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https://goo.gl/images/k2uEmo The French company Dassault Aviation published a video on its YouTube channel showing the fifth-generation European fighter. Military experts believe the new fighter will replace the fourth-generation French Rafale aircraft and the multi-tasked Eurofighter Typhoon. The new fifth-generation aircraft is used as a platform and a basis for the creation of new pilot and unmanned aircraft. The manned version is to become a turning point and control for the unmanned model. Dassault Aviation won the deal to export Rafal fighters to India in 2012, where it participated in the competition American fighter "F / A-18E / F Super Hornet" and "F-16IN Super Viper", Swedish "Gripen NG" and European Common "Typhoon" and Russian "MiG-35".

Damage to the virtual world After the spread of virtual reality glasses "VR" .. Does it have health damage? Virtual reality glasses or VR glasses, with time, are spread among young people and young people, and like anything else that has pros and cons, this is what many studies have addressed. Several European studies have found that there are five side effects that occur in the user's body while wearing virtual reality glasses, including loss of awareness of the place, dizziness, dizziness, confusion, nausea, pain in the eyes and problems of concentration, according to Emirates Today. American, British and German studies were conducted on these glasses, and confirmed that the maximum time allowed for the user to remain in the virtual reality mode is 30 minutes at most, noting that he then needs to take off his glasses and restore the body to nature and reality, and leave it on the mushroom for at least 15 minutes, before deciding to move to virtual reality again. The first study was conducted by a team from the University of Berkeley, led by Professor Marty Banks, a professor of visual and neuroscience at the university, who noted in his study that there are two mechanisms that work together when we look at something in the real world. And subject the two mechanisms to completely different rules in the virtual world, explaining that in the real world, our eyes focus and match and assemble the image when looking at a certain point in the visual space in front of us, and this is a natural reflex. "The distance we have to draw and the distance we have to focus on is absolutely equal. The brain combines these two reactions together, so it is called" the coupling of differentiation by adaptation, "which is logical and natural in our world. With virtual reality glasses, our eyes always focus on a specific point, while trying to veer toward the objects that appear in the near or long term. This mismatch is known as the differentiation conflict by adaptation, which is the reason for the discomfort and discomfort felt by some VR users . The second study, conducted by the University of Leeds, British, warned that the continued use of virtual reality glasses may harm the human eye and balance, unless you make changes to it. Dr. Mark Williams, professor of cognitive psychology at the university, said that glasses and virtual reality devices present a three-dimensional world through a two-dimensional screen, which is a strain on the human vision system. The University of Leeds research included 20 children between the ages of 8 and 12 after playing a 20-minute virtual reality game. The children did not suffer from serious eye deterioration, but two children were confused with the eye About the ability to monitor differences remotely, while another child showed a "sharp deterioration" in the balance of the body immediately after the end of the game. In the study of the University of Mainz, the German researcher, Dr. Michel Madari, found that virtual reality glasses make the person enter the virtual world and indulge in this world and begin to move his body as a virtual body, and when the person moves in this virtual world begins his eyes and body giving him data And other scenes. The three studies recommended several tips to avoid exposure to side effects caused by wearing virtual reality glasses, the most prominent of which are: 1 - not to use glasses for children under 13 years. 2 - Use of glasses carefully and for a short period for those under the age of 20. 3. The maximum time allowed to wear these glasses is 30 minutes. 4. Take a 15-minute break every half hour. 5. Do not listen to loud music while wearing glasses. 6. It is preferable that pregnant women should not use virtual reality glasses.

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