Recently big data has become a hot research topic. The rising amounts of big data also increase the chance of violate the privacy of individuals. Since big data need high computational power and large storage, distributed systems are used. As multiple parties are concerned in these systems, the risk of privacy violation is improved. There have been a number of privacy-preserving methods develop...

People are facing a flood of data today. Data are being collected at unprecedented scale in many areas, such as networking[14][2][4], image processing[15][5], visualization[12], scientific computation, data base[17][18], and algorithms. The huge data nowadays are called Big Data. Big data is an all-encompassing term for any collection of data sets so large and complex that it becomes difficult ...

this study investigates relation between accruals quality and auditor selection in the listed firms of tehran stock exchange (tse) during a five-year period from 2007 to 2011.  using correlation method and logistic regression technique, the results of this study indicate that client size, management change and accruals quality impact on selection of the big audit firms.  the results of this res...

Over the past decades, several techniques have been employed to improve the applicability of the metaheuristic optimization methods. One of the solutions for improving the capability of metaheuristic methods is the hybrid of algorithms. This study proposes a new optimization algorithm called HPBA which is based on the hybrid of two optimization algorithms; Big Bang-Big Crunch (BB-BC) inspired b...

 The order graph of a group $G$, denoted by $Gamma^*(G)$, is a graph whose vertices are subgroups of $G$ and two distinct vertices $H$ and $K$ are adjacent if and only if $|H|big{|}|K|$ or $|K|big{|}|H|$. In this paper, we study the connectivity and diameter of this  graph. Also we give a relation between the order graph and prime  graph of a group.