CHAOS IN DYNAMIC HANDWRITTEN SIGNATURE

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RASHIDI SAEID; FALLAH ALI; TOWHIDKHAH FARZAD

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Seminar Paper

Paper Information

Seminar: IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING
Year:2012 | Issue:19

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Title

CHAOS IN DYNAMIC HANDWRITTEN SIGNATURE

Author(s)

RASHIDI SAEID | FALLAH ALI | TOWHIDKHAH FARZAD

Keywords

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Abstract

SIGNATURE IS A PHYSICAL DEMONSTRATION OF COMPLEX MOTOR PROCESSES. THE PROBLEM, GENERALLY STATED, IS HOW RELATIVE SIMPLICITY IN BEHAVIOR EMERGES FROM THE CONSIDERABLE COMPLEXITY OF THE PERCEPTION-ACTION SYSTEM THAT PRODUCES THE BEHAVIOR WITHIN AN INFINITELY VARIABLE BIOMECHANICAL AND ENVIRONMENTAL CONTEXT. TO SOLVE THIS PROBLEM, WE PRESENT EVIDENCES THAT INDICATE MOTOR CONTROL DYNAMIC IS CHAOTIC PROCESS. THIS CHAOTIC DYNAMIC MAY EXPLAIN A RICHER ARRAY OF TIME SERIES BEHAVIOR IN MOTOR SKILL OF SIGNATURE. IN ORDER TO, NONLINEAR ANALYSIS IS A POWERFUL APPROACH AND SUITABLE TOOL WHICH SEARCH FOR CHARACTERIZING DYNAMICAL SYSTEMS THROUGH CONCEPTS SUCH AS FRACTAL DIMENSION AND LYAPUNOV EXPONENT. SO ADEQUATE DATA SAMPLE FOR NONLINEAR ANALYSIS AND RESULTS MUST BE STABLE AND RELIABLE, WITH CONCATENATION OF 20 SIGNATURE SAMPLES WHICH PROVIDE TIME SERIES LONG ENOUGH. AS A RESULT, THEY CAN BE ANALYZED IN THE HORIZONTAL AND VERTICAL POSITIONS. FROM THE RESULTS, WE OBSERVED A NONINTEGER VALUES FOR THE CORRELATION DIMENSION INDICATING LOW DIMENSIONAL DETERMINISTIC DYNAMICS. THIS RESULT IS CONFIRMED BY USING SURROGATE DATA TESTS. WE ALSO USE THE TIME SERIES TO CALCULATE THE LARGEST LYAPUNOV EXPONENT AND OBTAIN A POSITIVE VALUE. THESE RESULTS MAKE UP IMPORTANT EVIDENCE THAT SIGNATURE DATA IS RESULT OF CHAOS IN A NONLINEAR DYNAMICAL SYSTEM OF MOTOR CONTROL.

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APA: Copy

RASHIDI, SAEID, FALLAH, ALI, & TOWHIDKHAH, FARZAD. (2012). CHAOS IN DYNAMIC HANDWRITTEN SIGNATURE. IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. SID. https://sid.ir/paper/926503/en

Vancouver: Copy

RASHIDI SAEID, FALLAH ALI, TOWHIDKHAH FARZAD. CHAOS IN DYNAMIC HANDWRITTEN SIGNATURE. 2012. Available from: https://sid.ir/paper/926503/en

IEEE: Copy

SAEID RASHIDI, ALI FALLAH, and FARZAD TOWHIDKHAH, “CHAOS IN DYNAMIC HANDWRITTEN SIGNATURE,” presented at the IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. 2012, [Online]. Available: https://sid.ir/paper/926503/en

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