Random Articles (Page 172)
Have a deep view into what people are curious about.
๐ World's Littlest Skyscraper
The NewbyโMcMahon Building, commonly referred to as the world's littlest skyscraper, is located at 701 La Salle (on the corner of Seventh and La Salle streets) in downtown Wichita Falls, Texas. It is a late Neoclassical style red brick and cast stone structure. It stands 40ย ft (12ย m) tall, and its exterior dimensions are 18ย ft (5.5ย m) deep and 10ย ft (3.0ย m) wide. Its interior dimensions are approximately 12ย ft (3.7ย m) by 9ย ft (2.7ย m), or approximately 108ย sqย ft (10.0ย m2). Steep, narrow, internal stairways leading to the upper floors occupy roughly 25 percent of the interior area.
Reportedly the result of a fraudulent investment scheme by a confidence man, the NewbyโMcMahon Building was a source of great embarrassment to the city and its residents after its completion in 1919. During the 1920s, the NewbyโMcMahon Building was featured in Robert Ripley's Ripley's Believe It or Not! syndicated column as "the world's littlest skyscraper," a nickname that has stuck with it ever since. The NewbyโMcMahon Building is now part of the Depot Square Historic District of Wichita Falls, a Texas Historic Landmark.
Discussed on
- "World's Littlest Skyscraper" | 2021-03-13 | 131 Upvotes 49 Comments
๐ El Paquete Semanal
El Paquete Semanal ("The Weekly Package") or El Paquete is a one terabyte collection of digital material distributed since around 2008 on the underground market in Cuba as a substitute for broadband Internet. Since 2015, it has been the primary source of entertainment for millions of Cubans, as Internet in Cuba has been suppressed for many years with only about a 38.8% Internet penetration rate as of 2018. El Paquete Semanal has its own page that is running in the United States, where one could view its contents and is consistently updated every week.
Discussed on
- "El Paquete Semanal" | 2023-06-11 | 183 Upvotes 51 Comments
๐ Printer's key
The printerโs key, also known as the number line, is a line of text printed on the copyright page (often the verso of the title page, especially in English-language publishing) of books, used to indicate the print run. Publishers began this convention about the middle of the 20th century.
An example follows:
This is how the printer's key will appear in the first print run of a book. Numbers are removed with subsequent printings, so if "1" is seen then the book is the first printing of that edition. If it is the second printing then the "1" is removed, meaning that the lowest number seen will be "2".
Discussed on
- "Printer's key" | 2015-08-06 | 66 Upvotes 15 Comments
๐ Nepal Standard Time
Nepal Standard Time (NPT) is the time zone for Nepal. With a time offset from Coordinated Universal Time (UTC) of UTC+05:45 all over Nepal, it is one of only three time zones with a 45-minute offset from UTC. (The others are Chatham Island Standard Time, with an offset of UTC+12:45, and the unofficial Australian Central Western Time, with an offset of UTC+08:45.)
NPT is an approximation of Kathmandu mean time, which is 5:41:16 ahead of UTC. The standard meridian passes through the peak of Gaurishankar mountain about 100 kilometres (62ย mi) east of Kathmandu.
Nepal used local solar time until 1920, in Kathmandu UTC+05:41:16. In 1920, Nepal adopted Indian Standard Time, UTC+05:30. In 1986 Nepal advanced their clocks by 15 minutes, giving them a time zone of UTC+05:45.
Discussed on
- "Nepal Standard Time" | 2015-01-02 | 32 Upvotes 51 Comments
๐ Athens Charter
The Athens Charter (French: Charte d'Athรจnes, Greek: ฮงฮฌฯฯฮฑ ฯฯฮฝ ฮฮธฮทฮฝฯฮฝ) was a 1933 document about urban planning published by the Swiss architect Le Corbusier. The work was based upon Le Corbusierโs Ville Radieuse (Radiant City) book of 1935 and urban studies undertaken by the Congrรจs International d'Architecture Moderne (CIAM) in the early 1930s.
The Charter got its name from location of the fourth CIAM conference in 1933, which, due to the deteriorating political situation in Russia, took place on the S.S. Patris bound for Athens from Marseille. This conference is documented in a film commissioned by Sigfried Giedion and made by his friend Laszlo Moholy-Nagy: "Architects' Congress."
The Charter had a significant impact on urban planning after World War II.
Discussed on
- "Athens Charter" | 2023-04-21 | 38 Upvotes 13 Comments
๐ Granular convection
Granular convection, or granular segregation, is a phenomenon where granular material subjected to shaking or vibration will exhibit circulation patterns similar to types of fluid convection. It is sometimes described as the Brazil nut effect when the largest particles end up on the surface of a granular material containing a mixture of variously sized objects; this derives from the example of a typical container of mixed nuts, where the largest will be Brazil nuts. The phenomenon is also known as the muesli effect since it is seen in packets of breakfast cereal containing particles of different sizes but similar density, such as muesli mix.
Under experimental conditions, granular convection of variously sized particles has been observed forming convection cells similar to fluid motion. The convection of granular flows is becoming a well-understood phenomenon.
Discussed on
- "Granular convection" | 2019-12-10 | 46 Upvotes 22 Comments
๐ Plasma Antenna
A plasma antenna is a type of radio antenna currently in development in which plasma is used instead of the metal elements of a traditional antenna. A plasma antenna can be used for both transmission and reception. Although plasma antennas have only become practical in recent years, the idea is not new; a patent for an antenna using the concept was granted to J. Hettinger in 1919.
Early practical examples of the technology used discharge tubes to contain the plasma and are referred to as ionized gas plasma antennas. Ionized gas plasma antennas can be turned on and off and are good for stealth and resistance to electronic warfare and cyber attacks. Ionized gas plasma antennas can be nested such that the higher frequency plasma antennas are placed inside lower frequency plasma antennas. Higher frequency ionized gas plasma antenna arrays can transmit and receive through lower frequency ionized gas plasma antenna arrays. This means that the ionized gas plasma antennas can be co-located and ionized gas plasma antenna arrays can be stacked. Ionized gas plasma antennas can eliminate or reduce co-site interference. Smart ionized gas plasma antennas use plasma physics to shape and steer the antenna beams without the need of phased arrays. Satellite signals can be steered or focused in the reflective or refractive modes using banks of plasma tubes making unique ionized gas satellite plasma antennas. The thermal noise of ionized gas plasma antennas is less than in the corresponding metal antennas at the higher frequencies. Solid state plasma antennas (also known as plasma silicon antennas) with steerable directional functionality that can be manufactured using standard silicon chip fabrication techniques are now also in development. Plasma silicon antennas are candidates for use in WiGig (the planned enhancement to Wi-Fi), and have other potential applications, for example in reducing the cost of vehicle-mounted radar collision avoidance systems.
Discussed on
- "Plasma Antenna" | 2019-09-10 | 136 Upvotes 54 Comments
๐ Proof-of-work system
A proof-of-work (PoW) system (or protocol, or function) is a consensus mechanism. It deters denial-of-service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer. The concept was invented by Cynthia Dwork and Moni Naor as presented in a 1993 journal article. The term "proof of work" was first coined and formalized in a 1999 paper by Markus Jakobsson and Ari Juels.
A key feature of these schemes is their asymmetry: the work must be moderately hard (yet feasible) on the requester side but easy to check for the service provider. This idea is also known as a CPU cost function, client puzzle, computational puzzle, or CPU pricing function. It is distinct from a CAPTCHA, which is intended for a human to solve quickly, while being difficult to solve for a computer.
Discussed on
- "Proof-of-work system" | 2011-03-30 | 42 Upvotes 13 Comments
๐ O-bahn Busway
The O-Bahn Busway is a guided busway that is part of the bus rapid transit system servicing the northeastern suburbs of Adelaide, South Australia. The O-Bahn system was conceived by Daimler-Benz to enable buses to avoid traffic congestion by sharing tram tunnels in the German city of Essen.
Adelaide's O-Bahn was introduced in 1986 to service the city's rapidly expanding north-eastern suburbs, replacing an earlier plan for a tramway extension. The O-Bahn provides specially built track, combining elements of both bus and rail systems. Adelaide's track is 12 kilometres (7.5ย mi) long and includes three interchanges at Klemzig, Paradise and Tea Tree Plaza. Interchanges allow buses to enter and exit the busway and to continue on suburban routes, avoiding the need for passengers to transfer to another bus to continue their journey. Buses can travel at a maximum speed of 100ย km/h (60ย mph), but are now restricted to 85ย km/h (53ย mph). As of 2015, the busway carries approximately 31,000 people per weekday. An additional section including a 670-metre (2,200ย ft) tunnel opened in 2017 at the city end to reduce the number of congested intersections buses must traverse to enter the Adelaide city centre.
The development of the O-Bahn busway led to the development of the Torrens Linear Park from a run-down urban drain into an attractive public open space. It has also triggered urban development around the north-eastern terminus at Modbury.
Discussed on
- "O-bahn Busway" | 2018-12-19 | 97 Upvotes 36 Comments
๐ JScript
JScript is Microsoft's dialect of the ECMAScript standard that is used in Microsoft's Internet Explorer.
JScript is implemented as an Active Scripting engine. This means that it can be "plugged in" to OLE Automation applications that support Active Scripting, such as Internet Explorer, Active Server Pages, and Windows Script Host. It also means such applications can use multiple Active Scripting languages, e.g., JScript, VBScript or PerlScript.
JScript was first supported in the Internet Explorer 3.0 browser released in August 1996. Its most recent version is JScript 9.0, included in Internet Explorer 9.
JScript 10.0 is a separate dialect, also known as JScript .NET, which adds several new features from the abandoned fourth edition of the ECMAScript standard. It must be compiled for .NET Framework version 2 or version 4, but static type annotations are optional.
Discussed on
- "JScript" | 2021-08-29 | 15 Upvotes 18 Comments