Phased array ultrasonics (PA) is an advanced method of ultrasonic testing that has applications in medical imaging and industrial nondestructive testing. Common applications are to noninvasively examine the heart or to find flaws in manufactured materials such as welds. Single-element probes, known technically as monolithic probes, emit a beam in a fixed direction. To test or interrogate a large volume of material, a conventional probe must be physically scanned to sweep the beam through the area of interest. In contrast, the beam from a phased array probe can be focused and swept electronically without moving the probe. The beam is controllable because a phased array probe is made up of multiple small elements, each of which can be pulsed individually at a computer-calculated timing. The term phased refers to the timing, and the term array refers to the multiple elements. Phased array ultrasonic testing is based on principles of wave physics, which also have applications in fields such as optics and electromagnetic antennae.
"}{"slip": { "id": 120, "advice": "A nod is as good as a wink to a blind horse."}}
{"slip": { "id": 50, "advice": "Walking is a perfectly valid solution to traffic congestion problems."}}
{"type":"standard","title":"Chris Grayling","displaytitle":"Chris Grayling","namespace":{"id":0,"text":""},"wikibase_item":"Q337453","titles":{"canonical":"Chris_Grayling","normalized":"Chris Grayling","display":"Chris Grayling"},"pageid":427337,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Official_portrait_of_Rt_Hon_Chris_Grayling_MP_crop_2.jpg/330px-Official_portrait_of_Rt_Hon_Chris_Grayling_MP_crop_2.jpg","width":320,"height":427},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/7/73/Official_portrait_of_Rt_Hon_Chris_Grayling_MP_crop_2.jpg","width":1500,"height":2000},"lang":"en","dir":"ltr","revision":"1283539755","tid":"f4bc8727-0f77-11f0-bf40-883c3c9f1456","timestamp":"2025-04-02T04:07:13Z","description":"British politician (born 1962)","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Chris_Grayling","revisions":"https://en.wikipedia.org/wiki/Chris_Grayling?action=history","edit":"https://en.wikipedia.org/wiki/Chris_Grayling?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Chris_Grayling"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Chris_Grayling","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Chris_Grayling","edit":"https://en.m.wikipedia.org/wiki/Chris_Grayling?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Chris_Grayling"}},"extract":"Christopher Stephen Grayling, Baron Grayling,, is a British politician and author who served as Secretary of State for Justice from 2012 to 2015, Leader of the House of Commons from 2015 to 2016 and Secretary of State for Transport from 2016 until 2019. A member of the Conservative Party, he served as Member of Parliament (MP) for Epsom and Ewell from 2001 to 2024. Before entering politics, Grayling worked in the television and film industry.","extract_html":"
Christopher Stephen Grayling, Baron Grayling,, is a British politician and author who served as Secretary of State for Justice from 2012 to 2015, Leader of the House of Commons from 2015 to 2016 and Secretary of State for Transport from 2016 until 2019. A member of the Conservative Party, he served as Member of Parliament (MP) for Epsom and Ewell from 2001 to 2024. Before entering politics, Grayling worked in the television and film industry.
"}{"type":"standard","title":"Alternanthera galapagensis","displaytitle":"Alternanthera galapagensis","namespace":{"id":0,"text":""},"wikibase_item":"Q388034","titles":{"canonical":"Alternanthera_galapagensis","normalized":"Alternanthera galapagensis","display":"Alternanthera galapagensis"},"pageid":12854732,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Amaranthus_sclerantoides%2C_Alternanthera_galapagensis.jpg/330px-Amaranthus_sclerantoides%2C_Alternanthera_galapagensis.jpg","width":320,"height":443},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/5/5e/Amaranthus_sclerantoides%2C_Alternanthera_galapagensis.jpg","width":2202,"height":3047},"lang":"en","dir":"ltr","revision":"1273572953","tid":"e5ae8d45-e1c5-11ef-adb9-eb1e501ac7ff","timestamp":"2025-02-03T00:29:15Z","description":"Species of flowering plant","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Alternanthera_galapagensis","revisions":"https://en.wikipedia.org/wiki/Alternanthera_galapagensis?action=history","edit":"https://en.wikipedia.org/wiki/Alternanthera_galapagensis?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Alternanthera_galapagensis"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Alternanthera_galapagensis","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Alternanthera_galapagensis","edit":"https://en.m.wikipedia.org/wiki/Alternanthera_galapagensis?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Alternanthera_galapagensis"}},"extract":"Alternanthera galapagensis is a species of plant in the family Amaranthaceae. It is endemic to the Galapagos.","extract_html":"
Alternanthera galapagensis is a species of plant in the family Amaranthaceae. It is endemic to the Galapagos.
"}