With high prices for fuel and airfare, companies are looking to minimize operational costs. Reducing aircraft fuel consumption is one strategy companies use to lower costs. During flights, commercial aircraft divide the cruise portion's range into cruise-steps, which are changes in altitude typically in increments of 2,000 ft. These cruise-steps allow the aircraft to ascend in a manner easily t...

We build, as far as theory will permit, self consistent model H II regions around central clusters of aging stars. These produce strong emission line diagnostics applicable to either individual H II regions in galaxies, or to the integrated emission line spectra of disk or starburst galaxies. The models assume that the expansion and internal pressure of individual H II regions is driven by the ...

Abstract Human-induced environmental change increasingly threatens the stability of socio-ecological systems. Careful statistical characterization concentrations is critical to quantify and predict consequences such changes on human ecosystems conditions. However, while are naturally defined as ratio between solute mass solvent volume, they have rarely been treated such, typically limiting anal...

Overweight and obesity is a growing epidemic among adults, adolescents, and children in the United States. Since 1980, rates of obesity have doubled among adults and tripled among children, and college students are not immune to this trend. This may be due, in part, to portion sizes that exceed individuals ' caloric needs. Although many studies have demonstrated that people's food consumption i...

Distribution and abundance of plants has been correlated with a variety of complex environmental gradients. Environmental factors affect plants growth and need to be understood by ecosystem managers. This study was carried out to examine the relationships between site factors and different vascular and non-vascular plants in north of Iran. For this purpose, vegetation and soil sampling was perf...

Environmental conditions and airborne myco£lora were measured concurrently in 10 turkey confinement houses during warm and cold weather. The following variables in the environment were measured: numbers of feedand litter-associated yeast and mold fungi, temperature, relative humidity, airspeed, carbon dioxide and ammonia concentration, airborne bacteria, and airborne particulate mass, particle ...

The aim of this paper is to compare various real estate valuation models and the manner in which they take into account environmental variables. The reference model is taken to be a standard linear regression model including ordinal variables to measure environmental quality. This type of model is widely used. It is first compared to linear models which incorporate environmental quality notes e...