Context and question: A Yagi-Uda array uses passive elements to greatly increase gain. It is built along a support boom that is pointed toward the signal, and thus sees no induced signal and does not contribute to the antenna's operation. The end closer to the source is referred to as the front. Near the rear is a single active element, typically a half-wave dipole or folded dipole. Passive elements are arranged in front (directors) and behind (reflectors) the active element along the boom. The Yagi has the inherent quality that it becomes increasingly directional, and thus has higher gain, as the number of elements increases. However, this also makes it increasingly sensitive to changes in frequency; if the signal frequency changes, not only does the active element receive less energy directly, but all of the passive elements adding to that signal also decrease their output as well and their signals no longer reach the active element in-phase.
What can take advantage of these elements to add more gain?
Answer: Yagi-Uda array
Context and question: In 2006, Morgan Stanley purchased 20 acres (8.1 ha) directly north of the Showboat Atlantic City Hotel and Casino for a new $2 billion plus casino resort. Revel Entertainment Group was named as the project's developer for the Revel Casino. Revel was hindered with many problems, with the biggest setback to the company being in April 2010 when Morgan Stanley, the owner of 90% of Revel Entertainment Group, decided to discontinue funding for continued construction and put its stake in Revel up for sale. Early in 2010 the New Jersey state legislature passed a bill offering tax incentives to attract new investors and complete the job, but a poll by Fairleigh Dickinson University's PublicMind released in March 2010 showed that three of five voters (60%) opposed the legislation, and two of three of those who opposed it "strongly" opposed it. Ultimately, Governor Chris Christie offered Revel $261 million in state tax credits to assist the casino once it opened. As of March 2011[update], Revel had completed all of the exterior work and had continued work on the interior after finally receiving the funding necessary to complete construction. It had a soft opening in April 2012, and was fully open by May 2012. Ten months later, in February 2013, after serious losses and a write-down in the value of the resort from $2.4 billion to $450 million, Revel filed for Chapter 11 bankruptcy. It was restructured but still could not carry on and re-entered bankruptcy on June 19, 2014. It was put up for sale, however as no suitable bids were received the resort closed its doors on September 2, 2014.
In what year did Morgan Stanley purchase land for a new casino resort?
Answer: 2006
Context and question: With 19.48 inches of rainfall, May 2015 was by far Oklahoma City's record-wettest month since record keeping began in 1890. Across Oklahoma and Texas generally, there was record flooding in the latter part of the month 
When was the most rainfall for Oklahoma city?
Answer:
May 2015