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2. Contact geometry - Wikipedia

   en.wikipedia.org/wiki/Contact_geometry

   In mathematics, contact geometry is the study of a geometric structure on smooth manifolds given by a hyperplane distribution in the tangent bundle satisfying a condition called 'complete non-integrability'. Equivalently, such a distribution may be given (at least locally) as the kernel of a differential one-form, and the non-integrability ...

3. Contact sport - Wikipedia

   en.wikipedia.org/wiki/Contact_sport

   Contact sport. A contact sport is any sport where physical contact between competitors, or their environment, is an integral part of the game. For example, gridiron football. Contact may come about as the result of intentional or incidental actions by the players in the course of play. This is in contrast to noncontact sports where players ...

4. Electrical contact - Wikipedia

   en.wikipedia.org/wiki/Electrical_contact

   An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. [1] Each contact is a piece of electrically conductive material, typically metal. When a pair of contacts touch, they can pass an electrical current with a certain contact resistance, dependent on surface structure ...

5. Contact (geology) - Wikipedia

   en.wikipedia.org/wiki/Contact_(geology)

   Contact (geology) A geological contact is a boundary which separates one rock body from another. [1] A contact can be formed during deposition, by the intrusion of magma, [2] or through faulting or other deformation of rock beds that brings distinct rock bodies into contact. [3]

6. Closed and exact differential forms - Wikipedia

   en.wikipedia.org/wiki/Closed_and_exact...

   Closed and exact differential forms. In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0), and an exact form is a differential form, α, that is the exterior derivative of another differential form β. Thus, an exact form is in the image of d ...

7. Haptic communication - Wikipedia

   en.wikipedia.org/wiki/Haptic_communication

   Haptic communication is nonverbal communication and interaction via the sense of touch. Touch can come in many different forms, some can promote physical and psychological well-being. A warm, loving touch can lead to positive outcomes while a violent touch can ultimately lead to a negative outcome. The sense of touch allows one to experience ...

8. vCard - Wikipedia

   en.wikipedia.org/wiki/VCard

   Standard. RFC 6350. vCard, also known as VCF (Virtual Contact File), is a file format standard for electronic business cards. vCards can be attached to e-mail messages, sent via Multimedia Messaging Service (MMS), on the World Wide Web, instant messaging, NFC or through QR code. They can contain name and address information, phone numbers, e ...

9. Contact improvisation - Wikipedia

   en.wikipedia.org/wiki/Contact_improvisation

   Contact improvisation is a practice of movement research, where improvisation and momentum, relation with gravity and with others are the main focus. This form has been developing internationally since 1972 and it started from the exploration, research and inquiries of Steve Paxton. It involves the exploration of one's body in relation to ...