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Commitment Ordering
Commitment ordering (CO) is a class of interoperable ''serializability'' techniques in concurrency control of databases, transaction processing, and related applications. It allows optimistic (non-blocking) implementations. With the proliferation of multi-core processors, CO has also been increasingly utilized in concurrent programming, transactional memory, and software transactional memory (STM) to achieve serializability optimistically. CO is also the name of the resulting transaction schedule (history) property, defined in 1988 with the name ''dynamic atomicity''.Alan Fekete, Nancy Lynch, Michael Merritt, William Weihl (1988)''Commutativity-based locking for nested transactions'' (PDF)MIT, LCS lab, Technical report MIT/LCS/TM-370, August 1988. In a CO compliant schedule, the chronological order of commitment events of transactions is compatible with the precedence order of the respective transactions. CO is a broad special case of '' conflict serializability'' and effective m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Monoxide
Carbon monoxide (chemical formula CO) is a poisonous, flammable gas that is colorless, odorless, tasteless, and slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the simplest oxocarbon, carbon oxide. In coordination complexes, the carbon monoxide ligand is called ''metal carbonyl, carbonyl''. It is a key ingredient in many processes in industrial chemistry. The most common source of carbon monoxide is the partial combustion of carbon-containing compounds. Numerous environmental and biological sources generate carbon monoxide. In industry, carbon monoxide is important in the production of many compounds, including drugs, fragrances, and fuels. Indoors CO is one of the most acutely toxic contaminants affecting indoor air quality. CO may be emitted from tobacco smoke and generated from malfunctioning fuel-burning stoves (wood, kerosene, natural gas, propane) and fuel-burning heating systems (wood, oil, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colombia
Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuela to the east and northeast, Brazil to the southeast, Peru and Ecuador to the south and southwest, the Pacific Ocean to the west, and Panama to the northwest. Colombia is divided into 32 Departments of Colombia, departments. The Capital District of Bogotá is also the List of cities in Colombia by population, country's largest city hosting the main financial and cultural hub. Other major urban areas include Medellín, Cali, Barranquilla, Cartagena, Colombia, Cartagena, Santa Marta, Cúcuta, Ibagué, Villavicencio and Bucaramanga. It covers an area of 1,141,748 square kilometers (440,831 sq mi) and has a population of around 52 million. Its rich cultural heritage—including language, religion, cuisine, and art—reflects its history as a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemins De Fer Orientaux
The Chemins de fer Orientaux (English: Oriental Railway; or ''İstanbul-Viyana Demiryolu'') (reporting mark: CO) was an Ottoman Empire, Ottoman railway company operating in Rumelia (the European part of the Ottoman Empire, corresponding to the Balkans, Balkan peninsula) and later Eastern Thrace, European Turkey, from 1870 to 1937.History of the CO - ''trainsofturkey.com'' The CO was one of the five pioneer railways in the Ottoman Empire and built the main trunk line in the Balkans. Between 1889 and 1937, the railway hosted the world-famous Orient Express. The railway was charted in 1870 to build a line from Istanbul to Vienna. Because of many political problems in the Balkans, construction started and stopped and ownership changed or split often. Not until 1888 did the CO complete its objective, but after the First Balkan War ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado
Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas to the east, and Oklahoma to the southeast. Colorado is noted for its landscape of mountains, forests, High Plains (United States), high plains, mesas, canyons, plateaus, rivers, and desert lands. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the List of U.S. states and territories by area, eighth-largest U.S. state by area and the List of U.S. states and territories by population, 21st by population. The United States Census Bureau estimated the population of Colorado to be 5,957,493 as of July 1, 2024, a 3.2% increase from the 2020 United States census. The region has been inhabited by Native Americans in the United St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Airlines
Continental Airlines (simply known as Continental) was a major airline in the United States that operated from 1934 until it merged with United Airlines in 2012. It had ownership interests and brand partnerships with several carriers. Continental started out as one of the smaller carriers in the United States, known for its limited operations under the regulated era that provided very fine, almost fancy, service against the larger majors in important point-to-point markets, the largest of which was Chicago/Los Angeles. However, deregulation in 1978 changed the competitive landscape and realities, as noted by Smithsonian Airline Historian R. E. G. Davies, "Unfortunately, the policies that had been successful for more than forty years under [Robert] Six's cavalier style of management were suddenly laid bare as the cold winds of airline deregulation changed all the rules—specifically, the balance between revenues and expenditures." In 1981, Texas International Airlines acquired ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CO Postcode Area
The CO postcode area, also known as the Colchester postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of sixteen postcode districts in the east of England, within nine post towns. These cover northeast Essex (including Colchester, Clacton-on-Sea, Frinton-on-Sea, Halstead, Harwich, Manningtree and Walton-on-the-Naze) and a small part of south Suffolk (including Bures and Sudbury). The main sorting office was in Colchester but as at 2021 there was no Mail Centre in Colchester. __TOC__ Coverage The approximate coverage of the postcode districts: , - ! CO1 , COLCHESTER , Colchester , Colchester , - ! CO2 , COLCHESTER , Old Heath, Berechurch, Layer de la Haye , Colchester , - ! CO3 , COLCHESTER , Lexden, Fordham Heath, Stanway , Colchester , - ! CO4 , COLCHESTER , Greenstead, Highwoods, St Johns, Myland, Boxted, Braiswick , Colchester , - ! CO5 , COLCHESTER , Tiptree, Kelvedon, West Mersea, Peldon, Rowhedge , Colchester, Braint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Co (second-level Domain)
CO or variants may refer to: Chemistry * Carbon monoxide (CO), a colorless, odorless, and tasteless gas * Carbonyl group, composed of a carbon atom double-bonded to an oxygen atom: C=O * Cobalt, a chemical element, symbol Co Computing and telecommunications * .co (second-level domain), the Internet second-level domain meaning "commercial" * .co, the Internet country code top-level domain (ccTLD) for Colombia * Commitment ordering (CO), a concurrency control technique for databases * Telephone exchange, or central office (CO) Mathematics * Cofunction, or Co, in trigonometry * Cuboctahedron, a uniform polyhedron People * Nguyễn Hữu Có (1925–2012), Vietnamese general * Conrado Co (born 1940), Filipino badminton player * Alfredo Co (born 1949), Filipino Sinologist * Atoy Co (born 1951), Filipino actor and basketball coach * Leonard Co (1953–2010), Filipino botanist * Nando Có (born 1973), Bissau-Guinean footballer * Kenedy Có (born 1998), Bissau-Guinean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbonyl Group
In organic chemistry, a carbonyl group is a functional group with the formula , composed of a carbon atom double-bonded to an oxygen atom, and it is divalent at the C atom. It is common to several classes of organic compounds (such as aldehydes, ketones and carboxylic acid), as part of many larger functional groups. A compound containing a carbonyl group is often referred to as a carbonyl compound. The term carbonyl can also refer to carbon monoxide as a ligand in an inorganic or organometallic complex (a metal carbonyl, e.g. nickel carbonyl). The remainder of this article concerns itself with the organic chemistry definition of carbonyl, such that carbon and oxygen share a double bond. Carbonyl compounds In organic chemistry, a carbonyl group characterizes the following types of compounds: Other organic carbonyls are urea and the carbamates, the derivatives of acyl chlorides, chloroformates and phosgene, carbonate esters, thioesters, lactones, lactams, hydroxama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commanding Officer
The commanding officer (CO) or commander, or sometimes, if the incumbent is a general officer, commanding general (CG), is the officer in command of a military unit. The commanding officer has ultimate authority over the unit, and is usually given wide latitude to run the unit as they see fit, within the bounds of military law. In this respect, commanding officers have significant responsibilities (for example, the use of force, finances, equipment, the Geneva Conventions), duties (to higher authority, mission effectiveness, duty of care to personnel), and powers (for example, discipline and punishment of personnel within certain limits of military law). In some countries, commanding officers may be of any commissioned rank. Usually, there are more officers than command positions available, and time spent in command is generally a key aspect of promotion, so the role of commanding officer is highly valued. The commanding officer is often assisted by an executive officer (XO) or s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conscientious Objector
A conscientious objector is an "individual who has claimed the right to refuse to perform military service" on the grounds of freedom of conscience or religion. The term has also been extended to objecting to working for the military–industrial complex due to a crisis of conscience. In some countries, conscientious objectors are assigned to an alternative civilian service as a substitute for conscription or military service. A number of organizations around the world celebrate the principle on May 15 as International Conscientious Objection Day. On March 8, 1995, the United Nations Commission on Human Rights resolution 1995/83 stated that "persons performing military service should not be excluded from the right to have conscientious objections to military service". This was re-affirmed on April 22, 1998, when resolution 1998/77 recognized that "persons lreadyperforming military service may ''develop'' conscientious objections". History Many conscientious objectors h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cobalt Air
Cobalt Air was a Cypriot airline headquartered in Nicosia based out of Larnaca International Airport. The airline operated its maiden flight on 1 June 2016 from Larnaca to Athens. It was the second Cypriot airline after Tus Airways to be established since the dissolution of flag carrier Cyprus Airways in 2015. From June 2017 until October 2018, it was the second largest airline at Larnaca International Airport with 8.2% of weekly capacity after Aegean Airlines, and was predicted to become the largest airline by summer 2018 following expansion and the subsequent reduction by Aegean in Larnaca. However, Cobalt Air ceased all operations on 17 October 2018 facing financial difficulties. History The first Airbus A320 aircraft arrived in April 2016 and the airline was granted an air operator's certificate (AOC) on 18 May 2016 following a test flight between Larnaca and Heraklion. According to chairman Gregory Diacou, Cobalt planned to receive another three aircraft of the same t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
