High Quality Content by WIKIPEDIA articles! A radio direction finder (RDF) is a device for finding the direction to a radio source. Due to low frequency propagation characteristic to travel very long distances and "over the horizon", it makes a particularly good navigation system for ships, small boats, and aircraft that might be some distance from their destination (see Radio navigation).
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A radio-controlled glider is a type of radio-controlled aircraft that normally does not have any form of propulsion. They are able to sustain continuous flight by exploiting the lift produced by slopes and thermals, controlled remotely from the ground with a transmitter. They can be constructed from a variety of materials, including wood, plastic, polymer foams, and composites, and can vary in wing loading from very light to relatively heavy, depending on their intended use. International radio-controlled glider competitions are regulated by the Federation Aeronautique Internationale (FAI) although many countries have their own national classes. Данное издание не...
ISBN: 978-6-1312-6220-3
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! The Radio Solar Telescope Network (RSTN) is a network of solar observatories maintained and operated by the U.S.Air Force Weather Agency. The RSTN consists of ground-based observatories in Australia, Italy, Massachusetts, New Mexico and Hawaii. It became apparent in the early 1960s that certain space weather events might interfere with the stated U.S. objective of a manned mission to the moon. In particular, the sun emits continuous electromagnetic energy and electrically charged particles, which can cause disturbances in the near-Earth environment and disrupt satellite communications.Foremost among these concerns was the possibility of a geomagnetic storm of solar origin. Metric Type II radio...
ISBN: 978-6-1313-2360-7
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio-controlled helicopters (also RC helicopters) are model aircraft which are distinct from RC airplanes because of the differences in construction, aerodynamics, and flight training. Several basic designs of RC helicopters exist, of which some (such as those with collective pitch, meaning blades which rotate on their longitudinal axis to vary or reverse lift) are more maneuverable than others. The more maneuverable designs are often harder to fly, but benefit from greater aerobatic capabilities. Flight controls allow pilots to control the collective and throttle (usually linked together), the cyclic controls (pitch and roll), and the tail rotor (yaw). Controlling these in unison enables the...
ISBN: 978-6-1312-6208-1
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radiolinja was a Finnish GSM operator founded on September 19, 1988. On March 27, 1991, the world's first GSM phone call was made in Radiolinja's network. The network was opened for commercial use on July 1, 1991. When Radiolinja launched, Finland's incumbent mobile operator, Telecom Finland (later changed to Sonera, now part of Swedish TeliaSonera) operated a first generation mobile network on the NMT technology. Thus Radiolinja's launch was also the start of mobile telecoms competition in Europe. Several global firsts happened on the Radiolinja network, including the world's first person-to-person SMS text message, sent in 1993; the world's first fixed-mobile service bundle, launched in 1996;...
ISBN: 978-6-1313-6893-6
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio frequency power transmission is the transmission of the output power of a transmitter to an antenna. When the antenna is not situated close to the transmitter, special transmission lines are required. The most common type of transmission line for this purpose is large-diameter coaxial cable. At high-power transmitters, cage lines are used. Cage lines are a kind of overhead line similar in construction to coaxial cables. The interior conductor is held by insulators mounted on a circular device in the middle. On the circular device, there are wires for the other pole of the line. Cage lines are used at high-power transmitters in Europe, like longwave transmitter Topolna,...
ISBN: 978-6-1313-9536-9
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A Radio Atmospheric signal or Sferic (sometimes also spelled "Spheric") is a broadband electromagnetic impulse that occurs as a result of natural atmospheric lightning discharges. Sferics may propagate from their lightning source without major attenuation in the Earth-Ionosphere waveguide, and can be received thousands of kilometers from their source. On a time-domain plot, a sferic may appear as a single high-amplitude spike in the time-domain data. On a spectrogram, a sferic appears as a vertical stripe (reflecting its broadband and impulsive nature) that may extend from a few kHz to several tens of kHz, depending on atmospheric conditions. Sferics received from about two thousand kilometres...
ISBN: 978-6-1313-9951-0
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Radio broadcasting is an audio (sound) broadcasting service, broadcast through the air as radio waves (a form of electromagnetic radiation) from a transmitter to a receiving antenna. Stations can be linked in radio networks to broadcast common programming, either in syndication or simulcast or both. Audio broadcasting also can be done via cable FM, local wire networks, satellite and the Internet. The best known type of radiostation are the ones that broadcast via radiowaves. These include foremost AM and FM stations. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после...
ISBN: 978-6-1304-6324-3
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! The Radio Regulations is an intergovernmental treaty text of the International Telecommunication Union (ITU), the Geneva-based specialised agency of the United Nations which coordinates and standardises the operation of telecommunication networks and services and advances the development of communications technology. Covering both legal and technical issues, it serves as a supranational instrument for the optimal international management of the radio spectrum. The Radio Regulations define: * the allocation of different frequency bands to different radio services; * the mandatory technical parameters to be observed by radio stations, especially transmitters; * procedures for the coordination...
ISBN: 978-6-1313-3394-1
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Radio-controlled (or R/C) cars are usually categorized as either "toy" or "hobby" grade. Remote control vehicles are usually of one of two types: control of a vehicle by radio transmission or by a wire connecting between the transmitter and car. This article focuses on the radio-controlled vehicle category, both toy and hobby grades. Cars are powered by various sources. Electric cars are powered by small but powerful electric motors and rechargeable nickel-cadmium, nickel metal hydride, or lithium polymer cells. There are also brushed or brushless electric motors. Most fuel-powered models use glow plug engines, small internal combustion engines fueled by a special mixture of nitromethane,...
ISBN: 978-6-1303-1736-2
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! The radioisotope rocket is a type of rocket engine that uses the heat generated by the decay of radioactive elements to heat a working fluid, which is then exhausted through a rocket nozzle to produce thrust. They are similar in nature to the nuclear thermal rockets such as NERVA, but are considerably simpler and often have no moving parts. The basic idea is a development of existing radioisotope thermoelectric generator, or RTG, systems, in which the heat generated by decaying nuclear fuel is used to generate power. In the rocket application the generator is removed, and the working fluid is instead used to produce thrust directly. Temperatures of about 1500 to 2000°C are possible in this...
ISBN: 978-6-1313-7100-4
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A radio access network (RAN) is part of a mobile Telecommunication system. It implements a radio access technology. Conceptually, it sits between the Mobile phone, and the core network (CN). The mobile phone is varyingly known as user equipment (UE), terminal equipment, mobile station (MS), etc., depending on the standard. The term RAN is typically used in regards to the GSM, UMTS, and associated family of standards. While there is no direct equivalent in TIA standards such as IS-136 and IS-95, the equivalent would be the air interface of that network, coupled with those components governing the networking of base stations and their connection to the core network. Данное издание...
ISBN: 978-6-1314-0030-8
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! In British English, a radiogram is a now old-fashioned piece of furniture that combined a valve radio and record player. The word radiogram is formed by a combination of the words radio and gramophone. Radiograms reached their peak of popularity in the late 1950's, supported by a rapidly growing interest in records. Originally they were styled in polished wood to blend with the furniture styles of the 1940s and 1950s. Later models took on the modern lines and plastic finish of the 1960s. When valve radio development ended in the early 1960's and transistors began to take over radiograms became obsolete. By the early 1970s, they had been replaced by more compact equipment, such as the Hi-Fi and...
ISBN: 978-6-1313-7300-8
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Frederic P. Miller, Agnes F. Vandome, John McBrewster
Radiobiologie. Rayonnement ionisant, Syndrome d'irradiation aigue, Irradiation, Radioprotection, Radiotherapie, Rayon X, Photon, Neutron, Faibles doses d'irradiation, Cancer, Biologie moleculaire Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1300-1830-6
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! A radio-controlled model (or RC model) is a model that is steerable with the use of radio control. All types of vehicles imaginable have had RC systems installed in them, including cars, boats, planes, and even helicopters and scale railway locomotives. Radio control has been around since Nikola Tesla demonstrated a remote control boat in 1893. World War II saw increased development in radio control technology. The Luftwaffe used controllable winged bombs for targeting Allied ships. During the 1950s pioneering work was done by enthusiastic amateurs to create valve based control units. Originally simple 'on-off' systems, these evolved to use complex systems of relays to control speed and...
ISBN: 978-6-1303-1729-4
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio modems transfer data wirelessly across a range of up to tens of kilometres. Using radio modems is a modern way to create Private Radio Networks (PRN). Private radio networks are used in industrial critical applications, when real-time data communication is needed. Also Radio Data Modem enables user to be independent of telecommunication or satellite network operators. In most cases users use licensed frequencies either in UHF or VHF band. Licensed frequency is reserved for gived user in certain area thus ensuring that there is less likelihood to have radio interference from other RF tranmsmitters. Also licence free frequencies are available in most countries, enabling easy implementation,...
ISBN: 978-6-1313-9224-5
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! RadioDNS is a methodology for radio services that utilises the existing Domain Name System to allow clients to lookup IP-based resources based on their broadcast parameters. The project is an open standard, initially created by a series of broadcasters and manufacturers. The standard supports several radio bearers including VHF/FM, DAB, DRM and AMSS. Using a standardised format a fully qualified domain name (FQDN) is constructed and queried. This returns a CNAME record known as the "authoritative FQDN" which is a domain that represents the requested radio service. From this domain SRV record lookups can be performed to verify the availability and location of various other applications that...
ISBN: 978-6-1312-6029-2
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio spectrum refers to the part of the electromagnetic spectrum corresponding to radio frequencies – that is, frequencies lower than around 300 GHz (or, equivalently, wavelengths longer than about 1 mm). Different parts of the radio spectrum are used for different radio transmission technologies and applications. Radio spectrum is typically government regulated in developed countries, and in some cases is sold or licensed to operators of private radio transmission systems (for example, cellular telephone operators or broadcast television stations). Ranges of allocated frequencies are often referred to by their provisioned use (for example, cellular spectrum or television spectrum)....
ISBN: 978-6-1313-8945-0
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Radio transmitter design is a complex topic which can be broken down into a series of smaller topics. A radio communication system requires two tuned circuits each at the transmitter and receiver, all four tuned to the same frequency. The transmitter is an electronic device which, usually with the aid of an antenna, propagates an electromagnetic signal such as radio, television, or other telecommunications. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1303-1407-1
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Radio Data System, or RDS, is a communications protocol standard for embedding small amounts of digital information in conventional FM radio broadcasts. The RDS system standardises several types of information transmitted, including time, station identification and programme information.Radio Broadcast Data System (RBDS) is the official name used for the U.S. version of RDS. The two standards are only slightly different. The standard began as a project of the European Broadcasting Union (EBU), but has since become an international standard of the International Electrotechnical Commission (IEC). Данное издание не является оригинальным. Книга...
ISBN: 978-6-1304-1125-1
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
A radio-controlled aircraft (often called RC aircraft or RC plane) is a model aircraft that is controlled remotely, typically with a hand-held transmitter and a receiver within the craft. The receiver controls the corresponding servos that move the control surfaces based on the position of joysticks on the transmitter, which in turn affect the orientation of the plane. Flying RC aircraft as a hobby has been growing worldwide with the advent of more efficient motors (both electric and miniature internal combustion or jet engines), lighter and more powerful batteries and less expensive radio systems. A wide variety of models and styles is available. Данное издание не является оригинальным. Книга...
ISBN: 978-6-1303-0151-4
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! The Radio Research Center (RRC) is an agency under Research and Analysis Wing. RRC deals with SIGINT and allied works. Most of its work is classified. Research and Analysis Wing (R Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1313-3224-1
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! In telecommunication and position fixing, the term radio fix has the following meanings: * The locating of a radio transmitter by bearings taken from two or more direction finding stations, the site of the transmitter being at the point of intersection. * The location of a ship or aircraft by determining the direction of radio signals coming to the ship or aircraft from two or more sending stations, the locations of which are known. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1313-9540-6
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Radio Resource Management (RRM) is a control mechanism for the overall system which is being used to manage radio resources in the air interface inside a cellular network. The main objective is to utilize the available spectral resources as efficiently as possible. Our aim is to use them in the best possible way to maximize the performance and spectral efficiency in such a way that we have maximum number of users in our network and Quality of Service (QoS) is up to the mark. In a cellular communication system, a service area or a geographical region is divided into a number of cells and each cell is served by an infrastructure element called the base station which works through a radio interface. The frequency license fees, real estate,...
ISBN: 978-3-8383-0802-9
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