Abstracts

MATH-O-07 56

The number of factors of reducible numerical semigroup 0a,bc,)

Saowaros Tangtong * and Ekkachai Laysirikul
Department of Mathematics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author e-mail: [email protected]

Let S be reducible numerical semigroup. Then there exist numerical semigroups T1,T2 such that
S = T1 T2 and S  T1, S  T2 .

In this case, we called T1 and T2 are factor numerical semigroups of S . The aim of this research, we will
describe some characterizations of factors numerical semigroup of reducible numerical semigroup

0a,bc,) where a,b be the set of integer x such that a  x  b and c,) be the set

of integer y such that c  y .
Keywords: Reducible numerical semigroup

การประชมุ วชิ าการระดับชาติ วทิ ยาศาสตรว์ จิ ัย ครั้งท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
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Oral Presentation

กลมุ่ ท่ี 4
สาขาวิทยาศาสตรศ์ กึ ษา และคณิตศาสตรศ์ กึ ษา

การประชุมวชิ าการระดบั ชาติ วทิ ยาศาสตรว์ จิ ยั ครั้งที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร

EDU-O-01 57

Effects of Problem-Based Learning Topic Water Quality and Life Science Learning
Achievement and Environmental Education Ability of General Science Student Teachers

Surasak Laloknam1*, and Bongkoj Boonburapong1
1 Department of General Science, Faculty of Sciences, Srinakharinwirot University, Bangkok, 10110
* Corresponding author email: [email protected]

The purpose of this research was to study the science learning achievement and environmental education
ability that learned with problem-based learning activities. The study group consisted of 28 undergraduate
students in the education program in General Science, Faculty of Science, Srinakharinwirot University who
studied the Environmental Science for Science Teachers 1 in 1/2563 semester. The research tools were
problem-based learning lesson plans, science learning achievement tests, and environmental education
ability evaluation form. Data were analyzed using mean ( ̅), standard deviation (S.D.), percentage (%), and
t-test. The results were revealed that: 1) the average science learning achievement score of students after
learning with problem-based learning activities (84.80%) was significantly higher than those before learning
(64.13%) at .01 statistical level. The environmental education ability score of students after treated with
research-based learning activities (86.70%) was significantly higher than those before the treatment (67.85%)
at .01 statistical level. This could be concluded that problem-based learning activities develop science
learning achievement and environmental education ability of science student teachers.
Keywords: Problem-based learning, Water quality, Science learning achievement, Environmental education
ability

การประชุมวชิ าการระดับชาติ วิทยาศาสตร์วจิ ัย คร้งั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

EDU-O-02 58

Effects of Research-Based Learning Topic of Food and Nutrition on Science Learning
Achievement and Science Problem Solving Ability of General Science Student Teachers

Bongkoj Boonburapong1, and Surasak Laloknam1*
1 Department of General Science, Faculty of Sciences, Srinakharinwirot University, Bangkok, 10110
* Corresponding author email: [email protected]

The purpose of this research was to study the science learning achievement and science problem -solving
ability of General Science Student Teachers who learned with research-based learning activities. The study
group consisted of 21 undergraduate students in the education program in General Science, Faculty of
Science, Srinakharinwirot University who studied Principles of Biology for Science Teachers 1 in 1/2563
semester. The research tools were research-based learning lesson plans, science learning achievement
tests, and science problem-solving ability evaluation forms. Data were analyzed using mean ( ̅), standard
deviation (S.D.), percentage (%), and t-test. The results were revealed that: 1) the average science learning
achievement score of students after learning with research-based learning activities (84.13%) was higher
than those before learning (61.70%) at .01 statistically significant level. 2) the science problem-solving ability
score of students after learning (87.10%) was significantly higher than those before learning (63.15%) at .01
statistical level. This could be concluded that research-based learning activities develop science learning
achievement and science problem-solving ability of science teacher students.
Keywords: Research-based learning, Food and nutrition, Science learning achievement, science problem-
solving ability

การประชุมวชิ าการระดับชาติ วิทยาศาสตร์วิจัย ครงั้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
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Oral Presentation

กลมุ่ ท่ี 5
สาขาวิชาคอมพิวเตอร์ เทคโนโลยีสารสนเทศ

วทิ ยาการขอ้ มลู

การประชุมวชิ าการระดบั ชาติ วิทยาศาสตรว์ ิจัย ครัง้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
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COM-O-01 59

DEVELOPMENT OF DATA VISUALIZATION ABOUT YOGA POSES TO RELIEVE PAIN
RECOMMENDATION FOR ELDERLY

Yanisa Tanusa* and Preecha Tangkraingkij Department of Information Technology, Faculty of Science and Information
Technology, Sripatum University. Bangkok 10900
* Corresponding author email: [email protected]

The elderly usually have muscle aches which could be caused by many reasons such as working, heavy lifting,
incorrect standing posture and incorrect sitting posture, have accumulated over time causing spasm in muscles
and tendons in various parts of the body. These pains can be prevented by working in proper posture, exercise,
and stretching. Yoga is a combination of strengthening and stretching, which is not too heavy exercise, making
it easy for the elderly to follow. The rising of using the technology of the elderly continually, lead researchers
to study and gather knowledge of yoga that is suitable for the elderly that processed data selection, data
cleaning, and storage in the data warehouse. A then develop data visualization to analyze the data. From the
results of user satisfaction at a high level, which can be concluded that Visualization is presented to be accurate,
clear and easily understandable, with appropriate selection of colors and chart formats which can help facilitate
the use of the elderly and those who are interested as well.
Keywords: Yoga, Elderly, Data Visualization

การประชมุ วชิ าการระดับชาติ วิทยาศาสตร์วิจัย ครั้งที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

COM-O-02 60

Factor affecting the acceptance of PromptPay technology: New cutting edge in
undergraduate’s generation

Kanjanaporn Soda1, Nantana Sedkanbow2 and Kritcha Yawised3*
1-2Current students of Faculty of Business, Economics and Communications, Naresuan University, Phitsanulok, 65000
* Co-responding author: Kritcha Yawised, Email: [email protected]

This study was a quantitative research aimed to study the factors and behaviors affecting an Accepting the
selection of the PromptPay transfer system. The participants of the study were 400 of students at Naresuan
University, Phitsanulok. The statistics analysis used include: Descriptive statistics consisted of frequency,
percentage, mean scores and standard deviation, and inferential statistics consisted of One – Way ANOVA
and Independent samples T-Test.
The findings of a study showed that the demographic factors including gender and age of respondents are
critical factors affecting towards an attitude of using and the acceptance of Prompt Pay technology. This
includes the payment behavior among students also directly affects to the adoption of such technology.
Furthermore, findings show that (i) perceived of usefulness is about convenience, which can pay available
anytime and anywhere (ii) perceived ease of use includes easily use with functionality, (iii) attitude of using
related to modernity and the reduction of cost of banknotes production; and (iv) behavioral intention is the
intention of continuously Promptly usage in every single services.
Keywords: PromptPay, E-Payment, Cashless Society, Online Payment, TAM theory

การประชมุ วิชาการระดับชาติ วิทยาศาสตร์วจิ ัย ครง้ั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
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COM-O-03 61

Android Mobile Application for Life Insurance Plan Selection

Tanit Malakorn1,* Chatphimuk Hirunyacharttada2 and Wiritphon Phumiprathet2
1 Department of Electrical and Computer Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, 65000
2 Undergraduate students, Major in Electrical Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

This research is primarily aimed at developing an android mobile application to select a life insurance plan
based on constraints and criteria specified by a user. The application is highly flexible and can be used with
any existing basic life insurance plans in Thailand. After a user fills in all required data of life insurance plans
completely and clicks the “confirm” button, the data will be stored in the server. In the insurance plan selection
process, the user must set the filtering criteria, such as internal rate of return, rate of coverage, worth rate, tax
deduction, and health insurance rider. The application will then compute the scores corresponding to each plan,
sort them in descending order, and finally display only the top five insurance plans with the highest scores.
This application can also be used in the life insurance business since it was designed to allow supervisors to
fill in the commission percentage. The application was tested by 30 individual users, and the results were
satisfactory with an average score of 4.85 out of 5, and a standard deviation of 0.11.
Keywords: Android operating system, mobile application, rate of coverage, worth rate, internal rate of return,

life insurance plan management

การประชมุ วชิ าการระดับชาติ วิทยาศาสตร์วจิ ัย คร้ังที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

COM-O-04 62

Seven segment digit recognition by using computer vision technique

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

This research aimed to collect digital numbers from digital instruments with gray dials. The objective is to create
a program for processing and storing digital numerical data so that the information can be further used. By
using a digital number photographic method and sending it to a computer to process the image and outputting
it. By camera and small computer. When the computer takes a picture, the program will encode the image and
compare it with the code of the digital numbers that match of numbers.
Keywords: 7 Segment, Recognizing digits

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

Oral Presentation

กลุม่ ที่ 6
สาขาวิชาฟสิ กิ ส์ พลงั งาน และวสั ดุศาสตร์

การประชุมวิชาการระดับชาติ วทิ ยาศาสตร์วจิ ยั คร้ังที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-01 63

Effect of Heat Treatment on Microstructure and Hardness of 25wt.%Cr-0.7wt.%Mo Cast Iron

kanlaya Thongsai and Amporn Wiengmoon*
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

High chromium cast irons are widely used as wear parts in slurry transport, mining, minerals and cement
industries. In this research, the as-cast samples were annealed at 800°C for 4 hour, followed by furnace cooling
with a cooling rate of 20oC/hour. Destabilization was done at 1000°C for 2 hour, and then air cooling. Tempering
after destabilization was performed at 450°C for 4 hour, followed by air cooling. Phase identification and
microstructure were investigated by XRD, OM and SEM. Vickers macro-hardness was tested. OM and SEM
revealed that the as-cast microstructure consisted of the primary austenite dendrite, eutectic carbides and
eutectic austenite which partially transformed to martensite. After annealing, precipitation of secondary carbides
within ferrite matrix and small areas of pearlite structure were observed. Destabilization led to precipitation of
secondary carbides and austenite transformed to martensite. Tempering after destabilization increased the
amount and size of secondary carbides. XRD patterns confirmed the matrix in the as-cast, annealed and
destabilized/tempered samples were austenite, ferrite and martensite, respectively. While, the eutectic carbide
and secondary carbide were M7C3 and M23C6. The macro-hardness in the as-cast, annealed, destabilized and
tempered samples were 490, 398, 714, and 746 HV30, respectively. Annealing decreased the hardness, due
to the formation of ferrite. After destabilization the hardness increased because of the formation of martensite
matrix and precipitation of secondary carbides. Tempering slightly increased the hardness, this is due to the
increasing of secondary carbide.

Keywords: High Chromium cast iron, Heat treatment, Microstructure, Hardness

การประชมุ วชิ าการระดับชาติ วทิ ยาศาสตรว์ จิ ัย ครงั้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-02 64

Catalyst-free Dielectric Barrier Discharge Plasma for Partial Hydrogenation of Palm
Biodiesel

Grittima Kongprawes1 and Doonyapong Wongsawaeng1,*
1Research Unit on Plasma Technology for High-Performance Materials Development, Department of Nuclear Engineering,
Faculty of Engineering, Chulalongkorn University, Bangkok 10330
*Corresponding author email: [email protected].

One of the methods utilized to improve the oxidation stability of biodiesel is hydrogenated fatty acid methyl
ester (H-FAME) production. Generally, the hydrogenation reaction relies on high-temperature and high pressure
in the presence of a catalyst. In the present work, a parallel plate type dielectric barrier discharge (DBD) plasma
which can be generated at atmospheric pressure and low temperature without a catalyst was employed. The
plasma gases including He/ H2 and N2/ H2 mixtures, H2 concentration, and input power to produce plasma
were investigated. The reaction was conducted at ambient temperature using 50 mL of palm biodiesel. In the
plasma phase, there were many reactive species, particularly atomic hydrogen that could successfully
incorporate with C=C bonds. This caused the reduction in iodine value and the more saturated H-FAME product
with greater oxidation resistance. However, H-FAME had a higher cloud point than that of feed biodiesel, but
was still within the biodiesel standard of Thailand. The DBD plasma technology could be effectively practiced
for H-FAME production with a similar performance to catalytic hydrogenation.
Keywords: Biodiesel, Dielectric Barrier Discharge plasma, Partial hydrogenation

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตรว์ จิ ัย ครั้งที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-03 65

Effect of Normalizing and Hardening on Microstructure and Hardness of 5160 Steel

Jirayut Natjoy and Amporn Wiengmoon*
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

Alloy steel 5160 are widely used in the automotive such as leaf springs. In this work, the 5160 steel samples
(as-received) were primary normalized at 900°C for 1 hour and then air cooling to room temperature. Secondary
normalizing was performed at 870°C for 1 hour and then air cooling. Hardening after normalization was done
at 830°C for 30 minutes, followed by oil quenching at 50°C. Phase identification and microstructure were studied
by XRD, OM and SEM. Rockwell macro-hardness was tested. It was found that as-received microstructure
composed of ferrite and carbide precipitated within ferrite matrix. After primary normalizing at 900°C, the
microstructure consisted of ferrite and pearlite. After secondary normalizing at 870°C, fine ferrite and fine
pearlite were formed. After normalizing at 900 and 870oC, the macro-hardness decreased from 26 HRC in the
as-received sample to about 23 and 20 HRC, respectively, due to the formation of ferrite and pearlite. The
microstructure after hardening consisted of martensite, bainite and martensite with retained austenite (M/A).
After normalizing-plus-hardening, the amount of fine bainite and M/A increased. From XRD results confirmed
the presence of ferrite in the as-received and normalized samples. Martensite and retained austenite were
found after hardening. Hardening (without normalizing) increased the hardness up to 53 HRC, due to the
formation of martensite. However, normalizing-plus-hardening reduced the hardness to about 43 HRC. It can
be seen that normalizing led to increase the retained austenite and deceased the hardness after hardening.

Keywords: Alloy steel 5160, Normalizing, Hardening, Microstructure, Hardness

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PHY-O-04 66

Synthesis CCTO powder added La, Y and Zr prepared by molten salt method

Thanawan Wongsrirak1 and Chompoonuch Warangkanagool1,2,*
1 Department of Physics, Faculty of Science, Naresuan University, Phitsanulok Province, 65000
2 Research Center for Academic Excellent in Applied Physics, Faculty of Science, Naresuan University, Phitsanulok Province.
* Corresponding author, email: [email protected]

In this research, study synthesis Ca1-xLaxCu3Ti4O12+x/2 (CLCTO) powder when La or x is 0.05, 0.07 and 0.1 by
mole CaCu3Ti4-xYxO12-x/2 (CCTYO) powder when Y or x is 0.01, 0.03 and 0.05 by mole and CaCu3Ti4-xZrxO12-x/2
(CCTZO) powder when Zr or x is 0.01, 0.03 and 0.05 by mole. All mixed powders prepared by molten salt
method and calcined at 800oC for 8 hours. The powders were investigated the phase structure and the
microstructure by X-ray diffraction technique (XRD) and scanning electron microscope (SEM) respectively. The
XRD pattern all of powders be similar to the CCTO phase on JCPDS file No. 01-075-2188 with the secondary
phase CaTiO3 and CuO. The microstructure of powders showed that the particle was homogeneous and cubic
shape. The average particles size of CLCTO, CCTYO and CCTZO powders were 0.98-1.20, 1.03-1.36, 1.00-
1.39 µm respectively.
Keywords: CLCTO powder, CCTYO powder, CCTZO powder, Molten salt method

การประชุมวิชาการระดับชาติ วทิ ยาศาสตร์วิจัย คร้งั ที่ 12
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PHY-O-05 67

Microstructure characterization and hardness in 28wt.%Cr-2.6wt.%C-(0-10)wt.%Mo cast iron

Kittikhun Ruangchai1, Ruangdaj Tongsri2, Amporn Wiengmoon1,*
1 Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
2 Powder Metallurgy Research and Development Unit (PM-RDU), Thailand National Metal and Materials Technology Center,
Pathum Thani, 12120, Thailand
* Corresponding author email: [email protected]

In this study, it was to determine the effect of Mo addition (1, 6, and 10wt.%) on microstructure and hardness
of 28wt.%Cr-2.6wt.%C high-chromium cast iron. Microstructure was studied by optical microscopy and scanning
electron microscopy equipped with energy-dispersive X-ray spectrometry. Phase identification was studied
using X-ray diffraction technique. Vickers macro-hardness was tested. The resultant microstructures were
identified by metallography. In this case, two etchants of Na2S2O5’s reagent (50 ml of HCl and 10 g of Na2S2O5
in 100 ml distilled water) and color tint etching with Groesbeck’s reagent (4 g of potassium permanganate and
4 g of sodium hydroxide in 100 ml distilled water) were used to reveal the microstructure. After etching with
Na2S2O5’s reagent, it was found that the as-cast microstructure of 28wt.%Cr–2.6wt.%C iron (reference iron)
consisted of primary dendritic austenite, eutectic carbides and eutectic austenite which partially transformed to
martensite during cooling in the mold. For the iron with 1wt.%Mo (Mo1), 6wt.%Mo (Mo6) and 10wt.%Mo (Mo10)
additions, size and amount of eutectic carbides increased with increasing Mo content. Furthermore, the eutectic
carbides in Mo10 iron shown aggregates with fine cellular/lamellar structure. From the result, it can be seen
that 10% Na2S2O5’s reagent was the best etchant for distinguishing austenite and martensite but the
determination of eutectic carbide is difficult. The result of color metallography using Groesbeck’s reagent
displayed the eutectic carbide in light brown and blue, while austenite in white. Some areas, carbide with dark
brown color were detected in Mo6 iron. While, Mo10 iron revealed of radiating colonies in yellow brown and
fish-bone structure in dark brown, without light brown and blue carbide. These carbides can be clearly seen
with difference contrast in SEM-BEI images. The fish-bone and radiating colonies carbides showed the brightest
and second-brightest contrast in SEM-BEI image. From XRD patterns and SEM-EDS results confirmed that
eutectic carbide in light brown and blue, radiating colonies and fish-bone structure with a brightest contrast in
SEM-BEI were M7C3, M23C6 and M6C, respectively. The Vickers macro-hardness of the reference iron, Mo1,
Mo6 and Mo10 irons were 508, 529, 695 and 712HV30, respectively. The macro-hardness increased with
increasing with Mo content, this is due to the formation of hard M6C carbide and solid solution of Mo in the
austenite matrix.

Keywords: Color metallography, Eutectic carbides, High-chromium cast iron, Microstructure

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ ิจัย ครัง้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-06 68

PERSONAL IDENTIFICATION USING THE DISTANCE AND TRIANGLE BETWEEN THE
METACARPOPHALANGEAL JOINT

Siwa Srathongkao1 Yongyut Kaewjumras2 Wanasanan Ngamsapmanee1 Nuttakrit Somdock1 Bhanupol Klongratog1*
1 Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok
2 National Science Museum Klong Ha, Klong Lung District, Pathum Thani
Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok
 Corresponding author, email: [email protected]

Personal identification using the distance among the metacarpophalangeal joints (MCPs) was presented in
this study. The system was developed to specify the dorsal hand patterns. Firstly, the dorsal hand images
were taken for the subjects via an infrared camera. Secondary, the dorsal hand images were converted to
grayscale and binary images using image processing techniques. After that, the distance of the MCPs was
measured by various the dorsal hand image including index to middle, middle to ring, ring to little, and index
to little of the dorsal hand, respectively. In addition, the triangle area between index to middle, middle to ring,
ring to little, and index to little of the dorsal hand were used to specify the dorsal hand patterns. The result of
the distance and the triangle area of the MCPS can be used to identify a person because of the difference of
distance and the triangle area of the MCPs of each person.
Keywords: Personal identification, Dorsal-hand, Metacarpophalangeal joint

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

PHY-O-07 69

Numerical Simulation on Atmospheric Dynamics of Tropical Storm Sinlaku with WRF Model

Warin Ta-on1, Benjarong Pearman1, Chainarong Raktham1,*
1Faculty of Education Uttaradit Rajabhat University 27 Injaimee Road, Tha-it Sub-District, Muang District, Uttaradit, 53000
* Corresponding author e-mail: [email protected]

This study was aimed to investigate atmospheric variables due to Tropical Storm Sinlaku within domain (latitude
6-24๐N, longitude 95-125๐E). The Storm developed and dissipated between 31st July (18UTC) and 3th August
2020 (00UTC) The Weather Research and Forecasting Model (WRF) was used to simulate single domain with
36 km grid size (59*94) and 35 vertical layers. The FNL was input as initial and lateral boundary conditions.
This simulation was conducted by Betts-Miller-Janjic ( BMJ) Cumulus Physics Parameterization scheme (CP),
Purdue Lin scheme (LIN) Microphysics scheme (MP) and Yonsei-Univeristy (YSU) planetary boundary layer
scheme (PBL), while the NCL.
The results of the study revealed that the WRF model simulates the following weather conditions an east wind
and west wind in South China Sea shearly flow causing counter-clockwised vorticity around low-pressure
depression and it developed into Tropical Storm Sinlaku on August 1st, 2020. The maximum wind speed near
its center was approximately 38 Khot. The lowest pressure is about 994 Mb. An area where Tropical Storm
Sinlaku passes through it. The rain is Very heavy and widespread. (cumulative rainfall for 24 hours, maximum
approximately 102.4 mm). the Tropical Storm trajectory of the storm will be formed in the South China Sea.
(latitude 17๐N, longitude 116๐E) moving through the Hainan Islands Vietnam Laos and disintegration in northern
Thailand. The timing and path of the formation until the dissolution of the storm Consistent with the
measurement data from the Meteorological Department

Keywords: Atmospheric Dynamics, Dynamical Downscaling, Numerical Weather Simulation, Tropical Storm
Sinlaku, WRF

การประชุมวชิ าการระดับชาติ วิทยาศาสตรว์ ิจัย คร้งั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-08 70

Flexible temperature sensors from carbon nanotubes

Samitta Tanasapsin 1 Salinthip Seatasaen1 and Komkrich Chokprasombat2,*
1 Paphayompittayakom School, SCiUS – Thaksin University, Phatthalung, 93210
2 Department of Physics, Faculty of Science, Thaksin University, Phatthalung, 93210
* Corresponding author email: [email protected]

Measuring body temperature is very important in medicine. A number of diseases are characterised by a
change in body temperature. With other illnesses, the course of the disease can be followed by measuring
body temperature. This allows the doctor to analyse the effectiveness of treatments based on body
temperatures. Nowadays, there are various methods of measuring temperature. Such as measuring with a
mercury thermometers, infrared thermometer. However, the aforementioned temperature measurement has a
rather large aberration due to not direct contact with the skin, it processing is quite slow and nuisance to the
user. One of the essential devices is flexible temperature sensors for body temperature detection. Temperature
sensors with good mechanical flexibility, high sensitivity, fast response and recovery time are essential features
for real time measurements by electronic Skin (eSkin). In this project presents the fabrication and characterization of a
flexible temperature sensor using carbon nanotubes by studying at 5%, 10% and 15% w of carbon nanotubes against
ethanol concentrations for SDBS and PVP using 7.5% w and 50% w of carbon nanotubes are stirred for 24
hrs. Coating gold onto the plastic sheet by using sputtering machine for creating electrodes, then use the
conductive ink to screen printing on the plastic sheet and encapsulate the sensing area with ultra-thin PDMS.
Finally, the graph will show the relationship between resistance and temperature. This method is another option
that could be used as a highly effective body temperature sensor in the future.

Keywords: Flexible temperature sensor, Carbon nanotube, Electrical property, Physical sensor

การประชมุ วชิ าการระดับชาติ วทิ ยาศาสตรว์ ิจัย คร้ังท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-09 71

Effect of human movement on the spread of COVID-19 in Thailand

Thanchanok Lincharoen1, Sudarat Chadsuthi1,*, Charin Modchang2,3
1Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand
2Biophysics Group, Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
3Centre of Excellence in Mathematics, CHE, 328, Si Ayutthaya Road, Bangkok 10400, Thailand
* Corresponding author email: e-mail: [email protected]

In December 2019, the first case of coronavirus (COVID-19) was reported in Wuhan, China. For Thailand, the
first case was reported in January 2020 at Bangkok, and the first large outbreak occurred in March at Bangkok’s
Lumpini Stadium. People, who visited the stadium for a boxing tournament that was held there. Many of these
people left Bangkok and moved to the other provinces to escape possible infection as the number of cases in
Bangkok began to increase. This led to further infections in the other provinces. In this study, we estimated the
number of exported cases from Bangkok to other provinces in Thailand during April 2020 using the probability
of infection and travel volume from the Ministry of Tourism and Sports in April 2019. Our results found that the
total estimated cases were 1,882 cases (95% credible interval 1,781-1,980), which is more than twice the
number of actual reported cases in cases where there are no control measures. When the traveling rate was
reduced by 60.62%, the total estimated cases were 740 (95% credible interval 684-795), which correspond to
the reported cases. We also found that the exported cases depended on the rate of travel, thus decreasing the
traveling rate led to a fall in the number of exported cases. Our findings highlighted the idea that the reduction
in traveller numbers could reduce the number of cases, which supported the government lockdown policy. Our
model may also be applied to a possible second COVID-19 wave in Thailand.

Keywords: COVID-19; Human Movement; Thailand

การประชมุ วชิ าการระดับชาติ วิทยาศาสตรว์ ิจัย คร้ังท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-10 72

Chaplygin Gas with Power-Law Dark Energy

Phongsaphat Rangdee1*1High Energy Physics and Cosmology Research Group (HEPC),
Department of Physics, Faculty of Science, University of Phayao, Thailand
*Corresponding author. Tel. +66-5446-6666#1708; Fax: +66-5446-6664
E-mail: [email protected]

Our universe is under the accelerating expansion phase. Many models have been proposed to explain this
behavior. Among these models, the power-law and Chaplygin gas are two of the most interesting models. We
studied the Chaplygin gas in the scenario of canonical power-law (CGP model) and phantom power-law (CGPP
model). In these two models, the deceleration parameter ( 0), the power-law exponents and the equation of
state parameter ( 0) at present are calculated. In this calculation, we used two observational data coming
from WMAP9 (WMAP9+eCMB+BAO+H_0) and PLANCK satellite reported in 2018 (TT,TE,EE+lowE+
Lensings+BAO). The results shown that the CGP model does not correspond to accelerating expansion
conditions. In the CGPP model, the results shown that the CGPP model is correspond to accelerating expansion
conditions. Finally, the values of the equation of state parameter coming from both CGP and CGPP models
are the same and match all observational data under certain conditions.
Keywords: Dark Energy, Accelerating Universe, Chaplygin Gas, Power-Law

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

PHY-O-11 73

Development and Study an Efficiency of Automatic Spraying by DIY CNC Machine

Wongsakorn Auampakdee1, Nichapa noiin1 , Maneeket Roblok2, Kanyarat Mingmitr3 and Chainarong Raktham1,*
1Faculty of Education Uttaradit Rajabhat University 27 Injaimee Road, Tha-it Sub-District, Muang District, Uttaradit, 53000
2Ban Kaeng Wittaya School 343 Moo 1, Ban Kaeng Subdistrict, Si Satchanalai District, Sukhothai Province 64130
3Phitsanulok Pittayakom School Liang Muang Road, Tha Thong Subdistrict, Mueang Phitsanulok District, Phitsanulok 65000
*Corresponding author e-mail: [email protected]

This research was aimed to develop and study an efficiency of automatic air brush with Do it Yourself (DIY )
Computer Numerical Control (CNC). CNC. Firstly, its parts were designed by Tinkercad program and printed
with 3D printer. Secondly, the CNC was mainly conducted by Arduino UNO R3. Furthermore, CNC Shield V3
controlled stepper motors simultaneously in three axesi, and the solenoid valve switched on the circuit of air
flow. Air brush spray is controlled by solenoid valve to limit air flow rate in conjunction with Arduino IDE and
Laser GRBL programs to design spray characteristic and direct the air brush spraying direction. DIY CNC spray
characteristic was sprayed at stages 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 mm respectively and air flow
rates of 0.5, 1, 1.5, 2 and 2.5 mm respectively.
DIY CNC machine controls X-axis, Y-axis and Z-axis, the spray distance is exactly as specified. By adjusting
the motor rotation rate in the X axis at a distance between 10 mm to 40 mm equal to 705.836 step / mm and
at a distance between 50 mm and 100 mm equal to 746.900 step / mm and adjust the motor rotation rate to
be in the Y-axis every distance Equivalent to 793.464 step / mm, the mean spraying tolerances in the X and
Y axes were 0.04 mm and 0.05 mm respectively, and flow rates at threads of 0.5, 1, 1.5, 2 and 2.5 mm
respectively were 0.010, 0.022, 0.044, 0.048, and 0.056 cm3 / s respectively.

Keywords: Automatic spraying, Application of CNC machine, DIY CNC Machine

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตร์วิจัย คร้งั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-12 74

Improvement of Roof Thermal Performance Using Phase Change Materials for Energy
Conservation in Building

Chanita Mano and Atthakorn Thongtha *
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
* Corresponding author email: [email protected]

This research investigates and improves the thermal behavior of metal roofing sheet installed with phase
change materials (PCMs) layer. The four PCMs as paraffin type with different melting points were encapsulated
and integrated into the roof to decease heat transfer through building. The thermal characteristics of PCMs
were analyzed by differential scanning calorimeter (DSC). It was found that the melting points of PCMA, PCMB,
PCMC and PCMD were approximately 45°C, 50°C, 55°C and 59°C, respectively. The exterior roof surface
temperature was controlled at 50°C, 60°C and 70°C by a thermal source (halogen lights) for 360 min to
investigate the thermal behavior and compare insulation properties of the metal sheet roofing installed with and
without PCMs layer. The results showed that the metal sheet roofing installed with PCMD layer could reduce
the room temperature by up to 2.8%, 1.4% and 1.0% when compared with the metal roof without the PCM
layer at the controlled exterior roof surface temperature of approximately 50°C, 60°C and 70°C, respectively.
The thermal storage of PCMs caused a delay in heat transfer through from the exterior roof surface into the
testing room. It indicated that the installation of PCMs layer with metal sheet roofing would lead to the saving
of electrical energy consumed by the cooling load and yearly peak cooling requirement in the buildings.
Keywords: Metal sheet roofing, Phase change materials, Thermal behavior, Energy saving

การประชุมวชิ าการระดับชาติ วิทยาศาสตร์วิจัย คร้งั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-13 75

Area-based Assessment of Solar PV Rooftop installation potential: A case study of
Chulalongkorn University

Boonyanuch Krikun 1,* and Thitisak Boonpramote2
1 Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330
2 Department of Mining and Petroleum Engineering, Chulalongkorn University, Bangkok, 10330
* Corresponding author email: [email protected]

This research aims to assess the applicable rooftop area with a potential for solar PV rooftop installation in
the case study area of Chulalongkorn University. Determine the suitable building with potential by applying
the limitations of solar rooftop such as roofing structural and shading which affects the installation process
and system energy production. Utilising the Geographical Information System (GIS) to assess the applicable
area and using software for technical potential analysis. In conclusion, the result represents that 86 out of
216 buildings at Chulalongkorn University are suitable rooftop for solar PV installation. The rooftop area is a
total of 110,191.68 sqm. where 21,793 PV panels can be installed on the rooftop surface. (approximately
50843.56 sqm.) Therefore, the overall annual energy production is approximately 12,141.86 MWh.

Keywords: Solar PV system, Potential assessment, Solar PV rooftop

การประชมุ วชิ าการระดับชาติ วทิ ยาศาสตร์วิจัย ครงั้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-14 76

Investigation of Light Transmission Performance of Vertical Light Pipe Integrating into
Roof for Reducing Energy Consumption Demand in Buildings

Jiraphorn Mahawan and Atthakorn Thongtha*
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
* Corresponding author e-mail: [email protected]

This work investigates the light illumination intensity, light transmission performance, light distribution on the
floor, and daylight factor of vertical light tubes at various incident elevation angles of a light source. The light
tubes were made from commercial aluminum alloy sheets and commercial zinc alloy sheets to investigate
internal illuminance of buildings and reduce the demand of electrical energy from artificial lighting. The vertical
light tubes with a constant length of 0.5 m and the diameters of 0.20, 0.25, and 0.30 m were designed in a
testing room model, with dimensions of 1 m x 1 m x 1 m. A 20 W light-emitting diode (LED) lamp was used as
the light source for the lighting simulations, which was placed away from the top of the light tube. The incident
elevation angle of the light source was changed between 0Oand 80O with 10O increments. It was found that the
elevation angle of the incidence light had an influence on the light intensity distribution on both ends of light
tube. The average illuminance performance of both material types increased with an increase of the incidence
angle from 0O to 80O. The commercial aluminum alloy tube promotes greater light transmission and daylight
factor when compared with the commercial zinc alloy tube in each condition. This illuminance measurement
demonstrates that the light tube could be included in the lighting systems of some deeper or windowless areas
of buildings to decrease the demand of energy consumption in the lighting of buildings.
Keywords: Light pipe, Illumination, Daylight factor, Vertical light tubes.

การประชุมวิชาการระดับชาติ วทิ ยาศาสตรว์ จิ ัย คร้งั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-15 77

Feasibility Study of Hybrid System between Biomass Power Plant and Floating Solar Panels
(Case Study)

Wardfhun Sanandang 1,* and Thitisak Boonpramote2
1 Energy Technology and Management, Graduate School, Chulalongkorn University, Bangkok, 10330
2 Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330
* Corresponding author email: [email protected]

According to a problem of insufficiency of biomass fuel power plant which is 40 MW size, we find ways to
produce electricity to comply with the contract. We focus mainly on fuel consumed reduction. That is the
reason that we study the hybrid system between floating solar and biomass power plant, which can reduce
the usage of bagasse fuel during the day by utilizing the area of water reservoir. From the initial hypothesis,
we can be use the benefits derived from the fuel saving to calculate financially to determine the floating
solar panels project which is 2.5 MWpdc size. Therefore, the capital expenditure (CAPEX) is 79 million THB
and the operating expense (OPEX) is 333,000 THB per year. The benefit of fuel -saving 7,200 ton per year
of bagasse fuel usability, which the cost 7.2 million THB per year. From all previous information, the DCF
Model of this project is evaluated. The NPV and IRR are 23.33 million THB and 10.06%, respectively.
Accordingly, the PB is 8.8 years. From all the financial index, this project is a worthy investment and
management.
Keywords: feasibility study, hybrid system, biomass power plant, floating solar

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

PHY-O-16 78

Feasibility Study of Industrial Waste Power Plant: A Case Study

Siri Siroikam 1,* and Thitisak Boonpramote2
1 Energy Technology and Management, Graduate School, Chulalongkorn University, Bangkok, 10330
2 Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330
* Corresponding author email: [email protected]

An increasing in industrial waste causes the negative impact to healthiness and environment significantly. The
government is aware of the situation and needs to increase the performance of industrial waste management.
The strategy to set the price of electricity purchasing in a special rate for industrial waste power plant is
implemented. This investment scheme is used to draw an attention from the new investors. The purpose of
this research is to conduct the feasibility study of the industrial waste power plant by using DCF model. The
result of this study reveals that the net present value is 1,919 million Thai Baht, internal rate of return is 24.98%,
benefit-cost ratio is 2.05 and payback period is 3.81 years. As a result, the project is feasible to invest.
Keywords: feasibility study, industrial waste power plant, waste management

การประชุมวิชาการระดับชาติ วทิ ยาศาสตร์วิจัย คร้ังที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

PHY-O-17 79

Measurement of Potassium Ferricyanide Concentration in Electrolyte Solution using
Cyclic Voltammetry by Frequency Domain Approach

Phumin Rodpun 1 Siwa Srathongkao1 Wanasanan Ngamsapmanee1 Nuttakrit Somdock1 and Bhanupol Klongratog1*
1 Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520
Corresponding author, email: [email protected]

In this study, electrochemical properties were studied. In this work, the important component observed by
researchers was electrodes. The purpose of this study is to develop a carbon-based material, it’s a pencil lead
was design and construction of the analysis system, using cyclic voltammetry technic. The experiment is divided
into two stages, the first is the determination of the best parameters of carbon materials. The experimental
results show that the pencil with different Intensity was from 2H HB B 2B 4B and C. In the experiment, the
potential from 1 – 5 Vp-p was added to to the cyclic voltammetry circuit in which the electrodes work immersed
in the Potassium Ferricyanide electrolyte solution at a concentration of 3 mM. Since the slope of the graph is
3.611, this indicates that the b value is the fastest. R-square is equal to 0.8056. In the second stage, the
performance of the working electrode was tested by measuring the concentration of the solution By using a B
intensity pencil lead, the electric potential supplied to the cyclic voltammetry circuit was 2 Vp.p and the
concentration of the electrolyte solution was change from 1 - 3 mM. In addition, when the electrolyte solution
concentration was increased the anodic current is also increased. R-square is equal to 0.9992 That is, the
concentration of potassium electrolyte solution Ferris cyanide is proportional to the anodic current. Which is
theoretical.

Keywords: Electrochemical, Cyclic voltammetry, Duck-shaped voltammograms, Potassium Ferricyanide
concentration

การประชมุ วชิ าการระดับชาติ วิทยาศาสตรว์ ิจัย ครัง้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-18 80

An electronic electroscope using n-channel MOSFET and Op-Amps

Pongsak Khokhuntod1,* and Anucha Kaewpoonsuk1
Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, Thailand, 65000
 Pongsak Khokhuntod, email: [email protected]

In this study, the invention of an electronic electroscope is used for electrostatic experiments and
demonstrations. The design is based on an n-channel metal-oxide-semiconductor field-effect transistor
(MOSFET) to indicate the positive or negative charges of the tested objects. We also used the operational
amplifiers (Op-Amps) to supply voltage to the gate and drain terminals of the MOSFET. With this technique,
the electroscope can detect both positive and negative charges without a p-channel MOSFET requirement. It
is used to detect the charges from three methods: object rubbing, induction with discharge, and biasing the
various voltages to the conductor. The results from all methods are consistent with the electromagnetic principle.
Keywords: electronics electroscope, determining polarity of charge, charge sniffer, electrostatic
demonstration

การประชุมวิชาการระดับชาติ วิทยาศาสตรว์ ิจัย ครั้งที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-19 81

Development and Study an Efficiency of DIY Blue Photoluminescence Detection
Device using RGB Sensor and Light intensity Sensor together with Arduino ESP
32 and OSRAM Color Calculator.

Songwoot Songsuebwattanakun1, Dechathorn Wongchai1, and Chainarong Raktham1,*
1 Faculty of Education Uttaradit Rajabhat University 27 Injaimee Road, Tha-it Sub-District, Muang District, Uttaradit, 53000
* Corresponding author e-mail: [email protected]

The objective of this research is to develop a DIY Blue Photoluminescence Detection Device for detecting the
wavelengths of blue fluorescence and to study the intensity measurement of white light and ultraviolet elements.
The tool is designed with a 365 nm wavelength UV generator to stimulate the fluorescence and measure the
intensity of the white light component to tristimulus RGB values with the TCS 230 sensor and the ultraviolet
rays with the GY-30 sensor through the commands of the Arduino IDE program on. Arduino ESP 32. Data is
displayed by 1 6 * 2 I2 C LCD screen, taken Tristimulus value and wavelength analysis with OSRAM Color
Calculator v7.77 program, test for measurement of ultraviolet intensity at a distance of 1.5-7.0 cm and test for
efficiency of white light element intensity using LED bulbs of 6 2 0 nm, 5 2 5 nm and 4 7 0 nm wavelength
respectively for red, green and Blue in order Both with a color filter and a color filter Calculate the wavelength
and compare it by percentage of tolerance.
It was found that the ultraviolet intensity of the 365 nm UV generator was inversely proportional to the distance
at a distance of 1.5 cm. To 7.0 cm, and that the measured ultraviolet intensity was more stable than a 365 nm
UV flashlight. It is the light source of the DIY Blue Photoluminescence Detection Device, and the blue light
measurement efficiency has an error of 2.91%, but the green light measurement has a 4.08% error.

Keywords: DIY Blue Photoluminescence Detection Device, DIY Blue Photoluminescence Detection
Development, DIY Blue Photoluminescence Detection Device RGB Measurement Performance

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตร์วิจัย ครง้ั ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

PHY-O-20 82

Reduce ambient light contamination in blood oxygen saturation measurement with sine
wave LED lamp stimulation technique

Anucha Kaewpoonsuk1,*, Sukkan Sudtana1 and Noppadon Sisuk1
1 Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000
* Corresponding author email: [email protected]

This paper presents the reduce ambient light contamination in blood oxygen saturation measurement with
sine wave LED lamp stimulation technique by stimulating red and infrared LEDs with a sinusoidal frequency
of 700 Hz and 1000 Hz respectively. The principle is that light from a led tube is passed through the fingertip
area and the absorption light is measured with a light sensor. The light sensor output is an amplitude
modulated signal with a pulse rate signal as a message signal wave and a sinusoidal wave that is used to
excite the LED as a carrier wave. Due to the proposed technique, the frequency of the sinusoidal wave
signal used to excite the LED lamps is in the range that does not match the frequency of the ambient light,
therefor the ambient light does not contaminate the signal at the output of the light sensor. The output signal
is then signal processing to calculate the blood oxygen saturation according to the principles of Beer's Law
and Lambert's Law. Then the proposed blood oxygen saturation meter was tested on 20 subjects. When
testing by Paired Samples Test, the results was found that the blood oxygen saturation obtained from
Commercial blood oxygen saturation meter and proposed blood oxygen saturation meter were not statistically
different at p value < 0.05 and accuracy at 98.5 %.
Keywords: Blood oxygen saturation, Beer's Law, Lambert's Law, Pulse oxygen saturation

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

PHY-O-21 83

Electricity meter reading device based on computer vision technique

Kriangsak Prompak* Wasan Wichai Sukkan Sudtana
Department of Physics, Faculty of Science, Naresuan University
Corresponding author, email: [email protected]

This research has designed and constructed a meter reading device using computer vision techniques to
reduce the error reading of the electric meter due to taking the numerical value from the electricity meter by
human and it also reduces the steps in collecting electricity usage data. In this work, the Raspberry Pi board
is used to control functions and processing. In the proposed system, there is a digital camera module that
captures the power meter. Then find the position of numbers within the image using the template matching
principle. The numeric readings read after processing are displayed on the TFT screen. In addition, this
numerical value can be saved at every 1 minute via WiFi. From testing the 0 - 9 numbers of a 5 - digit electric
meter, it was found that all numbers were validated. And when we tested the device continuously for 3 hours,
we found that it was able to get accurate readings.
Keywords: computer vision, Raspberry Pi, template matching

การประชุมวชิ าการระดับชาติ วทิ ยาศาสตรว์ ิจัย คร้ังท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

Oral Presentation

กลมุ่ ที่ 7
สาขาวิชาวทิ ยาศาสตร์นวตั กรรมเชงิ พาณชิ ย์

การประชุมวิชาการระดบั ชาติ วิทยาศาสตร์วิจัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร

INNO-O-01 84

The Fabrication of easy-to-use FDM 3D Printing Machine

Nutchapol Kongwiwattanakul 1 and Thanongsak Thepsonthi 2*
1 Piboonbumpen Demonstration School, Burapha University Chon Buri, 20131
2 Faculty of Engineering, Burapha University, Chon Buri, 20131
*Corresponding author email: [email protected]

In recent years, 3D printer plays an important role in the production of parts used in everyday life due to their
flexibility and versatility. However, the use of 3D printers is quite difficult, for example, the base level must be
set before printing, running out of plastic filament during printing cause part failure. Therefore, this research
was to design and fabricate the Fused Deposition Modeling (FDM) 3D printer. It was designed 3D printer with
Autodesk Fusion 360 that consist of a BL-touch sensor to set the printer base automatically, a limit switch to
notify exhausted plastic filament, and the E3D Hemera extruder to print more materials compared to
conventional printer. The experimental have consist of print an object that measure 200 mm x 200 mm with
0.6 mm thickness, cut the plastic filament while printing a cube object, and printed an astronaut test object per
one material and compared with Ender 3 3D printer at the same setting. For the results of the study, it can be
seen that the parts printed from the modified-3D printer were of higher quality and accuracy than the
conventional printer. Poly lactic acid (PLA), Acrylonitrile butadiene styrene (ABS), Polyethylene Terephthalate
Glycol (PET-G), and Thermoplastic Polyurethane (TPU) can be utilized as printing materials in the modified-
3D printer. It can be reduced cost and made it easy to use with more efficiency than to conventional printer.
Keywords : 3D Printer, Fused Deposition Modeling, BL-touch, E3D Hemera, Autodesk Fusion 360

การประชุมวชิ าการระดับชาติ วิทยาศาสตร์วจิ ัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

INNO-O-02 85

Title A Low-cost Cushion for Reducing Long Sitting Sedentary Period

Ponpisut Worrajiran1, Punyawan Lampaopong2*, Aekarat Sonsri1 and Rapeepat Pleangson1,
1 Department of Electrical and Computer Engineering, Naresuan University
2 Department of Mechanical Engineering, Naresuan University
* Corresponding author, e-mail: [email protected]

Sedentary behaviour refers to the behaviours of having physical activities that require low energy expenditure
for a long period, for example, sitting to use a mobile phone or computer for long period to work or spend
leisure time. These activities are recently very common. However, for a long term, sedentary behaviours
may cause serious harm on the body and result in health problems. This research aims to develop a device
to assist in reducing sedentary period. The device, which is a cushion, will collect the sitting data and vibrate
when a sitting time of a user exceeds the recommended period. It works with a mobile phone application
developed to display the sitting data, a warning message, and sound alarm to notify the user to c hange their
posture or bodily movement. The cushion consists low-cost components, which are a microcontroller board,
4 load cells installed at the 4 corners of the cushion and a vibration motor attached at the centre of the
cushion. The cushion was tested at several operating conditions i.e. under the weights from 0 to 80 kg
placed at the centre of the cushion, under the weight of 20 kg placed near the location of each load cell one
at a time, and under 80 kg weight left on the cushion for 8 hours. In all cases, the results showed overall of
0.02 - 0.46% accuracy of the load cells. The cushion could collect the sitting data and vibrated at a proper
time. The mobile phone application could display the sitting data and notify the user, as it was designed.
Keywords: Cushion, Seating, Sedentary behaviour, Microcontroller, Load cell

การประชุมวชิ าการระดับชาติ วิทยาศาสตรว์ จิ ัย คร้ังท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

INNO-O-03 86

The development of fattening pig cost record system of Boonmee farm 30 Co., Ltd.

Adul Phuk-in*, Janjeera Promthong, Amornwan Inchuen, Singkom Wuttichart, Budsara Kongsak, Pakamas Phuk-in
*Industrial Technology Program, Faculty of Industrial Technology, Uttaradit Rajabhat University. 27 Injaimee Road,
Tha-It Sub-District, Mueang District, Uttaradit Province.
Professor, Bachelor of Technology, Program in Accounting, Uttaradit Vocational College. 9 Padva Road, Tha-It Sub-District,
Mueang District, Uttaradit Province Tel. (055) 411221.
*Correspondent author Tel (055) 416625, E-mail : [email protected]

The objectives of this research on the development of fattening pig cost record system of Boonmee Farm 30
Co., Ltd. are as follows : to study on general condition and data on fattening pig cost as well as to develop
fattening pig cost record system of Boonmee Farm 30 Co., Ltd. From studying on problems of the company, it
was found that there was no systematical fattening pig data storage. Consequently, it was necessary to spend
a long period of time to search for fattening pig cost data. In addition, breeding cost was also unable to be
defined. Therefore, the researchers developed fattening pig cost record system by using package software to
record data on fattening pig cost of 3 pig houses including Pig House F14, Pig House F15, and Pig House
F16. Fattening pig cost was collected from data on transfer cost from sow farm to feed and medical supply
cost, farming cost, and distribution cost. The results revealed that fattening pig cost of Pig House F14 was
4,071,376.11 baht with 573 pigs and farming cost of 7,105.37 baht per pig. The fattening pig cost of Pig House
F15 was 4,275,661.42 baht with 578 pigs and farming cost of 7,397.34 baht per pig. The fattening pig cost of
Pig House F16 was 4,343,487.21 baht with 589 pigs and farming cost of 7,374.34 baht per pig. To distribute
pigs of 3 pig houses, it was found that Pig House F16 had the highest sale volume of 5,144,587.50 baht
followed by pig House F15 with sale volume of 4,876,798 baht and Pig House F14 with sale volume of
4,855,943 baht. After deducting fattening pig cost, it was found that Pig House F14 earned the highest profit
level of 16.16 % followed by Pig House F16 with profit of 15.57 % and Pig House F15 with profit of 12.33 %.
Therefore, the results of this research met with the objectives and they could be applied to manage Cost
Account System of Boonmee Farm 30 Co., Ltd.

Keywords : development of cost record system, fattening pig farming, Pig House F14, F15, and F16

การประชมุ วิชาการระดับชาติ วิทยาศาสตร์วจิ ัย ครั้งท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

INNO-O-04 87

Utilization from mushroom loaf waste with coffee grounds to promote mushroom
production technology in community

Suteera Suntararak1* Chotika Kokram2 Pattarwadee Panngam3 and Pattarawit Prungreenoo4
1,2,3 Department of Environmental Science, Faculty of Science Rajabhat Buriram University, Buriram. 31000
4 Department of Environmental Science, Faculty of Science, Khon Kaen University, Khon Kaen. 40002
* Corresponding author e-mail : [email protected]

The utilization from mushroom loaf waste with coffee grounds to promote mushroom production technology in
community, this experiment aims to study the growth and compare the ratio of old mushroom loaf waste and
coffee grounds that are suitable for hungary oyster (Pleurotus osttreatus (Fr.) Kummer) mushroom use.
Experimental studies in cultivation material including mushroom loaf waste, coffee grounds and rubberwood
sawdust for 6 experiments - first experiment used 100 % of rubberwood sawdust, the second experiment used
100 % of mushroom loaf waste, the third one used 100 % of coffee grounds, the forth one used 50 % of
mushroom loaf waste mixed with 50 % of coffee grounds, the fifth one used 75 % of mushroom loaf waste
mixed with 25 % of coffee grounds and the last one used 25 % of mushroom loaf waste mixed with 75 % of
coffee grounds. All experiments were analyzed for chemical properties, nutrients in substrates for mushroom
growing and yield of mushroom. The results showed that each type of mushroom substrate with different
humidity (7.63±0.00b - 9.37±0.00a %). pH (5.02±0.06b - 5.97±0.00a) is suitable for use as a mushroom
cultivation material. The nutrient content was related to the amount of coffee grounds in a reasonable ratio.
Yield of hungary oyster found in any treatments. Especially in experiment 5 (75 % of mushroom loaf waste
mixed with 25 % of coffee grounds) is more suitable for hungary oyster cultivation which compared to the other
treatments because of highest yield mushrooms (83.05±14.02a grams per mushroom loaf).

Keywords: Hungary Oyster//Mushroom Loaf Waste//Coffee Grounds//Mushroom Production Technology

การประชุมวชิ าการระดับชาติ วิทยาศาสตรว์ ิจัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

INNO-O-05 88

The development of child sleeping pad of rubber foam with addition silver nanocomposite

Sasitorn Rakthong 1,* and Wisaruta Butburee2
1 Paphayompittayakom school, SCiUS – Thaksin university, Phatthalung, 93210
2 Paphayompittayakom school, SCiUS – Thaksin university, Phatthalung, 93210
* Corresponding author email: [email protected]

When used a child sleeping pad for a long time, there is a large accumulation of bacteria. In this research, to
develop a child sleeping pad that can inhibit pathogenic bacteria with silver nanoparticles. The silver
nanoparticles will react with the sulfhydryl group of the protease enzyme of the bacterial cell. That acts on the
metabolism of cells. Causing the enzyme processes to stop working and degrade. This research will study the
antibacterial efficacy at concentrations of silver nanoparticles are 0, 2000, 4000, and 6000 ppm. Results from
SEM showed that the resulting porosity of rubber foam was a similar size and confirm the persistence of silver
nano in rubber foam with EDS techniques. Silver particles were found in rubber foam and silver particles were
well dispersed. Physical properties analysis from ISO 2781 found that the density of rubber foam would be
suitable for BMI values for children between 1-3 years. Results from mechanical properties tests showed that
the tensile and modulus analysis from ASTM D412-80 (Die C). In addition silver nano, rubber foam was found
to be effective in inhibiting staphylococcus aureus and Staphylococcus epidermidis well and bacterial inhibitory
performance improves when there is a greater amount of silver nano.
Keywords: rubber foam, silver nano, antibacterial

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย คร้ังท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลัยนเรศวร

INNO-O-06 89

Chemical fertilizer inventory management by forecasting method. Case Study :
Chai Fa Kasetpun Company Limited.

Adul Phuk-in*, Sukanya Manim, Kodchaporn Klangwichian, Pakamas Phuk-in, Budsara Kongsak
*Industrial Technology Program, Faculty of Industrial Technology, Uttaradit Rajabhat University. 27 Injaimee Road,
Tha-It Sub-District, Mueang District, Uttaradit Province.
Professor, Bachelor of Technology, Program in Accounting, Uttaradit Vocational College. 9 Padva Road, Tha-It Sub-District,
Mueang District, Uttaradit Province Tel. (055) 411221.
*Correspondent author Tel (055) 416625, E-mail : [email protected]

This research has managed the inventory of Chai Fa Kasetpun Company Limited by forecasting method. From
site survey, there were problems with inventory management of 9 chemical fertilizer brands, which are worth
more than 300 million baht per year. Therefore, the historical sales data from January 2019 to December 2019
are used for 4 forecasting formulas, specific and comparative, using the Mean Absolute Deviation (MAD) and
the actual sales results in January and improving weighted forecast values in February 2020. From the
research, it was found that Gap of the actual sales forecast for January was -23,361 sacks, indicating insufficient
chemical fertilizer sold and without chemical fertilizer inventory. This research has improved the forecasted
values of the chemical fertilizers had the total Gap of 17,121 sacks. Therefore, this result of research can be
used as good information for inventory management of Chai Fa Kasetpun Company Limited.
Keywords : chemical fertilizer sales, chemical fertilizer forecasting, Mean Absolute Deviation

การประชมุ วิชาการระดับชาติ วทิ ยาศาสตร์วจิ ัย ครั้งท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

Oral Presentation

กลมุ่ ท่ี 9
Routine to Research สายสนบั สนุนเครอื เทางาม

การประชุมวชิ าการระดบั ชาติ วิทยาศาสตร์วจิ ยั ครงั้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวทิ ยาลยั นเรศวร

R2R-O-01 90

The customers’ opinions on administration of the official documents in School of Science
University of Phayao using Line@ Application

Sita Thianwan1,*
1 Office of the Secretary School of Science, University of Phayao, Phayao, 56000
* Corresponding author email: [email protected]

The aim of this research is to study (1) the opinions of service users towards the administration
of administrative work with the LINE@ application held by School of Science, University of Phayao.
(2) Also the study aims to examine problem and suggestions. The study collected questionnaire samples from
the target population. The study population is staff of the Faculty of Science, University of Phayao, 110 people,
consisting of 74 academic staff and 36 supporting staff. A random sampling was performed with the sample
size 46 people. They were academic and support staffs. Statistical methods used to analyze the data were
percentage, mean and standard deviation. The results from the study revealed that most respondents there
are opinions about the application of the application system is not complicated and easy to use. And procedures
for using the application services can actually use with an average of 4.64, the operating system forms the app
offers easy-to-use with an average of 4.62, the operating system of the application is convenient and fast to
use with an average of 4.55, applications help reduce the amount of time to search for documents forms with
an average of 4.51, the contents of the form are suitable with an average of 4.49, Screen design is appropriate
with an average of 4.47, the attractiveness of applications with an average of 4.21, information of the application
system is complete, easy to remember with an average of 4.13, and publicity in using applications with an
average of 3.87, respectively. Overall the level of opinion was “very well”. The most common problems were
administration document form is distributed according to departments, divisions, and various faculties, causing
delays in retrieving data for use. Also, it was recommended to improve the public relations in using applications.

Keywords: Management, Administrative Work, Application LINE

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ ิจัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

R2R-O-02 91

Development of database System for educational organization enhance the management
efficiency of the Faculty also allowed with the mission of Science faculty

Phataraporn Phondee 1,*
1 Office of the Secretary School of Science, University of Phayao, 56000
* Corresponding author email: [email protected]

The research problem deal with accessing to Quality Assessment (QA) data and delivering data base to
program committee and head of Division.
The tools of this study were pre and post recording form, office 365, document date table, and database
stones map using PDCA system. The population of this study consists of 6 criteria head and 9 support staff.
The results found that database on office 365 system was designed including document data table and data
stores map. This designed system was allowed to mission of excellent organization and aligned with EdPEx,
AUN-QA and OHEC as well as common data set. The system was evaluated following step
1) Upload individual criteria data three year back (2560, 2561, and 2562) responding to database stores
map and can edit the data for correcting and up to dale by criteria support staff.
2) The entitled staff download all data to analyzed, benchmarked and prepared SAR report for assessment
led to enhance the quality of all action that allowed to the mission subjecting to excellent organization.
Furthermore, mapping the criteria of faculty and program level was also used in this system.
3) Evaluation of the effectiveness and the of use the system including uploading downloading process,
friendly use and reduced multi-step finding as well as the duplicated data. Focus group was used to evaluate
the system by QA program committee indicated that the developed system is also allowed with the mission
of Science faculty.

Keywords: Education Quality Assurance, data system, UP office 365, EdPEx, AUN-QA

การประชุมวิชาการระดับชาติ วิทยาศาสตร์วิจัย ครัง้ ท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลัยนเรศวร

R2R-O-03 92

Optimization of Paramecium caudatum Cultivation Condition Using Agricultural Wastes

Songklod Baiya1, Bongkoj Boonburapong2, and Surasak Laloknam2*
1 Department of Biology, Faculty of Sciences, Srinakharinwirot University, Bangkok, 10110
2 Department of General Science, Faculty of Sciences, Srinakharinwirot University, Bangkok, 10110
* Corresponding author email: [email protected]

This research aimed to optimize the cultivation of Paramecium caudatum isolated from the Saen Saep canal
near Srinakarinwirot University. Agricultural wastes, sugarcane molasses (SGCM), soybean meal (SB), and
rice straw (RS) were used as carbon and nitrogen sources in the culture medium. Total reducing sugar and
total protein contents of agricultural waste stock solutions were determined. The results showed that SGCM
contains the highest total reducing sugar content and following SB and RS. SB had the highest total protein
content and following SGCM and RS. The impact of the agricultural waste culture medium on P. caudatum
growth was conducted by varying concentrations of each agricultural wastes, 0. 0.1, 0.5, 1.0, 2.0, 5.0 และ 10.0
%(w/v). The optimal concentrations of each agricultural wastes are 0.1%(w/v) of SGCM, 1.0%(w/v) of SB, and
1.0%(w/v) of RS, respectively. The impact of the combination of agricultural wastes medium (0.1%(w/v) of
SGCM, 1.0%(w/v) of SB, and 1.0%(w/v) of RS) on P. caudatum growth was investigated compared with each
agricultural waste medium. The P. caudatum growth in combination medium was significantly increased
compared with single medium. The effect of pH (pH 4 – 10) and temperature (10 – 40 C) on P. caudatum
growth were determined. The optimal cultivation condition of P. caudatum was cultivated in the combination of
agricultural wastes medium with pH of 6.0 and temperature ranged between 25 and 30°C. This finding indicated
that this new modification agricultural wastes culture medium is suitable for P. caudatum growth used in
ecotoxicological studies and animal feed production.
Keywords: Paramecium, Culture medium, Agricultural wastes

การประชุมวชิ าการระดับชาติ วิทยาศาสตร์วจิ ัย คร้ังที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

R2R-O-04 93

Motivation for Routine to Research (R2R) Developing of Academic
Supporting Staff in Faculty of Science Burapha University.

Sub.L.T.Kiatsada Poompeng*1
1 Faculty of Science, Burapha University, Chonburi, 20131,
* Corresponding author email: e-mail: [email protected]

The study of the motivation for routine to research (R2R) developing of academic supporting staff in Faculty of
Science Burapha University. The aims of this research to evaluate the incentives of academic supporting staff
in routine to research (R2R) development by comparing the level of attention and personal status. The collected
information will be used for projects or activities management to promote the R2 R developing of academic
supporting staff. The data was collected from 6 3 academic supporting staffs in Faculty of Science by using
questionnaires. The statistical parameters used for data analysis consist of frequency, percentage, mean and
standard deviation by using t- test and analysis of one- way ANOVA ( one- way ANOVA) . The LSD ( Least-
Significant Different) was used for tested the post-hoc at the statistical significance level of LSD is 0.05.
The results showed that the motivation for routine to research (R2R) developing of academic supporting staff
in Faculty of Science Burapha University was at high level. The comparison of motivation by classification of
personal status, gender, age, education level and the duration of the operation are not different and related on
the requirements of development of R2 R at a statistically significant level of 0 . 0 5 . On the other hand, the
analysis of difference of type of personnel showed the significant difference at a low to moderate level with
statistical significance at the 0. 05. Interestingly, the results showed that the motivation for routine to research
( R2 R) developing of academic supporting of office personnel were higher than the scientist, researcher and
laboratory technician. These results can be used as information for considering the preparation of work
planning, projects or activities management to promote incentives in conducting the routine to research (R2R)
developing of academic supporting staff in each personnel category.

Keywords: Motivation for Routine to Research (R2R)/ Academic Supporting staff in Faculty of Science
Burapha University.

การประชมุ วชิ าการระดับชาติ วิทยาศาสตรว์ จิ ัย ครัง้ ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

R2R-O-05 94

Participation Study on the Strategic Action Plan of Personnel at Faculty of Science,
Srinakharinwirot University

Sanya Palun
1Dean’s office, Faculty of Science, Srinakharinwirot University, Bangkok, 10110
* Corresponding author email: [email protected]

This research aimed to study the participation on strategic action plan of personnel (PSAPP) at Faculty of
Science, Srinakharinwirot University. The research tool was questionnaire of PSAPP, composed of 1) Basic
introduction, 2) Participation information (planning, doing, checking, and action) and 3) Problem and solving
(understanding, IT applying, project management and communication). Sample group was 140 personnel of
Faculty of Science using random sampling from 230 personnel. Data was analyzed using percentage, mean
and standard deviation. The results showed that sample numbers were executive staff (ES) (7.86%), academic
staff (AS) (59.29%) and academic support staff (ASS) (32.85%). The PSAPP level was medium level (x̅ =
3.18, SD = 0.57). The problem and solving level was medium (x̅ = 3.73, SD = 0.7 7). The ES had the highest
understanding of strategic action plan (x̅ = 4.32, SD = 0.69) and following AS (x̅ = 3.16, SD = 1.02) and ASS
(x̅ = 2.95, SD = 1.33). The problem and solving on strategic action plan of personnel level was medium level
(x̅ = 3.97, SD = 1.09). The ES had the highest understanding of problem and solving (x̅ = 4.40, SD = 1.10)
and following ASS (x̅ = 3.88, SD = 1.15) and AS (x̅ = 3.62, SD = 1.01). The conclusion showed that ES had
higher PSAPP than AS and ASS. The finding suggested that ES represented deeply understanding and
decision of strategic action plan and should communicate the PSAPP to AS and ASS.
Keywords: Participation, Strategic Plan, Action Plan

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

R2R-O-06 95

Classification of Asteraceae in the University of Phayao accordance with vegetative
characters and leaf images

Narumol Boonrueng1*
1Department of Biology, School of Science, University of Phayao, Phayao, 56000
Corresponding author, email: [email protected]

Several species of Asteraceae were used for medicinal herbs; however, it is challenging due to the difficulty in
identifying the plant to species because of its very small floret and using some specific technical terms. In this
study, the vegetative characters of Asteraceae found in the University of Phayao were classified by comparison
with leaf images. Tree plants from each species of the Asteraceae were collected and identified to species by
taxonomic keys. The vegetative characters were observed and classified to species or group by 12 students.
Twenty Asteraceae species were characterized by using their vegetative characters including; shoot growth,
stem surface, white latex presence, amount of leaf per node, leave characterization, petiole presence, amount
of primary vein, leaf surface, leaf base, leaf margin and leaf shape. Results showed 12 species and found 2
Blumea genera. The average of 6 correct species identification by comparison with the leaf images of biology
student was 4.8 ± 1.3 species (80%) more than in the non-biology student was 3.2 ± 0.4 (53%) statistically
significant (p<0.05).The results suggested that the classify accordance with vegetative characters and
comparison with leaf images can clarify the Asteraceae species identification in possibly.
Keywords: Asteraceae, Classification, Vegetative character

การประชมุ วชิ าการระดับชาติ วิทยาศาสตร์วจิ ัย คร้ังที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวิทยาลยั นเรศวร

Poster Presentation

กลุ่มท่ี 1
สาขาวิชาชวี วทิ ยาและการประยกุ ต์ วทิ ยาศาสตรก์ ารประมง
วทิ ยาศาสตร์สง่ิ แวดล้อม วทิ ยาศาสตร์การเกษตร วทิ ยาศาสตร์
สขุ ภาพ จลุ ชีววทิ ยา วิทยาศาสตรเ์ ทคโนโลยีชวี ภาพ ชีววทิ ยา
ประยุกต์ วิทยาศาสตรก์ ารอาหาร และเทคโนโลยีทางอาหาร

การประชุมวิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย ครั้งท่ี 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวทิ ยาลยั นเรศวร

BIO-P-01 96

Antioxidant effects of tea powder from Polygonum odoratum Lour.

Natcha Naktue1, Thitika Tammaya1, Kwanjira Jantakam1, Waraporn Yooin1 and Patcharawarin Ruanto1,*
1 Biology program, Faculty of Education, Chiang Rai Rajabhat University, Chiang Rai, 57100
* Corresponding author email: [email protected]

This research aimed to study antioxidant effects of Phak phai (Polygonum odoratum Lour.) whether it had
potential for a new Phak phai product development and to create a guideline of herbal tea drinking that
enhanced its beneficial properties. Different 3 powder sizes of Phak phai leaves were tested with 2, 2-Diphenyl-
1-picrylhydrazyl (DPPH) assay. The absorption at a wavelength of 517 nm was measured to calculate the half
maximal inhibitory concentration (IC50). It was found that IC50 values of tea powder of small (<1.0 mm), medium
(1.0-4.0 mm) and large (> 4.0 mm) sizes were 92.45, 97.38 and 99.42 mg / ml, respectively. The appropriate
brewing time was 3-5 minutes with IC50 equal to 96.77, 90.44 and 76.19 mg/ml respectively, providing
significantly better antioxidant capacities than those of less brewing time (1-2 minutes).The content of
chlorophyll a and b extracted from Phak phai by 99.5% concentrated acetone were 0.29 and 1.39 mg/gFW,
respectively.
Keywords: Antioxidant activity, Chlorophyll, Polygonum odoratum Lour., Tea

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

BIO-P-02 97

Effect of Drying Period on Total Phenolic Content, Beta-Carotene Content and Antioxidant
Capacity of Pumpkin

Pattachai Pinnak1,*, Nattaporn Peuwma1 and Pornthita Pijai1
1 Biology Program, Faculty of Science and Technology, Rajabhat Uttaradit University, Uttaradit 53000, Thailand
* Corresponding author email: [email protected]

Pumpkin (Cucurbita moschata Duchesne) contains beta-carotene and good to our health can be processed to
pumpkin powder. The aim of this research was to study the effect of drying period on total phenolic content,
beta carotene content and antioxidant capacity of commercial pumpkin that cultivate and sell in Uttaradit
province consist of 3 verities; Thong am-pai (TP) line, Kang Kok (KK) line and Koaw Tok (KT) line revealed
that all pumpkin line had beta-carotene content from 0.872-3.193 mg/gFW. TP line had the highest beta-
carotene. Constant drying at 55o Celsius for 36, 48, 60 and 72 hours, the results showed that beta-carotene
content was increased by increasing drying periods. Drying for 60 hours was suitable to use for dried pumpkin
and enhanced the antioxidant capacity by 2.3-fold compare with dried pumpkin with drying for 36 hours but no
significant difference was found in among the total phenolic content and beta-carotene content.
Keywords: Dried Pumpkins, antioxidant, beta-carotene

การประชมุ วชิ าการระดับชาติ วิทยาศาสตรว์ จิ ัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร

BIO-P-03 98

Toxicity and fumigation efficiency of essential oil from Daucus carota L. against Sitophilus
zeamais Motschulsky

Ruchuon Wanna1,*
1 Department of Agriculture, Faculty of Technology, Mahasarakham University, Maha Sarakham, Thailand, 44150
* Corresponding author’s email: [email protected]

Stored product insect pests are controlled by synthetic insecticides that causes adverse effects to human health
and the environment. Plants with insecticidal properties can be used as a source of these compounds to the
direct application in insect control, including the use of essential oil from plants. Essential oil from seed extracted
of carrot, Daucus carota L., has properties for protecting grains and products from insect pests by fumigation.
The aim of this research was to evaluate the fumigation toxicity, the fumigant and repellent activities, and the
repellent effect of D. carota essential oil against adult of maize weevil, Sitophilus zeamais Motschulsky. All
experiments were conducted under Completely Randomized Design (CRD) with 4 replications in laboratory
conditions. Result was found that the essential oil from D. carota seed had the LC50 of fumigation toxicity to
adult of S. zeamais with 19.60 µL/L air at 48 hours. Concentration of 64 µL/L air caused 100% adult mortality
of maize weevil at 72 hours after treatment and it was the highest significantly different (p<0.01). However, D.
carota essential oil was not the repellent effect on adult of S. zeamais. D. carota essential oil had the attracting
effect on adult of S. zeamais which gave less than 50% of repellent activity against S. zeamais. The essential
oil from seed extracted of D. carota was toxic to adult of S. zeamais by fumigation and it might be used as an
alternative bioinsecticide for grain protection against stored-product insects.
Keywords: Insecticidal activity, Maize weevil, Plant extract, Stored product insect control, Essential oil

การประชมุ วิชาการระดับชาติ วิทยาศาสตรว์ จิ ัย ครง้ั ที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วันท่ี 6-7 พฤษภาคม 2564 คณะวทิ ยาศาสตร์ มหาวิทยาลยั นเรศวร

BIO-P-04 99

Combination effect of BA and NAA on growth of in vitro shoot tip culture of Dendrobium
stuposum Lindl.

Anupan Kongbangkerd1, Onrut Inmano1, Narinthon Sudjai1 and Thanakorn Wongsa2,*
1Plant Tissue Culture Research Unit, Department of Biology, Faculty of Science, Naresuan University, Phitsanulok 65000
2Program in Biology, Faculty of Science and Technology, Kamphaeng Phet Rajabhat University, Kamphaeng Phet 56000
Corresponding author: [email protected]

In vitro shoot tips of Dendrobium stuposum Lindl. were cultured on semi-solid Murashige and Skoog (MS)
medium supplemented with various combinations of BA (0.5, 1.0 and 2.0 mg/l) and NAA (0.5, 1.0 and 2.0 mg/l)
for 12 weeks. The results found that the highest shoot number (4.5 shoots) could induce on the medium added
2.0 mg/l BA in combination with 2.0 mg/l NAA, while as the highest leaves number (6.2 leaves) could form on
the medium supplemented with in combination of 2.0 mg/l BA and 2.0 mg/l NAA. Nevertheless, the hormone
free medium or added with 0.5 mg/l BA in combination of 1.0 mg/l NAA showed no different significant in the
highest roots number (4.0 and 4.1 roots) and root length (1.03 and 0.80 cm), respectively.
Keywords : Dendrobium / Growth and Development / Plant Growth Regulators

การประชุมวิชาการระดับชาติ วทิ ยาศาสตร์วิจัย คร้ังที่ 12
THE 12TH NATIONAL SCIENCE RESEARCH CONFERENCE
วนั ที่ 6-7 พฤษภาคม 2564 คณะวิทยาศาสตร์ มหาวทิ ยาลยั นเรศวร