Lactobacillus spp. 와 Bifidobacterium spp. 의 Pulsed Field Gel Electrophoresis 에 의한 Genomic DNA 의 특성

윤영호,백영진,이재후 ( Y . H . Yoon,Y . J . Baek,J . H . Lee ) 한국축산학회 1998 한국축산학회지 Vol.40 No.1

Characteristics of genomic DNA of Lactobacillus spp. and Bifidobacterium spp. were determined by pulsed field gel electrophoresis and the following results were obtained; Four enzymes, Sma I, Apa I Not I and Sfi I were identified as suitable for generation of relatively few numbers of distinct fragments from the Lactobacillus spp. genomes, whereas five enzymes, Sma I, Apa I, Sfi I and Dra I were suitable for Bifidobacterium spp. genomes. The genome sizes of Lactobacillus spp. ranged from 1.S8Mb to 3.31Mb, the genome sizes of L. brevis ATCC 8287, L. fermentum ATCC 14931, L. casei YIT 9018, L. plantarum KCTC 1048 and L. delbruekii subsp. delbruekii ATCC 9469 were estimated to be 1.93Mb, 1.98Mb, 2.84Mb, 2.81M6 and 1.82Mb, respectively. Those of Bifidobcxterium spp. ranged from 1.85Mb to 2.83Mb. The genome sizes of B. bifrdum ATCC 29521, B. longum ATCC 15707, B. infantis ATCC 15697 and B. bifidum CU 1370 were estimated to be approximately 1.85Mb, 2.83Mb, 1.86Mb and 1.94Mb, respectively.

Lactobacillus casei YIT9018 의 생존경쟁기작에 관한 연구

윤영호,윤계병,김현욱 ( Young Ho Yoon,Que Byung Yoon,Hyun Uk Kim ) 한국축산학회 1981 한국축산학회지 Vol.23 No.3

The competitive survival mechanism of Lactobacillus casei YIT9018 has been studied using Escherichia coli LDTMI in MRS and TGY media. The results obtained are summarized as follows; 1. When two oragisms were cultured together, the growth of E. coli was inhibited greatly by L. casei in MRS medium, but in TGY medium, E. coli was inhibited only slightly. 2. The growth inhibition of E. coli by L. casei was studied at the controlled pHs (pH 7, 6, 5, and 4) of MRS broth. The growth inhibition of E. coli was not distinct at pH 7 and 6, but at pH 5 and 4, E. coli was inhibited distinctively. This result means L. casei produced E. coli-inhibiting substances during its growth below pH 6.0 in MRS broth. 3. The growth inhibition of E. coli by L. casei was analyzed by cylinder plate method. MRS broth adjusted to pH 5 exhibited the inhibition zone of 4.2 ㎜ diameter against E. coli while L. casei cultured MRS broth exhibited the inhibition zone of 10 ㎜ diameter at the same pH. Inhibition zone exhibited by L. casei cultured MRS broth was the largest one among the three cultured media. 1t is apparent that production of E. coli-inhibiting substances (LC factor) by L. casei in addition to the acid production. 4. Sodium acetate in MRS medium was found to play the important role in the synthesis of LC factor by L. casei The role of sodium acetate was also evidenced in TGY medium by exhibiting the increased inhibitory activity when TGY medium was supplemented with sodium acetate and 0.2 % glucose. 5. L. casei YIT9018 was found to compete and multiply in the natural habitat by producing acid as well as LC factor.

한우췌질(韓牛膵蛭)에 대(對)한 사종약물(四種藥物)이 시험관내(試驗管內)에서의 살충효력(殺蟲效力) 및 배란억제효력(排卵抑制效力)에 관(關)한 실험(實驗)

윤영호,이창업,Yoon, Y.H.,Lee, C.E. 대한수의학회 1968 大韓獸醫學會誌 Vol.8 No.2

Four drugs, bithionol, hexachlorophee, hexachloroethane and tetrachloroethylene, were tested on the in vitro effects of vermicidal and laying capacity inhibitory action to the Eurytrema Pancreaticum of Korean cattle, and the results obtained were as follows : 1) Of the four drugs, bithionol was most effective at both high and low concentrations. 2) The effects of hexachlorophene, hexachloroethane and tetrachloroethylene were less effective than that of bithionol, and the laying activity, at low concentration, was observed to increase at the early stage and decrease gradually thereafter. 3) Tetrachloroethylene was least effective of the four drugs.

광대역 이동통신 환경에서 초 분해능 방향 탐지 알고리즘의 성능 비구 분석

윤영호,박윤옥,박형래,Yun Young-Ho,Park Yoon-Ok,Park Hyung-Rae 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.8A

본 논문에서는 광대역 이동통신 환경에서 대표적인 초 분해능 방향 탐지 알고리즘들의 도래각 추정 성능을 비교, 분석한다. 먼저, 이동통신 환경에서 발생하는 angular spread 현상을 고찰하고 광대역 OFDMA 신호의 벡터채널 모델을 유도한다. 또한, OFDMA 스마트 안테나 시스템을 위한 방향 탐지 시스템의 구조를 제시하고 광대역이동통신 환경에서 WiBro 시스템을 목표 시스템(target system)으로 설정하여 초 분해능 방향 탐지 알고리즘의 도래각 추정 성능을 시뮬레이션을 통해 비교, 분석한다. In this paper, the performances of representative high resolution direction finding algorithms are evaluated and compared in wideband mobile environments. The angular spread phenomenon in mobile environments is first investigated and then a vector channel model for wideband OFDMA signals is derived. A direction finding system architecture for OFDMA smart antenna systems is proposed and finally the performances of high resolution direction finding algorithms are evaluated in wideband mobile environments by taking the WiBro system as a target system.

Yoghurt 와 Kefir 에서 분리된 Lactobacillus spp. 및 비 스타터 균주의 Cholesterol 흡수 활성

윤영호,강동규,백영진,허철성 ( Y . H . Yoon,D . G . Kang,Y . J . Baek,C . S . Huh ) 한국낙농학회 1998 韓國酪農學會誌 Vol.20 No.2

Bacillus amyloliquefaciens alpha - amylase 유전자의 Lactobacillus casei YIT 9018 - PC 에 크로닝과 발현

윤영호,백영진 ( Young Ho Yoon,Young Jin Baek ) 한국낙농학회 1993 韓國酪農學會誌 Vol.15 No.1

OFDMA 스마트 안테나 시스템을 위한 도래각 추정 기반의 적응 빔 형성 알고리즘

윤영호,박윤옥,박형래,Yun, Young-Ho,Park, Yoon-Ok,Park, Hyung-Rae 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.12A

본 논문에서는 orthogonal frequency-division multiple-access 스마트 안테나 시스템을 위한 효율적인 도래각 추정 기반의 적응 빔 형성 알고리즘을 제안한다. 제안된 알고리즘은 추정된 도래각 정보를 이용하여 원하는 신호의 방향으로 주 빔 (main beam)을 형성하는 반면, 간섭 신호의 방향에는 null을 형성함으로써 간섭 신호를 효율적으로 제거한다. 또한, 다중 경로 신호에 대한 빔 형성 출력들을 효율적으로 결합함으로써 공간 다이버시티 이득을 얻을 수 있다. 제안된 알고리즘의 효율성을 입증하기 위해 셀룰러 이동통신 환경에서 WiBro 시스템을 목표 시스템 (target system)으로 설정하여 알고리즘의 성능을 분석하고 least-sqaures 빔 형성 알고리즘과 성능을 비교한다. In this paper, an efficient direction-r)f-arrival based adaptive beamforming algorithm for orthogonal frequency-division multiple-access smart antenna systems is proposed. The proposed algorithm provides a high performance by steering main beams to the directions of a desired signal, whereas steering nulls to the directions of the interference, using the estimated directions. The beamforming outputs obtained by steering the main beams to the distinct directions of resolvable multipath signals are combined in a maximal ratio manner to exploit angular diversity gain. The performance elf the proposed algorithm is finally evaluated in cellular mobile environments to verify its efficiency and is compared with that of least-squares beamforming algorithm, by taking the WiBro system as a target system.

구조용 용접철망의 규격제정에 관한 연구

윤영호(Young Ho Yoon),양영성(Young Sung Yang) 한국강구조학회 1994 韓國鋼構造學會誌 Vol.6 No.3

The method using structural welded wire-fabric having been introduced as a plan that simplify the stage of processing and assembling reinforcing rods and increase the efficiency of them in reinforced concrete construction. The purpose of this study, by investigating, contrasting specification of each nation, is to suggest a fundamental data fit for structural purpose and required to establish standard specification for structural welded wire fabric. 1) As a result of analyzing a present industrial standards, because wire-fabric is confirmed for the use of crack controlling, the standard for structural purpose having been required. 2) Elongation is used as a method of measuring ductility in Europe, ISO, whereas reduction of area is used in Korea, Japan, U.S.A. Accordingly, it is necessary to change the method into elongation and elongation percent is established with gage length of 5d_b, elongation of 12%. 3) We will contain satisfying bond and anchorage in case that probability of 95%, inspection method of ISO, is adopted. 4) The device of DIN 488 and BS 4483, which is used for carrying out the shear test, shall be recommended, and testing jig of KS shall be improved.

해양조건을 고려한 방류수의 근역 혼합특성 모의

윤영호 ( Young-ho Yoon ),이호진 ( Ho-jin Lee ) 한국환경기술학회 2004 한국환경기술학회지 Vol.5 No.3

해양방류수의 근역혼합특성을 예측하는 것은 하수가 혼합되는 동수역학적 과정의 복잡성과 해양 조건의 변동 때문에 매우 어렵다. 이와 같은 복잡한 조건을 모델링하기 위한 일반적인 방법은 평균, 최적 또는 최악의 대표적인 상태로 모의를 수행하는 것이다. 해류의 크기, 방향, 밀도가 조석과 유효방류량에 따라 매일변화하기 때문에 일반적인 방법으로는 하수장의 거동 특성을 정확히 예측할 수는 없다. 이 연구에서는 속초하수종말처리장에서 방류되는 해양방류하수의 근역혼합특성을 NRFIELD 모형을 이용하여 분석하였다. 방류지점에서 관측된 해류와 조위 및 2000년 11월25일에서 2001년 1월 20일까지 57일 동안 속초하수종말처리장에서 모니터링된 유효방류량과 방류수온을 입력자료로 사용 하였다. 그 결과, 조위와 방류수와 주변수의 밀도차에 의한 부력효과가 근역혼합거동에 미치는 영향이 조사되었다. It is very difficult to predict near field mixing characteristics of ocean outfall plums, however, because of the complexity of the hydrodynamic process that mix the wastewater and also because of the variability in oceanic conditions. The usual approach to modeling these conditions is to perform simulations for a few representative conditions, e.g. mean, best and worst case conditions. The current speed, current direction, and density change with tide and the effluent flowrate diurnally, however, so these methods cannot correctly predict characteristics of wastefield behavior. In this study, the near field mixing characteristics of Sokcho ocean outfall plume discharged from Sokcho M.W.T.P.(municipal wastewater treatment plant) was investigated using NRFIELD model(Robers, 1999). Ocean currents and tidal elevation were measured near the discharging area, and effluent flowrate and temperature were monitored at Sokcho M.W.T.P. for 57 days between November 25, 2000 and January 20, 2001 are used input data. In result, the effects of tidal elevation and buoyancy on near field mixing is investigated.

구조용 용접철강의 역학적 특성에 관한 실험적 연구

윤영호(Young Ho Yoon),양영성(Young Sung Yang) 한국강구조학회 1994 韓國鋼構造學會誌 Vol.6 No.3

The test is carried out in order to make clear the mechanical properties of the structural welded wire fabric with variables such as tensile strength, reduction of area, elongation, melding point shear strength and bendability. The results are as follows : 1) The test piece across the welds about tensile strength is slightly higher than between the welds, and the elongation is opposite. 2) Welding point shear strength is considerably high, but if the strength is much increased, tensile strength get low by brittleness of welding point. Accordingly it is necessary to establish the shear strength as 15 kgf/㎟(150N/㎟). 3) The bend test should be carried out at welding point, the ductility of which is the smallest.