E-book แนะนำผลงานทางวิชาการ

SybilVote: Formulas to Quantify
the Success Probability of
Sybil Attack in Online Social
Network Voting

รศ. ดร.เชาวนดิศ อัศวกลุ ภาคว�ชาวศ� วกรรมไฟฟา
0-2218-6908 [email protected]

ABSTRACT

This letter proposes to derive the success probability of Sybil attack in
online social networks with the multiple-choice majority voting. The
resultant SybilVote formulas produce outputs that are consistent with
the Monte Carlo simulation and more accurate than the existing
formula based on the multinomial distribution tail estimate.
The computational complexity of SybilVote exact formulas is
O(n + Sk), where n, k, and S are the number of real users, choices, and
Sybil users, respectively. The accurate approximation formula of
SybilVote is also presented with O(k) complexity by using a normal
distribution approximation available when n and k are large in a
large-population user voting condition. Finally, the effects of
parameters on the success probability of Sybil attack have been
investigated to highlight usefulness of the formulas.

FULL PAPER (LINK)

ดูเพม่ิ เตมิ ไดทีว่ ารสาร
IEEE Communications Letters
ตพี มิ พป 2017 เดอื นกรกฎาคม ฉบบั ที่ 21 หนา 1553-1556
https://ieeexplore.ieee.org/document/7887684/

หนว ยสอ่ื สารองคก ร [email protected]

Bright light and oxygen therapies
decrease delirium risk in critically ill
surgical patients by targeting sleep
and acid-base disturbances

รศ. ดร.ธวชั ชยั เตชสั อนนั ต ภาคว�ชาวศ� วกรรมไฟฟา
0-2218-6527 [email protected]

ABSTRACT

This study examined the effects of bright light therapy (BLT) on the incidence of delirium in
post-operative patients admitted to a surgical intensive care unit (SICU) and delineates risk
and protective factors. We included 62 patients in a single-blind, randomized controlled
study. The intervention group was treated with care as usual plus BLT for three consecutive
days. Delirium was diagnosed by DSM-5 criteria with the Confusion Assessment Method-In-
tensive Care Unit (CAM-ICU). Risk factors for delirium were measured, including the APACHE
II score, Insomnia Severity Index (ISI), as well as hematocrit and bicarbonate levels. Results
were adjusted for treatment with nasal cannula oxygen and medications. Thirteen patients
developed delirium within the three days fol-lowing surgery. Generalized estimating equa-
tions analysis showed a significant preventive effect of BLT on delirium, which was indepen-
dent of risk or treatment factors. Higher APACHE-II and ISI scores, lower hema-tocrit and
lower bicarbonate levels increased the risk of developing delirium. BLT plus nasal cannula
oxygen significantly reduced the likelihood of delirium. BLT significantly lowered ISI scores,
while nasal cannula oxygen significantly enhanced bicarbonate levels. The results indicate
that BLT and supplementary oxygen therapy may protect against delirium by targeting
sleep-wake and deficits in the bicarbonate buffer system.

FULL PAPER (LINK)

ดเู พิ่มเติมไดทว่ี ารสาร
Psychiatry Research
ตพี ิมพป 2018 เดอื นมีนาคม ฉบับท่ี 261 หนา 21-27

https://doi.org/10.1016/j.psychres.2017.12.046

หนว ยสอ่ื สารองคก ร [email protected]

Screening and selection of ferric
reducing bacteria by electrical
current for microbial fuel cell

รศ. ดร.มานะ ศรย� ทุ ธศกั ดิ์ ภาคว�ชาวศ� วกรรมไฟฟา
0-2218-6517 [email protected]

ABSTRACT

The efficiency of microbial fuel cell (MFC) performance depends on the competence of
microorganisms on being an essential role in primarily converting organic compound into
electricity. In this study, the possibility of using electrical current to select electrochemical
active bacteria from sub-sediment for use in MFC was conducted. By using an alternating
current (AC) of 0.6-12 mA and selective media, 16 Gram-positive ferric reducing bacteria
(GP-FRB), 15 Gram-negative ferric reducing bacteria (GN-FRB) and 9 Gram-negative non FRB
(GN-nonFRB) were characterized. GN-FRB and GP-FRB were obtained from the current of
0.6-6 and 9-12 mA, respectively. After tested in MFC, GN-FRB had a greater current density
and power density than those from GN-nonFRB and GP-FRB. However, the greatest voltage
was obtained from GP-FRB, followed by those of GN-nonFRB and GN-FRB, respectively. The
highest current and power density of 13.33 mA/m2 and 0.32 mW/m2, respectively were from
GN-FRB namely KL14 which was identified later as Proteus sp. This research could contribute
a promising method for screening and selection of ferric reducing bacteria using electrical
current. MFC inoculated with our selected bacteria could be a model for next study in waste-
water treatment. © 2017, Chulalongkorn University 1. All rights reserved.

FULL PAPER (LINK)

ดูเพิ่มเตมิ ไดทว่ี ารสาร
Engineering Journal
ตพี มิ พป 2017 เดอื นกันยายน ฉบับท่ี 21 หนา 25-35
http://www.engj.org/index.php/ej/article/view/1433/630

หนว ยสอ่ื สารองคก ร [email protected]

A reduced complexity of Vahedi’s tag
estimation method for DFSA

รศ. ดร.ลญั ฉกร วุฒิสิทธกิ ุลกิจ ภาคว�ชาวศ� วกรรมไฟฟา
0-2218-6908 [email protected]

ABSTRACT

In order to calculate the number of tags in a radio frequency identification
(RFID) system, several tag estimation methods have been investigated in literature
and most of the available estimation methods need the overall knowledge of idle,
success and collision slots of the previous frame to carry out the tag estimation
process. In this article, we present three techniques to reduce the complexity of
Vahedi’s tag estimation for tag collision resolution in RFID systems using dynamic
frame slotted ALOHA. Our modified and useful approach considers the information
about only the number of empty, successful or colliding slots in the previous frame
for the tag estimation. Three decision rules were obtained by maximizing the likeli-
hood of success, idle and collision which helps in the reduction of complexity sub-
stantially. However, the accuracy of estimation decreases for success-only and
idle-only methods while the collision-only method gives a consistent and lower
estimate error when the frame sizes and the number of tags increase.

FULL PAPER (LINK)

ดูเพม่ิ เติมไดท วี่ ารสาร
Engineering Journal
ตพี ิมพป 2017 เดอื นตลุ าคม ฉบับที่ 21 หนา 111-125
https://engj.org/index.php/ej/article/view/2208

หนว ยสอ่ื สารองคก ร [email protected]

Automatic vehicle classification
using linked visual words

รศ. ดร.สภุ าวดี อรามวท� ย ภาคว�ชาว�ศวกรรมไฟฟา

0-2218-6909 [email protected]

ABSTRACT

An improvement in the method of automatic vehicle classification is investigated.
The challenges are to correctly classify vehicles regardless of changes in illumination,
differences in points of view of the camera, and variations in the types of vehicles.
Our proposed appearance-based feature extraction algorithm is called linked visual
words (LVWs) and is based on the existing technique bag-of-visual word (BoVW) with
the addition of spatial information to improve accuracy of classification. In addition, to
prevent over-fitting due to a large number of LVWs, four common sampling
techniques with LVWs are investigated. Our results suggest that the sampling of LVWs
using TF-IDF with grouping improved the accuracy of classification for the test
dataset. In summary, the proposed system is able to classify nine types of vehicles and
work with surveillance cameras in real-world scenarios. The classification accuracy of
the proposed system is 5.58% and 4.27% higher on average for three datasets when
compared with BoVW + SVM and Lenet-5, respectively.

FULL PAPER (LINK)

ดเู พิม่ เติมไดที่วารสาร
Journal of Electronic Imaging
ตีพิมพป  2017 เดือนกรกฎาคม ฉบับท่ี 26 หมายเลขบทความ 043009
http://spie.org/Publications/Journal/10.1117/1.JEI.26.4.043009?SSO=1

หนว ยสอ่ื สารองคก ร [email protected]

Effect of substrate temperature on
self-assisted GaAs nanowires grown by
Molecular Beam Epitaxy on GaAs
(111)B substrates without SiO layer

รศ.ดร.สมชยั รตั นธรรมพนั ธ ภาควช� าวศ� วกรรมไฟฟา
0-2218-6522 [email protected]

ABSTRACT

In this work, we demonstrate a self-assisted VLS growth of GaAs nanowires
directly on GaAs (111)B substrates without assistance of SiO layer. We
believe that with this technique, we can overcome some inherent problems
that usually occur in conventional self-assisted VLS growth and simplify the
process. Moreover, to study the effect of substrate temperature, each
nanowire sample was fabricated at the different temperature from 400 °C to
600 °C using Molecular Beam Epitaxy (MBE) technique. Surface morphology,
elemental composition, and crystal structure of nanowire samples were
characterized by Scanning Electron Microscope (SEM), Energy-dispersive
X-ray spectroscopy (EDX), and X-ray Diffraction Analysis (XRD) respectively.

FULL PAPER (LINK)

ดูเพม่ิ เตมิ ไดท ีว่ ารสาร

Journal of Crystal Growth
ตีพมิ พป 2017 เดอื นพฤศจกิ ายน ฉบับที่ 477 หนา 217-220
https://www.sciencedirect.com/science/article/pii/S0022024817301409

หนว ยสอ่ื สารองคก ร [email protected]

Growth of truncated pyramidal
InSb nanostructures on
GaAs substrate

รศ. ดร.สมชยั รัตนธรรมพันธ ภาคว�ชาวศ� วกรรมไฟฟา
0-2218-6522 [email protected]

ABSTRACT

Growth and structural characterization of InSb nanostructures formed
on GaAs is presented. Saturated InSb nanostructure have a truncated
pyramidal shape with rectangular base. In addition, some InSb
nanostructures have twin truncated pyramidal configurations. The twin
truncated pyramids align in parallel with each other and along [110]
direction. We attribute the formation of rectangular base to the growth
of highly mismatched InSb/GaAs system while the formation of twin
configuration due to the nucleation of InSb islands on top of
two-dimensional InSb plateau. The latter is suggested by an
observation on the initial state of InSb nanostructure formation.

FULL PAPER (LINK)

ดเู พมิ่ เติมไดท ีว่ ารสาร
Journal of Crystal Growth
ตีพิมพป 2017 เดอื นกรกฎาคม ฉบับที่ 468 หนา 737-739
https://www.sciencedirect.com/science/article/pii/S0022024816308028

หนว ยสอ่ื สารองคก ร [email protected]

Morphology of self-assembled
InSb/GaAs quantum dots on
Ge substrate

รศ. ดร.สมชัย รัตนธรรมพนั ธ ภาคว�ชาวศ� วกรรมไฟฟา
0-2218-6522 [email protected]

ABSTRACT

In this work, we report on the growth of self-assembled InSb/GaAs
quantum dots (QDs) on (001) Ge substrate by molecular beam epitaxy.
Due to the polar/non-polar nature of GaAs grown on Ge, antiphase
domains are formed. Effects of the domain and QD growth temperature
on the morphology of realized QDs are presented. InSb QDs are mostly
formed at the antiphase-domain boundaries (APBs). The QD size, shape
and density are varied with the QD growth temperature. These
free-standing QDs have irregular lens and stripe-shapes with {10n} side
facets according to the analysis of atomic force microscopy images.
InSb QDs is formed at the APBs, where two orthogonal GaAs surfaces
are met.

FULL PAPER (LINK)

ดเู พิม่ เตมิ ไดที่วารสาร
Journal of Crystal Growth
ตพี มิ พป 2017 เดือนมถิ นุ ายน ฉบบั ที่ 468 หนา 541-546
https://www.sciencedirect.com/science/article/pii/S0022024816306935

หนว ยสอ่ื สารองคก ร [email protected]

Observation of self-assisted
GaAs nanowire growth by
molecular beam epitaxy on
GaAs (111)B without SiO2 layer

รศ. ดร.สมชัย รตั นธรรมพนั ธ ภาคว�ชาว�ศวกรรมไฟฟา

0-2218-6522 [email protected]

ABSTRACT

GaAs nanowire growth was performed on bare GaAs (1 1 1)B substrates by
molecular beam epitaxy technique. A small adjustment was made to the
conventional self-assisted VLS growth by removing covered SiO2 layer and
growing nanowires directly on the substrate surface in order to eliminate some
issues that occur in the conventional self-assisted VLS growth. To study the
growth mechanism, growth time was varied as a growth parameter.
Nanowire crystal structure was investigated by XRD analysis. Evolution of
surface morphology along with RHEED patterns were utilized to determine
characteristics of the growth.

FULL PAPER (LINK)

ดูเพิม่ เตมิ ไดท ี่วารสาร
Materials Research Express
ตีพิมพป 2017 เดือนพฤศจกิ ายน ฉบับท่ี 4 หมายเลขบทความ 095016
https://goo.gl/THZ5go

หนว ยสอ่ื สารองคก ร [email protected]

A zero bias pixel sensor and its zero-bias
column buffer-direct-injection circuit

ผศ. ดร.วันเฉลิม โปรา ภาคว�ชาว�ศวกรรมไฟฟา
0-2218-6484 ตอ 11 [email protected]

ABSTRACT

Two pixel sensors, namely active pixel sensor (APS) and pseudo-active pixel sensor
(PAPS), are reviewed to show that APS suffers from dark current while PAPS suffers from
leakage current. Then a new pixel sensor called zero bias pixel sensor (ZBPS) in which
only two MOS switches in addition to the photodiode are used, one for connecting the
pixel’s photodiode to a column bus and the other for bypassing it. A zero-bias column
buffer-direct-injection (ZCBDI) circuit, which is similar to a regulated cascode amplifier,
is used to control the voltage at column bus at zero. All ZBPS pixels are guaranteed to
work at zero voltage at all times to eliminate the dark current as well as leakage current.
A case of a 10µm x 10µm ZBPS pixel designed with standard 0.1µm CMOS process is
studied through simulation. This pixel generates a photocurrent within a range from
1pA to 100nA. To handle a large variation of photocurrent while maintaining zero
column voltage, the ZCBDI is designed using differential cascode, common source, and
buffer stages and then compensated for 50 degree phase margin. Transient simulation
shows that the pixel steady state response time is around 1.406ms, leading to at most
5.5 frames per second for an image of 128x128 ZBPS pixels. The fill factor of ZBPS for this
case is around 59%. © 2017, Chulalongkorn University 1. All rights reserved.

FULL PAPER (LINK)

ดูเพ่มิ เติมไดท ีว่ ารสาร
Engineering Journal
ตีพมิ พป  2017 เดือนกันยายน ฉบบั ท่ี 21 หนา 179-191
http://www.engj.org/index.php/ej/article/view/1505/645

หนว ยสอ่ื สารองคก ร [email protected]

In-vehicle carbon dioxide
concentration in commuting cars
in Bangkok, Thailand

ผศ. ดร.สุร�ย พม่� ร�นทร ภาคว�ชาว�ศวกรรมไฟฟา
0-2218-6484 ตอ 13 [email protected]

ABSTRACT

It is known that in-vehicle carbon dioxide (CO2) concentration tends to increase
due to occupant exhalation when the HVAC (heating, ventilation, and

air conditioning) air is in recirculation mode. Field experiments were conducted to

measure CO2 concentration during typical commute in Bangkok, Thailand.
The measured concentrations agreed with the concentration predicted using

first-order mass balance equation, in both recirculating and outside air modes.

The long-term transient decay of the concentration when the vehicle was parked and

the HVAC system was turned off was also studied. This decay was found to follow

Fickian diffusion process. The paper also provides useful operational details of the

automotive HVAC system and fresh air ventilation exchange between cabin interior

and exterior. Implications: Drivers in tropical Asian countries typically use HVAC

recirculation mode in their automobiles. This behavior leads to excessive buildup of

cabin CO2 concentration levels. The paper describes the CO2 buildup in a typical
commute in Bangkok, Thailand. Auto manufacturers can potentially take measures to

alleviate such high concentration levels. The paper also discusses the diffusion of CO2
through the vehicle envelope, an area that has never been investigated before.

FULL PAPER (LINK)

ดูเพิม่ เติมไดท ่ีวารสาร
Journal of the Air and Waste Management Association
ตีพิมพป 2017 เดอื นเมษายน ฉบับท่ี 67 หนา 623-633
https://www.tandfonline.com/doi/full/10.1080/10962247.2016.1268983

หนว ยสอ่ื สารองคก ร [email protected]



Dynamic modelling of carboxylic
acid filtration in forward osmosis
process: The role of membrane
CO2 permeability

รศ. ดร.ชวลติ รตั นธรรมสกุล ภาควช� าว�ศวกรรมสิ�งแวดลอ ม
0-2218-6678 Email: [email protected]

ABSTRACT

This research intends to develop the mathematical model of forward
osmosis process during the filtration of a single carboxylic acid and a mixture
of two carboxylic acids by investigating and compiling each single logical
phenomenon to formulate simultaneous equation models of the associated
process variables in the operation of forward osmosis system (Dynamic
Modelling). The developed model demonstrates that the permeating CO2
from NaCl draw solution performs the major role in sequentially generating
the true carbonic acid (Pka = 3.45), causing the substantial impact on the pH
reduction in acid feed solution. Based on inverse problems techniques, the
dynamic model, which takes into account the presence of true carbonic acid
formation, was fitted to experimental pH profiles. The unobserved mem-
brane CO2 permeability (0.0025 L/m2/h) could directly be obtained. Referred
to Levenberg-Marquardt algorithm, all time-dependent process variables
could be defined by the dynamic simulation model at any point in simulating
time.

FULL PAPER (LINK)

ดเู พม่ิ เตมิ ไดท ว่ี ารสาร
Computers & Chemical Engineering
ตีพมิ พป 2017 เดอื นมนี าคม ฉบบั ที่ 98 หนา 100-112
https://www.sciencedirect.com/science/article/pii/S0098135416303337

หนว ยสอ่ื สารองคก ร [email protected]

Dependence of toxicity of silver
nanoparticles on pseudomonas
putida biofilm structure

รศ. ดร.ตะวนั ลมิ ปย ากร ภาควช� าวศ� วกรรมสง�ิ แวดลอ ม
0-2218-6667 Email: [email protected]

ABSTRACT

Susceptibility of biofilms with different physical structures to silver nanoparticles (AgNPs)
was studied. Biofilms of Pseudomonas putida KT2440 were formed in batch conditions under
different carbon sources (glucose, glutamic acid, and citrate), glucose concentrations (5 and 50
mM), and incubation temperatures (25 and 30 °C). The biofilms were observed using confocal
laser scanning microscopy for their p hysical characteristics (biomass amount, thickness,
biomass volume, surface to volume ratio, and roughness coefficient). The biofilms forming
under different growth conditions exhibited different physical structures. The biofilm
thickness and the roughness coefficient were found negatively and positively correlated with
the biofilm susceptibility to AgNPs, respectively. The effect of AgNPs on biofilms was low
(1-log reduction of cell number) when the biofilms had high biomass amount, high thickness,
high biomass volume, low surface to volume ratio , and low roughness coefficient.
Furthermore, the extracellular polymeric substance (EPS) stripping process was applied to
confirm the dependence of susceptibility to AgNPs on the structure of biofilm. After the EPS
stripping process, the biofilms forming under different conditions showed reduction in
thickness and biomass volume, and increases in surface to volume ratio and roughness
coefficient, which led to more biofilm susceptibility to AgNPs. The results of this study suggest
that controlling the growth conditions to alter the biofilm physical structure is a possible
approach to reduce the impact of AgNPs on biofilms in engineered and natural systems.

FULL PAPER (LINK)

ดูเพ่มิ เตมิ ไดที่วารสาร
Chemosphere
ตพี ิมพป  2017 เดอื นธนั วาคม ฉบับท่ี 188 หนา 199-207
https://www.sciencedirect.com/science/article/pii/S0045653517313863

หนว ยสอ่ื สารองคก ร [email protected]

Microbial community analysis
using MiSeq sequencing in a
novel configuration fluidized
bed reactor for effective
denitrification

ผศ. ดร.ชัยพร ภูประเสรฐ� ภาคว�ชาว�ศวกรรมสง�ิ แวดลอ ม
0-2218-6671 [email protected]

ABSTRACT

A novel configured fluidized bed reactor (FBR) with granular rubber as the fluidized media
was operated without internal recirculation to achieve denitrification. This FBR could operate
under a low hydraulic retention time (HRT) of 50 min due to the low rubber media density and
absence of recirculation. Synthetic nitrate-rich wastewater with a fixed nitrate (NO3−-N) concen-
tration and varying COD concentrations was fed into the FBR. The nitrate removal profile showed
a rapid nitrate reduction at the bottom of the reactor with a high performance under the low
HRT. Different microbial communities were identified using Illumina Miseq sequencing. The
dominant microorganisms belonged to the Beta- and Gamma-proteobacteria classes and played
important roles in nitrate reduction. Acidovorax was abundant at low COD: NO3−-N ratios, while
Rhizobium and Zoogloea were dominant at high COD: NO3−-N ratios. The COD: NO3−-N ratio
strongly influenced the composition of the microbial community including the dominant
species.

FULL PAPER (LINK)

ดูเพ่ิมเติมไดท ่ีวารสาร
Bioresource Technology
ตพี ิมพป  2016 ฉบบั ท่ี 221 หนา 677-681

https://www.sciencedirect.com/science/article/pii/S0960852416313086

หนว ยสอ่ื สารองคก ร [email protected]

Properties of residual titanium dioide
nanoparticles after extended periods of
mixing and settling in synthetic and natural
waters

อ. ดร.เจนยกุ ต โลห ว ชั ร�นทร ภาควช� าวศ� วกรรมสงิ� แวดลอม
0-2218-6875
Email: [email protected]

ABSTRACT

Titanium dioxide nanoparticle (TiO2NP) discharged into water bodies can affect
ecosystems and human health adversely. We studied the properties of residual
TiO2NPs with and without gentle mixing (to simuate a natural environment more
closely) and after settling for 12-h periods. Surface complexation, dynamic
parcle size changes, and TiO2NP destabilization in synthetic and lake waters were
investigated. The accumulation of inert ions (Na+ and Cl ) in the diffuse layer
which was not discussed in other studies was supposed to be the main reason
that aggregation occurred slowly and continuously. PO43 stabilized and dstablized
TiO2NPs at 10 mM and100mM, respectively. Destabiliztion occurred because high
ionic strength overwhelmed increased negative charges of TiO2 NPs by
coplexation with PO43 . TiO2NP destabilization was achieved in approximately 12 h
in synthetic and lake waters, and is attributed to the slow diffusion of ions into
aggregates. Despite the presence of moderately high concentrations of natural
organic matter, which tends to stabilize TiO2 NPs, the addition of 20mM PO43
destabilized the TiO NPs in lake water. Smaller aggregate sizes formed compared
with those before destabilization, which indicates that stable residual TiO2 NPs
could exist in aquatic environments after extended periods.

FULL PAPER (LINK)

ดเู พิม่ เตมิ ไดที่วารสาร
Scientific Reports
ตพี ิมพป  2017 เดือนธนั วาคม ฉบับที่ 7 หนา 9943
https://www.nature.com/articles/s41598-017-09699-9

หนว ยสอ่ื สารองคก ร [email protected]



Expert-based text mining with Delphi
method for crude oil price prediction

ศ. ดร.ปารเมศ ชุตมิ า ภาควช� าวศ� วกรรมอตุ สาหการ

0-2218-6847 [email protected]

ABSTRACT

As crude is one of the most important commodities, the crude price forecasting has
continuously been a centre of interest. The traditional techniques are focusing on
econometric models which could not cope with the short term abnormality. Text data
mining from news articles could be an effective method to predict the crude oil price
variation caused by irregularities, but, the main issues in text mining originate from the
particularities of natural language. In this research, the expert-based Delphi text mining
(EDTM) is proposed to predict the movement of crude prices when the irregularity
occurs. We employ the hierarchical clustering algorithm to reveal implicit knowledge
hidden in news streams. Next, the Delphi method is introduced to give weighted
ratings for different corresponding events extracted from the news. Finally,
a comprehensive experiment is illustrated to show the effectiveness.

FULL PAPER (LINK)

ดูเพ่มิ เติมไดท ่ีวารสาร
International Journal of Industrial and Systems Engineering
ตพี มิ พป  2017 ฉบับที่ 25 หนา 545-563
http://www.inderscience.com/info/inarticle.php?artid=83045

หนว ยสอ่ื สารองคก ร [email protected]

Multi-objective mixed-model parallel
assembly line balancing with a fuzzy
adaptive biogeography-based algorithm

ศ. ดร.ปารเมศ ชตุ มิ า ภาคว�ชาวศ� วกรรมอตุ สาหการ
0-2218-6847 [email protected]

ABSTRACT

Parallel assembly lines (PALs) typify a production facility comprising of two or more
straight assembly lines arranged in parallel to assemble similar products or different
models of the same product. The configuration of PALs poses new challenges for the
optimal design of the lines since the efficacy of the assembly system can be improved
by combining stations of adjacent lines when balancing them. As a consequence,
the multi-objective mixed-model parallel assembly line balancing problem is
addressed in this paper. The hierarchical objectives to be optimised include:
1) minimising number of workstations; 2) minimising number of stations;
3) simultaneously minimising workload variation and maximising work-relatedness.
The fuzzy BBO (F-BBO) algorithm is developed to tackle this problem and its
performances are evaluated against several well-known algorithms under different
instances of benchmark problems. The experimental results show that the solution
quality of the proposed F-BBO is significantly better than the contestant algorithms.

FULL PAPER (LINK)

ดเู พ่ิมเติมไดท ่วี ารสาร
International Journal of Industrial and Systems Engineering
ตพี มิ พป 2017 ฉบับที่ 26 หนา 90-132
https://www.inderscienceonline.com/doi/abs/10.1504/IJISE.2017.083182

หนว ยสอ่ื สารองคก ร [email protected]

A decision support model for staff
allocation of mobile medical service

รศ. ดร.ปว�ณา เชาวลิตวงศ์ ภาควช� าว�ศวกรรมอุตสาหการ
0-2218-6829 [email protected]

ABSTRACT

Princess Mother’s Medical Volunteer (PMMV) Foundation is the most recognized and significant
free-of-charge mobile medical service (MMS) provider in Thailand. They require volunteers from partner
hospitals to give medical care to poor populations residing in remote areas of the country where access to
general medical services is limited. Volunteers usually include four types of staff: doctors, dentists, nurses,
and pharmacists. According to their operational plan, the PMMV and their working partners need to prop-
erly allocate/assign volunteer medical staff to operation sites according to site requirements. In current
planning process, the PMMV has to organize massive amounts of data from different organizations in the
country, resulting in a long processing time for allocation decisions. In addition, the current process does
not allow decision makers to efficiently allocate medical staff with acceptable transportation cost. There is
a significant opportunity to improve this process by using analytical models to support this decision
making. Thus, this paper proposes a decision support model for staff allocation. The proposed model is in a
form of computer information system (CIS) that is carefully developed to facilitate the access to heteroge-
neous data and ease of use by decision makers. The proposed CIS will assist the PMMV central offices and
partners to manage massive data more efficiently and effectively, while the decision algorithm can facilitate
planners to achieve the lowest possible cost associated with their decisions. The outcomes of this research
were verified by potential users through a focus group manner. The result showed that the potential users
were very satisfied with the overall performance of this system.

FULL PAPER (LINK)

ดเู พิ่มเตมิ ไดทีว่ ารสาร
Annals of Operations Research
ตีพมิ พป 2017 เดอื นกุมภาพนั ธ ฉบบั ที่ 249 หนา 433-448
https://link.springer.com/article/10.1007%2Fs10479-015-1991-5

หนว ยสอ่ื สารองคก ร [email protected]

A method of prioritizing quality improvement
in aviation refuelling services at airport

รศ. ดร.ณัฐชา ทว�แสงสกุลไทย ภาควช� าว�ศวกรรมอุตสาหการ
02-218-6822 [email protected]

ABSTRACT

There has been growing emphasis on quality measures and process analysis
techniques that may be implemented in the daily practice of aviation refuelling to
improve the overall quality of safety care. The quality assessment and process
controls are most effective when used to determine the level of execution profi-
ciency against the standard of aviation fuel quality control and handling. In this
article, we have developed the quality assessment tools, control charts and new
key indicator to prioritize the quality improvement that should be actionable and
specific to guide process improvement efforts successively. Changing from a reg-
ular visual check to an automatic visual inspection tool, as well as from a pass/fail
criteria to a satisfaction scale from 1 to 10 in the control, produces systematic
data. Control charts are an effective way to separate a change in the process, so
the user can focus on issues that are more likely to improve quality and safety. Our
proposed quality assessment tools, process control and quality improvement
prioritization were used to provide continuous feedback on the aviation refuel-
ling service's capability to exceed the standards.

FULL PAPER (LINK)

ดูเพิ่มเตมิ ไดท ่วี ารสาร
Advances in Mechanical Engineering
ตพี ิมพป  2017 เดอื นมิถุนายน ฉบับที่ 9
https://journals.sagepub.com/doi/10.1177/1687814017706436

หนว ยสอ่ื สารองคก ร [email protected]

Development of quality management system
under ISO 9001:2015 and Joint Inspection
Group (JIG) for aviation fuelling service

รศ. ดร.ณัฐชา ทว�แสงสกุลไทย ภาควช� าวศ� วกรรมอุตสาหการ
0-2218-6822 [email protected]

ABSTRACT

The Joint Inspection Group (JIG) standard for aviation fuel quality management assists in the operational
process and maintenance of aviation fuel from its point of origin and through distribution systems to airports.
Currently, problems arise as the JIG standard and quality management in aviation fuel are isolated and have
independent procedures. Merging the JIG standards with ISO 9001:2015 can override original JIG’s philosophy by
connecting all quality assessment, and management parties involved, throughout the supply chain. This integra-
tion can harmonize auditing tasks, focusing on risk/opportunity, and continue quality improvement focus. This
paper proposes a development of quality management system (QMS) under ISO 9001:2015 for aviation fuelling
service in a systematic way. The content and critical success factors of ISO 9001:2015 and JIG standards were
studied. The beneficial synergies, similarities, and logical linkages between both standards are identified. This
QMS was developed in the largest petroleum company in Thailand and 60 selected experts were surveyed, with
a response rate of 88.3%, for their agreement on integrated criteria. Two external quality auditors, who have ISO
9001 and JIG expertise, were interviewed to modify our initial proposed QMS. The final QMS was implemented in
the into-plane fuelling services as the first phase of this implementation. Results of framework implementation
are discussed in a case study. There are mutual benefits resulting from the integration of JIG and ISO 9001:2015
standards. This QMS provides a unified process for quality management practices, and enhances the effectiveness
of risk evaluation as well as the opportunity for continued quality improvement. It facilitates the identification of
ISO 9001:2015 requirements and establishes relationships between the roles of JIG standard and the clauses of
ISO 9001:2015. The first experience from five airports as the pilot study of proposed QMS implementation
minimized conflicts and duplications between JIG and ISO 9001:2015 standards, reduced the number of
into-plane fuelling service incidents reported, such as oil spill, machine stoppage, re-inspections, and recall costs.

FULL PAPER (LINK)

ดเู พม่ิ เติมไดท วี่ ารสาร
Management and Production Engineering Review
ตพี มิ พป 2017 เดอื นกนั ยายน ฉบับที่ 8 หนา 50-59
https://content.sciendo.com/view/journals/mper/8/3/article-p50.xml

หนว ยสอ่ื สารองคก ร [email protected]

Hospital service quality measurement models:
patients from Asia, Europe, Australia and America

รศ. ดร.ณัฐชา ทว�แสงสกุลไทย ภาคว�ชาวศ� วกรรมอตุ สาหการ
02-218-6822 [email protected]

ABSTRACT

This study explores how service quality in hospitals is perceived and measured
among different groups of patients from four major continents (i.e. Asia, Europe, Aus-
tralia and North America) who came to receive medical services in Thailand. Using strati-
fied random sampling, data were collected from 2189 patients from 80 countries and
four continents at six hospitals which provide healthcare services to international
patients in Thailand. Four different models of measuring service quality based on differ-
ent continents were developed with different numbers of quality dimensions and also a
variation in the number of quality attributes. Asian patients provided a four-dimension
model with 20 items; while a two-dimension model with 16 items was identified for
European patients. Australian patients also revealed a two-dimension model but with
22 items, while patients from America provided a three-dimension model, also with 17
items. The study reveals that the development of service quality measurement models
should not only consider context-specific items such as size and location, but should
also include the nationality and demographic of the patient population. The findings
also support that service quality has a significant impact on service satisfaction and the
retention level of customers at the hospital. The concluded frameworks may guide
healthcare providers to deliver better quality healthcare services and to sustain compet-
itiveness.

FULL PAPER (LINK)

ดเู พ่ิมเติมไดท ี่วารสาร
Journal Total Quality Management & Business Excellence
ตีพมิ พป 2015 เดือนกรกฎาคม ฉบับที่ 26 หนา 9-10

https://www.tandfonline.com doi/abs/10.1080/14783363.2015.1068596

หนว ยสอ่ื สารองคก ร [email protected]

Overhaul resource planning
for rolling stock using MIP models

รศ. ดร.วภ� าว� ธรรมาภรณพ�ลาศ ภาควช� าวศ� วกรรมอุตสาหการ
0-2218-6829

ABSTRACT

In term of maintenance, parts must be maintained to satisfy operating
conditions. Although, maintenance is costly and unprofitable, it is indis-
pensable. Thus, reducing maintenance costs without reducing mainte-
nance is one of the critical issues. Since maintenance costs mainly come
from resources, they should be properly managed to minimize the cost.
Hence, the goal of this paper is to find the optimal number of resources
for required maintenance activities. Two mixed-integer programming
models are developed. The first model is used for a long-term plan to
find a proper number of resources while the second one generates a
maintenance schedule for a shorter time frame to verify feasibility of the
plan.

FULL PAPER (LINK)

ดูเพิม่ เตมิ ไดท ว่ี ารสาร
Engineering Journal
ตีพิมพป  2017 เดอื นกนั ยายน ฉบบั ที่ 21 หนา 145-159
http://www.engj.org/index.php/ej/article/view/1417/644

หนว ยสอ่ื สารองคก ร [email protected]

A wavelet approach to predict surface
roughness in ball-end milling

รศ. ดร.สมเกยี รติ ต้งั จิตสติ เจรญ� ภาคว�ชาว�ศวกรรมอุตสาหการ

0-2218-6814 Email: [email protected]

ABSTRACT

This research proposed an advance in the prediction of the in-process surface
roughness during the ball-end milling process by utilizing the wavelet transform
to monitor and decompose the dynamic cutting forces. The chatter detection
system has been adopted from the previous research of the author to avoid the
chatter first,and hence, the dynamic cutting force ratio is introduced to predict
the in-process surface roughness during the normal cutting by taking the ratio of
the decomposed dynamic cutting force in X axis to that in Z axis. The Daubechies
wavelet transform is employed in this research to analyze the in-process surface
roughness. The experimentally obtained results showed that the surface rough-
ness frequency occurred at the same level of the decomposed dynamic cutting
forces although the cutting conditions are changed. It is understood that the
in-process surface roughness can be predicted effectively under various cutting
conditions referring to the proposed monitoring system.

FULL PAPER (LINK)

ดูเพ่มิ เตมิ ไดท่วี ารสาร
Proceedings of the Institution of Mechanical Engineers,
Part B: Journal of Engineering Manufacture
ตพี มิ พป  2017 เดอื นธนั วาคม ฉบบั ท่ี 231 หนา 2468-2478
http://journals.sagepub.com/doi/pdf/10.1177/0954405415601804

หนว ยสอ่ื สารองคก ร [email protected]

Monitoring of chip breaking and surface
roughness in computer numerical
control turning by utilizing wavelet
transform of dynamic cutting forces

รศ. ดร.สมเกยี รติ ต้ังจิตสติ เจรญ� ภาควช� าวศ� วกรรมอุตสาหการ
0-2218-6814 - 16 [email protected]

ABSTRACT

The aim of this research is to monitor and classify the broken chip signals from
the dynamic cutting forces, in order to predict the surface roughness during the
computer numerical control turning process utilizing the Meyer wavelet transform
to decompose the dynamic cutting forces. The dynamic cutting forces of the
broken chips and the surface roughness can be decomposed into the different
levels. The levels of decomposed cutting forces can aid to explain the broken chip
formation and the surface roughness profile in both time and frequency domains.
The experimentally obtained results showed that the surface roughness frequency
occurs at the higher level of decomposed cutting forces, especially at the fifth level,
although the cutting conditions are changed. However, the chip breaking
frequency appears at the lower level, which depends on the cutting conditions
and the chip length. The ratio of the fifth level of decomposed feed forces to that of
main forces is proposed to predict the surface roughness during the in-process
cutting. It is understood that the broken chip formation can be separated clearly
and the surface roughness can be predicted well during the cutting, regardless of
the cutting conditions.

FULL PAPER (LINK)

ดเู พมิ่ เตมิ ไดทีว่ ารสาร

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture

ตพี ิมพป 2017 เดือนธนั วาคม ฉบบั ท่ี 231 หนา 2479-2494
http://journals.sagepub.com/doi/pdf/10.1177/0954405415601804

หนว ยสอ่ื สารองคก ร [email protected]

Warehouse layout design for an automotive
raw material supplier

ผศ. ดร.นระเกณฑ พ่ม� ชศู ร� ภาควช� าว�ศวกรรมอตุ สาหการ
02-218-6822 [email protected]

ABSTRACT

The case-study company faces the limited space situation. Thus, the company decides to
uninstall their temporary warehouses and re-locate products in two permanent warehouses.
The objective of this research is to design the layouts of the two permanent warehouses so
that the spaces can be efficiently used and the total picking distance is low. The past data,
Invoices and Stock Data, are used for developing layouts designing processes. This research
involves the collecting of Product Size Data to calculate the required space for the products.
There are two phases in layout designing process. The first phase is the product categories
grouping. This phase categorizes product categories into two groups for the two warehous-
es. The second phase is the layouts designing. In this phase, the layouts of the two warehous-
es and the locations of the products are designed. According to the company requirements
and policies, the Adapted Class-Based Turnover Assignment is adopted in order to design the
layouts for the two warehouses. Layouts of the warehouses are designed, analyzed, and eval-
uated. The best layouts give the best trade-off between quantitative results, i.e., the total
picking distance and the remaining space, and qualitative results, i.e., the usability and the
product suitability. The designed layouts are applied in the case-study company. This
research develops a systematic and practical layout designing method which is flexible and
can be adopted in other warehouses.

FULL PAPER (LINK)

ดูเพมิ่ เติมไดท ี่วารสาร
Engineering Journal
ตีพิมพป 2017 เดือนธนั วาคม ฉบับที่ 21 หนา 361-387
http://www.engj.org/index.php/ej/article/view/1578/702

หนว ยสอ่ื สารองคก ร [email protected]

Improving of an automated storage
and retrieval system in a construction
material retailer

ผศ. ดร.โอฬาร กติ ติธรี พรชยั ภาคว�ชาวศ� วกรรมอุตสาหการ
0-2218-6832 [email protected]

ABSTRACT

The growth in real estate sector and the raise of minimum wage in Thailand have
transformed construction material business and posted labor challenge. To address the
challenge, many retailers have adopted automated material handling equipment,
called miniload Automated Storage and Retrieval System (AS/RS) a set of industrial
automated cranes operating within high-density storage racks and narrow aisles for
totes. Equipped with guided conveyors for transfer totes an AS/RS eliminates traveling
of pickers by automatically transporting selected products inside totes to workstations.
As a result, the efficiency of system depends on operating policy as well as the business
nature of a retailer. In this study such policy of a construction material retailer that has
recently implemented a miniload AS/RS was analyzed. The primary analysis showed
that the inefficient utilization of totes causing by storage and retrieval policies. As a
result, a simulation is selected to experiment with the effects of various configuration
settings such as order batching, storage assignment and retrieval sequencing. By com-
paring average travel time and throughput the results of experiment suggest the most
suitable settings of the system.

FULL PAPER (LINK)

ดูเพิม่ เติมไดทวี่ ารสาร
Journal of Engineering and Applied Sciences
ตีพิมพป 2017 เดอื น ฉบับท่ี 12 หนา 4338-4343

หนว ยสอ่ื สารองคก ร [email protected]

Robust optimization for coal
transportation planning

ผศ. ดร.โอฬาร กิตตธิ รี พรชัย ภาควช� าวศ� วกรรมอตุ สาหการ
0-2218-6832 [email protected]

ABSTRACT

To response for the increases of electricity demands in thailand, ministry of
energy through power development plan 2015 mandates the commissioning of
additional coal-fired power plants. According to the plan, the full-scale operation in
2035 requires additional 20 million tons per annum. This unprecedented quantity
of sub-bituminous and bituminous coals reflects a strategic challenge as coals
must be imported and transported to the plants at competitive logistics costs
while minimizing disruption of public transportation and environmental impacts.
In addition to this logistics challenge, the plan also faces with local community
scrutiny and politics pressures that may delay or even cancel some coal-fired
plants. To elaborate these uncertainties, a mixed-integer linear programming is
formulated to analyze and assess their impacts by determining suitable modes of
transportation and locations of transit facility. The model also highlights impor-
tance of key parameters, specifically coal demands at power plants and construc-
tion period of transit facilities.

FULL PAPER (LINK)

ดเู พิม่ เตมิ ไดทวี่ ารสาร
Journal of Engineering and Applied Sciences
ตีพิมพป  2017 เดือน ฉบบั ท่ี 12 หนา 5609-5616

หนว ยสอ่ื สารองคก ร [email protected]

Developing Fragility Functions
Based on Aquaculture Raft and
Eelgrass due to Tsunami Damage:
A Case Study of Mangokuura Lake

อ. ดร.ณัฏฐ ลลี ะวัฒน ภาคว�ชาว�ศวกรรมอตุ สาหการ
0-2218-6841 [email protected]

ABSTRACT

The 2011 Great East Japan tsunami caused large scale devastated damage in both offshore and inland areas.
There are many previous researches that were focusing on the relationship between tsunami characteristics and
damage or loss such as human loss, building damage and fishing boat damage. Similarly, great damage and loss of
aquaculture and marine ecosystem was also caused by the 2011 tsunami. However, relationship between the tsuna-
mi and their damage has not been studied. To understand such relationship, this study has mainly three compo-
nents namely 1) Reproduction of the 2011 tsunami, 2) Damage investigation and 3) Developing fragility functions.
The source models of the 2011 tsunami were verified and adjusted so that the tsunami characteristics were able to
accurately reproduce in the target area. Damage ratios of the aquaculture raft and eelgrass were investigated using
satellite images taken before and after the 2011 tsunami through visual inspection and binarization. The tsunami
fragility functions were then developed based on the relationship between the simulated maximum flow velocity
and the calculated damage ratio. It was found that the damage ratio of higher than 0.5 is equal to the maximum
flow velocity of 0.8 m/s (aquaculture raft) and 1.0 m/s (eelgrass). Whereas, the damage ratio of higher than 0.9 is
equal to the maximum flow velocity of 1.3 m/s (aquaculture raft) and 3.0 m/s (eelgrass). It was found in this study
that the tsunami amplitude had no relationship with the damage ratio. In addition, the proposed fragility functions
for the aquaculture raft are getting along well with the previously proposed damage criteria. The proposed fragility
curves will be useful for marine product and environmental damage assessment but also suggestion for the zoning
of aquaculture raft to mitigate impact from tsunamis in the future.

FULL PAPER (LINK)

ดเู พ่มิ เตมิ ไดท วี่ ารสาร
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
ตพี ิมพป  2017 ฉบบั 73 หนา I_409-I_414
https://www.jstage.jst.go.jp/article/kaigan/73/2/73_I_409/_article/-char/en

หนว ยสอ่ื สารองคก ร [email protected]

The Evacuation of Thai Citizens During
Japan’s 2016 Kumamoto Earthquakes:
An ICT Perspective

อ. ดร.ณัฏฐ ลลี ะวัฒน ภาคว�ชาวศ� วกรรมอตุ สาหการ
0-2218-6841 [email protected]

ABSTRACT

In April 2016, the Kumamoto earthquakes in Japan killed 50 people and injured more than
3,000. Because Japan is a primary tourist destination for Thai citizens, due in part to the current visa
relaxation policy, many Thai people were visiting Japan when these earthquakes occurred. However,
while a variety of public information related to the imminent danger and disaster response was
broadcast and published, foreigners sometimes had little access to or understanding of local notices
or instructions because of language barriers.

This study researches the evacuation process for Thai citizens – including tourists, students,
and residents from Thailand – in the disaster-affected areas during the 2016 Kumamoto earth-
quakes. Through prompt collaboration among the relevant organizations, particularly the Royal Thai
Embassy in Tokyo, the evacuation of Thai citizens was successfully completed within a few days.
Moreover, some other foreigners were also assisted by the Thai embassy. This paper presents an
overview of the evacuation process, including the critical role of information and communication
technology (ICT) in disseminating information, transmitting rescue requests, and providing emer-
gency communications. The lessons learned from these efforts can be applied in future natural
disasters, especially for foreign organizations working in similar capacities overseas. In addition, this
study suggests disaster preparedness and response guidelines for tourists when traveling overseas.

FULL PAPER (LINK)

ดูเพิ่มเตมิ ไดทวี่ ารสาร
Journal of Disaster Research
ตพี ิมพป 2017 เดือนมิถุนายน ฉบับท่ี 12 หนา 669-677
https://www.fujipress.jp/jdr/dr/dsstr001200070669/

หนว ยสอ่ื สารองคก ร [email protected]

Preference for information
during flood disasters:
A study of Thailand and Indonesia

อ. ดร.ณฏั ฐ ลลี ะวัฒน ภาคว�ชาว�ศวกรรมอุตสาหการ
0-2218-6841 [email protected]

ABSTRACT

The world is encountering climate change and severe natural disasters. Floods have been one of
the most disruptive disasters these decades. The 2011 flood in Thailand affected 13.6 million people
and caused damage of USD 46.5 billion, while the 2013 flood in Jakarta, despite its short period,
affected more than 45,000 people. This study intends to examine the changes of disaster
information preference before and during each disaster. Questionnaire surveys were conducted in
July 2013 in Thailand and Indonesia. The results found that the preferences for information
increased once the disaster approached, except for preparedness plans and warnings in both cases
and waste disposal in the Indonesian case. While most of the information preferences show no
significant difference in mean between the two disasters, the results found significant differences in
preferences for traffic/transportation infrastructure both before and during the arrival of disasters,
availability of food and water, waste disposal before disaster impact, and overall damage
information during the impact. The findings are crucial in terms of information gathering and
dissemination to maintain the lives and livelihoods of human being during disasters. This study can
contribute to both research and practice in terms of disaster information analysis and better
preliminary examination of the preference for information needs from similar disasters with
different scales and geographies.

FULL PAPER (LINK)

ดเู พ่มิ เตมิ ไดทว่ี ารสาร
Sustainable Future for Human Security: Society, Cities and Governance
ตพี ิมพป 2018 เดอื นตุลาคม หนา 335-349
https://link.springer.com/chapter/10.1007%2F978-981-10-5433-4_23

หนว ยสอ่ื สารองคก ร [email protected]



A novel design and implementation
of a 4-DOF upper limb exoskeleton
for stroke rehabilitation with active
assistive control strategy

ศ. ดร.วบ� ูลย แสงวร� ะพนั ธศุ ริ � ภาควช� าว�ศวกรรมเครอ่� งกล
0-2218-6437 [email protected]

ABSTRACT

We developed a robot, CUREs (Chulalongkorn University Rehabilitation Robotic Exoskeleton
system), for upper extremity rehabilitation. The active assistive control strategy based on the imped-
ance force control is developed and implemented to obtain assistive-resistive paths tracking for reha-
bilitation activities. The desired trajectory or rehabilitated training pattern for each specific patient
need to be assigned first by a medical doctor and a physical therapy. The therapist can program the
desired trajectory by guiding the patient arm based on the assigned path pattern and the set of via
points will be stored and used for generating the desired trajectory. The desired trajectory will be
stored specific for the patient and can be called back anytime. During the rehabilitation, the robot
can assist and resist the patient’s arm to follow the desired trajectory. If the patient has difficulty
moving his arm to track the desired path, the robot will help by adding more torque to help the
patient to move his arm to reduce the error between the desired path and the actual posture. And if
the patient himself can move his arm tracking the desired path, the robot will not apply any more
force to assist or resist. The necessary state variables such as angular position and torque can be
recorded during the training. The main purpose of the experiment, follow the medical ethic, is to
assure that there is no side effect for using this rehabilitation robot. Five subacute stroke patients
participated in this pilot study. All patients have severe upper extremity weakness. The medical
doctor will assign the training pattern based on patient condition. The result showed that the
Fugl-Meyer Assessment Upper Extremity Scale was improved after 10 days of training in all partici-
pants without any sign of side effect. © 2017, Chulalongkorn University. All rights reserved.

FULL PAPER (LINK)

ดเู พมิ่ เติมไดที่วารสาร
Engineering Journal
ตพี ิมพป 2017 เดอื นธนั วาคม ฉบบั ที่ 21 หน 275-291
http://www.engj.org/index.php/ej/article/view/1760/680

หนว ยสอ่ื สารองคก ร [email protected]

Upper extremity training
with CUREs robot
in subacute stroke: A pilot study

ศ. ดร.วบ� ลู ย แสงว�ระพนั ธุศริ � ภาคว�ชาว�ศวกรรมเคร�อ่ งกล
0-2218-6437 [email protected]

ABSTRACT

We developed a robot, CUREs (Chulalongkorn University Rehabilitation
robotic Exoskeleton system), for upper extremity rehabilitation. Five subacute
stroke patients participated in this pilot study. All patients had severe upper
extremity weakness (Brunnstrom stage I and II, Fugl–Meyer Assessment
Upper Extremity score, motor function, are from 4 to 10). They participated in
30 min of conventional upper extremity training and 30 min of robotic train-
ing, 5 days per week for 2 consecutive weeks. The Fugl–Meyer Assessment
Upper Extremity Scale was improved after 2 weeks training in all participants.
However, the Motor Assessment Scale was not changed. In the future, we
plan to conduct a 4 week randomized–controlled trial study to compare the
rehabilitation outcome between CUREs robot with conventional therapy in
stroke patient.

FULL PAPER (LINK)

ดเู พิ่มเตมิ ไดท ีว่ ารสาร
Biosystems and Biorobotics
ตีพมิ พป 2017 ฉบับที่ 15 หนา 317-322
https://link.springer.com/chapter/10.1007%2F978-3-319-46669-9_54

หนว ยสอ่ื สารองคก ร [email protected]

Parallel-axis gear design methodology
for minimization of power loss and its effect
on vibration characteristics

รศ. ดร.ชนัตต รตั นสุมาวงศ ภาควช� าว�ศวกรรมเคร่�องกล
0-2218-6593 [email protected]

ABSTRACT

Gear tooth strength is mainly considered in gear design to ensure the ability to trans-
mit power. With the design process, various sets of gear parameters are probably selected
to meet the tooth strength. However the efficiencies of various designed gears are differ-
ent. Improper gear parameter selection probably makes the gear power loss increase
significantly. In this paper, the design methodology to minimize gear power loss is
presented. A spur gear selected from a catalogue is used as the reference gear. Then
several gears with various parameters but having the ability to transmit the same load are
designed. The power losses of the designed and the reference gears are estimated by the
sliding loss model, hence the minimum power loss gear is able to choose from the various
designed gear sets. Both analytical and experimental results show that to minimize gear
power loss along with keeping loading capacity, pressure angle should be increased and
module should be reduced. The effect of this design methodology on vibration character-
istics is also investigated by measuring the vibration attributed to the sample gear sets. It
is found that the helical gear having large pressure angle, wide face width and having
helix angle about 10° to 20° is favorable, since it has more capability to transmit load,
lower power loss and also lower vibration than the reference spur gear. © 2017, Chula-
longkorn University. All rights reserved.

FULL PAPER (LINK)

ดเู พมิ่ เตมิ ไดท่วี ารสาร
Engineering Journal
ตีพมิ พป  2017 เดอื นธนั วาคม ฉบบั ท่ี 21 หนา 427-439
http://www.engj.org/index.php/ej/article/view/2051/690

หนว ยสอ่ื สารองคก ร [email protected]

Inventory-based analysis
of greenhouse gas emission
from the cement sector in Thailand

รศ. ดร.จติ ตนิ แตงเทย่ี ง ภาคว�ชาว�ศวกรรมเคร�อ่ งกล

0-2218-6638 [email protected]

ABSTRACT

The GHG inventory from the cement sector in Thailand is analyzed by using the CSI protocol. The

data are provided by five participated cement industries in the country starting from the year 2001 to

2014. The key performance indices corresponding to the GHG reduction technologies are calculated

and presented. The results indicate that the annual average of the direct CO2 emission from the
cement sector is 33.1 million tonnes of CO2, which contributes nearly 15% of the total national GHG
emission. This amount of CO2 emission originates from the calcination and the fuel combustion parts
by 21.3 and 11.8 million tonnes of CO2, respectively. The average specific net and gross CO2 emissions
are 727 and 733 kg of CO2 per tonne cementitious, respectively. The average specific indirect CO2
emission from external electricity production is 60.5 kg of CO2 per tonne cement. The average specific
thermal and electrical consumption is 3.32 GJ per tonne clinker and 117 kWh per tonne cement,

respectively. The average alternative and bio fuel thermal ratios are 2.51 and 5.24%, respectively. The

average clinker-to-cement ratio is 82.4%. From the analysis, it is indicated that the use of the bio fuels

have been an effective mitigation action in the past decade, and the use of the alternative fuels have

been employed in the last few years. The implementation of the electrical energy efficiency and the

WHR unit causes the specific indirect CO2 emission from external electricity generation decreasing
steadily over the past decade. On the other hand, the key technology for the direct CO2 reduction
potential is the clinker substitution. The availability of the clinker substitutes in the country is very

limited, but opportunity of using these substitutes should be increased in the future.

FULL PAPER (LINK)

ดเู พม่ิ เติมไดท วี่ ารสาร
Engineering Journal
ตีพิมพป  2017 เดือนกนั ยายน ฉบบั ที่ 21 หนา 125-136
http://www.engj.org/index.php/ej/article/view/1583/643

หนว ยสอ่ื สารองคก ร [email protected]

Scaling laws for
displacement of elastic
beam by energy method

รศ. ดร.จริ พงศ กสวิ �ทยอ ำนวย ภาคว�ชาว�ศวกรรมเคร่�องกล

0-2218-6634 [email protected]

ABSTRACT

This paper introduces the Engesser's first theorem to the area of
structural similarity. General derivation of the scaling laws is described and
applied to problem of symmetrical bending of elastic beam under
simultaneous application of various loading types. The applied loads
considered are concentrated forces, distributed forces, and self-weight load.
New sets of complete similarity conditions and scaling laws are
established, especially for the problem of nonlinearly elastic beams.
It has been shown that the complete similarity condition can be achieved by a
geometrically similar model or distorted model satisfying an
additional condition. The scaling laws are verified by the problems of a nonlin-
early elastic cantilever beam and linearly elastic 2-D frame,
which the displacement solutions are determined by analytical and
numerical approaches, respectively. These scaling laws are found to
accurately predict the displacement of the prototypes in all cases.

FULL PAPER (LINK)

ดูเพิม่ เตมิ ไดท่ีวารสาร
International Journal of Mechanical Sciences
ตีพิมพป  2017 เดอื นสิงหาคม ฉบับที่ 128-129 หนา 361-367
https://www.sciencedirect.com/science/article/pii/S0020740317300449

หนว ยสอ่ื สารองคก ร [email protected]

Focusing and sorting of multiple-sized
beads and cells using low-aspect-ratio
spiral microchannels

รศ. ดร.อลงกรณ พ�มพพ ณ� ภาควช� าว�ศวกรรมเคร�่องกล
0-2218-6647 [email protected]

ABSTRACT

A separation of Polystyrene micro-beads (PMBs) and natural Mast-cell
tumor cells (MCTCs) of about 10–25 μm diameter was performed using a
microfluidic spiral microchannel. In this study, five-turned spiral micro-
channels were 500 μm high and 130 μm wide with an initial radius of cur-
vature of 5.5 mm. Sorting efficacy of targeted PMB or MCTC samples of
each size by focusing them into a single stream depended on the size of
the samples and the flow rate. Flow cytometric analysis revealed that
almost 90 % of PMBs and MCTCs of 15–25 μm diameter could be success-
fully sorted from a mixture of smaller beads or cells at a flow rate of 1.0
mL/min.

FULL PAPER (LINK)

ดูเพิ่มเติมไดท ี่วารสาร
Journal of Mechanical Science and Technology
ตีพมิ พป  2017 เดือนพฤศจกิ ายน ฉบับท่ี 31 หนา 5397-5405

https://link.springer.com/article/10.1007/s12206-017-1034-z

หนว ยสอ่ื สารองคก ร [email protected]

Material and performance
characterization of Z-shaped
nickel electrothermal
micro-actuators

รศ. ดร.อลงกรณ พ�มพพณ� ภาคว�ชาวศ� วกรรมเคร�่องกล
0-2218-6647 [email protected]

ABSTRACT

The ultimate goal of this work was to develop a novel electrothermal micro-actuator,
with ease of fabrication and low-cost, using a nickel electroplating technique.
In this work, the properties of the nickel films deposited at an electroplating current
density of 7.0 mA/cm2 using two electrolytes, i.e. nickel sulfate and nickel sulfamate
solutions, were compared. From the material testing, the nickel sulfamate solution
provided a nickel film with a rougher but softer surface; therefore, the solution was chosen
in a process to fabricate the micro-actuators. The micro-actuators with a Z-shaped driving
mechanism were designed with a variation in the gap between small and large arms. Within
the range of experimental conditions, i.e. applying DC current of 3–5 A for 30 s, average tem-
perature of the driving mechanism was less than 100 °C, at which the micro-actuator with
the gap of 200 μm provided the largest displacement of around 250 ± 32 μm and the magni-
tude of the force higher than 4.5 ± 0.8 mN. All micro-actuators could appropriately respond
to a driving frequency up to 1 Hz. In addition, no significant decrement of the magnitude of
the exerting force was observed within 21,600 actuating cycles. Lastly, the micro-gripper
was fabricated and tested. The successful gripping of an asymmetrical sesame seed was
demonstrated.

FULL PAPER (LINK)

ดูเพ่มิ เติมไดท ี่วารสาร
Sensors and Actuators A: Physical
ตพี ิมพป  2017 เดอื นมกราคม ฉบับที่ 253 หนา 49-58
https://www.sciencedirect.com/science/article/pii/S0924424716309402

หนว ยสอ่ื สารองคก ร [email protected]

Modification of a substrate roughness
for a fabrication of freestanding
electroplated metallic microstructures

รศ. ดร.อลงกรณ พ�มพพณ� ภาคว�ชาว�ศวกรรมเคร่�องกล
0-2218-6647 [email protected]

ABSTRACT

This study aims to demonstrate a simple fabrication technique of freestanding
electroplated metallic microstructures by modifying a substrate roughness. The pro-
posed technique utilizes counter effects between two forces, i.e. an intrinsic force
causing shrinkage in an electroplated metallic microstructure, and an adhesive force
adhering a metallic microstructure to a substrate. With the modification of substrate
roughness until the adhesive force becomes weaker than the induced intrinsic force,
electroplated metallic microstructures would spontaneously release from the sub-
strate after the electroplating process. Three parameters, i.e. substrate roughness,
electroplated square structure’s area and electroplated rectangular structure’s
width-to-length ratio, were experimentally studied. The results showed that the
electroplated structure with a smaller size and smaller width-to-length ratio was
more easily detached from the substrate for a given substrate roughness. In addi-
tion, for the same electroplated structure, a substrate with less roughness allowed a
detachment of electroplated microstructure more easily.

FULL PAPER (LINK)

ดเู พิ่มเติมไดท ่วี ารสาร
Engineering Journal
ตพี ิมพป 2017 เดอื นมกราคม ฉบับท่ี 21 หนา 145-154
http://www.engj.org/index.php/ej/article/view/1043/526

หนว ยสอ่ื สารองคก ร [email protected]

The viability of single cancer cells after
exposure to hydrodynamic shear stresses
in a spiral microchannel:
A canine cutaneous mast cell tumor
model

รศ. ดร.อลงกรณ พ�มพพณ� ภาคว�ชาวศ� วกรรมเครอ�่ งกล
0-2218-6647 [email protected]

ABSTRACT

Our laboratory has the fundamental responsibility to study cancer stem cells (CSC) in
various models of human and animal neoplasms. However, the major impediments that
spike our accomplishment are the lack of universal biomarkers and cellular heterogeneity.
To cope with these restrictions, we have tried to apply the concept of single cell analysis,
which has hitherto been recommended throughout the world as an imperative solution
pack for resolving such dilemmas. Accordingly, our first step was to utilize a predesigned
spiral microchannel fabricated by our laboratory to perform size-based single cell separation
using mast cell tumor (MCT) cells as a model. However, the impact of hydrodynamic shear
stresses (HSS) on mechanical cell injury and viability in a spiral microchannel has not been
fully investigated so far. Intuitively, our computational fluid dynamics (CFD) simulation has
strongly revealed the formations of fluid shear stress (FSS) and extensional fluid stress (EFS)
in the sorting system. The panel of biomedical assays has also disclosed cell degeneration
and necrosis in the model. Therefore, we have herein reported the combinatorically
detrimental effect of FSS and EFS on the viability of MCT cells after sorting in our spiral
microchannel, with discussion on the possibly pathogenic mechanisms of HSS-induced cell
injury in the study model.

FULL PAPER (LINK)

ดูเพิม่ เติมไดที่วารสาร
Micromachines
ตพี ิมพป 2017 เดือนพฤศจกิ ายน ฉบับที่ 9 หมายเลขบทความ 9

http://www.mdpi.com/2072-666X/9/1/9

หนว ยสอ่ื สารองคก ร [email protected]

Adaptive gain control for a two-axis,
H-frame-type, positioning system

ผศ. ดร.กฤษฎา พนมเชิง ภาคว�ชาว�ศวกรรมเคร�่องกล
0-2218-6630
[email protected]

ABSTRACT

XY gantry systems play an important role in many applications in diverse indus-
tries, where they are used to position a part or tool along the xy plane within the
working area of the system. The increased demand for enhanced performance and
low cost of XY gantry systems has driven research to develop alternative structural
designs and improve their capabilities. A two-axis, parallel H-frame XY positioning
system (H-Bot) is of increasing interest as a candidate for development due to its
low number of moving parts, lightweight, low cost and speed of the system. How-
ever, the system has an uncertainty of cart or end-effector position when moving
at high speed because of the friction and flexibility of the elastic timing belt. The
H-bot developed here using an adaptive gain control showed a good repeatability
and improved accuracy, reducing the root mean square error between the desired
and the actual trajectory of 32.7% and 53.2% on the x-axis and y-axis, respectively,
for drawing a 80 mm diameter circle in 36 seconds.

FULL PAPER (LINK)

ดเู พ่มิ เตมิ ไดทว่ี ารสาร
Engineering Journal
ตพี ิมพป 2017 เดือนมถิ ุนายน ฉบบั ที่ 21 หนา 223-234
http://www.engj.org/index.php/ej/article/view/1251/566

หนว ยสอ่ื สารองคก ร [email protected]

Circle criterion-based observer

design for Lipschitz and monotonic nonlinear

systems - Enhanced LMI conditions and

constructive discussion

ผศ. ดร.กฤษฎา พนมเชงิ ภาควช� าวศ� วกรรมเครอ่� งกล
02-218-6630
[email protected]

ABSTRACT

A new LMI design technique is developed to address the problem of circle
criterion-based ℋ∞ observer design for nonlinear systems. The developed technique
applies to both locally Lipschitz as well as monotonic nonlinear systems, and allows for
nonlinear functions in both the process dynamics and output equations. The LMI
design condition obtained is less conservative than all previous results proposed in
the literature for these classes of nonlinear systems. By judicious use of a modified
Young’s relation, additional degrees of freedom are included in the observer design.
These additional decision variables enable improvements in the feasibility of the
obtained LMI. Several recent results in the literature are shown to be particular cases
of the more general observer design methodology developed in this paper. Illustrative
examples are given to show the effectiveness of the proposed methodology. The
application of the method to slip angle estimation in automotive applications is
discussed and experimental results are presented.

FULL PAPER (LINK)

ดเู พิ่มเติมไดท ่วี ารสาร
Automatica
ตีพิมพป  2017 เดอื นพฤศจกิ ายน ฉบับท่ี 85 หนา 412-425

https://www.sciencedirect.com/science/article/pii/S0005109817304168

หนว ยสอ่ื สารองคก ร [email protected]

Developing vibrotactile haptic stimuli
based on measured human capabilities

ผศ. ดร.กฤษฎา พนมเชงิ ภาควช� าวศ� วกรรมเคร�่องกล
0-2218-6630
[email protected]

ABSTRACT

This paper describes an approach to design tactile haptic signals that help humans “visual-
ize” an environment through the use of a vibrotactile haptic wristband that has four vibration
motors. A human response map to tactile input while sitting was determined experimentally.
It shows the zones where humans can classify signals with a high success rate based on mini-
mum Duration of Stimulus (DOS) (“on” periods) and “off” periods of the haptic signals. It was
also shown experimentally that a human’s ability to recognize tactile patterns depends on the
level of engagement required by the activity. This paper provides an approach to predict a
human response map for various activities. The map during sitting is used to design the signals
to send information to a human. Two types of signals are developed: sequence stimuli and digi-
tal codes. Sequence stimuli create an on/off rhythm for the vibration motors that humans can
sense directly without a decoding process. Experiments show that humans can recognize 10
levels of sequence stimuli with a success rate greater than 80%. This class of signals is useful for
applications where information must be repeated frequently, e.g., range information sent to a
human parking a car. The second class of signals is digital codes, similar to Morse code, where
a sequence of long and short motor DOS represents each code. The meaning of the signal is
associated with a specific code. From 27 digital codes, experiments showed a successful recog-
nition rate of 78.7%. An application for the digital code method is to pick specific menu items,
based on the codes, for fast food restaurants. © 2017, Springer-Verlag London.

FULL PAPER (LINK)

ดูเพม่ิ เติมไดทีว่ ารสาร
Virtual Reality
ตีพมิ พป  2017 เดือนพฤศจกิ ายน ฉบับท่ี 21 หนา 203-212
https://link.springer.com/article/10.1007%2Fs10055-017-0309-0

หนว ยสอ่ื สารองคก ร [email protected]

On the difference between bounded
jacobian and lipschitz observers
for nonlinear estimation applications

ผศ. ดร.กฤษฎา พนมเชิง ภาคว�ชาว�ศวกรรมเคร่อ� งกล
0-2218-6630
[email protected]

ABSTRACT

This paper examines the performance of bounded Jacobian and
Lipschitz observer design techniques for nonlinear estimation appli-
cations. The bounded Jacobian observer technique utilizes the mean
value theorem to express the nonlinear estimation error dynamics as
a convex combination of known matrices with time varying coeffi-
cients. The Lipschitz based observers are the most popular observer
design technique used for nonlinear systems. But they are derived
from more conservative Lipschitz conditions on the nonlinearity.
Both observers are evaluated for longitudinal velocity estimation,
vehicle roll angle estimation, and estimation in a polynomial nonlin-
ear system with a large Lipschitz constant. The results show that the
bounded Jacobian observer is the more appropriate observer for
these problems.

FULL PAPER (LINK)

ดเู พิม่ เตมิ ไดทว่ี ารสาร
Transactions of the Canadian Society for Mechanical Engineering
ตีพมิ พป 2017 เดอื นมกราคม ฉบับที่ 3 หนา 395-415

https://www.nrcresearchpress.comdoi/10.1139/tcsme-2017-1028#.XOS3ssgza70

หนว ยสอ่ื สารองคก ร [email protected]

Catalytic activity of oxidation
pretreated Hastelloy
for methanol steam reforming

ผศ. ดร.สมพงษ พท� ธิว�สุทธิศักด์ิ ภาคว�ชาว�ศวกรรมเครอ่� งกล
0-2218-6642 [email protected]

ABSTRACT

Hastelloy, a Ni containing alloy, was investigated to improve its catalytic activity
on bio-oil steam reforming by oxidation pretreatment. Methanol as the major
composition of bio-oil was used as a model compound. The untreated Hastelloy
presented low methanol conversion with high selectivity of methane. After oxi-
dation pretreatment, the Hastelloy showed good activity towards methanol
steam reforming. The Cr and Mn promoters on the surface increased with the
increase of oxidation temperature, resulting in the improvement of steam reform-
ing activity. The Ni alloy appeared after pretreatment and controlled the oxida-
tion state of Ni, leading to the decrease of methanation. The oxidation pretreat-
ment at 1273 K provided the highest catalytic performance, but the agglomeration
apparently occurred. The scales on the surface combined together when the oxida-
tion was longer than two hours. Therefore, the optimal oxidation pretreatment con-
dition was at 1273 K for two hours.

FULL PAPER (LINK)

ดเู พิ่มเติมไดทีว่ ารสาร
Chemical Engineering Transactions
ตพี ิมพป  2017 ฉบบั ที่ 57 หนา 961-966
http://www.aidic.it/cet/17/57/161.pdf

หนว ยสอ่ื สารองคก ร [email protected]

Effect of flow arrangement on micro
membrane reforming for H
production from methane

ผศ. ดร.สมพงษ พ�ทธิวส� ทุ ธิศกั ด์ิ ภาคว�ชาวศ� วกรรมเครอ�่ งกล
0-2218-6642 [email protected]

ABSTRACT

Three-dimensional computational fluid dynamics (CFD) simulation of methane reforming
reaction in micro membrane reformer was performed to compare the effects of the parallel
arrangement and the checked arrangement on reformer efficiency. At the predetermined base
condition, methane conversions of 54.93% and 59.28% were obtained from the parallel arrange-
ment and the checked arrangement, respectively. In terms of hydrogen separation factor, the
checked arrangement provided 77.75% separation which was higher than the parallel arrange-
ment by 4.92%. Furthermore, only half of the membrane area was effectively utilized in parallel
arrangement, and hydrogen accumulation occurred. Similar results were obtained when operat-
ing and design parameters were changed. Methane conversion and hydrogen separation were
significantly higher when the checked arrangement was used. The effects of the arrangement
were increased with the increase of temperature, GHSV of SC and channel width, but the increase
of GHSV of RC and reactor length weakened the effects. In this type of flow pattern, the entire
membrane area was utilized and hydrogen flux is enhanced. Efficient separation of hydrogen in
turn promoted methane conversion by equilibrium shift. Therefore, the checked arrangement
significantly improved reactor performance and is recommended to be employed in micro mem-
brane reactors.

FULL PAPER (LINK)

ดเู พิ่มเตมิ ไดที่วารสาร Effect of flow arrangement on
micro membrane reforming for
Chemical Engineering Journal H2 production from methane
ตีพิมพป 2016 ฉบับที่ 293 หนา 319-326

https://www.sciencedirect.com/science/article/pii/S1385894716301760

หนว ยสอ่ื สารองคก ร [email protected]

Modeling of thermally-coupled
monolithic membrane reformer
for vehicular hydrogen production

ผศ. ดร.สมพงษ พ�ทธวิ �สทุ ธศิ ักดิ์ ภาคว�ชาว�ศวกรรมเคร่อ� งกล
0-2218-6642 [email protected]

ABSTRACT

A thermally-coupled monolithic membrane reformer (TMMR) is a heat and membrane integrated
reformer for portable hydrogen production. This study simulates the TMMR using Aspen Plus software to find
the appropriate monolith design and operation parameters to achieve optimal energy efficiency and hydro-
gen production within a small volume reactor. Different types of fuels, i.e. methane, methanol and ethanol,
and various operating conditions, including molar flow rate of fuel (0.01–0.05 mol/s for combustion and
0.1–0.5 mol/s for reforming) and reforming pressure (3–5 atm), were investigated via thermodynamic equilib-
rium analysis. When methanol and ethanol were used as feedstocks, a reverse water-gas-shift reaction
occurred, resulting in a decrease of energy efficiency. While using methane as a feedstock with a specific
molar flow rate of 0.03 mol/s for the combustion reaction, 0.30 mol/s for the reforming reaction, and a reform-
ing pressure of 4 atm, significant improvement of efficiency was observed. At the same time, the performance
of the TMMR design was simulated based on the surface area of different sizes and configurations of mono-
lith, i.e. parallel and checked arrangements, by using a kinetic-based model approach. The highest efficiency
achieved was from the checked arrangement of monolith with 200 cpsi of cell density, 150 mm of diameter
and length, and exchange area of around 1.5 m2. This design requires a small space of only 2.65 L in volume
to provide 129 kW of hydrogen energy production with 44.0% efficiency. In conclusion, the proposed design
and conditions could be a benchmark for future research on efficient compact reformers for vehicular appli-
cations.

FULL PAPER (LINK)

ดเู พ่ิมเติมไดท ีว่ ารสาร

International Journal of Hydrogen Energy
ตีพมิ พป 2017 ฉบับที่ 42 หนา 26308-26319

https://www.sciencedirect.com/science/article/pii/S0360319917335553

หนว ยสอ่ื สารองคก ร [email protected]

Model-based predictive control
for building energy management:
Part II – Experimental validations

ผศ. ดร.สรลั ศาลากิจ ภาควช� าว�ศวกรรมเคร่อ� งกล
0-2218-6622 [email protected]

ABSTRACT

Indoor climate control of thermal comfort for humans in a residential or commercial
building is a major component of building energy management. The goal of optimal
temperature and humidity control is to ensure indoor comfort with minimal energy
consumption. Model-Based Predictive Control (MBPC) is considered to be one of the
most suited solutions to achieve this goal due to its ability to use building dynamics,
occupancy schedule, and weather conditions for optimal control. The development and
verification of MBPC have been discussed in the Part I . Here, to validate that MBPC
achieves reduced energy consumption, while simultaneously satisfying comfort
conditions, experiments are performed on a quarter scale shelter structure in a
climate-controlled environmental chamber. The MBPC method is compared to three
other control methods: conventional constant temperature setpoint control, scheduled
control using a Honeywell smart thermostat, and scheduled control using Labview.
Temperature variations and energy consumptions resulting from the four methods are
analyzed. Compared to the three other methods, MBPC yields superior control
performance with lowest energy consumption while still maintaining indoor thermal
comfort. We also demonstrate that use of MBPC can reduce the number of sensors
required for effective local control.

FULL PAPER (LINK)

ดเู พม่ิ เติมไดท ี่วารสาร
Energy and Buildings
ตีพมิ พป  2017 เดอื นกรกฎาคม ฉบบั ท่ี 146 หนา 19-26
https://www.sciencedirect.com/science/article/pii/S0378778817312938

หนว ยสอ่ื สารองคก ร [email protected]