The phrase "artificial sources" is correct and usable in written English.
It can be used when referring to origins or inputs that are not natural, often in contexts related to technology, energy, or information.
Example: "The study analyzed the impact of artificial sources of energy on the environment."
Alternatives: "synthetic sources" or "man-made sources".
The absorption of minerals can also occur artificially, influenced by the composition of artificial sources such as sugar or syrup fed on by the bees.
But until recently, that damage was masked by artificial sources of growth, like the last decade's credit and housing bubbles.
Lay lights could also camouflage supplementary artificial sources; in 1857, the South Kensington Museum (now known as the Victoria and Albert) became the first museum to install gaslight so that working people could visit at night.
The residents of Talesh Mahalleh, for example, receive an average dose of 10 mGy per year – 10 times the International Commission on Radiological Protection's recommended limit from artificial sources.
Sunburn, acute cutaneous inflammation caused by overexposure to ultraviolet (UV) radiation of the so-called UVB wavelength band (290 320 nanometre; a nanometre is 10-9 metre), which originates from sunlight or artificial sources.
"But in reality," he said, "many of those earnings were built on artificial sources of income that were not only going to dry up but reversed course when the asset bubble popped".
The reservoir, in northern Westchester county, N.Y., was the city's first artificial source of water.
Spiders also react to aerial tones from an artificial source, such as a loudspeaker.
But the scientists conclude that if none of the other explanations work out, "An artificial source (human or non-human) must be considered".
Inside, Dr. Tarter plopped down in front of a computer and watched with a suspicious eye as the display popped with a row of numbers indicating that a narrow-band signal — the signature of an artificial source — had been detected.
In fact, the artificial source term in (43) is considered only to validate the numerical scheme and to discuss its convergence.
