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Dr. Edmond Locard (1877–1966) was a pioneer in forensic science who became known as the Sherlock Holmes of Lyon, France. [ 1] He formulated the basic principle of forensic science as: "Every contact leaves a trace". It is generally understood as "with contact between two items, there will be an exchange."
Eye contact occurs when two people or animals look at each other's eyes at the same time. [ 1] In people, eye contact is a form of nonverbal communication and can have a large influence on social behavior. Coined in the early to mid-1960s, the term came from the West to often define the act as a meaningful and important sign of confidence and ...
Contact tracing attempts to find all contacts of a confirmed case, in order to test or monitor them for infection. The goal is to stop the spread of a disease by finding and isolating cases. In public health, contact tracing is the process of identifying people who may have been exposed to an infected person ("contacts") and subsequent ...
A contact force is any force that occurs as a result of two objects making contact with each other. [ 1] Contact forces are very common and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car or kicking a ball are some of the everyday examples where contact forces are at work.
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 ...
Facial expression. A facial expression is one or more motions or positions of the muscles beneath the skin of the face. These movements convey the emotional state of an individual to observers. Facial expressions are a form of nonverbal communication. They are a primary means of conveying social information between humans, but they also occur ...
Battery (crime) Battery is a criminal offense involving unlawful physical contact, distinct from assault, which is the act of creating apprehension of such contact. Battery is a specific common law offense, although the term is used more generally to refer to any unlawful offensive physical contact with another person.
Air kiss, conveys meanings similar to kissing, but is performed without making bodily contact. Blowing a raspberry or Bronx cheer, signifies derision by sticking out the tongue and blowing (linguolabial trill) to create a sound similar to flatulence. Cheek kissing, pressing one's lips to another person's cheek, may show friendship or greeting.