• The Journal of the Korea Contents Association
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• v.9 no.3
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• pp.152-163
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• 2009

This essay researches which affective responses can be made from musical elements of Korean traditional music through adjective description about mood responses. It results that traditional mode which are classified into Pyoungjo and Gyemounjo hardly have any the affective responses, while major and minor mode, tempo, tone color, vertical and horizontal texture have some effects on particular affects. Meanwhile, newly composed Korean traditional music have more effects for as inducing affective responses rather than works as old Korean traditional music. As well as Western music, Korean traditional music induces different affective responses to each musical element. As such, this aspects can be adopted to different realms like background music, commercial music, music therapy and so on.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.03a
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• pp.810-812
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• 2008

Previously study on structural design of the main wing of the twenty-seat class WIG(Wing in Ground Effect) craft. In the final design, three spars construction was selected for safety in the critical flight load, and the Carbon-Epoxy material was selected for lightness and structural stability. In this study, the forced vibration analysis was performed on the composite main wing structure of the twenty-seat class WIG craft with two-stroke pusher type reciprocating engine. The vibration analysis based on the finite element method was performed using a commercial FEM code, MSC/NASTRAN. Excitations for the frequency response analysis were assumed as the H-mode(horizontal mode), the V-mode(vertical mode) and the X-mode(twisted mode) which are typical main vibration modes of engine. And excitations for the transient response analysis were assumed as the L-mode(longitudinal mode) with the oscillating propeller thrust which occurs in operation. According to the result of forced vibration analysis, structural design was modified to reduce the vibrations.

• Journal of the Korean Society of Safety
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• v.37 no.6
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• pp.81-88
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• 2022

It is necessary to better understand the effect of age-related degradation on the performance of reinforced concrete shear walls in nuclear power plants in order to ensure their structural safety in the event of earthquakes. Therefore, this paper studies seismic fragility of the typical shear wall in nuclear power plants under earthquake excitation Reinforced concrete shear wall is composed of wall, horizontal and vertical flanges. Due to characteristics of its geometry, it is difficult to predict the ultimate behavior of shear wall under earthquake excitation. In this study, for more realistic numerical simulation, the Latin Hyper-Cube (LHC) simulation technique was used to generate uncertain variables for the material properties of concrete shear walls. The effects of crack, characteristics of inelastic behavior of concrete, and loss of cross section were considered in the nonlinear finite element analysis. The effects of aging-related deterioration were investigated on the performance of reinforced concrete shear walls through analysis of undegraded concrete shear walls and degraded concrete shear walls. The resulting seismic fragility curves present the change of performance of concrete shear wall due to age-related degradation.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2005.11a
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• pp.173-178
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• 2005

In this paper, an efficient and robust analysis system for the flutter optimization of laminated composite wings has been developed using the coupled computational method based on the genetic algorithm. General three-dimensional doublet-lattice method is efficiently used to compute generalized aerodynamic forces of T-tail configuration in the frequency domain. Structural dynamic analyses of laminated composite T-tail models are conducted using finite clement method. The classical P-k flutter analysis technique is applied to effectively solve the aeroelastic governing equations in the frequency domain. Optimum design studies using genetic algorithm have been conducted in order to obtain maximum flutter stability of a composite T-tail configuration. The results show that flutter stability can be significantly increased using composite materials with proper optimum design concepts even for the same weight and shape condition. In the view point of engineering design, it is also importantly shown that the optimization of the vertical wing part is highly effective comparing to the optimization of horizontal wing part.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.37 no.4
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• pp.251-258
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• 2024

This study investigated the effect of bearing aging on the seismic response of a three-span continuous concrete girder bridge with pot bearings installed. The pot bearings were modeled as elastic springs in the longitudinal, transverse, and vertical directions of the bridge to reflect the stiffness of fixed and movable supports. The effect of bearing aging on the seismic response of the bridge was examined by considering two factors: a decrease in the horizontal stiffness of the fixed bearings and an increase in the horizontal stiffness of the movable bearings. The finite element model of the three-span continuous girder bridge was validated by comparing its numerical natural frequencies with the designed natural frequencies. Using artificial ground motions that conform to the design response spectrum specified by the KDS bridge seismic design code, the seismic responses of the bridge's girders and bearings were calculated, considering the bearing stiffness variation due to aging. The results of a numerical analysis revealed that a decrease in the horizontal stiffness of the fixed bearings led to an increase in the absolute maximum relative displacement of the bearings during an earthquake. This increases the risk of the mortar block that supports the bearing cracking and the anchor bolt breaking. However, an increase in the horizontal stiffness of the movable bearings due to aging decreased the absolute maximum shear on the fixed bearings. Despite the shear reduction in the fixed bearings, the aging of the pot bearings change could cause additional tensile bending stress in the girder section above the free bearings, which could lead to unexpected structural damage to the continuous bridge during an earthquake.

• Korean Journal of Applied Biomechanics
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• v.18 no.4
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• pp.77-87
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• 2008

This study is to formulate strategy for subject who are selected as national team in horizontal bars event in apparatus gymnastics. For this, skill training program was applied to players for 8 weeks. Then it was analyzed by using 3D motion Analysis system to seek the difference between before and after using the program. There were decisive demerit element K's first try for Tkatchev stretched movement from low elevation and crooked body while elevating. Not only, the location of his center of mass is far and low and there was some concern in his landing due to bended his hip-joint, but also, it exposed weak point in retro-action followed technique. Thus, to overcome that weak point, the subject repeated practices on following; when preparing for Tkatchev stretched movement at downward for big spin, make sure extend shoulder angle faster, make sure Tap movement is short and concise using hip-joint angular while delaying Tap timing for folding the body, and moreover, while backlashing the body, used shoulder joint angle wide to pull up the body. As a result, the speed of vertical upward did rut increase when separation from the bar. However, height of elevation increased that the leg would rut hit the horizontal bar even straight up the hip-joint. Therefore, the movement itself provided magnificent motion and even helped decrease the demerits.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2006.11a
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• pp.91-94
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• 2006

The way to shorten a construction period is considered to an very important technology development element as reducing the formwork removal periods with promoting strength revelation own concrete. This study executed experiment to review usability of early strength revelation chemical admixture which is judged in ways effective with premature removal of form about concrete. Use of early strength revelation AE water reducin admixture is apperaing so that strength revelation by early hydration promotions is excellent. The results of being applied proposed work process are that compressive strength are appeared more than 5MPa within 16 hours so that removal of vertical form was possible. the concrete compressive strength satisfied with a more than 2/3 of specified concrete strength for removal of horizontal form are appeared in 42 hours of 27 MPa proportioning strength, in 36 hours of 30, 35 MPa proportioning strength so that the 6 days cycle time of concrete structural frame work is cut by 2 days as shortening delayed period in works of removing slab forms. So construction cost reductions and a construction period shortening are judged so that it is possible.

• Journal of the Korean Society of Costume
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• v.41
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• pp.169-183
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• 1998

The Tartan, the representative check pattern and traditional costume of Scothand, is the most popualr checker which has inherited from the clans of the Scotch Highlands in the ancient times and continued to develop. It is a symbol of the Scotch culture and tadition and widely used in various ways according to status, birthplace purpose and use. Therefore, this study was intended to inquire into Tartan check. The purpose of this study attempted to make a systematic investigation of the characteristic of the Tartan check. the checker using vertical and horizontal lines which was the universal plastic element and inquire into it in terms of era, designers and combined works. By doing so, this study attempted to investigate the phase of the Tartan check in world fashion and further forecast the future of checker design applicable to the 21th-Century fashion. In addition it, attempted to investigate the features of Scottch costume unknown in our academic circles and inquire into the proless in while the Scottch has retained the originality of its own which suppressed by neighboring countries. This study could find out that the checker is the element of infinite applicability in the future. It is expected that the sophisticated and beautiful design using the checker will be presented by many Korean designer through the overall and systanatic study of the checker. On the other hand, to make an empirical study costume of other races, a comprehensive examination should be made of the social and cultural background against which locals are using their costume, through the survey of their real costume and on-spot research. It this respect, this study has some limitation in time and data collection. Besides the analysis of costume through materials and photos in museums as well as the study of cloth material and accurate colors was not con여cted in this in this study. This will remain to be study of in the future.

• Journal of Environmental Science International
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• v.12 no.9
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• pp.921-934
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• 2003

The purpose of this study is to identify the characteristics and differences of borrowed landscape in traditional arbors and temples in Jeonbuk province. And this study is attempted to widespread the width of understanding the traditional landscape borrowing method for contributing in modem reception and creation of landscape architectural culture. For this, 30 traditional arbors and 30 traditional temples in Jeonbuk province were selected. The orientation of the place of view point, distance, vertical and horizontal angle were surveyed for identifying the structure of borrowed landscape. Furthermore main element, auxiliary element and a media of borrowed landscape were surveyed also. Two hypothesis were established for verifying the feasibility and real effectiveness of research results. First, the willingness of borrowed landscape shall be being in establishing traditional arbors and temples. Second, this willingness of borrowed landscape shall be accomplished in arbor space more positively than in temple space. The results of this study are as follows; 1. In temples, the surrounding landscape adapted in Buddhism principles are principally expressed, whereas in arbors, congregating landscape, variety landscape, background landscape for establishing good view point and enframed landscape are induced for making authoritative landscape as various borrowed landscape techniques. 2. The distance to borrowed landscape in temples is involved in far landscape region, whereas that in arbors is in middle and near. In comparative with temples, the arbors shows variety in distance to the borrowed landscape objects. 3. Down view borrowing is used generally in arbors, whereas upper view borrowing is used in temples at the view angle to the borrowed landscape objects. 4. Borrowed landscape objects are more considered factors than view scope in arbors. Main elements for borrowing landscape are very various arbors, but those are simple as mountains and peaks in temples. And natural elements are much more than artificial things in arbors as a media of borrowing landscape in comparative with temples.

• International Journal of Naval Architecture and Ocean Engineering
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• v.10 no.5
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• pp.545-565
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• 2018

A numerical code is developed based on potential flow theory to investigate nonlinear sloshing in rectangular Liquefied Natural Gas (LNG) tanks under forced excitation. Using this code, internal free-surface elevation and sloshing loads on liquid tanks can be obtained both in time domain and frequency domain. In the mathematical model, acceleration potential is solved in the calculation of pressure on tanks and the artificial damping model is adopted to account for energy dissipation during sloshing. The Boundary Element Method (BEM) is used to solve boundary value problems of both velocity potential and acceleration potential. Numerical calculation results are compared with published results to determine the efficiency and accuracy of the numerical code. Sloshing properties in partially filled rectangular and membrane tank under translational and rotational excitations are investigated. It is found that sloshing under horizontal and rotational excitations share similar properties. The first resonant mode and excitation frequency are the dominant response frequencies. Resonant sloshing will be excited when vertical excitation lies in the instability region. For liquid tank under rotational excitation, sloshing responses including amplitude and phase are sensitive to the location of the center of rotation. Moreover, experimental tests were conducted to analyze viscous effects on sloshing and to validate the feasibility of artificial damping models. The results show that the artificial damping model with modifying wall boundary conditions has better applicability in simulating sloshing under different fill levels and excitations.