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실리카 분말이 코팅된 수처리용 규조토계 세라믹 필터의 특성평가
배병서,하장훈,송인혁,한유동,Bae, Byung-Seo,Ha, Jang-Hoon,Song, In-Hyuck,Hahn, Yoo-Dong 한국분말야금학회 2014 한국분말재료학회지 (KPMI) Vol.21 No.1
In this study, diatomite based materials were investigated as a support filter for silica particle coating. The silica sol for coating was synthesized by a st$\ddot{o}$ber process. The diatomite support was dry-pressed at 10 MPa and sintered at $1200^{\circ}C$ for 1 hour. The coating sol was prepared as a mixture of EtOH and silica sol. The diatomite support was coated by a dip-coating process. Silica coated diatomite filter was sintered at $1000{\sim}1200^{\circ}C$ for 1 hour. The largest pore size was decreased with increasing concentration ratio of coating sol. The gas and water permeability of silica coated diatomite decreased with increasing of concentration ratio of the coating sol.
구병삼,유동화,이규완,나중열,홍성봉,배인하,Ku, Pyong-Sahm,Yoo, Dong-Wha,Lee, Kyu-Won,Rha, Joong-Yul,Hong, Sung-Bong,Bae, In-Ha 대한생식의학회 1986 Clinical and Experimental Reproductive Medicine Vol.13 No.2
We have reviewed 59 cases of patients amoung 65 cases who underwent IVF and ET with reasonable indications irom 1984 and the results as follows. 1. Major indications for IVF and ET were tubal factor (40.7%), unexplained infertility (25.4%), endometriosis (15.3%), failed AID and AIH (10.1 %), and sperm abnormality (8.5%). 2. For superovulation of human oocytes, l00mg of clomiphene citrate and 75 IU of HMG used. The monitoring of oocyte maturation was bone by ultrasound examination and serum 17-${\beta}$ estradiol, LH values. The peak $E_2$ value was 956.36${\pm}$702.13 pg/ml. 3. The oocytes were obtained by laparoscopy 24-36 hours after the injection of HCG. 4. The mean numbers of follicles at laparoscopy was 3.06 and the successful rate of laparoscopy was 79.7%. 5. And 165 follicles were aspirated from which 98 oocytes were recovered, 59.4% of all follicles had at least one oocyte aspirated. 21.4% of the eggs were mature, 52.0% were moderate, 26.5%. were immature. 6. 67.3% of oocytes were cleaved and were transferred at 4-6 cell stages. 7. Four pregnancies including one chemical pregnancy and one spontaneous abortion were established by ${\beta}$-subunit, u-hCG and ultrasound examinations.
디지털 보청기의 성긴 궤환경로 보상을 위한 부밴드 적응필터
손상욱(Sang-Wook Sohn),임영빈(Young-Bin Lim),윤재준(Jae-Jun Youn),유동구(Dong-Gu Yoo),배현덕(Hyeon-Deok Bae) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
디지털 보청기의 음향궤환 경로인 벤트는 임펄스 응답이 성긴특성을 가진다. 성긴 임펄스 응답 시스템에 적합한 적응 알고리즘으로는 IPNLMS가 유용한 것으로 알려져있다. 본 논문에서는 디지털 보청기의 벤트에 의한 음향궤환을 제거하기위해 부밴드 IPNLMS을 제안한다. 그리고 보청기에서 중요한 난청 보상필터도 대역별로 설계하여 부밴드 궤환제거에 활용한다. 제안기법의 성능을 전밴드 IPNLMS와 SNLM와 비교하여 성능을 입증한다.