• Journal of Institute of Control, Robotics and Systems
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• v.5 no.8
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• pp.923-931
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• 1999

In this paper, a modeling and a robust time-delay control for the reclaimer are investigated. Supplying the same amount of a raw material throughout the reclamation process from the raw yard to a sinter plant is important to keep the quality of the molten steel uniform in blast furnaces. As the actual parameter values of the reclaimer are not available, the boom rotational dynamics are modeled as a second order differential equation with unknown coefficients. The unknown parameters in the nominal model are estimated using a recursive estimation method. Another important factor in the control design of the reclaimer is the large time-delay in output measurement. Assuming a multiplicative uncertainty, that accounts for both the unstructured uncertainty neglected in the modeling and the structured uncertainty contained in the parameter estimation, a robust Smith predictor is designed. A robust stability criterion for the multiplicative uncertainty is also derived. Following the work of Goodwin et al. [4], a quantifying procedure of the multiplicative uncertainty bound, through experiments , is described. Experimental and simulation results are provided.

• Fashion & Textile Research Journal
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• v.11 no.2
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• pp.193-199
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• 2009

Now, the proportion of musical was strength in the stage art part to the past considerably as called musical boom. After 1990's, as if it was rise as rise of musical exclusive theater, it was development seriously in Korean musical. But presently, the examined musical product state as the ratio of import musical and creative musical is about 6 to 4 or 7 to 3, it was a inferiority of creative musical in a flood of import musical. So, this study researched for example Kim Kyun Hyoung' writing and Yu Min Suck' production, creative musical 'This is my destiny...' - played by Dept. of multimedia and film, Honam University in september 2007 - this researcher should give much theoretical and substantial assistance to stage costume producer by studying about producing costume of a aria story, a mental state. As I have studied sofar, in designing a stage costume for musical, the overall comprehension of the musical actor's bodies have to be considered. Though performing the manufacture of the really performance work. It is a field that needs various professional knowledge, and only when a musical is produced based on such theories, it will be possible to deliver the theme of the me of the play more effectively, becomes help in the efficiently theatrical costume manufacture realistically and express the various symbolical meanings.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06c
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• pp.519-527
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• 1996

Most operation related to the application granular agrochemicals in korea are manual and labour consuming. As a multipurpose granular applicator, a pneumatic granular applicator that can be attached to conventional ride -on machines for paddy field was designed in this study. Experiments and simulations were carried out for determine in the design factors with one fertilizer (DongBu 21-17-17) and one pesticide (SamKong Ivi). The maximum terminal velocity of granular chemicals was estimated as 14.2m/s. A better distribution pattern was obtained at the diffuser having only deflectors without dividing guides. The diffuser spacing 1.0m for the fertilizer and the diffuser spacing 0.8m for the pesticide at the boom height over 0.80m were acceptable for the uniform distribution. In the case that the forward speed of ride-on machines was 0.7m/s, the groove opening and the roller speed of the selected metering device were13mm -15mm at 2 rps for the fertilizer, and 9 mm-11mm at 0.25rps or the pesticide. This study suggested a method of developing a pneumatic applicator for granular agrochemicals.

• International Journal of Naval Architecture and Ocean Engineering
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• v.5 no.2
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• pp.263-276
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• 2013

Most yacht sails are made of thin fabric, and they have a cambered shape to generate lift force; however, their shape can be easily deformed by wind pressure. Deformation of the sail shape changes the flow characteristics over the sail, which in turn further deforms the sail shape. Therefore, fluid-structure interaction (FSI) analysis is applied for the precise evaluation or optimization of the sail design. In this study, fluid flow analyses are performed for the main sail of a 30-foot yacht, and the results are applied to loading conditions for structural analyses. By applying the supporting forces from the rig, such as the mast and boom-end outhaul, as boundary conditions for structural analysis, the deformed sail shape is identified. Both the flow analyses and the structural analyses are iteratively carried out for the deformed sail shape. A comparison of the flow characteristics and surface pressures over the deformed sail shape with those over the initial shape shows that a considerable difference exists between the two and that FSI analysis is suitable for application to sail design.

• Journal of Drive and Control
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• v.15 no.3
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• pp.49-56
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• 2018

Construction machinery is used to improve productivity in civil engineering work and construction work, and it is a lengthy operation, and consumes considerable fuel to cope with large loads. As a result, productivity and fuel consumption of the construction machine become the main deciding factors. In the hydraulic system of the excavator, the main control valve is the most critical position for control. The flow distribution for control performance is achieved by the metering orifice, that causes critical energy loss. To improve this, we propose a combination of a three port proportional pressure reducing valve and a poppet type flow control valve as an IMV to replace the existing spool type MCV. To validate the proposal, we analyze static characteristics by modeling mathematically, and analyze dynamic characteristics. Simulation using the AMESim software on the regeneration circuit of the boom cylinder up-down operation, verifies the energy-saving effect compared to the existing MCV when IMV is used.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.9 no.1
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• pp.35-41
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• 2010

An overload limiter is used to prevent its overturning accident during an operation of a movable crane. Recently the indirect measuring method, which measures hoisting load and overturning moment of overload limiter, demands instead of the existing method, which measures only hoisting load. The indirectly measuring method is how to conduct the hoisting load and overturning moment as measuring the load of hydraulic cylinder for a luffing driving of boom. So we need to develop the multi-angular pin type load cell with the measuring angle of ${\pm}10$ degree instead of the existing load cell with the measuring angle of ${\pm}2$ degree. In this study the finite element analysis is conducted to evaluate the effect of the aspect ratio of measuring cross section on the measuring limit of the load cell to develop the many-angular pin type load cell. For this investigation, the aspect ratio of measuring cross section and load applying angle were adopted as design parameters and the stresses of measuring part were evaluated for each parameter.

• Journal of Fashion Business
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• v.26 no.6
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• pp.47-63
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• 2022

This study aimed to examine the changes in women's fashion, focusing on the repercussions that bicycles had on women's life and fashion, centered on France in the 19th century, and then it examines the significance of the period to women's cycling clothing and its contribution to fashion. The research is based on literature and visual materials extracted from 19th century French newspapers, magazines, and posters. As a result of this study, the appearance of bicycles in the 19th century contributed to fashion as follows. First, the need for clothing suitable for outdoor activities promoted development of new designs with practical and functional features. Second, the clothing worn by female cyclists contributed to the introduction and propagation of new clothing, and pioneering wearing trousers. Third, the boom of bicycles in the 1890s led to the expansion of ready-to-wear items in department. The significance of the period to women's cycling clothing in the 19th century France is as follows. First, the era challenged customs and attitudes towards women's bicycle clothing and led to modernization. Second, a new and reasonable clothing design was presented that required a compromise to be accepted by the public. Third, although the clothing reform movement was not active in France, bloomer-style bicycle clothing was popular among fashionable women in Paris, revealing only its visual status as the capital of fashion in the 19th century.

• Journal of the Korea Society for Simulation
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• v.15 no.1
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• pp.51-58
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• 2006

Virtual Manufacturing is a powerful methodology for developing a new product, new equipment and new production system. It enables the checking errors in design before production. This paper is a case study of virtual manufacturing in an excavator factory. The final welding operations of the boom and the rotating table of upper body are selected for application. 3D models of parts and fixtures are developed with $CATIA^{(R)}$ and 3D simulation models are developed with $IGRIP^{(R)}$. These models are used for verifying the design of fixture and for the motion design of robot. As a result, the manual welding systems are replaced by automatic systems and many design errors are corrected in the design phase, which reduces the developing cost and time.

• Journal of the Korea Fashion and Costume Design Association
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• v.3 no.2
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• pp.75-86
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• 2001

The article is alms to investigate the characteristics, the originality, and the interest of fashion design of costume play, which is recently specifically popularized among young fashion mania. The influence of commercialization power of the Disneyland and the animation characters of Japanese caricatures makes the costume play to be one of the main new generation culture. Since the costume play just begins at this moment, the full understanding of the costume play is hard because of the small amount of the materials and happenings of the phenomena. However it reveals the design trends and creativity of the new generation. As the investigation of costume play fashion and the types of costume play, the following results are obtained. 1. The originality of the costume play is thought to be induced from the mask which is used against the ghost in primitive ages, the fancy parade of halloween festival, commercial advertisements of Disneyland, the Japanese caricatures, and the animation games. 2. The distinctive characteristics of Korean costume play shows the massive behaviour, which is different from the individualized costume play in Japan. This facts show the parts of the interest culture of the persons who has the equal interest. The costume play is applied as the sound showing culture, in which the young generation express and enjoy themselves by"kki" - the passion of young energy. 3. The boom of costume play introduce the increased number of costume play shop, pro model, and designer. It also introduce the interest of the new fashion design for the young generations. Thus it is expected the new fashion infra structure in near future.ar future.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.327-334
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• 2018

This study focuses on regathering the regional festival tourists through the reuse of Pyeongchang Winter Olympics facilities. It has a purpose of proposing directions to develop regional festival through the case analysis of successful domestic and international festivals. As a method of primary study, case analysis of domestic and international festivals and literature study were done. It was developed by data from the Statistics Office and Culture Tourism. This study suggests the Trout Festival and Snow Festival, to develop the following strategy using the facilities and make new, fused contents for the festivals. It expects the increase in facilities utilization and boom in regional economy to appear with the initiation of the unique strategy. This study to be used as a reference in the future for regathering the tourists and future studies on this specific topic.