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(Nikola Tesla, 1856-1943, born on July 1th, 1856) is a world-renowned inventor, physicist, mechanical engineer and electrical engineer. He was born in Croatia (later merged into the Austrian Empire) of Serbian descent. Tesla is considered as an important inventor in history. His contributions to electricity and magnetism in the late 19th century and early 2th century are also well-known. His patents and theoretical work forms are based on modern alternating current (AC) systems, including multiphase power distribution systems and AC motors, which helped him bring about the second industrial revolution. In the United States, Tesla's reputation in history or popular culture can rival that of any other inventor or scientist. After he demonstrated wireless communication in 1893 and became the winner of the current war, he became one of the greatest electronic engineers in America and was highly respected. Many of his early achievements became pioneers of modern electronic engineering, and many of his discoveries were groundbreaking and important. In 1943, the United States Supreme Court recognized him as the inventor of radio. Tesla never cared about his financial situation and died in poverty and oblivion at the age of 86. Tesla's legacy can be seen everywhere in the modern world where electricity is used. Apart from his achievements in electromagnetism and engineering, Tesla is also considered to have contributed to various fields such as robotics, ballistics, information science, nuclear physics and theoretical physics. Tesla was regarded as a mad scientist in his later years and was noticed for claiming that he could create weird scientific inventions. [1][2] Many of his achievements have been applied with some controversies to support many pseudosciences, such as UFO theory and mysterious theory in the new century. Contemporary admirers of Tesla regard him as "the man who created the twentieth century". He is a great man forgotten by the world. He invented the alternator, and Edison loved the DC generator he invented and tried his best to suppress Tesla. Tesla would be the richest man in the world if he hadn't been forced to give up the patent of alternating current for free use ($2.53 per horsepower). His dream is to provide the world with inexhaustible energy. He lived a miserable life and sympathized with him very much, but he was a peerless genius. Unfortunately, not many people remembered him. On July 1th, 1856, he was born in Smilian, Croatia, Yugoslavia. His father was a priest and his mother was the inventor of the eggbeater. There are countless inventions in his life. In 1882, shortly after Edison invented direct current (DC), he invented alternating current (AC), made the world's first alternator, and founded multiphase power transmission technology. In 1895, he made generator sets for Nicaragua Power Station in the United States, making the power station still one of the world-famous hydropower stations. In 1897, he made Marconi's theory of radio communication a reality. In 1898, he built the world's first radio-controlled ship, and patented the radio-controlled technology (U.S. PatentNo. #613.89). In 1899, he invented X-Ray photography. Other inventions include: radio, radar, fax machine, vacuum tube, neon tube, missile navigation, star defense system, etc. Even the unit of magnetic density named after him (1 Tesla = 1, Gause) shows his contribution to magnetism. When she was young, Tesla was very clever, and she could complete complicated calculations in her mind quickly. The teacher always thought that he was cheating. Tesla can speak many languages fluently. Besides Croatian, he can speak seven languages: Czech, English, French, German, Hungarian, Italian and Latin. Tesla and Mark Twain became close friends in middle age, and they spent a lot of time in the laboratory and other places. Tesla never married because she couldn't handle intimacy. At the age of 4, he said, "Some French actress keeps coming to me, which makes me almost unable to concentrate. It's a pity. Sometimes I feel very lonely. "(A certain French act trying to come to me and made impossible for me to concentrate. It's pitytoo. For Some Times, I feel so lonely.) Although he devoted his life to continuous research and obtained about 1, patented inventions, his life-long research was not for his own benefit. Tesla's most productive creative period was spent in the United States. A large part of them can't be repeated until today. Such as a radiant energy receiver. We know nothing about its working principle except that it is a converter of cosmic ray energy. Unfortunately, his contemporary entrepreneurs took advantage of the genius scientist's love and talent, cheated his research achievements and honors, and became rich because of his inventions. But Tesla is down and out, and has been in financial difficulties for many years. Sometime between the evening of January 5th and the morning of January 8th, 1943, Tesla died of heart failure alone in new york Hotel at the age of 86. Tesla was in debt when he died because he refused to sell his patent for alternating current. Why are such extraordinary scientists forgotten by history? No one has ever told it? Because his unique inventions have made great contributions to mankind, but at the same time, they have prompted many profitable enterprises to close down instantly. Those who suppressed him include Thomas Edison, J. Pierpont Morgan who supported him and abandoned him. After his death, the American government secretly deleted his historical records and reports, and most of his research results were confiscated and included in high-level secrets, so his name was erased.

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