김형섭 교수

Severe Plastic Deformation (SPD) is a generic designation of a group of metal-working techniques involving very large shear strains which are imposed, in combination with hydrostatic pressure, without any significant change in the overall dimensions of a specimen or a workpiece. This technique can produce miraculously fine grained structures below submicron scale. Equal channel angular pressing (ECAP) is a unique and relatively simple metal forming process to the other metal forming processes, b

It is the record that and and which are the three major essays of later years of Siki Masaoka are 9 month for approximately one year from February 16, 1901 to September 17, 1902. The condition of patient already turned worse, and Siki Masaoka of this time was in condition not to be able to be active by oneself. The essay that Bokujuitteki was published serially in a Japanese on 164 times from January 16, 1901 to July 2 of Siki Masaoka appears. Gyogamanroku that is the second work of the three ma

Pt/SBT/Seed/Pt/Ti/SiO₂/Si의 구조로 SBT(SrBi₂Ta₂O?)박막을 Self-seed layer를 사용하여 R.F. Magnetron sputter를 이용하여 증착을 하였다. Self-seed layer는 기판온도 RT(room temperature)와 600℃에서 두께 30 ㎚으로 증착하였다. Self-seed layer의 결정화 온도를 알아보기 위해 열처리온도를 변화시켰고 이를 XRD를 통하여 결정화 유무를 확인하였다. Self-seed layer 위에 증착한 SBT를 XRD와 전기적 측정을 통해 특성을 관찰하였다.

The purpose of the present study was to broaden our understanding about the antecedents for job turnover intention of hotel employee. In addition to the previously studied antecedents such as job stress, job satisfaction, Organizational commitment. The number of subjects of the study were 260 mail and female workers selected from hotel industries. The data analysis was done by SPSS/WIN Ver 10.0 and LISREL 8.50 package. An attempt was made to propose a model regarding the relations between job tu

지금까지 횡류홴의 설계와 성능해석에 관한 많은 연구가 이루어져 왔으나 아직까지도 정형적인 설계접근방법이 통용되고 있지 않은 실정이다. 본 연구에서는 스태빌라이져 설치각(θes)을 21o, 그리고 임펠러와 스테빌라이져의 간극(es)을 3.5 ㎜ 고정하고 리어가이더에 대한 임펠러 출구각 및 직경비 변화가 횡류홴의 내부 유동 및 성능 특성에 미치는 영향을 분석하고자 한다.

In this paper, the connection details of the prefabricated RC/SRC columns and a concrete-encased U-shaped steel beam is presented, and their seismic resistance performance is evaluated through a full-scale test. One of the life-scale column specimens for the test is a prefabricated RC column built with reinforcing bars, and the other one is a prefabricated SRC column built with L-shaped angle steels and reinforcing bars. Both of the columns are fully fabricated at factory by precise shop welding