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Muon tomography or muography is a technique that uses cosmic ray muons to generate two or three-dimensional images of volumes using information contained in the Coulomb scattering of the muons.
On April 28, 2021, Google announced the rollout of the alert system to Greece and New Zealand, the first countries to receive alerts based on Google's own detection capabilities. [44] Google's alerts were extended to Turkey , the Philippines , Kazakhstan , Kyrgyz Republic , Tajikistan , Turkmenistan and Uzbekistan in June 2021. [ 45 ]
On 6 September 2021, Times Now was criticised for a report using video that suggested a Pakistan Air Force jet was hovering over Afghanistan's Panjshir Valley. The video was soon revealed to be a United States Air Force F-15 jet filmed by a YouTube airplane enthusiast in Wales filming the jet within the Mach Loop three months before. [29]
The frequency of radio waves used by most radars, in the form of microwaves, propagate in straight lines.This generally limits the detection range of radar systems to objects on their horizon (generally referred to as "line of sight" since the aircraft must be at least theoretically visible to a person at the location and elevation of the radar transmitter) due to the curvature of the Earth.
Horizon scanning (HS) or horizon scan is a method from futures studies, sometimes regarded as a part of foresight. [1] It is the early detection and assessment of emerging technologies or threats for mainly policy makers in a domain of choice.
Direct observation of gravitational waves, which commenced with the detection of an event by LIGO in 2015, [1] plays a key role in gravitational wave astronomy.LIGO has been involved in all subsequent detections to date, with Virgo joining in August 2017.
to confront the global climate emergency. ... Today's interim report from the UNFCCC [1] shows governments are nowhere close to the level of ambition needed to limit climate change to 1.5 degrees and meet the goals of the Paris Agreement. The major emitters must step up with much more ambitious emissions reductions targets for 2030 in their Nationally Deter
A time-of-flight (TOF) detector is a particle detector which can discriminate between a lighter and a heavier elementary particle of same momentum using their time of flight between two scintillators [1]. The first of the scintillators activates a clock upon being hit while the other stops the clock upon being hit.