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John Logie Baird FRSE (; 13 August 1888 - 14 June 1946) was a Scottish engineer, innovator, one of the inventors of the mechanical television, demonstrating the first working television system on 26 January 1926, and inventor of both the first publicly demonstrated colour television system, and the first purely electronic colour television picture tube. In 1928 the Baird Television Development Company achieved the first transatlantic television transmission. Baird's early technological successes and his role in the practical introduction of broadcast television for home entertainment have earned him a prominent place in television's history.
The development of television was the result of work by many inventors. Among them, Baird was a prominent pioneer and made major advances in the field. Many historians credit Baird with being the first to produce a live, moving, greyscale television image from reflected light. Baird achieved this, where other inventors had failed, by obtaining a better photoelectric cell and improving the signal conditioning from the photocell and the video amplifier.  Between 1902 and 1907, Arthur Korn invented and built the first successful signal-conditioning circuits for image transmission. The circuits overcame the image-destroying lag effect that is part of selenium photocells. Korn's compensation circuit allowed him to send still fax pictures by telephone or wireless between countries and even over oceans, while his circuit operated without benefit of electronic amplification. Korn's success at transmitting halftone still images suggested that such compensation circuits might work in television. Baird was the direct beneficiary of Korn's research and success.  In his first attempts to develop a working television system, Baird experimented with the Nipkow disk. Paul Gottlieb Nipkow had invented this scanning disc system in 1884. Television historian Albert Abramson calls Nipkow's patent "the master television patent". Nipkow's work is important because Baird and many others chose to develop it into a broadcast medium.  In early 1923, and in poor health, Baird moved to 21 Linton Crescent, Hastings, on the south coast of England. He later rented a workshop in the Queen's Arcade in the town. Baird built what was to become the world's first working television set using items including an old hatbox and a pair of scissors, some darning needles, a few bicycle light lenses, a used tea chest, and sealing wax and glue that he purchased. In February 1924, he demonstrated to the Radio Times that a semi-mechanical analogue television system was possible by transmitting moving silhouette images. In July of the same year, he received a 1000-volt electric shock, but survived with only a burnt hand, and as a result his landlord, Mr Tree, asked him to vacate the premises. Baird gave the first public demonstration of moving silhouette images by television at Selfridges department store in London in a three-week series of demonstrations beginning on 25 March 1925.  In his laboratory on 2 October 1925, Baird successfully transmitted the first television picture with a greyscale image: the head of a ventriloquist's dummy nicknamed "Stooky Bill" in a 30-line vertically scanned image, at five pictures per second. Baird went downstairs and fetched an office worker, 20-year-old William Edward Taynton, to see what a human face would look like, and Taynton became the first person to be televised in a full tonal range. Looking for publicity, Baird visited the Daily Express newspaper to promote his invention. The news editor was terrified and he was quoted by one of his staff as saying: "For God's sake, go down to reception and get rid of a lunatic who's down there. He says he's got a machine for seeing by wireless! Watch him -- he may have a razor on him."

What were his television experiments?

Between 1902 and 1907, Arthur Korn invented and built the first successful signal-conditioning circuits for image transmission.



Answer the question at the end by quoting:

Ban Ki-moon (; Hangul: bangimun; Hanja: Pan Ji Wen ; Korean pronunciation: [pan.gi.mun]; born 13 June 1944) is a South Korean diplomat who was the eighth Secretary-General of the United Nations from January 2007 to December 2016. Before becoming Secretary-General, Ban was a career diplomat in South Korea's Ministry of Foreign Affairs and in the United Nations. He entered diplomatic service the year he graduated from university, accepting his first post in New Delhi, India.
Ban was born on 13 June 1944 in the small farming village of Haengchi, Wonnam Township (-myeon), in Eumseong County, North Chungcheong Province in Korea. His family then moved to the nearby town of Chungju, where he grew up. During Ban's childhood, his father had a warehouse business, but the warehouse went bankrupt and the family lost its middle-class standard of living. When Ban was six, his family fled to a remote mountainside for much of the Korean War. After the war ended, his family returned to Chungju. Ban has said that, during this time, he met American soldiers.  In secondary school (Chungju High School), Ban became a star student, particularly in his studies of the English language. In 1962, Ban won an essay contest sponsored by the Red Cross and earned a trip to the United States where he lived in San Francisco with a host family for several months. As part of the trip, Ban met U.S. President John F. Kennedy. When a journalist at the meeting asked Ban what he wanted to be when he grew up, he said, "I want to become a diplomat."  He received a bachelor's degree in international relations from Seoul National University in 1970, and earned a Master of Public Administration from the John F. Kennedy School of Government at Harvard University in 1985. At Harvard, he studied under Joseph Nye, who remarked that Ban had "a rare combination of analytic clarity, humility and perseverance". Ban was awarded the degree of Doctor of Laws (Honoris Causa) by the University of Malta on 22 April 2009. He further received an honorary degree of Doctor of Laws from the University of Washington in October 2009, an honorary degree of Doctor of Law from the University of Cambridge in February 2016, and an Honorary Doctor of Humane Letters Degree from Loyola Marymount University in April 2016. On 30 August 2016, he was conferred the Honorary Doctor of Letters by National University of Singapore for his lifetime of service to humanity.  In addition to his native Korean, Ban speaks English and French. According to a retired UN official, "one of Ban's biggest handicaps was his lack of fluency in English, which made it difficult for him to win over audiences in the US and elsewhere." There have also been questions, however, regarding the extent of his knowledge of French, one of the two working languages of the United Nations Secretariat.

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