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all images @ carli davidson



Capturing the ridiculous and playful facial expressions of dogs as they furiously attempt to shake water off themselves, the pet portraits by carli davidson are highly entertaining, playful glimpses into typically unseen movement.

Pet supplies for dog training collars or another dog training shock collar , so how about the qi wireless charger or iPhone 5 usb charger? ]]> https://ameblo.jp/petsuppliesnew/entry-11650457523.html Thu, 24 Oct 2013 17:57:25 +0900
Why do we go to sleep? To clean our brains, say US scientists

By Ian Sample, Science correspondent

Scientists in the US claim to have a new explanation for why we sleep: in the hours spent slumbering, a rubbish disposal service swings into action that cleans up waste in the brain.

Through a series of experiments on mice, the researchers showed that during sleep, cerebral spinal fluid is pumped around the brain, and flushes out waste products like a biological dishwasher.

The process helps to remove the molecular detritus that brain cells churn out as part of their natural activity, along with toxic proteins that can lead to dementia when they build up in the brain, the researchers say.

Maiken Nedergaard, who led the study at the University of Rochester, said the discovery might explain why sleep is crucial for all living organisms. "I think we have discovered why we sleep," Nedergaard said. "We sleep to clean our brains."

Writing in the journal Science, Nedergaard describes how brain cells in mice shrank when they slept, making the space between them on average 60% greater. This made the cerebral spinal fluid in the animals' brains flow ten times faster than when the mice were awake.

The scientists then checked how well mice cleared toxins from their brains by injecting traces of proteins that are implicated in Alzheimer's disease. These amyloid beta proteins were removed faster from the brains of sleeping mice, they found.

Nedergaard believes the clean-up process is more active during sleep because it takes too much energy to pump fluid around the brain when awake. "You can think of it like having a house party. You can either entertain the guests or clean up the house, but you can't really do both at the same time," she said in a statement.

According to the scientist, the cerebral spinal fluid flushes the brain's waste products into what she calls the "glymphatic system" which carries it down through the body and ultimately to the liver where it is broken down.

Other researchers were sceptical of the study, and said it was too early to know if the process goes to work in humans, and how to gauge the importance of the mechanism. "It's very attractive, but I don't think it's the main function of sleep," said Raphaelle Winsky-Sommerer, a specialist on sleep and circadian rhythms at Surrey University. "Sleep is related to everything: your metabolism, your physiology, your digestion, everything." She said she would like to see other experiments that show a build up of waste in the brains of sleep-deprived people, and a reduction of that waste when they catch up on sleep.

Vladyslav Vyazovskiy, another sleep expert at Surrey University, was also sceptical. "I'm not fully convinced. Some of the effects are so striking they are hard to believe. I would like to see this work replicated independently before it can be taken seriously," he said.

Jim Horne, professor emeritus and director of the sleep research centre at Loughborough University, cautioned that what happened in the fairly simple mouse brain might be very different to what happened in the more complex human brain. "Sleep in humans has evolved far more sophisticated functions for our cortex than that for the mouse, even though the present findings may well be true for us," he said.

But Nedergaard believes she will find the same waste disposal system at work in humans. The work, she claims, could pave the way for medicines that slow the onset of dementias caused by the build-up of waste in the brain, and even help those who go without enough sleep. "It may be that we can reduce the need at least, because it's so annoying to waste so much time sleeping," she said.

So, how about the dog training shock collar? Maybe you like the best bluetooth headsets!

]]> https://ameblo.jp/petsuppliesnew/entry-11646239081.html Mon, 21 Oct 2013 18:01:53 +0900

電動アシスト自転車は最高だ。一度乗ったら、もう「電動なし」には戻れなくなってしまうほどの楽チンさ。電池の許す限りは、どんな長距離だって、どんな急な坂道だって、電動アシスト自転車ならばへっちゃらだ！

ちなみに電動アシスト自転車の需要が特にある国は、日本、ドイツ、オランダであるらしい。中国の場合は、「電動アシスト」ではなく、モロに「電動自転車」だ。そんななか、インド初の電動自転車がいろいろな意味で独創的すぎてヤバイと静かな話題になっている。

自転車の名前は「ニスタルキヤ（Nisttarkya）」。モーターのパワーは350ワット。36ボルトのバッテリーで動作するという。オレンジ色のフレームと、極太タイヤがカッコイイ……のだが、衝撃的なのは乗車姿勢だ。

なんというか、車体に覆いかぶさるように運転するのである。かなり “本気” のライディングポジションだ。表情も本気（マジ）だ！　ハンドルは前タイヤの両脇についており、ヘッドライトは「頭に巻きつけるタイプ」を使用するらしい。

なお、こちらのニスタルキヤは、まだコンセプトモデルの段階だ。インド初の電動自転車として製品化されることを期待したい。でも、インドのデコボコ道をこれで走ったら……アゴのあたりは大丈夫だろうか。いろいろ心配である。 ]]> https://ameblo.jp/petsuppliesnew/entry-11646231618.html Mon, 21 Oct 2013 17:54:16 +0900