Results 11 to 20 of about 172,231 (266)

Can video communication in the emergency medical communication centre improve dispatch precision? A before–after study in Norwegian helicopter emergency medical services

open access: yesBMJ Open, 2023
Objectives Dispatching helicopter emergency medical services (HEMS) to the patients with the greatest medical or logistical benefit remains challenging.
Andreas J Krüger   +5 more
doaj   +1 more source

Numerical Simulation Study of a Swirling Drill Bit Used for Ice Core Drilling

open access: yesJournal of Marine Science and Engineering, 2022
Due to its high mechanical penetration rate and lack of pollution of the environment, air reverse circulation drilling is considered to be a promising method for ice drilling.
Mengke Wang   +4 more
doaj   +1 more source

The efficiency of windbreaks on the basis of wind field and optical porosity measurement

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2008
Windbreaks have been used for many years to reduce wind speed as a wind-erosion control mea­su­re. To assessment of windbreak efficiency two main parameters are using: height of windbreak (H) and aerodynamic porosity.
Tomáš Středa   +3 more
doaj   +1 more source

Thermal stress in the northern Carpathians and air circulation

open access: yesMiscellanea Geographica: Regional Studies on Development, 2020
In mountain areas, air circulation plays a major role in the forming of the climate. This paper examines how it influences thermal stress in the northern Carpathians. The Niedźwiedź’s classification of air circulation was applied.
Krzysztof Błażejczyk   +6 more
doaj   +1 more source

The Significance of Air Circulation and Hearth Location at Paleolithic Cave Sites

open access: yesOpen Quaternary, 2019
Hearths were constructed and used at Paleolithic cave and rockshelter sites in Africa, Europe and Asia as early as the late Lower Paleolithic period. The advantages of the use of fire have been widely researched for the last decades.
Yafit Kedar, Ran Barkai
doaj   +1 more source

Effects of Ratio of Dynamic Circulation to Evaporation Rates on Exergy and Cooling Efficiencies an Evaporative Cooler [PDF]

open access: yesJournal of Heat and Mass Transfer Research, 2022
The expected performance characteristics of a wet media in an evaporative cooler with the specified geometric and material aspects are reducing the dry-bulb temperature and increasing the moisture content of the air outlet.
Behzad Omidi Kashani
doaj   +1 more source

Ventilation Study in Achieving Thermal Comfort at Ice Cream Café in Malang City [PDF]

open access: yesE3S Web of Conferences, 2023
— Café is a retail F&B place for eating and drinking fast food and presenting a relaxed or informal atmosphere. Café, which is a public space where customers spend time, of course, must maintain ventilation in the café to ensure the customer’s thermal ...
Nabillah Salsa   +3 more
doaj   +1 more source

Effects of Indoor Air Curtain and Fan on Cross-Infection Risk for a Space with Displacement Ventilation [PDF]

open access: yesE3S Web of Conferences, 2023
Air curtain is an effective control for separating air spaces and reducing the cross-transfer of air, heat, and contaminant between different zones.
Robinson Austin, Zhai Zhiqiang (John)
doaj   +1 more source

Linking air stagnation in Europe with the synoptic- to large-scale atmospheric circulation [PDF]

open access: yesWeather and Climate Dynamics, 2021
The build-up of pollutants to harmful levels can occur when meteorological conditions favour their production or accumulation near the surface. Such conditions can arise when a region experiences air stagnation.
J. W. Maddison   +6 more
doaj   +1 more source

THE PECULIARITIES OF THERMAL INDUCEMENT VENTILATION SYSTEMS

open access: yesВестник СибАДИ, 2018
Introduction. For increasing the efficiency of natural ventilation systems, it is possible to use the thermal incentives - additional heating of the exhaust  ventilation duct, which allows to expand temperature difference between  ambient and exhaust air
D. V. Abramkina
doaj   +1 more source

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