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HandWiki is the world's largest wiki-style encyclopedia dedicated to science, technology and computing. It allows you to create and edit articles as long as you have external citations and login account. In addition, this is a content management environment that can be used for collaborative editing of original scholarly content, such as books, manuals, monographs and tutorials.

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Bauxite Tailings
Bauxite tailings, also known as bauxite residue, red mud, red sludge, or alumina refinery residues (ARR), is a highly alkaline waste product composed mainly of iron oxide that is generated in the industrial production of alumina (aluminium oxide, the principal raw material used in the manufacture of aluminium metal and also widely used in the manufacture of ceramics, abrasives and refractories). It is important to differentiate between the alkaline waste generated in the Bayer process and the tailings generated during the mining of bauxite. This article specifically covers the alkaline waste generated when operating the Bayer process. The scale of production makes the waste product an important one, and issues with its storage are reviewed and every opportunity is explored to find uses for it. Over 95% of the alumina produced globally is through the Bayer process; for every tonne of alumina produced, approximately 1 to 1.5 tonnes of bauxite tailings/residue are also produced. Annual production of alumina in 2018 was approximately 126 million tonnes resulting in the generation of over 160 million tonnes of bauxite tailings/residue.
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  • 02 Nov 2022
Topic Review
H-500 Holon
The H-500 project is an outline planning scheme in accordance with the Planning and Building Law for South Holon, Israel. The area of the project is approximately 4,080 dunams and it is the largest, undeveloped land reserve remaining in Holon. The scheme is bounded in the north by Sderot Yerushalayim and the Kiryat Sharet and Kiryat Pinhas Ayalon neighbourhoods, in the east by Highway no. 4, in the south by the border with the city of Rishon LeZion and in the west by Highway 20 (Israel) (the Ayalon Highway).
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  • 02 Nov 2022
Topic Review
Charlotte's Web (Cannabis)
Charlotte's Web is a high-cannabidiol (CBD), low-tetrahydrocannabinol (THC) Cannabis strain marketed as a dietary supplement under federal law of the United States. It is produced by the Stanley brothers in Colorado. It does not induce the psychoactive "high" typically associated with recreational marijuana strains that are high in THC. In September 2014, the Stanleys announced that they would ensure that the product consistently contained less than 0.3% THC. Charlotte's Web is named after Charlotte Figi, born (2006-10-18) October 18, 2006 (age 16), whose story has led to her being described as "the girl who is changing medical marijuana laws across America." Her parents and physicians say she experienced a reduction of her epileptic seizures brought on by Dravet syndrome after her first dose of medical marijuana at five years of age. Her usage of Charlotte's Web was first featured in the 2013 CNN documentary "Weed". Media coverage increased demand for Charlotte's Web and similar products high in CBD, which has been used to treat epilepsy in toddlers and children. It was originally called "Hippie's Disappointment" as it was a strain that had high CBD and could not induce a "high". While anecdotal reports have sparked interest in treatment with cannabinoids, there is not enough evidence to draw conclusions with certainty about their safety or efficacy. Physicians worry that some parents are willing to try treatments before proper research has been conducted, and that they may be disappointed. They are "alarmed by parallels to past miracle-cure manias later proved false..." and "...wary of the heightened placebo effect in treatments involving children, when reports of progress depend on the view of parents."
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  • 02 Nov 2022
Topic Review
Sirente Crater
The Sirente crater (Italian: Cratere del Sirente) is a small shallow seasonal lake in Abruzzo, central Italy. The depression, which is located at the center of the Prati del Sirente, a mountainous highland north of the Sirente massif in the Apennines, is 13 km (8.1 mi) from the village of Secinaro. Its formation has prompted a number of theories in recent years. Although in the absence of shock-metamorphic and / or geochemical evidence it is not yet possible to confirm the meteoritic impact theory, no other theories for the origin of this geological structure have been proven yet. Interest in the Sirente crater began in the late 1990s after Swedish geologist Jens Ormö, an impact crater specialist, noticed ridges near the site that indicated a bolide collision. A research team named "The Sirente Crater Group" along with two scientists from the International Research School of Planetary Science of Pescara (IRSPS) began a detailed examination of the area. The team concluded the meteorite struck the Earth with the force of a small nuclear bomb; approximately one kiloton in yield. The blast would have created a mushroom cloud and shockwaves similar to a nuclear explosion.
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  • 02 Nov 2022
Topic Review
Droid Fonts
Droid is a font family first released in 2007 and created by Ascender Corporation for use by the Open Handset Alliance platform Android and licensed under the Apache License. The fonts are intended for use on the small screens of mobile handsets and were designed by Steve Matteson of Ascender Corporation. The name was derived from the Open Handset Alliance platform named Android.
  • 2.0K
  • 02 Nov 2022
Topic Review
MOST (Satellite)
The Microvariability and Oscillations of Stars telescope, better known simply as MOST, was Canada 's first space telescope. Up until nearly 10 years after its launch it was also the smallest space telescope in orbit (for which its creators nicknamed it the "Humble Space Telescope", in reference to one of the largest, the Hubble). MOST was the first spacecraft dedicated to the study of asteroseismology, subsequently followed by the now-completed CoRoT and Kepler missions. It was also the first Canadian science satellite launched since ISIS II, 32 years previously.
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  • 02 Nov 2022
Topic Review
Australian Archaeology
Australian archaeology is a large sub-field in the discipline of archaeology. Archaeology in Australia takes three main forms, Aboriginal archaeology (the archaeology of Aboriginal and Torres Strait Islander people in Australia before and after European settlement), historical archaeology (the archaeology of Australia after European settlement) and maritime archaeology. Bridging these sub-disciplines is the important concept of cultural heritage management which encompasses Aboriginal and Torres Strait Islander sites, historical sites and maritime sites.
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  • 02 Nov 2022
Topic Review
Primary Hypertrophic Osteoathropathy
Pachydermoperiostosis (PDP) or primary hypertrophic osteoarthropathy (PHO) is a rare genetic disorder that affects both bones and skin. Other names are idiopathic hypertrophic osteoarthropathy or Touraine-Solente-Golé syndrome. It is mainly characterized by pachydermia (thickening of the skin), periostosis (excessive bone formation) and finger clubbing (swelling of tissue with loss of normal angle between nail and nail bed). This disease affects relatively more men than women. After onset, the disease stabilizes after about 5–20 years. Life of PDP patients can be severely impaired. Currently, symptomatic treatments are NSAIDs and steroids or surgical procedures. In 1868, PDP was first described by Friedreich as ‘excessive growth of bone of the entire skeleton’. Touraine, Solente and Golé described PDP as the primary form of bone disease hypertrophic osteoarthropathy in 1935 and distinguished its three known forms.
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  • 03 Nov 2022
Topic Review
Outline of Biophysics
The following outline is provided as an overview of and topical guide to biophysics: Biophysics – interdisciplinary science that uses the methods of physics to study biological systems.
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  • 02 Nov 2022
Topic Review
Blackbird
Blackbird (formerly named FORscene) is an integrated internet video platform, video editing software, covering non-linear editing and publishing for broadcast, web and mobile. Designed by Blackbird plc to allow collaborative editing of video at resolutions of up to 540p and up to 60 frames per second on bandwidths as low as 2MBit/s, it is capable of video logging, reviewing, publishing and hosting through HD and 4K to UHD quality from original sources. The system is implemented as a mobile app for Android and iOS devices, a Java applet and a pure JavaScript web application as part of its user interface. The latter runs on platforms without application installation, codec installation, or machine configuration and has Web 2.0 features. Blackbird won the Royal Television Society's award for Technology in the post-production process in December 2005.
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  • 02 Nov 2022
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