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  2. Substantial Presence Test - Wikipedia

    en.wikipedia.org/wiki/Substantial_Presence_Test

    The Substantial Presence Test (SPT) is a criterion used by the Internal Revenue Service (IRS) in the United States to determine whether an individual who is not a citizen or lawful permanent resident in the recent past qualifies as a "resident for tax purposes" or a "nonresident for tax purposes"; [1] [2] it is a form of physical presence test.

  3. Immune-related response criteria - Wikipedia

    en.wikipedia.org/wiki/Immune-Related_Response...

    In the irRC, by contrast, new lesions are simply a change in tumour burden. The irRC retained the bidirectional measurement of lesions that had originally been laid down in the WHO Criteria. Assessment of immune-related response. In the irRC, an immune-related Complete Response (irCR) is the disappearance of all lesions, measured or unmeasured ...

  4. IRRC - Wikipedia

    en.wikipedia.org/wiki/IRRC

    Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. IRRC may stand for: Independent Regulatory Review Commission ...

  5. Physical presence test - Wikipedia

    en.wikipedia.org/wiki/Physical_presence_test

    The "physical presence in Australia test" is one of the three tests under Australian law through which a charitable institution may be entitled to the income tax-exempt charity endorsement; the others are the "deductible gift recipient test" and the "prescribed by law" test. The two elements of the test are whether the institution has a ...

  6. Energy release rate (fracture mechanics) - Wikipedia

    en.wikipedia.org/wiki/Energy_release_rate...

    In fracture mechanics, the energy release rate, , is the rate at which energy is transformed as a material undergoes fracture.Mathematically, the energy release rate is expressed as the decrease in total potential energy per increase in fracture surface area, [1] [2] and is thus expressed in terms of energy per unit area.

  7. Rainflow-counting algorithm - Wikipedia

    en.wikipedia.org/wiki/Rainflow-counting_algorithm

    Rainflow counting identifies the closed cycles in a stress-strain curve. The rainflow-counting algorithm is used in calculating the fatigue life of a component in order to convert a loading sequence of varying stress into a set of constant amplitude stress reversals with equivalent fatigue damage.

  8. Stress intensity factor - Wikipedia

    en.wikipedia.org/wiki/Stress_intensity_factor

    For the situation where the plate is large compared to the size of the crack and the location of the force is relatively close to the crack, i.e., , , , , the plate can be considered infinite. In that case, for the stress intensity factors for F x {\displaystyle F_{x}} at crack tip B ( x = a {\displaystyle x=a} ) are [ 11 ] [ 12 ]

  9. J-integral - Wikipedia

    en.wikipedia.org/wiki/J-integral

    The J-integral represents a way to calculate the strain energy release rate, or work per unit fracture surface area, in a material. [1] The theoretical concept of J-integral was developed in 1967 by G. P. Cherepanov [2] and independently in 1968 by James R. Rice, [3] who showed that an energetic contour path integral (called J) was independent of the path around a crack.