نتایج جستجو برای: air spring

تعداد نتایج: 255007  

2014
Jennifer A. Curtis Lorraine E. Flint Alan L. Flint Jessica D. Lundquist Brian Hudgens Erin E. Boydston Julie K. Young

We present a unique water-balance approach for modeling snowpack under historic, current and future climates throughout the Sierra Nevada Ecoregion. Our methodology uses a finer scale (270 m) than previous regional studies and incorporates cold-air pooling, an atmospheric process that sustains cooler temperatures in topographic depressions thereby mitigating snowmelt. Our results are intended t...

Journal: :Scientific Journal of Silesian University of Technology. Series Transport 2019

2015
William Daniel Robinson Jerald M. Vogel James E. Bernard Judy M. Vance Greg R. Luecke Brian L. Steward

This research investigates a pneumatic suspension system containing an air spring, air flow valve, and an accumulator, where the spring and damping functions are combined into one package. The spring and accumulator provide the spring characteristics, and the computer controlled adjustable valve provides the damping characteristics by automatically adjusting the air flow between the air spring ...

2016
Xiaoyan Wang Kaicun Wang Liangyuan Su

This study analyzed hourly mass concentration observations of PM2.5 (particulate matters with diameter less than 2.5 μm) at 512 stations in China from December 2013 to May 2015. We found that the mean concentrations of PM2.5 during the winter and spring of 2015 Dec. 2014 to Feb. 2015 and Mar. 2015 to May 2015) decreased by 20% and 14% compared to the previous year, respectively. Hazardous air-q...

Journal: :Journal of environmental biology 2011
Z Dolenec P Dolenec

Recent papers have shown that climate change affects many species, including birds. Several papers from different areas have devoted attention to the negative correlation between the dates of breeding and year, and also negative correlation between the dates of breeding and air spring temperatures. Recent work give some firm evidence for postulating causal relationship between spring temperatur...

2015
Fernanda Carmen Fuoco Luca Stabile Giorgio Buonanno Aldo Russi Mandana Mazaheri Lidia Morawska Alexandro Andrade Pasquale Avino

Characterization of indoor air quality in school classrooms is crucial to children’s health and performance. The present study was undertaken to characterize the indoor air quality in six naturally ventilated classrooms of three schools in Cassino (Italy). Indoor particle number, mass, black carbon, CO2 and radon concentrations, as well as outdoor particle number were measured within school hou...

2015
Shinsuke Iwasaki Atsuhiko Isobe Yasuyuki Miyao

The influence of sea surface temperature (SST) on atmospheric processes over the open ocean has been well documented. However, atmospheric responses to SST in coastal waters are poorly understood. Oceanic stratification (and consequently, SST) in coastal waters largely depends on the fortnightly spring-neap tidal cycle, because of variations in vertical tidal mixing. Here we investigate how cha...

Journal: Desert 2008
E. Fattahi K. Noohi

Frost is one of the atmospheric phenomena which seriously threaten crop production. It also causes numerousaccidents in mountainous roads. In this research the Spatial Synoptic Classification SSC method was employed toclassify the type of air masses. For the classification, such meteorological data as: temperature, dew point, mean sealevel pressure, cloudiness, direction and speed of wind were ...

Journal: :Allergologia et immunopathologia 2014
M A Tosca S Ruffoni G W Canonica G Ciprandi

BACKGROUND Asthma exacerbation is an episode of (sub)acute worsening of asthmatic symptoms. Exacerbation may depend on environmental factors. OBJECTIVE The present study investigated emergency calls for asthma exacerbation in children, analysing: i) their trend over the course of time; and ii) their possible relationship with environmental factors, including pollen count, meteorological param...

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