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지영진,정환종,김병관 한국인터넷방송통신학회 2023 International journal of advanced smart convergenc Vol.12 No.4
The purpose of this study was to investigate the muscle activity of the lower extremity during driver swing in three-foot positions (Feet Open Stance, Feet Straight Stance, Lead Foot Open Stance). The electromyograms of gastrocnemius, tibialis anterior, and vastus lateralis during swing were measured and analyzed in three sections (take away - back swing, back swing - down swing, and down swing - follow swing). There was no significant difference in muscle activity according to foot position. Muscle activity according to phase was significantly higher in right gastrocnemius and tibialis anterior, and the left and right vastus lateralis in down swing - follow swing. In conclusion, the difference in muscle activity according to foot position is insignificant, and it is considered that the muscle activity to maintain the balance of the body increases toward the end of swing.
환자로부터 분리한 Klebsiella pneumonia의 항생제 내성에 관한 연구
池寧鎭,白亨基,洪性魯,曺道鉉 동남보건대학 2000 論文集-東南保健大學 Vol.18 No.2
One hundred strains of Klebsiella pneumoniae were isolated from feces of dysentenc patients who were resistant to ampicillin but sensitive to nalidixic acid. Sixteen out of the 100 isolates were resistant to chloramphenicol and cephalothin, 16 to tetracycline, 13 to streptomycin, 8 to kanamycin and 2 to gentamycin. The distribution of resistance to different combination of eight antimicrobioal agents was as follows. 68% were resistant to 2 antibiotics, 15% to the combination of three antibiotics, 12% to the mixture of 4 chemicals, 6% to 5 mixture, 3% to 6 antibiotics and 2% to the combination of 7 antibiotics. Electorphoresis patterns of the plasmid DNA of K. pneumoniae were investigated. 98KP8. 98KP9 and 98KP10 had a plasmid of 45.8Md, 44.1Md and 47.8Md, respectively. 98KP1 had four plasmids where their molecular weight larged from 29.2Md to 81.2Md 98KP2 also had four plasmids and the molecular weight ranged from 4.9Md to 94.1Md The EcoR I restriction fragments of the K. pneumoniae R plasmid DNA were sperated by elctrophoresis The EcoR I restriction fragment analysis showed that there is no correlation between the number of plasmid and the diversity of the fragment Moreover we could not observe the similarity of the fragment among the strains which have the same resistance against the same combination of antibiotics.
Effect of Ni-YSZ core-shell on the electrochemical properties of SOFC anode
강영진,홍선기,이민진,안용태,지미정,최병현 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
SOFC의 대표적인 연료극인 Ni-YSZ 복합체는 높은 전기전도도와 화학적 안정성, 우수한 연료촉매특성 등의 장점을 가지고 있다. 그러나 SOFC의 장기간 작동 시 Ni-YSZ 연료극의 Nickel 입자가 조대화됨에 따라 삼상계면(TPB, triple phase boundary)이 감소하여 성능이 낮아지고 또한 수소가 아닌 탄화수소계 연료 사용시 탄소침적에 취약하여 성능 열화가 나타나는 단점을 지니고 있다. 본 연구에서는 각각 mechanofusion 공정으로 혼합하여 제조한 core-shell Ni-YSZ 분말과 일반적인 ball mill 공정으로 혼합한 분말을 SOFC 단전지 제조에 사용하여 균일하게 혼합된 연료극의 미세구조가 Ni 장시간 작동 시의 단전지 성능에 미치는 영향을 분석하고 비교하였다.