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By 2019, fossil jet fuel production cost was $0.3-0.6 per L given a $50–100 crude oil barrel, while aviation biofuel production cost was $0.7-1.6, needing a $110–260 crude oil barrel to break-even. [19] As of 2020 aviation biofuel was more expensive than fossil jet kerosene, [1] considering aviation taxation and subsidies at that time. [72]
Linux is the leading operating system on servers (over 96.4% of the top one million web servers' operating systems are Linux), [48] leads other big iron systems such as mainframe computers, [clarification needed] [49] and is used on all of the world's 500 fastest supercomputers [h] (as of November 2017, having gradually displaced all competitors).
Psychology: Ghent University researcher Evelyne Debey and colleagues, for asking a thousand liars how often they lie, and for deciding whether to believe those answers. [ 231 ] Peace : University of Waterloo psychology researcher Gordon Pennycook and colleagues, for their scholarly study called "On the Reception and Detection of Pseudo-Profound ...
Sunlight on the surface of Earth is attenuated by Earth's atmosphere, so that less power arrives at the surface (closer to 1,000 W/m 2) in clear conditions when the Sun is near the zenith. [100] Sunlight at the top of Earth's atmosphere is composed (by total energy) of about 50% infrared light, 40% visible light, and 10% ultraviolet light. [ 101 ]
Repeated annual influenza vaccination generally offers consistent year-on-year protection against influenza. [100] There is, however, suggestive evidence that repeated vaccinations may cause a reduction in vaccine effectiveness for certain influenza subtypes; this has no relevance to recommendations for yearly vaccinations but might influence ...
The risk from sharing a needle during drug injection is between 0.63% and 2.4% per act, with an average of 0.8%. [72] The risk of acquiring HIV from a needle stick from an HIV-infected person is estimated as 0.3% (about 1 in 333) per act and the risk following mucous membrane exposure to infected blood as 0.09% (about 1 in 1000) per act. [ 54 ]
Zinc oxide is an inorganic compound with the formula Zn O.It is a white powder which is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants, [12] paints, sunscreens, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, semi conductors ...