منابع مشابه
Production of artificial stone slabs using waste granite and marble stone sludge samples
In this work, the waste stone sludge obtained from the granite and marble stone processing factories was used for the manufacture of artificial stones using vibratory compaction in a vacuum environment. The results obtained showed that water absorption and density increased, and the flexure, compressive, and tensile strengths decreased with increase in the content of the waste stone sludge. The...
متن کاملStone 6: Artificial Sedimentary Meteorites in Space
stetter, H.G.M. Edwards, C.S. Cockell, J. Parnell, J. Pillinger, S. Sancisi-Frey, I. Franchi,, G. Kurat, A. Brack. 1 Centre de Biophysique Molécualire-CNRS and Université d’Orléans, 45071 Orléans cedex 2, France ([email protected]). 2 European Space & Technology Centre (ESTEC), Keplerlaan 1, Postbus 299, 2200 AG Noordwijk, The Netherlands. Naturhistorisches Museum, Burgring 7, 1010 Wien. ...
متن کاملA New Restricted Earth Fault Relay Based on Artificial Intelligence
The restricted earth fault (REF) relay is a type of differential protection which is used for detection of internal ground faults of power transformers. But, during external faults and transformer energization conditions, the probability of current transformer (CT) saturation increases. Thus, the spurious differential current due to CT saturation, can lead to REF relay maloperation. In this pap...
متن کاملRespirable Silica Dust Suppression During Artificial Stone Countertop Cutting
PURPOSE To assess the relative efficacy of three types of controls in reducing respirable silica exposure during artificial stone countertop cutting with a handheld circular saw. APPROACH A handheld worm drive circular saw equipped with a diamond segmented blade was fitted with water supply to wet the blade as is typical. The normal wetted-blade condition was compared to (i) wetted-blade plus...
متن کاملArtificial lungs: a new inspiration.
An estimated 16 million Americans are afflicted with some degree of chronic obstructive pulmonary disease (COPD), accounting for 100,000 deaths per year. The only current treatment for chronic irreversible pulmonary failure is lung transplantation. Since the widespread success of single and double lung transplantation in the early 1990s, demand for donor lungs has steadily outgrown the supply. ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1890
ISSN: 0036-8733
DOI: 10.1038/scientificamerican11081890-12387bsupp