Pristomyrmex tsujii sp. n., an endemic species of the Fiji islands, is described from the worker, ergatoid queen, alate queen and male castes. The alate queen and male castes of Pristomyrmex mandibularis Mann are also described for the first time. The ergatoid queens for both species appear to be morphologically intermediate between the worker and alate queen castes. Pristomyrmex tsujii is read...

effects of nitrogen fertilization timing close to the beginning of short-day period and white mulch on flowering and yield components have been studied in ‘paros’ and ‘queen elisa’ strawberry cultivars. split plot experiment in a randomized complete block design with eight treatments (two mulch treatments × n fertilization during four different times from last week of august to third week of se...

We def ine a faster algorithm functionally equivalent to the classical backtrack algorithm for assignment p rob lems , of wh ich the Eight Queens puzzle is an e l emen ta r y example (Fi l lmore & Williamson 1974, Knuth 1975 ] . Exper imental measurements (f igure 1) reveal r educ t i on by a factor of 2.5 for the 8-queens puzzle ( fac to r of 8.7 for 16 queens) in T, the number of pairtests p ...

Ovariectomy in Queens: Two portals Laparoscopy vs Conventional Approach Navid Salmanzadeh Zahedani1 , Jalal Bakhtiari1, DVM, PhD, Alizera Khalaj2, MD, Behnam Vafadari1 , D. V. M., Amir Niasari-Naslaji3, DVM, PhD Objective- The purpose of this study was to compare two portal laparoscopy and conventional approach for ovariectomy in queen. Design- Retrospective study. Animals- Adult healthy ...

The N-queens is a problem to place N queens on an N N chess board such that no queen can attack another. We designed a sequential program which attains an improvement in speed of from 7% to 14% compared to current programs. The proposed program is parallelized using MPI, and the number of solutions for the 24-queens problem is calculated for the first time. The main findings of the present stud...

Queen pheromones are chemical signals produced by reproductive individuals in social insect colonies. In many species they are key to the maintenance of reproductive division of labor, with workers beginning to reproduce individually once the queen pheromone disappears. Recently, a queen pheromone that negatively affects worker fecundity was discovered in the bumblebee Bombus terrestris, presen...

This paper discusses the implementation of Hopfield neural networks for solving constraint satisfaction problems using Field Programmable Gate Arrays (FPGAs). It discusses techniques for formulating such problems as discrete neural networks, and then it describes the N-Queen problem using this formulation. A prototype implementation of the a number of different NQueen problems is described and ...

We apply to the n× n chessboard the counting theory from Part I for nonattacking placements of chess pieces with unbounded straight-line moves, such as the queen. Part I showed that the number of ways to place q identical nonattacking pieces is given by a quasipolynomial function of n of degree 2q, whose coefficients are (essentially) polynomials in q that depend cyclically on n. Here we study ...

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...

We apply to the n × n chessboard the counting theory from Part I for nonattacking placements of chess pieces with unbounded straight-line moves, such as the queen. Part I showed that the number of ways to place q identical nonattacking pieces is given by a quasipolynomial function of n of degree 2q, whose coefficients are (essentially) polynomials in q that depend cyclically on n. Here we study...