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The Philadelphia Police Department (PPD, Philly PD, or Philly Police) is the police agency responsible for law enforcement and investigations within the County and City of Philadelphia. The PPD is one of the oldest municipal police agencies, [3] fourth-largest police force [4] and sixth-largest non-federal law enforcement agency in the United ...
PPD was founded by Fred Eshelman, Pharm.D., as a one-person consulting firm in 1985. The following year, he expanded the company's scope to include development services and relocated operations from Maryland to North Carolina.
Combined with Moore's law, performance per watt would grow at roughly the same rate as transistor density, doubling every 1–2 years. According to Dennard scaling transistor dimensions would be scaled by 30% (0.7×) every technology generation, thus reducing their area by 50%.
PPD test, Purified Protein Derivative test or Mantoux test, a screening test for tuberculosis Postpartum depression , a mental disorder affecting parents within the first year of their child's birth Pour point depressant , a chemical added to crude oil to lower its "pour point"
p-Phenylenediamine (PPD) is an organic compound with the formula C 6 H 4 (NH 2) 2. This derivative of aniline is a white solid, but samples can darken due to air oxidation. [1] It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for ...
Children less than four years of age, or children and adolescents exposed to adults in high-risk categories; 15 mm or more is positive in Persons with no known risk factors for TB [13] A tuberculin test conversion is defined as an increase of 10 mm or more within a two-year period, regardless of age.
In fractions like "2 nanometers per meter" (2 n m / m = 2 nano = 2×10 −9 = 2 ppb = 2 × 0.000 000 001), so the quotients are pure-number coefficients with positive values less than or equal to 1. When parts-per notations, including the percent symbol (%), are used in regular prose (as opposed to mathematical expressions), they are still pure ...
Number of pack-years = (packs smoked per day) × (years as a smoker) or. Number of pack-years = (number of cigarettes smoked per day/20) × number of years smoked. (1 pack has 20 cigarettes in some countries) Note that despite the unit being called a "pack-year," the actual unit is simply a number of packs (as noted above).