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Approximately more than 90% of all coal production in Iranian undergroundmines is derived directly longwall mining method. Out of seam dilution is oneof the essential problems in these mines. Therefore the dilution can impose theadditional cost of mining and milling.
In this paper, we will propose a new synchronous stream cipher named DICING,which can be viewed as a clock-controlled one but with a new mechanism ofaltering steps. It has satisfactory performance and there have not been foundweakness for the known
The problem of optimal node density for ad hoc sensor networks deployed formaking inferences about two dimensional correlated random fields is considered.Using a symmetric first order conditional autoregressive Gauss-Markov randomfield model, large deviations results are used to characterize the asymptoticper-node
A path from s to t on a polyhedral terrain is descending if the height of apoint p never increases while we move p along the path from s to t. Noefficient algorithm is known to find a shortest descending
We consider games played on graphs with the winning conditions for theplayers specified as weak-parity conditions. In weak-parity conditions thewinner of a play is decided by looking into the set of states appearing in theplay, rather than the set of
We argue that the language of Zermelo Fraenkel set theory with definitionsand partial functions provides the most promising bedrock semantics forcommunicating and sharing mathematical knowledge. We then describe a syntacticsugaring of that language that provides a way of writing remarkably
Iterative Logic Arrays (ILAs) are ideal as VLSI sub-systems because of theirregular structure and its close resemblance with FPGAs (Field Programmable GateArrays). AND-EXOR based circuits are of interest in the design of very lowpower circuits where energy loss implied by
We turn `the' Church-Turing Hypothesis from an ambiguous source ofsensational speculations into a (collection of) sound and well-definedscientific problem(s):Examining recent controversies, and causes for misunderstanding, concerningthe state of the Church-Turing Hypothesis (CTH), suggests to study the CTHrelative to an arbitrary
A fundamental problem in distributed computing is the task of cooperativelyexecuting a given set of $t$ tasks by $p$ processors where the communicationmedium is dynamic and subject to failures. The dynamics of the communicationmedium lead to groups of processors being
Two-tier networks, comprising a conventional cellular network overlaid withshorter range hotspots (e.g. femtocells, distributed antennas, or wiredrelays), offer an economically viable way to improve cellular system capacity.The capacity-limiting factor in such networks is interference. The cross-tierinterference between macrocells and femtocells
Razborov and Rudich famously showed that so-called "natural proofs" are notuseful for separating P from NP unless hard pseudorandom number generators donot exist. Their result is widely regarded as a serious barrier to provingstrong lower bounds in circuit complexity theory.By
