A new series of cameras from CANON. Free Technical Library News

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New camera series from CANON

10.02.2004

A new series of MV700 camcorders with 800,000-pixel CMOS sensor has been released by Canon.

Despite the almost twenty percent reduction in physical volume, the new camcorders have retained a general external resemblance to the previous line - MV600. The series includes four models: MV750i with 22x optical zoom, MV730i with 20x and two models with 18x optical zoom - MV700i and MV700.

The MV750i and MV730i models have a so-called. "progressive shooting system" - the ability to take still pictures during video shooting and save them in JPEG format to an MMC or SD memory card. The MV750i features a Super Night mode with LED for shooting in total darkness, and a Night+ mode that allows you to turn the LED on and off as you shoot.

All models have a sound filter that removes the noise of the mechanical part of the camera. The new AIF4 DSP chip has replaced the analog AIF3 chip of the MV600 series camcorders. Automatic adjustment of the recording level (ALC / Automatic Level Control), the speaker built into the drive prevents sound distortion when the maximum volume is set.

Models MV750i, MV730i and MV700i are equipped with an analog input and an A/D converter.

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Faux beaver hair 02.11.2016

Scientists at the Massachusetts Institute of Technology (MIT) have developed a wool-like rubber skin to study how it behaves underwater. This work helps to understand why beaver hair is not wetted underwater.

The reason for the study was a problem seen by a group of MIT students in Thailand. Young people are concerned about the health of surfers who are forced to get wet in the water for hours. The idea was to provide them with clothes that do not hold water. Upon returning home, team leader Anette (Peko) Hosoi, professor of mechanics and executive director of the MIT department, instructed the students to look into the matter. It turned out that the skins of beavers and sea otters are the best example to follow. These animals are covered with two types of hairs, long and fine, which cover shorter, thicker hairs called undercoat. Biologists say that long hairs do not allow water to pass into the undercoat. But the mechanism of this phenomenon has not been studied.

Then the students developed an exact copy of beaver hair from artificial materials. Thousands of holes were made in acrylic blocks and polydimethylsiloxane (PDMS) rubber bands were inserted into them. The rubber bands were then lubricated with silicone oil to see how air pockets form when immersed in liquid.

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"We found that the weight of the water pushes the air in, but the viscosity of the liquid resists the flow due to the tubules. Water sticks to these hairs and does not pass down to the skin," the scientists say.

Based on calculations and experiments, scientists have learned to predict how quickly the air layer will surround the wool. Knowing the density and length of the fur, the speed of immersion, now you can create a material for a wetsuit.

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