• Journal of Pharmaceutical Investigation
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• v.33 no.1
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• pp.67-71
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• 2003

Drug excipients are material used in the formulation of pharmacologically active drugs. They have a variety of roles including dilutents/fillers/bulking agents, binders/adhesives, propellant, disintegrants, lubricants/dlidants, colors, flavors, coating agents, polising agents, fragrance, sweeteening agent, polymers and waxes. Excipient should be inert or inactive and does not interfere with the test. Nowadays within industry there has been a recent surge of interest in novel excipient for novel dosage forms. The purpose of the review is to introduce the administration systems of drug excipient about kinds, matters to be attended to change of excipients.

• Journal of Biomedical Engineering Research
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• v.12 no.4
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• pp.285-294
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• 1991

Two types of the speech signal processores (SSP) for the cochlear a prosthesis are designed. One is designed using the cochlear model and the other is designed using the information (formant, pitch, intensity) extraction method. For these, some cochlear model and acoustic information extraction method are proposed. The result shows the SSP of the cochlear model type contain more acoustic cues than that of information extraction type. On the other hand, stimulus signal is clear and algorithm is simple in the SSP of the information ex traction type.

• Proceedings of the KOSOMBE Conference
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• v.1992 no.05
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• pp.167-170
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• 1992

본 논문에서는 감각성 난청자들이 정상인들과 유사한 음성 인식을 하도록 청각 보철 기기를 구성하였다. 음성의 포먼트를 추출하기 위해서는 PLP(Perceptual Linear Prediction) 방식을 이용하였으며, pitch 추출을 위해서는 3 단계 클리핑 함수를 이용한 자기 상관법을 이용하였다. 또한 다중 채널 - 다중 전극 방식을 이용하여 내이의 헤어셀에 17 개의 전극을 삽입하여 신호를 가하는 시뮬레이션을 하였다. 실험에 사용한 데이타는 모음 /a/, /e/, /i/, /o/, /u/로 전모음과 후모음의 차이를 구별하였으며 두번째 포먼트의 변화와 포먼트 통합 이론에 대한 검증을 하였다.

• ETRI Journal
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• v.34 no.1
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• pp.106-109
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• 2012

In this letter, we propose a new prediction block filter that can reduce errors between the original and prediction blocks. The proposed filter adaptively adjusts filter coefficients by using the previously reconstructed adjacent blocks and their prediction blocks. Then, the filter is selectively applied to the current prediction block according to the rate-distortion optimization. Moreover, since the same filter coefficients can be derived in the decoder, they are not encoded into the bit-stream. The proposed method achieves a 4.65% bitrate saving on average compared with H.264/AVC.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1364-1365
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• 2008

가스 절연 개폐장치(Gas Insulated Switchgear)의 고체 스페이서에 다양한 유전율 분포를 가진 경사기능성 재료(Functionally Graded Material)를 적용할 때, 전계의 완화를 예상할 수 있다. FGM 스페이서는 전계의 집중을 완화시킬 수 있고, 내부의 전계를 더 균일하게 분포시킬 수 있다. 본 연구에서는 유한요소법을 이용하여 상용 GIS의 FGM 스페이서에서 전계의 세기를 계산하였다. 계산 결과를 통해 스페이서의 유전율이 빠르게 변화하는 경우, 더 효율적으로 최대전계를 감소시켰고, 스페이서 내부의 전계를 균일하게 하였다. 결과적으로 FGM 스페이서는 단일 유전율을 가진 스페이서에 비해 절연 성능을 향상시킬 수 있다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1366-1367
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• 2008

구형 집속 빔 핵융합 장치에서 발생되는 중성자 생성률은 이온전류의 크기에 크게 의존한다. 본 논문에서는 이온전류의 크기를 증가시키기 위해 구조 설계에 주로 이용되는 다구찌 실험계획법을 이용하여 최적의 설계 조건을 계산하였다. 최적화를 위해 그리드 음극 형상의 결정인자 및 압력을 설계 변수로 선택하였고, 설계변수가 이온전류의 크기에 미치는 영향력을 분석하여 최적의 조건을 도출하였으며, 예측된 최적 조건 변수값을 적용하여 효과를 검증하였다. 최적 모델로부터 더 큰 이온전류를 얻을 수 있었으며, 이는 더 깊은 포텐셜 우물에서 측정되었다.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1496-1499
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• 2009

A diode-pumped Nd:$YVO_4$ laser was used to obtain indium tin oxide (ITO) patterns on glass substrate with various overlapping rates. The results showed that the overlapping rate of laser beam influences on the edge structure of ITO pattern and the surface roughness of ablated groove bottom. At a laser repetition rate of 40 kHz, the optimized condition of overlapping rate was 75 %.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.197-198
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• 2019

The aim of the research is evaluating the feasibility of inspection for early age frozen damage and for expansion of concrete under the various time periods of -20℃ temperature condition. When the concrete samples were exposed for 12 hours and 24 hours, the frozen depth of the concrete were 10 and 60 mm, respectively, under the wet conditions. From the experiment results of temperature and expansion, only surface area suffered frozen damage for 12 hours exposing conditions while entire area suffered frozen damage for 24 hours exposing conditions.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.199-200
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• 2019

The purpose of the research is assessing the possibility of strength recovery for mortar added with accidently high amount of fly ash. For compressive strength at 28 day, the sample painted with sodium hydroxide showed higher compressive strength than the sample painted with calcium hydroxide. Regarding the curing conditions, the curing temperature 65℃ provided better conditions than the curing temperature 20℃ in aspect of solution penetration depth and reactivity of fly ash. In the case of drying after saturation, the case painted with sodium hydroxid 65℃ showed the clearest engrossing mark.

• Journal of the Optical Society of Korea
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• v.16 no.3
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• pp.299-304
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• 2012

A high angular tolerance spectral filter was realized incorporating an etalon, which consists of a $TiO_2$ cavity sandwiched between a pair of Ag/Ge mirrors. The effective angle was substantially extended thanks to the cavity's high refractive index. The device was created by embedding a 313-nm thick $TiO_2$ film in 16-nm thick Ag/Ge films through sputtering, with the Ge layer alleviating the roughness and adhesion of the Ag layer. For normal incidence, the observed center wavelength and transmission were ~900 nm and ~60%, respectively; throughout the range of $50^{\circ}$, the relative wavelength shift and transmission variation amounted to only ~0.06 and ~4%, respectively.