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( Yehudith Kahn ),( Audrey Dumas ),( Eshet Yovav ) 부산외국어대학교 지중해지역원 2015 The Mediterranean Review Vol.8 No.2
The aim of this paper is to evaluate the effects of migration from Middle Eastern countries, during the 1990s, on individual perceptions of migrant households’ subjective economic well-being. We consider data from household surveys conducted in Egypt, Turkey and Morocco in 1997. Using probit models, first we analyze the characteristics of migrants, secondly we determine the impact of migration on current subjective poverty, and thirdly we analyze to what extent the returns from migration are heterogeneous according to the individual``s financial perception. We find that the effects of migration on financial situation vary according to the country: in Morocco migration reduces subjective poverty for the less educated long term migrants, and in Egypt only for return migrants. Surprisingly, in Turkey, migration increases subjective poverty especially for highly educated migrants. These results imply that migration cannot be treated as a homogenous phenomenon, as migration may impact differently on different countries of origin.
Kang,Byung-Cheol,Farman,Allan George,Burson,Stacee Dumas 大韓口腔顎顔面 放射線學會 1994 Imaging Science in Dentistry Vol.24 No.2
이 연구의 목적은 Philips Oralix Pan DC, GE Panelipse, SS White Panorex 1, SS White Panorex 2의 4종의 X-선기기로 촬영한 파노라마 방사선사진상에서 치아장축 각도측정시 오차 허용도에 따른 정확도를 비교평가하는 것이다. 파노라마 방사선사진 촬영기에서 건조두개골을 (1)정확한 촬영위치, (2)전방 5㎜이동, (3) 후방 5㎜이동, (4) 전방 10? 기울인 위치, (5)두개골을 후방 10? 기울인 위치 (6)두개골을 좌측으로 5㎜ 이동 시킨위치 등 촬영 위치를 6가지로 변화시켜서 임의로 정한 평면 기준선과 협측의 치아장축과의 각도를 측정하여 건조두개골에서의 실측치와 비교하였다. 그 결과는 다음과 같았다. 1. 치아장축의 각도 측정결과는 파노라마 X-선 촬영기의 종류 및 촬영위치에 관계없이 건조두개골에서의 측정치와 방사선사진상의 측정치의 유의성있는 상관관계를 갖었다.(p<0.05) 2. 건조두개골에서의 치아장축 각도 측정치를 기준으로 정확한 촬영위치에서 촬영한 파노라마 방사선 사진상의 오차 허용도를 +/-3? 로 하였을때, SS White Panorex 1 은 측정치의 74%, GE Panelipse는 측정치의 67%, Philips Oralix Pan DC와 SS White Panorex 2는 측정치의 64%가 이 오차의 범위내에 있었다. 3. 건조두개골에서의 치아장축 각도 측정치를 기준으로 정확한 촬영위치에서 촬영한 파노라마 방사선 사진상에서의 오차 허용도를 +/-5?로 하였을때, SS White Panorex 1과 GE Panelipse는 측정치의 89%, Philips Oralix Pan DC는 측정치의 85%, SS White Panorex2는 측정치의 81%가 이 오차의 범위내에 있었다. Panoramic radiographs of a dry skull were used to evaluate the accuracy of four panoramic dental X-ray systems in determining tooth angulations in the buccal segments. The four machines evaluated were the Philips Oralix Pan DC, the GE panelipse, the SS White panorex 1, and the SS White Panorex 2. Panoramic radiographs were taken at six different patient positions for each machine to evaluate the effects of patient positioning on determining tooth angulations in the buccal segments. All of the machines studied showed a significant correlation between the mean radiographic estimates and the actual measurements regardless of positioning(p<0.05). With correct placement of the skull, the results were analyzed for an error tolerance of +/-3? between the actual measurements and the radiographic estimates for tooth angulation. The SS White Panorex 1 was accurate 74% of the time, the GE Panelipse was accurate 67% of the time, the Philips Oralix Pan DC and the SS White Panorex 2 were accurate 64% of the time. When an error tolerance +/-5? was permitted, the accuracy was 89% for the SS White Panorex 1 and the GE Panelipse, 85% for the Philips Oralix Pan DC, and 81% for the SS White Panorex 2.