We discuss an article by Le Bellac and Lévy-Leblond in which they have identified two Galilean limits of electromagnetism (1973 Nuovo Cimento B 14 217–33). We use their results to point out some confusion in the literature, and in the teaching of special relativity and electromagnetism. For instance, it is not widely recognized that there exist two well-defined non-relativistic limits, so that ...

The Standard Electromagnetism-like Mechanism (SEM) is one of the swarm-based optimization methods which is examined in this paper. The SEM works based on the charges in electrons and hence its operators have been especially designed for continuous space problems. Although the SEM was successfully applied to the standard optimization problems, it was not that notable when it came to tackling dis...

Drosophila melanogaster prefers to pupate in the dark, while its sibling species, D. simulans, prefers the light when the species are tested in isolation and when cultured and tested together. Reciprocal interspecific hybridizations were carried out and the F~ individuals were tested. Progeny from the cross of D. melanogaster females with D. simulans males chose pupations sites exactly intermed...

String theory compactifications may generate many light axion-like particles (ALPs) with weak couplings to electromagnetism. In general, a large number of ALPs exist, linear combination having potentially observable coupling The basis in which only one ALP couples electromagnetism is general misaligned the mass basis. This leads mixing between `electromagnetic' and `hidden' that do not interact...

The main purpose of this research is portfolio optimization in Tehran securities exchange using the black hole algorithm and the Gravitational Research algorithm. We also propose an algorithm named Hybrid Algorithm which combines the two algorithms above to cover the weaknesses of these two algorithms. Finally we compare the results with the Markowitz model and choose the optimal algorithm.<br ...

A data-mining approach is applied to optimize the energy consumption of an air handling unit. A multiperceptron ensemble algorithm is used to model a chiller, a pump, and the supply and return fans. A non-linear model is developed to minimize the total energy consumption of the air-handling unit while maintaining the temperature of the supply air and the static pressure in a predetermined range...

Nondestructive testing (NDT) of historic structures can be used for architectural archaeology, structural stability analysis, or materials characterization. Four types of physical probes are available: sound, penetrating radiation, visible light, and electromagnetism. Each of these can be utilized in several ways. Additional options involve hybrid techniques that combine probe methods. Widespre...

This paper presents an adaptive hybrid Chase-like algorithm for Reed-Solomon codes, which is based on the list decoding algorithm. The adaptive hybrid algorithm is based on the reliability threshold to exclude the more reliable bits from being processed by the list decoding algorithm and reduce the complexity of the hybrid algorithm. Simulation results show that the decoding complexities of the...