investment plays a vital role on economic growth. one of the main objectives of all countries is to achieve sustainable economic growth and development. nowadays, a considerable amount of activities performed by the managers and investors in general is to make a portfolio of assets effectively meeting demand goals. in this study, mean-variance markowitz model by cardinality constraints and also...

A constrained version of the Big Bang-Big Crunch algorithm for the efficient solution of the optimal reservoir operation problems is proposed in this paper. Big Bang-Big Crunch (BB-BC) algorithm is a new meta-heuristic population-based algorithm that relies on one of the theories of the evolution of universe namely, the Big Bang and Big Crunch theory. An improved formulation of the algorithm na...

Metal oxide surge arrester accurate modeling and its parameter identification are very important for insulation coordination studies, arrester allocation and system reliability. Since quality and reliability of lightning performance studies can be improved with the more efficient representation of the arresters´ dynamic behavior. In this paper, Big Bang – Big Crunch and Hybrid Big Bang – Big Cr...

Penelitian ini dilatarbelakangi oleh kemauan guru untuk memperbaiki pembelajaran dikarenakan rendahnya sikap ilmiah siswa kelas VII MTs Mathla’ul Anwar Pontianak pada pelajaran biologi. kontekstual atau yang dikenal dengan CTL ( Contextual Teaching and Learning) adalah suatu strategi mengajar dimana konsep sedang dipelajari diberikan dalam situasi nyata sehingga memahami tersebut dan melihat ke...