Departures from axisymmetric balance dynamics are quantified during a case of secondary eyewall formation. The case occurred in a three-dimensional mesoscale convection-permitting numerical simulation of a tropical cyclone, integrated from an initial weak mesoscale vortex in an idealized quiescent environment. The simulation exhibits a canonical eyewall replacement cycle. Departures from balanc...

We perform non-LTE calculations of lithium in late-type stars for a wide range of stellar parameters, including quantum mechanical cross-sections for collisions with neutral hydrogen and the negative hydrogen ion. Non-LTE abundance corrections for the lithium resonance line at 670.7 nm and the subordinate line at 610.3 nm, are calculated using 1D MARCS model atmospheres spanning a grid Teff = [...

New H I synthesis data have been obtained for six face–on galaxies with the Very Large Array. These data and reanalyses of three additional data sets make up a sample of nine face–on galaxies analyzed for deviations from axisymmetry in morphology and dynamics. This sample represents a subsample of galaxies already analyzed for morphological symmetry properties in the R-band. Four quantitative m...

Songbird migrants use stopovers between flight bouts to rest and refuel for the upcoming flights. Behaviours affecting where, when and how long to stay at stopover sites will affect how successful the overall migration will be, which has significant consequences for the overall fitness and mortality of the birds. The main purpose of this work was to investigate stopover behaviours in free-flyin...

Coordination of operations with spatially and temporally shared resources, such as route segments, fixes, and runways, improves the efficiency of terminal airspace management. Problems in this category are, in general, computationally difficult compared to conventional scheduling problems. This paper presents a fast time algorithm formulation using a non-dominated sorting genetic algorithm (NSG...

Insight into the factors that influence patterns of species diversity can be obtained by comparing real patterns to their counterparts derived under a model of randomness or a null model. For example, intraspecific aggregation is very common among a wide variety of protozoan, plant, and animal taxa. Despite this, ecologists do not yet fully appreciate the potential effect of intraspecific aggre...

this paper aims to predict and determine the net supply of manpower in islamic azad university - firouzkouh branch of for a specific period of time. for this purpose, markov chain model is used to analyze human resources data obtained previously. at last, the number of labors, arrivals, departures, shortages and also surpluses of each unit will be predicted for the next 5 years during 2011-2015...