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Augmented Reality
Augmented reality (AR), also known as mixed reality (MR), is a technology that overlays real-time 3D computer graphics, 3D-rendered computer graphics onto a portion of the real world through a display, such as a handheld device or head-mounted display. This experience is seamlessly interwoven with the physical world such that it is perceived as an immersion (virtual reality), immersive aspect of the real environment. In this way, augmented reality alters one's ongoing perception of a real-world environment, compared to virtual reality, which aims to completely replace the user's real-world environment with a simulated one. Augmented reality is typically visual, but can span multiple sensory Modality (human–computer interaction), modalities, including Hearing, auditory, haptic perception, haptic, and Somatosensory system, somatosensory. The primary value of augmented reality is the manner in which components of a digital world blend into a person's perception of the real world, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autoregressive Model
In statistics, econometrics, and signal processing, an autoregressive (AR) model is a representation of a type of random process; as such, it can be used to describe certain time-varying processes in nature, economics, behavior, etc. The autoregressive model specifies that the output variable depends linearly on its own previous values and on a stochastic term (an imperfectly predictable term); thus the model is in the form of a stochastic difference equation (or recurrence relation) which should not be confused with a differential equation. Together with the moving-average (MA) model, it is a special case and key component of the more general autoregressive–moving-average (ARMA) and autoregressive integrated moving average (ARIMA) models of time series, which have a more complicated stochastic structure; it is also a special case of the vector autoregressive model (VAR), which consists of a system of more than one interlocking stochastic difference equation in more than one e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toyota AR Engine
The AR engine family is an Inline-4 piston engine series by Toyota, first introduced in 2008 for the RAV4, and subsequently for the Highlander, Venza, Camry and Scion tC. The AR series uses a die-cast aluminium engine block and aluminium DOHC cylinder head. The engine series shares many of the technologies in the AZ engine, while incorporating features such as variable valve timing on both intake and exhaust camshafts or dual VVT-i, low friction technologies including an offset crankshaft, roller rockers for the valvetrain, a three-stage variable oil pump, reduced-tension piston rings and auxiliary belt drive. An Acoustic Control Induction System switches the length of the intake tract in two stages, based on rpm and throttle angle, thereby ensuring strong torque across a broad engine speed range. New tumble control valves enhances combustion while the engine is cold, and helps to bring the catalytic converters up to working temperature quickly. The Tumble control valve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Androgen Receptor
The androgen receptor (AR), also known as NR3C4 (nuclear receptor subfamily 3, group C, member 4), is a type of nuclear receptor that is activated by binding any of the androgenic hormones, including testosterone and dihydrotestosterone, in the cytoplasm and then translocating into the Cell nucleus, nucleus. The androgen receptor is most closely related to the progesterone receptor, and progestins in higher dosages can block the androgen receptor. The main function of the androgen receptor is as a DNA-binding protein, DNA-binding transcription factor that Gene expression regulation, regulates gene expression; however, the androgen receptor has other functions as well. Androgen-regulated genes are critical for the development and maintenance of the male sexual phenotype. Function Effect on development In some cell types, testosterone interacts directly with androgen receptors, whereas, in others, testosterone is converted by 5-alpha reductase, 5-alpha-reductase to dihydrot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Research
Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX. Acoustic Research was known for the AR-3 series of speaker systems, which used the acoustic suspension woofer of the AR-1 with newly designed dome mid-range speaker and high-frequency Loudspeaker#Driver design: dynamic loudspeakers, drivers. AR's line of acoustic suspension speakers were the first loudspeakers with relatively flat response, extended bass (sound), bass, wide Acoustic dispersion, dispersion, small size, and reasonable cost. The AR Turntable remains a highly sought vinyl record player. Company history Acoustic Research, Inc. ("AR") was founded in 1954 by Sound recording and reproduction, audio pioneer, writer, inventor, researcher and audio-electronics teacher Edgar Villchur and his student, Henry Kloss. AR was established to produce the United States dollar, US$185 () model AR-1, a loudspeaker design incorporating the acoust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerolíneas Argentinas
Aerolíneas Argentinas, formally ''Aerolíneas Argentinas S.A.'', is the state-owned flag carrier of Argentina and the country's largest airline. The airline was created in 1949, from the merger of Aeroposta Argentina (AA), Aviación del Litoral Fluvial Argentino (ALFA), Flota Aérea Mercante Argentina (FAMA), and Zonas Oeste y Norte de Aerolíneas Argentinas (ZONDA), and started operations in December 1950. A consortium led by Iberia took control of the airline in 1990, and Grupo Marsans acquired the company and its subsidiaries in 2001, following a period of severe financial difficulties that put the airline on the brink of closure. The airline was renationalized in late 2008. It has its headquarters in Buenos Aires. The airline joined the SkyTeam alliance in August 2012; the airline's cargo division became a member of SkyTeam Cargo in November 2013. Aerolíneas Argentinas and its former sister company Austral Líneas Aéreas operate from two hubs, both located in Buenos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AR (EP)
''AR'' is the debut extended play by American singer Addison Rae. It was released on August 18, 2023, through Sandlot Records. ''AR'' is a pop and Bubblegum music, bubblegum pop record with influences of electropop, synth-pop and dance-pop, which ''Rolling Stone'' described as "plasticky, pristine pop that online audiences ironically, and then unironically, eat up." It consists of four songs, while Rae's debut single "Obsessed (Addison Rae song), Obsessed" appears as a bonus track on Spotify. The EP was met with positive reviews for its earworms, catchy hooks, and Rae's ability to channel the nostalgia of the 2000s and 2010s pop era. On Spotify, the project was ranked among the top 10 biggest opening weeks for a female EP in Spotify history with 6.6 million streams. The EP also debuted at number 19 on the US ''Billboard charts, Billboard'' Heatseekers charts, Heatseekers Albums chart. Background In March 2021, Rae released her debut single "Obsessed (Addison Rae song), Obsessed". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-reflective
An antireflective, antiglare or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses, other optical elements, and photovoltaic cells to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost due to reflection. In complex systems such as cameras, binoculars, telescopes, and microscopes the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight. Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfa Romeo
Alfa Romeo Automobiles S.p.A. () is an Italian carmaker known for its sports-oriented vehicles, strong auto racing heritage, and iconic design. Headquartered in Turin, Italy, it is a subsidiary of Stellantis Europe and one of 14 brands of multinational automotive company Stellantis. Founded on 24 June 1910 in Milan, Italy as A.L.F.A.—an acronym for ''Anonima Lombarda Fabbrica Automobili''—the company was established by Cavaliere Ugo Stella to acquire the assets of the ailing Italian subsidiary of French carmaker Darracq, of which he had been an investor and manager. Its first car was the 24 HP, designed by Giuseppe Merosi, which became commercially successful and participated in the 1911 Targa Florio endurance race. In August 1915, ALFA was acquired by Neapolitan entrepreneur and engineer Nicola Romeo, who vastly expanded the company's portfolio to include heavy machinery and aircraft engines. In 1920, the company's name was changed to Alfa Romeo, with the Torpedo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aortic Regurgitation
Aortic regurgitation (AR), also known as aortic insufficiency (AI), is the leaking of the aortic valve of the heart that causes blood to flow in the reverse direction during ventricular diastole, from the aorta into the left ventricle. As a consequence, the cardiac muscle is forced to work harder than normal. Signs and symptoms Symptoms of aortic regurgitation are similar to those of heart failure and include the following: * Dyspnea on exertion * Orthopnea * Paroxysmal nocturnal dyspnea * Palpitations * Angina pectoris * Cyanosis (in acute cases) Causes In terms of the cause of aortic regurgitation, is often due to the aortic root dilation ('' annuloaortic ectasia''), which is idiopathic in over 80% of cases, but otherwise may result from aging, syphilitic aortitis, osteogenesis imperfecta, aortic dissection, Behçet's disease, reactive arthritis and systemic hypertension.Chapter 1: Diseases of the Cardiovascular system > Section: Valvular Heart Disease in: Aortic root ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Adelaide Review
''The Adelaide Review'' (AR) was a monthly print arts magazine and dynamic website in Adelaide, South Australia. It was first published in 1984, but gained standing after one of its writers, Christopher Pearson, took it over in 1985. In March 2019, it was one of only two "broad-spectrum non- Murdoch print media" publications in Adelaide, the other one being '' SA Life''. Its 488th and final issue was published in print and online on 1 October 2020. History ''The Adelaide Review'' existed in a number of forms since 1984, as both a magazine and a newspaper.''Advertising in The Adelaide Review'' , August 2004, The Adelaide Review Archives. Retrieved 2 Aug 2010. The first edition came out in March 1984. Christopher Pearson bought the rights to ''The Adelaide Preview'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accelerated Reader
Accelerated Reader (AR) is an educational program created by Renaissance Learning. It is designed to monitor and manage students' independent reading practice and comprehension in both English and Spanish. The program assesses students' performance through quizzes and tests based on the books they have read. As the students read and take quizzes, they are awarded points. AR monitors students' progress and establishes personalised reading goals according to their reading levels. Components ATOS ATOS is a readability formula designed by Renaissance Learning. Books with quizzes in Accelerated Reader are assigned an ATOS readability level. This ATOS score is used by AR in combination with a book length to assign a point value to each book. It can also be used by students to help choose books of appropriate reading levels. Quiz Accelerated (going up to 7th grade) Reader (AR) quizzes are available on fiction and non-fiction books, textbooks, supplemental materials, and magazine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
