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Report of Contributions Siam Physics Congress 2017 Report of Contributions https://indico.cern.ch/e/spc2007.physics.ku.ac.th Siam Physics Co … / Report of Contributions Non-Contact Radius Measurement … Contribution ID: 4 Type: Oral Non-Contact Radius Measurement Method of Spherical Standards Thursday, 25 May 2017 09:05 (15 minutes) The diameter measurement of sphere is very important in dimensional metrology. The measure- ment of diameter is generally carried out by a comparison method or direct method using 1D linear measuring system. The probes touch both sides of the workpiece and the diameter is determined from displacement of the probes. The contact force is generally operated at 1N which yield defor- mation due to force of approximately 1 µm with uncertainty of ±0.1 µm. This system provides good performance but has a limitation when workpiece is made from soft matter or sensitive to scratch. National Institute of Metrology (Thailand) developed a laser interferometer system which is equipped with reference spherical lens in order to non-contact radius measurement of spherical objects pos- sible. Radius of completed sphere and partial sphere with radius range from 1 mm up to 50 mm can be measured with accuracy of ±2 µm. Primary author: BUAJARERN, jariya (National Institute of Metrology (Thailand)) Co-authors: Mr TONMUEANWAI,Anusorn (National Institute of Metrology (Thailand)); Dr CHANTA- WONG, Narin (National Institute of Metrology (Thailand)); Mr MUAKNGAM, Yodying (Natonal Insti- tute of Metrology (Thailand)) Presenter: BUAJARERN, jariya (National Institute of Metrology (Thailand)) Session Classification: A8: Instrument I Track Classification: Instrumentation, Metrology and Standards October 2, 2021 Page 1 Siam Physics Co … / Report of Contributions Quantum reflection in the linearly … Contribution ID: 5 Type: Poster Quantum reflection in the linearly downward potential Wednesday, 24 May 2017 15:45 (15 minutes) In this work, the motion of a particle in one dimension, under the influence of the potential well that is modeled as the linear downward of length L with a finite depth jV0j; is studied within the context of the non-relativistic quantum mechanics. The attention is paid on the paradoxical phe- nomenon of the reflection of a particle that is in contrast between classical and quantum physics. Classically, the reflection effect occurs only at a potential barrier. To demonstrate such counterintuitive phenomenon, the Schro¨dinger equation is solved to obtain the reflection coefficient in the scattering state by considering an incident particle withan energy E > 0; that is represented by a monochromatic plane wave, propagates freely from left to right, pass through the potential well. The continuity conditions at boundaries give the desired result that is expressed in terms of the Airy functions which depends on the incident energy E; the strength jV0j and the range L of the well. The value of the reflection coefficient R lies in the interval 0 ≤ R < 1; and its behavior is the decreasing function with respect to the range L: Primary authors: Mr CHAMNAN, Noppasin (Burapha University); Dr KRUNAVAKARN, Boonlit (Burapha Univesity) Presenters: Mr CHAMNAN, Noppasin (Burapha University); Dr KRUNAVAKARN, Boonlit (Burapha Univesity) Session Classification: Poster Presentation I Track Classification: Physics Education October 2, 2021 Page 2 Siam Physics Co … / Report of Contributions Simple Harmonics Motion experim … Contribution ID: 6 Type: Poster Simple Harmonics Motion experiment based on LabVIEW interface with Arduino Wednesday, 24 May 2017 15:45 (15 minutes) In this work, we developed an innovative physics lab apparatus that is modern, cheap and simple. The ultrasonic sensor was used to measure the position of a mass attached on a spring asafunc- tion of time. The data acquisition system and control device were developed based on LabVIEW interface with Arduino. The experimental was designed to explain the simple harmonics motion similar to the wave propagation. The simple harmonic system (mass and spring) was observed and the motion can be realized using curve fitting to the wave equation in Mathematica. We found that the spring constants provided by Hook’s law and the wave equation fitting are in good agreement. Primary author: Dr TONG-ON, Anusorn (Chiang Rai Rajabhat University) Co-authors: SAPHET, Parinya (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat Univer- sity) Presenters: Dr TONG-ON, Anusorn (Chiang Rai Rajabhat University); SAPHET, Parinya (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat University) Session Classification: Poster Presentation I Track Classification: Physics Education October 2, 2021 Page 3 Siam Physics Co … / Report of Contributions One dimensional two-body collisio … Contribution ID: 7 Type: Poster One dimensional two-body collisions experiment based on LabVIEW interface with Arduino Wednesday, 24 May 2017 15:45 (15 minutes) The purpose of this work is to build a physics lab apparatus that is modern, low-cost andsimple. In one dimensional two-body collisions experiment, we used the Arduino UNO R3 as a data acqui- sition system which was controlled by LabVIEW program. The photo gate sensors were designed using LED and LDR to measure position as a function of the time. Aluminum frame housewares and blower were used for the air track system. In both totally inelastic and elastic collision ex- periments, the results of momentum and energy conservation are in good agreement with the theoretical calculations. Primary author: SAPHET, Parinya (CRRU) Co-authors: Dr TONG-ON, Anusorn (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat University) Presenters: SAPHET, Parinya (CRRU); Dr TONG-ON, Anusorn (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat University) Session Classification: Poster Presentation I Track Classification: Physics Education October 2, 2021 Page 4 Siam Physics Co … / Report of Contributions A novel spectrometer based on the … Contribution ID: 8 Type: Poster A novel spectrometer based on the near-field Talbot effect Wednesday, 24 May 2017 15:45 (15 minutes) By making use of advanced technique of the near-field Talbot effect, we design a novel spectrom- eter. Our method provides a compact and portable spectrometer according to the characteristic of the Talbot effect. Here, we propose the idea with the simulations done with reasonable values. With vibration and temperature adjustments, the high resolution over a range of a few nanometers can be obtained. Primary authors: Mr SUTHAM, Withun (Department of Physics, Faculty of Science, Burapha Uni- versity, ChonBuri Province, 20131, Thailand); Dr SRISUPHAPHON, Sorakrai (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thailand); Dr WONGRACH, Kuna- ree (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thai- land); Dr DEACHAPUNYA, Sarayut (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thailand) Presenter: Mr SUTHAM, Withun (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thailand) Session Classification: Poster Presentation I Track Classification: Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena October 2, 2021 Page 5 Siam Physics Co … / Report of Contributions Effects of Relaxation on Drag Forc … Contribution ID: 9 Type: Oral Effects of Relaxation on Drag Force and Diffusivity of Highly Charged Spherical Particles in Cylindrical Pores Wednesday, 24 May 2017 13:30 (15 minutes) Diffusion of macromolecules through nanopores of comparable sizes is affected by an interaction between the particle and the confining entities including both hydrodynamic and electrostatic in- teractions. The particle-pore hydrodynamic interaction causes an increase in the drag force exerted on the particle, resulting in the reduction of its diffusivity. If the particle is charged and submerged in an electrolytic solution, the particle motion creates a distortion of the electrical double layer, resulting in an excess retarding force added to the usual enhanced hydrodynamic drag. This is commonly known as the relaxation effect. In the present work, the excess force due to relaxation was evaluated from the finite element solution of the governing equations including Stokes equa- tion, Poisson’s equation and Nernst-Planck equations. The regular perturbation scheme involving the Peclet number was employed, considering the particle translocation as a perturbation on equi- librium state. The enhanced drag due to relaxation and the particle diffusivity are obtained for spherical particles confined in cylindrical pores where the particle and pore wall are of like charge and the electric potential of the system is high enough that the Poisson-Boltzmann could not be linearized. The obtained results are compared to effects of relaxation on drag force and diffusivity of macromolecules calculated by employing the perturbation involving the dimensionless surface charge density. Primary author: YOOPRASERTCHUTI, Kittipitch Co-author: Dr DECHADILOK, Panadda Presenters: YOOPRASERTCHUTI, Kittipitch; Dr DECHADILOK, Panadda Session Classification: A1: Biological Track Classification: Biological Physics and Biomedical Engineering October 2, 2021 Page 6 Siam Physics Co … / Report of Contributions Confirmation of the relative gravit … Contribution ID: 10 Type: Oral Confirmation of the relative gravity measurement by the absolute gravimeter at NIMT Thursday, 25 May 2017 09:20 (15 minutes) The local gravity measurement using relative
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