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  2. Focus (geometry) - Wikipedia

    en.wikipedia.org/wiki/Focus_(geometry)

    In geometry, focuses or foci (/ ˈ f oʊ k aɪ /; sg.: focus) are special points with reference to which any of a variety of curves is constructed. For example, one or two foci can be used in defining conic sections , the four types of which are the circle , ellipse , parabola , and hyperbola .

  3. Atmel AVR instruction set - Wikipedia

    en.wikipedia.org/wiki/Atmel_AVR_instruction_set

    LPM instructions zero-extend the ROM address in Z; ELPM instructions prepend the RAMPZ register for high bits. This is not the same thing as the more general LPM instruction; there exist "classic" models with only the zero-operand form of ELPM (ATmega103 and at43usb320). When auto-increment is available (most models), it updates the entire 24 ...

  4. ATmega328 - Wikipedia

    en.wikipedia.org/wiki/ATmega328

    ATmega328 is commonly used in many projects and autonomous systems where a simple, low-powered, low-cost micro-controller is needed. Perhaps the most common implementation of this chip is on the popular Arduino development platform, namely the Arduino Uno, Arduino Pro Mini [4] and Arduino Nano models.

  5. Susceptibility weighted imaging - Wikipedia

    en.wikipedia.org/wiki/Susceptibility_weighted...

    A conventional gradient echo T2*-weighted image (left, TE=20 ms) shows some low-signal foci associated with CAA. On the other hand, an SWI image (center, with a resolution of 0.5 mm x 0.5 mm x 2.0 mm, projected over 8mm) shows many more associated low-signal foci. Phase images were used to enhance the effect of the local hemosiderin build-up.

  6. Focus - Wikipedia

    en.wikipedia.org/wiki/Focus

    Focus (pl.: foci or focuses) may refer to: Arts ... Hyperfocus, an intense form of mental concentration on a subject, topic, or task; Strong focusing, ...

  7. Focal length - Wikipedia

    en.wikipedia.org/wiki/Focal_length

    The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror.. The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power.

  8. Federal Audit Clearinghouse - Wikipedia

    en.wikipedia.org/wiki/Federal_Audit_Clearinghouse

    The Data Collection Form (Form SF-SAC) is a worksheet which recipients must complete online and include with the Single Audit reporting packages sent to the FAC. [4] The worksheet is divided into three parts, and is an important tool for the FAC because it summarizes the entire Single Audit results of a recipient in a few pages, which allows for easier and faster sorting and categorizing.

  9. Fluorodeoxyglucose (18F) - Wikipedia

    en.wikipedia.org/wiki/Fluorodeoxyglucose_(18F)

    About 75% of the fluorine-18 activity remains in tissues and is eliminated with a half-life of 110 minutes, presumably [citation needed] by decaying in place to O-18 to form [18 O]O-glucose-6-phosphate, which is non-radioactive (this molecule can soon be metabolized to carbon dioxide and water, after nuclear transmutation of the fluorine to ...