منابع مشابه
Secondhand smoke in Israeli bars, pubs and cafes.
BACKGROUND Secondhand smoke poses a serious health hazard. In Israel the recent passage of a law designed to protect people from secondhand smoke in public places was greeted with controversy. The debate is taking place without data on actual levels of pollution for secondhand smoke in public places. OBJECTIVES To estimate levels of small respirable suspended particles, atmospheric markers of...
متن کاملThe librarian and the information scientist: Different perceptions among Israeli information science students
This study examined the perceptions of 118 undergraduate information science students enrolled in three different higher education programs in Israel. The classical roles traditionally performed in libraries are still perceived as tasks of the librarian. Tasks related to information itself, such as information retrieval (building, operating, and managing Web sites), information filtering, and m...
متن کاملCounter-rotating bars within bars
The dynamical stability and evolution of disc galaxies with different disc thickness as well as various fraction and concentration of stellar counter-rotation is investigated with self-consistent numerical simulations. In particular, systems of nested, counter-rotating, stable bars are presented. As for the direct case, the nuclear secondary bar rotates faster than the primary bar. Contrary to ...
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ژورنال
عنوان ژورنال: Nature
سال: 1978
ISSN: 0028-0836,1476-4687
DOI: 10.1038/271605a0