http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
구양모 嶺南大學校 工業技術硏究所 1982 연구보고 Vol.10 No.1
During sintering of Al-4w/oCu powder compact with 20% porosity at 600℃, a liquid eutectic alloy (Al-33.2w/oCu) of copper and aluminum formed, penetrated between alumimum particles, and was dispersed aluminum flakes on the skin of aluminum particles. And then copper atoms of eutectic alloy diffused aluminum to from solid solution of aluminum and formed dispersed CuAl₂O ₄to react to diffused oxygen atoms from aluminum flakes. This dispersed CuAl₂O ₄strengthened bonding of aluminum particles.
니켈함량과 소결시간이 알루미늄 소결체의 압환강 도외 인장강도에 미치는 영향
具良謨 嶺南大學校 工業技術硏究所 1981 연구보고 Vol.9 No.2
The effects of Ni content and sintering time on tensile strength, elongation and radial crushing strength of Al-4Cu-xNi compacts were investigated. As nickel content of Al-4Cu-xNi compacts sintered at 600℃ and for 30 minites increased, the tensile strength, elongation and radial crushing strength of these compacts increased. It was believed that sintering was activated to form AlN₃i ₂with exothermic reaction which seemed to quicken the formation of CuAl₂O ₄spinel from submicron size of Al₂O ₃on flakes the skin of aluminum particles. This CuAl₂O ₄formation seemed to strengthen the bonding between aluminum particles. Optinal sitering condition was sintered at 600℃ and for 30 minites and nickel content was 2%.
유전 및 육종 : 한우 도체형질의 유전능력평가를 위한 통계모형 탐색
구양모 ( Yang Mo Koo ),김시동 ( Si Dong Kim ),김정일 ( Jung Il Kim ),송치은 ( Chi Eun Song ),이기환 ( Ki Hwam Lee ),정용호 ( Yeoung Ho Jeoung ),이재윤 ( Jae Youn Lee ),장현기 ( Hyun Gi Jang ),박병호 ( Byoung Ho Park ),최태정 ( Te 한국동물자원과학회(구 한국축산학회) 2011 한국축산학회지 Vol.53 No.4
2006년부터 2009년까지 축산물품질평가원에서 등급 판정된 도체성적이 있는 개체와 한국종축개량협회에 등록이 확인된 231,382두의 자료를 이용하여 각 도체형질의 자료구조 분석 등을 살펴보고, 각 요인별로 도체형질에 어떠한 영향을 주는 지에 대한 환경효과 등을 분석하고, 변수선택법 등을 이용하여 향후 유전능력평가에서 사용 가능한 통계모형 찾아내고자 실시하였다. 한우 암, 수, 거세를 포함한 전체집단에서 출하체중, 도체율, 등지방두께, 근내지방도에서 정규분포를 보이고 있었고, 다른 형질은 정규분포에 근접함을 확인할 수 있었다. 각 요인에 대한 분산분석에서는 한우 도체형질에 대하여 성별, 출생년도-계절, 도축년도-계절, 출생지역, 도축일령의 모두 고도의 유의성(p<0.01)이 인정되었다. 변수선택법을 이용한 모형적합도 검정에서는 출하체중, 도체중, 도체율, 배최장근단면적은 다섯 가지 환경효과를 선택하는 것이 최적이었고, 등지방두께와 근내지방도는 네 가지 환경효과를 고려하는 것이 최적이었지만, 다형질 분석으로 한 번에 분석을 하기 위해서는 다섯 가지 환경효과를 함께 고려하는 것이 적합하다고 사료된다. This study was conducted to study the environment effects on live weight, carcass weight, dressing percentage, eye muscle area, backfat thickness, and marbling score, which are the carcass traits of Hanwoo, based on the estimates and all the possible regression for the selection of variable and significance test for 231,382 heads that underwent the carcass measurements. The average and standard deviation for the live weight, carcass weight, dressing percentage, eye muscle area, backfat thickness, and marbling score were 654.79±91.61kg, 362.30±67.15kg, 59.52±0.03%, 81.79±12.21cm², 11.39±5.40mm, 4.38±2.29, respectively. The live weight, carcass weight, dressing percentage, eye muscle area, backfat thickness, and marbling score for cow were 532.79±78.38kg, 313.40±44.90kg, 56.50±0.03%, 75.24±10.69cm², 11.82±5.10mm, 4.30±2.06, respectively, while for bull were 619.74±93.27kg, 376.89±48.62kg, 58.61±0.02%, 85.61±10.46cm², 5.64±2.71mm, 1.41±0.83, respectively, and for steer were 681.78±70.72kg, 415.23±49.43kg, 60.19±0.02%, 88.29±10.27cm², 12.71±5.23mm, 5.42±1.99, respectively. In the environmental variables selection based on the variables selection method, the examination by carcass traits suggested that the most appropriate model could be determined when five variables were selected for the live weight, carcass weight, dressing percentage, eye muscle area, and four variables for backfat thickness, and marbling score. When they were considered at a time altogether based on multiple traits, it was deemed to be desirable to insert all five variables into the variables for analysis. In addition, high significance was found by carcass traits.
유전 및 육종 : 단형질 개체모형을 이용한 한우 육종가 추정프로그램 개발
구양모 ( Yang Mo Koo ),김정일 ( Jung Il Kim ),송치은 ( Chi Eun Song ),이기환 ( Ki Hwan Lee ),신재영 ( Jae Young Shin ),장현기 ( Hyun Gi Jang ),최태정 ( Tae Jeong Choi ),김시동 ( Di Dong Kim ),박병호 ( Byoung Ho Park ),조광현 ( Kwa 한국동물자원과학회(구 한국축산학회) 2013 한국축산학회지 Vol.55 No.5
Estimate breeding value can be used as single trait animal model was developed directly using the Fortran language program. The program is based on data computed by using the indirect method repeatedly. The program develops a common algorithm and imprves efficiency. Algorithm efficiency was compared between the two programs. Estimated using the solution is easy to farm and brand the service, pedigree data base was associated with the development of an improved system. The existing program that uses the single trait animal model and the comparative analysis of efficiency is weak because the estimation of the solution and the conventional algorithm programmed through regular formulation involve many repetition; therefore, the newly developed algorithm was conducted to improve speed by reducing the repetition. Single trait animal model was used to analyze Gauss-Seidel iteration method, and the aforesaid two algorithms were compared thorough the mixed model equation which is used the most commonly in estimating the current breeding value by applying the procedures such as the preparation of information necessary for modelling, removal of duplicative data, verifying the parent information of based population in the pedigree data, and assigning sequential numbers, etc. The existing conventional algorithm is the method for reading and recording the data by utilizing the successive repetitive sentences, while new algorithm is the method for directly generating the left hand side for estimation based on effect. Two programs were developed to ensure the accurate evaluation. BLUPF90 and MTDFREML were compared using the estimated solution. In relation to the pearson and spearman correlation, the estimated breeding value correlation coefficients were highest among all traits over 99.5%. Depending on the breeding value of the high correlation in Model Ⅰ and Model Ⅱ, accurate evaluation can be found. The number of iteration to convergence was 2,568 in Model Ⅰ and 1,038 in Model Ⅱ. The speed of solving was 256.008 seconds in Model Ⅰ and 235.729 seconds in Model Ⅱ. Model Ⅱ had a speed of approximately 10% more than Model Ⅰ. Therefore, it is considered to be much more effective to analyze large data through the improved algorithm than the existing method. If the corresponding program is systemized and utilized for the consulting of farm and industrial services, it would make contribution to the early selection of individual, shorten the generation, and cultivation of superior groups, and help develop the Hanwoo industry further through the improvement of breeding value based enhancement, ultimately paving the way for the country to evolve into an advanced livestock country.
구홍모 ( Hong Mo Koo ),구인모 ( In Mo Ku ),고영채 ( Young Chae Ko ),이희 ( Hei Lee ),양기원 ( Gi Won Yang ),이영일 ( Young Il Lee ),조태일 ( Tae Il Cho ),강유미 ( You Mee Kang ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.9
To our knowledge, implantation into the uterine muscle wall is one of the rare form of ectopic pregnancy, with only 16 cases reported until 1995. The early diagnosis depends upon the sonographic finding of intramural gestational sac-like growth and persis
고에너지 전자빔투사방법을 사용한 TiB2/Ti 표면합금화 재료의 제조 연구
구양모,이성학,어광준,김낙준,오준철 대한금속재료학회(대한금속학회) 1998 대한금속·재료학회지 Vol.36 No.12
The present study is concerned with the fabrication and the microstructural analysis of a TiB₂/Ti surfacealloyed material fabricated by high-energy electron beam irradiation. The mixture of TiB₂ powders and flux was deposited on a Ti-10V-2Fe-3Al alloy substrate, and then electron beam was irradiated on these mixture using an electron beam accelerator. The melted region of about 1.5 ㎜ thickness was homogeneously formed without pores or cracks, and was composed of primary and eutectic TiB borides in the β phase matrix. The formation of these TiB borides greatly improved hardness, especially high-temperature hardness up to 450℃. These findings suggested that the surface-alloying method using high-energy electron beam irradiation was economical and useful to the development of new advanced materials with improved high-temperature properties.
Separation of Amino Acids by Simulated Moving Bed Using Competitive Langmuir Isotherm
Yang, Yun-Jeong,Lee, Chong-Ho,Koo, Yoon-Mo The Korean Society for Biotechnology and Bioengine 2004 Biotechnology and Bioprocess Engineering Vol.9 No.5
The Separation of two amino acids, phenylalanine and tryptophan, was carried out using laboratory simulated moving bed (SMB) chromatography. The SMB process consisted of four zones, with each zone having 2 columns. The triangle theory was used to obtain the operating conditions for the SMB. The mass transfer coefficients of the two amino acids were obtained from the best-fit values by comparing simulated and experimental pulse data. The competitive adsorption isotherms of the two amino acids were obtained by single and binary frontal analyses, taking into consideration the competition between the two components. A competitive Langmuir isotherm, obtained from single-component frontal chromatography, was used in the first run, and the isotherm from binary frontal chromatography in the second, with the flow rate of zone 1 modified to improve the purity. Compared to the first and second runs, the competitive Langmuir isotherm from the binary frontal chromatography Showed good agreement with the experimental results. Also, adjusting the flow rate in zone 1 increased the purity of the products. The purities of the phenylalanine in the raffinate and the tryptophan in the extract were 99.84 and $99.99\%$, respectively.
고에너지 전자빔으로 투사된 연주철 압연롤재료의 미세조직 개선 연구
구양모,이성학,이희춘,서동우 대한금속재료학회(대한금속학회) 1996 대한금속·재료학회지 Vol.34 No.2
The present study is concerned with microstructural analyses of the surface layer of a ductile cast iron (DCI) roll modified by irradiation of high-energy electron beam. DCI roll specimens were irradiated using an electron accelerator, and the microstructures of the irradiated surface layers were examined. As a result of irradiation, the matrix phase was changed from banite to a mixture of retained austenite and martensite, and coarse spheroidal graphites were dissolved partially under the higher heat input. The microstructural modification by the irradiation improved greatly the hardness of surface layer because of the martensitic matrix, although retained austenite was presented around the spheroidal graphite. In order to investigate the transformation mechanism, the simulation test including thermal cycles of abrupt heating and quenching was carried out. Thermal analysis of the irradiated surface layer was also carried out for understanding of microstructural modification in terms of the irradiation parameters.