• Journal of Pharmaceutical Investigation
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• v.13 no.3
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• pp.104-109
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• 1983

The effect of diluents on the dissolution rate of indomethacin was studied and the dissolution rate for the marketed products was compared to establish the quality standard for indomethacin preparation. The results are as fellows 1. The effect of test methods was not significant in the case of paddle method but was greatly effected in the case of basket method. 2. The effect of diluents was not significant generally, but in the case of starch dissolution rate was greatly effected. 3. The dissolution rate was remarkably decreased in proprotion to increase of capsule size. 4. The marketed products met the KP dissolution requirement but showed a little difference due to manufacturers.

• Proceedings of the KIEE Conference
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• 1988.07a
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• pp.723-726
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• 1988

This paper is a study about the automatic control of wheelchairs. This is realized by joystick, and is simulated by voice signal recognition. The control system by joystick is designed as follows: joystick paddle is connected with a timer and this timer ouput is high only when the joystick is moved. A computer reads the duration of this high state, and ouputs motor control word decided from this value using look-up table. The control system by voice signal is designed as follows: partial autocorrelation coefficients are computed from A/D converted signals and these values are compared with referance patterns. From this, the motor control word is decided on by the neareast neighbor rule.

• Journal of computational fluids engineering
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• v.14 no.4
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• pp.1-6
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• 2009

In the present study, numerical simulations were performed in a stirred solid/liquid system by using Eulerian multi-phase model. The transient flow field of liquid and distribution of solid particles were predicted in the stirred tank with pitched paddle impeller and baffles. The Frozen rotor method is adopted to consider the rotating motion of the impeller. The effects of number and width of baffles on the mixing time and the quality of solid suspension in the stirred tank are presented numerically. The result shows that the mixing time decreases as the width and number of baffles increase. The present numerical methodology can be applied to optimizing mixing condition of industrial mixer.

• Journal of the Korean institute of surface engineering
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• v.28 no.3
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• pp.164-173
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• 1995

Based on the potential-theory model for secondary current distribution, we could predict the thickness distributions of electroplating on patterned substrates with the different size of the auxiliary electrode. The substrates contain lithographic patterns at each sample geometry. Each sample geometry had different current distribution at the same condition except the size of the auxiliary electrodes. The size effect of the auxiliary electrode on thickness distribution of electrodeposition on patterned electrode was investigated in a series of experiments. Copper was galvanostatically deposited from an acid-sulfate solution in a reciprocating paddle cell. The thickness distributions of the workpiece scale measured by profilometry across the specimen were in good agreement with the current distribution predicted by boundary element method.

• Journal of the Korean institute of surface engineering
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• v.27 no.4
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• pp.185-192
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• 1994

The electrodeposition of permalloy thin film on various substrates was carried out using a paddle cell. The magnetic properties of film deposited were affected mostly by the Fe content in permalloy film and the effect of heat treatment in the presence of applied magnetic field was investigated. The optimum conditions for the electrodeposition of permalloy for the application of thin film head were presented in terms of iron concentration in bath and applied current density.

• Journal of the Korean institute of surface engineering
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• v.32 no.3
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• pp.423-427
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• 1999

Electroplating of 80%Ni permalloy thin plate for magnetic core materials. was studied The convected flow of electrolyte was used for stirring methode. The current density could be increased up to 250mA/$\textrm{cm}^2$ by flow cell. The composition of electroplated layer with vespect to current density and flow rate was investigated and experimental equation to predict the composition was made. How cell yielded more uniform thickness distribution than paddle cell did. The composition distribution was also studied. The thickness was the most important factor to the permeability. The permeability of 5$\mu\textrm{m}$plated permalloy was over 2000 at 1 MHz.

• Journal of the Korean institute of surface engineering
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• v.29 no.3
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• pp.195-202
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• 1996

The composition, the microstructure and the magnetic properties(HC and Hk) of Fe-Co-Ni alloy electrodeposits were investigated according to the electrolysis conditions using sulfate bath paddle agitated. The current efficiency of the alloys electrodeposition was considerably low in the range of 16∼50%. The Fe content(wt.%) of the alloy increased from 20% to 57% with current density, while Ni content of them decreased in the range of 70∼24% respectively, and Co content was nearly constant. As a result, Fe/Ni ratio of the alloy increased from 0.3 to 2.0 showing the anomalous codeposition. The structure of the alloy changed from fcc to the mixed one of fcc+bcc with the increase of Fe/Ni ratio. The preferred orientation of the alloy with fcc and bcc structure were (220) and (110) respectively. The alloy with Fe/Ni ratio(0.3∼l.2) had the lowest coercivity of 0.4∼0.8 Oe.

• Journal of Radiation Industry
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• v.7 no.2_3
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• pp.201-207
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• 2013

Soil liquefaction by tsunami or wave induced currents can cause serious damages to coastlines and coastal infrastructures. Although liquefaction caused by regular waves over sea beds has been extensively investigated, studies of tsunami-induced liquefaction near coastal area have been relatively rare. In this work, the hydraulic scale model has been designed and constructed to investigate the variations of wave height and sediment transport by tsunami. The distorted hydraulic scale model based on the Froude similarity was adopted to represent hydrodynamics and sediment transport in a coastal area. The scale model was composed of control box, screw axis, wave paddle and rotating coastal structure.

• Ocean Systems Engineering
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• v.12 no.4
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• pp.439-459
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• 2022

This paper describes experimental studies of impact pressure generated by breaking regular waves in shallow water on a vertical cylinder. Experimental work was carried out in a shallow water flume using a 1:30 - scale model of a vertical rigid circular hollow cylinder with a diameter 0.2 m. This represents a monopile for shallow water offshore wind turbines, subjected to depth induced breaking regular waves of frequencies of 0.8 Hz. The experimental setup included a 1 in 10 sloping bed followed by horizontal bed with a constant 0.8 m water depth. To determine the breaking characteristics, plunging breaking waves were generated. Free surface elevations were recorded at different locations between the wave paddle to the cylinder. Wave impact pressures on the cylinder at a number of elevations along its height were measured under breaking regular waves. The depth-induced wave breaking characteristics, impact pressures, and wave run-up during impact for various cylinder locations are presented and discussed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.51-52
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• 2023

한국해양수산개발원(KMI) 조사에 따르면, 수상레저장비 중 하나인 전기 추진 보드류 (전동서핑보드, 전동웨이크보드, 전동패들보드 등)의 경제규모는 '28년도 까지 약 59억 달러까지 성장할 것으로 예측 될 정도로 급격한 성장을 하고있는 품목으로, 국내에서도 활발하게 제조, 수입, 유통 등이 이루어지고 있다. 하지만 성능 및 안전을 평가하는 정형화된 국내외 시험 표준이 전무한 실정으로, 시험 및 검사 없이 제조사의 자체 테스트에 의존하여 시장에 출시 되고 있다. 이에 신뢰성 있는 전기 추진 보드류 안전기준(안)을 개발 및 제시함으로써 제품의 품질 및 안전성을 향상시키고, 위해사고의 예방 및 국민의 건전한 수상레저활동 확보를 위한 기반을 조성하고자 한다.