http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
공성석(Kong Sung-Suk),김동욱(Kim Dong-Wook),구자갑(Ku Ja-Kap),이송(Lee Song) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
The execution with respect to tunnel structure has been carried out more important than maintenance until present time. There is a lot of interests on the maintenance of institution that is used by the nation, because of the recent miserable accidents. Consequently there need an organizational and efficient system. This paper has presented the sort, source and part of damage of tunnel structures etc. and then performed to analyze about the special quality of tunnel structure through input detailed safety assessment report data as well as fulfilment statical analysis. In conclusion, the paper"s intention is presenting the maintenance system base on those.
FBPE를 함유하는 PET/PEN-FBPE 공중합체의 열적 기계적 성질
공이성(Lee Sung Kong),이영실(Young Sil Lee),윤관한(Kwan Han Yoon) 한국고분자학회 2017 폴리머 Vol.41 No.5
Fluorenylidenebis(2-phenoxyethanol)(FBPE)의 농도에 따라 PET/PEN-FBPE 공중합체를 제조하였다. 이때 PEN의 농도는 8 mol%로 고정하였다. 공중합체의 Tg는 FBPE의 함량에 따라 증가하였고, FBPE의 함량이 20 mol%일 때 117℃로 45℃증가하였다. 공중합체의 열분해온도 또한 FBPE의 함량에 따라 증가하여 FBPE가 없는 PET/PEN 공중합체의 값인 369℃에서 FBPE의 함량이 20 mol%인 PET/PEN-FBPE 공중합체의 값인 423℃로 54℃의 증가가 얻어졌다. 공중합체의 열변형온도 또한 FBPE가 없는 PET/PEN 공중합체의 값인 66℃에서 FBPE의 함량 20 mol%에서 105℃로 39℃ 증가하였다. 공중합체의 충격강도는 FBPE 함량에 따라 증가하였고 FBPE가 없는 PET/PEN 공중합체의 값인 6.2 J/m에서 FBPE의 함량 20 mol%에서 10.5 J/m로 증가하였다. FBPE 함량에 따라 탄성률에서는 큰 차이를 나타내지 않았지만 인장강도의 경우는 FBPE 함량에 따라 51 MPa에서 74 MPa로 증가하였다. 공중합체의 광투과율은 FBPE 함량에 따라 90%에서 87%로 약간 감소하는 경향을 보였다. PET/PEN-FBPE copolymers containing fluorenylidene bis(2-phenoxyethanol) (FBPE) were prepared with various FBPE concentrations. The concentration of PEN in PET/PEN copolymer was fixed at 8 mol%. The glass transition temperature of copolymer was increased from 72℃ for PET/PEN copolymer to 117℃ for PET/PEN-FBPE copolymer containing 20 mol% of FBPE. The thermal decomposition temperature of copolymer measured at 5 wt% loss was increased from 369℃ for PET/PEN copolymer to 423℃ for PET/PEN-FBPE copolymer containing 20 mol% of FBPE. Also, the heat deflection temperature was increased from 66 to 105℃ with FBPE concentration. The impact strength was also increased from 6.2 to 10.5 J/m with increasing FBPE concentration. The effect of FBPE on the tensile modulus was not observed, but the tensile strength increased from 51 to 74 MPa at 20 mol% loading of FBPE. The optical transparency of copolymer was slightly decreased from 90 to 87% with increasing FBPE concentration.
12주간의 저항성 트레이닝이 뇌졸중 편마비자의 보행능력과 신체활동에 미치는 영향
공성아(Sung A Kong) 한국사회체육학회 2009 한국사회체육학회지 Vol.0 No.37
The study was designed to investigate the effects of a 12-week resistance exercise training on gait ability and physical activity in stroke. Twenty six patients were volunteered to participate in the study as subjects and were assigned randomly into one of two groups, i.e., training group(n=15) and control group(n=11). In test, gait ability test and physical activity were measured. The subjects in the TR group went through the resistance exercise training utilizing the thera-band, performed for 60 minutes per session, three times per week for 12 weeks. The results obtained in the present study were as follows: 1) Gait ability test showed 10m gait test(sec, step) and 6 meter walking(sec) significant increase in the TR group due to the training(p<.05). 2) Physical activity showed energy expenditure(㎉/day), physical activity count(counts/day) and moderate activity time(min/day) significant increase in the TR group due to the training(p<.05). It was concluded that the 12-week resistance exercise training elicited the enhancement of the gait ability and physical activity.