Chaichuay, Chinda

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Chaichuay, Chinda
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chinda.cha@kmitl.ac.th

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    Item type:Publication,
    A new technique for coincidence point theory in metric spaces endowed with graph
    (2019-11-17)
    Chaichuay, Chinda
    ;
    Kangtunyakarn, Atid
    Coincidence theory is a generalization of fixed point theory. There are many researchs combining fixed point theory and graph theory. In this paper, a new type of multi-valued mapping and g-l-graph preserving is proposed to prove a coincidence point theorem on complete metric spaces endowed with a directed graph. Supported examples of there main theorems are also introduced. Main results are sufficiently conditions for finding a vertex in the directed graph such that itself image of the defined surjective mapping is contained in the defined multivalued mapping. The proposed theorem can be apply use to obtain the similar result in a matrix space endowed with a partial order set.
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    Item type:Publication,
    Numerical quadratic interpolation for approximating time of death
    (2018-01-01)
    Chaichuay, Chinda
    ;
    Kongprasert, Wittaya
    ;
    Kruemuen, Apiwat
    ;
    Mataynam, Chitchanok
    ;
    Pochai, Nopparat
    Time is one of the most important factors of consideration in a murder case. It might delicately convict a murderer, break a alibi, alternately dispose of a suspect. If the circumstances surrounding death indicate the possibility of homicide, then both the body and immediate surrounding area become crucial in estimating time of death. Estimating the time of death, especially in cases where there are no witnesses, is critical to the investigation. The governing equation is governed by the Newton's law of cooling that provides the time of death. The Lagrange quadratic interpolation technique is use to fitting the experimental data so as to gives the accurately thermal conductivity. The traditional Newton method is also employed to approximate the solution. The proposed numerical technique gives good agreement estimating time of death.