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  2. Protected health information - Wikipedia

    en.wikipedia.org/wiki/Protected_health_information

    The 2018 Verizon Protected Health Information Data Breach Report (PHIDBR) examined 27 countries and 1368 incidents, detailing that the focus of healthcare breaches was mainly the patients, their identities, health histories, and treatment plans. According to HIPAA, 255.18 million people were affected from 3051 healthcare data breach incidents ...

  3. Euler's totient function - Wikipedia

    en.wikipedia.org/wiki/Euler's_totient_function

    Thus, it is often called Euler's phi function or simply the phi function. In 1879, J. J. Sylvester coined the term totient for this function, [14] [15] so it is also referred to as Euler's totient function, the Euler totient, or Euler's totient. [16] Jordan's totient is a generalization of Euler's. The cototient of n is defined as n − φ(n).

  4. Health Insurance Portability and Accountability Act - Wikipedia

    en.wikipedia.org/wiki/Health_Insurance...

    Under HIPAA, HIPAA-covered health plans are now required to use standardized HIPAA electronic transactions. See, 42 USC § 1320d-2 and 45 CFR Part 162. Information about this can be found in the final rule for HIPAA electronic transaction standards (74 Fed. Reg. 3296, published in the Federal Register on January 16, 2009), and on the CMS website.

  5. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    Alternatively, the conversion can be considered as two sequential rectangular to polar conversions: the first in the Cartesian xy plane from (x, y) to (R, φ), where R is the projection of r onto the xy-plane, and the second in the Cartesian zR-plane from (z, R) to (r, θ).

  6. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    where the Greek letter phi (⁠ ⁠ or ⁠ ⁠) denotes the golden ratio. [ a ] The constant ⁠ φ {\displaystyle \varphi } ⁠ satisfies the quadratic equation ⁠ φ 2 = φ + 1 {\displaystyle \textstyle \varphi ^{2}=\varphi +1} ⁠ and is an irrational number with a value of [ 1 ]

  7. Grain size - Wikipedia

    en.wikipedia.org/wiki/Grain_size

    is the Inclusive Graphic Standard Deviation in phi units ϕ 84 {\\displaystyle \\phi 84} is the 84th percentile of the grain size distribution in phi units, etc. The result of this can be described using the following terms:

  8. Phi - Wikipedia

    en.wikipedia.org/wiki/Phi

    Archaic form of Phi. Phi (/ f aɪ /; [1] uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖ pheî; Modern Greek: φι fi) is the twenty-first letter of the Greek alphabet.. In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ([pʰ]), which was the origin of its usual romanization as ph .

  9. Phi features - Wikipedia

    en.wikipedia.org/wiki/Phi_features

    Phi-features can also be considered the silent features that determine whether a root word is a noun or a verb. This is called the noun-verb distinction of Distributed Morphology . The table below describes how category classes are organized by their Nominal or Verbal characteristics.