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Taiwan: For the 83rd anniversary of The Happy Station Show we have a contest of a lifetime.
3 prizes will be drawn on a live edition of Happy Station on March 17th between 0200 and 0255UTC. The three prizes are the following.
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USA: RFA Announces its B11 schedule
Hi all: Radio Free Asia announces our B11 broadcast schedule; it goes into effect at 0800 UTC, Sunday, October 30, 2011. Here is the schedule:.
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Brasil: GRÁTIS! eBOOK "Radioamadorismo: Hobby? ou Ciência!"
Caros colegas radioamadores e não radioamadores, quero comentar aqui sobre o meu livro: Radioamadorismo: Hobby? ou Ciência! que foi por mim escrito lá no ido ano de 1997...
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Calendario de bolsillo 2012 de Radio Habana Cuba
Dedicado al 50 aniversario de la Campaña de Alfabetización, el calendario de bolsillo 2012 de Radio Habana Cuba reproduce...
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¿WORLD RADIO TV HANDBOOK 2012 [Paperback]
Publication Date: December 15, 2011 This is the 66th edition of "WRT Handbook" and this great directory continues to offer the most comprehensive guide to broadcasting on the planet....
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Radio Sweden To End Broadcasting In Belarusian as of September 1
martes 30 de junio de 2009
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Etiquetas:
Concurso,
Costa Rica,
Radio Internacional de China
Concurso de conocimientos sobre China reta a costarricenses
26.06.2009 Actualizado a las 16:25:16
SAN JOSE, 25 jun (Xinhua) -- Los costarricenses pondrán a prueba sus conocimientos sobre China en un concurso lanzado hoy como parte de las celebraciones realizadas en torno al segundo aniversario del establecimiento de las relaciones diplomáticas entre ambos países.
La convocatoria "¿Qué conoce de China?" es llevada a cabo por el viceministerio de Juventud de Costa Rica, la Embajada de China en este país centroamericano y la Radio Internacional de China (RIC).
Según el embajador de China en Costa Rica, Wang Xiaoyuan, el espacio tiene como "objetivo profundizar la amistad entre las dos naciones, ampliando los conocimientos del pueblo costarricense sobre China".
El diplomático comentó que se pretende evaluar el dominio de los costerricenses en torno a la situación básica de China y la cooperación bilateral amistosa desarrollada tras el establecimiento de relaciones diplomáticas entre ambas naciones.
El concurso, abierto al público en general y sin requisitos, solicita en su etapa inicial que los concursantes respondan las preguntas de los formularios disponibles en las páginas electrónicas de los organizadores.
Entre los participantes que obtengan los mejores resultados en la primera parte del concurso, se elegirán los finalistas que atenderán las pruebas presenciales y darán como resultado a los dos ganadores de un viaje todo pago a suelo oriental.
Diversas emisoras costarricenses apoyarán la iniciativa mediante la transmisión de programas informativos que ofrecerán insumos básicos a los costerricenses para que puedan fortalecer sus conocimientos sobre el tema.
Fuente: Xinhuanet.com
http://www.spanish.xinhuanet.com/spanish/2009-06/26/content_898623.htm
Embajador del Japón ofreció al gobierno Sistema de Televisión Digital
Etiquetas:
India,
Wireless
Timeline of Wireless Technology
Jayesh Limaye, Jun 19, 2009 1245 hrs IST
Evolution of a 125-year-old technology
What is wireless communication? In layman's language it can be described as using technology to transfer information over a distance without using any wires. Wireless communication is not new and has been in use for well over 125 years now. Through this article we trace the origin of this technology and its evolution to its present form. Here is the timeline of wireless technology.
1887
The principle of wireless communication was presented by German physicist Heinrich Hertz in the year 1887. Hertz demonstrated how electromagnetic waves could be transmitted across free space. This was an expansion of the theory of electromagnetic theory of light put forth earlier by James Maxwell and Michael Faraday. Though Hertz managed to demonstrate it, he never tried to take it any further, even remarking that it would be of no significance.
1893
Nikola Tesla transmits radio waves in St. Louis, Missouri.
1897
Guglielmo Marconi is awarded the British Patent for 'Improvements in transmitting electrical impulses and signals and in apparatus there-for'. What this effectively means is that he was granted the rights to the Radio.
1898
Nikola Tesla demonstrates a remote control boat. It would be amusing to know that people watching this demonstration thought Tesla was controlling the boat using his mind, as nobody seemed to have any information about radio waves at that time.
1906
Amplitide Modulation (AM) is used by Reginald Fessenden to broadcast his voice over the North Atlantic. This mode of radio transmission is the same as Shortwave and Medium wave in use today.
1915
First transatlantic transmission takes place. AT&T achieves this radio transmission from Arlington, Virginia to Paris using the Eiffel Tower to hold the receiving antenna.
1919
Radio Corporation of America (RCA) is incorporated by General Electric (GE) on Oct. 17 specifically to acquire the assets of the wireless radio company American Marconi from British Marconi.
1921
Shortwave (SW) radio is developed. It is called Shortwave because the wavelength of light is shorter than visible light due to the higher frequency. Shortwave Radio (also known as High Frequency or HF radio) has a frequency of 2.310 Megahertz to 25.820 Megahertz. The benefit of Shortwave radio is that the waves can bounce off the ionosphere (the layer of atmosphere consisting of ions or charged particles), enabling transmission to the other side of the world without actually having a direct line of sight.
1931
Frequency Modulation or FM is developed by Edwin H. Armstrong. FM transmission is less prone to noise associated with AM transmission and therefore results in a clearer broadcast. Also, it is possible to transmit stereo signals, making it suitable for musical radio broadcasts.
1982
The GSM (Groupe Special Mobile) group is formed and decides on a digital system for its cellular systems.
1983
After decades of stagnation in wireless communication technology, 802.3 standard is created by IEEE and additions to its specifications are made regularly.
1987
GSM Technical details are worked out in this year. A narrowband time division multiple access (TDMA) system is also planned.
1990
L-band radio is demonstrated (digital radio). The Global Positioning System (GPS) operates in the L-Band. Also, first GSM specifications are released.
1991
The first GSM call is made in Finland (March) on the Radiolinja network, which got its GSM license in 1990. This is the precursor to Wi-Fi developed by NCR Corporation in the Netherlands with speeds up to 1-2 Mb/s.
1992
First GSM network outside Europe network is launched in Australia on April 27 providing service to 53% of the Australian population.
1997
IEEE 802.11 (also known as Wi-Fi) standard is created. This original 802.11 specification has a maximum bandwidth of 2 Mb/s.
1998
The Bluetooth Special Interest Group (SIG) was formed in September of 1998 by Ericsson, Intel, IBM, Toshiba and Nokia. The formal announcement of the SIG takes place next year on May 20, 1999.
1999
IEEE 802.11b is added to the 802.11 standard. Transmission speeds up to 11 Mb/s are possible. Bluetooth 1.0 (IEEE 802.15.1) specification is released. In this, all hardware identifies itself in the handshake process and renders anonymous data reception and transmission impossible. EV-DO (Evolution Data Optimized) is developed by Qualcomm.
2000
The first consumer Bluetooth product - a wireless headset and phone adapter for mobile phones is released by Ericsson.
2001
The first 3G network is commercially launched in September by NTT DoCoMo, Japan. In December, IEEE 802.16 standard, also known as WiMAX, is created.
2002
The first UMTS network is launched allowing high-speed applications such as mobile TV and video calling.
2003
EDGE is deployed by AT&T on Singular network in the USA. IEEE 802.11g is added to the 802.11 standard, allowing transmission speeds up to 54 Mb/s. Bluetooth specification 1.2 is released. This new specification includes Adaptive Frequency-hopping (AFH), which reduces RF interference.
2004
Newest version of IEEE 802.16 is added and it completely changes the WiMAX standard. This has a new scheduling algorithm, which makes WiMAX much more scalable than Wi-Fi. Instead of the random way in which subscribers compete in Wi-Fi, they compete once for a time to call when they connect to the network, thereby reducing collisions when transmission occurs at specified times. Bluetooth specification 2.0 is released. This new specification is not only backward compatible but also introduces Enhanced Data Rate (EDR), which allows transmission of data up to 3 MB/s.
2009
802.11n - the latest in Wi-Fi standards will be formally approved in November 2009 (although devices sporting this standard are already available, they are not necessarily conformant with the final specifications).
Source:
Album Names and Cold War Games: A History of the Numbers Station
 Just about anyone who's heard Wilco's magnum opus Yankee Hotel Foxtrot can remember the song "Poor Places," but not necessarily for the melody, lyrics or Jeff Tweedy's inimitable crooning. No, what sticks out most is the the bone-chilling final 45 seconds of the song, where a woman's voice robotically repeats the words "Yankee. Hotel. Foxtrot." The true nature of those three words is far more eerie and mysterious than a mere disembodied voice repeating a sequence of the NATO alphabet. It's a recording of a numbers station: a broadcast of indeterminate location that transmits coded shortwave radio messages for top-secret purposes. But where did these numbers stations come from, and what's the purpose of their clandestine messages? The recordings are always repeating shortwave transmissions of sequences numbers and letters of a phonetic alphabet, broadcasting on the high and low ends of the frequency dial. Sometimes they delve into even spookier territory: alternating sound tones, recordings of instruments playing, or people speaking seemingly nonsensical word combinations. One transmission was famously bookended by an old-timey rendition of Lincolnshire, UK's unofficial county anthem, "The Lincolnshire Poacher." Numbers stations likely were a response to the advances in code-breaking that forced the participants of the first and second World Wars to figure out new ways of sending coded messages. The World War I-era German magazine Kurzwellenpanorama made mention of an Austrian spy radio station, the earliest known reference to these coded broadcasts. The U.S. and USSR intensified numbers station activity during the Cold War, and they've been in heavy use ever since. Most governments that employ spies are purported to have their own version of a numbers station, and it's theorized they've become a useful tool for drug smugglers, terrorists, and resistance movements around the world. They bear on recent history as well: the high-profile conviction of Walter Kendall Myers for treason involved numbers station transmissions from the Cuban Intelligence Services. These cloak-and-dagger communiqués are still an unacknowledged apparatus of the world's major spy agencies. The closest anyone has ever come to an official acknowledgment of was a 1998 article in the UK's Daily Telegraph, where a representative of Britain's Department of Trade and Treasury was quoted as saying "These [numbers stations] are what you suppose they are. People shouldn't be mystified by them. They are not for, shall we say, public consumption." The truth really is out there, even if the general public may never get a satisfactory answer. Of course, aspiring cryptographers can easily try their hands at decoding these missives: The Conet Project has compiled four CDs worth of numbers stations recordings, available free of charge on their website. And if you have a shortwave radio, you can be DIY about it and scan the airwaves yourself; these numbers stations aren't hidden, just virtually impossible to decode without the corresponding cryptographic cipher key. Since they're such an effective means of sending encoded messages, it's likely the true nature of numbers stations will remain hidden until they've been out of use for a while. In the meantime, we can take comfort that military-industrial complexes the world over helped inspire Jeff Tweedy to make one of the best albums of the last decade. disc 1 disc 2
disc 3
disc 4
Source:  http://www.pastemagazine.com/articles/2009/06/album-names-and-cold-war-games---a-history-of-the.html
Via Yimber Gaviria, Noticias de la Radio |
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