We derive models for chemosensitive movement based on Cattaneo’s law of heat propagation with finite speed. We apply the model to pattern formation as observed in experiments with Dictyostelium discoideum, with Salmonella typhimurium and with Escherichia coli. For Salmonella typhimurium we make predictions on pattern formation which can be tested in experiments. We discuss the relations of the ...

This paper is devoted to the overview of recent results concerning nonlocal systems of conservation laws. First, we present a predator – prey model and, second, a model for the laser cutting of metals. In both cases, these equations lead to interesting pattern formation.

The zooplankton community and environmental conditions were monitored during Dec. 2012 PG-GOOS (Persian Gulf and Gulf of Oman Oceanographic Study) oceanographic cruise on board N/V Ja Nayband throughout the northwestern part of the Persian Gulf. Data of temperature, salinity, depth and pH as well as zooplankton community composition and abundance were collected from 17 stations. The zoopla...

Introduction: Heavy metals widely used in the industrial and refining activities are frequently detected in sediments. The main objectives of this research were focused on determining the concentration of Cd and Pb in the sediments of Asaluyeh and compare with the standard. Methods: The concentration of Pb and Cd in the sediments of Nayband Bay area (contaminated area) and Lavar-e Saheli (cont...

BACKGROUND Large ornithopod tracks are known from the Upper Jurassic to the uppermost Cretaceous rocks of all continents but Antarctica. They include the tracks historically called Iguanodon footprints, iguanodontid footprints, hadrosaur/hadrosaurid footprints, and other large ornithopod tracks that have been used to define ichnotaxa. More than 40 ichnospecies based on large ornithopod tracks h...

Digital Image Analysis (DIA) has been employed to characterize the time evolution of a bubble injected from a single orifice into a pseudo 2-dimansional gas-solid fluidized bed. The injected bubble diameter increased with the square root of time before detachment. During bubble free flight in the bed, its diameter remains approximately constant. The center of mass of the bubble increases with t...

maghameh is one of the literary styles that has been created in the fourth century. the present article studies various aspects of this literary style. first it defines it and then studies its formation and growth followed by its characteristics, sources and different views on it. it attempts to study malek al shoara bahar’s works and his goals in using maghameh, affects and similes in his poet...