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Uncrewed Surface Vehicle
Unmanned surface vehicles (USVs), also known as unmanned surface vessels, autonomous surface vehicles (ASVs) in some cases, uncrewed surface vessels (USVs), or colloquially drone ships, or robot boats, are boats or ships that operate on the surface of the water without a crew. USVs operate with various levels of autonomy, from remote control to fully autonomous. Some commercial USVs may utilize COLREGs-compliant navigation. USVs were used militarily as early as World War II for remote controlled target craft and minesweeper purposes, they are becoming more widely used in the twenty-first century for a range of purposes including oceanography and environmental monitoring, as well as cargo transport, and military applications. Various other applications are also being explored. In October 2022 during the Russian invasion of Ukraine Ukraine armed forces used 7 USVs and 8 UAVs in an attack on multiple Russian naval vessels at the Sevastopol Naval Base. According to Naval News, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SF Shiretoko Tomakomai
SF may refer to: Locations * San Francisco, California, United States * Sidi Fredj, Algeria * South Florida, an urban region in the United States * Suomi Finland, former vehicular country code for Finland In arts and entertainment Genres * Speculative fiction (usually ''sf'') ** Science fiction or sci-fi (usually ''SF'') In film and television * , the Swedish film industry ** SF Film Finland, a Finnish film distributor * SF Channel (Australia) * , a German-language television network in Switzerland * , a Finnish film production company In music * Sforzando (musical direction) or sf, a musical accent * ''Subito forte'', a musical notation for dynamics (music) * Switchfoot, a band * Sasha Fierce, on-stage alter ego of American entertainer Beyoncé, and namesake of her album '' I Am... Sasha Fierce'' Other media * Saikoro Fiction, a Japanese role-playing game system * ''Street Fighter'', a series of fighting video games by Capcom Businesses and organizations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USV Maxlimer
USV ''Maxlimer'' is a semi-autonomous, remotely controlled unmanned surface vehicle (USV) owned and operated by the British company SEA-KIT International. She was the winning entry in the Shell Ocean Discovery X Prize competition, and subsequently has been used as a proof-of-concept vessel for uncrewed, over-the-horizon offshore operations. History ''Maxlimer'' was constructed in Maldon, Essex, for the GEBCO-NF Alumni Team, an international group that competed in the Ocean Discovery X Prize. During the competition, which took place in late 2018, ''Maxlimer'' deployed a HUGIN autonomous underwater vehicle to map of seafloor in the Mediterranean Sea off the Greek city of Kalamata in 24 hours, an accomplishment that made GEBCO-NF the winning team. In May 2019, ''Maxlimer'' made a demonstration crossing of the North Sea between West Mersea, England and Ostend, Belgium. On the outbound trip to Belgium, she carried a cargo of of oysters, and on the return a case of beer. Though lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamic Positioning
Dynamic positioning (DP) is a computer-controlled system to automatically maintain a vessel's position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, motion sensors and gyrocompasses, provide information to the computer pertaining to the vessel's position and the magnitude and direction of environmental forces affecting its position. Examples of vessel types that employ DP include ships and semi-submersible mobile offshore drilling units (MODU), oceanographic research vessels, cable layer ships and cruise ships. The computer program contains a mathematical model of the vessel that includes information pertaining to the wind and current drag of the vessel and the location of the thrusters. This knowledge, combined with the sensor information, allows the computer to calculate the required steering angle and thruster output for each thruster. This allows operations at sea where mooring or anchoring is not feasible du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deadband
A deadband or dead-band (also known as a dead zone or a neutral zone) is a band of input values in the domain of a transfer function in a control system or signal processing system where the output is zero (the output is 'dead' - no action occurs). Deadband regions can be used in control systems such as servoamplifiers to prevent oscillation or repeated activation-deactivation cycles (called 'hunting' in proportional control systems). A form of deadband that occurs in mechanical systems, compound machines such as gear trains is backlash. Voltage regulators In some power substations there are regulators that keep the voltage within certain predetermined limits, but there is a range of voltage in-between during which no changes are made, such as between 112 and 118 volts (the deadband is 6 volts), or between 215 to 225 volts (deadband is 10 volts). Backlash Gear teeth with slop ('' backlash'') exhibit deadband. There is no drive from the input to the output shaft in either ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detent
A detent is a mechanical or magnetic means to resist or arrest the movement of a mechanical device. Such a device can be anything ranging from a simple metal pin to a machine. The term is also used for the method involved. Magnetic detents are most often used to divide a shaft rotation into discrete increments. Magnetic detents are inherent in some types of electric motors, most often stepper motors. Mechanics Arresting movement Ratchet and pawl The ratchet-and-pawl design arrests movements by employing a small gravity- or spring-actuated lever paired with a notched wheel. The lever is mounted on a pivot point in proximity to the wheel. The vertical angle of the sides of the notches that face the direction that rotation is desired is generally very acute (45 degrees or less), so that as the wheel rotates in that direction, the end of the lever is easily lifted or pushed out and over the top of a notch. Following this, the lever drops into the next notch and the next et cet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Tachograph
A digital tachograph is a device fitted to a vehicle that digitally records its speed and distance, together with the driver's activity selected from a choice of modes. In Europe, it succeeded the analogue tachograph as a result of European Union regulation 1360/2002 that made digital tachographs mandatory for all relevant vehicles manufactured after August 1, 2005. Digital tachographs would be required as of May 1, 2006 for all new vehicles for which EWG regulation VO(EWG)3820/85 applies, as is published in the official newsletter of the European Union L102 from April 11, 2006. Digital tachograph system A digital tachograph system consists of a digital driver card, the tachograph head, and a sender unit mounted to the vehicle gearbox. The sender unit produces electronic pulses as the gearbox output shaft turns. These pulses are interpreted as speed data by the head. The sender unit and head are electronically paired and the pulses from the sender to the head are encrypt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CAN Bus
A Controller Area Network (CAN bus) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other's applications without a host computer. It is a message-based protocol, designed originally for multiplex electrical wiring within automobiles to save on copper, but it can also be used in many other contexts. For each device, the data in a frame is transmitted serially but in such a way that if more than one device transmits at the same time, the highest priority device can continue while the others back off. Frames are received by all devices, including by the transmitting device. History Development of the CAN bus started in 1983 at Robert Bosch GmbH. The protocol was officially released in 1986 at the Society of Automotive Engineers (SAE) conference in Detroit, Michigan. The first CAN controller chips were introduced by Intel in 1987, and shortly thereafter by Philips. Released in 1991, the Mercedes-Benz W140 was the first produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WWMT
WWMT (channel 3) is a television station licensed to Kalamazoo, Michigan, United States, serving West Michigan as an affiliate of CBS and The CW. The station is owned by Sinclair Broadcast Group, and maintains studios on West Maple Street in Kalamazoo; its transmitter is located in northwest Yankee Springs Township on Chief Noonday Road/ M-179 near Patterson Road. History The station signed on the air on June 1, 1950, as WKZO-TV (the call letters standing for "Kalamazoo"). It was West Michigan's second television station to debut after WLAV-TV (channel 7, now WOOD-TV channel 8) and was owned by broadcasting pioneer John Fetzer, along with WKZO radio, which Fetzer had owned since 1930. It carried programming from all four networks of the time: CBS, NBC, ABC and DuMont. However, it has always been a primary CBS affiliate owing to its radio sister's longtime affiliation with the CBS Radio Network. From the start, WKZO-TV had reception problems due to the presence of WTMJ-TV acr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferry
A ferry is a ship, watercraft or amphibious vehicle used to carry passengers, and sometimes vehicles and cargo, across a body of water. A passenger ferry with many stops, such as in Venice, Italy, is sometimes called a water bus or water taxi. Ferries form a part of the public transport systems of many waterside cities and islands, allowing direct transit between points at a capital cost much lower than bridges or tunnels. Ship connections of much larger distances (such as over long distances in water bodies like the Mediterranean Sea) may also be called ferry services, and many carry vehicles. History In ancient times The profession of the ferryman is embodied in Greek mythology in Charon, the boatman who transported souls across the River Styx to the Underworld. Speculation that a pair of oxen propelled a ship having a water wheel can be found in 4th century Roman literature "''Anonymus De Rebus Bellicis''". Though impractical, there is no reason why it could not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HardwareX
''HardwareX'' is a peer-reviewed open access scientific journal dedicated to the open source design and construction of scientific instrumentation. The journal publishes science hardware shared under an open source hardware license. Published articles include science hardware over a broad range of scientific disciplines, from life science and engineering research, to ecological and environmental monitoring, to digital manufacturing (e.g. 3D printing 3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model. It can be done in a variety of processes in which material is deposited, joined or solidified under computer co ...), to educational tools. It popularizes the ideas of open-source hardware and open science. References External links * HardwareX Frequently Asked Questions Publications established in 2017 Elsevier academic journals English-language journals Open-source hardware ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seafloor Mapping
Seafloor mapping (or seabed mapping), also called seafloor imaging (or seabed imaging), is the measurement, mapping, and imaging of water depth of the ocean (''seabed topography'') or another given body of water. Bathymetric measurements are conducted with various methods, from depth sounding, sonar and Lidar techniques, to buoys and satellite altimetry. Various methods have advantages and disadvantages and the specific method used depends upon the scale of the area under study, financial means, desired measurement accuracy, and additional variables. Despite modern computer-based research, the ocean seabed in many locations is less measured than the topography of Mars. History The earliest methods of depth measurement on record are the use of sounding poles and weighted lines, recorded from Egypt more than 3000 years ago, and in use without significant improvement until the voyage of HMS ''Challenger'' in the 1870s, when similar systems using wires and a winch were used for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC News
BBC News is an operational business division of the British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs in the UK and around the world. The department is the world's largest broadcast news organisation and generates about 120 hours of radio and television output each day, as well as online news coverage. The service maintains 50 foreign news bureaus with more than 250 correspondents around the world. Deborah Turness has been the CEO of news and current affairs since September 2022. In 2019, it was reported in an Ofcom report that the BBC spent £136m on news during the period April 2018 to March 2019. BBC News' domestic, global and online news divisions are housed within the largest live newsroom in Europe, in Broadcasting House in central London. Parliamentary coverage is produced and broadcast from studios in London. Through BBC English Regions, the BBC also has regional centres across England and national news ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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