Science, Technology and Engineering
- Half Rate (HR or GSM-HR), a speech coding system for GSM developed in the early 1990s
- Hayati-Roberts link frame convention (HR), a coordinate representation for a robotic device
- Hazard ratio, the effect of an explanatory variable on the hazard or risk of an event
- Heart rate (HR), a measure of the number of heart beats per minute (bpm)
- Hertzsprung–Russell diagram (H-R diagram or HRD, also known as a colour-magnitude diagram or CMD), used in understanding stellar evolution in astronomy and astrophysics
- High-Resolution High-Definition (HRHD, HR, HRHDTV or HR.HDTV), referring to an image resolution derived from high-definition video
- Homologous recombination, in genetics, the process in which genetic material is exchanged between two similar or identical strands of DNA
- hour (hr, although h is more common and the only recognized SI symbol)
- HR (gene) (Hairless homolog (mouse)), a gene which encodes a protein whose function has been linked to hair growth
- HR (software), a program that automatically forms mathematical theories by searching for sequences of numbers
- Hypersensitive response, a mechanism used by plants to prevent the spread of infection by microbial pathogens
- HR, a star catalogue symbol standing for Harvard observatory, Revised photometry
Read more about this topic: HR
Famous quotes containing the words technology and/or engineering:
“Our technology forces us to live mythically, but we continue to think fragmentarily, and on single, separate planes.”
—Marshall McLuhan (1911–1980)
“Mining today is an affair of mathematics, of finance, of the latest in engineering skill. Cautious men behind polished desks in San Francisco figure out in advance the amount of metal to a cubic yard, the number of yards washed a day, the cost of each operation. They have no need of grubstakes.”
—Merle Colby, U.S. public relief program (1935-1943)