• Journal of Fashion Business
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• v.6 no.5
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• pp.12-26
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• 2002

The purpose of this study is considering about the fashion of Korean National Flag in the point of view of sociology and philosophy. The contents are the philosophy of the Korean National Flag-'Taegk', the Great Absolute in Korean philosophy, and the historical fashion trend of The Korean National Flag. The results of characteristics of The Korean National Flag are summarized as following; 1. The Korean National Flag contains 'Taegk' philosophy, the source of the dual principle 'Yn' and 'Yang'. 2. The design of 'Taegk' has been showed in Korean society traditionally. 3. The fashion of Korean National Flag dramatically is changed after Korea/Japan World cup 2002. 4. The Korean National Flag is the strong symbol of Korean society, affirmatively, same as the American National Flag.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.43 no.3
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• pp.135-140
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• 1998

Diallel analysis was conducted with FI's derived from crossing in all combinations without reciprocals among six rice varieties; three tropical japonica and three temperate japonica varieties, with different traits associated with panicle and flag leaf. Epistasis was observed in the number of primary branches (PB) per panicle and of spikelets per panicle, while flag leaf length, flag leaf color, PB length and neck node thickness were explained with the additive-dominance model. The estimated genetic mode of flag leaf length and PB length was a positive complete dominance model with high heritability, and that of flag leaf color and neck node thickness was an incomplete dominance model. In particular, tropical japonica varieties with low-tillering and heavy-panicle appear to have higher number of dominant genes for flag leaf length and PB length than temperate japonica varieties.

• 한국전산유체공학회:학술대회논문집
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• 2007.10a
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• pp.141-148
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• 2007

We present an immersed boundary (IB) method for 3D simulation of flappingflags in a uniform flow. The proposed formulation is manipulated on the basis of an efficient Navier-Stokes solver adopting the fractional step method and a staggered Cartesian grid system. A direct numerical method is developed to calculate the flag motion, with the elastic force treated implicitly. The fluid motion defined on an Eulerian grid and the flag motion defined on a Lagrangian grid are independently solved and the mass of flag is handled in a natural way. An additional momentum forcing is formulated from the flag motion equation in a way similar with the direct-forcing IB formulation and acts as the interaction force between the flag and ambient fluid. A series of numerical tests are performed and the present results are compared qualitatively and quantitatively with previous studies. The instantaneous flag motion is analyzed under different conditions and surrounding vortical structures are identified. The effects of physical parameters on the flapping frequency are studied.

• Wind and Structures
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• v.26 no.5
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• pp.279-292
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• 2018

Inspired by the energy harvesting eel, a flexible flag behind a D-shape cylinder in a uniform viscous flow was simulated by using the immersed boundary method (IBM) along with low-speed wind tunnel experimentation. The flag in the wake of the cylinder was strongly influenced by the vortices shed from the upstream cylinder under the vortex-vortex and vortex-body interactions. Geometric and flow parameters were optimized for the flexible flag subjected to passive flapping. The influence of length and bending coefficient of the flexible flag, the diameters (D) of the cylinder and the streamwise spacing between the cylinder and the flag, on the energy generation was examined. Constructive and destructive vortex interaction modes, unidirectional and bidirectional bending and the different flapping frequency were found which explained the variations in the energy of the downstream flag. Voltage output and flapping behavior of the flag were also observed experimentally to find a more direct relationship between the bending of the flag and its power generation.

• Bulletin of the Korean Mathematical Society
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• v.40 no.1
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• pp.85-89
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• 2003

Let V be a localizing infinite-dimensional complex Banach space. Let X be a flag manifold of finite flags either of finite codimensional closed linear subspaces of V or of finite dimensional linear subspaces of V. Let E be a holomorphic vector bundle on X with finite rank. Here we prove that E is uniform, i.e. that for any two lines $D_1$ R in the same system of lines on X the vector bundles E$\mid$D and E$\mid$R have the same splitting type.

• Journal of the Korean Institute of Landscape Architecture
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• v.32 no.5
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• pp.63-72
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• 2004

This study was carried out to analyze effects of soil, water level and shading on growth of sweet flag(Acorus calamus var. angustatus). Three types of soil were used, which included sandy, silty loam and paddy loam soil. Three levels of shading were applied in the experiment: no shading, 55％ shading and 75％ shading. The water levels were also adjusted to three levels in the experiment. The results are summarized as follows; 1. The cultivation of sweet flag in sandy soil with low water level resulted in decreased fresh weight compared to that at planting. This result indicates that the water level should be maintained higher than the soil surface for sweet flag growth in sandy soil. 2. 5 out of 72 sweet flags died in paddy loam soil. Water saturation of soil easily reduced paddy loam soil, and root growth of sweet flags in reduced soil condition were restricted, resulting in the dead plants. 3. The growth of sweet flag in paddy loam soil was worse than those in silty loam, indicating that reduced soil conditions in paddy loam is harmful to root growth. In planting sweet flags in paddy loam, improved soil aeration in paddy loam soil is necessary for good growth of sweet flag. 4. The maintaining of high water levels is better than that of low water levels in sweet flag cultivation. During winter, soil near the water surface froze and sweet flags in frozen soil were stressed physiologically. Maintaining high water levels prevents soil from being frozen which is good for the growth of sweet flags. 5. There was not significant difference in the growth of the sweet flag between non-shading and 55％ shading. It thus appears that sweet flags can grow soundly under shading rate lower than 55％.

• Journal of the Korean Society of Visualization
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• v.19 no.3
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• pp.31-38
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• 2021

The energy harvesting system using an inverted flag is analyzed by using an immersed boundary method to consider the fluid and solid interaction. The inverted flag flutters at a lower critical velocity than a conventional flag. A fluttering motion is classified into straight, symmetric, asymmetric, biased, and over flapping modes. The optimal energy harvesting efficiency is observed at the biased flapping mode. Using the three different machine learning algorithms, i.e., artificial neural network, random forest, support vector regression, the energy harvesting efficiency is predicted by taking bending rigidity, inclination angle, and flapping frequency as input variables. The R² value of the artificial neural network and random forest algorithms is observed to be more than 0.9.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.4
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• pp.71-76
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• 2014

In this paper, we propose a SMMA(Sliced-Multi Modulus Algorithm) adaptive blind equalization algorithm with Flag for high order QAM system. SMMA has improved characteristics by applying the multi contour to MMA. However, SMMA still has a limit that the mismatch problem causes the residual error in the steady state is large. In order to significantly reduce the residual error in the steady state, we propose SMMA, which is controlled by the binary Flag of '1 'or '0' obtained from SMMA and a decision-directed algorithm, and analyze the performance of the proposed algorithm. By computer simulation, it is confirmed that the proposed algorithm has improved performance highly in terms of a residual ISI and a residual error in the steady state compared with MMA and SMMA.

• Journal of the Korean Society of Costume
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• v.59 no.3
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• pp.1-13
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• 2009

The purpose of this study is to discuss the modern fashion design that incorporates national flags, by each country, methods of their expressions and distinct characteristics. Moreover, it intends to contribute in creating the image of Korea and our own unique fashion identity through creative designs that coincides with the modern trend by adopting Taegeukgi. The results of this study can be summarized as follows: The American flag and the British Union Jack were molt widely used and even though it was less frequent, flags of the France, Korea, Israel, Germany as well as Argentina have been featured in modern fashion. The expression methods also varied and it demonstrated the unlimited options as to how a flag can be presented. Some used the traditional flag as is. Some only used a portion of a flag or its colors as a motive or sometimes the flags were completely redesigned. There are distinctive characteristics when flags are incorporated into fashion. First, the shapes or colors of the flags were used to emphasize the image of a country in rather simple silhouette without many details. Second, through altered shapes, shades, colors or rearrangement, the country's image is presented in more subtle, indirect manner. Third, a flag is a mere element of a formation with various changes to its shape or color, and it no longer holds the traditional significance of a flag. It may also represent the playful or ironic image by combining with other items or execution techniques.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2006.06a
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• pp.141-142
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• 2006

In relation to the determination of the appropriate choice of law in most of the maritime law issues, 'the law of the flag' or 'the law of the ship's nationality' is commonly used to apply to several provisions which is imposed in Korean Private International Law. But the theory of the law of the flag or ship's nationality suffers from serious problems in case of flag of convenience which is a flag flown by a vessel registered in one state, with which the vessel has few or no connections, while in reality the vessel is owned in or operated from another state. In this case, the article 8 of Korean Private International Law which stipulates the Exception of Choice of Law Clause can be applied to this matter, and thus it is essential to consider many factors which can be used in determining the applicable law through the most significant relationship or genuine link theory.