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Actress Kristen Stewart.The term has often been applied to describe her resting face, which she has acknowledged. [1]Resting bitch face (RBF) is a facial expression that unintentionally creates the impression that a person is angry, annoyed, irritated, or contemptuous, particularly when the individual is relaxed, or resting.
RBF may refer to: Organizations. Rassemblement Bruxelles-France, a Belgian political party; Reserve Bank of Fiji; Former Restaurant Trade Union, Denmark;
The Rockefeller Brothers Fund (RBF) is a philanthropic foundation created and run by members of the Rockefeller family. It was founded in New York City in 1940 as the primary philanthropic vehicle for the five third-generation Rockefeller brothers: John, Nelson, Laurance, Winthrop and David. It is distinct from the Rockefeller Foundation. The ...
A radial function is a function : [,).When paired with a norm on a vector space ‖ ‖: [,), a function of the form = (‖ ‖) is said to be a radial kernel centered at .A radial function and the associated radial kernels are said to be radial basis functions if, for any finite set of nodes {} =, all of the following conditions are true:
Since the value of the RBF kernel decreases with distance and ranges between zero (in the infinite-distance limit) and one (when x = x'), it has a ready interpretation as a similarity measure. [2] The feature space of the kernel has an infinite number of dimensions; for =, its expansion using the multinomial theorem is: [3]
In renal physiology, renal blood flow (RBF) is the volume of blood delivered to the kidneys per unit time. In humans, the kidneys together receive roughly 20 - 25% of cardiac output , amounting to 1.2 - 1.3 L/min in a healthy adult. [ 1 ]
Rubidium fluoride is a white crystalline substance with a cubic crystal structure that looks very similar to common salt (NaCl). The crystals belong to the space group Fm3m (space group no. 225) with the lattice parameter a = 565 pm and four formula units per unit cell. [2]
Rat-bite fever (RBF) is an acute, febrile human illness caused by bacteria transmitted by rodents, in most cases, which is passed from rodent to human by the rodent's urine or mucous secretions. Alternative names for rat-bite fever include streptobacillary fever, streptobacillosis, spirillary fever, bogger, and epidemic arthritic erythema.