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https://www.youtube.com/watch?hl=en-GB&gl=SG&v=-aliXxhFmd8

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https://www.stem.org.uk/elibrary/resource/31610

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http://academic.uprm.edu/pcaceres/Undergrad/Smart-Alessandra/id19.htm

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Example: Bones mended using Shape Memory Alloys.

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Example: Bones mended using Shape Memory Alloys.

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Broken bones can be mended with shape memory alloys. The alloy plate has a memory transfer temperature that is close to body temperature, and is attached to both ends of the broken bone. From body heat, the plate wants to contract and retain its original shape, therefore exerting a compression force on the broken bone at the place of fracture. After the bone has healed, the plate continues exerting the compressive force, and aids in strengthening during rehabilitation. Memory metals also apply to hip replacements, considering the high level of super-elasticity.
~Aarabi Ahilan

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Example: Self assembly of the smart parts

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Example: Self assembly of the smart parts

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https://www.youtube.com/watch?v=GIEhi_sAkU8

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https://www.youtube.com/watch?v=3Tp6IC_SXu0

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These are artificially created substances that have the built-in ability to repair any damage done to them by themselves.
https://youtu.be/HqW_g9EIBDY

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https://www.youtube.com/watch?v=pqcXsLB8vzE

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https://www.peratech.com/what-is-qtc.html
QTC is a flexible polymer which contains tiny metal particles. It is an insulator, but when pressure is applied, it becomes a conductor and is able to pass very high currents.

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https://www.ted.com/talks/catarina_mota_play_with_smart_materials#t-99904
this link shows many examples and applications of smart material.

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Magnetorheological
A magnetorheological damper or magnetorheological shock absorber is a damper filled with magnetorheological fluid, which is controlled by a magnetic field, usually using an electromagnet.[1][2][3] This allows the damping characteristics of the shock absorber to be continuously controlled by varying the power of the electromagnet.

https://www.youtube.com/watch?v=SBXQ-6uI8GY

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2. provide a video or website link