• Korean Journal of Human Ecology
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• v.11 no.2
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• pp.177-188
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• 2002

The purpose of this study was to appreciate Japanese clothing and ornament of the men's costume that showed a unique style of Japan as well as a mixture of foreign civilization in Edo period. The data related clothing, ornament and art of Japan were collected from books and slide films that had been studied in Japan, because the data studied in Korea were not enough. The results were as follows: First characteristic is. the dualism. The dualism was shown in the social class, estheticism and originality. In terms of the social class, the feudalism remained through their heraldry or mark of organization even though it was broken down. In terms of estheticism, it showed the coexistence of gorgeousness and plainness. In terms of the originality, it showed the coexistence of original Kosode and Kappa under the influence of Southern barbarians' mode. Second characteristic is the utility. $Ch{\check{o}}nin$ was needed to the functional clothing because of Its social position that had much activity. Therefore, the utility was shown in a simple silhouette of Haori and Hanten and in its way of wearing.

• International Journal of Naval Architecture and Ocean Engineering
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• v.5 no.4
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• pp.513-528
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• 2013

A floating Oscillating Water Column (OWC) wave energy converter, a Backward Bent Duct Buoy (BBDB), was simulated using a state-of-the-art, two-dimensional, fully-nonlinear Numerical Wave Tank (NWT) technique. The hydrodynamic performance of the floating OWC device was evaluated in the time domain. The acceleration potential method, with a full-updated kernel matrix calculation associated with a mode decomposition scheme, was implemented to obtain accurate estimates of the hydrodynamic force and displacement of a freely floating BBDB. The developed NWT was based on the potential theory and the boundary element method with constant panels on the boundaries. The mixed Eulerian-Lagrangian (MEL) approach was employed to capture the nonlinear free surfaces inside the chamber that interacted with a pneumatic pressure, induced by the time-varying airflow velocity at the air duct. A special viscous damping was applied to the chamber free surface to represent the viscous energy loss due to the BBDB's shape and motions. The viscous damping coefficient was properly selected using a comparison of the experimental data. The calculated surface elevation, inside and outside the chamber, with a tuned viscous damping correlated reasonably well with the experimental data for various incident wave conditions. The conservation of the total wave energy in the computational domain was confirmed over the entire range of wave frequencies.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.11
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• pp.972-981
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• 2013

Future aspects of the has turned into a network centric warfare(NCW). Organically combined wired and wireless networks in a variety of cross-of-the-art combat power factor utilization of information and communication technology is a key element of NCW implementation. At used various information in the NCW must be the confidentiality and integrity excellent then quick situation assessment through reliability the real-time processing, which is the core of winning the war. In this paper, NCW is one of the key technologies of the implementation of 128-bit output stream cipher algorithm is proposed. AES-based stream cipher developed by applying modified OFB mode the confidentiality and integrity as well as hardware implementation to the security and real-time processing is superior.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.1
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• pp.88-96
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• 2016

In this paper, the GaN FET based phase-shift full-bridge dc-dc converter design is implemented. Switch characteristics of GaN FET were analyzed in detail by comparing state-of-the-art Si MOSFET. Owing to the low conduction resistance and parasitic capacitance, it is expected to GaN FET based power conversion system has improved performance. However, GaN FET is vulnerable to electric interference due to the relatively low threshold voltage and fast switching transient. Therefore, it is necessary to consider PCB layout to design GaN FET based power system because PCB layout is the main reason of stray inductance. To reduce the electric noise, gate voltage of GaN FET is analyzed according to operation mode of phase-shift full-bridge dc-dc converter. Two 600W phase-shifted full-bridge dc-dc converter are designed based on the result to evaluate effects of stray inductance.

• Journal of the Korean Society of Costume
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• v.52 no.1
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• pp.21-36
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• 2002

The Miaos have their own unique and luxurious culture traditional and modern formed as they have experienced repeated fusion into and resistance against the Han Race or the Chinese in their long and old history. Taijiang County of Guizhou Provice, in which whey have been living, is endowed with natural beauty. Thus their culture enjoys abundant and diverse contents of artificial and natural character. Naturally, their costume reflects cultural and natural features in abundance and variety. This dissertation aims to investigate the artistic character of Miaos' traditional costume as reflected in patterns for their embroidery. As for the artistic character of the patterns for embroidery, the following were found. To begin with, the space in the Miaos' embroidery is, unlike the measurable three-dimensional space found in Greek art, unmeasurable and fantastic with its beauty, majesty and peculiarity. It is as if immersed in limitless space, they were in communion with gods and universe. Another characteristic is the use of image construction beyond mere imitation. Their mode of image construction was realistic in that patterns as a whole reveal an abstract form or meaning but separately they portray visual representations of concrete thins in nature. Still another is that sense of motion conveyed by the basic curve line is full of life. It was the result of using light rhythm breaking stereotypic balance and symmetry. Finally, the colouring was abstract, and a strong contrast between black and white was gorgeous and fantastic.

• Journal of the Korea Fashion and Costume Design Association
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• v.4 no.2
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• pp.163-172
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• 2002

There have been many unbalanced attempts to break the rules with Renaissance movement which connects with the past in the current art. And From the latter half of Twenty century to the early half of twenty one century, the common sense of fashion is turned over by(unthinkable fashion). To analyze current apparence of fashion, this research make a comparison of fashion condition between the sixteenth century and twenty century fashion, Three analysis methods is introduced. First of all, this paper make research of original language of mannerism and unthinkable apparence. Second, appearances of mannerism fashion and unthinkable fashion which are taken from reference books and pictures. Third, Gathering methods which express own style between two periods in the end part of research. As a result, Although Mannerism isn't practical for the visual and new pleasure, and neglect humanism of Renaissance, It is a tendency which is willing to change the flow of prevailing mode, and to reflect asking of people each periods. Mannerism and unthinkable fashion is apparence of society to refresh own feeling. And then, Mannerism and unthinkable fashion is a new challenge to escape from fixed thought.

• Proceedings of the Korean Society of Crop Science Conference
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• 2005.08a
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• pp.22-46
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• 2005

Spatial and timely information on crop and filed conditions is one of the most important basics for rational and efficient planning and management in agriculture. Remote sensing, GIS, and modeling are powerful tools for such applications. This paper presents an overview of the state of the art in remote sensing of crop and field conditions with some case studies. It is also shown that a synergistic linkage between process-based models and remote sensing signatures enables us to estimate the multiple crop/ecosystem variables at a dynamic mode. Remotely sensed information can greatly reduce the uncertainty of simulation models by compensating for insufficient availability of data or parameters. This synergistic approach allows the effective use of infrequent and multi-source remote sensing data for estimating important ecosystem variables such as biomass growth and ecosystem $CO_2$ flux. This paper also shows a geo-spatial information system that enables us to integrate, search, extract, process, transform, and calculate any part of the data based on ID#, attributes, and/or by river-basin boundary, administrative boundary, or boundaries of arbitrary shape/size all over Japan. A case study using the system demonstrates that the nitrogen load from fertilizer was closely related to nitrate concentration of groundwater. The combined use of remote sensing, GIS and modeling would have great potential for various agro-ecosystem applications.

• Journal of Welding and Joining
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• v.32 no.1
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• pp.102-107
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• 2014

SCR(Thyristor) type $CO_2$ welders have widely used for the welding process of heavy industries such as shipbuilding and plant. Since the industrial fields of shipbuilding and plant are usually exposed to severe welding condition with lots of dust, extreme temperature, high humidity and vibration, it is not recommended to use inverter type welder despite its state-of-the-art technology. Many sophisticated functions in the inverter welder may not work due to malfunction of its sensitive components. Hence this study focused on digitalization of SCR $CO_2$ welder by making use of microprocessor for SCR phase control. By this application, fine control of output of the $CO_2$ welding systems is achieved. Also pulse output mode of operation is realized and its verification is carried out with aluminum sample welding. The experimental results showed sound weld bead. The front operation panel provide user with numerical parameter settings and monitors. It will help precise weld process monitoring and control with digital value.

• Journal of the Ergonomics Society of Korea
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• v.22 no.1
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• pp.31-42
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• 2003

This study describes a modification of the technique for human error analysis in nuclear power plants (NPPs) which adopts advanced Man-Machine Interface (MMI) features based on computerized working environment, such as LCOs. Flat Panels. Large Wall Board, and computerized procedures. Firstly, the state of the art on human error analysis methods and efforts were briefly reviewed. Human error analysis method applied to NPP design has been THERP and ASEP mainly utilizing Swain's HRA handbook, which has not been facilitated enough to put the varied characteristics of MMI into HRA process. The basic concepts on human errors and the system safety approach were revisited, and adopted the process of FMEA with the new definition of Error Segment (ESJ. A modified human error analysis process was suggested. Then, the suggested method was applied to the failure of manual pump actuation through LCD touch screen in loss of feed water event in order to verify the applicability of the proposed method in practices. The example showed that the method become more facilitated to consider the concerns of the introduction of advanced MMI devices, and to integrate human error analysis process not only into HRA/PRA but also into the MMI and interface design. Finally, the possible extensions and further efforts required to obtain the applicability of the suggested method were discussed.

• Journal of the Korean Society of Costume
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• v.51 no.7
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• pp.21-33
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• 2001

The purpose of this study is to Investigate the value of multi-culture and to examine how multi-culture has been reflected in men's fashion. As for the research methodology, literary research was under taken to study psychoanalytical and socioeconomic contexts in which multi-culture in men's fashion has been formed. In addition, demonstrative studies on styles were undertaken through the analysis of pictures and photos. The historical range of this study is from the 19th century when western and modern original form of men's dress were visualized, to the year 2001 when the elements of multi-culture are expressed in men's fashion. Westerners in 19th century respected Greek fine arts and the desire for realistic restoration of the body of Greek hero is well reflected in men's suits. Other races were forced to believe such realistic depiction of the Greek body as a symbol of modernization. With the advent of the Information Society In the late 20th century, absolute power had been decentralized, and people in the third world have revealed the racial contradictions by realizing the concept of splitted subject existing In unconscious. In the post-colonial world in the late 20th century, the value of diverse cultures is admitted. Models come from various races in fine art or photographic work Fashion trends are no longer limited to dominant mode, and designers express multi-culture by adopting and renewing folk elements from all over the world.