• Journal of Electrical Engineering and Technology
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• 제12권3호
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• pp.1211-1218
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• 2017

In this paper, performance of rectangular shaped magnetic power pads for inductive power transfer (IPT) system according to ferrite structure is analyzed. In order to evaluate the influences of ferrite structure, six cases of magnetic power pads are proposed. Self-inductance, coupling coefficient, quality factor, and coil to coil efficiency are compared as the displacement increases in the direction of x or y axis. For accurate estimation, finite element method (FEM) simulation is used and loss components of the power pads are numerically calculated and considered. Through the simulation and measured results, effectiveness of protrusive and enveloping ferrite structure is identified.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall
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• pp.137-146
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• 1999

The SSI(Soil-Structure Interaction) analyses are being performed for the KNGR(Korean Next Generation Reactor) design because the KNGR is developed as a standard nuclear power plant concept enveloping various soil conditions. the SASSI program which adopts the flexible volume method is used for the SSI analyses. The soil curves used in the three dimensional SSI analyses of KNGR Nuclear Island(NI) structures are based on the upper bound shear modulus curve and lower bound damping degradation on SSI response the average shear modulus curve with average damping curve was used for two soil cases. This study presents the results of the variances by using different soil nonlinearity parameters based on the paametric SSI analyses. The results include the maximum member forces(shear and axial force) at the base of the NI structures and the 5% damping Floor Response Spectra (FRS) at some representative locations at the top of the NI superstructures. They are also compared together with the enveloped SSI results for eight soil cases and fixed-base analysis for rock case by using two control motions.

• 수산해양기술연구
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• 제40권1호
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• pp.1-8
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• 2004

외줄낚시에 대한 대문어의 조획기구를 알아내고, 낚시를 개량하기 위하여 수조에서 외줄낚시어구에 대한 대문어의 행동패턴을 비디오카메라로 관찰 조사하였다. 대문어는 돌진하거나 천천히 유영하며 미끼를 잡았다. 돌진할 때에는 두개의 팔로 미끼를 잡은 후 약간 뒤로 물러서서 정지하였고, 천천히 접근 할 때는 한 개의 팔로 미끼를 잡은 후 그 자리에 정지하여 섭이하는 행동을 보였다. 조획은 약간 뒤로 물러서서 섭이할 때보다 그 자리에 정지할 때가 많았다. 평균 체중 1kg의 대문어가 정어리, 대문어, 돼지비계 등을 전량 섭이하는데 소요되는 시간은 각각 1~30분 , 10~50분 , 50분~1시간 이상으로서 미끼의 육질이 질길수록 대문어가 미끼를 섭이하는데 장시간 소요되었다. 조획성능에서는 낚시의 채가 긴 A형낚시보다 채가 짧은 B형낚시가 양호하였으나 어체로부터 낚시를 탈락시키는 데는 B형낚시보다 A형낚시가 용이하였다.

• The International Journal of Costume Culture
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• 제4권2호
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• pp.138-145
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• 2001

This study aims to compare the beauty of costume in the Gothic with that of Renaissance periods. By analyzing the beauty of costume which reflects the ideal of the age, this study attempts to provide the insight which can predict the beauty of future costume The characteristics of Gothic costume is the from of the loose enveloping of the body, which can be accounted for from the influence the Christian religion, and the emphasis on the vertical line influenced by the steeple in the Gothic architecture expressing the enthusiasm of the religion. The emphasis on height in the Gothic cathedrals was reflected in the hennin, pointed shoes, and lengthy sleeves of Gothic dress. The beauty of Gothic costume lies in the from of slender, the emphases on the vertical line, the we of heraldry and parti-color, and pointed hat and shoe. The Renaissance architecture shows a broad horizontal appearance. There is the similarity between the Renaissance costume and Renaissance architecture. The beauty of Renaissance costume lies in the form of the exposing body, the exaggerated silhouette, the emphasis on the horizontal line, the use of ruff and slash in order to display the beauty of human body and the beauty of cubic. The ideal beauty of Gothic and Renaissance costume was influenced by the spirit the age and was in contrast.

• 한국실내디자인학회논문집
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• 제36호
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• pp.14-21
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• 2003

The Propose of this research was to consider how the New Media Architecture was applied to contemporary architecture according to the analysis of the design method process of Toyo Ito. Sendai Mediatheque by Toyo Ito stands as one of the most symbolic statement In New Media architecture. The four principal architectural elements of the Mediatheque are the digital image, the continuous space, the tube, and the skin facade. The digital image express forms of communication, person-to-person and person-to-thing, and they vary according to the media utilized on each level. The three skin elements of the Mediatheque are a double skin of MPG, skin of louvers, skin of fine-floor decking. The tubes act as columns while enveloping light, air, water, electricity the passage of people, as well as the means of transferring material. The thirteen tubes of different sizes prevent the erection of wall and suggest places instead of rooms. Instead of being limited to certain specified actions in clearly defined rooms, people are free to choose places for their actions in the continuous space.

• Steel and Composite Structures
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• 제15권3호
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• pp.281-298
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• 2013

Composite special moment frame is one of the systems that are utilized in areas with low to high seismicity to deal with earthquake forces. Composite moment frames are composed of reinforced concrete columns (RC) and steel beams (S); therefore, the connection region is a combination of steel and concrete materials. In current study, a three dimensional finite element model of composite connections is developed. These connections are used in special composite moment frame, between reinforced concrete columns and steel beams (RCS). Finite element model is discussed as a most reliable and low cost method versus experimental procedures. Based on a tested connection model by Cheng and Chen (2005), the finite element model has been developed under cyclic loading and is verified with experimental results. A good agreement between finite element model and experimental results was observed. The connection configuration contains Face Bearing Plates (FBPs), Steel Band Plates (SBPs) enveloping around the RC column just above and below the steel beam. Longitudinal column bars pass through the connection with square ties around them. The finite element model represented a stable response up to the first cycles equal to 4.0% drift, with moderately pinched hysteresis loops and then showed a significant buckling in upper flange of beam, as the in test model.

• Parasites, Hosts and Diseases
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• 제26권2호
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• pp.127-132
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• 1988

이형흡충류의 하나인 Stictodora속 흡충 2마리가 구충제 및 하제를 투여한 24세 남자환자의 설 사변에서 검출되었다. 총체는 길이 0.90∼0.98 mm, 폭 0.38 mm로 소형이며 특이한 복흡반-생식만(ventrogenital) 장치가 있고 생식공과 별개인 gonotyl(12∼15개의 미소한 갈고리 보유)을 가지고 있었다. 충체는 형태학적으로 Stictodora fuscatum(Onji and Nishio, 1916)과 매우 비슷하였으나 다수의 충체를 획득할 때까지 확정적인 종 동정은 보류하였다. 환자는 숭어, 농어 등 반염수산 어류를 즐겨 생식한다고 하였다. 이들이 Stirtodora sp.는 물론 따로 보고한 3종류 이형홉충의 감염원이었을 것으로 추측된다. 이 중례는 문헌상 Stictodora속 홉충의 최초 인체기생례에 해당된다.

• 한국자동차공학회논문집
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• 제5권1호
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• pp.216-216
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• 1997

We developed the durability estimation and design systems to minimize the volume, considering the durability, efficiency, and design requirements of worm gears. That is, we consider each kind of factors affecting on durability on the basis of AGMA Standard for the cylindrical and double-enveloping worm gears. We also estimate input power on the basis of wear and durability, bending strength and deflection of worm shaft, and we developed the durability estimation and design systems of power transmission worm gears introducing the optimal design method on the personal computer to be easily used in field. Also, we developed a method which converts the design variables obtained from the optimal design method to integer values(number of worm threads, number of worm threads, number of worm wheel teeth, etc.,) to be used in real design and production. The developed durability estimation and design method can be easily applied to the design of worm gears used as power transmission devices in machineries and is expected to be used for weight minimization of worm gear unit.

• 한국전산유체공학회지
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• 제11권4호
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• pp.75-80
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• 2006

Navier-Stokes simulation of the flow in a micro viscous pump is carried out. The micro viscous pump consists of a rotating circular rotor placed in a two dimensional channel. All simulation is carried out by using a finite volume approach, at the Reynolds number of 0.5, to study the performance of the micro viscous pump. Length of channel of the pump is varied to simulate the effects of the pumping load. Numerical solutions show that the net flow of the pump is realized by two counter rotating vortices formed on both sides of the rotor. The volume flow rate of the pump is decreased as length of the channel is increased, while the static pressure difference across the rotor is increased. The static pressure difference across the rotor is observed to be inversely proportional to the volume flow rate as inertia effects are negligibly small. The efficiency of the pump is found to reach a maximum when two counter rotating vortices on both sides of the rotor becomes to merge forming an outer enveloping vortex.

• Smart Structures and Systems
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• 제22권2호
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• pp.239-247
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• 2018

A magnetic flux leakage (MFL) method was applied to detect and quantify defects in a steel bar. A multi-channel MFL sensor head was fabricated using Hall sensors and magnetization yokes with permanent magnets. The MFL sensor head scanned a damaged specimen with five levels of defects to measure the magnetic flux density. A series of signal processing procedures, including an enveloping process based on the Hilbert transform, was performed to clarify the flux leakage signal. The objective damage detection of the enveloped signals was then analyzed by comparing them to a threshold value. To quantitatively analyze the MFL signal according to the damage level, five kinds of damage indices based on the relationship between the enveloped MFL signal and the threshold value were applied. Using the proposed damage indices and the general damage index for the MFL method, the detected MFL signals were quantified and analyzed relative to the magnitude of the damage increase.