منابع مشابه
Some Properties of rw-Sets and rw-Continuous Functions
In 1937, Stone [6] introduced and investigated the regular open sets. These sets are contained in the family of open sets since a set is regular open if it is equal to the interior of its closure. In 1978, Cameron [2] also introduced and investigated the concept of a regular semiopen set. A set A is regular semiopen if there is a regular open set U such that U ⊆ A ⊆ U . In 2007, a new class of ...
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Nowadays, because of their innovative and scholarly nature, the scientific-research articles are taken into account as the best and sometimes the only judging criterion of their authors and scientific community. Therefore, all those who work in the academic fields and are working as A.M. and doctorate students or teachers are required to test their proficiency and to show that they are qualifie...
متن کاملThe nature of public-private partnership
To explaining the public-private partnership matter, we have to search about the answer of this questions: public-private partnership Is subject of what kind of legal contracts? private law? Administrate law? And what kind of Outstanding feature make it difference from other contracts.in order to finding the answer we Explained the concept of partnership, the definition of governmental contract...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Sextantis in an excited , low state
We present low-resolution spectrophotometric optical observations of the eclipsing nova-like cataclysmic variable SW Sex, the prototype of the SW Sex stars. We observed the system when it was in an unusual low state. The spectrum is characterized by the presence of strong Heii and Civ emission lines as well as the normal single peaked Balmer emission lines. The radial temperature profile of the...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1987
ISSN: 0252-9211
DOI: 10.1017/s0252921100104828