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김태종(Kim, T.J.),구자함(Koo, J.H.),이시복(Lee, S.B.),김문생(Kim, M.S.) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.3
The spindle with a built-in motor can be used to simplify the structure of machine tool system, while the rotor has unbalance mass inevitably. Therefore, it is important to recognize the effect of unbalance mass. This paper presents analysis of dynamic behavior of a high speed spindle with a built-in motor. The spindle is supported by the angular contact ball bearings and the rotor is fixed at the middle of spindle. The spindle used in CNC automatic lathe has been investigated using combined methodologies of finite elements and transfer matrices. The Houbolt method is used for the integration of the system equations and the dynamic behavior of spindle is obtained considering unbalance mass of rotor. Results show that increasing rotational speed of spindle magnifies the whirl responses of spindle seriously. Also the whirl responses of spindle are affected by the other factors such as unbalance mass and bearing stiffness.
급성 유방염에 걸린 젖소의 유즙에서 분리한 Serratia marcescens의 생화학적 성상 및 약제 감수성
김태종(T. J. Kim),김봉환(B. H. Kim) 한국예방수의학회 1979 예방수의학회지 Vol.3 No.1
Mastitis due to Serratia marcescens was observed in an intensive dairy cattle breeding station in the Republic of Korea during the summer of 1978. A study was made of 13 strains of Serratia marcescens isolated from mastitis milk; all the isolates produced prodigiocin on various culture media. An extensive study of the biochemical properties revealed a degree of uniformity that can be expected with this group of bacteria. Serratia species were highly resistant to ampicillin, erythromycin, lincomycin, novobiocin, penicillin and tetracycline whereas all the cultures were sensitive to carbenicillin, chloramphenicol, gentamicin and kanamycin. Various proportions of the strains were sensitive to other antibiotics including colistin, neomycin and streptomycin.
J. H. Baek(백종현),N. A. B. Razali(누룰 아키라 빈티 라자리),M. S. Joun(전만수),T. J. Kim(김태종),S. J. Kim(김수진) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
The accuracy of Linear Motion bearing (LM Bearing) of a machine tool is very important to evaluate the performance of the machine. Laser interferometer measurement system is one of the most reliable equipment to measure the angular error. This system is widely used to measure the position and angular errors by using an optical separator and reflector. Recently, the importance of remanufacturing for circular economy for carbon-neutral has been increasing. In machine tools, it is necessary to determine whether old parts can be reuse by measuring the precision of LM bearing for remanufacturing. Angular error of the LM bearing was caused by the straightness error of the rail. In this paper, the angular error of used LM bearing was compared to the new one to determine if it’s either residual or vice versa. Using Renshaw’s laser interferometer, we measured the pitch and yaw angle of the THK’s new LM bearing and the old LM roller bearing belongs to old planner miller that was disassembled for remanufacturing. By providing the result of both comparisons, we intended to help the machine tool industry in implementing circular economy.
T.S. KIM(金太聖),T.J. KIM(金泰鍾),W.C. LEE(李元暢) 한국예방수의학회 1991 예방수의학회지 Vol.15 No.1
Bacteriological and physice-chemical status of spoiled beef in a cold storage was investigated. The results obtained are summarized as follow: 1. When the beef during a cold strage was spoiled, total bacterial count, pH and volitile basic nitrogen(VBN) were 10⁷/g, 6.2 and 18.87㎎%, respectively. 2. In order to investigate the bacteria which caused the spoilage of beef, bacteria were isolated and identified, Most of them found to be pseudomonas aeruginosa. 3. salmonella spp. were not isolated from packaged but isolated unpackaged fresh beef purchased from a meat shop. 4. The spoilage of beef depended upon the degree of contamination before storage and storage temperature.
l.C. KIM(金益千),T J. KIM(金泰鍾) 한국예방수의학회 1991 예방수의학회지 Vol.15 No.1
Groups of pigs were injected intramuscularly once daily for two days with therapeutic dose of penicillin (3㎎/㎏ Body weight), ampicillin(10㎎/㎏ B.W.) or chloramphenicol (5.5㎎/㎏ B.W.) and killed by stunning 24 hour after the second injection, Samples of gluteus muscle(opposite injection site), kidney, serum and urine were collected when slaughtered and determinded antibiotic residues by microbiological assay. The results were as follows; 1. All samples of muscle, kidney and serum in pigs injected with penicillin, ampicillin or chloramphenicol were found in positive reaction by microbiological assay plate technique. 2. In all pigs injected with penicillin, the antibiotic was present at levels of >0.04㎍/g tissues. 3. In the pigs injected with ampicillin, >0.04㎍/g tissues was found in 3/4 sites; but 5 urine samples were all negative. 4. muscle, kidney and serum have little commercial value samples of them are most suitable for antibiotic assays.
더러브렛 경주마의 경주시간에 대한 성 - 연령별 보정계수
이광전(K . J . Lee),박경도(K . D . Park),강민식(M . S . Kang),최우섭(W . S . Choi),김태종(T . J . Kim) 한국축산학회 1995 한국축산학회지 Vol.37 No.1
After analyzing a total of 53,097 racing records for 2,928 horses from Korea Racing Horse Association, the results obtained were as follows. 1. Sex-age effect was subdivided into 72 groups, and horse effect was regarded as random(σ²e/σ²h = 1.94). 2. Fifty, four to 56 month-old groups took the largest portion of the total records. Racing performance for geldings, stallions, and mares reached their peaks at 4.5, 4.3, and 3.5 years old, respectively. Comparing with the foreign peak years of 5-6 for racing hones, those in domestic horses were much younger. Due to poor management and frequent races, racing lives of horses were shortened and might result in economic losses. 3. Because geldings are included in the classification of male by KRHA, it is likely that the racing performance for geldings might be underestimated, while stallions may overestimated. 4. Variances for both additive and multiplicative adjustments were the same at 2.68. Correlations between means and standard deviations for racing time by age groups were -0.06, and this low correlation led to the suggestion that additive adjustment factors for racing time were much easier and more desirable.
축산폐수가 하천오염에 미치는 영향에 관한 연구 (하) -세균학적 조사를 중심으로-
유재근,이희수,이원창,김태종,이택주,Ryu J. K.,Lee H. S.,Lee W. C.,Kim T. J.,Lee T. J. 대한수의사회 1986 대한수의사회지 Vol.22 No.4
To evaluate effects of livestock wastewater on stream pollution, the survey on the environmental sanitation, hydrology, water quality, Pollutant loads and bacterial indicators in a stream receiving livestock wastewater discharged from Chun Sung livestock