What happened in science on 5th June??

Science events of 5th June

  AIDS

In 1981, an epidemic, later known as AIDS, was briefly described by Dr. Michael Gottlieb in a newsletter from the American Centers for Disease Control. This was the first notice published on AIDS. Despite the medical profession's refusal to recognize the AIDS crisis, it pursued early cases of immunodeficiency and insisted on publishing its findings. He left UCLA in 1987 to open a private practice, devoting his career to the treatment of AIDS patients and the promotion of AIDS research. He tested the drug AZT on AIDS patients first time.

  Apple II

In 1977, the first personal computer, the Apple II, was sold. This invention was of Steve Wozniak and Steve Jobs. They have 6502 microprocessors, high-res and low-res color clicks, voice, joystick input, and cassette tape I / O capability. They have a total of eight expansion slots to add peri-ferrules. The clock speed is 1MHz and, with Apple's language card installed, the standard memory size is 64kB.
The Apple II was one of the first three major personal computers to emerge in 1977. Despite its high cost, it quickly surpassed the TRS-80 and the Commodore Pete.

  World Environment Day

 In 1974, the first World Environment Day was celebrated with global activities. Every year since then, June 5 has been designated as World Environment Day. This day was chosen as the anniversary of the opening day of the first major conference on environmental issues, the Conference on the Human Environment.

  Conference on the Human Environment

 In 1972, the first major conference on environmental issues was convened in Stockholm, Sweden. The Conference on the Human Environment was organized by the United Nations on June 5-16, 1972. Following a resolution of the US General Assembly (December 15, 1972), the opening day of the conference, June 5, is celebrated every year as World Environment Day.

  Mechanical speech

In the year 1938, the first machine to produce intelligent speech-like sounds was introduced by Bell telephone scientists. Called "Pedro, the Voder," it was presented to the public at the Franklin Institute, Philadelphia, PA. It can also mimic the sounds of various farm animals. Homer Dudley was with inventors Richard Riesz and Stanley Watkins. It was also demonstrated at the 1939 World's Fair in New York. However, for its operation, individuals needed to be well-trained in the use of controls.

  Colorscope

In 1930, the cloroscope was first publicly demonstrated in New York City. He used photocells that reacted to light colors, and could compete with colors more than the human eye. The small electric current generated was enough to run the relay or meter. It was invented by Harold H. Sheldon and Dr. Walter A. Schneider.

 

Liquid air

 In 1878, liquid air obtained at a temperature of -192ºC was exhibited by Professor James Dewar at the Royal Institution, London. His work was developed by Raoul Packet of Geneva (December 1877) and Callett of Perlis (January 1878) after small-scale production of liquid air. In March 1893, Dewar created solid air. He gave six well-known Christmas lectures on "Air: Gases and Liquids" at the Royal Institution on 28 December 1893 and 9 January 1894. They demonstrated many physical properties of liquid air and created solid air at the meeting of Royal Institution on Friday, January 19, 1894.

 Hot air balloon ascent

   In 1783, the first hot air balloon took off - unmanned - for ten minutes. It was built by the French brothers Joseph-Michel and Jack-Otten Montgolfier in their hometown of Ono, France.