|
Alliss
ALLISS is a somewhat rotatable antenna system for high power shortwave radio broadcasting in the 6 MHz to 26 MHz range. An ALLISS module is a self-contained shortwave relay station that is used for international broadcasting. Background ALLISS is a special design case of HRS type antennas. True ALLISS systems have solid radiators (horizontal radiating elements) versus tensioned flexible (open) radiators found with all other variations of ITU HRS type antennas systems. The name is based on a concatenation of two French towns ALLouis and ISSoudun. Technological ambiguities There are some factors that separate true ALLISS technology from 'run-of-the-mill' rotatable HRS Type antennas. Thales pseudo-ALLISS rotatable antenna designs were procured from other antenna manufacturers that Thales acquired by corporate transactions. Technically only solid radiators distinguish true ALLISS systems from all other rotatable HRS type antennas. Only about 12% (estimate) of all HRS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sistema HR ALLISS
AFK Sistema PAO is a large Russian conglomerate company, founded by Vladimir Yevtushenkov, who was chairman of the corporation's board of directors until 2022. In April, Yevtushenkov's shareholding in Sistema has decreased to 49.2%, and he also stepped down from Sistema's board. Sistema has its headquarters in Moscow. The company's global depository receipts (GDRs) are traded on the London Stock Exchange (ticker symbol ). History In 1993, Evgeny Novitsky and Vladimir Yevtushenkov founded the holding company AFK Sistema, also known as Sistema JSFC, to group together several information technology (IT) and cell phone companies including MTS. Structure Sistema operates a number of consumer service businesses in the areas of: * IT and telecoms — Mobile TeleSystems, Moscow City Telephone Network, SkyLink, Sitronics (formerly known as 'Science Center Concern'), NIIME, Mikron, STROM telecom. * Banking — MTS Bank * E-commerce – Ozon * House-Building and Real Estate — Sistema ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feeder Line (network)
A feeder line is a peripheral route or branch in a network, which connects smaller or more remote nodes with a route or branch carrying heavier traffic. The term is applicable to any system based on a hierarchical network. In telecommunications, a feeder line branches from a main line or trunk line. In electrical engineering, a feeder line is a type of transmission line. In addition Feeders are the power lines through which electricity is transmitted in power systems. Feeder transmits power from Generating station or substation to the distribution points. They are similar to distributors except the fact that there is no intermediate tapping done and hence the current flow remains same at the sending as well as the receiving end. In radio engineering, a feeder connects radio equipment to an antenna, usually ''open wire'' (air-insulated wire line) or twin-lead from a shortwave transmitter. In power engineering, a feeder line is part of an electric distribution network, usually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulse-density Modulation
Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse-code modulation (PCM); rather, the relative density of the pulses corresponds to the analog signal's amplitude. The output of a 1-bit DAC is the same as the PDM encoding of the signal. Pulse-width modulation (PWM) is a special case of PDM where the switching frequency is fixed and all the pulses corresponding to one sample are contiguous in the digital signal. For a 50% voltage with a resolution of 8-bits, a PWM waveform will turn on for 128 clock cycles and then off for the remaining 128 cycles. With PDM and the same clock rate the signal would alternate between on and off every other cycle. The average is 50% for both waveforms, but the PDM signal switches more often. For 100% or 0% level, they are the same. Description In a pulse-den ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amplitude Modulation
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation. AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. This original form of AM is sometimes called double-sideband amplitude modulation (DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the sidebands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abuja
Abuja () is the capital and eighth most populous city of Nigeria. Situated at the centre of the country within the Federal Capital Territory (FCT), it is a planned city built mainly in the 1980s based on a master plan by International Planning Associates (IPA), a consortium of three American planning and architecture firms made up of Wallace, Roberts, McHarg & Todd (WRMT – a group of architects) as the lead, Archisystems International (a subsidiary of the Howard Hughes Corporation), and Planning Research Corporation. The Central Business District of Abuja was designed by Japanese architect Kenzo Tange. It replaced Lagos, the country's most populous city, as the capital on 12 December 1991. Abuja's geography is defined by Aso Rock, a monolith left by water erosion. The Presidential Complex, National Assembly, Supreme Court and much of the city extend to the south of the rock. Zuma Rock, a monolith, lies just north of the city on the expressway to Kaduna. At the 2006 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nigeria
Nigeria ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea to the south in the Atlantic Ocean. It covers an area of , and with a population of over 225 million, it is the most populous country in Africa, and the world's sixth-most populous country. Nigeria borders Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. Nigeria is a federal republic comprising of 36 states and the Federal Capital Territory, where the capital, Abuja, is located. The largest city in Nigeria is Lagos, one of the largest metropolitan areas in the world and the second-largest in Africa. Nigeria has been home to several indigenous pre-colonial states and kingdoms since the second millennium BC, with the Nok civilization in the 15th century BC, marking the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SARFT
The National Radio and Television Administration (NRTA) is a ministry-level executive agency controlled by the Propaganda Department of the Chinese Communist Party (CCP). Its main task is the administration and supervision of state-owned enterprises engaged in the television and radio industries. It directly controls state-owned enterprises at the national level such as China Central Television, China National Radio, and China Radio International, as well as other movie and television studios and other non-business organizations. The administration was formerly known as the State Administration of Press, Publication, Radio, Film and Television from 2013 to 2018, and the State Administration of Radio, Film, and Television from 1998 to 2013. History In 1986 the Ministry of Culture Film Bureau and the Ministry of Radio and Television merged to form the Ministry of Radio, Film and Television. On 25 June 1998 the Ministry of Radio, Film and Television reorganized as the State Admi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuba
Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbean Sea, Gulf of Mexico, and Atlantic Ocean meet. Cuba is located east of the Yucatán Peninsula (Mexico), south of both the American state of Florida and the Bahamas, west of Hispaniola ( Haiti/Dominican Republic), and north of both Jamaica and the Cayman Islands. Havana is the largest city and capital; other major cities include Santiago de Cuba and Camagüey. The official area of the Republic of Cuba is (without the territorial waters) but a total of 350,730 km² (135,418 sq mi) including the exclusive economic zone. Cuba is the second-most populous country in the Caribbean after Haiti, with over 11 million inhabitants. The territory that is now Cuba was inhabited by the Ciboney people from the 4th millennium BC with the Gua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulaibiya
Sulaibiya is a small town in Al Jahra Governorate, Kuwait. It holds the record of for the highest temperature in Asia and third highest in the world. Sulaibiya has two Industrial Areas containing several construction materials industries and a Residential Area consisting of 10 blocks. Towards the end of Sulaibiya, you approach Sulabikat which is closer to the Kuwaiti grand cemetery. Industrial area Wastewater treatment plant As of 2015, the General Electric-built Wasterwater treatment plant in the district waste the world's largest membrane-based water treatment facility handling 600,000 cubic meters of water a day. Tire graveyard The industrial area contains a waste disposal area that includes the world's largest tire dump. It has been under development since at least 2010. In April 2021, a fire was reported at the site. In October 2020 a major tire fire in the graveyard was visible from space, burning 25,000 square meters of the deposit or about 1 million tires. A prev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuwait
Kuwait (; ar, الكويت ', or ), officially the State of Kuwait ( ar, دولة الكويت '), is a country in Western Asia. It is situated in the northern edge of Eastern Arabia at the tip of the Persian Gulf, bordering Iraq to the north and Saudi Arabia to the south. Kuwait also shares maritime borders with Iran. Kuwait has a coastal length of approximately . Most of the country's population reside in the urban agglomeration of the capital city Kuwait City. , Kuwait has a population of 4.45 million people of which 1.45 million are Kuwaiti citizens while the remaining 3.00 million are foreign nationals from over 100 countries. Historically, most of present-day Kuwait was part of ancient Mesopotamia. Pre-oil Kuwait was a strategic trade port between Mesopotamia, Persia and India. Oil reserves were discovered in commercial quantities in 1938. In 1946, crude oil was exported for the first time. From 1946 to 1982, the country underwent large-scale modernization, largely b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voice Of Turkey
Voice of Turkey ( tr, Türkiye'nin Sesi Radyosu) is the international service of Turkish state radio on shortwave, Turksat 3A satellite and the Internet. All the broadcasts are transmitted from single site near Emirler, Ankara Province. (). Current broadcasts The Voice of Turkey broadcasts 24 hours a day, targeting Turkish nationals living abroad and those of Turkish origin. Its schedule mainly includes news, music, educational and cultural programmes. Its transmissions start with a piano tune in the ''hicaz'' makam. Languages The Voice of Turkey broadcasts on a daily basis for a total duration of 58 hours in 27 languages, with each service carrying cultural, music and news programmes: *Arabic * Armenian *Azerbaijani * Bulgarian * Chinese *Dari *English *French * Georgian *German * Hausa * Italian * Japanese * Kazakh * Malay *Pashto * Persian * Russian * Spanish * Swahili * Turkmen * Turkish *Urdu * Uyghur * Uzbek English language broadcast times Correct as of 10 Apri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emirler, Gölbaşı
Emirler is a village in Gölbaşı district of Ankara Province, Turkey. It is at . Distance to Ankara is .The village is situated at the west of the Turkish state highway . There is a short wave radio transmitter of Voice of Turkey Voice of Turkey ( tr, Türkiye'nin Sesi Radyosu) is the international service of Turkish state radio on shortwave, Turksat 3A satellite and the Internet. All the broadcasts are transmitted from single site near Emirler, Ankara Province. (). ... in 5 km West of the village. The population of Emirler is 422 as of 2011. The residents are of Turkmen origin. References {{DEFAULTSORT:Emirler, Golbasi Villages in Gölbaşı District, Ankara Province ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
