There's a motion sensor in the corner.

Today, low pressure electric arcs are used in many applications.

The sensor is just a little strip of metal in that headband there.

The idea of measuring angles by the length of the arc was already in use by other mathematicians.

To protect against night time cold, drape material over the garden bed.

Due to this angle, blue is seen on the inside of the arc of the primary rainbow, and red on the outside.

An example is a sensor having a switch approximately 1.5 nanometers across, capable of counting specific molecules in a chemical sample.

Uranus has relatively well developed aurorae, which are seen as bright arcs around both magnetic poles.

With the Arab Spring an increasingly distant memory, the instability along this arc is deepening.

Underneath my heel, there is a sensor that detects when my foot leaves the ground what's called the heel lift.

And also, you can tell by eye, by looking at this, that these arcs are not centered on individual galaxies.

Anyone who spends nine minutes watching the video presentation of the Arc will see that its potential is nothing short of breathtaking.

A semantic network, or frame network, is a network which represents semantic relations between concepts.

For example, the same Willard Boyle developed a small light sensor in 1969, during his work in optics.

And we'll place an acoustic tag that says, OMSHARK 10165, or something like that, acoustically with a ping.

On the contrary, in the Sunni arc today, it means a vicious cycle of expanding extremism, rapid population growth, rising unemployment, worsening water shortages, and popular discontent.

And if you walk faster, if I walk faster, it detects what's called the time interval, which is the interval between each heel lift.

Under a different load, it's a different structure. And you can actually exploit that by putting in a very small number of conducting fibers to actually make it a sensor.

Sefr al Hawali, a prominent Saudi Wahhabi cleric, warned of the dangers of the Shia arc following the Shia intifada in Iraq in 1991.

Failure to address the issues and leaders involved risks the creation of an arc of even greater instability running from Jerusalem through Beirut, Damascus, Baghdad and Tehran.

This sensor, although this was not at all the original intention, now serves as an eye to all digital cameras worldwide, and earned him the Nobel physics prize in 2009.

So, examples like Christopher Wren's King's Cross you can see that the structural forces of the vaulting get articulated as lines, so you're really actually seeing the expression of structural force and form.

And then with a lot of effort, after tagging, putting in the computer, making sure the stalk is sticking out so it senses the environment, we send this fish back into the sea.

It's a color sensor that detects the color frequency in front of me and sends this frequency to a chip installed at the back of my head, and I hear the color in front of me through the bone, through bone conduction.

In December 2011, exactly two years after Abbott started feeling unwell, a probe, equipped with a camera, was fed into the cavity between the lining of his chest and the lining of his lung.