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SFG Emblem
SFG may refer to: Military *Special Forces Group (Belgium) *Special Forces Group (Japan) *Special Forces (United States Army)#Special Forces groups Science and Technology *Sum-frequency generation in optical physics *Signal-flow graph *Superior frontal gyrus, in the human brain *Systemic functional grammar Other *San Francisco Giants, a Major League Baseball team *L'Espérance Airport, IATA airport code {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Special Forces Group (Belgium)
The Special Forces Group is the special forces unit in the Land Component of the Belgian Armed Forces. Members of the Special Forces Group are selected from all the components of the Belgian Armed Forces. Candidates must have at least three years' experience in the military to join the Special Forces Group. History In January 1942 the first Belgian parachutists were trained at RAF Ringway, Manchester, England. The same year, the Belgian Independent Parachute Company was established and commanded by Captain E. Blondeel. Later, the unit was incorporated into the Special Air Service Brigade and became the 5th Special Air Service (known as the Belgian SAS squadron). The SAS squadron was active during World War II until enemy activities were discontinued. They performed several operations using the parachute regiment and armoured jeeps. Thereafter, the unit also took part in counter intelligence operations. On 21 September 1945 5th SAS was transferred from the British Army to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Special Forces Group (Japan)
The is the Japan Ground Self-Defense Force's special forces unit established on March 27, 2004 by the then Defense Agency to counter terrorist activities and deter guerrilla-style attacks on Japanese soil and to conduct military operations against guerrillas or enemy commandos. The unit is based in Camp Narashino in Funabashi, Chiba along with the 1st Airborne Brigade. The SFGp has been referred to as Japan's Green Berets and Delta Force, due to their specialized role in the Japan Ground Self-Defense Force. The initial members of the Special Forces Group trained with Delta Force. The civilian counterpart of the SFGp is the Special Assault Teams of the prefectural police departments under the Japanese National Police Agency. While current manpower is classified, an estimated 300 operators are known to serve in the SFGp. History In 1998, the Defense Agency had proposed the formation of a unit within the JGSDF that would handle tasks such as counter-terrorism with a selected gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Special Forces (United States Army)
The United States Army Special Forces (SF), colloquially known as the "Green Berets" due to their distinctive service Berets of the United States Army, headgear, are a special operations special operations force, force of the United States Army. The Green Berets are geared towards nine doctrinal missions: unconventional warfare (United States), unconventional warfare, foreign internal defense, direct action (military), direct action, counter-insurgency, counterinsurgency, special reconnaissance, counter-terrorism, counterterrorism, information operations, counterproliferation of weapons of mass destruction, and security force assistance. The unit emphasizes language, cultural, and training skills in working with foreign troops; recruits are required to learn a foreign language as part of their training and must maintain knowledge of the political, economic, and cultural complexities of the regions in which they are deployed. Other Special Forces missions, known as secondary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sum-frequency Generation
Sum-frequency generation (SFG) is a second order nonlinear optical process based on the annihilation of two input photons at angular frequencies \omega_1 and \omega_2 while, simultaneously, one photon at frequency \omega_3 is generated. As with any second order \chi^ phenomenon in nonlinear optics, this can only occur under conditions where: the light is interacting with matter, which is asymmetric (for example, surfaces and interfaces); the light has a very high intensity (typically from a pulsed laser). Sum-frequency generation is a "parametric process", meaning that the photons satisfy energy conservation, leaving the matter unchanged: :\hbar\omega_3 = \hbar\omega_1 + \hbar\omega_2 Second-harmonic generation A special case of sum-frequency generation is second-harmonic generation, in which \omega_1=\omega_2. In fact, in experimental physics, this is the most common type of sum-frequency generation. This is because in second-harmonic generation, only one input light beam is req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal-flow Graph
A signal-flow graph or signal-flowgraph (SFG), invented by Claude Shannon, but often called a Mason graph after Samuel Jefferson Mason who coined the term, is a specialized flow graph, a directed graph in which nodes represent system variables, and branches (edges, arcs, or arrows) represent functional connections between pairs of nodes. Thus, signal-flow graph theory builds on that of directed graphs (also called digraphs), which includes as well that of oriented graphs. This mathematical theory of digraphs exists, of course, quite apart from its applications. i SFGs are most commonly used to represent signal flow in a physical system and its controller(s), forming a cyber-physical system. Among their other uses are the representation of signal flow in various electronic networks and amplifiers, digital filters, state-variable filters and some other types of analog filters. In nearly all literature, a signal-flow graph is associated with a set of linear equations. Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superior Frontal Gyrus
In neuroanatomy, the superior frontal gyrus (SFG, also marginal gyrus) is a gyrus – a ridge on the brain's cerebral cortex – which makes up about one third of the frontal lobe. It is bounded laterally by the superior frontal sulcus. The superior frontal gyrus is one of the frontal gyri. Function Self-awareness In fMRI experiments, Goldberg ''et al.'' have found evidence that the superior frontal gyrus is involved in self-awareness, in coordination with the action of the sensory system. Laughter In 1998, neurosurgeon Itzhak Fried described a 16-year-old female patient (referred to as "patient AK") who laughed when her SFG was stimulated with electric current during treatment for epilepsy. Electrical stimulation was applied to the cortical surface of AK's left frontal lobe while an attempt was made to locate the focus of her epileptic seizures (which were never accompanied by laughter). Fried identified a 2 cm by 2 cm area on the left SFG where stimulation produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Systemic Functional Grammar
Systemic functional grammar (SFG) is a form of grammatical description originated by Michael Halliday. It is part of a social semiotic approach to language called '' systemic functional linguistics''. In these two terms, ''systemic'' refers to the view of language as "a network of systems, or interrelated sets of options for making meaning"; ''functional'' refers to Halliday's view that language is as it is because of what it has evolved to do (see Metafunction). Thus, what he refers to as the ''multidimensional architecture of language'' "reflects the multidimensional nature of human experience and interpersonal relations." Influences Halliday describes his grammar as built on the work of Saussure, Louis Hjelmslev, Malinowski, J.R. Firth, and the Prague school linguists. In addition, he drew on the work of the American anthropological linguists Boas, Sapir and Whorf. His "main inspiration" was Firth, to whom he owes, among other things, the notion of language as system. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco Giants
The San Francisco Giants are an American professional baseball team based in San Francisco, California. The Giants compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. Founded in 1883 as the New York Gothams, and renamed three years later the New York Giants, the team eventually moved from New York City to San Francisco in 1958. The franchise is one of the oldest and most successful in professional baseball, with more wins than any team in the history of major American sports. The team was the first major-league organization based in New York City, most memorably playing home games at several iterations of the Polo Grounds. The Giants have played in the World Series 20 times. In 2014, the Giants won their then-record 23rd National League pennant; this mark has since been equaled and then eclipsed by the rival Dodgers, who as of 2022 lay claim to 24 NL crowns. The Giants' eight World Series championships are second-most in the NL ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
