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Phosphogypsum is a by-product from the production of phosphoric acid by treating phosphate ore with sulfuric acid according to the following reaction: . Ca 5 (PO 4) 3 X + 5 H 2 SO 4 + 10 H 2 O → 3 H 3 PO 4 + 5 (CaSO 4 · 2 H 2 O) + HX
A Portable People Meter worn by Nielsen Audio panelists to monitor media exposure The newer NPM-1 Portable People Meter (FCC ID 2ASUZ-NPM-1) installed in a wristband. Nielson Universal Meter Gateway UMG-2, which uses BLE to connect to the meters and uploads the collected data via LTE .
Many phosphor powders are produced in low-temperature processes, such as sol-gel, and usually require post-annealing at temperatures of ~1000 °C, which is undesirable for many applications. However, proper optimization of the growth process allows manufacturers to avoid the annealing.
Nielsen Media Research is a sister company to Nielsen NetRatings, which measures Internet and digital media audiences through a telephone and internet survey, and Nielsen BuzzMetrics, which measures Consumer-Generated Media. Nielsen also conducts market research for the film industry through National Research Group (NRG).
Phosphor thermometry is an optical method for surface temperature measurement. The method exploits luminescence emitted by phosphor material. Phosphors are fine white or pastel-colored inorganic powders which may be stimulated by any of a variety of means to luminesce, i.e. emit light.
Per Nielsen, the 2025 show hit a 1.8 rating among adults age 18-49, even with 2024. PREVIOUSLY: Airing on CBS for the second year in a row, the 82nd annual Golden Globes ceremony hit 10.1 million ...
The overall process of using a radioactive material to excite a phosphor and ultimately generate light is called radioluminescence. As tritium illumination requires no electrical energy, it has found wide use in applications such as emergency exit signs , illumination of wristwatches, and portable yet very reliable sources of low intensity ...
This list is intended to include links to all publicly available weekly lists of Nielsen ratings from 1950 through 1997. (Subsequent to 1997, there have been other archives created such as that at tvbythenumbers.zap2it.com and other sites, though archive.org may need to be used to access this information.