Diabetes Device Many people suffering from diabetes need to…

Diabetes Device

Many people suffering from diabetes need to check their blood glucose levels frequently to avoid the risk of dangerous complications such as a coma or heart attack. This means they need to prick their fingers and produce small drips of blood often multiple times a day. To make this daily chore more pleasant, and possibly eliminate it completely, researchers have developed a wearable device (shown) that uses a special laser technology called Raman spectroscopy to monitor glucose levels in the skin. In a study of healthy people whose glucose levels were tested before and at regular intervals after a glucose drink, measurements with the spectroscopy device were equally as accurate as finger prick tests. If the device can be confirmed as accurate in patients, and can be miniaturised into a continuously wearable form, it may be possible to replace finger prick tests altogether.

Today is World Diabetes Day

Written by Ruth Williams

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Miming Stingers A sting from a bee or wasp can be painful,…

Miming Stingers

A sting from a bee or wasp can be painful, and cause further problems for those with allergies. Yet pain may not be the insect’s intention – at least not at first. Here, a scanning electron microscope zooms in on a stinger from a Vespula vulgaris wasp – its serrated ‘lancet’ ready to poke out and pierce flesh. Computer analysis shows that the stinger has a flexible tip adapted, potentially, to reduce initial pain and shock – giving the insect more time to release its venom for maximum impact. These macabre mechanical insights are guiding the design of new painless ‘microneedles’, flexible at the tip to reduce pain and copying the exact angles of entry used by wasps and bees to deliver chemicals efficiently. Scientists believe different insects, including mosquitos, have other mechanical secrets. Perhaps these will inspire biomimetic devices to treat the exact conditions that bites and stings help to spread.

Written by John Ankers

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Полная Радуга 10.11.2018 Глория над Россией

Source Gloria Full Rainbow on November 10, 2018 Полная Радуга 10.11.2018 Глория над Россией by Weathernature

Полная Радуга
Гло́рия (лат. gloria — украшение; ореол) — оптическое явление в облаках.

Наблюдается на облаках, расположенных прямо напротив источника света. Наблюдатель должен находиться на горе или на самолёте, а источник света (Солнце или Луна) — за его спиной. Так же можно наблюдать на видео или фотографиях снятых с дистанционно пилотируемых летательных аппаратов.

Представляет собой цветные кольца света на облаке вокруг тени наблюдателя. Внутри находится голубоватое кольцо, снаружи — красноватое, далее кольца могут повторяться с меньшей интенсивностью. Угловой размер намного меньше, чем у радуги — 5…20°, в зависимости от размера капель в облаке.

Глория объясняется дифракцией света, ранее уже отражённого в капельках облака так, что он возвращается от облака в том же направлении, по которому падал, то есть к наблюдателю.

Full Rainbow photographer videographer Rassim on November 10, 2018 In an airplane, somewhere of Russia, Ural region. A glory is an optical phenomenon, Полная Радуга Гло́рия (лат. gloria — украшение; ореол) — оптическое явление в облаках. Наблюдается на облаках, расположенных прямо напротив источника света. Наблюдатель должен находиться на горе или на самолёте, а источник света (Солнце или Луна) — за его спиной. Так же можно наблюдать на видео или фотографиях снятых с дистанционно пилотируемых летательных аппаратов. Представляет собой цветные кольца света на облаке вокруг тени наблюдателя. Внутри находится голубоватое кольцо, снаружи — красноватое, далее кольца могут повторяться с меньшей интенсивностью. Угловой размер намного меньше, чем у радуги — 5…20°, в зависимости от размера капель в облаке. Глория объясняется дифракцией света, ранее уже отражённого в капельках облака так, что он возвращается от облака в том же направлении, по которому падал, то есть к наблюдателю.

Full Rainbow
photographer videographer Rassim
on November 10, 2018
In an airplane, somewhere of Russia, Ural region.
A glory is an optical phenomenon, resembling an iconic saint’s halo around the shadow of the observer’s head, caused by sunlight or (more rarely) moonlight interacting with the tiny water droplets that compose mist or clouds. The glory consists of one or more concentric, successively dimmer rings, each of which is red on the outside and bluish towards the centre. Due to its appearance, the phenomenon is sometimes mistaken for a circular rainbow, but the latter has a much larger diameter and is caused by different physical processes.
Glories arise due to wave interference of light internally refracted within small droplets.
Depending on circumstances (such as the uniformity of droplet size in the clouds), one or more of the glory’s rings can be visible. The angular size of the inner and brightest ring is much smaller than that of a rainbow, about 5° to 20°, depending on the size of the droplets. In the right conditions, a glory and a rainbow can occur simultaneously.

Like a rainbow, a glory is centered on the antisolar (or, in case of the Moon, antilunar) point, which coincides with the shadow of the observer’s head. Since this point is by definition diametrically opposed to the Sun’s (or Moon’s) position in the sky, it always lies below the observer’s horizon when the Sun (Moon) is up. In order to see a glory, therefore, the clouds or fog causing it must be located below the observer, in a straight line with the Sun/Moon and the observer’s eye. Hence, the glory is commonly observed from a high viewpoint such as a mountain, tall building or from an aircraft. In the latter case, if the plane is flying sufficiently low for its shadow to be visible on the clouds, the glory always surrounds it. This is sometimes called The Glory of the Pilot.

Полная Радуга 10 ноября 2018

Плазменная сфера Радуга 10 ноября 2018