Synthesis Reaction of 1a,b with 2-aminothiophenol and sodium ethanolate in ethanol does not give the expected tetracyclic ring systems, but surprisingly the spirocompounds 2 are obtained. A [2+4] cycloaddition of the intermediately formed 1,2-benzoquinone-2-imine-1-thione with the aurone was postulated. Under these conditions the thioaurones 1c,d showed no reaction. After reaction of 1with 2-am...

the aims of this study were to assess the energy and economic flows of biodiesel production from olive pomace oil using transesterification method with ultrasound waves. for this purpose biodiesel production from this feedstock were examined through a life-cycle process with considering five main stages of agricultural production, transportation, olive oil extraction, pomace oil extraction and ...

In this article, two different systems subject to shocks occurring based on a non-homogeneous Poisson process (NHPP) are analyzed. Type –I system is consisted of a single unit and type –II system is consisted of two parallel units in which both units operate identically and simultaneously. In type –I system occurrence of a shock causes system stopping and consequently will be received minimal r...

abstract: the main objective of this paper is to investigate the leadership style between public and private bank and its impact on the job satisfaction in iran. for this purpose, the relationship between transformation and transactional leadership and job satisfaction and the effect of managers’ decision-making strategy and employee’s job perception on it have been considered empirically. the ...

In this paper, we develop a novel homotopy smoothing (HOPS) algorithm for solving a family of non-smooth problems that is composed of a non-smooth term with an explicit max-structure and a smooth term or a simple non-smooth term whose proximal mapping is easy to compute. The best known iteration complexity for solving such non-smooth optimization problems is O(1/ ) without any assumption on the...

Two stages DEA models are used in many fields of management and industry. One of the concepts that has attracted the attention of researchers in the theory of production is the concept of ranking the units with a two-stage network. A unit ranking can provide useful information to decision makers (DMUs) about optimal decision making activities. This concept defines the superiority of a unit in t...