air in the intracranial vascular compartment is rare and only few case reports are published in the literature. without surgery or open head trauma, the origin of air bubbles in the venous sinus is still debated. we report an admitted patient in the emergency room one hour after a severe closed head injury, and in whom, the post-surgical cranial ct scan demonstrated feature of air embolism alon...

Interpreting observations of seepage into underground openings is often complicated by evaporative potentials created by the necessity to ventilate the openings. Evaporation removes liquid from the seepage face. By doing so, it reduces both the likelihood of seepage onset and the seepage flux, and thus can enhance the perceived effectiveness of the capillary barrier. We modeled liquid-release t...

tehran is one of the most polluted metropolises in the world. sink capacity for absorption and assimilation of pollution is reduced generally due to failure in inclusion of ecological aspects in regional land use development planning. the present condition of air and water related issues in tehran are greatly affected by landscape structural alterations at urban level. in this research the focu...

At first children sent here for treatment were mainly from the poorest homes. This is no longer so. The boys and girls, selected as the result of medical inspection from all the schools in Bradford?including secondary schools?are representative of every artisan class. No child is admitted here with any sort of infectious disease. Most suffer from ansemia and the ills that follow in its train. E...

Spectral ratios between soft soil and reference rock sites are often used to predict the sedimentary site response to earthquakes. However , their relationship with the genuine site-specific amplification function is often unclear. We compare the soil-to-rock spectral ratios between the stations that are 3.3 km apart with the "genuine" response given by the ratios between the surface and 17 and...

Strata and surface movement induced by mining under open-pit final slope is a huge 8 threat to mine safety. Physical model test is an important method to study mining-induced strata 9 and surface movement laws. Because of rock joints predominantly control rock mass deformation 10 and failure, thus physical model test leaving out of consideration of rock joints is difficult to reflect 11 the inf...

Open-Air Schools. By Leonard P. Ayres, Ph.D. New York: Doubleday, Page and Company, 1910. As a matter of fact we do not need Dr. Ayres' convincing representation of the splendid work done by open-air schools or the delightful photographs scattered through the volume to arouse our enthusiasm. The very name is sufficient. Open-air Schools! Let him who has never held his aching head in a stuffy sc...

Rock fragmentation is one of the desired results of rock blasting. So, controlling and predicting it, has direct effects on operational costs of mining. There are different ways that could be used to predict the size distribution of fragmented rocks. Mathematical relations have been widely used in these predictions. From among three proposed mathematical relations, one was selected in this stud...