• Korean Chemical Engineering Research
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• v.46 no.2
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• pp.436-442
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• 2008

Organic-inorganic hybrid mesoporous anion-exchange resins were prepared for the adsorption of anions from aqueous solutions. The prepared samples were characterized using nitrogen adsorption-desorption measurements, Fourier transform infrared (FTIR) spectroscopy, and elemental analyses. Batch and kinetic experiments were performed to examine the anion-exchange performances of the prepared samples. Among the prepared samples, the hybrid mesoporous anion-exchange resins functionalized with tributylammonium groups showed higher adsorption capacities for perrhenate ions than did the resin functionalized with trimethylammonium groups. The surfactant, hexadecylamine, which had hydrophobic alkyl chains, also showed affinity for hydrophobic perrhenate anions.

• Journal of architectural history
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• v.25 no.1
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• pp.69-83
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• 2016

Classic rationalist architecture came to play an important role in modern architectural discourse in the 1970s. But it has declined since the death of its most representative architects Aldo Rossi and O. M. Ungers. However, the phenomenon to be noted is that a new momentum was brought to the German architectural scene through some remarkable achievements by the disciples of Ungers after 2000. This study aims to read this phenomenon on the topography of german architecture and to catch out what potential it has to create balance in the international architectural debate. It is not the aim to analyze a single architect in detail, but to compare some important architects like Hans Kollhoff, Max Dudler, Eun-Young Yi and Uwe $Schr{\ddot{o}}der$. And further the study will try to give an overview of how far this phenomenon can change the topography of the German architectural scene. The buildings that have been examined here are Daimler Chrysler Building, Grimm Zentrum, Stuttgart City Library, and Haus Hundertacht. Through this study, it was found that some architects continue the attitude and the architectural languages of O. M. Ungers and develope their own unique architecture. And this phenomenon has the potential to influence todays architectural debate on a global scale.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.31 no.3 s.258
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• pp.365-372
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• 2007

Revisited in this paper are Green's functions for unit concentrated forces in an infinite orthotropic Kirchhoff plate. Instead of obtaining Green's functions expressed in explicit forms in terms of Barnett-Lothe tensors and their associated tensors in cylindrical or dual coordinates systems, presented here are Green's functions expressed in two quasi-harmonic functions in a Cartesian coordinates system. These functions could be applied to thin plate problems regardless of whether the plate is homogeneous or inhomogeneous in the thickness direction. With a composite variable defined as $z=x_1+ipx_2$ which is adopted under the necessity of expressing the Green's functions in terms of two quasi-harmonic functions in a Cartesian coordinates system Stroh-like formalism for orthotropic Kirchhoffplates is evolved. Using some identities of logarithmic and arctangent functions given in this paper, the Green's functions are presented in terms of two quasi-harmonic functions. These forms of Green's functions are favorable to obtain the Newtonian potentials associated with defect problems. Thus, the defects in the orthotropic plate may be easily analyzed by way of the Green's function method.

• Journal of Korean Ophthalmic Optics Society
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• v.8 no.1
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• pp.85-90
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• 2003

A Netspec lens has the form having the 2-dimensional mesh coating on a general ophthalmic lens. It is known that it makes the ophthalmic image see more clearly, reducing the ophthalmic fatigue and that the transmittance of it for ultraviolet and infrared rays is lower. We need to prove this characteristic scientifically. So, in this study, we applied the Kirchhoff's scalar wave theory to the Netspec lens and induced a transmittance expression. And we made the program of which simulation can explain the transmittance effect of the Netspec lens. Also, we tried the interpreting about the result of the simulation. Finally, we have known that this simulation program can be used to adjust the transmittance of the light according to the wavelength.

• The Korean Journal of Applied Statistics
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• v.26 no.3
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• pp.495-509
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• 2013

We study multivariate extension of Kendall's tau and its statistical interpretation. There exist various versions of multivariate Kendall's tau, for example Scarsini (1984), Joe (1990) and Genest et al. (2011); however, few of them mention its lower bounds. For the bivariate case, the Fr$\acute{e}$chet-Hoeffding lower bound can achieve the lower bound of Kendall's tau. However in the multivariate case, the Fr$\acute{e}$chet-Hoeffding lower bound itself does not exist as a distribution, which makes the interpretation of Kendall's tau unclear when it has negative value. In this paper, we explain sufficient conditions to achieve the lower bound of Kendall's tau and provide real data examples that provide further insights into the interpretation for the lower bounds of Kendall's tau.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.5
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• pp.1064-1069
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• 2013

In this paper, we propose a Musical Score Recognition with SOM and Enhanced ART-1 Algorithm. First, we apply Hough transform and Otsu's binarization to the original BMP format image and extract notes from separated passages by histogram analysis with removing staff lines. Then extracted musical notes are normalized to same size by SOM algorithm and ART-1 algorithm plays the learning and recognition role. The experiment verifies that the proposed method is quite effective on printed musical score recognition.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.11b
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• pp.799-804
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• 2001

Nonlinear normal mode (NNM) vibration, in a nonlinear dual mass Hamiltonian system, which has 6th order homogeneous polynomial as a nonlinear term, is studied in this paper. The existence, bifurcation, and the orbital stability of periodic motions are to be studied in the phase space. In order to find the analytic expression of the invariant curves in the Poincare Map, which is a mapping of a phase trajectory onto 2 dimensional surface in 4 dimensional phase space, Whittaker's Adelphic Integral, instead of the direct integration of the equations of motion or the Birkhotf-Gustavson (B-G) canonical transformation, is derived for small value of energy. It is revealed that the integral of motion by Adelphic Integral is essentially consistent with the one obtained from the B-G transformation method. The resulting expression of the invariant curves can be used for analyzing the behavior of NNM vibration in the Poincare Map.

• Journal of Advanced Navigation Technology
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• v.14 no.6
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• pp.1002-1009
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• 2010

I made the axon to the electrical transmission model and then constructed electrical equivalent model using Kirhhoff's current law and voltage law in this paper. I calculated various axon parameters in order to analyze the electrical potential hehavior versus minute distance chang of axon. The transmission velocity of unmyelinated nerve is proportional to square root of axon diameter, while that of myelinated nerve is directly proportional to its diameter. Because the transmission of myelin sheath is independent of voltage unlike unmyelinated sheath, the Hodgkin-Huxley model across the membrane is not so precise.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.377-378
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• 2022

본 연구는 폐그물, 폐현수막, 비닐, 캔 등을 활용한 친환경 패션 소품을 제작하기 위한 선행연구로, 패션산업에서의 환경문제와 친환경 패션 브랜드에 대해 분석해보고자 하였다. 이를 통해 친환경 패션 소품 제작에 필요한 기초자료를 얻고자 하였다. 연구는 국내 포털사이트에서 '친환경 패션 브랜드', '패션산업의 환경오염' 등의 단어를 입력하여 검색되는 기사를 중심으로 진행되었다. 패션산업은 생산과 소비 과정에서 수질, 대기오염을 유발하며, 쓰레기 문제 등을 유발하였다. 제조과정 중 엄청난 양의 탄소를 발생시키며, 세탁과정에서는 미세플라스틱을 방출하여 수질을 오염시키는 것으로 나타났다. 친환경 패션 브랜드에 글로베 호프, 프라이탁, 스텔라 맥카트니, 파타고니아, 비건 타이거, 낫 아워스 등이 있다. 광고 현수막, 군복, 안전벨트, 공장작업복, 병원 이불, 보트의 돛, 자동차 방수포 등을 활용하여 다양한 가방, 파우치, 핸드백 등의 패션 아이템을 제작 판매하고 있다. 이 외에도 비건 소재를 사용하고 동물성 소재와 PVC 소재를 사용하지 않는 등 패션업계에서도 환경오염을 줄이기 위한 다양한 노력을 기울이고 있는 것으로 나타났다.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.46 no.3
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• pp.143-151
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• 2009

In this paper, a new extraction algorithm for artificial structure in 3D cloud points of terrestrial LIDAR is described, considering that various obstacles in terrestrial LIDAR make it difficult to apply conventional algorithms which are designed for air-born LIDAR data. Firstly we use the R, G, B color information from the terrestrial LIDAR data to discriminate among the massive 3D cloud points. Hough transform is then applied to estimate the straight lines that correspond to the target structure. Finally, the structure is extracted by comparing the distance between the estimated line and 3D cloud points. The proposed algorithm is efficient in the sense that it requires the user interaction only when the reference colors are obtained. Computer simulation shows the performance to be quite satisfactory.