Abstracts

MATH-P-04 154

Supply chain network equilibrium model with disaster relief part

Narin Petrot1 and Jittiporn Tangkhawiwetkul2,*
1 Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
2 Department of Mathematics, Faculty of Science and Technology, Pibulsongkram Rajabhat University, Phitsanulok, 65000
* Corresponding author email: [email protected]

In this paper, the supply chain network equilibrium model which composites of the disaster relief part is
constructed. In such model, we consider five tiers of decision makers: manufacturers for sale and donation,
retailers, demand markets who can purchase products, freight service providers who transport the relief items
to demand points, and finally, demand points. The behavior of all decision makers is considered by using the
variational inequality formulation. Furthermore, the qualitative properties and the dynamics of such model are
studied. Finally, we have some numerical supply chain examples.
Keywords: Supply chain network, Variational inequality, Equilibrium model, Qualitative property, Dynamical
system

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MATH-P-05 155

Order Planning using Linear Programming: A case study of online shops

Pronbun Sritajan1 and Kanlaya Boonlha1*
1 Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

Nowadays, online selling business is a very popular business model, because online selling is low cost and
there are many customer groups. This study were to examine the purchase planning by using linear
programming in case of online shops. Conducted a study using data on ordering 9 kinds of products from
online shop and budget for ordering the product 4,500 baht. Set the objective function for maximum profit. The
conditions, factors and constant in the order are fixed. Planning the order with the linear programming model
by simplex method found that the profit derived from the linear programming model calculation was a
significantly between the traditional sales value 0.05.
Keywords : Linear Programming, Online Shop, Simplex Method

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MATH-P-06 156

The Study of Decision making Based on Modified Hurwicz’s Criteria

Wipawee Chanpholngam1 and Kanlaya Boonlha1*
1 Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email : [email protected]

The purpose of this research was to study the modified Hurwicz’s criteria and compare modified Hurwicz’s
criteria with maximax criterion, maximin criterion, minimax regret criterion, Laplace criterion and Hurwicz
criterion. The instruments used were decision making with 4 scenarios. The study revealed that most modified
Hurwicz's criteria provided decisions consistent with the maximin criterion, minimax regret criterion Laplace
criterion and Hurwicz criterion. Except in the range of the coefficient range (  ) equal to 0.00 - 0.30, the
modified Hurwicz's criteria as same as the maximax criterion.
Keywords: Decision making theory, Hurwicz’s criteria, Modified Hurwicz’s criteria

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MATH-P-07 157

Statistical Model for Forecasting Daily New Cases of Corona Virus Disease 2019

Namthip Chantharat and Thipwan Kate-intra*
1 Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

The objective of this research is to construct the model for forecasting daily new cases of Corona virus disease
2019 (COVID-19) patients in United States of America, India, and Worldwide. Using data on daily new cases
of Corona virus disease 2019 from April 1 to October 15, 2020 in the total of 198 days (Worldometers, 2020).
Box-Jenkins method are used with the mean absolute percentage error (MAPE) criterion. The appropriate
model for forecasting the daily number of new cases of COVID-19 are 1) SARIMA(0,1,1)(0,1,1)7 for United States
of America data 2) SARIMA(0,1,1)(0,1,1)7 for India data by using Yt transformed data and 3)
SARIMA(0,1,1)(0,1,1)7 for worldwide data by using ln(Yt ) transformed data.
Keywords : Corona Virus Disease 2019, Daily New Cases, Box-Jenkins Method

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MATH-P-08 158

The study of factors affecting chances of accidental deaths in The New Year festival of
Thailand

Apisak Chairojwattana 1,* and Duangamon Saeoueng1
1 Department of Mathematics, Faculty of Science, Burapha University, Chonburi, 20131
* Corresponding author email: [email protected]

The aim of the research was to the study of factors: age, gender, date of birth, time of accident, the street of
accident, the condition of victims, the vehicle type of the parties of an accident, the enforcement of the alcohol
beverage control and delivery of the victims affecting chances of accidental deaths in the New Year festival of
Thailand. The logistic regression model was used to predict the probability that an accident victim will die during
the New Year festival. Data was collected from 2016 to 2020, 112,370 observations in total. Results show that
the age, gender, date of birth, the street of accident, the condition of victims, the vehicle type of the parties of
an accident, the enforcement of the alcohol beverage control and delivery of the victims affecting chances of
accidental deaths in the New Year festival of Thailand. The classification performance of predicting was
validated by 99.21 percent correctly predicted.
Keywords: 7-dangerous day mortality in the New Year Festival of Thailand, Logistics regression,
Classification

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MATH-P-09 159

Construct the Model for Forecasting Number of Road Accidents in Thailand

Supanee Namkaew 1,* and Thipwan Kate-intra2
1 Department of statistics, Faculty of Science, Naresuan University, Phitsanulok, 65000
2 Innovative Learning Center, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

The research aims to construct the model for forecasting number of road accidents in Thailand. The data used
in this study are the number of road accident in Thailand from January 2009 to December 2019 a total of 132
months by Box-Jenkins method is used with the minimum mean absolute percentage error criterion criterion
equal to 8.368. The appropriate model for forecasting the number of accidents is SARIMA(1, 0,1)(0,1,1)12 . The
regression equation is

Yˆt = 0.970Yt−1 + Yt−12 − 0.970Yt−13 − 0.762at−1 − 0.243at−12 + 0.185at−13

Keywords: Number of accidents, Box-Jenkins method, Mean absolute percentage error

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MATH-P-10 160

Decision Analysis by the Decision Criteria Using Amplitude Model

Kanokporn Kumprakob1 and Kanlaya Boonlha1*
1Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email : [email protected]

Decision Analysis is a tool that helps decision makers to predict future returns. The purpose of this study were
to study the decision making under uncertainty with the amplitude model decision criterion (TAM) and compare
decisions with the maximax criterion, the maximin criterion, the minimax regret criterion, the Laplace criterion,
the Hurwicz criterion. The study concerns decision making with 2 scenarios analyzed. It was found that the
amplitude model provided decision consistent with the maximin criterion, minimax regret criterion, Laplace
criterion. We can conclude that the amplitude model can be used to the decision making in the same way as
the maximin criterion. The research results show that the amplitude model decision criteria correspond to with
the maximax criterion, the minimax regret criterion, the Laplace criterion, the Hurwicz criterion when the
coefficients of the decision criteria with the amplitude model approach 1.
Keywords: Decision making, Amplitude, Decision criteria

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MATH-P-11 161

Analysis of tuberculosis risk areas in Phayao Province

Korya homsombut 1*, Audsadawut Doungkaew2, Ruttana Rittisaeng3, and Manad Khamkong4
1 Department of Statistics, Faculty of Companies, University of Phayao 56000, Thailand
2 Demonstration School of University of Phayao, Phayao 56000, Thailand
3 Department of Statistics Faculty of Science Chiang Mai University, Chiang Mai 50200, Thailand
* Corresponding author email: [email protected]

Tuberculosis (TB) is another public health problem in Phayao Province. There are still old patients who have
been cured or haven’t recovered. It also has a growing number of new cases. This project is intended for study
the incidence of tuberculosis, analysis of the possibility of disease development, analysis of risk areas, and
time-series data analysis which received secondary data from The Ministry Public Health, Phayao. Data were
collected from all tuberculosis patients from 2014 to 2020 separated into 7 districts: Chiang Kham, Chiang
Muan, Phayao, Mae Chai, Chun, Dokkhamtai, and Pong. The study found that Phayao Province has an
increasing number of TB cases and found the most cases in 2020, a total of 644 cases (156.51 disease rate
per 100,000 people). The group with the highest number of patients was 59 elderly people in Muang Phayao
district (59.17 sickness rate per 100,000 people) which tends to increase from 2014 with ready-made computer
programs. Found a tendency to increase. And above the median since 2014, under geographic, environmental
conditions or activity and various policies that don't change much. The increase or decrease in tuberculosis
cases depends on many factors such as the number of people living in the area. Climate Lack of medical
equipment, etc. Analysis of the possibility of TB incidence in 2020 compared with the median of the past five
years (2015 - 2019) showed that there were 3 districts with the highest chance of tuberculosis: Chiang Kham,
Phayao, and Mae Chai. Analysis of risk areas showed that there are 3 high-risk districts: Chiang Kham, Phayao,
and Mae Jai. The analysis of time series data by predicting disease trends in 2027 showed an increasing trend
of patients. Above the median for the past 5 years. From the study, it can be used as a warning and
epidemiological surveillance method for specific measures to prevent and control tuberculosis.

Keywords: TB disease, disease rate, risk area analysis, time series analysis.

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MATH-P-12 162

Factors Affecting the Decision on Buying Behavior Sport Shoes of Undergraduate
Students at Naresuan University

Darawan Sawatnatee1 and Khanittha Tinochai1*
1 Department of Mathematics, Faculty of Science, Naresuan University
Corresponding author, email: [email protected]

The objective of this research is to study factors affecting the decision on buying behavior sport shoes of
student at Naresuan University, behavior of student for decision on buying sports shoes and using sports
shoes. Sample size is students of Naresuan University 400 people which are specified by W.G.Cochran method.
The frequency, percentage, mean, standard deviation and logistic regression analysis are used for data
analysis. The results show that the most students decide to buy sports shoes from the sports shop at
department store. The most of brand for wearing sport shoes is Adidas whereas Nike is favorable brand for
students. Most sports shoes that students buying decision making are about 2,001-2,500 baht/pair. The highest
frequency of wearing sport shoes is 1-2 days/week. The main reason for wearing sports shoes is comfortable
and student can be worn for playing sports/exercise. In addition, there are two factors that affect the decision
to buy sports shoes as follows: average income and service process factors. The logistic regression model can
be predicted accurately by 87.8 percent of the decision on buying behavior sport shoes.
Keywords: Decision on buying behavior; Sport shoes; Binary logistic regression analysis

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MATH-P-13 163

A Comparison of Confidence Intervals for Population Mean in Gamma Distribution

Treephet Phetchatchan1 and Katechan Jampachaisri1*
1 Mathematics Department, Faculty of Science, Naresuan University
Corresponding author, email: [email protected]

This research is aimed to study and compare 6 interval estimation methods; t-statistics method, bootstrap
method based on t-statistics, pseudo standard deviation method, bootstrap method based on pseudo standard
deviation, median absolute deviation method and bootstrap method based on median absolute deviation when
data are distributed as Gamma. The study is performed on 4 levels of sample size; 15, 30, 60 and 150, 3
levels of shape parameter; 5, 10 and 15, 2 levels of scale parameter; 0.20 and 1 at 90%, 95% and 99%
confidence levels. In each situation, data are simulated and repeated 5,000 times. The coverage probability
and average width of confidence interval are considered as criteria of comparison.
The results reveal that with the sample size of 15 and 90% confidence interval t-statistics method and bootstrap
method based on median absolute deviation mostly provides the coverage probability within the assigned
interval, but t-statistics method yields the smallest average width in most cases. For 95% and 99% confidence
interval, bootstrap method based on median absolute deviation mostly provides the coverage probability within
the assigned interval and yields the smallest average width in most cases. When the sample size is 30 or more
in all confidence levels, bootstrap method based on t-statistics yields the smallest average width in most cases.
Keywords: Confidence interval estimation method, t-statistics method, Pseudo standard deviation method,
Median absolute deviation method, Bootstrap method

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MATH-P-14 164

Probability distribution of Solar radiation

Sasikan Danwihan, Paratee Maha and Jutaporn Neamvonk*
1 Department of Mathematics, Faculty of Science, Burapha university, Saensuk, Muang Chon Buri, Chon Buri
 Corresponding author, email: [email protected]

In this research, we investigates probability distribution of solar radiation in eastern provinces, i.e., Prachin Buri,
Trat, Chon Buri, and Sakaeo. The probability distributions studied in this work are normal, lognormal, weibull
and gamma distribution, including 2 component mixture distributions. Anderson-Darling and Akaike information
criterion are applied to test the appropriate distribution to the data. The results show that the solar radiation of
Prachin Buri, Trat and Sakaeo follow 2 component mixture weibull distribution and that of Chon Buri follows 2
component mixture gamma distribution.
Keywords: mixture probability distribution, goodness of fit test, solar radiation

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MATH-P-15 165

Forecasting the Quantity of Thailand's Palm Oil Exportation

Phonnapha Yodthong and Darika Yamrubboon*
1 Departmant of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

The objective of this research is to find an appropriate model for forecasting the quantity of Thailand’s palm oil
exportation by using the classical decomposition method, Holt-Winters’ additive method, and Box-Jenkins
method. Time series data of quantity of Thailand’s palm oil exportation are reported by the Office of Agricultural
Economics from January 2011 to July 2020 as the total of 115 months. The data are divided into two parts.
The first part of the data is used to find the suitable model within different forecasting methods, in which the
data come from the record of January 2011 until December 2019 as the total of 108 months. The second part
of the data is to take the rest of the record which is from January through July 2020 to compare the actual
value with forecast value, the data are used to compare the performance of different models under the lowest
mean absolute percentage error (MAPE). The results show that for all forecasting methods that have been
studied, Box-Jenkins method is the most appropriate for this time series.
Keywords: Forecasting, Palm Oil, Quantity Palm Oil Exportation

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Poster Presentation

กลุ่มท่ี 5
สาขาวิชาคอมพิวเตอร์ เทคโนโลยีสารสนเทศ

วิทยาการขอ้ มลู

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COM-P-01 166

Modeling of millipede rescue robot from the equation of Antheromorpha uncinata motion
by using MATLAB

Suphannika kaewkantha1, Autchariya Chumponlsri 1, Napatsawan Mekvilai1, Thitinun Gas-osoth 1,2, Chayanan Jitmanee 1,3
1 Demonstration School University of Phayao, Phayao 56000, Thailand
2 School of Science, University of Phayao, Phayao 56000, Thailand
3 School of Energy and Environment, University of Phayao, Phayao 56000, Thailand
* Corresponding author email: [email protected]

There are the interesting study of the walking pattern of millipede in biology named Antheromorpha uncinata,
call metachronal wave, these is a semi-circular wave equation from millipede. In this research studied about
the life cycle and behaviours of Antheromorpha uncinata. Due to the data of number of joints, number of leg
and body length which affects the speed of millipede. According to study from reference, the leg position
equation have many factors which influence its gait.The equation of millipede walking was proved and analyzed
by this data. The MATLAB was used for modelling and plotting to compare with other millipedes species. The
results showed that the walking efficiency of millipede is depended on species. The advantage from this model
is that a reference to develop the walking pattern of rescue robot in the future.
Keywords: Antheromorpha uncinate, MATLAB, metachronal wave

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COM-P-02 167

Sedan car Classification by using Convolutional Neural networks

Chompunic Teawcharoenporn , Pipat Jariyayunyong , Thanakrit Kraising , Kitsana Kumphet , Nattapon Kumyaito ,
Winai Wongthai , Thanathorn Phoka , Wansuree Massagram*
Corresponding author, email: [email protected]

The purpose of this study is to effectively classify sedan models using Convolutional Neural Networks. Dataset
used depicts sedans with a 360° view. Twenty-three sedan models (23 classes), selected from the number of
commercially available vehicles, were used. The deep-learning generated model is capable of classifying
twenty-three classes with 62.5% accuracy. However, with the two-level model, the accuracy goes up to 79.3%
accuracy on average.
Keywords: Classification; Convolutional neural network; Label Data; Sedan car;

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Poster Presentation

กลุ่มท่ี 6
สาขาวิชาฟิสิกส์ พลงั งาน และวัสดุศาสตร์

การประชมุ วชิ าการระดบั ชาติ วทิ ยาศาสตร์วจิ ัย ครั้งที่ 12
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PHY-P-01 168

The investigation of resin and mortar resin containing boron compounds for fast neutrons
shielding

Kanisorn Kaewsrithong1, Pincha Torkittikul2 and Thanongsak Nochaiya1, 3, *
1 Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000
2Department of Civil Technology, Faculty of Industrial Technology, Lampang Rajabhat University, Lampang 52100
3 Research Center for Academic Excellence in Applied Physics, Naresuan University, Phitsanulok 65000
*Corresponding author email: [email protected]

This article aims to study on removal crossection, mean free path and half value thickness for determine fast
neutrons shielding properties of polyester resin and mortar resin. These materials have high hydrogen atom
content causing a good fast neutron shielding and good mechanical properties. In order to develop fast neutrons
shielding properties, boron cabide, boric acid and borax were added in the samples with contents of 10%wt,
20%wt, 30%wt, 40%wt, 50%wt and 60%wt. The calculated result shown that removal crossection trends to
increase with increasing boron compounds content while mean free path and half value thickness trend to
decrease when the boron compound increased. In addition, polyester resin containing boron cabide has the
best properties for fast neutron shielding.
Keywords: Fast neutron, Polyester resin, Mortar resin

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PHY-P-02 169

Resonant Power Sound and Dissonance in the Victory Gong

Itthichai Khammoon1, Kanphot Thongcham1, Watchara Pornkaveerat2 and Suksan Suwanarat1,*
1Department of Physics, Faculty of Science, Ramkhamhaeng University, Bangkok 10240
2Physics and General Science Program, Faculty of Science and Technology, Nakhon Ratchasimaa Rajabhat University,
Nakhon Ratchasima 30000
* Corresponding author email: [email protected]

In this research, we investigate the resonant power sound in the Victory Gong with a circular asymmetry. The
Gong, Thai traditional musical instrument, is forged a copper alloy circular plate with thick edges and a convex
circular button in the middle for beating. Its acoustics based on transverse standing waves in two dimensional
system of nodal diameters (n) and nodal circles (m) in circular membrane symmetry can vibrate in many modal
frequencies modes (nm) simultaneously to create complex and inharmonic sounds. The results show that such
asymmetry is a key process for the (21) mode to vibrate both in vertical and horizontal simultaneously causing
separation of two frequencies 302 and 317 Hz that can generate the beat frequencies of 15 Hz. As a result of
these low beat frequencies, the human brain perceives certain intervals as clashing known as the dissonance
with the fundamental frequency 151 Hz. Moreover, the vibrational modes all are (01), (11), (21), (21), (02),
(31), (31) and (12) mode and their inharmonies frequencies consist of the components 151. 0, 247. 5, 302. 0,
317.0, 367.0, 398.0, 402.5 and 452.0 Hz, respectively, in good agreement with theory. This research would be
helpful for musicians and instrument makers as well as also into the conservation of Thai musical instruments.
Keywords: Resonant Power Sound, Dissonance, Inharmonies, Victory Gong

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PHY-P-03 170

Optical absorption in a two-dimensional curved surface

Nut Pramjorn* and Attapon Amthong
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000
*Corresponding author email: [email protected]

Light absorption is a natural process occurring when light is absorbed at different wavelengths by an object.
To describe this phenomenon, the absorption coefficient is introduced as a quantitative measurement. It
indicates the intensity attenuation of the light which penetrates the object. Although this optical property has
previously been studied by various aspects of semiconductor structures, there are less information of the
two-dimensional curved surface. In our study, the total absorption coefficient of that two-dimensional curved
surface structure was calculated by analytically solving the Schrödinger equation of electrons in the system.
The results revealed that absorption coefficient signals of half- and nearly full-circle materials were observed
at higher incident photon energies, compared to those of plane surface which only found at the lowest photon
energy. Moreover, the peak of absorption coefficient at 1→3 transition gradually increased when the
material surface trended to be a full circle. These observations suggested that light was absorbed by full-
circle object at several wavelengths. We hypothesize that our findings presented here provide the
advancement of optical technology in curved surface structure and could be applied to optical sensor
development in the future.
Keywords: Absorption coefficient, Curved surface, Two-dimensional system

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย ครั้งที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-P-04 171

The measurement of sweetness of sucrose solution by light scattering
technique

Wongsathon Musikpan1, Saengphet Boonpang2 and Kachain Dangudom1,*
1Department of Physics, Faculty of Science, Naresuan University
2Science Lab Centre, Faculty of Science, Naresuan University
Corresponding author, email: [email protected]

This research has established a system to detect the changing of the polarization of light through the medium
by using light scattering from the dipole. The light source is a polarized laser diode with the wavelength of 650
nm. The sample is sucrose solution with concentration 0.375, 0.500, 0.625, 0.750 and 0.875 g/ml. Measured
the scattered light intensity using light dependent resistor (LDR) at various angles and different depths. It was
found that the high concentrations of sucrose solution provide the more changing polarized angles.
Furthermore, the relationship between sweetness in brix and the changing of polarized angle is an increasing
function linearly. So, this system can be applied for measuring sweetness of sucrose solution.
Keywords: Sucrose solution, Light scattering, Optical activity, Sweetness

การประชุมวชิ าการระดับชาติ วทิ ยาศาสตรว์ จิ ัย ครงั้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-P-05 172

On the ground-state energy of many-particle systems with relativistic kinetic energies

Siri Sirininlakul1*, Songsak Phonghirun1, Trai Unyapoti2 and Pisuttawan Sripirom Sirininlakul2
1 Department of Physics, Faculty of Science, Srinakharinwirot University, Bangkok, 10110
2 Department of Curriculum and Instruction, Faculty of Education, Srinakharinwirot University, Bangkok, 10110
3 Department of Mathematics, Faculty of Science, Srinakharinwirot University, Bangkok, 10110
* Corresponding author email: [email protected]

We prove rigorously that the ground-state energy of many-(or single-) particle systems with relativistic kinetic
energies for arbitrary given interaction potentials is bounded above by the corresponding one for systems
with non-relativistic kinetic energies and this is true independently of the statistics obeyed by the underlying
particles and independently of the dimensionality of space. In particular, this establishes the stability of so-
called “fermionic matter” with relativistic kinetic energies.
Keywords: ground-state energy, many-particle systems, relativistic kinetic energies, stability of fermionic
matter.

การประชุมวิชาการระดับชาติ วทิ ยาศาสตรว์ ิจัย ครงั้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-P-06 173

Colorimetric analysis system of the fermented biological extract: Programmable linear
actuator for the solution-sample manipulation

Thanadol Punyayong1, Siripoom Sirirat1, Watcharakon Toyaem1, Niyom Hongsit2, Kridsada Luangthongkham1,2 and Somrit
Unai1,2*
1Demonstration School University of Phayao, Phayao 56000, Thailand
2Departrment of Physics, School of Science, University of Phayao, Phayao 56000, Thailand
*Corresponding author email: [email protected]

The NPK-test kit is convenient and quick to use in agricultural activities. There are limitations, including limiting
the number of samples for the investigation and the measurement process is complicated for non-scientist
professionals. In this study, the programmable-linear actuators were designed and tested for the semi-automatic
NPK determination system. The linear actuators system consists of stepper-motor-driven syringe pumps and
an XYZ-linear translator. The syringe pumps loading the aqueous sample into a 9-well-plate sample holder.
Due to the resolution of the microliter-syringe pump, the volume of the NPK-test-kit solution was reduced. The
XYZ-linear translator provides the position of the well-plate for sample load from the syringe pumps. Here, we
explain and report the development process of the system.
Keywords: Syringe pump, Linear actuator, Micro-step driver

การประชุมวชิ าการระดับชาติ วทิ ยาศาสตร์วิจัย ครั้งท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-P-07 174

Fatty Acids as Corrosion Inhibitors for Low Carbon Steel

Nawarat Worauaychai* and Attapon Tareh
Department of Materials Technology, Faculty of Science, Ramkhamhaeng University, Bangkok, 10240
* Corresponding author email: [email protected]

This research is to study the feasibility of two fatty acids, hexanoic acid (HA) and octanoic acid (OA), to be
used as the corrosion inhibitors of low carbon steels in acid picking process. The concentration of acids used
in this work were 0, 1, 5 and 20 mM in 0.1 M H2SO4. The polarization curve showed that the corrosion potential
(Ecorr) of carbon steel in H2SO4 contained OA shifted to negative (cathodic) direction. Thus, OA is a cathodic
inhibitor controlling cathodic reaction chiefly. The corrosion rate also decreased with OA concentration. On the
other hand, H2SO4 contained 20 mM HA showed a slightly shift of Ecorr to positive direction and reduce corrosion
rate. In comparison with HA, OA at concentration of 20 mM exhibited highest inhibitor efficiency (%IE) of
72.33% and lower corrosion rate of 88.95% when compared with the non-inhibitor condition.
Keywords: Corrosion Inhibitor, Fatty acid, Hexanoic Acid, Octanoic Acid, Low Carbon Steel

การประชุมวชิ าการระดับชาติ วิทยาศาสตรว์ จิ ัย คร้งั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-P-08 175

Colorimetric analysis system of the fermented biological extract: Area optimization of
digital images for colorimetric analysis application

Watcharakon Toyaem1, Siripoom Sirirat1, Thanadol Punyayong1, Narong Kotchabhakdi3, Niyom Hongsit2, Somrit Unai1,2 and
Kridsada Luangthongkham 1,2*
1Demonstration School University of Phayao, Phayao 56000, Thailand
2Department of Physics, School of Science, University of Phayao, Phayao 56000, Thailand
3Department of Chemistry, Faculty of Science, Lampang Rajabhat University, Lampang 52100, Thailand
*Corresponding author email: [email protected]

This work, the process of software developed that is based on digital image processing principle for
quantitative determination of NPK in fermented biological extract (FBE) is proposed. The Red-Green-Blue
(RGB) images of mixture, FBE sample and NPK test kit solution, were processed using MATLAB image
processing toolbox. The square-homogeneous of R-, G- and B- components are optimized with a simple
mathematical regression analysis to generate a calibration curve. The standard color chart of a commercial
NPK test kit is used to convert RGB values to the NPK levels present in fermented biological extract. The
results of the experiment will be presented and discussed.
Keywords: Colorimetric analysis, Digital image processing, Fermented biological extract

การประชุมวชิ าการระดับชาติ วทิ ยาศาสตร์วจิ ัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-P-10 177

Online Laboratory Learning Media: Reflection and Refraction of Light

Parvinee Boonyaras, Charinrat Puasuwan and Kachain Dangudom*
Department of Physics, Faculty of Science, Naresuan University
Corresponding author, email: [email protected]

This research was provided online learning media on reflection and refraction of light. Ten sets of experiments
were presented in videos on the website. It was analyzed the use of online learning media which based on the
assessment results from laboratory scientists, teachers, and students. From the results of the online operation
satisfaction assessment, it was found that most of them had the satisfaction of using them at the highest level.
Results from a cognitive test of reflection and refraction of light after an online practice. It found that the average
score was 9.36 points out of 10 points, accounting for 93.6 percentage of the correct answers. The online
learning media is also providing additional guidance in teaching and learning styles to match the current and
the unexpected situations such as the COVID-19 epidemic, shortage of experimental equipment, or using for
assembly on the actual experiment.
Keywords: Online Laboratory, Reflection, Refraction

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ ิจัย ครงั้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-P-11 178

Study on Characteristics of PM2.5 Time Series Using Wavelet Analysis

Dalad Morasum1 Panatcha Anusasananan1* Suksan Suwanarat1 and Nipon Thangprasert1
1Department of Physics, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand.
Corresponding author, email: [email protected]

The Air pollution is a weather phenomenon caused by accumulation of atmospheric aerosols, the suspended
systems of liquid or solid particles in the air, through local emissions and regional transmission. One of the
most important components of the air pollution is the ambient particulate matter (PM) of the diameters of 10
µm (PM10) and 2.5 µm (PM2.5). These particles have direct impact on chronic human health via inhalation. In
this research, we study the PM2.5 time series using wavelet analysis which is the new technic used by many
researcher. The wavelet power spectrums are calculated based on the hourly, daily and monthly PM2.5 time
series to extract the information hidden in the series. The effects of rainfall and temperature on the PM2.5
concentration are also discussed. The results show that 1) there are more concentration of power on the
wavelet power spectrum between 22-26 hours, 5-7 months and 11-13 months which shows that this PM2.5
time series have a strong diurnal and annual signal. 2) The concentrations of PM2.5 are high in late winter and
summer and low in rainy season. The rainfall will decrease the PM2.5 concentrations due to its scavenging
effects on polluted air. 3) On one day period, PM2.5 is high in night time and low in day time. High temperature
in day time normally accompanies a higher boundary layer and promotes the vertical dispersion of PM2.5 within
the atmosphere. Knowledge of the information on the characteristics of PM2.5 concentration time series will
help both general people and government in better prepared to cope with PM2.5 pollution that came regularly
in summer time and caused the harmful effects on the population health.

Keywords: air pollution, particulate matter, PM2.5, Wavelet analysis, wavelet power spectrum

การประชุมวิชาการระดับชาติ วิทยาศาสตร์วิจัย ครงั้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-P-12 179

The absorption coefficients in equilateral triangular quantum wire

Jirarut Joonhuay 1 and Attapon Amthong1,*
1 Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 60150
* Corresponding author email: [email protected]

Optical properties in nanostructure are interesting and widely applied to optoelectronic device. Here, the linear
and nonlinear absorption coefficients in equilateral triangular quantum wire were investigated by using the finite
difference method to obtain the eigenenergies and eigenfunctions. The results show that the dipole matrix
element of the transition from the ground state to the first excited state with y-polarized light is equal to that
from the ground state to the second excited state with x-polarized light. Moreover, the absorption indicates
redshift behaviour when the quantum wire size is increased due to decreasing value of eigenenergies. The
optical properties we find may bring benefits to designing novel optical devices.
Keywords: Equilateral triangular quantum wire, The light absorption coefficient, Polarized light

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตร์วจิ ัย ครัง้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-P-13 180

Portable alcohol vaporizing meter for hand sanitizer gel solution using MQ-3 gas sensor and Arduino
microcontroller

Julaluk Niyom1, Suriya Yousabuy1, Nalena Praphairaksit2 and Suwan Plaipichit1*
1 Department of Physics, Faculty of Science, Srinakharinwirot University, Bangkok, 10110
2 Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, 10110
* Corresponding author email: [email protected]

The objective of this research was to develop a portable alcohol meter which measures evaporating Ethanol
from hand sanitizer gel solution using Arduino microcontroller and gas sensor. MQ-3 module, a gas sensor that
changes vaporized ethanol into electrical signals, was connected to an Arduino microcontroller. The electrical
signals were computed and shown on 16x2 Liquid Crystal Display module. Moreover, we added a LED that
blinks when the alcohol concentration is over 70% v/v. To calibrate this device, a series of ethanol solution
from 10% v/v to 80% v/v were prepared and tested. The results showed an exponential increase between
ethanol concentration and electrical signals. A series of prepared alcohol gel with ethanol concentration of
20% v/v to 70% v/v were tested to ensure that the device worked accurately. Finally, five samples of hand
sanitizer gel were tested. The results showed that there were only two samples that had more than 70% v/v of
alcohol whereas the rest were below 70% v/v even though the label clearly shown otherwise. In conclusion,
the device we developed is a portable device that can be used to detect the amount of ethanol in alcohol gel
and can help consumers select products with the effective amount of alcohol to kill germs.
Keywords: Electrical, Portable, Sensor, Ethanol

การประชุมวชิ าการระดับชาติ วทิ ยาศาสตร์วิจัย ครัง้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-P-14 181

Effect of curing time on physical properties and thermal transfer behavior of
PC-PCM mortars

Thanongsak Nochaiya1,2*, Pincha Torkittikul3, Phalitphat Khumfu4 and Panisara Disuea1

1Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000
2Research Center for Academic Excellence in Applied Physics, Naresuan University, Phitsanulok 65000
3Department of Civil Technology, Faculty of Industrial Technology, Lampang Rajabhat University, Lampang 52100
4Faculty of Industrial Technology, Uttaradit Rajabhat University, Uttaradit 53000
Corresponding author, email: [email protected]

The aim of this research is to study the effect of phase change materials (PCMs) and curing time of mortars
containing with PCMs on physical properties and thermal transfer behavior. PCMs type organic compounds
(paraffin) was used as an additive material with the ratios of 0, 5, 10, 15 and 20 percent by weight of cement.
The water to cement and the sand to cement ratios were kept constant at 1:2 and 2.5:1, respectively. The
cubic sample (5x5x5 cm3) was conducted for density and porosity tests while the plate sample (20x20x2 cm3)
was prepared for heat transfer test. The results shown that the density and porosity of the mortars decreased
with increasing PCMs content and curing time of samples. Moreover, PCMs additive affected to the time lag of
thermal transfer of PCMs mortar while the products of the hydration reaction (curing time) also affected to the
heat transfer behavior.
Keywords: Phase change materials, Hydration, Thermal behavior, Physical property

การประชุมวิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-P-15 182

Incorporation of Waste Powder from Automotive Refinishing Industry into Lightweight
Concrete for Reducing Energy Consumption in Buildings

Chanita Mano, Atthakorn Thongtha *, Somchai Maneewana, Chantana Punlek
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
* Corresponding author e-mail: [email protected]

This current investigation is concentrated on improving the thermal efficiency of this autoclaved aerated
concrete (AAC) by incorporation black powder as a component. Black powder is a waste product of the
automotive refinishing industry in Thailand. The dynamics of heat transfer and the cooling load of air
conditioning plants in four simulated houses with different wall materials (Brick, cement block, AAC and AAC
with incorporating black powder) were investigated. The investigation demonstrated that by incorporation black
powder a significant increase in the thermal effectiveness of the building materials was achieved and
determined by comparing the heat flux at the indoor surface. The increase in thermal effectiveness was the
greatest when black powder was applied to the AAC. It was demonstrated that the wall with the incorporation
of black powder can reduce the cooling load and power requirements of air conditioning plants in buildings by
25.5%, 37.9% and 48.1% when compared with the AAC, brick and cement block, respectively.
Keywords: Autoclaved aerated concrete, Heat flux reduction, Building materials, Insulation material, Cooling
load.

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตร์วจิ ัย คร้งั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-P-16 183

The study of the charge storage for husk activated carbon electrodes
in acetic acid solution

Thichakorn Chanthachot and Nuchjira Dejang
Physics department, Faculty of science, Naresuan University
Asst. Prof. Dr. Nuchjira Dejang email: [email protected]

In this research, rice husk activated carbon was sintered by carbonization process at 700 ° C for 1 hour and
stimulated with microwave radiation electric power at 140, 420 and 700 Watt. The rice husk activated carbon
was formed into an electrode. The charge storage test of activated carbon electrode was performed using the
cyclic voltammetry technique. In the result, the rice husk activated carbon by water in with combination
microwave irradiation for activation, it was presented to affects the ability capacitance of electrodes. The both
types of e Type 1 led an activated carbon electrode and Type 2 mixed electrode by the microwave irradiation
power 700 W for activation. In conclusion, the capacitance charge of rice husk activated carbon was increased
with addition microwave power for stimulation.
Keywords: rice husk activated carbon, microwave irradiation, capacitance charge, electrode, MgO

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตรว์ ิจัย ครงั้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

Poster Presentation

กล่มุ ท่ี 7
สาขาวชิ าวทิ ยาศาสตรน์ วัตกรรมเชิงพาณิชย์

การประชุมวิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย ครัง้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร

INNO-P-01 184

Robot for risky experiment

Tanakrit Saenyang1, Thanachot Wongpuk1, Jirachita Siriratpiriya1 and Sarit Phromtep1,*
1 Demonstration School University of Phayao, University of Phayao, Phayao, 56000
* Corresponding author email: [email protected]

Today the robot technology can access the human closely. Everyone can develop the robot and the robot can
work replacing some job among the risk environment. Robots are increasingly used to improve the safety of
workers performing these tough and dangerous tasks.
This paper introduces the concept and design of the robot arm with the composition and fabrication low-costs,
people can afford it to do work instead of humans in the experiment. We made two different robots to compare
them. The prototype primary robot made by Robot kit MRT5 model and made the second robot by Arduino
robot. The overall system is developed using robot arm and (UNO R3) controller. The movement of the robot
arm is driving movement by servo motors many size. However, an ultrasonic sensor has been used to sense
the presence of the object. The robot arm is operating and controlled by a mobile application and communication
command by Bluetooth. We test the capabilities of these robot by lifting objects, speed testing and control
distance.
The study reports a design of an Arduino robot that can pick and place a 0.5-kg payload. It can lift more weight
than MRT5 robot than can lift only 0.15-kg. The speed of MRT5 robot and Arduino robot is similar, speed is
0.22 m/s and 0.28 m/s. Control distance of MRT5 robot is 10 meters and Arduino robot is 45 meters.
This project has gone successfully that the robot can catch objects and can be controlled via application in
mobile phone. And proposed the idea of creating a robot that can reduce the risk to the experiment.

Keywords: Arduino controller, Robot arm, Servo motor, Ultrasonic sensor

การประชมุ วชิ าการระดับชาติ วิทยาศาสตรว์ ิจัย คร้ังท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลัยนเรศวร

Poster Presentation

กล่มุ ที่ 9
Routine to Research สายสนบั สนุนเครอื เทางาม

การประชมุ วชิ าการระดบั ชาติ วิทยาศาสตรว์ ิจยั คร้งั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวทิ ยาลยั นเรศวร

R2R-P-01 185

Personal information system development to excellent promote for school of science

Supachai Ponsupachai1
1Science office, School of Science , University of Phayao , Phayao 56000
* Corresponding author email: [email protected]

The problem with research is that the data of the Faculty of Science personnel is for planning, managing of
the organization, and it is the data that answers the AUN-QA and EdPEx indicators. Data retention does not
meet the benchmark.
This research aims to develop personnel information systems to excellence, faculty of science, research
instruments, by conducting data collection by group discussions with the Board of Sciences, Phayao University
and the Quality Assurance Committee of education, faculty of science, and through the criticism of 85 academic
personnel.
The results showed that system development through system development life cycle theory : SDLC and Visual
Basic. The created system was developed using data management system (SQL Server) and web server (web
application) which the system can work on the system operate window and use the system through a browser
program ( Google Chrome) . The development system has the ability to manage data that consisting of
information on teaching work, creative research work, academic services, academic development, The company
has designated 4 groups of system users as administrators. General staff, auditors and executives Calculated
based on criteria based on the announcement of academic personnel workload standards and automatically
processes workloads, which can be supported by educational quality assurance. In AUNQA 6, Acadamic Staff
Quality and EdPEx Section 5 , together with management's decision to analyze data to plan for improving the
effectiveness and capabilities of the organization.

Keywords : Personal information system , excellent promote

การประชุมวิชาการระดับชาติ วิทยาศาสตร์วจิ ัย คร้งั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวทิ ยาลยั นเรศวร

R2R-P-02 186

Measurement radiation dose and protection of scattering radiation from portable x-ray
photography to patient and medical personnel in the University of Phayao Hospital

Suphansa Chansuriya1 Phapimonkwan Kasirijaruen2 Pennipat Nabheerong2 Niyom Hongsith1
1Department of Physics, School of Science, University of Phayao
2School of Medicine University of Phayao Hospital
* Corresponding author email: [email protected]

In this research, the scattering radiation dose from portable X-ray imaging was measured and studied. Along
with the prevention guidelines of the amount of scattered radiation from portable X-ray imaging to patients and
healthcare workers was proposed by radiation dose must not exceed the standard set by ICRP. This research
is studied at the Diagnostic Radiology Department Phayao University Hospital. First, the radiation dose
conditions of the portable X-ray were determined from the collection of statistics. It was used as a condition for
setting the potential difference and the current of the radiation generator. The values were in the range of 50-
102 kV and the current range of 2-40 mAs. After that, the scattered radiation dose was measured by using an
ionizing radiation detector or survey meter and connected the signal from the meter to the personal computer
directly. The instantaneous radiation dose was measured at distances of 1, 2, and 3 meters that passed and
did not pass the lead barrier which thickness of 1 mm and 2 mm, respectively. After that, the equivalent
radiation dose was calculated and compared with the radiation dose that medical personnel should receive in
accordance with the ICRP standard of 20 microsieverts per year. From the data analysis, it was found that the
amount of scattered radiation was reduced from the use of a radiation barrier. Finally, the researcher proposed
measures to prevent the amount of scattered radiation from portable X-ray imaging to patients and healthcare
workers for future practice at Phayao University Hospital.

Keywords: Scattered radiation dose, Radiation dose measurement, Portable X-ray machine, Lead shield.

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย ครัง้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลัยนเรศวร

R2R-P-03 187

Flowering Plant Database and Geocode for Botanical Studies in University of Phayao.

Wiwat Tharin1* and Narumol Boonruang1
1 Department of Biology, School of Science, University of Phayao, 56000
 Corresponding author, email: [email protected]

This research presents the database and geocode of flowering plants for botanical studies in Department of
Biology, School of Science, University of Phayao between the academic year 2020 (from February 2020 to
January 2021). The study area was divided to five subareas (A, B, C, D and E).Target plants were observed
including photographed and collected for identification and classification. Botanical and ecological data and
plant distribution areas were recorded. GPS trackers were used for geocoding. Thirty-three families were found
in study area. Fourteen, 43, 10, 3, and 26 species were recognized from area A, B, C, D and E, respectively.
This work promotes high efficiency of academic work, reduces of time consuming and handling of plant sample
errors, enhances correctly botanical data distribution, supports plant biodiversity conservation and increases
realization in sustainable of plant genetic resource use.
Keywords: Geocode, GPS, Flowering Plant Database

การประชุมวชิ าการระดับชาติ วิทยาศาสตรว์ ิจัย ครั้งที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร

คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร

งานวิจัยและบริการวชิ าการ
คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร
ต.ท่าโพธิ์ อ.เมอื ง จ.พิษณุโลก 65000
โทรศัพท์. 0 5596 3171 โทรสาร 0 5596 3141
https://src12.nu.ac.th/src12/