The notion of -open sets in a topological space was studied by Velicko. Usha Parmeshwari et.al. and Indira introduced the concepts b# *b open respectively. Following this Ekici et. al. notions e-open e-closed mixing closure, interior, -interior -closure operators. In paper some new namely e#-open *e-open are defined their relationship with other similar concetps spaces will be investigated.

the energy of a graph is equal to the sum of the absolute values of its eigenvalues. two graphs of the same order are said to be equienergetic if their energies are equal. we point out the following two open problems for equienergetic graphs. (1) although it is known that there are numerous pairs of equienergetic, non-cospectral trees, it is not known how to systematically construct any such pa...

The paper proposes some comments and reflections on the notion of “openness” and on how it relates to three important topics: open standards, open formats, and open source. Often, these terms are considered equivalent and/or mutually implicated: “open source is the only way to enforce and exploit open standards”. This position is misleading, as it increases the confusion about this complex and ...

Open Access’ main goal is not the subversion of publishers’ role as driving actors in an oligopolistic market characterized by reduced competition and higher prices. OA’s main function is to be found somewhere else, namely in the ability to subvert the power to control science’s governance and its future directions (Open Science), a power that is more often found within the academic institution...

background: the municipal solid wastes (msws) are disposed in open dumps, which have no leachate collection and removal system, in the caspian region of iran. leachate readily reaches the nearby water resources such as streams, rivers, lakes, and sea. therefore, understanding the quality and quantity of open dump leachate is vital to the proper treatment of leachate. methods: the leachate sampl...

introduction: video-assisted thoracic surgery (vats) is now commonly used for primary spontaneous pneumothorax. in the present study we compared the outcomes of this technique with those obtained by conventional thoracotomy.material and methods: in this cross-sectional stud, forty patients were enrolled into two groups: vats (n=20) and thoracotomy (n=20). in both groups the blebs were resected ...