Since large droplets gravitationally settle rather quickly, droplet transmission is considered important at close range: in still air, a 50-micron droplet crosses a vertical 1.5m distance in 20 s (Drossinos and Housiadas 2006). Airborne transmission, also referred to as "aerosol transmission," ...
As SO2 has a tendancy to favorize the formation of low coulds, in addition to the contribution of sulphate particles to light reflexion, it is considered as a “climate cooler”. This being said, it is also the coumpound at the origin of acid rain, that have strong negative effects on...
An electronic cigarette (e-cigarette) is a battery-operated device that heats liquid nicotine, flavoring, and other additives to create an aerosol. Although e-cigarettes do not contain tobacco, for regulatory purposes, they are considered “tobacco products” by the US Food and Drug Administration ...
aYou know I love you, whether it is at the end of the world, or in the Cape. 您在海角知道我爱你,它是否在世界的末端,或者。[translate] ain the nouth 在nouth[translate] aPassengers are considered as secondary users of a vehicular network 乘客被考虑作为一个交通工具的网络的次要用户[translate...
“The team considered an idealized scenario in which solar radiation was reflected enough to offset the warming that would occur if carbon dioxide were to quadruple in concentration,” MIT said in a statement. The scientists discovered an amount of aerosol coverage required to offset that much more...
a3.1.1 Accommodation and reconfiguration strategies: Consider first the case where the analysis is performed off line, for given faults, which are known to possibly occur in the considered system (from the FMEA analysis, for example). Therefore, functions βi (ui (t), θi ) in cons...
Aerosol contains small particles of liquid or solid dispersed in a gas. What is the size of soil colloids? Particlesless than 0.001 mm sizepossess colloidal properties and are known as soil colloids. The inorganic and organic colloids are extremely small size - smaller than 2 micrometers in dia...
The COVID-19 pandemic has revived a decades-old debate about how respiratory diseases travel—which affects the safety practices experts recommend.
The flu vaccine is considered safe for a person with an egg allergy. An egg-free vaccine may be available. Your provider will tell you if you should get the egg-free vaccine instead. You may need tests before you can receive certain other vaccines. Your provider can give you more ...
aIt can be considered as the research and development department of a clothing factory,because it is in this department that the prototypes of garments are developed and prepared for selling and production. 它可以被考虑作为衣物工厂的研究与开发部门,因为是在这个部门服装原型为卖和生产被开发并且准备。