Smartphone Samsung Galaxy A7. Free Technical Library News

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Samsung Galaxy A7 smartphone

12.01.2015

Samsung has officially unveiled the Galaxy A7 smartphone, which was demonstrated earlier at the presentation of the Galaxy A3 and Galaxy A5 models in Malaysia. The device has the thinnest case among manufactured Samsung smartphones - 6,3 mm. For comparison, the thickness of the Galaxy S5 is 8,1 mm, the iPhone 6 is 6,9 mm.

The Samsung Galaxy A7 will be available in two versions: 64-bit Qualcomm Snapdragon 615 SoC and 32-bit Exynos 5430. Both chipsets feature octa-core processors (four 1,5GHz ARM Cortex-A53 cores + four ARM Cortex-A1,0 cores in the Snapdragon 53 and four 615GHz ARM Cortex-A1,8 cores + four 15GHz ARM Cortex-A1,3 cores in the Exynos 7).

Both versions have 2 GB of RAM and 16 GB of flash memory. There is also a slot for microSD memory cards.

The Samsung Galaxy A7 is equipped with a 5,5" HD Super AMOLED display. On the back of the case, there is a 13MP autofocus camera with LED flash and support for 1080p video recording.

There's also a 5MP front-facing selfie camera with support for Wide Selfie and Beauty Face. You can also take selfies with the rear camera thanks to the Rear-Cam Selfie feature.

The smartphone supports Cat networks. 4 LTE. On board the device there are Bluetooth 4.0 wireless adapters, Wi-Fi 802.11 b / g / n, a GPS (A-GPS) / GLONASS receiver, an NFC chip, a Micro-USB 2.0 port, an audio jack, as well as an accelerometer, proximity sensors, ambient light, RGB, Hall effect, digital compass.

The dimensions of the Galaxy A7 case are 151 x 76,2 x 6,3 mm, weight - 141 g. The battery capacity is 2600 mAh. The operating system is Android 4.4 KitKat with TouchWiz UI interface. In the future, the device will receive an update to Android 5.0 Lollipop.

The Galaxy A7 will come in navy blue, white and gold with single and dual SIM slots. The price of the smartphone will be ?509. The novelty will appear on sale at the end of the first quarter of 2015.

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Electronic warfare in the fish kingdom 04.03.2006

Some fish generate a weak electric field that helps them navigate space, detect obstacles, and communicate with their own kind.

However, Apteronotus leptorhynchus also uses its electrical abilities for other purposes: it "jamming" the signals of rivals. When another member of the same species invades a territory that a fish claims to be its own, the knife blower raises the frequency of its discharges to throw off the intruder's navigation system.

This fact was established by American zoologists from the University of San Antonio. They recorded the frequency of electrical signals at the moment when one fish rushed menacingly to another or to a dummy generating electrical signals. Disorienting the opponent, the attacking fish tried to grab him by the tail, in which the electric organ is located near the knife-makers. Such deliberate jamming of other people's signals came as a surprise to scientists.

The Knife Thrower does not store enough energy to shock the victim with an electric shock. Her electrical organ is a system of neurons that generate a signal at a frequency of 600 to 1000 Hz, creating an alternating electric field. If there is an object nearby, the electrical conductivity of which is different from the electrical conductivity of water, the field of the fish changes slightly.

Receptors scattered throughout the body pick up field distortions. Electrical signals are also used by fish to transmit information. By the way, sometimes at night the males "sing" "electric serenades" for the females for hours.

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