in this paper‎, ‎we give the notions of crossed polymodule and cat$^1$-polygroup‎ ‎as a generalization of loday's definition‎. ‎then‎, ‎we define the pullback cat$^1$-polygroup and we obtain some results in this respect‎. ‎specially‎, ‎we prove that by a pullback cat$^1$-polygroup we can obtain a cat$^1$-group‎.

background and objectives : bartonella species are being recognized as increasingly important bacterial pathogens in veterinary and human medicine. these organisms can be transmitted by an arthropod vector or alternatively by animal scratches or bites. the objectives of this study were to identify contamination of cat's saliva and nail with b. henselae as a causative role to infect human in a s...

We implement Cryptography with Chaos following and extending the original program of Shannon with 3 selected Torus Automorphisms, namely the Baker Map, the Horseshoe Map and the Cat Map. The corresponding algorithms and the software (chaos_cryptography) were developed and applied to the encryption of picture as well as text in real time. The maps and algorithms may be combined as desired, creat...

Purpose: The development of metaheuristic algorithms has increased by researchers to use them extensively in the field business, science, and engineering. One common optimization is called Grey Wolf Optimization (GWO). algorithm works based on imitation wolves' searching process attacking grey wolves. main purpose this paper overcome GWO problem which trapping into local optima. Design or Metho...

Applying category labels to textual documents can be useful for 1) Search Indexing, 2) Document Filtering, and 3) Summarization. Many different algorithms have been proposed for applying category labels to text documents. We compare and contrast different approaches to text mining using Enterprise Miner for Text. INTRODUCTION The automatic classification of documents into categories is an incre...

Computational algorithmic thinking (CAT) is the ability to design, implement, and assess the implementation of algorithms to solve a range of problems. It involves identifying and understanding a problem, articulating an algorithm or set of algorithms in the form of a solution to the problem, implementing that solution in such a way that it solves the problem, and evaluating the solution based ...

We propose a distributed channel allocation algorithm based on a threshold scheme, called D-CAT, for cellular mobile networks. The algorithm employs two thresholds: (i) a heavy threshold for determining whether a cell is heavy, or overloaded, and for triggering the channel allocation algorithm; and (ii) a target threshold for indicating the target number of free channels that a heavy cell inten...