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  2. Particle image velocimetry - Wikipedia

    en.wikipedia.org/wiki/Particle_image_velocimetry

    Particle image velocimetry (PIV) is a non-intrusive optical flow measurement technique used to study fluid flow patterns and velocities. PIV has found widespread applications in various fields of science and engineering, including aerodynamics, combustion, oceanography, and biofluids. The development of PIV can be traced back to the early 20th ...

  3. Pivalic acid - Wikipedia

    en.wikipedia.org/wiki/Pivalic_acid

    Pivalic acid is a carboxylic acid with a molecular formula of (CH 3) 3 CCO 2 H. This colourless, odiferous organic compound is solid at room temperature. Two abbreviations for pivalic acid are t -BuC (O)OH and PivOH. The pivalyl or pivaloyl group is abbreviated t -BuC (O). Pivalic acid is an isomer of valeric acid, the other two isomers of it ...

  4. FIPS 201 - Wikipedia

    en.wikipedia.org/wiki/FIPS_201

    FIPS 201 (Federal Information Processing Standard Publication 201) is a United States federal government standard that specifies Personal Identity Verification (PIV) requirements for Federal employees and contractors. In response to HSPD-12, the NIST Computer Security Division initiated a new program for improving the identification and ...

  5. Stokes number - Wikipedia

    en.wikipedia.org/wiki/Stokes_number

    The Stokes number is defined as the ratio of the characteristic time of a particle (or droplet) to a characteristic time of the flow or of an obstacle, or. where is the relaxation time of the particle (the time constant in the exponential decay of the particle velocity due to drag), is the fluid velocity of the flow well away from the obstacle ...

  6. Cervical Cap vs. Diaphragm: Which Is Best for You? - Healthline

    www.healthline.com/health/birth-control/cervical...

    Diaphragms must be removed within 24 hours. Both cervical caps and diaphragms are free for most people who have health insurance. If you don’t have insurance, you may pay around $100 for a ...

  7. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    39 – Remote-cutoff pentode, UX5 based (Commonly branded as 39/44). 41 – Power pentode, Early UX6 based version of octal type 6K6G, and Loctal type 7B5. 42 – Power pentode, Early UX6 based version of octal type 6F6G, Except for heater, similar to types 2A5 and 18. 44 – Similar to type 39, see type 39 above.

  8. Cat FIP (Feline Infectious Peritonitis): Symptoms, Causes ...

    www.webmd.com/pets/cats/cat-fip-feline...

    This infection can affect the brain, liver, kidneys, lungs, and skin. This form often causes the cat to have seizures and move in an abnormal or uncoordinated way. In some cases, cats will also ...

  9. How to Have PIV — or Toy in V — Sex When You Have an IUD

    www.healthline.com/health/health-sex/sex-with-iud

    First, you might have some spotting and cramping for a bit after the IUD is inserted. So, you might not feel up to sex right away. It’s probably a good idea to set expectations with your partner ...