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A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.
Dybowski's twinspot (Euschistospiza dybowskii) is a common species of estrildid finch found in Africa. It has an estimated global extent of occurrence of 450,000 km 2.. It is found in Cameroon, Central African Republic, Chad, The Democratic Republic of the Congo, Côte d'Ivoire, Guinea, Liberia, Nigeria, Senegal, Sierra Leone, South Sudan and Uganda.
The Zambezi indigobird (Vidua codringtoni), also known as the twinspot indigobird or green indigobird, is a species of bird in the family Viduidae. It is found in Malawi , Tanzania , Zambia , and Zimbabwe .
Airborne zinc whiskers have been responsible for increased system failure rates in computer server rooms. Zinc whiskers grow from galvanized (electroplated) metal surfaces at a rate of up to a millimeter per year with a diameter of a few micrometers. Whiskers can form on the underside of zinc electroplated floor tiles on raised floors.
Zinc selenide is the inorganic compound with the formula ZnSe. It is a lemon-yellow solid although most samples have a duller color due to the effects of oxidation. It is an intrinsic semiconductor with a band gap of about 2.70 eV at 25 °C (77 °F), equivalent to a wavelength of 459 nm.
The genus Hypargos was introduced in 1862 by the German naturalist Ludwig Reichenbach to accommodate the pink-throated twinspot. [1] [2] The name combines the Ancient Greek hypo meaning "beneath" with Argos from Argus Panoptes, the many-eyed giant in Greek mythology. [3]
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