Three-dimensional screen on water vapor. Free Technical Library News

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XNUMXD water vapor screen

18.04.2014

Scientists and engineers at the University of Bristol have developed an original desktop display that uses water mist instead of a screen. The display is capable of displaying XNUMXD shapes and could change the way humans and computers interact.

The resolution of the "fog screen" is not high, but it has great potential and is still easier to implement and use than immersive virtual reality technologies.

The new screen is a suspension of tiny drops of water in the air, onto which a three-dimensional or flat image is projected using a projector. Users can not only look at the picture, but also rotate it, drag it, "pass" it to each other with simple hand movements. The screen allows you to display two-dimensional images, while the absence of obstacles for hands facilitates interaction with the picture.

The table itself is a simple structure, consisting of a fog machine (water tank and fans), a projection screen, video cameras and projectors that create a kind of interactive whiteboard on the surface of the table. This board demonstrates two-dimensional images that can be "pulled out" from the screen and "hung" in the air - that is, use the projection on the water mist.

The developers note that their screen facilitates the collaboration of several people who have to exchange various data in the form of tables and three-dimensional images. Users can see each other's activities and quickly communicate the necessary information. Switching between individual and group work is also significantly accelerated. Such opportunities can be useful to the military or employees of emergency response headquarters.

The new desktop display will be presented at the end of April at the international conference ACM CHI 2014.

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Warmer in Europe 02.08.2004

Swiss climatologists from the University of Bern, after analyzing data on summer temperatures in Europe over several centuries, came to the conclusion that since the Middle Ages, the climate of the continent has been steadily warming.

The last 30 years have been the warmest in more than five centuries. Regular and relatively accurate measurements of air temperature have been conducted for only about 150 years, so scientists used indirect evidence, for example, measurements of the width of annual rings on saw cuts of old trees from Scandinavia and the oxygen isotope ratio in Greenland ice cores.

In addition, there are phenological records that were kept in some European monasteries. The monks noted, for example, the time of snow melting, the time of flowering of wild and cultivated plants, the period of ripening and harvesting of grapes. It turns out that the coldest in Europe for 500 years was the winter of 1708/1709, and the warmest was the winter of 1989/1990. The hottest during this period was the summer of 2003, when over 19 thousand people died from the heat in Western Europe.

According to forecasts, such a summer will be repeated on average once every two years. The previous hottest was the summer of 1757, data of temperature measurements made then in Scandinavia and Eastern Europe, including western Russia, have been preserved.

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