Jamming - Jamming Jamming is an electronic warfare (EW) technique to limit the effectiveness of an opponents communications and/or detection equipment. Table of contents showTocToggle("show","hide") 1 Radio Jamming 2 Radar Jamming 3 E-mail Jamming Radio Jamming Communications jamming is usually aimed at radio signals to disrupt control of a battle. A transmitter, tuned to the same frequency as the opponents receiving equipment and with the same type of modulation, can with enough power override any signal at the receiver. The most common types of this form of signal jamming are: Random Noise; Random Pulse; Stepped Tones; Wobbler; Random Keyed Modulated CW; Tone; Rotary; Pulse; Spark; Recorded Sounds; Gulls; and Sweep-through. All of these can be divided into two groups - obvious and subtle. Obvious jamming is easy to.
Barrage jamming - Barrage jamming Barrage jamming: Jamming accomplished by transmitting a band of frequencies that is large with respect to the bandwidth of a single emitter. Note: Barrage jamming may be accomplished by presetting multiple jammers on adjacent frequencies or by using a single wideband transmitter. Barrage jamming makes it possible to jam emitters on different frequencies simultaneously and reduces the need for operator assistance or complex control equipment. These advantages are gained at the expense of reduced jamming power at any given frequency. Source: from Federal Standard 1037C.
Communications jamming - Communications jamming In telecommunication, the term communications jamming (COMJAM) has the following meanings: 1. The portion of electronic jamming that is directed against communications circuits and systems. 2. The prevention of successful radio communications by the use of electromagnetic signals, i.e., the deliberate radiation, reradiation, or reflection of electromagnetic energy with the objective of impairing the effective use of electronic communications systems. Note: The aim of communications jamming is to prevent communications by electromagnetic means, or at least to degrade communications sufficiently to cause delays in transmission and reception. Jamming may be used in conjunction with deception to achieve an overall electronic-countermeasure (ECM) plan implementation. Source: from Federal Standard 1037C.
Culture jamming - Culture jamming Culture Jamming, or sniggling, is the act of using existing mass media to comment on those very media themselves, using the original medium's communication method. It is based on the idea that advertising is little more than propaganda for established interests, and that there is little escape from this propaganda in industrialized nations. Culture jamming differs from artistic appropriation (which is done for art's sake), and from vandalism where destruction or defacement is the primary goal. The word, "culture jamming" comes from the idea of radio jamming: that public frequencies can be pirated and subverted for independent communication, or to disrupt dominant frequencies. The Situationist International first made the comparison to radio jamming in 1968, when it proposed the use of guerrilla communication within mass.
Knife - Carrying of knives in public is forbidden by law in many countries. Exceptions may be made for hunting knives, and for knives used for work-related purposes (eg.chef's knives). Knives are forbidden on aeroplanes and are among the illegal imports that may be confiscated at airports by customs staff. Anatomy of a Knife A knife has a blade, a tang and a handle. The tang is an extension of the blade into the handle, so that the handle can be strongly attached to the blade. Some knives have quillions between the blade and the handle, so that fingers cannot slip onto the edge and be cut. Quillions should be rounded so that they do not cut fingers, and strong enough so that they do not bend before the knife breaks. A nice.
Jam signal - multiple access with collision avoidance (CSMA/CA) networks, the jam signal indicates that the sending station intends to transmit. Note 3: "Jam signal" should not be confused with "electronic jamming." Source: from Federal Standard 1037C.
Jam band - means their invention. Early jazz musicians both pioneered the idea of improvisation and coined the term 'jam', though these 'jam sessions' tended to be completely free of constraints, whereas bands in the jam-scene tend to use the pretense of being confined by the boundaries of the song they are 'jamming out'. Table of contents showTocToggle("show","hide") 1 Types of Jamming 1.1 Type I 1.2 Type II 1.3 Segues 2 Types of Jam band Types of Jamming A Phish fan named John Flynn once noted that the band had two distinct styles of improvisation. Expanding those two defined categories, these can be applied to the music of jambands as a whole. Type I Improvisations based around the already existing chord progressions of pre-composed songs, consisting of variations on the written notes and tempo..
James Hetfield - David's drums and finally picking up a guitar in his pre-teens. Inspired by bands such as Black Sabbath, Led Zeppelin and Thin Lizzy, Hetfield, formed his first band, Obsession, in his early teens. Composed of the Veloz brothers on bass and drums, Jim Arnold on guitar, and Hetfield providing lead vocals, the band spent plenty of time in the Veloz brothers' garage jamming, with Ron McGoveny and Dave Marrs acting as roadies. Marrs and McGovney subsequently joined the band itself when the Veloz brothers quit. After moving to Brea, California, James attended Brea Olinda High School and met up with drummer Jim Mulligan. The two jammed at lunch time, scaring fellow guitarists with their loud and heavy sounds, before a guy called Hugh Tanner was seen carrying around part of a.
Joey Skaggs - presentations. He is also regarded as one of the originators of phenomena like culture jamming. In his youth Skaggs studied in the High School of Art and Design and School of Visual Arts in New York. In 1966-1968 Skaggs organized crucifixion performances in Easter Sundays. In 1968 Skaggs noticed that middle-class suburbanites had tours in East Village where they observed hippies. Skaggs organized a sightseeing tour for hippies in the suburb of Queens. In the Christmas day he made Vietnamese Christmas Nativity Burning to protest against Vietnam War. In 1969 he tied a 50’ bra in front of the U.S. Treasury building on Wall Street, organized a Hell's Angels’ wedding procession through Lower East Side and made grotesque Statues of Liberty on the 4th of July to again protest against the.
Vickers Valiant - the long bombbay. The crew were contained in a pressurized "egg" and consisted of pilot, copilot, two navigators, and an electronics operator. Only the pilot and copilot had ejection seats. This was a concern, particularly for the other three crew members who had to jump out of the bomber on their own. In fact, the Air Ministry had originally requested an escape system that would eject the entire crew compartment or, if that were not possible, ejection seats for all crew. Vickers engineers replied that this requirement was impractical. Experiments were later performed on providing the other three crew members of the Valiant with ejection seats, but this was not done due to the expense. In hindsight the good safety record of the Valiant, and indeed of all the V-bombers, made.
International broadcasting - verification cards or letters (QSLs). A third audience consists of journalists, government officials, and key business persons, who exert a disproportionate influence on a state's foreign or economic policy. A fourth, but less publicized audience, consists of intelligence officers and agents who monitor broadcasts for both open-source intelligence clues to the broadcasting state's policies and for hidden messages to foreign agents operating in the receiving country. The BBC started its monitoring service in Cavendish in 1936. In the United States, the Central Intelligence Agency's Foreign Broadcast Intelligence Service provides the same service. Copies of FBIS reports can be found in many U.S. libraries that serve as government depositories. In addition, a number of hobbyists listen and report “spook” transmissions. Without these four audiences, international broadcasters face difficulty in getting funding. In.
Inertial guidance system - system's inertial frame. It is widely used because it refers to no real-world item beyond itself. It is therefore immune to jamming and deception. (See relativity and Mach's principle for some background in the physics involved). An inertial guidance system consists of an inertial navigation system combined with control mechanisms, allowing the path of a vehicle to be controlled according to the position determined by the inertial navigation system. Table of contents showTocToggle("show","hide") 1 Overview 2 Inertial navigation systems in detail 3 Schemes 3.1 Gyrostabilized platforms 3.2 Rate Gyro Systems 3.3 Laser Gyros 3.4 Brandy Snifter Gyros 3.5 Quartz Rate Sensors 3.6 Pendular Accelerometers 3.7 Accelerometer-only Systems Overview Inertial guidance systems were originally developed for the navigation of ICBMs. American rocket pioneer Robert Goddard experimented with rudimentary gyroscopic systems. Dr. Goddard's.
Invincible class aircraft carrier - GAM-B01 guns, which they retain, and the Sea Dart surface-to-air missile. The Sea Dart system has been removed from all ships of the class in order to allow the flight deck to be exptended, and magazines suitable for weapons used by the Harrier GR7 to be added to the ship. Because of lessons learnt during the 1982 Falklands War, CIWS guns were added to the design. Illustrious having them fitted at the last minute before commissioning, Ark Royal had them added as a normal part of the building process, and Invincible had them fitted during her first overhaul after the Falklands. Invincible and Illustrious have three Goalkeeper CIWS systems, whereas Ark Royal has three Phalanx CIWS systems. Electronic countermeasures are provided by a Thales jamming sytem and ECM system. Sea Gnat.
Vinnie Colaiuta - memory, b) sight reading some of Frank's newly written orchestral music (which starts with a bunch of crazy 11 groupings) and c) jamming with Frank's band in 21/16 time. He replaced Terry Bozzio..
Irish bowline - 'King of Knots'. Related knot(s): double bowline, spanish bowline,triple bowline,portuguese bowline, bowline on a bight Releasing: Non-jamming. Efficiency: 60-75% Caveats: None. Comments: The knot is a combination of the cow hitch and the overhand knot.(see knot) The knot is symmetrical and easy to tie. The difference between the bowline and a loop knot is the ease of untying; the bowline is easy to untie. The loop knot is stronger about 80-90% but is hard to untie. Structure: Symmetrical Tying: This knot can be tied in two ways. First tie a cow hitch then cross the end over the standing part to form a pretzel. Second step viewing the knot from the side move the end under the knot to the back then through the middle of the cow hitch to the.
Israeli attack on USS Liberty - unable to see what was being sent. One of Liberty's machine gun mounts opened fire on the torpedo boats (without receiving appropriate orders). This resulted in the torpedo boats' aproaching to within 500 yards of Liberty and launching two torpedoes (the 1982 IDF History Department report claims that 5 torpedoes were launched). Only one hit Liberty on the starboard side, forward of the superstructure, creating a great hole, and resulting in the majority of the casualties for the incident. After a while (see below for the disputed details), the boats withdrew from the area. Then they have returned with an offer of help; it was refused by the American ship. About three hours after the attack, an American representative was notified about it. He then approached the ship on an Israeli.
Hangman's noose - end. Origin: Ancient. Related knots: Releasing: Non-jamming. Efficiency: Unknown%. Caveat: Never place loop around someones neck. Uses: Traditionally used for executions. Comments: Structure: Tying: article/pictures http://www.geocities.com/roo_two/hangmansnoose.html.
Henschel Hs 293 - "Gustav Schwartz Propellerwerke" glide bomb which was designed in 1939. Varients Hs 293A. The original version Hs 293B was wire guided to prevent jamming; it was never put into production, because jamming was never serious enough to prevent the radio-guided version from being effective. Hs 293C had a detachable warhead (also designated Hs 293A-2) Hs 293D was television-guided. 20 were built and tested. It was never used operationally as it was unreliable. Hs 293E an experimental model with different control surfaces; never put into series production. Hs 293F a tailless varient; never got firther than the design phase. Hs 293H an experimental varient designed to be launched from one aircraft and controlled from another. Hs 293V6 designed for launch from the Arado Ar 234 jet bomber. Inventory Over 1000 were built,.
Vote-rigging - pickers) can be registered to vote, by buying or coercing votes from persons who would not normally vote but who are nevertheless eligible to vote, by subverting voting machines (such as jamming an opponent’s ballot lever or button), or by subverting the vote counting process itself. Such efforts and campaigns can be quite sophisticated, involving court challenges and counter-challenges. Deflating the vote can by accomplished by intimidating voters and preventing them from voting (such as by random violence near polling places or other forms of electioneering), by controlling the ballot counting process, by “losing” or “misplacing” ballot boxes, by disqualifying broad categories of votes on technical grounds (such as requiring signatures on absentee military ballots after they have been cast but before they have been counted), or by “hacking” electronic voting.
HMS Invincible (R05) - The runway is 170 m long and includes the characteristic "ski jump" (initially 7° it was later increased to 12°). For defence the carriers have a number of systems. They have either the Raytheon or the Thales Goalkeeper CIWS; they also have two 20 mm Oerlikons. Countermeasures are provided by a Thales jamming sytem and ECM system, Sea Gnat launchers provide for chaff or flare decoys. Initially the carriers were also armed with a Sea Dart SAM missile system, but these were removed in order to increase the flight deck size and to allow magazine storage for Royal Air Force Harrier GR7s. Length: 209 m Beam: 36.1 m Draught: 8.4 m Displacement: 20,400 Crew: around 1000 including aircrew, can carry an extra 500 soldiers Power: 4 of Rolls Royce Olympus gas.
