Problem: Please answer a question about the following article about Antenna (radio):
It is possible to use the impedance matching concepts to construct vertical antennas substantially shorter than the 14 wavelength at which the antenna is resonant. By adding an inductance in series with the antenna, a so-called loading coil, the capacitive reactance of this antenna can be cancelled leaving a pure resistance which can then be matched to the transmission line. Sometimes the resulting resonant frequency of such a system (antenna plus matching network) is described using the construct of electrical length and the use of a shorter antenna at a lower frequency than its resonant frequency is termed electrical lengthening.
For use with more than one channel changes are made to increase what property?
A: impedance matching
Problem: Please answer a question about the following article about The Times:
The Times was founded by publisher John Walter on 1 January 1785 as The Daily Universal Register, with Walter in the role of editor. Walter had lost his job by the end of 1784 after the insurance company where he was working went bankrupt because of the complaints of a Jamaican hurricane. Being unemployed, Walter decided to set a new business up. It was in that time when Henry Johnson invented the logography, a new typography that was faster and more precise (three years later, it was proved that it was not as efficient as had been said). Walter bought the logography's patent and to use it, he decided to open a printing house, where he would daily produce an advertising sheet. The first publication of the newspaper The Daily Universal Register in Great Britain was 1 January 1785. Unhappy because people always omitted the word Universal, Ellias changed the title after 940 editions on 1 January 1788 to The Times. In 1803, Walter handed ownership and editorship to his son of the same name. Walter Sr had spent sixteen months in Newgate Prison for libel printed in The Times, but his pioneering efforts to obtain Continental news, especially from France, helped build the paper's reputation among policy makers and financiers.
The Times was founded by what publisher who also was the editor?
A: John Walter
Problem: Please answer a question about the following article about 2008 Sichuan earthquake:
China Mobile had more than 2,300 base stations suspended due to power disruption or severe telecommunication traffic congestion. Half of the wireless communications were lost in the Sichuan province. China Unicom's service in Wenchuan and four nearby counties was cut off, with more than 700 towers suspended.
Besides power disruption, what caused telecommunications to be suspended?
A: traffic congestion
Problem: Please answer a question about the following article about Saint Helena:
The island has two local newspapers, both of which are available on the Internet. The St Helena Independent has been published since November 2005. The Sentinel newspaper was introduced in 2012.
How many local newspapers does the island have?
A:
two