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As a result of the focussing, the detector view is actually a beam pattern. Under certain angles (zones), the PIR sensor receives almost no radiation energy and under other angles the PIR receives concentrated amounts of infrared energy. This separation helps the motion detector to discriminate between field-wide illumination and moving objects.
The unit is designed to record how many hours of bright sunshine were experienced on a given day. A Campbell–Stokes sunshine recorder. This basic unit is still in use today with very little change. It is widely used outside the United States (the Marvin sunshine recorder is generally the instrument used by the U.S. National Weather Service).
A Jordan sunshine recorder (left). The other instrument is a Marvin sunshine recorder. Older recorders required a human observer to interpret the results; recorded results might differ among observers. Modern sunshine recorders use electronics and computers for precise data that do not depend on a human interpreter.
Both teens were former students at the Sunshine Beach State High School, ABC reported. According to the network, at least five people had died at the same swimming spot since 2007.
Pets at Home was sold to Bridgepoint Capital for £230 million in July 2004. [6] In November 2007, the 200th store, Barnstaple, opened. [7] On 27 January 2010, Pets at Home was sold by Bridgepoint Capital to US-based investment firm Kohlberg Kravis Roberts (KKR) for around £955 million. [8] In March 2014, the company was the subject of an ...
S.I.D. (Space Intruder Detector), from UFO produced by Gerry Anderson (1969) Star Trek – was the first program to predict computers used extensively in everyday life, from large computers used to maintain the starship's varied systems to hand-held devices used for analysis. The show frequently dealt with the question of when a computer had ...
Image credits: Nature Photographer of the Year (NPOTY) 2024 #3 Category Mammals: Highly Commended, "Gone Fishing" By Hannes Lochner "A small-spotted genet visits a water pond for a sip and ...
A pyranometer (from Greek πῦρ (pyr) 'fire' and ἄνω (ano) 'above, sky') is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m 2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.