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Topic Review
List of Nuclear Reactors
This is a list of all the commercial nuclear reactors in the world, sorted by country, with operational status. The list only includes civilian nuclear power reactors used to generate electricity for a power grid. All commercial nuclear reactors use nuclear fission. As of April 2020, there are 440 operable power reactors in the world, with a combined electrical capacity of 390 GW. Additionally, there are 55 reactors under construction and 109 reactors planned, with a combined capacity of 63 GW and 118 GW, respectively. 329 more reactors are proposed. For non-power reactors, see List of nuclear research reactors. Where not otherwise specified, all information is sourced from the Power Reactor Information System (PRIS) of the International Atomic Energy Agency (IAEA).
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Topic Review
BMW X5 (E70)
The BMW E70 is the second-generation BMW X5 mid-size luxury crossover SUV. It replaced the BMW X5 (E53) in July 2006. It was manufactured alongside the BMW X6 at BMW's Greer, South Carolina plant in the U.S. and BMW's facility in Toluca, Mexico.
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Topic Review
Location-Based Recommendation
Location-based recommendation is a recommender system that incorporates location information, such as that from a mobile device, into algorithms to attempt to provide more-relevant recommendations to users. This could include recommendations for restaurants, museums, or other points of interest or events near the user's location. These services take advantage of the increasing use of smartphones that store and provide the location information of their users alongside location-based social networks (LBSN), like Foursquare, Gowalla, Swarm, and Yelp. In addition to geosocial networking services, traditional online social networks such as Facebook and Twitter are using the location information of their users to show and recommend upcoming events, posts, and local trends. In addition to its value for users, this information is valuable for third-party companies to advertise products, hotels, places, and to forecast service demand such as the number of taxis needed in a part of a city.
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Topic Review
Electronic Leash
An electronic leash is the pairing (“leashing”) of one or more wireless devices to a host device that allows the user to find misplaced or out-of-sight objects by activating the host device such that the “leashed” object identifies itself. The system is identical in concept to a key pager, but offers multiple codes that allow a single user-operated device to send codes to a large number of objects. Leash systems generally also offer a form of distance measurement that raises an alarm if the leashed object travels more than a selected distance from the operator. An electronic leash with a paired devices usually includes a power source, transmitter and receiver. Optional elements can include tactile, auditory, or visual indicators to help the user realize the distance traveled from the object is past the maximum. Along with the physical elements, it is very common to have a computer program or mobile application to allow for modification of factory settings of distance allowed from source to receiver and the indication of this event occurring.
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Biography
Bruce Westerman
Bruce Eugene Westerman (born November 18, 1967) is a Republican U.S. Representative for Arkansas' 4th congressional district. Previously, he served as the Majority Leader of the Arkansas House of Representatives. In 2014, Westerman ran successfully for the U.S. House to succeed Tom Cotton, who had unseated Democratic U.S. Senator Mark Pryor. Westerman was reared in and still resides in Hot S
  • 417
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Topic Review
The Chemical Compositions of Industrial Wastes
As a result of global warming, the pursuance of low-carbon, sustainable building materials has been prioritized. The development of geopolymer/cement-less binders can be considered an innovative and green way forward to minimize carbon footprint and tackle industrial waste material utilization.
  • 609
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Topic Review
Advancements in Noble Metal Nanoparticles-Based Point-of-Care Testing
Noble metal nanoparticles (NM NPs) have been used for POC testing for decades. The most known example might be the lateral flow assay (LFA, or test strip), where Au NPs are usually utilized as colorimetric labels owing to their outstanding optical properties. Over-the-counter pregnancy tests and the recent COVID-19 antigen rapid tests are representative examples of the lateral flow assays (LFA). Over the last couple of decades, engineered NM NPs have been extensively used for the point-of-care (POC) tests of various platforms beyond the LFA, despite most of them being in early stages of commercialization. This recent NM NPs-based POC testing techniques with innovative designs are discussed.
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Topic Review
Talkboy
Talkboy is a line of handheld voice recorder and sound novelty toys manufactured by Tiger Electronics (now owned by Hasbro) in the 1990s. The Talkboy was originally conceived as a cassette recorder and player prop for the 1992 film Home Alone 2: Lost in New York. At the request of director John Hughes and 20th Century Fox, Tiger designed and built the prop, and was given permission by the movie studio to sell a retail version of the toy. Two cassette recorders modeled after the film prop were released in 1992 and 1993, respectively. The original model did not have the variable-speed voice changer of the film version and sold only moderately during the 1992 holiday shopping season. In April 1993, Tiger released the Deluxe model, which added the voice-changing feature. Following the release of Home Alone 2 on home video in July with an insert advertising the Deluxe Talkboy, interest in the toy spiked. Retailers had severely underestimated demand, and as a result the Deluxe Talkboy was one of the most highly sought-after toys during the 1993 holiday shopping season, selling out of stores across the United States. A pink version of the cassette recorder called "Deluxe Talkgirl" was released in 1995. The success of the Talkboy cassette recorders spawned a product line of electronic toys. Tiger transitioned to digital recorders for subsequent devices, using solid-state storage and adding sound effects, beginning with "Talkboy/Talkgirl F/X+" pens in 1995, which sold more than a million units in 45 days.
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Topic Review
Shuttle-Derived Launch Vehicle
Shuttle-Derived Launch Vehicle (SDLV), or simply Shuttle-Derived Vehicle (SDV), is a term describing one of an array of concepts that have been developed for building space launch vehicles using the already developed components, technology, and infrastructure of the Space Shuttle program. In the late 1980s and early 1990s, NASA formally studied a cargo-only vehicle, Shuttle-C, that would have supplemented the crewed Space Shuttle. In 2005, NASA was developing the Ares I and Ares V launch vehicles, based in part on highly modified Shuttle components, to enable exploration of the Moon and Mars. The agency also studied a third such vehicle, the Ares IV.
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Topic Review
Quad Flat Package
A QFP or Quad Flat Package is a surface-mounted integrated circuit package with "gull wing" leads extending from each of the four sides. Socketing such packages is rare and through-hole mounting is not possible. Versions ranging from 32 to 304 pins with a pitch ranging from 0.4 to 1.0 mm are common. Other special variants include low-profile QFP (LQFP) and thin QFP (TQFP). The QFP component package type became common in Europe and United States during the early nineties, even though it has been used in Japan ese consumer electronics since the seventies. It is often mixed with hole mounted, and sometimes socketed, components on the same printed circuit board. A package related to QFP is PLCC which is similar but has pins with larger pitch, 1.27 mm (or 1/20 inch), curved up underneath a thicker body to simplify socketing (soldering is also possible). It is commonly used for NOR flash memories and other programmable components.
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