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! The Radio Science Subsystem (RSS) on a scientific spacecraft uses radio signals to probe a medium such as a planetary atmosphere. The spacecraft transmits a highly stable signal to ground stations, receives such a signal from ground stations, or both. Since the transmitted signal parameters are accurately known to the receiver, any changes to these parameters are attributable to the propagation medium or to the relative motion of the spacecraft and ground station. The RSS is usually not a separate instrument; its functions are usually "piggybacked" on the existing telecommunications subsystem. More advanced systems use multiple antennas with orthogonal polarizations. Radio science is commonly...
ISBN: 978-6-1313-2829-9
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radiolocating is the process of finding the location of something through the use of radio waves. It generally refers to passive uses, particularly radar — as well as detecting buried cables, water mains, and other public utilities. It is similar to radionavigation, but radiolocation usually refers to passively finding a distant object rather than actively one's own position. Both are types of radiodetermination. Radiolocation is also used in Real Time Locating Systems (RTLS) for tracking valuable assets. An object can be located by measuring the characteristics of received radio waves. The radio waves may be transmitted by the object to be located, or they may be backscattered waves (as in...
ISBN: 978-6-1313-6882-0
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! The Radioplane BTT was a family of target drones produced by the Radioplane Company, and later Northrop. The series includes the following designations: * OQ-19 * KD2R Quail * MQM-33 * MQM-36 Shelduck * MQM-57 Falconer In the post-World War II period, Radioplane followed up the success of the OQ-2 target drone with another very successful series of piston-powered target drones, what would become known as the Basic Training Target (BTT) family (the BTT designation wasn't created until the 1980s, but is used here as a convenient way to resolve the tangle of designations). The BTTs remained in service for the rest of the 20th century. Данное издание не является...
ISBN: 978-6-1313-6587-4
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio-controlled drifting refers to the act of drifting with a radio-controlled car (R/C car). R/C cars are equipped with low traction tires to aid in the ease of inducing and maintaining controlled oversteer. Car setups are often modified to allow the car to drift more easily, by replacing motors, shocks, tires, weight balance, brakes, and other factors. R/C drifting is typically performed with four wheel drive (4WD) electric R/C cars, although some practitioners use gas-powered (Nitro) R/C cars and/or rear-wheel drive vehicles. As a hobby, radio-controlled drifting is one of many variations of R/C car types and activities. Informal or formal practice events and competitions are held...
ISBN: 978-6-1312-6227-2
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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! Radio Active is a radio station based in Wellington New Zealand. It was the student radio station for Victoria University of Wellington until it was sold to Radio Active Limited in the late 1990s, it broadcasts in FM on a frequency of 89 MHz. Radio Active is part of the b.net group of radio stations. 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...
ISBN: 978-6-1312-6841-0
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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! 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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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radioimmunodetection is an imaging technique using radiolabeled antibodies. Antibodies (also known as immunoglobulins, abbreviated Ig) are gamma globulin proteins that are found in blood or other bodily fluids of vertebrates, and are used by the immune system to identify and neutralize foreign objects, such as bacteria and viruses. They are typically made of basic structural units—each with two large heavy chains and two small light chains—to form, for example, monomers with one unit, dimers with two units or pentamers with five units. Antibodies are produced by a kind of white blood cell called a plasma cell. Данное издание не является оригинальным....
ISBN: 978-6-1313-7187-5
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A Radio Teleswitch is a device used in the United Kingdom to allow electricity suppliers to switch large numbers of electricity meters between different tariffs, by broadcasting an embedded signal in broadcast radio signals. Radio Teleswitches are also used to switch on/off consumer appliances to make use of cheaper baseload tariffs, such as economy 7. Each of the user companies (The RTS Users, or Service Providers) have their own database on the Central Teleswitch Control Unit (CTCU), which is a HP Integrity computer running OpenVMS on IA64 for reliability and clustering technology to minimise downtime. The database defines how each group of teleswitches belonging to the user-company will...
ISBN: 978-6-1313-8865-1
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Дата выхода: июль 2011
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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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radiofax, also known as weatherfax (portmanteau word from the words "weather facsimile") and HF fax (due to its common use in the short waves), is an analogue mode for transmitting images in grayscale. It was the predecessor to slow-scan television (SSTV). Facsmile machines were used in the 1950's to transmit weather charts across the United States via land-lines first and then internationally via HF radio. Radio transmission of weather charts provides an enormous amount of flexibility to marine and aviation users for they now have the latest weather information and forecasts at their fingertips to use in the planning of voyages. Данное издание не является...
ISBN: 978-6-1313-7485-2
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio over Fiber (RoF) refers to a technology whereby light is modulated by a radio signal and transmitted over an optical fiber link to facilitate wireless access. Although radio transmission over fiber is used for multiple purposes, such as in cable television (CATV) networks and in satellite base stations, the term RoF is usually applied when this is done for wireless access . In RoF systems, wireless signals are transported in optical form between a central station and a set of base stations before being radiated through the air. Each base station is adapted to communicate over a radio link with at least one user's mobile station located within the radio range of said base station. RoF...
ISBN: 978-6-1313-9157-6
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio Electronic Token Block is a system of railway signalling used in the United Kingdom. It is a development of the physical token system for controlling traffic on single lines. On arrival at a "token exchange point", the driver reports his/her position to the signaller by radio and requests the "token" for the next section of line ahead. If the signaller is in a position to do so, he/she will issue the electronic token applicable to the section ahead. Simultaneously, the driver must operate a button on apparatus in the cab to receive the token. The token is then transmitted to the train by radio. The Solid State Interlocking controlling the system prevents the issue of any token permitting...
ISBN: 978-6-1312-9764-9
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Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Radiography is the use of the property of X-rays to cross materials to view inside objects. The impact on society of this technique has also been immense: application fields are medical, non-destructive testing, food inspection, security and archeology.A homogeneous beam of X-rays is produced by an X-ray generator and is projected toward an object. According to the density and composition of the different areas of the object, X-rays are more or less absorbed. They are then captured behind the object by a detector (film sensitive to X-rays or a digital detector) which give a 2D representation of this as if it was semi-transparent. In tomography, the x-ray source and detector move to blur out...
ISBN: 978-6-1304-1190-9
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A radiometer is a device for measuring the radiant flux (power) of electromagnetic radiation. Generally, the term radiometer denotes an infrared radiation detector, yet it also includes detectors operating on any electromagnetic wavelength. A common example is the Crookes radiometer, an early-model device wherein a rotor (with dark and light vanes) in a partial vacuum spins when exposed to light. The Nichols radiometer operates on a different principle and is more sensitive than the Crookes type. A microwave radiometer operates in the microwave wavelengths. The radiometer contains argon gas to enable it to rotate. The MEMS radiometer, invented by Patrick Jankowiak, can operate on the principles...
ISBN: 978-6-1313-6772-4
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Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Radioactive scrap metal is the situation when radioactive material enters the metal recycling process known as the "scrap metal trade". A lost source accident is one where a radioactive object is lost or stolen. Such objects often end up in the scrap metal industry, as people mistake them for harmless bits of metal. The International Atomic Energy Agency has provided guides for scrap metal collectors on what a sealed source might look like. The best known example of this type of event is the Goiania accident, in Brazil. While some lost source accidents have not involved the scrap metal industry, they are still good examples of the likely scale and scope of a lost source accident. For example,...
ISBN: 978-6-1309-1579-7
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio frequency heating is the heating of materials by radio frequency (otherwise called electromagnetic) energy. This can be divided into 3 general categories as below. The term "radio frequency" is misleading - electromagnetic energy of any frequency is absorbed (and reflected) to a greater or lesser degree by all materials. The frequency used for any particular purpose will depend on many things and this is shown below.In general, any material may accept electromagnetic energy but the degree to which that happens is dependent on; * Frequency of the electromagnetic energy, * Intensity of the electromagnetic energy, * Proximity to the source of the electromagnetic energy, * Conducting or non...
ISBN: 978-6-1313-9537-6
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Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! The term ripping (slang term for digital media extraction) can also apply to radio. New software and techniques now makes it possible to extract the songs played on the radio and digitally save them on separate audio tracks. Available techniques make it possible to rip the music from Internet radio broadcasts, satellite radio broadcasts and FM radio broadcasts. Ripping is more than simply recording the audio. The key aspect of ripping is disambiguation. When ripping songs from any source, the songs should be split into separate tracks or files, and the songs should be tagged. Otherwise, you are simply recording or dubbing the audio. Данное издание не является...
ISBN: 978-6-1304-1143-5
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio fingerprinting is a process that identifies a cellular phone or any other radio transmitter by the unique "fingerprint" that characterizes its signal transmission. An electronic fingerprint makes it possible to identify a wireless device by its unique radio transmission characteristics. Radio fingerprinting is commonly used by cellular operators to prevent cloning of cell phones. A cloned cell phone will have a same numeric equipment identity but a different radio fingerprint. Essentially, each transmitter (cell phones are just one type of radio transmitter) has unique rise time signature when first keyed caused by the slight variations of component values during manufacture. Once the...
ISBN: 978-6-1313-9542-0
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A radio frequency upconverter is a device that takes an input of radio frequency energy of a specific frequency range and outputs it on a higher frequency. Likewise, downconverters take an input frequency and reduce it to a lower output frequency. Both converters are commonly used in transverters and satellite communications. Upconverters achieve this frequency conversion via heterodyning, the same principle as modern receivers and transmitters to offset the frequency. Radio frequency (RF) radiation is a subset of electromagnetic radiation with a wavelength of 100 km to 1 mm, which is a frequency of 3 kHz to 300 GHz, respectively. This range of electromagnetic radiation constitutes the radio...
ISBN: 978-6-1313-9535-2
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Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! Radio 702, currently known as Talk Radio 702, is a commercial FM radio station based in Johannesburg, South Africa, broadcasting on FM 92.7 and FM 106 to the greater Gauteng province. The station is also webcast via its website. It claims to be Johannesburg's number one news and talk station, offering news, sport, business and actuality programming and plenty of phone-in debates. 702 also features the Naked Scientist, Dr Chris Smith who takes part in a half hour science phone-in every Friday morning. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения...
ISBN: 978-6-1312-6907-3
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Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! A radio-controlled boat is a boat controlled remotely with radio control equipment. Electric Sport boats are the most common type of boat amongst casual hobbyists. Speeds are far below 15 mph "advertised speeds" and run times are less than 10 minutes between recharge. They are often "toy boats" bought at Model shops and retail outlets and sometimes modified for better performance. Due to quiet running, low speeds and simplicity of electric sports boats their use is common and are widely accepted at local lakes and ponds which is not the case for internal combustion model boats. This has led to the growth of Fast electric. Scale boats are replicas of full-size boats. They can be small enough to...
ISBN: 978-6-1312-6238-8
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Дата выхода: июль 2011