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이규호,유정원,김상욱,정왕용,이원현,이상락,Lee, Kyu-Ho,Yu, Jung-Won,Kim, Sang-Wook,Jung, Wang-Yong,Lee, One-Hyun,Lee, Sang-Rak 한국축산환경학회 2014 한국축산시설환경학회지 Vol.20 No.4
This study was conducted to investigate the effect of weaning period on the vocalization frequency of Hanwoo calf. Twelve Hanwoo calves were allocated into 4 groups, control (forced weaning on 90days) and treatment (weaning on 70, 90 and 120days with 5 adaptation days). After weaning, behavior and vocalization of Hanwoo calves were recorded on 3 consecutive days with closed circuit television (DTC-R5254, Digite Co., Ltd., Korea) and digital audio tape recorder (SR-900, Idamtech Co., Ltd., Korea). Vocalization frequency of Hanwoo calf were not significance difference with control and treatment group. Thus, additional studies of feed intake and body weight gain were needed to determine the weaning period of Hanwoo calves.
이규호,김덕교 ( K . H . Lee,D . K . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.4
To serve as a basic information in using domestic fish meals instead of imported one in chick ration, two feeding trials were carried out with broilers for eight weeks each. 1. The content of crude protein and essential and non-essential amino acids except valine in the foreign fish meal was superior to that of ten kinds of domestic fishes.(Harengula zunasi, Chasmichthys gulosus, Clupanodon punctatus, Arctoscopus japonicus, lagre anchovy, medium anchovy, small anchovy, anchovy heads, fish heads and mixed fishes). 2. No statistical differences were noted among 5 domestic fishes (Harengula zunasi, Chasmichthys gulosus, medium anchovy, small anchovy and mixed fishes), 7 domestic fish meals (Arctoscopus japonicus, Harengula zunasi, Engraulis japonica, Ammodytes personatus, Trichiurus haumela, Monacanthus cirrhifer and small Alaska pollack.) and imported fish meal in weight gain, feed consumption and feed efficiency. It was thus concluded that all of the domestic fishes and fish meals used in these experiments were just as effective as the imported one when used to supply comparable amounts of protein in broiler rations.
주파수 영역에서의 Gaussian Mixture Model 기반의 동시통화 검출 연구
이규호,장준혁,Lee, Kyu-Ho,Chang, Joon-Hyuk 한국음향학회 2009 韓國音響學會誌 Vol.28 No.4
In this paper, we propose a novel method for the cross-correlation based double-talk detection (DTD), which employing the Gaussian Mixture Model (GMM) in the frequency domain. The proposed algorithm transforms the cross correlation coefficient used in the time domain into 16 channels in the frequency domain using the discrete fourier transform (DFT). The channels are then selected into seven feature vectors for GMM and we identify three different regions such as far-end, double-talk and near-end speech using the likelihood comparison based on those feature vectors. The presented DTD algorithm detects efficiently the double-talk regions without Voice Activity Detector which has been used in conventional cross correlation based double-talk detection. The performance of the proposed algorithm is evaluated under various conditions and yields better results compared with the conventional schemes. especially, show the robustness against detection errors resulting from the background noises or echo path change which one of the key issues in practical DTD. 본 논문에서는 주파수 영역에서의 가우시안 혼합 모델 (Gaussian Mixture Model, GMM) 기반의 새로운 동시통화 검출 (Double-talk Detection, DTD) 알고리즘을 제안한다. 구체적으로 주파수 영역에서의 음향학적 반향억제 (Acoustic Echo Suppression, AES)를 위한 동시 통화 검출 알고리즘을 구성하기 위해 기존의 시간 영역에서의 동시통화 검출에 사용되는 상호 상관계수를 이산 푸리에 변환을 통해 16개 채널의 주파수 영역으로 변환하였다. 이러한 주파수 영역에서의 상호 상관계수를 GMM의 보다 효과적인 구성을 위해 통계적 분류 특성에 근거하여 우수한 7개를 선별하였다. 본 논문은 이러한 특징 벡터로 패턴인식에서 우수한 성능을 보이는 GMM을 구성하였으며 원단화자만 있는 구간, 동시통화 구간, 근단 화자만 있는 구간을 우도 (Likelihood) 비교에 따라 분류함으로써 별도의 원단 화자 신호에 대한 음성 검출기 (Voice Activity Detector, VAD)의 사용 없이 잡음환경과 반향 경로 변화에서 강인한 동시통화 검출 알고리즘을 제안한다. 다양한 실험 결과 제안된 방법은 기존의 상호 상관계수를 고정된 문턱 값과 가부 비교하여 동시 통화 구간을 검출하는 hard decision 방법에 비해 검출 오류 확률 (Detection Error Probability)을 비교한 결과 우수한 성능을 보였다.
이규호,김경환,Lee, Kyu-Ho,Kim, Kyung-Hwan 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.2
In this research, we prepared Ga doped zinc oxide(ZnO:Ga, GZO) targets each difference sintering temperature $700^{\circ}C$, $800^{\circ}C$, and doping rate 1 wt.%, 2 wt.%, 3 wt.%. The characteristics of thin film on glass substrates which deposited by facing target sputtering in pure Ar atmosphere are reported. Ga doped zinc oxide film is attracted material through low resistivity, high transmittance, etc. When prepared target powder's structure was investigated by scanning electron microscope, densification and coarsening by driving force was observed. For each ZnO:Ga films with a $Ga_2O_3$ content of 3 wt.% at input power of 45W, the lowest resistivity of $9.967{\times}10^{-4}{\Omega}{\cdot}cm$ ($700^{\circ}C$) and $9.846{\times}10^{-4}{\Omega}{\cdot}cm$ ($800^{\circ}C$) was obtained. the carrier concentration and mobility were $4.09{\times}10^{20}cm^{-3}$($700^{\circ}C$), $4.12{\times}10^{20}cm^{-3}$($800^{\circ}C$) and $15.31cm^2/V{\cdot}s(700^{\circ}C)$, $12.51cm^2/V{\cdot}s(800^{\circ}C)$, respectively. And except 1 wt.% Ga doped ZnO thin film, average transmittance of these samples in the range 350-800 nm was over 80%.
국산박류의 사료적 가치에 관한 연구 9 . 제독피마자박의 사료가치에 관한 시험
이규호,한인규,정천용 ( Kyu Ho Lee,In K . Han,Chon Yong Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.2
This experiment was carried out using 440 broiler chicks to study the nutritive value of detoxicated castor bean meal for about 75 days when it was used in broiler rations. The castor bean meal used in this experiment was detoxicated by the method of autoclaving at 120℃ and 1㎏/㎠ pressure and then water treatment. The results obtained are summarized as follows: 1. The body weight gains were significantly different (P$lt;0.01) among treatments. Data revealed that the body gain was decreased as the level of castor bean meal increased in feed. The treatments 6, 10, 9, 2 and 3 containing the castor bean meal less than 5% in their rations were not significantly different with control group in body weight gain. 2. The weight gain of treatments 5 containing the castor bean meal up to 20% was significantly inferior to the ether treatments and some birds in this treatment have shown coma symptom during 1-2 weeks of age. 3. Feed required per ㎏ of body weight gain were significantly increased (P$lt;0.05) as the level of castor bean meal increased. However, among the treatments substituting castor bean meal for perilla oil meal or sunflower seed oil meal differences were not significant in feed efficiency. 4. The content of crude protein, crude fat and crude fiber of castor bean meal was 37.5%, 6.7% and 26.8%, respectively. Amino acid composition of castor bean meal was relatively superior to sunflower seed oil meal, similar to perilla oil meal and inferior to soybean meal. 5. It was found that the utilizability of dry matter, crude protein, crude fat and total carbohydrates of finisher diets were depressed as the level of castor bear meal increased in feeds. 6. The carcass rate was decreased (P$lt;0.05) in same trend as weight gain did and the carcass rate of treatment 5 was significantly inferior to the other treatments. 7. The values of thyroid gland weight, skin pigmentation score and serum cholesterol content were no significantly affected by the feeding castor bean meal.
육용 종계의 영양소 요구량에 관한 연구 2 . 육용 종계의 단백질 요구량에 관한 연구
이규호,한인규,이상진,강태홍,김강식 ( K . H . Lee,I . K . Han,S . J . Lee,T . H . Kang,K . S . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.3
In order to calculate the theoretical daily nutrient requirements for broiler breeder hens in relation to the weeks of age, estimates were made of daily needs for metabolizable energy, protein and amino acids using various prediction equations previously suggested by other researchers and compared each other and with the results of feeding trials. These were based on the average performance of hens on the production model calculated from the results of current studies by the author.
육성기 사료의 양적 제한급여가 육용종계의 발육 및 산란성에 미치는 영향
이규호,김덕교 ( K . H . Lee,D . K . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.4
The effect of feed restriction during the rearing period on sexual maturity, performance in the laying house and economy was studied using 305 birds of broiler breeder pullet. During the rearing period(7∼24 weeks of age) feed was offered 80%, 75%, 70%, and 65% of feed consumption of full fed group. From 25 weeks of age all groups were fed ad libitum The results obtained are summarized as follows: 1. Body weight of 65% restricted group at 24 weeks of age was 73% of that of ad libitum group. At 45 weeks of age it was 85% of that of full fed group and not yet recovered completely. 2. Feed consumption of restricted groups from 25 to 50 weeks of age was somewhat more that of control group. However, there was no significant difference. 3. The degree of sexual maturity examined by weight of reproductive organ, length of fallopian tube and weight of comb and wattle at 21 weeks of age was extremely delayed with groups of feed restriction. The skeleton, however, almost equally developed between ad libitum and restricted groups. 4. The first egg production (days to 50% egg production) was delayed 1∼2 weeks with the restricted feeding. 5. Hen-day egg production was improved as the degree of restriction became intensive and 65% restricted group had the best result. The production of egg over 53g(hatchable egg) showed the same tendency. 6. Egg size was not affected by treatment. 7. Feed cost required for lkg egg production was the highest with the ad libitunz group and was decreased as the degree of feed restriction increased. The same tendency was obtained for the feed cost for 1 hatchable egg (over53g) Summarizing all of the da-ta, it was suggested that in broiler breeder the feed restriction should be below 65% of ad libitum group during the rearing period(7∼24 weeks of age), and the body weight at 24 weeks of age should be kept at the level of less than 70% of the control in order to get better performance during the laying period.
이규호,김인철,Lee Kew-Ho,Kim In-Chul The Membrane Society of Korea 2005 멤브레인 Vol.15 No.1
Poly(vinyl alcohol) (PVA)이 폴리술폰 한외여과 막, 술폰화된 폴리에테르술폰, 폴리아미드 나노 막 위에 코팅된 나노 복합막을 가압법에 의해서 제조되었다. PVA는 글루터알데하이드 수용액으로 가교되었다. 모든 지지층위에 PVA 희박용액이 성공적으로 코팅되어 나노복합막이 제조되었다. 지지막 위의 친수화도가 높아짐에 따라 수투과 유량이 증가하였다. 특히 음하전을 띠는 폴리아미드 나노 복합막의 제타전위는 PVA로 코팅함으로서 감소되었다. 막 오염 실험은 양이온을 띠는 계면활성제, 휴민산, 휴민산과 칼슘이온 복합체 및 bovine serum albumin을 사용하여 실행하였다. PVA로 코팅되지 않은 폴리아미드 나노복합막은 각각의 오염물질에 의해서 심하게 오염되었다. 휴민산과 단백질에 의한 오염은 오염물질의 등전점에서 가장 심하게 발생하였다. 휴민산에 이가 양이온을 첨가함으로서 오염이 심각하게 일어났다. PVA 수용액으로 폴리아미드 나노 복합막을 코팅함으로서 막 오염이 감소되었다. PVA로 코팅된 폴리아미드 나노 복합막은 산, 염기용액에 대해 저항성을 보였다. The poly(vinyl alcohol) (PVA)-based thin film composite nanofiltration (NF) membranes were prepared by coating polysulfone ultrafiltration membranes, sulfonated polyethersulfone and polyamide NF membranes with aqueous PVA solution by a pressurizing method. The PVA was cross-linked with aqueous glutaraldehyde solution. The NF membranes coated with a very low concentration of PVA on all the support membranes was successfully prepared. With increasing the hydrophilicity of the support membranes, the water flux increased. Especially, ζ-potential of negatively charged polyamide NF membrane was reduced by coating the membrane with PVA. A fouling experiment was carried out with positively charged surfactant, humic acid, complex of humic acid and calcium ion and bovine serum albumin. A non-coated polyamide NF membrane was significantly fouled by various foulants. The fouling process when using humic acid and protein occurred at the isoelectric point. There was severe fouling when using humic acid and adding bivalent cations. By coating the polyamide NF membrane with aqueous PVA solution, fouling was reduced. The polyamide NF membrane coated with PVA was resistant to the acidic and basic solution.
Performance of Annealed Polyacrylonitrile Nanofiltration Membrane
이규호,김인철,Lee Kew-Ho,Kim In-Chul The Membrane Society of Korea 2005 멤브레인 Vol.15 No.1
통합형 비대칭 폴리아크릴로니트릴(PAN) 한외여과막의 기공크기를 줄이기 위하여 아닐링을 하였다. 두 종류 PAN 고분자(단일중합체와 공중합체)의 화학적 구조가 아닐링에 미치는 영향을 조사하였다. PAN 고분자의 아닐링은 고분자의 화학적 구조에 큰 영향을 받는다. 공중합체가 단일중합체에 비해서 덜 강직한 구조를 지니므로 아닐링에 훨씬 큰 영향을 받는다. 아닐링을 실시하기 전에 고분자 내에 잔존하는 용매의 완벽한 제거를 위하여 분리막을 물 속에서 예열 처리하였다. 예열처리를 하지 않은 경우가 아닐링 효과가 더 컸다. 높은 온도에서 아닐링 하기 전에 예열을 하면 기공크기의 증가를 가져 왔다. 막의 표면은 약간 음전하를 띠었고 PAN 나노막의 염배제율은 다음과 같은 순서로 측정되었다: R(Na₂SO₄) > R(NaCl) > R(MgSO₄) > R(CaCl₂). Donnan 평형과 전기중성도에 의해서 염제거 거동을 설명하였다. The integrally skinned asymmetric PAN ultrafiltration membranes were annealed for reducing the pore size. The effect of the chemical structure of two PAN polymers (homo- and copolymer) on annealing was investigated. The annealing of PAN polymer was strongly affected by the chemical structure of the polymer. In other words, the annealing effect of the copolymer was much larger than that of the homopolymer due to its less rigid structure of the main chain. Before annealing, the membranes were usually preheated in water in terms of the complete removal of remained solvents in the membranes. The annealing effect was bigger when no preheating. However, the preheating of the membrane before annealing at high temperatures leads to an increase in the pore size of membranes. The surface of the membranes was slightly negative and the salt rejection of PAN nanofiltration membrane was in the following order: R(Na₂SO₄) > R(NaCl) > R(MgSO₄) > R(CaCl₂). This salt rejection behavior could be explained by the Donnan equilibrium and the electroneutrality.