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  2. Kelvin probe force microscope - Wikipedia

    en.wikipedia.org/wiki/Kelvin_probe_force_microscope

    Furthermore, reducing the SKP probe to sample distance increases the intensity of the measurement, where the intensity of the measurement is proportional to 1/d 2, where d is the probe to sample distance. [19] The effects of changing probe to sample distance on the measurement can be counteracted by using SKP in constant distance mode.

  3. Infrared Data Association - Wikipedia

    en.wikipedia.org/wiki/Infrared_Data_Association

    The mandatory IrPHY (Infrared Physical Layer Specification) is the physical layer of the IrDA specifications. It comprises optical link definitions, modulation, coding, cyclic redundancy check (CRC) and the framer. Different data rates use different modulation/coding schemes:

  4. Physical Science Study Committee - Wikipedia

    en.wikipedia.org/wiki/Physical_Science_Study...

    The Physical Science Study Committee (PSSC) was inaugurated at a 1956 conference at MIT to review introductory physics education and to design, implement, and monitor improvements. It produced major new physics textbooks, instructional movies, and classroom laboratory materials, which were used by high schools around the world during the 1960s ...

  5. Pulsed plasma thruster - Wikipedia

    en.wikipedia.org/wiki/Pulsed_plasma_thruster

    A pulsed plasma thruster (PPT), also known as a Pulsed Plasma Rocket (PPR), or as a plasma jet engine (PJE), is a form of electric spacecraft propulsion. [1] PPTs are generally considered the simplest form of electric spacecraft propulsion and were the first form of electric propulsion to be flown in space, having flown on two Soviet probes ...

  6. Branches of science - Wikipedia

    en.wikipedia.org/wiki/Branches_of_science

    Natural science can be divided into two main branches: physical science and life science (or biology). Social sciences: the study of human behavior in its social and cultural aspects. [1] Scientific knowledge must be grounded in observable phenomena and must be capable of being verified by other researchers working under the same conditions. [2]

  7. Diffuse reflectance spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Diffuse_reflectance...

    The decadic absorbance of a scattering sample is defined as −log 10 (R+T) or −log 10 (1−A). For a non scattering sample, R = 0, and the expression becomes −log 10 T or log(⁠ 1 / T ⁠), which is more familiar. In a non-scattering sample, the absorbance has the property that the numerical value is proportional to sample thickness.

  8. Representative elementary volume - Wikipedia

    en.wikipedia.org/wiki/Representative_elementary...

    Schematic illustration of idealized fiber arrays and their corresponding unit cells. In the theory of composite materials, the representative elementary volume (REV) (also called the representative volume element (RVE) or the unit cell) is the smallest volume over which a measurement can be made that will yield a value representative of the whole. [1]

  9. Electrophysiology - Wikipedia

    en.wikipedia.org/wiki/Electrophysiology

    Electrophysiology (from Greek ἥλεκτ, ēlektron, "amber" [see the etymology of "electron"]; φύσις, physis, "nature, origin"; and -λογία, -logia) is the branch of physiology that studies the electrical properties of biological cells and tissues.

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