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  2. Single-photon avalanche diode - Wikipedia

    en.wikipedia.org/wiki/Single-photon_avalanche_diode

    Commercial single-photon avalanche diode module for optical photons. A single-photon avalanche diode (SPAD), also called Geiger-mode avalanche photodiode [1] (G-APD or GM-APD [2]) is a solid-state photodetector within the same family as photodiodes and avalanche photodiodes (APDs), while also being fundamentally linked with basic diode behaviours.

  3. Auditory processing disorder - Wikipedia

    en.wikipedia.org/wiki/Auditory_processing_disorder

    Auditory processing disorder (APD), rarely known as King-Kopetzky syndrome, is a neurodevelopmental disorder affecting the way the brain processes sounds. [2] Individuals with APD usually have normal structure and function of the ear, but cannot process the information they hear in the same way as others do, which leads to difficulties in recognizing and interpreting sounds, especially the ...

  4. What Is Auditory Processing Disorder (APD) And How to Treat It

    www.aol.com/lifestyle/auditory-processing...

    In this guide we explore the symptoms, causes and treatments of APD. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help ...

  5. Avalanche photodiode - Wikipedia

    en.wikipedia.org/wiki/Avalanche_photodiode

    APD applicability and usefulness depends on many parameters. Two of the larger factors are: quantum efficiency, which indicates how well incident optical photons are absorbed and then used to generate primary charge carriers; and total leakage current, which is the sum of the dark current, photocurrent and noise. Electronic dark-noise ...

  6. Autoimmune progesterone dermatitis - Wikipedia

    en.wikipedia.org/wiki/Autoimmune_progesterone...

    Autoimmune progesterone dermatitis (APD) occurs during the luteal phase of a woman's menstrual cycle and is an uncommon cyclic premenstrual reaction to progesterone. It can present itself in several ways, including eczema , erythema multiforme , urticaria , angioedema , and progesterone-induced anaphylaxis . [ 2 ]

  7. Air Products and Chemicals (APD) Upgraded to Buy: Here ... - AOL

    www.aol.com/news/air-products-chemicals-apd...

    Air Products and Chemicals (APD) has been upgraded to a Zacks Rank #2 (Buy), reflecting growing optimism about the company's earnings prospects. This might drive the stock higher in the near term.

  8. Silicon photomultiplier - Wikipedia

    en.wikipedia.org/wiki/Silicon_photomultiplier

    The supply voltage (V b) depends on the APD technology used and typically varies between 20 V and 100 V, thus being from 15 to 75 times lower than the voltage required for traditional photomultiplier tube (PMT) operation.

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