Little is known about the linearity of portable peak flow meters, or about physical gas factors affecting peak expiratory flow (PEF) readings. We therefore tested five portable peak flow meters of three types in an altitude chamber (sea level to 5,500 m) and in a climate chamber at sea level (7-37 degrees C) to determine the influence of the physical conditions of the gas on the reading of the ...

Bronchiolitis, a respiratory illness, is the leading cause of hospitalization for infants. The authors examined whether environmental factors contributed to the severity of the bronchiolitis illness. They compiled environmental data (temperature, dew point, wind speed, precipitation, altitude, and barometric pressure) to augment clinical data from a 30-center prospective cohort study of emergen...

Following the popularity of smart phones and the development of mobile Internet, the demands for accurate indoor positioning have grown rapidly in recent years. Previous indoor positioning methods focused on plane locations on a floor and did not provide accurate floor positioning. In this paper, we propose a method that uses multiple barometers as references for the floor positioning of smart ...

Now a days the increase in human population, irrigation of crops, flooded rice fields, unplanned sanitation, urban development, the migration of bird, rainfall, temperature, humidity and dry arid condition and the changing life style of the population in cities, urban, sub-urban and rural areas of our nation. Altitudinal variation of mosquitoes was studied by collecting the mosquitoes using hum...

Many birds fly at high altitude, either during long-distance flights or by virtue of residence in high-elevation habitats. Among the many environmental features that vary systematically with altitude, five have significant consequences for avian flight performance: ambient wind speeds, air temperature, humidity, oxygen availability, and air density. During migratory flights, birds select flight...

Reference evapotranspiration (ET0) is an important component of the global water cycle, and its long-term change directly influences regional supply demand balance. Under background change, investigating spatiotemporal trends in ET0 response to climate great importance for conservation rational utilization resources. Based on daily data from 91 meteorological stations during 1960–2017 Northeast...

The flight range of migrating birds depends crucially on the amount of fuel stored by the bird prior to migration or taken up en route at stop-over sites. However, an increase in body mass is associated with an increase in energetic costs, counteracting the benefit of fuel stores. Water imbalance, occurring when water loss exceeds metabolic water production, may constitute another less well rec...

It is generally accepted that there are no absolute contraindications to the movement of patients by air (1, 2). However, there are special physical and physiological factors that must be considered before subjecting a patient to the potentially hostile flight environment. The major considerations are altitude and airframe whilst minor considerations include space, noise, vibration, turbulence,...

This study examines the DigiCORA andGlobal Climate Observing SystemReferenceUpper-Air Network (GRUAN) humidity corrections of Vaisala RS92 radiosondes at three sites over the tropical Indian Ocean and surrounding areas during theDynamics of theMadden–Julian Oscillation (DYNAMO) field campaign in 2011. The proprietary DigiCORA correction algorithm is built into the ground station software provid...

The goal of this research is to assess the different low-cost sensors for flight altitude measuring a multirotor UAV at low flight. For optimizing sensor performances and accuracy, data filtering other methods were applied. collected stored later analysis with reference true altitude. correlation coefficient mean squared error calculated in order sensors' performance. On basis results study, it...