Context and question: The difference in the above factors for the case of =0 is the reason that most broadcasting (transmissions intended for the public) uses vertical polarization. For receivers near the ground, horizontally polarized transmissions suffer cancellation. For best reception the receiving antennas for these signals are likewise vertically polarized. In some applications where the receiving antenna must work in any position, as in mobile phones, the base station antennas use mixed polarization, such as linear polarization at an angle (with both vertical and horizontal components) or circular polarization.
What would the antenna you are using take advantage of to allow it to work in multiple locations?
Answer: mixed polarization
Context and question: Relationships between religious groups are generally amicable, although there is some concern among mainstream Muslim leaders[who?] that minority religious groups undermine national unity. There is a concern for religious institutions becoming active in the political sphere. The Islamic Renaissance Party (IRP), a major combatant in the 19921997 Civil War and then-proponent of the creation of an Islamic state in Tajikistan, constitutes no more than 30% of the government by statute. Membership in Hizb ut-Tahrir, a militant Islamic party which today aims for an overthrow of secular governments and the unification of Tajiks under one Islamic state, is illegal and members are subject to arrest and imprisonment. Numbers of large mosques appropriate for Friday prayers are limited and some[who?] feel this is discriminatory.
There is concern among whom that majority religious groups undermine national unity?
Answer: unanswerable
Context and question: The most important existing communal shelters were the London Underground stations. Although many civilians had used them as such during the First World War, the government in 1939 refused to allow the stations to be used as shelters so as not to interfere with commuter and troop travel, and the fears that occupants might refuse to leave. Underground officials were ordered to lock station entrances during raids; but by the second week of heavy bombing the government relented and ordered the stations to be opened. Each day orderly lines of people queued until 4 pm, when they were allowed to enter the stations. In mid-September 1940 about 150,000 a night slept in the Underground, although by the winter and spring months the numbers had declined to 100,000 or less. Noises of battle were muffled and sleep was easier in the deepest stations, but many were killed from direct hits on several stations.
In 1940 how many people were sleeping in the Underground stations?
Answer:
150,000 a night