that it provides objective data that can be utilized to establish strategies in the fashion industry regarding the integration of face masks.

• Journal of the Korea Fashion and Costume Design Association
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• v.7 no.2
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• pp.51-60
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• 2005

This ethnography is on the passage ritual clothes in Incheon province. This ethnography invatigates in two villages of people who has same family name -Family 'Cheung' (from Young-il) in Yeonsoo-dong and Family 'Lee'(from Cheun-joo) in dongyang-dong- in August to December 2003. The object of examination is 80's and 70's old women who have lived and had lived up to recent in two villages. (grand mother Sung, Cho, Cheung and yoon) The clothes of passage ritual are Baenaeoht is the first clothes of the newborn baby(swaddling), A wedding ceremony clothe is the clothing for the coming-of-age ceremony, Honryebouk is the clothing for wedding, Sangbouk in the clothing for mourning, shroud is the clothing for the dead, sacrificial robes. The result of ethnogrphy is the passage ritual clothes in Incheon Province similar with other Provinces in aspect of the name and the form and wearing of the clothes. there are remarkable differences in making method from making by oneself to purchase(swaddling$\cdot$shroud), westernize(clothes for wedding and mourning), simplification (sacrificial) between ritual for their parents and their husband and children.

• Journal of ILASS-Korea
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• v.21 no.3
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• pp.121-129
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• 2016

The advantages of the common rail fuel injection system architecture have been recognized since the development of the diesel engine. In common rail systems, a high-pressure pump stores a reservoir of fuel at high pressure up to and above 2000 bar. And solenoid or piezoelectric valves make possible fine electronic control over the fuel injection time and quantity, and the higher pressure that the common rail technology makes available provides better fuel atomization. In this study, the direct needle-driven piezo injector was investigated for accomplishing injection pressure of 1800 bar by optimal design by simplification of component and changing number of springs and plates of DPI. It was found that a direct needle-driven piezo injection system features the prototype DPI for passenger vehicle to operate at 1800 bar of injection pressure.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.6
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• pp.605-611
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• 2019

3D Vision system has many applications recently but popularization have many problems that need to be overcome. Volumetric display may process a amount of visual data and design the high efficient vision system for display. In case of stereo system for volumetric display, disparity vectors from the stereoscopic sequences and residual images with the reference images has been transmitted, and the reconstructed stereoscopic sequences have been displayed at the receiver. So central issue for the design of efficient volumetric vision system lies in selecting an appropriate stereo matching and robust vision system. In this paper, we propose high efficient vision system with the reduction of rectification error which can perform the 3D data extraction efficiently with low computational complexity. In experimental results with proposed vision system, the proposed method can perform the 3D data extraction efficiently with reducing rectification error and low computational complexity.