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A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. The images may represent electrical waveforms (oscilloscope), pictures, radar targets, or other phenomena. A CRT on a television set is commonly called a picture tube. CRTs have also been used as memory devices, in which case the screen is not intended to be visible to an observer. The term cathode ray was used to describe electron beams when they were first discovered, before it was understood that what was emitted from the cathode was a beam of electrons.
A gas mask is an item of personal protective equipment used to protect the wearer from inhaling airborne pollutants and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Most gas masks are also respirators, though the word gas mask is often used to refer to military equipment, the scope used in this article. The gas mask only protects the user from digesting, inhaling, and contact through the eyes. Most combined gas mask filters will last around 8 hours in a biological or chemical situation. Filters against specific chemical agents can last up to 20 hours.
Snorkeling is the practice of swimming on or through a body of water while equipped with a diving mask, a shaped breathing tube called a snorkel, and usually swimfins. In cooler waters, a wetsuit may also be worn. The use of this equipment allows the snorkeler to observe underwater attractions for extended periods with relatively little effort and to breathe while face-down at the surface.
The Legend of Zelda: Majora's Mask is a 2000 action-adventure game developed and published by Nintendo for the Nintendo 64. It was the second The Legend of Zelda game to use 3D graphics, following Ocarina of Time (1998). Designed by a creative team led by Eiji Aonuma, Yoshiaki Koizumi, and Shigeru Miyamoto, Majora's Mask was completed in less than two years. It featured enhanced graphics and several gameplay changes, but reused a number of elements and character models, which the game's creators called a creative decision made necessary by time constraints.
A mask is an object normally worn on the face, typically for protection, disguise, performance, or entertainment, and often employed for rituals and rites. Masks have been used since antiquity for both ceremonial and practical purposes, as well as in the performing arts and for entertainment. They are usually worn on the face, although they may also be positioned for effect elsewhere on the wearer's body.
A facial is a family of skin care treatments for the face, including steam, exfoliation, extraction, creams, lotions, facial masks, peels, and massage. They are normally performed in beauty salons, but are also a common spa treatment. They are used for general skin health as well as for specific skin conditions. Types of facials include European facial, LED light therapy facials, hydrafacials and mini-facials.
A surgical mask, also known by other names such as a medical face mask or procedure mask, is a personal protective equipment used by healthcare professionals that serves as a mechanical barrier that interferes with direct airflow in and out of respiratory orifices. This helps reduce airborne transmission of pathogens and other aerosolized contaminants between the wearer and nearby people via respiratory droplets ejected when sneezing, coughing, forceful expiration or unintentionally spitting when talking, etc. Surgical masks may be labeled as surgical, isolation, dental or medical procedure masks.
Troy James Hurtubise was a Canadian inventor and conservationist, noted for self-testing his often bizarre creations. These inventions included various ray generators, firepaste, the Ursus personal armour suit and the Trojan Ballistics Suit of Armor.
Lucha libre is the term for the style of professional wrestling originating in Mexico. Since its introduction to Mexico in the early 20th century, it has developed into a unique form of the genre, characterized by colorful masks, rapid sequences of holds and maneuvers, and "high-flying" maneuvers, some of which have been adopted in the United States, Japan, and elsewhere. The wearing of masks has developed special significance, and matches are sometimes contested in which the loser must permanently remove his mask, which is a wager with a high degree of weight attached. Tag team wrestling is especially prevalent in lucha libre, particularly matches with three-member teams, called trios.
Black Mask is a supervillain appearing in comic books published by DC Comics. Created by Doug Moench and Tom Mandrake, the character debuted in Batman #386. He is commonly depicted as a brutal and ruthless crime lord in Gotham City who has a fixation with masks and derives sadistic pleasure from the act of torture. Black Mask is one of the most enduring enemies of the superhero Batman and belongs to the collective of adversaries that make up his rogues gallery.
Firefly is a supervillain appearing in American comic books published by DC Comics. Created by France Herron and Dick Sprang, he made his debut in Detective Comics #184. Initially portrayed as a criminal who utilized lighting effects to commit robberies, Firefly was later reimagined as a sociopathic pyromaniac with an obsessive compulsion to start fires following Crisis on Infinite Earths' reboot of the DC Universe in the 1980s. This darker depiction of the character has since endured as one of the superhero Batman's most recurring enemies and belongs to the collective of adversaries that make up his central rogues gallery.
The False Face Society is a medicinal society in the Haudenosaunee, known especially for its wooden masks. Medicine societies are considered a vital part of the well-being of many Indigenous communities. The societies role within communities is to cure ailments through medical rituals, with the False Face Society having power over illness affecting teeth, ears, joints, illness causing inflammation, and nosebleeds. Membership to the society is acquired through being cured of an illness by the society, or experiencing a dream that one must become a member of the society. Members of the society were men, however the leader of the society was always a woman.
The Mask may refer to:
Anti-fog agents, also known as anti-fogging agents and treatments, are chemicals that prevent the condensation of water in the form of small droplets on a surface which resemble fog. Anti-fog treatments were first developed by NASA during Project Gemini, and are now often used on transparent glass or plastic surfaces used in optical applications, such as the lenses and mirrors found in glasses, goggles, camera lenses, and binoculars. The treatments work by minimizing surface tension, resulting in a non-scattering film of water instead of single droplets. This works by altering the degree of wetting. Anti-fog treatments usually work either by application of a surfactant film, or by creating a hydrophilic surface.
The Guy Fawkes mask is a stylised depiction of Guy Fawkes created by illustrator David Lloyd for the 1982–1989 graphic novel V for Vendetta. Inspired by the use of a mask representing Fawkes being burned on an effigy having long previously had roots as part of Guy Fawkes Night celebrations, Lloyd designed the mask as a smiling face with red cheeks, a wide moustache upturned at both ends, and a thin vertical pointed beard, worn in the graphic novel's narrative by anarchist protagonist V.
Methyldichloroarsine, sometimes abbreviated "MD" and also known as methyl Dick, is an organoarsenic compound with the formula CH3AsCl2. This colourless volatile liquid is a highly toxic vesicant that has been used in chemical warfare.
Digidentis is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the family Chromodorididae. This genus has become a synonym of Thorunna Bergh, 1878
Drafthouse Films is a film distribution company based in Austin, Texas which releases "provocative, visionary and artfully unusual films new and old from around the world". It was founded in 2010 by Tim League, who had previously founded the Alamo Drafthouse Cinema chain. Drafthouse Films has released a variety of films since its inception.
Beyond the Mask is a 2015 American Christian historical action-adventure film directed by Chad Burns and starring Andrew Cheney, John Rhys-Davies, and Kara Killmer. The film follows an ex-mercenary during the American Revolution who attempts to redeem himself from a life of murder by becoming a masked vigilante to overthrow the British in the colonies.
Respirator diplomacy of Taiwan refers to the exchange of masks between Taiwan and other countries, aimed to help the Global Coronavirus Response.
References
- ↑ "Face masks for burns". healthpartners.com.
- ↑ "Here's how the US Air Force invented the best fitting burn masks in the world". techlinkcenter.org.
- ↑ "Decades Later, Woman's Mask Still Helps Burn Victims". minnesota.cbslocal.com. March 12, 2012.
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