Portal:Technology

Porter station is a Massachusetts Bay Transportation Authority (MBTA) transit station in Cambridge, Massachusetts. It serves the Red Line rapid transit line, the MBTA Commuter Rail Fitchburg Line, and several MBTA bus lines. Located at Porter Square at the intersection of Massachusetts and Somerville Avenues, the station provides rapid transit access to northern Cambridge and the western portions of Somerville. Porter is 14 minutes from Park Street on the Red Line, and about 10 minutes from North Station on commuter rail trains. Several local MBTA bus routes also stop at the station.

A series of commuter rail depots have been located at Porter Square under various names since the 1840s. The modern station with both subway and commuter rail levels was designed by Cambridge Seven Associates and opened on December 8, 1984. At 105 feet (32 m) below ground, the subway section is the deepest station on the MBTA system. The station originally had six artworks installed as part of the Arts on the Line program. Five of these remain, including Gift of the Wind and Glove Cycle. (Full article...)

m-derived filters or m-type filters are a type of electronic filter designed using the image method. They were invented by Otto Zobel in the early 1920s. This filter type was originally intended for use with telephone multiplexing and was an improvement on the existing constant k type filter. The main problem being addressed was the need to achieve a better match of the filter into the terminating impedances. In general, all filters designed by the image method fail to give an exact match, but the m-type filter is a big improvement with suitable choice of the parameter m. The m-type filter section has a further advantage in that there is a rapid transition from the cut-off frequency of the passband to a pole of attenuation just inside the stopband. Despite these advantages, there is a drawback with m-type filters; at frequencies past the pole of attenuation, the response starts to rise again, and m-types have poor stopband rejection. For this reason, filters designed using m-type sections are often designed as composite filters with a mixture of k-type and m-type sections and different values of m at different points to get the optimum performance from both types. (Full article...)

K-284 is a state highway in the U.S. state of Kansas. The highway runs 5.618 miles (9.041 km) from K-14 east to Barnard in northern Lincoln County. The Kansas State Highway Commission wished to establish a state highway connection to Barnard in the 1960s, which they accomplished when they built K-284 in the early 1970s. (Full article...)

North Carolina Highway 231 (NC 231) is a 25.4-mile-long (40.9 km) primary state highway in the U.S. state of North Carolina. NC 231 travels through Wake County, Johnston County, and Nash County between its southern terminus at US 64 Business in Wendell and its northern terminus at US 64 Alternate/NC 98 near Spring Hope. Throughout Wake County and Johnston County, NC 231 primarily follows a southeast–northwest alignment. Entering into Nash County, NC 231 turns to follow a northerly alignment until reaching its northern terminus. NC 231 serves the towns of Wendell, Middlesex, and Spring Hope.

NC 231 was first established in 1926 running between Elizabethtown and Delco in Southeastern North Carolina. By 1929, NC 21 was extended southwest along the route of NC 231 and the highway was decommissioned. Modern-day NC 231 was established in 1935, between NC 39 in Emit and US 64 west of Spring Hope. In 1948, NC 231 was extended west along its current routing to US 64 in Wendell. With the exception of a minor realignment in 1978, the routing of NC 231 has remained the same since. (Full article...)

Whitehall is a road and area in the City of Westminster, Central London, England. The road forms the first part of the A3212 road from Trafalgar Square to Chelsea. It is the main thoroughfare running south from Trafalgar Square towards Parliament Square. The street is recognised as the centre of the Government of the United Kingdom and is lined with numerous departments and ministries, including the Ministry of Defence, Horse Guards, the Cabinet Office, and much of the Foreign Office. Consequently, the name "Whitehall" is used as a metonym for the British civil service and government, and as the geographic name for the surrounding area.

The Palace of Whitehall previously occupied the area and was the residence of Kings Henry VIII through to William III, before it was destroyed by fire in 1698; only the Banqueting House has survived. Whitehall was originally a wide road that led to the gates of the palace; the route to the south was widened in the 18th century, following the destruction of the palace, and the area was largely rebuilt for government offices. (Full article...)

The Lexus LS (Japanese: レクサス・LS, Hepburn: Rekusasu LS) is a series of full-size luxury sedans that have served as the flagship model of Lexus, the luxury division of Toyota, since 1989. For the first four generations, all LS models featured V8 engines and were predominantly rear-wheel-drive. In the fourth generation, Lexus offered all-wheel-drive, hybrid, and long-wheelbase variants. The fifth generation changed to using a V6 engine with no V8 option, and only one length was offered.

As the first model developed by Lexus, the LS 400 debuted in January 1989 with the second generation debuting in November 1994. The LS 430 debuted in January 2000 and the LS 460/LS 460 L series in 2006. A domestic-market version of the LS 400 and LS 430, badged as the Toyota Celsior (Japanese: トヨタ・セルシオ, Hepburn: Toyota Serushio), was sold in Japan until the Lexus marque was introduced there in 2006. In 2006 (for the 2007 model year), the fourth generation LS 460 debuted the first production eight-speed automatic transmission and an automatic parking system. In 2007, V8 hybrid powertrains were introduced on the LS 600h/LS 600h L sedans. (Full article...)

Flying Tiger Line Flight 739 was a Lockheed L-1049 Super Constellation propliner that disappeared on March 16, 1962, over the western Pacific Ocean. The aircraft, which had been chartered by the United States Army, was transporting ninety-six military passengers from Travis Air Force Base in California to Tan Son Nhut International Airport in Saigon, South Vietnam. After refueling at Andersen Air Force Base in Guam, the Super Constellation disappeared while en route to Clark Air Base in the Philippines. All 107 aboard were declared missing and presumed dead.

The airliner's disappearance prompted one of the largest air and sea searches in the history of the Pacific. Aircraft and surface ships from four branches of the US military searched more than 144,000 square miles (370,000 km²) during the course of eight days. A civilian tanker observed what appeared to be an in-flight explosion believed to be the missing Super Constellation, though no trace of wreckage or debris was ever recovered. (Full article...)

ChatGPT is a generative artificial intelligence chatbot developed by OpenAI. It was released in November 2022. It uses large language models—specifically generative pre-trained transformers (GPTs)—to generate text, speech, and images in response to user prompts. It is credited with accelerating the AI boom, an ongoing period marked by rapid investment and public attention toward the field of artificial intelligence (AI). OpenAI operates the service on a freemium model. Users can interact with ChatGPT through text, audio, and image prompts. (Full article...)

YouTube is an American online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Chad Hurley, Jawed Karim, and Steve Chen who were all former employees of PayPal. Headquartered in San Bruno, California, it is the second-most-visited website in the world, after Google itself. In January 2024, YouTube had reached more than 2.7 billion monthly active users, who collectively watched more than one billion hours of video every day. As of May 2019^[update], videos were being uploaded to the platform at a rate of more than 500 hours of video per minute, and as of mid-2024^[update], there were approximately 14.8 billion videos in total. (Full article...)

Facebook is an American social networking service owned by the American technology conglomerate Meta Platforms. It was founded in 2004 by Mark Zuckerberg, along with his Harvard College roommates and fellow students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes. The name Facebook derives from the face book directories often given to American university students. (Full article...)

Google LLC (/ˈɡuː.ɡəl/ ^ⓘ, GOO-gəl) is an American multinational technology corporation focused on information technology, online advertising, search engine technology, email, cloud computing, software, quantum computing, e-commerce, consumer electronics, and artificial intelligence (AI). It has been referred to as "the most powerful company in the world" by the BBC, and is one of the world's most valuable brands. Google's parent company Alphabet Inc. has been described as a Big Tech company. (Full article...)

Elon Reeve Musk (/ˈiːlɒn/ EE-lon; born June 28, 1971) is a businessman and entrepreneur known for his leadership of Tesla, SpaceX, X, and xAI. Musk has been the wealthiest person in the world since 2025; as of April 2026,^[update] Forbes estimates his net worth to be US$809 billion. (Full article...)

OpenClaw (formerly Clawdbot, Moltbot, and Molty) is a free and open-source autonomous artificial intelligence agent that can execute tasks via large language models (LLMs), using messaging platforms as its main user interface. (Full article...)

Anthropic PBC is an American artificial intelligence (AI) company headquartered in San Francisco. It has developed a range of large language models (LLMs) named Claude and focuses on AI safety. (Full article...)

A QR code, short for quick-response code, is a type of two-dimensional matrix barcode invented in 1994 by Masahiro Hara of the Japanese company Denso Wave for labelling automobile parts. It features white and black squares within a square grid featuring fiducial markers on the corners, readable by imaging devices like cameras, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. The required data is then extracted from patterns that are present in both the horizontal and the vertical components of the QR image. (Full article...)

Artificial intelligence (AI) is the capability of computational systems to perform tasks typically associated with human intelligence, such as learning, reasoning, problem-solving, perception, and decision-making. It is a field of research in engineering, mathematics and computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. (Full article...)

Claude is a series of large language models developed by Anthropic and first released in 2023. Since Claude 3, each generation has typically been released in three sizes, from least to most capable: Haiku, Sonnet, and Opus. An additional model named Claude Mythos was released to some companies in 2026 but not to the public. (Full article...)