Online auction systems have made remarkable progress in recent years. However, one of the most severe and persistent problems in such systems is shilling behavior, which is a type of auction fraud where a bidder artificially drives up the bidding price so that the winner of the auction has to pay more than he otherwise would pay. Verification of shill bidders in an online auction is difficult d...

Bargaining with reading habit is no need. Reading is not kind of something sold that you can take or not. It is a thing that will change your life to life better. It is the thing that will give you many things around the world and this universe, in the real world and here after. As what will be given by this real time systems specification verification and analysis, how can you bargain with the...

We call a family G ⊂ P[n] a k-generator of P[n] if every x ⊂ [n] can be expressed as a union of at most k disjoint sets in G. Frein, Lévêque and Seb˝ o [1] conjectured that for any n ≥ k, such a family must be at least as large as the k-generator obtained by taking a partition of [n] into classes of sizes as equal as possible, and taking the union of the power-sets of the classes. We generalize...

ION OF ENGINEERING SIMULATION PROCESSES.....................................................................................7 MAPPING THE ENGINEERING SIMULATION INTO THE SIMULATION-BASED DESIGN PROCESS.....................................8 Levels of Models............................................................................................................................................8...

This column is about the problem of verifying that computing systems relate properly to the passage of physical time. While the crucial importance of the real-time veri cation problem has long been realized in practice, the problem has stirred the interest of the theory community only recently, and only halfheartedly at that. As far as the authors can tell, the two main arguments that are usual...

A novel evaluation metric is introduced, based on the Discernibility concept. This metric, the Distance-based Index of Discernibility (DID) aims to provide an accurate and fast mapping of the classification performance of a feature or a dataset. DID has been successfully implemented in a program which has been applied to a number of datasets, a few artificial features and a typical benchmark da...

The objective of this paper is to offer an improvement to the translation from ECTL to SAT introduced in [7] and show that the improvement proposed substantially increases the efficiency of verifying temporal properties using the Bounded Model Checking method. keywords: ECTL, Bounded Model Checking, translation to SAT