The k-median problem has been widely applied in many research fields such as clustering, logistic center etc. Its approximated algorithm has been interested by many computer theory scientists. In 2006, a reverse greedy algorithm for the metric k-median problem has been proposed by Chrobak and the approximative ratio is proved between Ω(lg(n)/lg(lg(n))) and Ω(lg(n)). In this paper, we present an...

Logistic performance has been improved tremendously in many parts of the world. Nonetheless, its improvement does not necessarily guarantee that environmental quality can be preserved. Hence, it is objective this study to examine effect logistic on degradation developing countries. Applying dynamic panel model estimator for a 50 countries period between 2010 and 2016, observes level pollution t...

Because of their flexibility, recently, much attention has been given to the study generalized distributions. A complete transmuted Kumaraswamy Logistic distribution is proposed, introducing some basic properties this distribution, such as quantile function, characteristic function and entropy are derived, well derivation maximum likelihood estimates parameters information matrix, Real life dat...

An important open problem in Reverse Mathematics ([16, 25]) is the reduction of the first-order strength of the base theory from IΣ1 to I∆0 + exp. The system ERNA, a version of Nonstandard Analysis based on the system I∆0 + exp, provides a partial solution to this problem. Indeed, Weak König’s lemma and many of its equivalent formulations from Reverse Mathematics can be ‘pushed down’ into ERNA,...

fab-less business model in semiconductor industry has led to serious concerns about trustworthy hardware. in untrusted foundries and manufacturing companies, submitted layout may be analyzed and reverse engineered to steal the information of a design or insert malicious trojans. understanding the netlist topology is the ultimate goal of the reverse engineering process. in this paper, we propose...