The sporadic death of queen palms in one county in Florida was first brought to our attention in 2003. Recent conversations throughout the southern half of the state where queen palms are grown indicate the problem was observed in other counties at approximately the same time, which means we cannot blame the 2004 hurricane season for the spread of the problem. While initially less than 1% of th...

Abstract How many chess rooks or queens does it take to guard all squares of a given polyomino, the union square tiles from grid? This question is version art gallery problem in which guards can “see” whichever rook queen attacks. We show that $$\lfloor {\frac{n}{2}} \rfloor $$ ⌊n<mml...

In this paper, a quantum-inspired differential evolution algorithm for solving the N-queens problem is presented. The N-queens problem aims at placing N queens on an NxN chessboard, in such a way that no queen could capture any of the others. The proposed algorithm is a novel hybridization between differential evolution algorithms and quantum computing principles. Accordingly, differential evol...

A hitherto largely unresolved problem in behavioral biology is how workers are prevented from reproducing in large insect societies with high relatedness. Signals of the queen are assumed to inform the nestmates about her presence in the colony, which leads to indirect fitness benefits for workers. In the ant Camponotus floridanus, we found such a signal located on queen-laid eggs. In groups of...

-In this paper a Meta-heuristic approach for solving the N-Queens Problem is introduced to find the best possible solution in a reasonable amount of time. Genetic Algorithm is used with a novel fitness function as the Meta-heuristic. The aim of N-Queens Problem is to place N queens on an N x N chessboard, in a way so that no queen is in conflict with the others. Chromosome representation and ge...

In the use of Hopfield networks to solve optimization problems, a critical problem is the determination of appropriate values of the parameters in the energy function so that the network can converge to the best valid solution. In this paper, we first investigate the relationship between the parameters in a typical class of energy functions, and consequently propose a “guided trial-and-error" t...

A new error detection and correction methodology, defined as Horizontal-Vertical-Diagonal-N-Queen-Parity (HVDNQ), is proposed in this paper. This approach relies on five different types of parities: horizontal parity, vertical forward diagonal backward queen parity. method works an N X cell area can correct multi-bit upsets. The experimental analysis validates the effectiveness methodology by c...

given a set  of  points in the plane and a constant ,-center problem is to find two closed disks which each covers the whole , the diameter of the bigger one is minimized, and the distance of the two centers is at least . constrained -center problem is the -center problem in which the centers are forced to lie on a given line . in this paper, we first introduce -center problem and its constrain...