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2. Telephone numbers in Saudi Arabia - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_Saudi...

   1755 - Mobile Customer Service Center ( Lebara Mobile) 900 - Telephone Customer Service Center ( STC) (They were separated before, 907 for Landline, 902 for Mobile, but since September 2015, they are merged) 933 - Saudi Electricity Customer Services. 937 - Saudi Ministry of Health Services. 939 - Saudi Water and Sewage Services (Eastern Region)

3. Unbiased rendering - Wikipedia

   en.wikipedia.org/wiki/Unbiased_rendering

   Path tracing and its derivatives can be unbiased, whereas ray tracing was originally biased. Mathematical definition. Mathematically speaking, the expected value (E) of an unbiased estimator is the population mean, regardless of the number of observations.

4. Distributed ray tracing - Wikipedia

   en.wikipedia.org/wiki/Distributed_ray_tracing

   Distributed ray tracing, also called distribution ray tracing and stochastic ray tracing, is a refinement of ray tracing that allows for the rendering of "soft" phenomena. Conventional ray tracing uses single rays to sample many different domains. For example, when the color of an object is calculated, ray tracing might send a single ray to ...

5. National Tracing Center - Wikipedia

   en.wikipedia.org/wiki/National_Tracing_Center

   The National Tracing Center (NTC) of the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) is the sole firearms tracing facility in the United States. It provides information to provide foreign (international), federal, state and local law enforcement agencies with suspects for firearm crime investigations, detect suspected firearms traffickers, and track the intrastate, interstate and ...

6. Field trace - Wikipedia

   en.wikipedia.org/wiki/Field_trace

   The trace form is used in algebraic number theory in the theory of the different ideal. The trace form for a finite degree field extension L/K has non-negative signature for any field ordering of K. The converse, that every Witt equivalence class with non-negative signature contains a trace form, is true for algebraic number fields K.

7. Contact tracing - Wikipedia

   en.wikipedia.org/wiki/Contact_tracing

   Contact tracing attempts to find all contacts of a confirmed case, in order to test or monitor them for infection. The goal is to stop the spread of a disease by finding and isolating cases. In public health, contact tracing is the process of identifying people who may have been exposed to an infected person ("contacts") and subsequent ...