Browsing by Author "K. Kulsirirat"

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    A comparison of gravitational acceleration measurement methods for undergraduate experiment
    (Institute of Physics Publishing, 2018) N. Suwanpayak; S. Sutthiyan; K. Kulsirirat; P. Srisongkram; C. Teeka; P. Buranasiri; N. Suwanpayak; Department of General Science, King Mongkut's Institute of Technology Ladkrabang, Prince of Chumphon Campus, Chumphon, Thailand; email: ksnathap@gmail.com
    This research aimed to determine the acceleration due to gravity (g), by using the methods of free fall, simple pendulum, physical pendulum and an Atwood's machine in the undergraduate laboratory. The experiments were designed for students to explore, analyze the data and interpreting the results by using the principle of a Physics laboratory. The mean experimental values of acceleration due to the gravity of free fall, simple pendulum, physical pendulum and the Atwood's machine were 9.64 m/s 2 , 9.67 m/s 2 , 10.88 m/s 2 and 10.47 m/s 2 , respectively. � Published under licence by IOP Publishing Ltd.
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    Spin-polarization array generation for spin transport use
    (2011) S. Mitatha; W. Sangiamsak; K. Kulsirirat; C. Teeka; P.P. Yupapin
    Spin-polarization can be formed by the two components of soliton (electromagnetic wave) within the metallic waveguide. Under the resonant condition, the random transverse electric and magnetic fields of the solitons corresponding to the left-hand and right hand photons can be generated. Whenever a photon is absorbed by an object, an angular momentum of either +_ or -_ is imparted to the object, in which two possible spin states known as optoelectronic spins are exhibited. Furthermore, the array of optoelectronic spins, i.e., many particles can be generated and controlled by using the modified add-drop filter, in which the broad spectrum soliton can be generated and used to form large scale spin transport applications. © 2011 World Scientific Publishing Company.