abstract book of siit-tcu seminar 2015 · siit-tcu seminar 2015 program monday october 19, 2015...

SIIT-TCU Seminar 2015

Abstract Book of SIIT-TCU Seminar 2015

October 19, 2015

Sirindhorn International Institute of Technology Thammasat University

Rangsit Cmapus

Editors

Itthisek Nilkhamhang, Gangchai Tanapornraweekit (SIIT) Masaki Kyoso, and Osamu Maruyama (TCU)

II SIIT-TCU Seminar 2015

Organized and supported by: Tokyo City University (TCU), Japan

Sirindhorn International Institute of Technology (SIIT), Thailand

III SIIT-TCU Seminar 2015

Program

Monday October 19, 2015

08:30-09:00 Registration (SIIT RS 1-503)

09:00-09:05 Opening Address by Prof. Dr. Somnuk Tangtermsirikul Director of Sirindhorn International Institute of Technology

09:05-09:10 Opening Address by Head of TCU Delegation (Prof. Dr. Masaki Kyoso and Prof. Dr. Osamu Maruyama)

09:10-09:30 Introduction to Sirindhorn International Institute of Technology by Asst. Prof. Dr. Itthisek Nilkhamhang

09:30-09:50 Introduction to Tokyo City University by Prof. Dr. Masaki Kyoso and Prof. Dr. Osamu Maruyama

09:50-09.55 Presentation of Souvenirs and Group Photo

09:55-10:10 Coffee Break

10:10-12:00 ICT Session 1 (SIIT RS 1-503) CET Session 1 (Library, 2nd Floor)

12:00-13:30 Lunch


14:30-14:50 Coffee Break


IV SIIT-TCU Seminar 2015

Contents

Program III Topics in ICT – Session 1 – Communication Engineering – 10:10-12:00 Introduction to ICT Research at SIIT Itthisek Nilkhamhang Introduction to ICT Research at TCU Masaki Kyoso Adaptive Hybrid Wireless Sensor Network for Border Security 2 Wichai Pawgasame and Komwut Wipusitwarakun Policies for Channel Allocation in Cognitive Radio Networks using Game Theory 3 Amulya Bhattarai and Prapun Suksompong An Efficient Flooding Scheme Using Chaotic Neural Networks in 4 Wireless Sensor Networks Tomoyuki Sasaki, Hidehiro Nakano and Arata Miyauchi Broadband Measurement System for the Specific Absorption Rate above 300 MHz 5 Ryo Shimofusa and Yoshinobu Okano M-ORAM: A Matrix ORAM with logN Bandwidth Cost 6 Karin Sumongkayothin, Chuhua Su, Steven Gordon and Atsuko Miyaji Best-response Distributed Subchannel Selection for Minimizing Interference in 7 Non-cooperative and Cooperative Small Cell Networks Shashi Shah, Yuto Lim and Somsak Kittipiyakul Effective Loading Method of Magnetic Sheet for the NFC Antenna 8 Takaho Sekiguchi and Yoshinobu Okano A Study on Spray Cloud Behavior by Changing the Terrain around the Waterfall 9 Yuto Hizono

V SIIT-TCU Seminar 2015

Topics in ICT – Session 2 – Biomedical Engineering – 13:30-14:30 Automatic Detection of Diabetic Retinopathy Exudates from Non-Dilated Retinal Images 11 Faisal Ghaffar Inferior Alveolar Canal Segmentation in Cone Beam Computed Tomography Images 12 using an Adaptive Diffusion Flow Active Contour Model Chadaporn Keatmanee, Stanislav S. Makhanov, Kazunori Kotani, Toshiaki Kondo and Saowapak S. Thongvigitmanee Approach for Fast Contour Extraction and Reconstruction (3D visualization) 13 in Actual Bio-Medical Tomography Image Yoshiyuki Kamakura Color Image Processing Based On Human Visual System 14 Shiori Arii Signal Analysis Techniques for Brain-Computer Interface 15 Kazuki Kinjo A Signal Conditioning Circuit for Electroencephalogram-Based Brain-Computer Interface 16 Toshiki Shima Topics in ICT – Session 3 – Biomedical Engineering – 14:50-16:10 A Drowsiness Detection Method based on Distance and Gradient Vectors 17 Sorn Sooksatra, Toshiaki Kondo and Pished Bunnun Real time Contact-free Heart Rate Measurement Using a Webcam 18 Vasitphon Pawankiattikun and Toshiaki Kondo Unconscious Respiratory Signal Extraction by Cervical Sound Analysis 19 Shun Kanai Somatosensory and motor Evoked Potential Measurements for 20 Spinal Cord Injury Assessment Kana Matsumoto Biomedical Engineering Research at Chiba University Yukinojo Kitakami, Takayuki Okamoto, Kohei Satoh, Takuya Tanaka, Minori Takahashi, Yoko Kurabuchi

VI SIIT-TCU Seminar 2015

Topics in CET – Session 1 – Civil Engineering – 10:10-12:00 Introduction to CET Research at SIIT Winyu Rattanapitikon Introduction to CET Research at TCU Osamu Maruyama Experimental Comparative Study on Strength, Slump and Heat Evolution of Concrete 22 Containing Fly Ash and Ground Granulated Blast Furnace Slag Arosha Dabarera, Warangkana Saengsoy and Somnuk Tangtermsirikul Effect of Tapioca Starch on Fresh Properties Concrete 23 Samita Chaikasatsin Construction of the Recycling System of the Concrete by Acid Dissolution 24 Tomohiko Ogawa Observation of a crack blockade of Strain Hardening 25 Cementitious Composites by Self-healing Kazuki Watanabe Study on BIM Utilization for Design Improvement of Infrastructure Project 26 Yuya Sajima Experimental study of Structural Health Monitoring 27 Sho Nozaka Detection of Fatigue Crack in Weld Bead Using the Eddy Current Flaw Detection 28 Shingo Sekimoto Inspection, Evaluation, and Repair guidelines in practice for steel building in Thailand 29 Warakorn Tantrapongsaton and Taweep Chaisomphob

VII SIIT-TCU Seminar 2015

Topics in CET – Session 2 – Civil Engineering – 13:30-14:30 Investigation of Effective Elastic Properties of Frame-Like Periodic Cellular Solids 30 by Strain-Energy-Based Homogenization Kasem Theerakittayakorn and Pruettha Nanakorn Finite Element Analysis on Soil Nail Layout for improvement of Slope Stability 31 Yosuke Watarida Experiment of Anchor Drawing for Prevention of Crash Disaster from Slope 32 Shoichi Okaniwa Optimal Arrangement of Observation Points based on Value of Information 33 Yosuke Tasaki Numerical Analysis of Relation Between A Index of Seawater Exchange: Age and 34 Forming Hypoxia in ISE-Bay, Japan Kasumi Ikeda Energy Dissipation Models for Computing Statistical-based and Spectral-based 35 Root-Mean-Square Wave Heights Nga Thanh Duong, Winyu Rattanapitikon and Tawatchai Tingsanchali Topics in CET – Session 3 – Civil Engineering – 14:50-16:00 Municipal Solid Waste Management and Application of 36 Serial-Self Turning Reactors (STRs) Technology for local government Taweep Chaisomphob amd Chutimon Somboonmark Co-composting of Municipal Solid Waste (MSW) with Chicken Manure by using 37 ‘Serial Self-Turning Reactor’ (STR) System Linh Hoang Tran and Taweep Chaisomphob Development of Tama Den-en-toshi 38 Satoshi Tanaka Ranking of Hazardous Highway Locations in Thailand 39 Ponjanat Ubolchay and Mongkut Piantanakulchai Travel Time Estimation Based on Fused Traffic State Data: Case Studies in 40 US and South Korea Soknath Mil and Mongkut Piantanakulchai

VIII SIIT-TCU Seminar 2015

A Study on Traffic State Patterns in Urban Area: A Case Study of Bangkok, Thailand 41 Kimheang Ly, Mongkut Piantanakulchai and Sornthep Vannarat

-- 1 --

SIIT-TCU Seminar - October 19, 2015

Topics in ICT

Communication Engineering

-- 2 --


Adaptive Hybrid Wireless Sensor Network for Border

Security

Wichai Pawgasame and Komwut Wipusitwarakun

School of Information, Computer, and Communication Technology

Sirindhorn International Institute of Technology, Thammasat University E-mail: [email protected]

ABSTRACT

A border of one country can be stretched over thousand kilometers, and some border regions are

hardly accessible by human. Border regions are threatened by illegal border crossing such as drug

trafficking, human smuggling, human trafficking, and insurgencies. Providing protection of such

massive area requires a lot of resources in term of budgets and human resources. With current

sensor and wireless networking technologies, a large number of sensors can be deployed as a

network in the border region to provide border protection with less effort of human and lower

budget. However, deployment of sensor network for border security application is not a simple

task. The characteristics of border region which is stretched along a borderline and located in a

remote and harsh area requires specific functionalities that traditional wireless sensor network

cannot offer. One type of sensor cannot complete the task required by the application, and

dynamic nature of the area require adaptability of the network. This work explores a novel wireless

sensor network that should be able to perform distribute sensing and self-adaptation of hybrid

sensors in order to provide quality of services required by the border security application under

the resource constraints and harsh environment of border region. The challenges are related to

explore novel adaptive hybrid wireless sensor network architecture, adaptive communication

protocol, adaptive sensor management mechanism, and distribute sensing of hybrid sensors.

KEYWORDS

Wireless Sensor Network, Adaptive Sensor Management, Border Security, Distributed

Sensing.

-- 3 --


Policies for Channel Allocation in Cognitive Radio

Networks using Game Theory

Amulya Bhattarai and Prapun Suksompong

School of Information, Computer, and Communication Technology Sirindhorn International Institute of Technology, Thammasat University

E-mail: [email protected], [email protected]

ABSTRACT

Cognitive radio networks (CRN) evolve according to the actions of selfish users who act

independently. A global optimal allocation obtained from a centralized and co-operative CRN is

impractical in a distributed CRN as the selfish and independent SUs will deviate from such a

solution if they find a way to increase their own payoff. This deviation will not occur if the system is

operating at one of the equilibrium state, Nash Equilibrium. Multiple NE with different quality may

exist. In this work we consider the problem of allocating channels to multiple transceivers, users of

the CRN. Based on the policies developed from the probability distribution function (pdf) of

various network metrics like received power strength and interferences at NE; we develop a way

to initialize the allocation of channel for each user to push the system towards a higher

normalized cumulative total throughput of the CRN. A novel equation is derived and algorithms

based on best response techniques are proposed for channel allocation. The improvement is

confirmed by our simulation results.

KEYWORDS

Cognitive radio network (CRN), policy for channel allocation, game theory, Nash Equilibrium,

refined utility terms.

-- 4 --


An Efficient Flooding Scheme Using

Chaotic Neural Networks in Wireless Sensor Networks

Tomoyuki Sasaki, Hidehiro Nakano and Arata Miyauchi

Graduate School of Engineering, Information Engineering Course, Computer System Lab., Tokyo City University

E-mail: [email protected]

ABSTRACT

Recently, Wireless Sensor Networks (WSNs) have been studied with a great amount of interests. In

WSNs, flooding is required for the dissemination of queries and event announcements. The

original flooding causes the overlap problems. In the original flooding, each sensor node receiving

a broadcast message forwards it to its neighbors, resulting in a lot of collisions and duplicate

messages. For dense WSNs, the impact caused by the original flooding may be overwhelming.

The original flooding may result in the reduced network lifetime. Therefore, the selection of

forwarding nodes for the dissemination of queries and event announcements is needed to

prolong the lifetime of WSNs. In this study, we use the Chaotic Neural Networks (CNN) to

selection of forwarding nodes for the dissemination of queries and event announcements

considering load balancing in WSNs. We evaluate the applicability of CNN by computer

simulations and discuss its development potential.

KEYWORDS

Wireless sensor networks, Forwarding nodes, Chaotic neural networks

-- 5 --


Broadband Measurement System for the Specific

Absorption Rate above 300 MHz

Ryo Shimofusa and Yoshinobu Okano

Graduate School of Engineering, Information Engineering Course, Communication Systems Lab., Tokyo City University

E-mail:[email protected], [email protected]

ABSTRACT

The specific absorption rate (SAR) is an indicator of the thermal effects caused by microwave

exposure in biological tissues. Electric field probe scanning has been used as a practical SAR

evaluation technology until now. A measurement standard is necessary for any physical quantity.

In general, the existence of a standard constructed with a physically different procedure is

important in uncertainty evaluation of the measurement standard.

In this report, a Thermal Evaluation System for SAR (TESS) is proposed. An actual TESS is achieved

by measuring the temperature rise in a semisolid phantom irradiated with microwaves. When a

thermoelectric thermal sensor is used, there is the concern that a metal wire connected to the

sensor could disturb the electromagnetic field in the semisolid phantom. Accordingly, an optical

fiber thermal sensor is used for the measurement of the temperature rise caused in the semisolid

phantom by the microwave exposure.

To confirm the validity of TESS, the comparison results between experiments and the numerical

analysis are described below. The comparison verification is executed in the frequency area of

300 - 6000 MHz often used in recent years.

KEYWORDS

Optical fiber thermal sensor, Thermal Evaluation System for SAR (TESS), FDTD, Semisolid phantom

-- 6 --


M-ORAM: A Matrix ORAM with logN Bandwidth Cost Karin Sumongkayothin*+, Chuhua Su*, Steven Gordon+ and Atsuko Miyaji*

*Japan Advance Institute of Science and Technology (JAIST) +School of Information, Computer, and Communication Technology

Sirindhorn International Institute of Technology (SIIT), Thammasat University E-mail: [email protected], [email protected], [email protected], [email protected]

ABSTRACT

Oblivious RAM can hide a client's access pattern from a mistrusted server. However current ORAM

algorithms incur large communication or storage overheads. We propose a novel ORAM

construction using a matrix structure for server storage where a client downloads blocks from

each row, choosing the column randomly to hide the access pattern. Both a normal and recursive

construction are presented, achieving bandwidth cost of O(1) and O(log N), respectively, and client

storage similar to Path ORAM. We show under the same conditions, our matrix ORAM reduces

bandwidth cost compared to Path ORAM by 𝑙𝑜𝑔𝑁2 .

KEYWORDS

ORAM, Secured access pattern, Secured protocol

-- 7 --


Best-response Distributed Subchannel Selection for

Minimizing Interference in Non-cooperative and

Cooperative Small Cell Networks

Shashi Shah1, Yuto Lim2 and Somsak Kittipiyakul3

1,3School of Information, Computer, and Communication Technology Sirindhorn International Institute of Technology, Thammasat University

1,2School of Information Science, Japan Advanced Institute of Science and Technology E-mail: [email protected], [email protected], [email protected]

ABSTRACT

The Small cells are envisioned to improve coverage and system capacity through spatial reuse in

the next-generation cellular wireless networks. However, dense and random deployment of small

cells will make traditional centralized network planning infeasible. Interference management

becomes a critical issue under such scenario. We model the interference management problem as

a subchannel selection problem of orthogonal frequency division multiple access (OFDMA) small

cells. Using a physical channel model, we consider distributed subchannel allocation of small cells

and a total capacity objective. We assume a time-slotted system, a time-invariant channel model

(no fading), each user knows the signal-to-noise-ratio (SINR) of all channels, and the subchannel

selection happens only at the beginning of each time-slot. We study the performance of a best-

response strategy where each user chooses to transmit in the highest-SINR channel. First, we

consider non-cooperative OFDMA small cells and show that if all users update their actions every

time-slot (i.e., all users make simultaneous moves), an oscillation can occur and result in the worst

performance. To avoid the oscillation and achieve better performance, we propose a stochastic

best-response algorithm, where each user updates its channel selection with a selection

probability p. Second, we introduce cooperative interference management framework among

various small cell vendors enabling cooperative channel borrowing such that an overloaded small

cell base station (SBS) can utilize more channels from neighboring SBS. Using the perspective of

game theory, we justify that it is SBSs’ best strategy to cooperate such that both the individual as well as overall network capacity are improved.

KEYWORDS

Small cells, interference management, distributed subchannel selection, best-response, Nash

equilibrium.

-- 8 --


Effective Loading Method of

Magnetic Sheet for the NFC Antenna

Takaho Sekiguchi and Yoshinobu Okano

Graduate School of Engineering, Information Engineering Course, Communication Systems Lab., Tokyo City University

E-mail: [email protected],[email protected]

ABSTRACT

NFC and HF-RFID system are used as the traffic toll collection system or the electric money system

(such as SUICA, PASMO or EDY) in Japan. Recently, the situation that these systems are installed

into the smart phone is increasing. However, the antenna performances for R/W (Reader/Writer)

or tag used with these systems are remarkably deteriorated with adjacent metallic objects. The

reason is that actual electric current on NFC/HF-RFID antenna is suppressed by induction electric

current generated with metallic objects. When there is large gap between NFC/HFRFID antennas

and metallic objects, its communication performance is recovered. Because it is necessary to

suppress the smart phone's thickness, the NFC/HF-RFID antenna's thickness should be also thin.

Thus it is difficult to keep large gap between NFC antennas and metallic objects. Therefore, thin

magnetic sheet with high permeability is inserted instead of keeping large gap between them.

As for the insertion magnetic sheet, thin compound magnetic sheet or thin sintered ferrite has

been used. However, when the compound magnetic sheet is used, its thickness should be

increased to improve the performance of NFC antenna. On the other hand, sintered ferrite sheet

is not easy handling because it is expensive and fragile. In this paper, the use of amorphous sheet

that the permeability is higher than compound magnetic or sintered ferrite sheet is proposed. The

performance of NFC antenna can be expected to improve even if it is thinner than the compound

magnetic or sintered ferrite sheet because amorphous sheet's permeability is high. In contrast,

because a magnetic loss of amorphous sheet is larger than that of other sheet, the insertion

technique to NFC antenna should be investigated carefully. The results about studying the control

of a magnetic loss by the shape of amorphous sheet are also described in this paper.

KEYWORDS

NFC, RFID tags, Impedance matching, Inductance

-- 9 --


A Study on Spray Cloud Behavior by

Changing the Terrain around the Waterfall

Yuto Hizono

Faculty of Knowledge Engineering, Department of Computer Science, Computer Vision and Graphics Lab., Tokyo City University


ABSTRACT

In recent years, there have been many researches in the field of computer graphics. Physics-based

fluid visualization is one of the most challenging issues in the field of computer graphics. In this

paper, I report the simulation of waterfall including spray cloud in different environments. For

simulating the waterfall, it needs a huge amount of computer resources such as calculation power

and memory. Then, our laboratory has tried to simulate the waterfall by dividing it into three parts:

water stream, splashing spray, and spray cloud. By using this method, the behavior of the water

stream and splashing spray can be simulated correctly. However, even though we have tried to

incorporate many physical factors, the amount of the soaring up of the spray cloud was not

enough. Therefore, in this report, I incorporate the terrain model around the waterfall so that the

spray cloud is soaring up along the terrain slope. I have tested the simulation with various terrain

settings, and found that the height of the rocks in front of the waterfall does not affect the

behavior of the spray cloud. On the other hand, the slope angle of the rocks in front of the

waterfall affects the behavior of the spray cloud. As shown in these results, I confirm that slope

angle is more important than the height of the rocks.

KEYWORDS

Computer graphics, Physics-based simulation, Waterfall simulation

-- 10 --


Topics in ICT

Biomedical Engineering

-- 11 --


Automatic Detection of Diabetic Retinopathy Exudates

from Non-Dilated Retinal Images

Faisal Ghaffar



ABSTRACT

The research mainly focus on development of an efficient system for screening of diabetic

retinopathy. Diabetic retinopathy is the major cause of blindness. Early detection of disease can

help in preventing the incidence. Currently, detecting DR is a time-consuming and manual process

that requires a trained clinician. The expertise and equipment required are often lacking in areas

where the rate of diabetes in local populations is high and DR detection is most needed. The need

for a comprehensive and automated method of DR screening has long been recognized, and

previous efforts have made good progress using image classification, pattern recognition, and

machine learning. The appearance of micro aneurysms, hemorrhages and exudates represent the

degree of diabetic retinopathy. Our Aim in this research is to detect these primary signs of

diabetic retinopathy from low contrast and non-dilated pupils images. In this technique contrast

enhancement pre-processing is applied. From the processed images we extract features. Further

we train a neural a neural network through these features. Finally we check test images with

trained neural network and then compare the result with ophthalmologists hand drawn ground

truth.

KEYWORDS

Image processing, Diabetic retinopathy, Exudates detection,

-- 12 --


Inferior Alveolar Canal Segmentation in Cone Beam

Computed Tomography Images using an Adaptive

Diffusion Flow Active Contour Model

Chadaporn Keatmanee1,2, Stanislav S. Makhanov1, Kazunori Kotani2, Toshiaki Kondo1 and

Saowapak S. Thongvigitmanee3

1School of Information, Computer, and Communication Technology Sirindhorn International Institute of Technology, Thammasat University

E-mail: [email protected], [email protected] 2School of Information Science

Japan Advanced Institute of Science and Technology E-mail: [email protected]

3National Electronics and Computer Technology Center E-mail: [email protected]

ABSTRACT

The success of dental implant surgery is subject to accurate advanced planning. In order to

properly plan for suitable implant placement, it is necessary for accurate segmentation of the

inferior alveolar canal. This paper presents a new approach of a semi-automatic method based on

a new and effective active contour model viz. an adaptive diffusion flow active contour model.

Cone-beam computed tomography (CBCT) image is used as a dataset to extract different views of

an inferior alveolar canal. The method has been tested in a ground truth set and evaluated using

three similar indicators (the Jaccard index, Dice's coefficient, and Overlap coefficient), achieving

promising results in all of them (0.908±0.016, 0.947±0.008, and 0.954±0.008, respectively).

Moreover, the presented results show that our method obtains higher accuracy values when

compared with GVF snake. The method has proven to be significantly accurate and is possibly

integrable in current dental implant surgery planning systems.

KEYWORDS

Inferior alveolar nerve canal, Active contour model, Segmentation, Cone beam computed

tomography

-- 13 --


Approach for Fast Contour Extraction and

Reconstruction (3D visualization)

in Actual Bio-Medical Tomography Image

Yoshiyuki Kamakura

Faculty of Information Science and Technology, Osaka Institute of Technology E-mail: [email protected]

ABSTRACT

In previous articles [1]-[3], Prof. Shirazi and I introduced a class of region-based deformable

contour models, called “R-Centipedes”. R-Centipedes are advanced Active Contour Models (ACM)

based on Snakes (Kass et al, 1988) which are one of the most promising techniques for extraction

of complex objects from digital images. And R-Centipedes have several desirable features such as

1) structural flexibility which allows them to extract multiple objects in “one” slice image, 2) high

accuracy, 3) insensitivity with respect to initial positions and configurations of their contours, 4)

high computational efficiency capable of the parallel operation by using the explicit Euler

methods. The arithmetic processing using R-Centipedes on the computer is implemented in the

software, called “HawkC”. HawkC has been developed by Osaka University, Dynacom Co. Inc. and

Osaka Institute of Technology (OIT), with support from Japan Science and Technology Agency

(JST).You can find it on <http://hawkc.dynacom.co.jp/> page. HawkC is able to load images from

tomography data, extract contours from each of slice images, and construct 3D visual models by

the lamination of all their extracted contours. Therefore, we are currently working on the contour

extraction and the 3D visualization (reconstruction), using the actual bio-medical tomography

images obtained by electron microscope, MR Imager (MRI) and any other computed tomograph

(CT).

[1] Y.Kamakura, Y.Inoue, M.N.Shirazi: “R-centipede Model for Fast Contour Extraction in Electron Microscopic (EM) Tomography Image” (in Japanese), Medical Imaging and Information Sciences, Vol. 30, No. 4, pp. 95-100, 2013 (* Uchida Paper Award 2013). [2] M.N.Shirazi, Y.Kamakura: “Restructuring centipedes and their applications to fast extraction of structures in electron microscope tomography images”, Biomedical Engineering and Informatics (BMEI), 2010 3rd International Conference on, Vol.2, pp.518-523, 2010. [3] M.N.Shirazi, Y.Kamakura, “Parallel R-centipedes -Fast Contour Extraction for 3D Visualization”, Proc. GRAPP/IVAPP, pp.713-718, 2012.

KEYWORDS

Contour Extraction, Active Contours (Snakes), Tomography Images, 3D-visualization

-- 14 --


Color Image Processing Based On Human Visual System

Shiori Arii

Graduate School of Engineering, Information Engineering Course, Control System Engineering Lab., Tokyo City University


ABSTRACT

In this research, we propose a novel color image processing system based on the human visual

system. In human visual system, the brightness and chromaticity are processed independently.

Thus, in the proposed system, first, the color signal is divided into brightness and chromaticity.

Next, the brightness and chromaticity are processed in parallel. Arbitrary color image processing

methods can be applied to the proposed system. We show a concrete processing procedure

based on the constancy by using the proposed system. That is to say, the automatic white balance

which is simulated color constancy and the Retinex which is simulated brightness constancy are

performed in the proposed system. We make clear that high quality color enhancement images

can be obtained by the proposed system through the processing results.

KEYWORDS

Constancy, Brightness, Chromaticity, Automatic white balance, Retinex

-- 15 --


Signal Analysis Techniques for Brain-Computer Interface

Kazuki Kinjo

Graduate school of engineering, Biomedical Engineering Course, Bio-electronics Engineering Lab., Tokyo City University


ABSTRACT

Recently, a lot of researches and developments on Brain Computer Interface (BCI) which controls devices with brainwaves has been reported. Since brain waves are very feeble electrical signal, the signal was easily polluted by the noise when getting signal from scalp. To remove the noise, averaging is often used. However, the process requires reported imaging that gives much stresses to the user. In this research, we focused on a BCI system using μ rhythm that attracted attention in this field. In this report, a feature extraction technique, this technique is based on envelope calculation with brainwave and its derivative so that single-trial brain wave can be processed in real-time. From the result, the possibility of usability to detect μ rhythm is recognized. For the next step, I’m planning to try some analysis methods based on generation mechanism of brainwave, such like lyapunov analysis that can evaluate instability of signals.

KEYWORDS

BCI (Brain Computer interface), Brain wave, μrhythm,

-- 16 --


A Signal Conditioning Circuit for

Electroencephalogram-Based Brain-Computer Interface

Toshiki Shima

Graduate school of engineering, Biomedical Engineering Course, Bio-electronics Engineering Lab., Tokyo City University


ABSTRACT

BCI (Brain Computer Interface) attracts an attention as a method of non-verbal and non-motional

communication. Scalp EEG have been tried to apply to the easy-to-use BCI system because of

simple instrumentation and low invasiveness.

In this research, we focused on mu rhythm. Mu rhythm is observed in the frequency band of 7 ~

12Hz. The amplitude suppression on the motor cortex is induced by motor imaginary. This is

called the event-related desynchronization. This phenomenon can be used for motion detection

using EEG. The system using mu rhythm must overcome that it differs in amplitude and frequency

from person to person and from time to time. As a solution for the problem, we have developed a

novel system which adjusts the measurement condition especially, frequency band width,

automatically. The system composed with clock controlled filters and microprocessor which

evaluates signal quality and generates clocks for filters. In this report, we prepared a hardware and

evaluated it with time-varying signal. The result shows that the system operated correctly.

KEYWORDS

BCI (Brain Computer Interface), Mu rhythm, Clock controlled filter

-- 17 --


A Drowsiness Detection Method based on Distance and

Gradient Vectors

Sorn Sooksatra1, Toshiaki Kondo1 and Pished Bunnun2

1 School of Information, Computer, and Communication Technology Sirindhorn International Institute of Technology, Thammasat University

2 National Electronic and Computer Technology Center, National Science and Technology Development Agency.

E-mail: [email protected], [email protected], [email protected].

ABSTRACT

We present a drivers' drowsiness detection method based on visual features in a video sequence.

The proposed method comprises two modules; face detection and eye-state recognition. Face

detection is performed using the Haar cascade method. We determine the eye region in the facial

region first and find a dark circular object, i.e., the pupil in it. The pupil is located by means of the

normalized cross-correlation between distance and gradient vectors. The correlation coefficient is

maximized at the center of the dark circle. The cropped region around the eye center is then used

for eye-state recognition. The eye state, open or closed, can be recognized by evaluating the

variation of the correlation coefficient over time. The infrared LEDs are always used to illuminate

the face in bright, dim, and dark conditions. Experimental results show that the proposed method

constantly works well in the three lighting conditions. The computational speed of the method is

fast enough to perform at video rate.

KEYWORDS

Drowsiness detection, gradient vector, Eye detection, Face detection, Infrared LEDs.

mailto:[email protected]

-- 18 --


Real time Contact-free Heart Rate Measurement Using

a Webcam

Vasitphon Pawankiattikun and Toshiaki Kondo



ABSTRACT

There are many instruments for heart rate measurements such as electrocardiogram (ECG or

EKG), chest straps, and pulse oximeters. Since these devices are contact measurements, they may

make the users feel not only uncomfortable but also have some pains. We present a method for

a contact-free heart rate measurement on a video sequence using a webcam. The heart rate is

measured by detecting the prominent frequency of the skin-color change in a human face. As

color features in a video sequence, we utilize both green and hue signals. The frequencies of the

two color signals are analyzed in multiple observing times. We select statistically the most reliable

Fourier spectrum among all. The proposed method has been implemented using Simulink.

Experimental results show that it can perform heart rate measurement accurately in real time.

KEYWORDS

Heart rate, Webcam, Real time

-- 19 --


Unconscious Respiratory Signal Extraction by Cervical

Sound Analysis

Shun Kanai

Graduate School of Engineering, Biomedical Engineering, Bio-electronics Engineering Lab., Tokyo City University


ABSTRACT

Respiration is one of the vital sign used for the index in diagnoses such as sleep apnea syndrome

(SAS), pneumonia and heart failure. In this field, unconscious measurement is important for acute

diagnosis. Our goal is to propose the techniques for unconscious measurement of respiratory

signal. For our first trial, we performed the respiratory sound measurement from a neck and

analyzed it. The sound in breathing was obtained with the stethoscope on the neck which

connected a microphone. The result of fast Fourier transform (FFT) analysis shows that a

frequency band of the breathing was around 400Hz. We obtained respiration sound was

extracted with band pass filter having passband between 300 Hz and 500 Hz. Furthermore, we

succeeded in respiratory signal extraction by using a frequency filter and a ε-filter from the signal

polluted by background noise. However, it was also found that frequency component of voice and

swallowing sound were overlap with respiration. This means that new analyzing techniques to

reject voice and swallowing sound are essential. For the next step, we are planning to apply

wavelet analysis and to develop respiration detection technique and method to discriminate

inhalation and exhalation.

KEYWORDS

Respiration, Frequency analysis, Noise reduction, ε-filter

-- 20 --


Somatosensory and motor Evoked Potential

Measurements for Spinal Cord Injury Assessment

Kana Matsumoto

Faculty of Engineering, Department of Biomedical Engineering,

Bio-electronics Engineering Lab., Tokyo City University


ABSTRACT

Brain and peripheral nervous systems are connected each other with spinal cord. Spinal cord is

very important, however, it is very fragile tissue. If it is injured, motor function and sensory function

may not work well. Technology of spinal cord treatment is making progress day by day, however

current methods to examine injured spinal cord may not show quantitative result. In order to

obtain detailed information on spinal cord, we have focused on cortical somatosensory evoked

potential (CESP), which is a brainwave related with sensory pathway, and motor evoked potential

(MEP), which is an electric muscle activity related with motor pathway. My research goal is to

examine CSEP and MEP of rat which has injured spinal cord for 3 months. For the first step, I tried

to measure CSEP with normal rats. Typical CSEP waves were obtained. For the next step, I'll try

measurement with injured rat, MEP measurement and longer term measurement such like three

month.

KEYWORDS

CSEP, MEP, Spinal cord injury

-- 21 --


Topics in CET

Civil Engineering

-- 22 --


Experimental Comparative Study on Strength, Slump

and Heat Evolution of Concrete Containing Fly Ash and

Ground Granulated Blast Furnace Slag

Arosha Dabarera, Warangkana Saengsoy and Somnuk Tangtermsirikul

School of Civil Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University


ABSTRACT

Specifications for mass concrete construction mandate to use Supplementary Cementitious

Materials (SCMs) since it reduces heat generation. This study investigates the semi adiabatic

temperature rise of mass concrete samples incorporating SCMs which are fly ash and Ground

Granulated Blast furnace Slag (GGBS). The replacement levels for fly ash and GGBS are 30%-50%

and 50% - 75%, respectively. The experiments are conducted for water to binder ratio of 0.4, 0.5

and 0.6. Compressive strength tests are carried for 3, 7, 28 and 91 days to investigate the strength

development. Initial slump and slump loss are investigated as well. The semi adiabatic

temperature rise profiles indicated that the peak temperature is reduced when GGBS and fly ash

are used. However, fly ash is effective than GGBS since it significantly delays the time to attain

peak temperature and reduces the heating and cooling slopes in the temperature profiles. Initially,

the compressive strength is higher when GGBS is included although the slump significantly

reduces when compared to mixes with fly ash. However, strength gain rate of fly ash concrete

increases in long term than that of GGBS concrete. From these experimental processes, it is

concluded that fly ash is more effective in terms of the investigated properties compared to GGBS

in concrete. The study aims to compare the effectiveness of fly ash and GGBS when used in mass

concrete structures. The results are used for modification of existing model to predict temperature

rise in mass concrete and to verify existing strength and initial slump models.

KEYWORDS

Fly ash, GGBS, Semi adiabatic temperature

-- 23 --


Effect of Tapioca Starch on Fresh

Properties Concrete

Samita Chaikasatsin

School of Civil Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University


ABSTRACT

This project is aimed to be a preliminary study of using Tapioca Starch as a viscosity modifying

agent (VMA) in concrete work. Tapioca starch effects on the viscosity of concrete, which could be

investigated from the workability of corresponding mortar. Cement only mortars with water to

cement ratio (w/c) 0.25 to 0.48, superplasticizer dosage of 1% to 2.5%, starch concentration of 0%,

0.25% and 0.5%, was tested for workability. Mortar mixes that have equivalent workability (flow

diameter of 250 mm, and funnel flow time of 5 seconds) for each starch concentration were

identified and checked for concrete properties. Concrete were tested for initial workability,

workability loss, bleeding, setting times, and compressive strength. The results showed that all

concrete mixes provide same initial workability, however the mix with higher starch concentration

provides slower loss. Bleeding occurs when concrete has w/c more than 0.45. For setting times,

mix with higher starch concentration provide longer setting times (around 4 hours in this

experiment). Compressive strength of starch concretes which always have higher w/c, are lower

than that of cement only concrete as in this experiment initial workability were controlled to be

same.

KEYWORDS

Viscosity Modifying Agent (VMA), Self-leveling concrete, Self-compacting concrete(SCC)

-- 24 --


Construction of the Recycling System of the Concrete by

Acid Dissolution

Tomohiko Ogawa

Graduate School of Engineering, Department of Urban and Civil Engineering, Tokyo City University


ABSTRACT

Purpose of this study is to build out a concrete recycling system by using acid solution. In this

study, the optimum acid solutions for dissolving mortar were investigated at first. From results,

formic acid solution determined as the optimum acid solution for dissolving concrete. Then,

Manufacture of recycled fine and coarse aggregate from concrete was tried. The quality of

manufactured fine aggregate and coarse aggregate were in range of H standard of JIS. Also, the

constituent separation test of calcium from acid solution after dissolution was carried out.

KEYWORDS

Recycling system of scrap concrete, Comical processing

-- 25 --


Observation of a crack blockade of Strain Hardening

Cementitious Composites by Self-healing

Kazuki Watanabe



ABSTRACT

SHCC (Strain Hardening Cementitious Composites) is the special which occurs plural fine cracks by

external force. In this study SHCC was focused and fine crack blockade process in SHCC with

water binder ratio (W/B) of 40, 45 and 50% after water curing, was observed. In consequence, the

fine crack was closed after 3 days water curing.

KEYWORDS

Strain Hardening cementitious composites, Crack blockade

-- 26 --


Study on BIM Utilization for Design Improvement of

Infrastructure Project

Yuya Sajima

School of Engineering, Department of Urban and Civil Engineering, Tokyo City University E-mail: [email protected]

ABSTRACT

BIM technology is power to realize the virtual construction and information sharing among

phases. If we use BIM design process, the cost for the design increase somehow but the impact

for total cost reduction is larger than the cost increase in designing.

CALS/EC is defined as “Continuous Acquisition, Lifecycle Support and Electronic Commerce” and used as the word expressing a series of activities to innovate construction projects by using the

technologies of networking, electronic data and data sharing in Japan and Korea.

Virtual construction could be done by using Building Information Modelling technology. But, to do

that, information and knowledge on construction phase or fabrication phase should be available

in design stage. In Japan, MLIT had been taking the leadership in the CALS/EC project which was

just partially successful. We have to learn from “the experiences of CALS/EC” to get the fruit from BIM introduction to infrastructure projects. In the case of design-bid-build contract, since data

sharing should be restricted based on the contract, consultants or engineers for designing are to

become more capable of utilizing information relevant to construction of fabrication. The mobility

of personnel is to be promoted in construction industry. In the case of design-bid-build contract,

since data sharing should be restricted based on the contract, public sectors have to be more

positive overcome contract related issues with their own leadership. If public sectors in Japan

would not notice the similarity of issues of CALS/EC and BIM, Japanese construction industry may

experience the same kind of frustration as one they had while executing CALS/EC projects.

KEYWORDS

BIM technology, Continuous Acquisition, Lifecycle support and electronic commerce

-- 27 --


Experimental study of Structural Health Monitoring

Sho Nozaka


ABSTRACT

A resurgence of attention to and interest in system identification techniques has recently been

observed among engineers in the field of structural engineering in conjunction with the

rehabilitation of existing structures possibly damaged by past earthquakes and other loads. The

load resisting capacity of these structures may also degraded due to aging. As a structure

deteriorates or approaches its design life, the existing condition may be quite different from that

of the original system. In this regard, the field of system identification has special significance in

the connection with the asset management of the existing structure.

In this presentation talk to about the basic experimental study to detect the damage of a steel

frame structures by vibration tests.

KEYWORDS

Health monitoring of existing structure, Damage detection, Bridge maintenance

-- 28 --


Detection of Fatigue Crack in Weld Bead

Using the Eddy Current Flaw Detection

Shingo Sekimoto


ABSTRACT

Most of the civil infrastructures constructed in the 1960s will be deteriorated in the near future. The

maintenance works for those infrastructures are very important. Among those works, detection of

fatigue crack is very important.

This study focuses on the applicability of the eddy current test of non-contact and quick

inspection. The application of the eddy current technique has not been found in the field of civil

steel structures. The complicated geometry such as connections and limited area of accessibility

make it difficult to scan probe. The influence of noise by lift off is one of the disadvantages of the

eddy current technique for the practical use on site. This study examines the applicability of cross

point probe. The probe has been improved for the noise of lift off, comparing with the

conventional eddy current probes.

Figure

Fig.１ Eddy Current Flaw Detector Fig.2 Figure2: fatigue crack

KEYWORDS

Fatigue crack, Inspection, Eddy current technique,

-- 29 --


Inspection, Evaluation, and Repair guidelines in practice

for steel building in Thailand

Warakorn Tantrapongsaton and Taweep Chaisomphob

School of Civil Engineering Sirindhorn International Institute of Technology, Thammasat University


ABSTRACT

This study focuses about Inspection, Evaluation, and Repair for steel building in practice. Since

steel was used as a material for building more than two centuries; it has been popular for steel

construction industry, in particular bridge structure and buildings Nowadays, steel building that

were constructed in the past are deteriorating over time, makes the structural performance of

these buildings and bridges to decreased and cause some risks of using that structure. Therefore,

Inspection, Evaluation, and Repair will be an important procedure to maintain the structure’s performances to be on the same level as it was constructed and extend its service life instead of

destroy and rebuild. In this study, the standard from five countries including United State of

America (AISC, AWS, ASTM), Japan (JIS, JAS), Australia & New Zealand (AS/NZS), England (BS EN),

and Canada (CSA) were reviewed and compared, to make a guideline of Inspection, Evaluation

and Repair for steel structure building in practice. Results indicated that the Inspection of a steel

structure are sub-divided into two main focus areas which are Steel Connection and Steel Surface

Inspections since these two areas were considered to be the weak point of a steel structures

because weak steel connections can cause the structure failure and expose steel surfaces can

cause the steel element to be corrode. Evaluation and Repair will be divided into several methods

according to the inspection areas. Thus, guideline of Inspection, Evaluation and Repair for steel

structure building in practice can be used especially in Thailand, to ensure the quality of a steel

building, prevent a structural failure that could occur in the future, and extend the usage of the

existing building by applying maintenance and repair methods for steel structures.

KEYWORDS

Inspection, Evaluation, Repair, Steel, Structure, Building

-- 30 --


Investigation of Effective Elastic Properties

of Frame-Like Periodic Cellular Solids

by Strain-Energy-Based Homogenization

Kasem Theerakittayakorn and Pruettha Nanakorn

School of Civil Engineering and Technology Sirindhorn International Institute of Technology, Thammasat University


ABSTRACT

Periodic cellular solids are used in various applications. When periodic cellular solids are used as

load-bearing structures, the effective elastic properties of periodic cellular solids are of significant

interest, and are among the main considerations of cellular solid design. The desired effective

elastic properties of a periodic cellular solid can be obtained by appropriate selection of the base

material and the topology of its unit cell. Homogenization methods can be used to calculate the

effective elastic properties of a periodic cellular solid from its unit-cell structure and the finite

element method can be used to analyze the unit cell. Many periodic cellular solids are frame-like

structures. For such periodic cellular solids, beam elements can be used to accurately model their

struts. In this study, the exact forms of the effective elastic constants of arbitrary frame-like

periodic cellular solids that can be modelled accurately by Euler beams are analytically derived by

using the homogenization method based on equivalent strain energy. The exact forms are

obtained in terms of some dimensionless factors, the characteristic length and volume of the unit

cell, the area and moment of inertia of the struts, and Young’s modulus of the base material. In general, the dimensionless factors can be functions of the area and moment of inertia of the

struts. However, in many practical cases, these factors are constant. When the dimensionless

factors are constant, they can be determined by exact curve fitting using finite element results with

different areas and moments of inertia of the struts. In these cases, the closed-form solutions of

the effective elastic constants will be obtained from exact curve fitting. By using the closed-form

effective elastic constants obtained from exact curve fitting, mechanical characteristics of periodic

cellular solids with various unit-cell topologies can be determined. This allows advantages and

disadvantages of different unit-cell topologies to be studied. The obtained closed-form solutions

also allow the effect of strut sectional properties on the effective elastic constants to be thoroughly

investigated. In summary, by using the obtained closed-form effective elastic constants, unit-cell

topologies and strut sectional properties can be appropriately chosen to suit different applications.

KEYWORDS

Periodic cellular solid, Homogenization, Effective elastic property, Exact form

-- 31 --


Finite Element Analysis on Soil Nail Layout for

improvement of Slope Stability

Yosuke Watarida



ABSTRACT

This study discusses, the influence of layout and interval of the soil nailing, which is one of the

slope protection methods on the slope stability. Since 73% of land area consists of mountains

terrain, landslide disasters frequently occur in Japan. Thus instability slopes has been protected

using some slope protection method in order to decrease landslide disasters. Above all, soil

nailing is the one of the most effective methods for slope stability. Because the mechanism of

slope stability using the soil nailing was not clear, the influence of layout and interval of soil nailing

on slope stability was investigated using Finite Element Method in this study.

The numerical modelling of slope stability with the soil nailing was performed using PLAXIS 3D

2013 software which is based on FEM. In this study, the condition of the centrifuge model test by

Soeda (2015) adopted as FE analysis. Figure 1 shows the model of analysis and the FEM mesh.

Three different layouts such as square, alternating and rectangle were modeled for the analysis. The analysis was performed in 11 cases where the layouts and intervals of the modelling were set in different conditions. Also, the deformation and the safety factors in each case were compared and analyzed.

As a result, it was confirmed that the deformation decreased and the safety factor increased according as the number of soil nailing increased in all three layouts. In addition, it was cleared that the deformation in alternating layout was smaller than other square and rectangle layouts.

KEYWORDS

Soil nailing, Slope stability

Fig.1 Analyzed model and FEM mesh

14.0ｍ

9.6ｍ

2.0ｍ

25.0ｍ

5.0ｍ

50°

Sliding Layer

Immobile

Layer

Soil Nailing & Bearing Plate

-- 32 --


Experiment of Anchor Drawing for Prevention of Crash

Disaster from Slope

Shoichi Okaniwa



ABSTRACT

Japan is certainly prone to cause natural disasters such as earthquakes, floods and landslides due

to heavy rain caused by typhoons, and volcanic eruption, etc. Various kinds of slope works such as

shotcrete, slope protection, slope nailing, and others are carried out to protect social infrastructure

and dwellings from slope disasters. It is important to protect the safety of workers while engaging

in these slope works. Lifelines and safety belts are used to prevent them from falling accidents. A

number of standard lifeline holding methods are widely used and reported, but their engineering

rationale is unclear. In this study, in order to verify the effectiveness of lifeline mechanism, a series

of pull out tests were carried out, Diameters, embedded depths, and shapes of anchor used for

holding a lifeline were considered and the behavior of the anchor and associated soil deformation

were analyzed using Particle Image Velocimetry (PIV). Fig. 1 shows experimental setup. The

container was a steel semi-cylindrical tank of 500 mm in diameter and 500 mm in height. The

anchor was a semi-cylindrical anchor of 19mm in diameter and 300 mm in height. In the test, the

anchor was pulled out using a jack with a speed of 0.2 mm/sec. Fig. 2 shows the image of PIV test

result at the time of maximum load. The distribution of ground displacement was obtained using

the image correlation method. In Fig. 2, red area of the image indicates the range where

individual elevation points of the ground were displaced by around 0.56 mm. As seen from the

wedge-shaped distribution in the image, it was found out that the ground deformation caused by

pulling out the anchor occurred intensively in the ground in close contact with the anchor tip.

Fig. 1 Fig. 2

KEYWORDS

Anchor drawing, Slope crash

Camera

Jack

Load cell

Half-cracking anchor

-- 33 --


Optimal Arrangement of Observation Points

based on Value of Information

Yosuke Tasaki


ABSTRACT

New sampling (observation) information reduces the variance of parameters, however,

quantification of reduction in variance is not enough to answer the question whether the new

sampling should be performed or not. To answer the question, we need to estimate the worth of

the information content in data, i.e., the value of information. In this paper, we seek an efficient

method based on the Value of Information (VoI) to answer where additional sampling points

should be placed and how many sampling should be collected in a Gaussian random field.

The proposed method is applied to additional boring placement for liquefaction countermeasure

on embankment along a river. An optimal set of sites for additional boring are evaluated as a

solution of optimization problem by Particle Swarm Optimization. Figure 1 shows the obtained

optimal set of boring sites when the number of additional boring is six. The probabilities of

implementation of countermeasure are also obtained as shown in the figure, because information

obtained in future is taken into account. Optimal sampling placement may be obtained with a

feasible computational cost, even when the number of additional sampling points is more than 10.

Optimal number of sampling is also evaluated from total cost, i.e., sum of observation cost and Vo

KEYWORDS

Value of information, Random field, Optimal sampling points

Figure 1. Locations of additional six boring and distributions of related parameters

Mean of estimated PL and threshold for decision after new boring is considered (post) xc,

probabilities of implementation of liquefaction countermeasure (P.of C.)

-- 34 --


Numerical Analysis of Relation Between A Index of

Seawater Exchange: Age and Forming Hypoxia in ISE-

Bay, Japan

Kasumi Ikeda



ABSTRACT

Hypoxia often occurs in a semi-enclosed bay, because it is difficult to exchange water. Age is one

of indexes of seawater exchange. The age of a water parcel is the time elapsed since it entered

the domain. Because the momentary outputs of age are easy, it is effective in time analysis. The

purpose of this study is to investigate the relation between hypoxia and age in Ise-Bay, Japan.

Results are as follows. (1) Age of river water decrease when high discharge. It has a small influence

on age of seawater. (2) Age of seawater and dissolved oxygen are negative proportion relations.

Days of forming hypoxia are lower than average age in middle and bottom layer. Therefore it is

easy to become the hypoxia in bottom layer.

KEYWORDS

Hypoxia phenomena, Sea water exchange, Age of water

-- 35 --


Energy Dissipation Models for Computing Statistical-

based and Spectral-based Root-Mean-Square Wave

Heights

Nga Thanh Duong*,a, Winyu Rattanapitikona and Tawatchai Tingsanchalib

a Civil Engineering Program, Sirindhorn International Institute of Technology, Thammasat

University, Thailand b Asian Institute of Technology, Pathum Thani, Thailand

Email: [email protected]

ABSTRACT

The energy dissipation due to wave breaking is an essential requirement for computing the

transformation of root-mean-square ( rms ) wave height in the surf zone. The rms wave height

can be classified according to its definition based to be statistical-based rms wave height (

rmsWH ) and spectral-based rms wave height ( rmsEH ). These two definitions of rms wave

height are usually assumed to be equal. However, it was shown by many researchers that the

rms wave heights derived from the two definitions are significantly different. No literature has

described clearly the applicability of existing energy dissipation models in simulating rmsWH and

rmsEH . Therefore, the main purpose of this study is to recalibrate and examine the applicability

of ten existing models in simulating the transformation of rmsWH and rmsEH , and identifying the

suitable ones. A wide range of experimental data was collected for calibration and examination

of the models. The examination shows that the default coefficients in all models are not the

optimal values for computing both of rmsWH and rmsEH . The optimal coefficients for computing

rmsWH are different from those for computing rmsEH . The top four models with optimal

coefficients for computing rmsWH and rmsEH are recommended to be used.

KEYWORDS

Energy dissipation, parametric wave model, root-mean-square wave height

-- 36 --


Municipal Solid Waste Management and Application of Serial-

Self Turning Reactors (STRs) Technology for local government

Taweep Chaisomphob and Chutimon Somboonmark

Advanced and Sustainable Environmental Engineering, TAIST-Tokyo Tech Sirindhorn International Institute of Technology, Thammasat University


ABSTRACT

The increasing of municipal solid and unsuitable waste disposal such as open dumped, open

burning sites, and incinerators without air pollution control systems waste cause the environmental

problem. Suratthani Province is in the fifth ranking of provinces facing with the waste

management crisis. This study was focused on the municipal solid waste management of two

different communities use the community-based MSW management by public participation. For

urbanized community, khuntalae sub-district municipality and thachi by investigate the waste

generation rate and evaluates the MSW produced by khuntalae sub-district municipality,

Suratthani Province in order to study the feasibility for use the composting technology “Serial-Self

Turning Reactors (STRs)” by characterize the putrescible MSW that are useful for composting.

Organic waste such as municipal waste, crop residues, agricultural waste and food waste

contained large reserved of nutrients. For rural community, Thachi sub-district municipality and

have large amount of horticulture waste such as the fruit peels and palm plantation residues that

can be used as a feedstock for composting technology The composting technology is the option

for processing the large quantities of biodegradable solid waste, can reduce the volume of wastes

disposed, source separation of materials should be used as a feedstock. The product quality in

form of composed organic fertilizer from MSW that public acceptance. The STR technology has

been applied with canteen waste, market waste, fruit peels, food waste, vegetable waste, sewage

sludge and the chicken manure. Odor controllable, faster throughput, lower labor costs, smaller

area requirements and the detention time for STRs composting just 2 weeks. This research study

the composite materials of horticulture wastes with fruit peels, food waste and palm plantation

residues as co-composting by lab-scale and large scale experiments.

KEYWORDS

Municipal Solid Waste, Composting, Organic waste, STRs Technology

-- 37 --


Co-composting of Municipal Solid Waste (MSW) with Chicken Manure by using ‘Serial Self-Turning Reactor’

(STR) System

Linh Hoang Tran and Taweep Chaisomphob

School of Civil Engineering Sirindhorn International Institute of Technology Thammasat University


ABSTRACT

The purpose of this study is to characterize the effect of different proportions of chicken manure

(CM), municipal solid waste (MSW), rice husk (RH) and recycled compost (RC) at an aeration rate

of 0.5 l/min/kg organic matter. The so-called STR (Serial self-turning Reactor) system was adopted

in this study. STR consists of reactors, STR tower, BioMy-Box and air system. The core of this

advanced technology is to use the self-turning unit (BioMy-Box) which is based on the concrete

mixing unit. This mixing mechanism uses the flows of materials by gravity without any electrical

energy supply. Two large-scale mixtures were prepared with a 1:0.5:0.5:0.25 and 1:0.5:0.5:0.5 ratio

of CM, MSW, RH, and RC in dry matter, respectively. The temperature was recorded every 5

minutes by thermo-copper and data logger with a resolution of 0.10C in each reactor. The

research was carried out during 28 days, including two phases: composting process (14 days) and

curing (14 days). During composting the composting mixtures were turned once on day 7. The

final compost products then were analyzed to determine the physicochemical properties. From

the two large-scale experiments, composting efficiency and final compost quality were evaluated.

KEYWORDS

STR system; chicken manure; MSW; rice husk; recycled compost

-- 38 --


Development of Tama Den-en-toshi

Satoshi Tanaka



ABSTRACT

The economy of developing countries in Asia is growing at unprecedented speed. The housing

supply in large cities has become a serious issue. Furthermore, motorization rates are increasing

dramatically in developing countries. For example, the motorization rates in China, India and

Indonesia have annually increased over 20%. Consequently, traffic jams are becoming more

severe daily.

Tokyo’s population has also increased dramatically; however, it has an exemplary urban structure, which can be evidenced by the development of its suburban regions with sufficient public

transportation and environmental awareness that has successfully dealt with the problems

mentioned above. I’d like to discuss the details of Tama-Den-En-Toshi (developed by the Tokyu

Corporation), which is well-known for its exemplary railways and housing development.

Currently this region is considered to be an excellent development in suburban Tokyo.

Additionally, Tokyo’s rate of railway transport for commuting is over 50%. In this area, the rate is

over65%; thus, it can be said that this area became a transit-oriented development residential

area.

KEYWORDS

Urban planning and development, Railway transportation, Transit-oriented development

-- 39 --


Ranking of Hazardous Highway Locations in Thailand

Ponjanat Ubolchay and Mongkut Piantanakulchai



ABSTRACT

This study presents a technique to rank hazardous highway locations in Thailand by using

available statistical data from the Department of Highways (DOH). Accident rate, death rate, and

injury rate are calculated per length of highway and traffic volume. Two methods of ranking are

applied in this study, weights given by DOH and weights derived from Principal Component

Analysis (PCA). The results of study reveal hazardous highway locations in Thailand in two levels,

district level and specific highway sections. Surprisingly, the results show that both methods give

similar ranking results. The method of PCA provides an alternative ranking scheme which does not

require subjective judgment of weights. The study suggests hazardous highway locations/areas

where further investigations should be carried out by related authorities.

KEYWORDS

Hazardous Highways, Ranking, Principal Component Analysis (PCA)

-- 40 --


Travel Time Estimation Based on Fused Traffic State

Data: Case Studies in US and South Korea

Soknath Mil and Mongkut Piantanakulchai



ABSTRACT

The goal of Advance Traveler Information System (ATIS) is to improve traffic flow and safety by

providing up-to-date information of traffic network. In this paper, traffic information (travel time)

estimation based on fused traffic state data is presented. A centralized architecture is used to fuse

the traffic sate data from different sensors based fusion by averaging and fusion by median and to

estimate the travel time based on the simultaneous travel time estimation model accordingly. Two

case studies are selected to investigate the performance of fusion models based on freeway data

in USA and the arterial road data in South Korea. The results show that the fusion by median

performs best. The model is able to eliminate outliers in the data with less effort of complex

mathematical process. It can be used as a benchmark for comparison with other advanced fusion

models.

KEYWORDS

ATIS, Centralized architecture, Travel time estimation, Data fusion

-- 41 --


A Study on Traffic State Patterns in Urban Area:

A Case Study of Bangkok, Thailand Kimheang Ly*, Mongkut Piantanakulchai* and Sornthep Vannarat**

*School of Civil Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University

E-mail: [email protected], [email protected] ** Large Scale Simulation Research Laboratory, National Electronics and Computer

Technology Center (NECTEC) E-mail: [email protected]

ABSTRACT

This study attempted to investigate traffic state patterns in an urban area by using the data from

web-based mapping services. One month traffic state data of the road network in Bangkok were

collected. In order to perform the area-based analysis, the data was organized into grid of cells

with uniform size. Statistical features of each cell were calculated to find patterns of traffic states.

As the result, the traffic patterns of the whole urban area were presented. Diurnal traffic state

patterns by different days and different locations of the urban area were also discussed. Finally,

the concentric patterns of traffic state in Bangkok was revealed and found to be consistent with

previous studies.

KEYWORDS

Area based analysis, Traffic state patterns, Urban traffic

abstract book of siit-tcu seminar 2015 · siit-tcu seminar 2015 program monday october 19, 2015...

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