Background: Health is a very essential issue in our world. From the classic and traditional medicine point of view, our surroundings and habitat including geographic location, climatic conditions , eating and drinking habits , training and emotions, contribute to a healthy life style. With an overview in traditional medicine, it is clear that there is another important aspect in preventive medi...

Old World cover well-documented events, and to European readers the greatest interest lies in the essays-about a third of the total here presented-that deal with the emergence of ophthalmology in the United States during the second half of the last century. As elsewhere, saints and sinners-generally colourful-pass across the stage; and tragedy too, as shown by the essay on Homberger. ARNOLD SORSBY

cancer is one of the three main causes of mortality in most human communities whose prevalence is being increased. a significant part of health budget in all countries has been allocated to treat the cancer, which is incurable in many cases. it has led the global health attitude to cancer prevention. many cancer‑related risk factors have been identified for which preventive recommendations have...

This article is devoted to two different generalizations of projective Boolean algebras: openly generated Boolean algebras and tightly σ-filtered Boolean algebras. We show that for every uncountable regular cardinal κ there are 2 pairwise non-isomorphic openly generated Boolean algebras of size κ > א1 provided there is an almost free non-free abelian group of size κ. The openly generated Boolea...