Time–frequency analysisIn signal processing, time–frequency analysis comprises those techniques that study a signal in both the time and frequency domains simultaneously, using various time–frequency representations. Rather than viewing a 1-dimensional signal (a function, real or complex-valued, whose domain is the real line) and some transform (another function whose domain is the real line, obtained from the original via some transform), time–frequency analysis studies a two-dimensional signal – a function whose domain is the two-dimensional real plane, obtained from the signal via a time–frequency transform.
ForceIn physics, a force is an influence that can cause an object to change its velocity, i.e., to accelerate, unless counterbalanced by other forces. The concept of force makes the everyday notion of pushing or pulling mathematically precise. Because the magnitude and direction of a force are both important, force is a vector quantity. It is measured in the SI unit of newton (N) and often represented by the symbol F.
Applied physicsApplied physics is the application of physics to solve scientific or engineering problems. It is usually considered a bridge or a connection between physics and engineering. "Applied" is distinguished from "pure" by a subtle combination of factors, such as the motivation and attitude of researchers and the nature of the relationship to the technology or science that may be affected by the work.
AutosuggestionAutosuggestion is a psychological technique related to the placebo effect, developed by pharmacist Émile Coué at the beginning of the 20th century. It is a form of self-induced suggestion in which individuals guide their own thoughts, feelings, or behavior. The technique is often used in self-hypnosis. Émile Coué identified two very different types of self-suggestion: intentional, "reflective autosuggestion": made by deliberate and conscious effort, and unintentional, "spontaneous auto-suggestion": which is a "natural phenomenon of our mental life .
Xbox 360 controllerThe Xbox 360 controller is the primary game controller for Microsoft's Xbox 360 home video game console that was introduced at E3 2005. The Xbox 360 controller comes in both wired and wireless versions. The Xbox controller is not compatible with the Xbox 360. The wired and wireless versions are also compatible with Microsoft PC operating systems, such as Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10, and Windows 11. The wireless controllers run on either AA batteries or a rechargeable battery pack.
HypnosisHypnosis is a human condition involving focused attention (the selective attention/selective inattention hypothesis, SASI), reduced peripheral awareness, and an enhanced capacity to respond to suggestion. There are competing theories explaining hypnosis and related phenomena. Altered state theories see hypnosis as an altered state of mind or trance, marked by a level of awareness different from the ordinary state of consciousness.
