中級 113 タグ追加 保存
動画の字幕をクリックしてすぐ単語の意味を調べられます!
単語帳読み込み中…
字幕の修正報告
If you've ever run your fingers over a comfy blanket or buried your face in a fluffy cat after a bad day,
you're familiar with just how nice the sensation of softness can be.
And people are willing to pay for it.
You'll see bed sheets proclaiming the sumptuous goodness of Egyptian cotton
or cashmere scarves retailing for a small fortune.
But why do cashmere and these other soft fabrics feel so soft?!
Well, the answer isn't completely clear, but it seems to involve two main components:
the properties of the material you're touching, and you.
Or rather, your brain.
Fabric hand, or handle, is the term the textile industry uses to describe
the way a fabric feels and moves when you touch it.
For years, scientists who study fabric hand have been trying to relate
the subjective words we use to describe textures, like “soft” or “crisp”, to properties they can actually measure.
And it can get pretty complex.
The feel of the fabric can be influenced not just by the material properties
but also by the way you touch it and whether or not you're actively moving your fingers over the material.
And your definition of “soft” might not match mine, which makes things even more complicated.
Despite this, scientists have pinpointed material properties that could be related to softness.
These can be split into two main groups: how smooth the fabric is,
which includes properties like friction and surface irregularities,
and how easy it is to compress, which includes properties like the flexibility of the fabric.
So a bean bag sofa is soft not only because of its fabric casing,
but also because you can squish it really easily.
But soft doesn't necessarily mean you have the smoothest,
most compressible object in the world.
A 2006 study showed that even though alpaca fiber was 10 times as rigid as wool,
we encounter less friction when touching alpaca, so it feels softer.
So material properties are part of the story, but clearly there's more to it.
And that “more” is in our brains.
We don't understand everything about how it works yet.
But two psychology studies that examined how people rated the softness of compliant objects
may provide clues as to why.
Compliance, which can be measured by compressing an object,
is a way of describing how objects deform when they are subject to forces.
In 1995, scientists found that your perception of softness could be related to the way that
pressure is distributed on your fingers as you move them over an object.
At least in the case of objects with deformable surfaces, not so much for rigid ones.
The researchers performed a series of experiments that involved, among other things,
people using their finger to press down on rubber, and having rubber pressed down on their finger.
The results suggested that tactile information is enough to tell us whether something's soft.
This information is communicated by mechanoreceptors in our skin
that work by sensing differences in pressure on your skin when your finger touches an object.
A study in 2008 extended these findings and found that people tended to rate rubber objects as soft
if they were more compliant or deformable than the human finger,
and hard if they were less compliant.
So whether you're petting your dog or just gliding your hand over a bunch of luxurious cashmere scarfs,
there's actually a lot going on to bring you that lovely experience.
So, cashmere scarves are a treat to touch.
But cream mixing with coffee can be a treat for your eyes.
Just picture it, a nice glass of cold brew with that perfect swirl of cream.
And if you wanted to capture that moment forever,
Skillshare offers a course on how to photograph coffee swirls.
In the class “Cold Brew Coffee Swirl,” Tabitha Park takes you through the whole process,
from choosing the right coffee and cream to editing your shots.
And that's just one of the over 25,000 classes on Skillshare,
which is an online learning community for creators.
Premium members get unlimited access to those classes,
so you can browse them all and find what you need to jumpstart your creativity, or your career.
And right now, the first 500 SciShow subscribers to sign up using the link in the description
will get a 2 month free trial.
So check it out and get learning!
[ ♪ Outro ]
コツ:単語をクリックしてすぐ意味を調べられます!

読み込み中…

What Makes Soft Things Soft?

113 タグ追加 保存
Jessieeee 2019 年 7 月 5 日 に公開
お勧め動画
  1. 1. クリック一つで単語を検索

    右側のスプリクトの単語をクリックするだけで即座に意味が検索できます。

  2. 2. リピート機能

    クリックするだけで同じフレーズを何回もリピート可能!

  3. 3. ショートカット

    キーボードショートカットを使うことによって勉強の効率を上げることが出来ます。

  4. 4. 字幕の表示/非表示

    日・英のボタンをクリックすることで自由に字幕のオンオフを切り替えられます。

  5. 5. 動画をブログ等でシェア

    コードを貼り付けてVoiceTubeの動画再生プレーヤーをブログ等でシェアすることが出来ます!

  6. 6. 全画面再生

    左側の矢印をクリックすることで全画面で再生できるようになります。

  1. クイズ付き動画

    リスニングクイズに挑戦!

  1. クリックしてメモを表示

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔