edgepedia

Technology and the built world

61,984 articles

Mersen

Mersen, formerly Carbone Lorraine until 2010, is a French industrial group founded in 1889 that designs electrical power components and advanced graphite and silicon carbide materials for energy, transportation, and electronics industries.

Mersenne Twister

The Mersenne Twister (MT) is a pseudorandom number generator invented by Makoto Matsumoto and Takuji Nishimura in 1997, producing uniform 32-bit integers with the prime period 2^19937−1.

Merseyrail

Merseyrail is the electric commuter rail network serving Merseyside around Liverpool, England, running Northern and Wirral line trains through a city-center underground loop and tunnels under the River Mersey.

Merton C. Flemings

Merton C. Flemings, born in 1929, is an American metallurgist and MIT professor emeritus who co-invented semi-solid metal processing, wrote Solidification Processing, and was elected to the National Academy of Engineering in 1976.

Meru Networks

Meru Networks was an American enterprise Wi-Fi company based in Sunnyvale, California, founded in 2002 and known for its Virtual Cell single-channel WLAN architecture; Fortinet acquired it in 2015.

Mervin E. Muller

Mervin E. Muller was a computer scientist who co-created the Box–Muller transform with George E. P. Box in 1958 and later spent fifteen years at the World Bank.

MES (transmission system operator)

MEPSO, formally the Electricity Transmission System Operator of the Republic of North Macedonia, is the sole electricity transmission system operator of North Macedonia, a fully state-owned company in Skopje established in 2005.

Mesa Airlines

Mesa Airlines is an American regional airline founded in 1982 in Farmington, New Mexico, headquartered in Phoenix, Arizona, and best known for flying as United Express.

Mesa/Boogie Rectifier

The Mesa/Boogie Rectifier is a series of high-gain all-tube guitar amplifiers made by MESA/Boogie of Petaluma, California, introduced in the early 1990s with the Dual Rectifier Solo Head.

Mesaieed

Mesaieed (مسيعيد), also known as Umm Said, is an industrial city and port about 40 km south of Doha, Qatar, handling crude oil exports and refining.

Mesaieed CCGT power station

The Mesaieed CCGT power station, also known as Mesaieed A or M Power, is a 2,000-megawatt combined cycle gas turbine plant near Doha, Qatar, completed in 2010.

MESFET

A MESFET, or metal-semiconductor field-effect transistor, is a transistor whose metal gate forms a Schottky barrier with the channel, usually in gallium arsenide, enabling operation at microwave frequencies.

Mesh (scale)

Mesh, or mesh size, measures the fineness of woven wire cloth and test sieves by openings per linear inch, with higher numbers passing smaller particles.

Mesh analysis

Mesh analysis, also called the mesh current or loop current method, solves planar electrical circuits by assigning a circulating current to each mesh and applying Kirchhoff's Voltage Law.

Mesh electronics

Mesh electronics is an ultraflexible, macroporous neural probe whose electrodes sit on a tissue-like mesh that integrates with brain tissue rather than piercing it, developed by Charles Lieber's Harvard lab.

Mesh generation

Mesh generation is the computational geometry technique that subdivides a geometric domain into discrete elements such as triangles and tetrahedra, so partial differential equations can be solved by finite element methods.

Mesh network

A mesh network is a network where nodes connect to several other nodes rather than one hub, giving multiple paths so traffic reroutes around failures.

Mesh optimization

Mesh optimization is a family of computational geometry methods that improve polygonal meshes by changing vertex positions, connectivity, and element count, introduced by Hugues Hoppe and colleagues in 1993.

Mesh shader

A mesh shader is a programmable graphics pipeline stage that processes batches of vertices and primitives before rasterization, introduced by NVIDIA with its Turing architecture in 2018 and supported in Direct3D 12 and Vulkan.

Mesh stiffness

Mesh stiffness is the stiffness of the elastic connection between two meshing gear teeth. It varies periodically with rotation because the number of contacting tooth pairs changes, exciting gear vibration and noise.

MeshCore

MeshCore is an open-source firmware project that turns low-cost LoRa radio boards into encrypted, off-grid text-messaging mesh networks using companion, repeater, and room server nodes.

Meshtastic

Meshtastic is an open-source, community-driven project that turns inexpensive LoRa radios into a long-range mesh for text messages and locations without cellular or internet service.

Mesnac

Mesnac (软控股份) is a Chinese manufacturer of rubber and tire machinery headquartered in Qingdao, founded in 2000 and listed on the Shenzhen Stock Exchange in 2006.

Meso-superstructured perovskite solar cell

The meso-superstructured perovskite solar cell (MSSC), introduced at Oxford in 2012, coats a perovskite absorber on an insulating mesoporous alumina scaffold, proving the perovskite transports its own charges and reaching 10.9% efficiency.

Mesobot

Mesobot is a 250-kilogram hybrid underwater robot, developed by Woods Hole Oceanographic Institution and partners, that tracks and films midwater animals in the ocean's twilight zone down to 1000 meters.

Mesoscopic perovskite solar cell

A mesoscopic perovskite solar cell is a perovskite photovoltaic device in which the absorber forms inside a porous metal-oxide scaffold, an architecture descended from the dye-sensitized solar cell.

Mesquite Solar

Mesquite Solar is a utility-scale photovoltaic solar power complex in Arlington, Arizona, about 40 miles west of Phoenix, reaching about 530 MW of operating capacity in January 2024.

Message authentication code

A message authentication code (MAC), also called an authentication tag, is a cryptographic function using a shared secret key to verify a message's integrity and origin.

Message broker

A message broker is a server-side intermediary that receives messages from producing applications, stores and routes them, and delivers them to consumers; implementations include RabbitMQ and Apache Kafka.

Message in a bottle

A message in a bottle, also called a drift bottle, is a written message sealed in a bottle and set adrift in the hope a stranger will find it.