Although an explanation for the phenomenon was not provided until 1919, duralumin was one of the first " age hardening " alloys to be used, and was soon followed by many others.

Although essential amenities, such as running water, furniture and a limited ration of food were provided, luxury items were often forbidden.

Although she was provided with private art lessons, Potter preferred to develop her own style, particularly favouring watercolour.

Although the history of the Big Apple was once thought a mystery, research over the past two decades, primarily by amateur etymologist Barry Popik and Gerald Cohen of Missouri University of Science and Technology, has provided a reasonably clear picture of the term's history.

Although their work was controversial, the American Apollo Moon landings, which were in progress at the time, provided supportive evidence by recognizing the rate of impact cratering on the Moon.

Although WMAP provided very accurate measurements of the great angular-scale fluctuations in the CMB ( structures about as broad in the sky as the moon ), it did not have the angular resolution to measure the smaller scale fluctuations which had been observed by former ground-based interferometers.

Although the fund provided Wheelock ample financial support for the Charity School, Wheelock had trouble recruiting Indians to the institution, primarily because its location was far from tribal territories.

Although contemporary historians vilified Domitian after his death, his administration provided the foundation for the Principate of the peaceful 2nd century.

Although not traditionally played in Canada as it is in Japan, it provided a link to the " homeland ".

Although the German government tried to issue as many of its members as possible with military uniforms of all sort, ranging from field gray to camouflage, these could not be provided to all its members, thus many members of the Volkssturm wore makeshift paramilitary uniforms or uniforms from their civilian jobs ( such as train conductors of the Reichsbahn ).

Although Zurvanism had died out by the 10th century the critical question of the " twin brothers " mentioned in Yasna 30. 3 remained, and Haug's explanation provided a convenient defence against Christian missionaries who disparaged the Parsis ( Indian Zoroastrians ) for their ' dualism '.

Although siblinghood is symmetric ( if A is a sibling of B, then B is a sibling of A ) and transitive on any 3 distinct people ( if A is a sibling of B and C is a sibling of B, then A is a sibling of C, provided A is not C ( Note that " is a sibling of " is NOT a transitive relation, since A R B, and B R A implies A R A by transitivity )), it is not reflexive ( A cannot be a sibling of A ).

Although flawed, Kempe's original purported proof of the four color theorem provided some of the basic tools later used to prove it.

Although silk was a somewhat expensive medium to paint upon in the past, the invention of paper during the 1st century AD by the Han court eunuch Cai Lun provided not only a cheap and widespread medium for writing, but also a cheap and widespread medium for painting ( making it more accessible to the public ).

Although hated by the educated in Herat and often accused of human rights abuses, Ismail Khan's regime provided security, paid government employees, and made investments in public services.

Although the first competition had separate sections for Inform and TADS games, subsequent competitions have not been divided into sections and are open to games produced by any method, provided that the software used to play the game is freely available.

Although this offered great opportunities, he recalls in his autobiography that the only equipment provided to him was a blackboard and piece of chalk.

Although later traditions provided details of his reign and death, Kenneth's father Alpin is not listed as among the kings in the Duan Albanach, which provides the following sequence of kings leading up to Kenneth:

Although the nationalistic fervor sweeping French West Africa at this time was largely absent in Mauritania, continuous politicking ( averaging one election every eighteen months between 1946 and 1958 ) provided training for political leaders and awakened a political consciousness among the populace.

Although at present the majority of M & A advice is provided by full-service investment banks, recent years have seen a rise in the prominence of specialist M & A advisers, who only provide M & A advice ( and not financing ).

Although officially denied by the Nigerian government, Nigeria is known to have also provided secret military training at the Kaduna first mechanized army division and provided other material support to Joshua Nkomo and Robert Mugabe's guerrilla forces during the Rhodesian Bush War ( Renamed Zimbabwe in 1979 ) of independence against white minority rule of Prime Minister Ian Douglas Smith which was armed and financed by the regime in South Africa.

Although not specifically Wiccan, one branch of traditional Witchcraft has provided a home for many Neo-Pagan LGBT men and women.

Although exports have provided substantial revenue, self-sustained growth and a more egalitarian distribution of income have proven elusive.

Although freedom of the press and speech are guaranteed, the government maintains its monopoly over television and radio broadcasting.

Although a 1990 law authorizes private radio and television stations, the government has not granted any licenses as of March 1998.

Although they denied wrongdoing, David Sarnoff and RCA managed to get the FCC to move the FM radio spectrum from 42-50 MHz, to 88-108 MHz, while getting new low-powered community television stations allocated to a new Channel 1 in the 44-50 MHz range.

Although Johnson would attest in a 1984 radio interview that the " two tribes " of the song potentially represented any pair of warring adversaries ( giving the examples of " cowboys and Indians or Captain Kirk and Klingons "), the song does contain the line " On the air America / I modelled shirts by Van Heusen ", a clear reference to then US President Ronald Reagan, who had advertised for Phillips Van Heusen in 1953 ( briefly reviving the association in the early 1980s ), and whose first film had been titled Love Is On The Air.

Although Dave Elman was a noted radio host, comedian and ( song ) writer, he also made a name as a hypnotist.

Although the Allies knew from their monitoring of Nazi radio broadcasts that the Germans had some new form of recording technology, the nature was not discovered until the Allies acquired captured German recording equipment as they invaded Europe in the closing of the war.

Although much of the optical and X-ray emission from supernova remnants originates from ionized gas, a great amount of the radio emission is a form of non-thermal emission called synchrotron emission.

Although none of the major opera houses "... use traditional, Broadway-style sound reinforcement, in which most if not all singers are equipped with radio microphones mixed to a series of unsightly loudspeakers scattered throughout the theatre ", many use a sound reinforcement system for acoustic enhancement, and for subtle boosting of offstage voices, child singers, onstage dialogue, and sound effects ( e. g., church bells in Tosca or thunder effects in Wagnerian operas ).

Although the band has received little radio play or mainstream exposure, Phish has developed a large and dedicated following by word of mouth, the exchange of live recordings by trading tapes with other fans and selling over 8 million albums and DVDs in the United States.

Although other forms such as closed-circuit television ( CCTV ) are in use, the most common usage of the medium is for broadcast television, which was modeled on the existing radio broadcasting systems developed in the 1920s, and uses high-powered radio-frequency transmitters to broadcast the television signal to individual TV receivers.

Although Hitler commented on 22 September 1943, that " It is a great load off our minds that we have dispensed with the radio guiding-beam ; now no opening remains for the British to interfere technically with the missile in flight ", about 20 % of the operational V-2 launches were beam-guided.

Although Germany was able to plot a sample of V-1s which had radio transmitters, which confirmed that they had fallen short, the telemetry was disregarded in favour of the human intelligence.

Although 3G ALE is more reliable and has significantly enhanced channel-time efficiency, the existence of a large installed base of 2G ALE radio systems and the wide availability of moderately priced ( often military surplus ) equipment, has made 2G the baseline standard for global interoperability.

( Although the root concepts of QPSK and 4-QAM are different, the resulting modulated radio waves are exactly the same.

Although not usually a factor in the thermal radiation of stars, polarization is also present in radiation from coherent astronomical sources ( e. g. hydroxyl or methanol masers ), and incoherent sources such as the large radio lobes in active galaxies, and pulsar radio radiation ( which may, it is speculated, sometimes be coherent ), and is also imposed upon starlight by scattering from interstellar dust.

Although radio frequency is a rate of oscillation, the term " radio frequency " or its acronym " RF " are also used as a synonym for radio – i. e. to describe the use of wireless communication, as opposed to communication via electric wires.

" Although the band virtually had no support by television or by radio broadcasting in its first four years, Korn would go on to influence Pleymo, Adema, Limp Bizkit, Linkin Park, Slipknot, Evanescence, P. O. D., Cold, Staind, System of a Down, Seether, One Minute Silence, Kittie, Endo, Taproot, Disturbed, Crazy Town, Otep, Hoobastank, Suicide Silence, Emmure, Impending Doom, Five Pointe O, Lacuna Coil, Chris Volz, Videodrone, Theory of a Deadman, Thousand Foot Krutch, Avenged Sevenfold, Breaking Benjamin, Bleed the Sky, Papa Roach, Godsmack, Shinedown, Coal Chamber, Three Days Grace, Flymore, Bring Me the Horizon, Trapt, Molotov and other bands.

Although the term commonly refers to wireless data transfer mechanisms ( e. g. using radio, hypersonic or infrared systems ), it also encompasses data transferred over other media such as a telephone or computer network, optical link or other wired communications like phase line carriers.

Although earlier BBC radio shows such as Much Binding in the Marsh, Take It From Here and Beyond Our Ken had conditioned listeners to a mix of music, sketches and jokes within a 30 minute show, and Round the Horne was also doing this, ISIRTA ( as it was known to its friends ) accelerated the transitions, and it certainly seemed more improvised.

Although many artists that have dominated the hip hop scene in France are of African descent, themes dealing with the intimate connection between France and various African countries tend not to get much promotion on mainstream radio and even less consideration in scholarly research on the subject.

Although explicitly linked with modern views on the likelihood and detectability of extraterrestrial civilizations, Drake started his career undertaking radio astronomical research at the National Radio Astronomy Observatory ( NRAO ) in Green Bank, West Virginia, and later the Jet Propulsion Laboratory.