Abstract Proceedings of IEEE SCAP 2013

The 2013 IEEE Student Conference on Senior Capstone Project

IEEE SCAP 2013
Faculty of Engineering
Chulalongkorn University
Bangkok, Thailand
March 29, 2013

Organizing committee

Advisory Committees
Boonsom Lerdhirunwong
David Banjerdpongchai
Boonchai Sowanwanichakul
Parames Chutima
Witaya Wannasuphoprasit
Ekachai Leelarasmee
Arthon Sinsawasdi

General Chair
Thavatchai Tayjasanant

Technical Program Chairs
Panuwat Janpugdee
Peerapon Vateekul

Technical Program Committees
Chaodit Aswakul
Nakornthip Prompoon
Pizzanu Kanongchaiyos
Kuntinee Maneeratana
Angkee Sripakagorn
Boonchuay Supmonchai
Arporn Teeramongkonrasmee
Charnchai Pluempitiwiriyawej
Haruetai Lohasiriwat
Wipawee Tharmmaphornphilas

Local Arrangement Chair
Jitkomut Songsiri

Secretary
Amornrat Noicharoen

Webmaster
Apinun Intarachaiya

ii

Keynote speakers

Title : “Scientists investigate what already is. Engineers create what has never been”
Ekachai Leelarasmee, Chulalongkorn University

Abstracts
Engineering is a field which applies scientific knowledge to solve real world problems or
designing products. This talk is meant to inspire young engineers by showing a video clip
―IEEE: Engineer Inspiring‖ as well as introducing some creative projects from
www.kickstarter.com such as Pebble Watch, 3D Printer, Hidden Speaker and iOS controlled
camera. Then two development projects done at the Embedded System and Integrated Circuit
Design Laboratory (ESID) at Chulalongkorn University will be described. They are Smart
Meter and Remote Solar Farm Monitoring. These two projects demonstrate how electronics
engineers apply their electrical knowledge to help the country fighting the energy problem.

Biography
Ekachai Leelarasmee finished his undergraduate study in electrical engineering from
Chulalongkorn University in 1974 and went on to do his Ph.D at University of California,
Berkeley USA in 1982. He is now an associate professor and deputy chair of student
activities in the Department of Electrical Engineering, Chulalongkorn University. He was the
IEEE Thailand Section Chair in 2010-11 and is the interim chair of the IEEE Thailand Solid
State Circuit Chapter 2013.

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Table of Contents
Organizing Committees ......................................................................................................... ii
Keynote Speakers................................................................................................................. iii
Section 1 Sustainable Technology
Remote Agricultural Data Management System for Royal Project Foundation .............................................. 2
Tuchchai Apinuntakulchai, Apinya Phanumphai, Surapont Toomnark, Thagorn Tangmankhong,
Kraikron Settakraikun (King Mongkut's University of Technology Thonburi)
Online shopping mall ................................................................................................................................... 3
Parita Doungngam, Chachanok Somchit, Artit maneesri, Sirapat Chiewchanwattana
(Khon Kaen University)
Comparison of indoor SLAM using ceiling images with different state representations ................................. 4
Piyapat Saranrittichai, Nattee Niparnan, Attawith Sudsang (Chulalongkorn University)
Fabrication of Micropore on Silicon substrate............................................................................................... 5
Krairat Mairin, Mana Sriyudthsak (Chulalongkorn University)
Development of an Embedded BLDC motor controller using RS485 standard ............................................... 6
Teeratath Ariyachartphadungkit, Kanjanapan Sukvichai (Kasetsart University)
An AU Golf Car: Autonomous Parking System ............................................................................................ 7
Hemmawat Yensuong, Patompong Sulsaksakul, Passaporn Rattanasetyith, Pattanan Detkrut, Pasawat
Laokhonkha, Narong Aphiratsakun (Assumption University)
Improved Material Removal Rate by Abrasive Water Jet Milling .................................................................. 8
Kasidet Wangvithayakul, Ukrit Jampachon, and Sataphol Wattnapornmongkol, Pairat Tangpornprasert
(Chulalongkorn University)

Section 2 Science and Technology
Disruptions to Saccade Planning: Effects on Eye Movements ..................................................................... 10
YueYinglong, Yen Shih-Cheng, Chua fook kee, Shih-Cheng (National University of Singapore)
Parallel Additive Implementation for modified Flexible Interval Representation System ............................. 11
Phoonlarp Mekraksakit, Thanisorn Thanapongsapak, Chawin Wongchindakhun, Athasit Surarerks
A Quadrature Current Controlled Oscillator with 250 – 700 MHz Tuning Range ........................................ 12
Radit Smunyahirun, Ekachai Leelarasmee (Chulalongkorn University)
Real Time People Tracking and Collision Avoidance using Sensors Fusion for an Indoor Omni-directional
Wheels Mobile Robot ................................................................................................................................ 13
Bhirawich Pholpoke, Kanjanapan Sukvichai (Kasetsart University)
Design of a Phasor Measurement Unit (PMU) using FPGA ........................................................................ 14
Porjed Sakunjareanpornchai, Thirawut Fueangfu (King Mongkut's University of Technology Thonburi)
Fire Infiltrating Robot with Image Acquisition: A Microcontroller based Urban Search and Rescue
(USAR) Robot .......................................................................................................................................... 15
Ruth A. Silvallana, Russel L. Amado, Kristoni R. Aquino, Carmen Fe C. de Guzman, Moreno,
Kendrick Kent L. (Technological Institute of the Philippines)
A New Algebraically Simple Chaotic Jerk Circuit and System using Memristor Nonlinearity..................... 16
Jirayu Peetakul, Sawitee Wangthawal, Wimol Sanum (ThaiNichi Institute of Technology)
An AU Golf Car: Obstacles Avoidance System .......................................................................................... 17
Ankur Agrawal, Krittamate Jirundorn, Tidarat Punyachai, and Samuel Hussain Mogakolodi,
Narong Aphiratsakun (Assumption University)
Stability Control of a Self-Driving Bicycle ................................................................................................. 18
Vittavat Kaewmaneekul, Sompong Jarujitjumlern, Whicha Thaitavon, Viboon Sangveraphunsiri
Investigating on Damping Property of Laminated Composite Materials ...................................................... 19
Thanyarat Singhanart, Kritsadaporn Thongsawang, Nattapon Kaewchalam, Nutthasan Srikwanma,
Worapol Phraechinda (Chulalongkorn University)

Section 3 Health and Medicine
Design of an appointment system and bed management for Chemotherapy department ............................... 21
Thanakrit Thanathipanont, Achiraya Eurakarawong, Wipawee Tharmmaphornphilas
Individual Speech Synthesis for ChulaDAISY ............................................................................................ 22

iv

Sivaporn Homvanish, Thiti Watansrimongkol, Natchanon Phachongkitphiphat, Proadpran
P.Punyabukkana, Atiwong Suchato (Chulalongkorn University)
Real-Time Gait Analysis Using Kinect-based Motion Capture System ........................................................ 23
Pattaravut Maleehuan, Pizzanu Kanongchaiyos (Chulalongkorn University)
Gait Phase Detection using Wireless Smart Shoe with Optimized Threshold by Genetic Algorithm ............ 24
Nantawat Pinkam, Itthisek Nilkhamhang (Thammasat University)
Ultrasound B-scans Image Denoising via Expectation Maximization-based Unsharp Masking ................... 25
Theerawit Wilaiprasitporn, Chedsada Chinrungrueng, Widhyakorn Asdornwised
An Automatic System for Measuring Electrode-Skin Impedance ................................................................ 26
Prawsiri Veeranarapanich, Arporn Teeramongkonramee, Apiwat Lek-uthai (Chulalongkorn University)
Computer Application using ARIMA and Simulation techniques for managing inventory in hospital .......... 27
Pattranit Khobkun, Watsa Tantiyuth, Wassachon Veerakul, Surapong Sirikulvadhana
Admission and Discharge Processes Improvement...................................................................................... 28
Nopparuth lurkittikul, Tanawut Supparerkapa, Tanawat Jarusiripipat, Wipawee Tharmmaphornphilas
Design and Manufacture Argumentative Mobility Device For Osteoarthritis patients in Thailand ................ 29
Vorapraj Chutintaranond, Wongsatorn Sathitsuksanoh, Pitchaya Sovachinda, Teerinth Changsawang,
Pairat Tangpornprasert, Chanyaphan Virulsri (Chulalongkorn University)
Second Ear: A Hearing Tool for People with Hearing Disability ................................................................. 30
Pattara Sukprasert, Nuttapong Phaisarn, Atiwong Suchato, Proadpran Punyabukkana
Design and Implementation of Surveillance Robot for Disabilities and Elderly ........................................... 31
Surainan Kahmimah, Jakapan Suaboot, Apichat Heednacram (Prince of Songkla University)
Learning Causal Structures of Brain Connectivity in fMRI time series ........................................................ 32
Arnan Pongrattanakul, Puttichai Lertkultanon, Jitkomut Songsiri (Chulalongkorn University)
Patient and treatment scheduling in Dermatological Outpatient Department queuing system ....................... 33
Hataipat Juthasri, Suwat Tansiriyakul, Oran Kittithreerapronchai (Chulalongkorn University)

Section 4 Network and Communications
An Alarm System via Social Network Services .......................................................................................... 35
Theeradet Khamperawat, Gorarit Chandhanimi, Korporn Panyim (Mahidol University)
An Improvement of 3G Network Coverage with Picocell in Mahidol University ......................................... 36
Sanhapit Phatratipakorn, Thanate Srieakpanit, Korporn Panyim (Mahidol University)
Performance Improvement of Wi-Fi Network in Faculty of Engineering, Chulalongkorn University ........... 37
Nipoon Sintoowong, Nonthawat Ungtrakul, Thanach Chotruangprasert, Chaodit Aswakul,
Chaya Limchitti (Chulalongkorn University)
Microwave Sensor with Artificial Neural Network Application .................................................................. 38
Narong Borijindargoon, Nuttapon Muangmor, Chuwong Phongcharoenpanich, Sorawat Chivapreecha
(King Mongkut's Institute of Technology Ladkrabang)
Development of Radio Resource Planning Program for 2G and 3G ............................................................. 39
Jiradchaya Kanjanakunchorn, Jidapa Hansawangkit, Pongsatorn Sedtheetorn (Mahidol University)
Communication Emulation using DMSL/COSEM on PC............................................................................ 40
Raivin Srisamrit, Wanchalerm Pora (Chulalongkorn University)
Service Quality Improvement in Telecommunication Service Encounter ..................................................... 41
Konlawat Luengrat, Kritsana Settapittayakul, Natcha Thawesaengskulthai (Chulalongkorn University)
Target Location Searching Application using Ad-hoc Network ................................................................... 42
Kornkanok Khaoampai, Kamonluk Suksen, Kultida Rojviboonchai (Chulalongkorn University)
Traffic sensing application using ad-hoc network ....................................................................................... 43
Korakot Sirinam, Krittin Intharawijitr, Kultida Rojviboonchai (Chulalongkorn University)
A Centralized Online Network-based Intrusion Prevention System Control via Web Application ................ 44
Ekgapark Wonghirunsombat , Teewalee Asawaniwed, Vassapon Hanchana, Naruemon
Wattanapongsakorn (King Mongkut‘s University of Technology Thonburi)
Voice On Demand Application over Ad-hoc Network ................................................................................ 45
Jittapon Busarakum, Kultida Rojviboonchai (Chulalongkorn University)
A Study on Chaos in Digital Filter and Its Application to Secure Communication ....................................... 46
RattaponThassanasateankit, WittayaJantaramatsakarn, WisarutPhompung, SorawatChivapreecha
(King Mongkut's Institute of Technology Ladkrabang)

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Section 5 Computer and Information Technology
Data Partitioning to Improve Similarity Join by Prefix Filtering Algorithm ................................................. 48
Methus Bhirakit, Jaruloj Chongstitvatana (Chulalongkom University)
Automatic Screening Angle-Closure Glaucoma using Genetic Algorithm and Genetic Kernel SVM ........... 49
Paopat Ratpunpairoj, Waree Kongprawechnon, Pished Bunnun, Toshiaki Kondo (Thammasat University)
Application of Combinatorial Optimization with Coincidence Algorithm for Flow shop Scheduling
problem ..................................................................................................................................................... 50
Ornrumpha Srimongkolkul, Prabhas Chongstitvatana (Chulalongkorn University)
3D Game Framework for Android Platform................................................................................................ 51
Wirune Kaewjai, Thiti Rungcharoenpaisal (Dhurakij Pundit University)
Development of Ground Planar Segmentation algorithm using 3D Point Clouds Information from
Kenect Depth Image Camera...................................................................................................................... 52
Thanarat Chaveekolakit, Kanjanapan Sukvichai (Kasetsart University)
Adaptive strategic decision point extraction from Influence maps in games ................................................. 53
Namo Podee, Vishnu Kotrajaras, Boonserm Kijsirikul (Chulalongkorn University)
Tower Defence Game Project ..................................................................................................................... 54
Nattapong Rattasamut, Weerapong Siriyindee, Natasha Dejdumrong
(King Mongkut's University of Technology Thonburi)
Application for Publicity of promotional products online. ........................................................................... 55
Natthaporn Singmanee, Chadaporn Chiansri, Sirapat Chiewchanwattana (Khon Kaen University)
Study on a National SMS HUB Solution for Bulk SMS and National Policies on SMS Regulator in
Sri Lanka ................................................................................................................................................... 56
M.W. P. Maduranga , M. Gamage, Manodha Gamage (Asian Institute of Technology)
Indoor Environment 3D-Image Reconstruction using Microsoft Kinect for Rescue Robot ........................... 57
Piyaphat Phukphan, Vasitphon Pawankiattikun, Toshiaki Kondo, Itthisek Nilkhamhang
(Thammasat University)
Multiple-CCTV monitoring system for iOS-based mobile device ................................................................ 58
Rakneung Pichitwitaya-ake, Supavadee Aramvith (Chulalongkorn University)
Development of a real-time object tracking camera..................................................................................... 59
Krittin Pachtrachai, Toshiaki Kondo, Toshiaki Kondo (Thammasat University)
Development of Unification Filesystem for Cloud Storage.......................................................................... 60
Worachate Apichanukul, Thanawat Suknim, Krerk Piromsopa (Chulalongkorn University)
Personalized Assessment, Review and Learning System Project ................................................................. 61
Tawan Junhom, Sawaruk Sirimungklanurak, Siriwat Saiwiwat, Natasha Dejdumrong
(King Mongkut's University of Technology Thonburi)
Proximity Information Exchange based on NFC ......................................................................................... 62
Boripach Khuhaprema, Win Eiwwongcharoen, Supachai Vorapojpisut (Thammasat University)

Section 6 Sufficiency Economy
Markerless Fruit Augmented Reality .......................................................................................................... 64
Songpon Sastrawaha, Sirinad Kapoung, Kumron Sunat (Khon Kaen University)
Design and Implementation of Artificial Prediction Markets Using Logarithmic Market Scoring Rules ...... 65
Pannate Jongpanichkultorn, Prabhas Chongstitvattana, Daricha Sutivong (Chulalongkorn University)
Internal Rate of Return for Probabilistic Cash Flows Project ....................................................................... 66
Phatharaphan Chamnannarongsak, Daricha Sutivong (Chulalongkorn University)
Factors Analysis of Bayesian-based Pricing Prediction Markets .................................................................. 67
Nattanont Olarnthatchanant, Daricha Sutivong (Chulalongkorn University)
Optimizing the Liquidity Parameter of Logarithmic Market Scoring Rules Prediction Markets .................... 68
Suparerk Lekwijit, Daricha Sutivong (Chulalongkorn University)
A Comparison of Moving Average and Support Vector Machine for predicting SET index ........................ 69
Poom Saowalukpan, Tanpitcha Chattrakoonpong, Oran Kittithreerapronchai (Chulalongkorn University)
Thai Sign Language Recognition using Data Gloves and Motion Trackers .................................................. 70
Ditsarin Vongasemjit, Jenwit Amonpongitsara, Chotirat Ratanamahatana (Chulalongkorn University)
Vision-Based Thai Sign Language Recognition .......................................................................................... 71
Jakapan Narkbuakaew, Chanaporn Pikulnarkwong, Chawintorn Pathomkasikul,
Chotirat Ratanamahatana (Chulalongkorn University)
An Improved Traffic Incident Detection System Using Fuzzy Logic ........................................................... 72
Jaraspat La-inchua, Sorawat Chivapreecha, Suttipong Thajchayapong
(King Mongkut‘s Institute of Technology Ladkrabang , NECTEC)

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Load Consolidation Management System ................................................................................................... 73
Ratsuda Amatyakul, Manavut Sunthonpaobvong, Rapeepat Sukprasert, Sukritta Viryasiri, Seeronk
Prichanont (Chulalongkorn University)
Design, Analysis and Testing of Semi-Monocoque Frame for Student Formula ........................................... 74
Kulanun Chutisemachai, Kasemphan Siriployngam, Kiatnathee Dilokthonsakun, Jintasarn Sanchai,
Thanyarat Singhanart (Chulalongkorn University)

Section 7 Energy and Transportation
Design of a Pole-Slipping Protection for Loss of Synchronizing of a Generator........................................... 76
Supachai Sabua, Veerayut Pojui (King Mongkut's University of Technology Thonburi)
Mathematical modeling of radiant cooling room with radiation ................................................................... 77
Jarudon Pattarabancha, Jetarin Chareonpornpoj, Kuntinee Maneeratana (Chulalongkorn University)
Line current time shifting behavior when fault occurred on branch circuit of radial distribution system by
using ATP program.................................................................................................................................... 78
Swanya Sittiprasertphol, Weerapun Rungseevijitprapa (Chulalongkorn University)
Analysis of Voltage Fluctuation based on Thai Utility Regulation ............................................................... 79
Paranee Chailungka, Thavatchai Tayjasanant (Chulalongkorn University)
Reducing Electricity Costs in the Tire Manufacturing by Load Shifting Technique and Using High
Efficiency Motors ...................................................................................................................................... 80
Aleena Sakulsanchartthai, Hadsakoon Boriphonmongkol (Chulalongkorn University)
Design and Construction of a Test Rig for the Cable-Pulley Power Transmission System ........................... 81
Pao Wichayaketsophorn, Poompat Pornwissanukul, Songkran Taepaisitpong, Suksit Wongwanich,
Phongsaen Pitakwatchara (Chulalongkorn University)
Design of a stator ground fault protection for a generator directly connected to a busbar ............................. 82
Sathichai Padungsiripanich, Kailerk Ruangsakul
(King Mongkut‘s University of Technology North Bangkok)
Feasibility Study and Human Machine Interface (HMI) for 'Automatic Control and Monitoring of
a Micro Hydro Power Plant' ....................................................................................................................... 83
Isuru Mudannayake, Anuradha Colombathanthri, Erik Bohez (Asian Institute of Technology)
Analysis of Electric Power Quantities under Sinusoidal, Nonsinusoidal, Balanced or Unbalanced
Conditions ................................................................................................................................................. 84
Phonlawat Wannasiwaporn, Thavatchai Tayjasanant (Chulalongkorn University)
Impact of the Distributed Generator to Protection on Distribution Power System ........................................ 85
Tanyaluck Anusin, Hadsakoon Boriphonmongkol (Chulalongkorn University)
Application of Phasor measurement Unit for Power System Voltage Stability Monitoring ........................... 86
Puriwat Suttitham, Naebboon Hoonchareon (Chulalongkorn University)
Forecasting and Hedging Natural Gas Price for Hedging Electricity Price in Thailand ................................. 87
Sanyapong Petchrompo,Chonawee Supatgiat, Surapong Sirikulvadhana (Chulalongkorn University)
A New Single Solar Tracking System for Concentrating Linear Fresnel Reflectors ..................................... 88
Nopharut Laopornpichayanuwat, Sunhaporn Sribanditmongkol, Sukrit Chuntaravisuid, Supachart
Chungpaibulpatana (Thammasat University)

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Section 1

Sustainable Technology

Remote Agricultural Data Management System for Royal Project Foundation

Tuchchai Apinuntakulchai and Apinya Phanumphai
Advisor: Surapont Toomnark, Thagorn Tangmankhong and Kraikron Settakraikun
King Mongkut‘s University of Technology Thonburi, Bangkok, Thailand,
e-mail: Surapont.too@kmutt.ac.th

Royal Project Foundation has many local agricultural research stations at highland area such
as Doi Inthanon, Doi Ang Klang etc. The main activity of each research station is to develop
winter plants experiment and also plant processing. There are many environment parameters
required to support the research. Because of highland area, the limited of electrical power and
communication facility effect to data management for research. To solve that problem, a
model of system support to agricultural data management is presented.

Model of system at each research station is set as head and child node. Each local site has
many small plants that produce different products. Each small plant is denoted as ―Site‖. This
system is designed in the hierarchical communication level. The top level consists of the
required information for all local sites of the Royal Project Foundation that we called ―Main
server‖. The lowest level is the ―Head node‖ of each site or ―Child node‖ for the case that
each site requires more than one node.

This research has 2 main parts, the data gathering and data center. The data gathering is an
embedded system that transmits information to the data center. The data center is a system
that provides information for user by web application. The embedded system has 2 functions,
the monitoring system for maintenance and the data logger. The monitoring system is a
tracking system for preventive maintenance in the rural area.

The data logger is a meteorological embedded system which consist sensors and
communication module. This data logger called ―Head node‖ is installed at a site. Some site
requires more than one data gathering device due to the different data. We call those other
devices are ―Child node‖. Therefore, a site has more than one node, it is necessary to have
only Head node. The Head nodes were connected to the local network for transmit data to the
main server. Head node from each site can send data to other Head nodes using packet radio
when Head node has no internet or network connection. At the Main server, there are 2
modes as online and offline modes. The online mode is the normal mode that the
communication between main server and lower level device is complete. The offline is the
opposite way. There is a server that located at the main office of Royal Project Foundation. It
will gather all information from local site Head nodes in form of database.

Finally, this project will manage real time local data from the sites as useful information for
further operations. We also develop embedded data logger system which appropriate for rural
environment. The lack of data communication also solve by package radio technique. The
user friendly web applications also support to researchers and office staffs.

2

Online shopping mall

Parita Doungngam, Chachanok Somchit, and Artit maneesri
Advisor: Sirapat Chiewchanwattana
Khon Kaen University, Khon Kaenn, Thailand.
e-mail knack_za@hotmail.com , parita_59@windowslive.com and khemcs@gmail.com

Online shopping mall is an android application which is developed as an alternative of the
user. The application helps the market promotion. The system is divided into 2 parts which
are the web application and the mobile application. The web application, the main function of
this part used in communication between users and providers which also helping in sell
promotion of each online shop. The information about sell promotion which stored in
database center will be called by web service and display via web browser.

So it can display both in web browser from desktop or PC and the mobile application.
Another part is the mobile application. Facebook fanpage is another channel for shop
promoting. When the store owner has created a store webpage which working on PC, the
facebook fan page will be included. If the store is an android, there are 2 choices; use or not
use facebook fanpage. The user can download Online Shopping Mall application to install in
heir own mobile phone and browse for interested products. It is suitable for users who prefer
using internet from mobile device.

Which the online shopping malls will help improve the quality of life is better. Because
improving the quality of a better life, improve the accord of life and compatible with the
changes in the future. So it matches our project, Emphasize the use of technology is
becoming popular for example the facebook is used facebook fanpage and android on mobile
application help develop. Which modernize and increase the convenience to the user.

3

Comparison of indoor SLAM using ceiling images with different state representations

Piyapat Saranrittichai
Advisor: Nattee Niparnan, Attawith Sudsang
Chulalongkorn University, Bangkok, Thailand, e-mail: charn_pay@hotmail.com,
nattee.n@chula.ac.th, attawith@cp.eng.chula.ac.th

In Robotics, Simultaneous Localization and Mapping (SLAM) is the problem whose
objective is to simultaneously estimate robot configuration and map of its environment from
sensor data. It is widely used in autonomous mobile robot systems to enable robust
navigation in given environment. Currently, many research works are conducted to solve
SLAM in several environment conditions. This work focuses on crowded indoor setting
where grid map SLAM methods using traditional laser range finder do not work properly. We
use fisheye camera. The camera is installed to look upward at the ceiling in order to perform
mapping of ceiling‘s visual features. This approach avoids the occlusion issues from the
crowd and other moving obstacles in the plane of navigation. Harris corner features is
extracted due to its ease of tracking using Lucas-Kanade optical flow.

To solve indoor SLAM, location‘s state vector is typically represented as a three-dimensional
state vector of the robot‘s position (x, y) and heading direction (θ). This is sufficient for a
robot using features on the two dimensional plane of navigation. Our case is different; our
method observes ceiling visual features. It appears that the fish-eye camera is not always
looking straight up. Vibration during robot‘s motion may cause slight variation of the
viewing angle. Robot at the same location may observe different ceiling images. As a result,
we propose to compare SLAM using EKF-SLAM with different state representations, i.e., the
three dimensional location‘s state vector of [x, y, θ] T and the six dimensions locational
state vector of [x, y, z, α, β, γ] T where z is the height of the camera from the floor and α, β
and γ are yaw, pitch and roll angle of the camera respectively.

The experiment is conducted using a physical robot in the real world. The accuracy of the
maps is calculated by performing scaling Iterative Closest Point (SICP) between the resulting
maps and the ground truth map. The result clearly shows that SLAM with six dimensional
location‘s state vector is more accurate.

4

Fabrication of Micropore on Silicon substrate

Krairat Mairin
Advisor: Mana Sriyudthsak
Chulalongkorn University, Bangkok 10330, Thailand, e-mail: krairat.mairin@gmail.com

Recently, Micro-Electro Mechanical Systems (MEMs) has involved in medical technology in
many aspects. Since MEMs has a small size, so there are many benefits of that. Example of
MEMs benefits are cost reduction, mass production, quantum effects and high potential to be
implantabled devices.

This project is about micropore fabrication on silicon wafer using photolithography process
and wet chemical etching. In this project the anisotropic etchant, KOH, is used to form the
pore. The procedure of this project is divided to 3 main steps; preparation, pore-fabrication
and evaluation and discussion. The first step is mainly on theoretical design and calculation,
thickness of silicon oxide layer from thermal oxidation as a mask was estimated according to
the the KOH-Silicon etching rate. Mask diameter of 650 μm was estimatated for the designed
pore size of 150 μm. For the pore formation, the process starting from cleaning the silicon
wafer, growing the SiO2 on silicon wafer, transferring the pattern to oxide layer and etching
the silicon by KOH (20%) at 80๐C. Scanning electron microscope (SEM ) was use to
observed and measure the pore size.

The result of this project was a micropore on silicon wafer with a diameter of 200 μm. It is
believed that the diameter of pore size can be formed smaller than this by using silicon nitride
or gold as a mask for KOH etching, because of their selectivity is better than Si/SiO 2 in KOH
etching.

If the micropore can be repeatedly fabricated. It would have a lot of applications waiting for
it. For example, micropore can use to measure the deformability of a human RBC (red blood
cell) which can be used to study the factors that affect the deformability of a human RBC.

5

Development of an Embedded BLDC motor controller using RS485 standard

Teeratath Ariyachartphadungkit
Advisor: Kanjanapan Sukvichai
Kasetsart University, Bangkok, Thailand, e-mail: teeratath@gmail.com

The development of robotic is more advanced in previous 50 years in many industries. The
most important component of the robot is an actuator. Robot can achieve very sophisticate
task by very precise joint motion. In this research, the brushless DC motor (BLDC) driver
controller is focused in order to make the motor has superior performance. BLDC motor is
widely used in industrial robot arm and other manufacturing machine because it has more
efficiency than regular DC or stepper motor. The main problem in order to use this kind of
motor is the driver circuit and control since this motor must be driven at precise phases and
sequences. Low cost embedded BLDC motor driver system is developed in this research.
ARM Cortex M3 from STMicroelectronics is used as the main controller. The FreeRTOS is
also implemented to the system. RS485 is used as the standard communication between Host
PC and the controller board. By using this technique, the controller can be easily replaced the
old stepper or DC servo motor controller in the production lines. Proportional-Integral-
Derivative (PID) speed and torque control laws are implemented as a built-in function in the
embedded system. All PID parameters can be set via RS485 protocol.

The embedded system in this research can be separated into 3 sub circuits. First is the BLDC
driver using Field Effect Transistor (FET). There are 3 phase coils in BLDC motor; thus, the
driving circuit must contain 6 FETs. Normally, there are two types of FETs must be used to
drive BLDC which are n-type and p-type but p-type is expensive and can be only use in
present of small driving current. In this paper, 6 n-type FETs are selected associated with
charge-pump and bootstrap to increase driving current. Bootstrap circuit will boot up the bias
voltage of source pin at n-type FETs. The second circuit is the controller circuit. Hall sensors
are attached to the BLDC motor in order to obtain phases. These hall sensors are not only use
to drive the motor coils at correct sequence but also they will be used to calculate the speed of
the motor. Hall sensors will be read by microcontroller and used in PID-Torque control
algorithm. The third part is the RS485 circuit. This communication is half duplex
communication. Each driving has its own id which can be set by initial setup. The command
packages are sent to the embedded system and it must response in specific of time. Moreover,
the microcontroller must handle communication packages and perform precise motor control
at the same time. Therefore, the FreeRTOS is implemented to this driver system in order to
schedule the sequence of tasks to achieve the hard real-time requirement.

6

An AU Golf Car: Autonomous Parking System

Hemmawat Yensuong*, Patompong Sulsaksakul, Passaporn Rattanasetyith,
Pattanan Detkrut and Pasawat Laokhonkha
Advisor: Narong Aphiratsakun
Assumption University, Bangkok, Thailand, e-mail: nott_abac@hotmail.com

This paper presents part of the research work carries out at Assumption University to develop
technology to control and route the motor vehicle. Our objective is to endow the vehicle with
an Autonomous Parking System, which is a self-parking technology that assists motor vehicle
in parallel parking. The system is developed to be completely autonomous: steering, pedal,
brake and gear. The driver will no longer need to assist the vehicle by regulating the speed
like most systems on the market.

In the self-parking operation, the vehicle moves forward into the position beside the front
vehicle and the system will notify the driver when to stop if the parking space is large
enough. The driver then engages the system and the vehicle will goes into reverse mode
automatically and will move backward slowly. At the same instance, the steering system will
autonomously maneuver the vehicle seamlessly into the available parking space. The
microcontroller FIO board based on STM32 platform and dsPIC30F4011 are fundamental
elements in the operation of self-parking to the extent that they are the main processor that
monitors, manage, and control the entire system and operations. The FIO board will act as the
main controller and two dsPIC30F4011 will perform as joint controllers of the system. This
system utilizes ultrasonic sensors located at rear quarter panel and rear bumper of the vehicle
to detect the available space and calculate the area of the parking space. The EDM (distance
detection encoder) also simultaneously measures the distance of the available parking space
by measuring the rotation of the wheel, which will feed the data back into dsPIC30F4011.
The vehicle will be equipped with several preset-parking profiles to allow more capabilities
in parking with different size or conditions of parking. When there is a match to the profile,
the vehicle will perform parallel parking autonomously. During the operation, the ESAM
(steering angle measurement encoder) will measure the steering angle of the steering wheel
and make adjustments to the steering angle achieve a perfect parking.

This paper presents the method and process of parking detection, automated steering, and the
integration of the components on the AU Golf car. The result of the self-parking is very good
and accurate. AU Golf car could park at the appropriate parking slots with several
experiments.

7

Improved Material Removal Rate by Abrasive Water Jet Milling

Kasidet Wangvithayakul*, Ukrit Jampachon, and Sataphol Wattnapornmongkol
Advisor: Pairat Tangpornprasert
Chulalongkorn University, Bangkok, Thailand, e-mail: pairat.t@chula.ac.th

At the present, the conventional milling using in material removal has an amount of
restrictive weaknesses. For instance, it is time- consuming and costly for operation, in
addition, it is difficult to operate in complex area or the small size of the work-piece.
Furthermore, high-toughness materials; stainless steel, alloy steel and titanium, can shorten
the lifetime of cutting tools. As the consequence of this, Abrasive Water Jet (AWJ) cutting,
involving the entrainment of abrasive particles into a high pressure jet of water, is being
introduced. Due to the high competency in material removal, AWJ milling could be an
opportunity to minimize machining time and increase process flexibility.

However, AWJ is generally used in through cutting material. The crux of AWJ milling is the
controlled depth of cut. Therefore, the first investigation is to study the parameters which are
related to the depth of cut: feed rate, water pressure, the garnet size, abrasive flow rate and
stand-off distance. As the result, the relation between feed rate and depth of cut tends to be a
linear pattern. Feed rate was chosen to be the process parameter under the design of
experiments while other parameters were set at constant values. Providing feed rate is
maintained as constant speed along a jet path, the depth of cut can be controlled in a
singleline pattern. The simple technique of AWJ milling has been developed by moving jet
back and forth in rectangular shape and changing lower feed rate to increase material removal
rate (MRR). The size of the experimental area was 30x20 mm and the experiment was
conducted at 5-40 mm range of the depth.

Nonetheless, penetrating traces at both sides of pocket milling, caused by impact of water
hammer at the beginning and ending point, could be hindrance. Therefore, one of the
effective solutions is to use high-hardness material (high speed steel, HSS) as masks,
protecting both penetrated sides. By doing this, the penetrations were removed and the
surface of pocket milling was uniform pattern. Likewise, the experimental results mainly
seem to be contentable; for example, the sample of experiments, using the depth of pocket
milling at 20 mm, of AWJ milling spent 12 minutes in operation whereas conventional
milling by 8-mm-size tool spent 15 minutes. From this experimental observation, AWJ
milling has more 20 percent of MRR than conventional milling.

8

Section 2

Science and Technology

Disruptions to Saccade Planning: Effects on Eye Movements

YueYinglong*,Yen Shih-Cheng, and Chua fook kee
Advisor: Shih-Cheng
National University of Singapore, Singapore, e-mail: u0904828@nus.edu.sg

The planning and execution of voluntary saccades to shift the eyes around and encode each
parts of the scene or movie is required when you performing a memory task after viewing a
scene or movie. Two experiments are deployed in this study to examine how eye movements
respond to sudden disruptions in saccade planning during natural scene and motion clips
viewing. The experiment to explore eye movements by using static scenes was intensively
studied previously. However, the research have been done under dynamic scene transition are
seldom studied. Moreover, previously studies used the time as the parameter to trigger
disruption, for example, the second scene as a disruption was displayed immediately after a
scene had been viewing for 4.5 seconds. Therefore, in this study, instead of using time, we
are going to use fixation numbers as the parameter. Participants viewed two consecutive
scenes or movie clips. Three distinctive groups of eye movement were observed when scene
or movie transitions were introduced. Fixation ended more than 100ms called End--late
group, duration when the transition occurred were elongated, and the eyes move towards
center immediately, landing there in the first fixation after transition, Fixations in End-Early
group ended less than 100ms after transition, stayed at first fixation after transition for a very
short period, subsequently move towards to the center, landing there in the second fixation
after transition. When transition occurred during a saccade, this Sacc group exhibited the
similar behavior of eye movement with End-Early group. Besides, its fixation duration did
not vary before and after the transition. Our suggestion, for End-Late group, transition
occurred early enough that allowed the eyes to abort the original saccade planning and
reprogramming towards to the center, a salient vantage point to re-start scene or movie
exploration at the first fixation after transition. The fixations in End-Early group, there is not
enough time for the saccade to reprogram when the transitions occurred, so that the saccade
executed in the original plan and delayed the centering of eye movements. In terms of Sacc
group, saccade planning would not be affected when transition occurred during saccade,
hence, the saccade landed in the first fixation shortly and centered at the second fixation.
Moreover, By comparing the results from two experiments. The effect of saccade
reprograming is more salient in the Static case. It would probably because movie clips were
involving in many motion changes, people have adapted to these changes and become less
sensitive to the scene transition.

10

Parallel Additive Implementation for modified Flexible Interval Representation System

Phoonlarp Mekraksakit*, Thanisorn Thanapongsapak, Chawin Wongchindakhun,
Advisor: Athasit Surarerks
Chulalongkorn University, Bangkok, Thailand, e-mail: Athasit@cp.eng.chula.ac.th

A major problem in a domain of computer arithmetic is to reduce the computational time. It
needs improving and developing for now, as we can see that many researchers try to
introduce an algorithm to solve this problem. However, some of these lead to the errors
during computation, because of constraints in the real world. Therefore, many researchers
spend their time to develop a number system representing intervals that be used for dealing
with round-off error problem. In the present, there are many interval representation systems
proposed for coping with this problem such as Flexible Interval Representation System
(FIRS), which is considered to be a system having a good performance in memory and
computational time. Therefore, we will focus on improving computational time for FIRS.

For generalizing the FIRS with binary base, we firstly develop a new interval representation
system for bases are any algebraic numbers by modifying the FIRS, that we call it modified
Flexible Interval Representation System (mFIRS). In order to improve mFIRS computational
time, our interest is to manipulate operations in parallel manner. As the addition is a
fundamental arithmetic operation for others, so we propose parallel addition algorithms for
mFIRS, which we classify into two parts. The first part is created for dealing with the
symmetrical digit set while another part concerns with the unsymmetrical digit set. Lastly, we
also introduce the way for implementing these algorithms in a practical way by representing a
function for cellular automaton.

With these solutions we have mentioned above, now we can be able to add two intervals in
parallel manner for any algebraic number bases which have no conjugate of modulus one.
Our algorithms do not need to do any non-parallel processes after doing these algorithms,
which can solve computational time problem indeed.

11

A Quadrature Current Controlled Oscillator with 250 – 700 MHz Tuning Range

Radit Smunyahirun
Advisor: Ekachai Leelarasmee
Chulalongkorn University, Bangkok, Thailand, e-mail: radit05@hotmail.com

Since the broadcast system of television in Thailand will change from analog to digital
system, there will be plenty of frequency spectrums available for other communication uses.
This spectrum occupies approximately from 200 MHz to 700 MHz and is called ―White
Space‖. As with most of communication system, quadrature oscillators are the key
component in generating career signals. This work presents a quadrature oscillator whose
frequency can be tuned within the white space spectrum by using currents, hence the so
called ― quadrature current controlled oscillator‖.

This circuit that we propose is shown in Fig.1 where currents are outputs. It uses
three identical current mirrors connected in a ring fashion. To obtain the quadrature phase, an
extra capacitor is added to the middle current mirror. Its value is very large with respect to
parasitic capacitors within current mirrors. As dictated by Barkhausen criteria, the sum of
phase shift between input and output current signal of three current mirrors must equal to 360
degrees. Due to the added capacitor, phase shift between of the middle current mirror is
almost 90 degrees or quadrature related. From analysis, we get simple equations for design as
follows.
(1)
(2)
and (3)

where is phase shift deviation from 90 degrees between , is gain of a single current
mirror, is the sum of all parasitic capacitors of a single current mirror, is
transconductance of N1, N3 and N5, and is frequency of oscillation. Since depends on
bias current, we can adjust by tuning the DC bias of all PMOS to change DC current
bias of all current mirrors.

The simulation result of the circuit by using Multisim with , , and
is shown in Figure 2. From this simulation result, we obtain
and .
.

12

Real Time People Tracking and Collision Avoidance using Sensors Fusion for an Indoor
Omni-directional Wheels Mobile Robot

Bhirawich Pholpoke
Advisor: Kanjanapan Sukvichai
Kasetsart University, Bangkok, Thailand, e-mail: b521050113@ku.ac.th

Indoor robot applications fascinate robot researchers because they can be implemented and
have potential to be used in the real world applications. A person tracking is one of the most
important parts of mobile robot applications because it can be used to take care and help
people in everyday life. The robot not only tracks a person but must also run in a real
environment without colliding with obstacles. Therefore, the robot has to know its state such
as velocity and position in the environment while sensing the obstacles surrounding it. In this
paper, we divide the topics into two parts, i.e. the robot odometry estimation and a person
tracking trajectory generation algorithm.

First, the omni-directional wheel mobile robot though has a good maneuverability for many
kinds of environment but it always faces wheel slippage due to its mechanical characteristics.
This makes the wheel encoders which sense the rotation of wheels do not provide accurate
robot‘s velocity. This inaccuracy in odometry information, it is important for further robot
localization and control processes. Normally, an inertial measurement unit (IMU) is usually
used to fuse with wheel encoder data to increase the overall accuracy but this technique is not
sufficient applied to the high slip environment. By adding a laser range finder sensor, laser
scan matching technique can be implemented in this paper to improve system accuracy. All
of information from encoder, IMU and laser scan matching method are combined by using
the Kalman filter technique.

Second, a person tracking algorithm is an essential purpose of this paper in order to help
people in many activities, such as following and carrying items for people or carrying food
for elderly in a house. In this paper, tracking module is developed by using a laser range
finder sensor to track the initial object which is assumed to be a target person. Then, the
maximum likelihood algorithm is used to decide and perform as a data association algorithm
for probability filtering in the next process. Other important issue in this research is a safety
issue. The robot needs to be used in the real environment such as houses, offices and malls
which have wide varieties of obstacles. Therefore, the robot must track the person and avoid
these obstacles simultaneously. Safety must be obtained from the environment and the stop
command must be sent to robot before collisions against obstacles occur. Besides, the robot‘s
dynamic constraints are necessary to assign the safe trajectory for a desired path to the robot.

In conclusion, the real implemented robot was built and experimented. Robot consists of four
Swedish onmi-directional wheels driven by dc motors. Two URG-04LX laser scanners from
Hokuyo Automatic Co., Ltd are used as robot laser range finder devices; one for tracking and
another for avoidance. The example of an experiment result shows that the overall system
works pleasantly. The robot can maneuvers through the messy environment and it can track a
person while avoid the obstacles. All of these can be the fundamental for developing the
robot that can help elderly or handicap and improve human quality of life in the future

13

Design of a Phasor Measurement Unit (PMU) using FPGA

Porjed Sakunjareanpornchai
Advisor: Thirawut Fueangfu
King Mongkut‘s University of Technology North Bankok, KMUTNB
Bangkok, Thailand
e-mail: s.porjed@gmail.com

An imbalance of power generation and load in a power system causes the fluctuation of the
power system frequency. Changes in active and reactive power flow due to disturbances
affect the power system stability. The system operators need to know the transient behavior
of the system in order to improve the operations. Normally the operators use the control and
monitoring system called SCADA. However, the SCADA system updates every 2 – 6
seconds. This is not fast enough for the operator to remedy the effects of the disturbances in
real time. This also makes the recorded values useless for later transient analysis.

A phasor measurement unit (PMU) is a monitoring system that monitors bus voltages and a
frequency in real time. It sends the monitored values every 100 milliseconds to the server.
The differences in voltage angles of the system buses indicate active power flow. The
differences in voltage amplitudes show the reactive power flow. The changes in the
frequency (df/dt) can predict a system behavior.

The project designed the phasor measurement unit using FPGA. First the simulations were
done in EMTDC/PSCAD to obtain the power swing signals. Then the signals were imported
to MATLAB to test the algorithms. Next the algorithms were written on FPGA board to
make the PMU hardware. Finally the hardware was tested with OMICRON.

14

Fire Infiltrating Robot with Image Acquisition: A Microcontroller based Urban Search
and Rescue (USAR) Robot

Ruth A. Silvallana, Russel L. Amado, Kristoni R. Aquino, Carmen Fe C. de Guzman,
Moreno, Kendrick Kent L.
Electronics Engineering Department, Technological Institute of the Philippines, Quezon City
Philippines, e-mail: tip.edu.ph

The principal objective of this design is to lessen the risk of the job of fire fighters in
responding trapped victims inside fire incident area. A fire infiltrating robot was designed
and constructed as an Urban and Search Rescue (USAR) robot that has a real time image
acquisition utilizing wireless fidelity (Wi-Fi) technology to see the current situation inside the
emergency area which can be view in a customized controller, and wireless intercom to allow
fireman-victim communication. Further, it contains first aid materials at the back portion
compartment of the robot to increase the survival rate of trapped persons. The robot can also
send back ambient temperature and battery capacity to the controller. This robot is overall in
two parts: electronics and mechanical components. Electronic components such as the
PIC16F877A for the microcontroller, transceiver module, motor relay circuits and voltage
regulators. The mechanical components are Honda wiper motors, Stone Wool for thermal
insulation, aluminum and galvanized metal.

Different testing procedures were conducted to assess the robot‘s functionality. These
procedures are the test for maneuverability of the conveyor wheels at flat surface which will
test the robot‘s forward, backward and sideward movement and climbing downstairs/upstairs
capability at standard staircases. The material heat resistance was also tested specifically the
chassis that protects the electronic parts of the robot. Speed response and image acquisition
display quality were also included at the testing procedures. These tests result verified the
USAR application of the robot as a useful tool during fire emergency operation.

15

A New Algebraically Simple Chaotic Jerk Circuit
and System using Memristor Nonlinearity

Jirayu Peetakul and Sawitee Wangthawal
Advisor: Wimol Sanum
Intelligent Electronic Systems (IES) Research Laboratory
Faculty of Engineering, ThaiNichi Institute of Technology (TNI)
Patthanakarn, Suanlaung, Bangkok, Thailand, 10250. Fax :(+662)7632700,
Tel :(+662)7632600
e-mail addresses: jirayu.p.tni@gmail.com and wimol@tni.ac.th

Chaotic systems have been characterized as a system that offers a sensitive dependence on
initial conditions, i.e. small perturbations ultimately results in a dramatic change in system
states, and attracted great attention in recent years due to many possible applications in
various fields such as in secured communications and nonlinear control systems.
Considerable research interests have been made in searching for new chaotic systems with
minimal algebraic models as well as simple circuit implementations. The memristor, which is
postulated by Leon O. Chua in 1971 and successfully fabricated in 2008, is a two terminal
element in which magnetic flux between the terminals is a function of the electric charge that
passes through the device. Such a memristor has been realized as an addition to existing basic
circuit components including resistor, capacitor, and inductor. In particular, the memristor
can be modeled by third order polynomial and exhibits PieceWise Linear (PWL)
nonlinearity, which can be utilized in designing nonlinear chaotic circuits. Recently, chaotic
circuits implemented based on memristor have been suggested as a promising technology in
nonlinear dynamic circuits. However, algebraically simple and feasibility in dynamical
behavior variations have not much been investigated. This paper suggests the design of
algebraically simple chaotic jerk circuit and system through the use of memristor nonlinearity
where the term ‗jerk‘ comes from the fact that successive time derivatives of displacement,
velocity, and acceleration. The proposed system is simple in terms of mathematical model
with wide range of complex dynamical behaviors. The simulations have been performed in
MATLAB whilst the circuit implementation on board has realized a multipliers no. AD633
for building the memristor. Dynamical properties are demonstrated in terms of Equilibria,
Jacobian matrix, chaotic attractors, Bifurcations, Lyapunov exponents, KaplanYorke
dimension, and Poincaré maps. The proposed circuit offers a potential alternative to nonlinear
oscillators in communications and controls applications.

16

An AU Golf Car: Obstacles Avoidance System

Ankur Agrawal*, Krittamate Jirundorn, Tidarat Punyachai and Samuel Hussain Mogakolodi
Advisor: Narong Aphiratsakun
Assumption University, Bangkok, Thailand, e-mail: nott_abac@hotmail.com

This paper presents part of the research work carries out at Assumption University to develop
an autonomous obstacles avoiding car. The car uses a digital camera as its primary sensor to
detect obstacles and calculate the optimum route to avoid the obstacle and use as little energy
as possible while doing so. This system could be a building block in a completely
autonomous car. Self-driving cars could bring along many benefits such as increased road
safety by taking humans out of the equation, and a decrease in road congestion due to poor
driver habits to name a few.

We are using Golf car as a test plant. This golf car uses a camera, in conjunction with an
image recognition program written in openCV to recognize objects that need to be avoided.
Once the obstacle has been detected, the software calculates it position and its area. This
information is used to send instructions to two separate dsPIC30F4011 microcontrollers,
which then send the data to a FIO board, which is based on the STM32. The FIO board then
adjusts the steering wheel, accelerator pedal, brake and gear in order to avoid the obstacle
with as little deviation from the original path as possible. This is demonstrated by the block
diagram, where arrows labeled ‗D‘ represent digital signals while those labeled ‗A‘ represent
analog signals.

AU Golf car could avoid placement of obstacles on the road with several experiments. Future
additions to this system include a more accurate detection and tracking system, possibly
through more complex software and/or through the inclusion of ultrasonic sensors.

17

Stability Control of a Self-Driving Bicycle

Vittavat Kaewmaneekul *, Sompong Jarujitjumlern and Whicha Thaitavon
Advisor: Viboon Sangveraphunsiri
Chulalongkorn University, Bangkok, Thailand, e-mail: vittavat.vkk@gmail.com

This project, we propose a control strategy to stabilize an autonomous electric bicycle based
on the well-known state variable feedback. The simplified dynamic model of the bicycle is
the most important for the design of the controller. The necessary parameters of the dynamic
model are verified through 3D computer models and experimentation. The stabilizing control
of an autonomous bicycle is derived independently based on the simplified model. The
steering for stabilizing the bicycle is derived based on the output-zeroing controller or
regulator. A programming tool, LabVIEW, is used for developing an embedded control and
implemented on the National instrument hardware, the Compact RIO. A velocity controlled
conveyor is designed for verifying the total controlled system. The numerical solutions based
on the simplified model with the parameters of the model obtained from experiments are
shown and are confirmed by experimental results to verify the effectiveness of the proposed
control strategy.

18

Investigating on Damping Property of Laminated Composite Materials

Thanyarat Singhanart *, Kritsadaporn Thongsawang, Nattapon Kaewchalam
Nutthasan Srikwanma and Worapol Phraechinda
Department of Mechanical Engineering, Chulalongkorn University,
Phayathai, Pathumwan, Bangkok, 10330
* fmetsn@eng.chula.ac.th, Telephone Number: 02 218 6619, Fax. Number: 02 252 2889

An aluminium laminate – a wall structure made of polyethylene plate attached with
aluminium sheets on both sides by glue - is studied in this paper. As the vibration of the
structure can be controlled by the damping properties, the objective of this paper is to
determine the basic damping properties of aluminium, glue and polyethylene by an
experiment that is based on the determination of the logarithm decrement under free bending
vibration of beam with ended mass. The effect of frequency is considered by varying beam‘s
length and ended mass. In the experiment, the cantilever beam is excited by the cyclic
magnetic force at the fundamental natural frequency. Then, the force is removed to produce
the free vibration during which the deflection is detected by the laser displacement sensor.
The logarithm decrement can be determined from the experimental results and the basic
damping property as the function of frequency is presented in terms of specific damping
capacity (Fig. 1). As the specific damping capacity of the laminate can be determined using
the basic damping properties of the components, the specific damping capacity of aluminium
laminate is also predicted and verified by using the finite element method as shown in fig. 2.
Two finite element models is only considered; one is the model including aluminium and
polyethylene without glue and the other one is the model with glue. The results show that the
specific damping capacity can be predicted but the predicted value is smaller due to the effect
of shear strain in polyethylene and glue. In conclusion, this paper presents the experiments
for finding the basic damping properties of the materials and the specific damping capacity of
aluminium, glue and polyethylene as well as the aluminium laminate.

19

Section 3

Health and Medicine

Design of an appointment system and bed management for Chemotherapy department

Thanakrit Thanathipanont* and Achiraya Eurakarawong
Advisor: Wipawee Tharmmaphornphilas
Chulalongkorn University, Bangkok, Thailand, e-mail: irean_achiraya@hotmail.com

Daycare or Chemotherapy department of a studied hospital receives patients from 4 main
upstream departmentsconsisting of Radiology department, Hematology department, Medical
Oncology department and Surgery department. The number of patients arriving at the daycare
department depends on the diagnosis schedulesof these 4 departments. Since the upstream and
daycare departments never collaborate in capacity planning, demand at the daycare department is
fluctuated resulting in demand over capacity on peak days. Currently, the daycare department
does not have an appointment system. Patients receive their queuing numbers and need to wait at
the department without knowing their expected time to service.

We develop patient information and drug formula databases that are linked to an appointment and
bed management application to help schedule patients and assign patients to beds. Two
scheduling rules are offered in the application, which are FCFS (the current rule used in the
hospital) and FCFSconsidering bed utilization. This application can provide information such as
queuing number, expected time to service to patients and help nurse in arranging beds.
Simulation is applied to analyze system performance. We found that the FCFS considering bed
utilization rule provides 5% increased in bed utilization, reduces the number of postponed
patients from 5 to 3 over peak days; however, increases 30 minutes of waiting time comparing to
FCFS rule.

We also propose a plan to smooth the demand by rescheduling diagnosis at the 4 upstream
departments. With simulation, we found that the new diagnosis schedule combining with FCFC
rule decreasesthe waiting time and number of postponed patients approximately 30 minutes and 4
out of 5 persons, respectively. Also, the new diagnosis schedule and FCFC with considering bed
utilization decreases the waiting time approximately 20 minutes and results in no postponed
patients.

21

Individual Speech Synthesis for ChulaDAISY

Sivaporn Homvanish*, Thiti Watansrimongkol, and Natchanon Phachongkitphiphat
Advisor: Proadpran P.Punyabukkana and Atiwong Suchato
Chulalongkorn University, Bangkok, Thailand, e-mail: Thiti.Wa@student.chula.ac.th

Individual Speech Synthesis for ChulaDAISY is the system that is implemented to help
create audio books for blind people who have no chance to reach knowledge freedom, so it is
hard for them to deal with daily knowledge form books. ChulaDAISY program is the
program that can create DAISY typed book (an audio book with full text). However, when a
volunteer who want to record their voice for making an audio book. They need to read and
record all sentence, which is a very time-consuming process. This project, Individual Speech
Synthesis for ChulaDAISY, will solve this problem. When users who are volunteer creating
audio books import content of books in formatted in document (.doc and .docx) and use this
mode. Program will look for all necessary phones that use in the project and store the
sentences which have those phones in the project. Then, program will show all sentences
which users have to record on the screen. This system helps users to reduce time to spend
while they are recording their voices for creating audio books because they do not have to
record all of sentences that have in books but program has chosen some sentences that cover
all of phones used in project. When users have finished recording, voice synthesis button will
appear and if users click this button, program will generate personal voice model to fulfill the
other sentences that have not recorded yet automatically. Moreover, this system will store
user's voice in the program. This feature will help when the same user want to use their voice
for making a new book.

22

Real-Time Gait Analysis Using Kinect-based Motion Capture System

Pattaravut Maleehuan
Advisor: Pizzanu Kanongchaiyos
Chulalongkorn University, Bangkok, Thailand, e-mail: Pattaravut.M@student.chula.ac.th

The human gait has traditionally been studied subjectively through visual observations. By
combining advanced measurement technology and biomechanical modeling, human gait can
now be measured objectively. Today, there exists commercial systems can both capture
the end- user data, consisting of several important parameters in gait cycle, and analyze
the data for clinical diagnosis. However, the cost of such motion capture system is still too
high, hence only a few hospitals in the city can afford while patients cannot access to these
services at rural hospitals and clinics. This project proposes a real time motion capture system
based on low-cost Microsoft Kinects, each consists of infrared depth sensors and cameras, for
gait motion capture. Without marker configuration, kinematics and kinetic calculations can
be performed and standard temporal and spatial parameters such as joint angles can be
reported. Other typical gait parameters are speed, stride length, step length and time, stance
and swing phase can be user-defined or automatically computed. Finally, both proposed
system and commercial motion capture products at Chulalongkorn Comprehensive
Movement Disorders Center‖ are used to capture gait motions in parallel. Euclidean distance
between each joint parameter of both captured motions shows that the proposed system gives
the similar capture results to the commercial systems at the hospital. Besides its lower cost
and ease of set-up and configuration, the proposed system also provide the suggestion
algorithm for evaluating a Parkinson‘s patient‘s status which may be useful for hospitals and
clinics in rural areas where no gait specialists such as physiotherapists, orthopedists or
neurologists.

23

Gait Phase Detection using Wireless Smart Shoe with
Optimized Threshold by Genetic Algorithm

Nantawat Pinkam
Advisor: Itthisek Nilkhamhang
Sirindhorn International Institute of Technology, Thammasat University, Bangkok, Thailand,
e-mail: pinkam.nantawat@gmail.com

Nowadays, there are many kinds of gait rehabilitation technology to assist people who have
problem walking to attain the normal gait. Motion capture technology, such as VICON, can
be used to acquire body movement and provide three dimensional analyses.
Electromyography (EMG) is a biomedical sensor that can also be used to verify gait
abnormality, such as Lokomat developed Hocoma. However, these gait analysis devices lack
mobility due to the need for large equipments.

This paper proposes a novel decision system for segregation of five normal gait phases
(stance, heel-off, swing 1, swing 2 and heel-strike) by using a real-time wireless smart shoe.
The classification uses four force sensitive resistors (FSR) to measure force underneath the
foot together with an inertia measurement unit (IMU) that is attached at the back of the shoe.
In addition, IMU gives magnitude of acceleration and inclination angle of the foot with
respect to the ground. Data acquisition is collected through XBee wireless network protocol
in order to be processed serially by a computer. Threshold-based state transition theorem is
used to distinguish gait phases from received data. Video recording with real time data
embedded interface is used to verify the output of the proposed gait phase detection
algorithm. Experimental testing is conducted indoors on a treadmill. The verification process
uses human inspection to classify the gait phases from the recorded video based on the gait
phase definition. The thresholds of state transition are optimized by genetic algorithm by
comparing sets of thresholds with the result from the video. This method was experimented
and verified by a person who has a normal walking gait cycle.

This smart shoe can be used for gait rehabilitation of people who have abnormal gait, such as
the elderly and people who suffer diseases effecting their ambulation cycle. It can also be
applied in sportwear to help improve the performance of athletes. Most significantly, normal
people can use smart shoe to evaluate their own walking style. Moreover, the advantage in
mobility allows smart shoe to be used in other equipments, such as a prosthetic knee.

24

Ultrasound B-scans Image Denoising via
Expectation Maximization-based Unsharp Masking

Theerawit Wilaiprasitporn
Advisor: Chedsada Chinrungrueng, Widhyakorn Asdornwised
Chulalongkorn University, Bangkok, Thailand, e-mail: pswnaru@gmail.com

In this paper, we present an unsharp masking-based approach with subsequent bilateral
filtering stage to noise smoothing of ultrasound (US) image. At our first processing stage,
we propose image segmentation via EM to segregate two pixels populations instead of
separating original image into the low- and high-frequency components. Our proposed
method then enhances the edge by shifting the mean of the two pixels populations away from
each other. This is similar to the conventional unsharp masking structure, except that the
concept is reformulated and worked in probabilistic setting. At our second stage, we use
bilateral filtering to attenuate the retained noise in the flat areas. Performance of synthetic
and real clinical B-scan US images based on several dominant image quality measures, e.g.,
signal-to-noise ratio (SNR) and contrast-to-noise-ratio (CNR). The performance is improved
over the conventional US image de-speckling methods. The CNR-SNR performance tradeoff
is also addressed here for the first time.

Our experimental results in particular show that our proposed method with bilateral filtering
gives the best performance. One of the essential contributions in this work is that we address
a new image quality tradeoff, also known as SNR-CNR dilemma, for the first time. We found
that reconstructed US images cannot share good results of both the above mentioned
measures. This tradeoff is similar to of the tradeoff mentioned earlier in W. K. Heisenberg's
Uncertainty Principle, which stated that we cannot accurately measure displacement and
momentum at the same time.

25

An Automatic System for Measuring Electrode-Skin Impedance

Prawsiri Veeranarapanich*
Advisor: Arporn Teeramongkonramee and Apiwat Lek-uthai
Chulalongkorn University, Bangkok, Thailand, e-mail: pianistpraw@hotmail.com

It is well accepted that the quality of biopotential signals such as ECG, EEG, EMG etc. is
strongly affected by the impedance at electrode-skin interface. The power-line interference
which is common mode signal in nature, could be converted into differential mode signal via
the electrode-skin impedance and electrode unbalance. One possible solution in practice is to
minimize the electrode-skin impedance by a proper skin preparation such as skin abrasion.
Thus, the study of the electrode-skin interface is one of the key factors to obtain high quality
of biopotential signals. In this article, we present an automatic system which is capable to
measure electrode-skin impedance as a function of applied frequency. Our system consists of
a programmable function generator, an isolated DAQ module, a measuring circuit and a
laptop. In our measurement, the electrode-skin interface is applied with a constant amplitude
of a sinusoidal wave and the current information is provided by our measuring circuit. A
LabVIEW program has been developed to control both amplitude and frequency of sine wave
applied to the electrode-skin interface and also to acquire impedance voltage and current
from DAQ module. Our developed system is able to vary the applied frequency ranging from
1 Hz to 10 kHz. The results indicated that the changes of electrode-skin impedance in terms
of magnitude and phase versus applied frequency agree quite well with a simple lumped-
circuit model. We also observed a relatively large data scattering of impedance in the low
frequency (~ 1 to 200 Hz range). Since the current flow in the measuring circuit is limited by
relatively high values of impedance at low frequency, this results in a low signal signal-to-
noise ratio.

26

Computer Application using ARIMA and Simulation techniques for managing
inventory in hospital

Pattranit Khobkun, Watsa Tantiyuth, and Wassachon Veerakul
Advisor: Surapong Sirikulvadhana
Chulalongkorn University, Bangkok, Thailand, e-mail: Surapong.s@chula.ac.th

This paper aims to develop a computer application for inventory management in order to
balance uncertain demand and supply effectively in hospital (Medical supply unit). Our
procedure can be divided into three main steps. First, we analyze data which consist of
historical demands and necessary parameters such as lead time and on hand which are
collected by the studied hospital. There are two different inventory policies, order when reach
s and replenish to S; (s, S) and order Q in every T period; (T, Q). Second, we forecast non-
stationary demand using Autoregressive integrated moving average (ARIMA). However,
ARIMA is an effective method for demand prediction only in short and medium periods.
Therefore, tracking signal is used to remind for keeping the accuracy of forecasting model.
Third, we find reorder point and max level for (s, S) policy as well as period and quantity for
(T, Q) policy by using the computer application based on criteria which is an acceptable
shortage level (Service level) with the lowest average inventory units. To develop the
computer application, we use MATLAB to calculate and also model ARIMA. Moreover, C#
language is used to construct the application and its interface. After that, we compare the
results with the existing planning method to show how effective of our study are. Finally, the
developed computer application cannot only be used in hospital industry but also other
industries which have non-stationary demand to improve inventory management.

27

Admission and Discharge Processes Improvement

Nopparuth lurkittikul, Tanawut Supparerkapa and Tanawat Jarusiripipat*
Advisor: Wipawee Tharmmaphornphilas
Chulalongkorn University, Bangkok, Thailand, e-mail: tanawat_sak@hotmail.com

We study admission and discharge processes in one of the biggest hospital in Thailand. An
admission process is the process to examine whether patients are ready to stay at a hospital
for at least one night to get treatments. Normally, it consists of the following sub-processes:
interview, lung x-ray, blood test, electromagnetic scan, diagnosis, and room reservation.
Since patients need to halt food intake in order to do blood test, blood test and its prior
processes should be seriously considered. Currently, 5 nurses are assigned to the interview
process based upon diseases, 3 technicians are assigned to lung x-ray, and 1 nurse is assigned
to blood test. This results in 2.5 hours to complete blood test and its prior processes. It is also
found that blood test is the current bottleneck station. We develop a simulation model for the
admission process. This helps in assigning proper resources to each process. We found that
using the current staff but transferring a nurse from the interview process to blood test can
reduce 50 minutes of the completion time. Moreover, if an extra nurse can be assigned to the
blood test station, it will reduce the completion time by 1.25 hour. However, adding other
additional nurses is not significantly reduced the completion time.

Discharge process occurs after doctors order discharge. Currently, about 50% of the patients
cannot leave a hospital by noon of the discharge day. Consequently, they need to pay for an
extra day, as well as new patients cannot check in. We study discharge processes of 4 wards
to determine the best practice. Delayed discharge is expected to be 20-30% after
implementing the standard process.

28

Design and Manufacture Argumentative Mobility Device For Osteoarthritis patients in
Thailand

Vorapraj Chutintaranond, Wongsatorn Sathitsuksanoh, Pitchaya Sovachinda and Teerinth
Changsawang
Advisor: Pairat Tangpornprasert and Chanyaphan Virulsri.
Chulalongkorn University, Bangkok, Thailand, e-mail:chanyaphan.v@gmail.com

Osteoarthritis (OA) is one of the most common chronic diseases founded in aging society. It
not only directly affects patients‘ mobility, but also causes depression due to commuting
restriction. During the twentieth century in Thailand, the proportion of elderly people
significantly increased. The proportion of men and women population over 60-year-old was
4.4% - 5.2% in 1970, 6.2% - 8.4% in 1995, 14.6% - 18% in 2025 and 22.7% and 26.9% in
2050[1]. To extend independent living and promoted their health, assistive mobility devices
have been essentially created and developed.

For the time being; there are several types of walker being exposed to commercial market as
argumentative mobility device. However, they are still lack of some significant functions
because of different environment between designed countries and Thailand where roughness
and step on the walk way are normally found. In addition; inconvenient carriage associating
with improper weight and obstructed architecture is required to be improved. Finding the best
solution on solving the mentioned situation became our project objectives.

A Hubless wheel walker provides advantageous weight and carriage compactness with
modern architecture. The wheel comprises aluminum wheel with solid tire and rotatable inner
hoops, which were fabricated by Nylon 6. The maximum capability of dynamic system
crossing step height and floor roughness is 10 centimeters. High grade aluminum was not
only used for supporting highly stressed parts on its structure but also appropriated for light
weight consideration expected lesser than a common use walker. For Folding in hubless
wheel walker was designed under concept aligning bicycle wheel circumference, so it
required radial slot mechanism on rear wheel structure and handles. Furthermore; middle
column adhered to body structure could be stretched and moved through to train entrance
way moreover it‘s also favorably utilized as seat. Consequently, a hubless wheel walker will
resolve the different environment for support and aid elderly in their daily life with high
stability and safety; besides, offer the new value on easy carriage in limited area.

29

Second Ear: A Hearing Tool for People with Hearing Disability
Pattara Sukprasert and Nuttapong Phaisarn
Advisor: Atiwong Suchato, Proadpran Punyabukkana
Chulalongkorn University, Bangkok, Thailand, e-mail: Pattara.S@Student.chula.ac.th

With more than 10% of the population in Thailand are people with disabilities, it is necessary
that new technologies are designed and developed to help with their daily life. Although
there are some technologies available, we found that most are targeted for people with visual
disabilities or the motor handicapped. For people with hearing disabilities, their difficulties
may be invisible to most. Often time, they need to have an assistant to constantly translate
spoken to sign language. Therefore, this project, ―Second Ear‖, is particularly devoted to
exploit the power of mobile technology to automatically translate spoken words into sign
language and pictures in the hope to help the deaf to communicate more easily.

This ―Second Ear‖ is an innovative solution that combine the use of Automatic Speech
Recognition (ASR), with the text-to-Sign Language algorithm, and Search algorithm. It
receives three words or syllables in Thai from any speaker through a microphone connected
to a mobile phone, then transmit it to an engine that performs all necessary functions and
returns the resulting sign language and pictures back to the phone. Naturally, the limitation of
three words will help improving the accuracy of the ASR. Though the users may have to limit
each utterance to three words or syllables, it is rather common to do so in the Thai
environment, especially among the younger generation.

This paper describes techniques employed in our research and offers results from our
experiments. The outcome of this project is quite promising and can further be developed to
reach a more natural way to help the deaf communicate better.

30

Design and Implementation of Surveillance Robot for Disabilities and Elderly

Surainan Kahmimah
Advisors: Jakapan Suaboot and Apichat Heednacram
Prince of Songkla University, Phuket, Thailand, e-mail: so-pat@hotmail.com

Robots have played important role in assisting mankind, especially surveillance tasks for
partial disabled and elderly people. These people are unable to move conveniently around
their spaces because of their physical limitations. Sometimes it is difficult for them to
visualize the environment around them without having to walk to the scene physically. If
there is a portable device that brings the real-time surveillance images to the partial disabled
users, they will respond to the near-by environment more effectively. Our proposed system
brings the live video to disabilities and elderly using low-cost surveillance robot. We apply
existing technologies and add more values by attaching the integrated camera that is
controlled via smart phone.

The system consists of two parts: a surveillance robot with rotatable spy camera; and a
remote control device for a user. The robot is made up of a radio-controlled truck available to
be purchased from a normal market. The truck carries an Arduino board, two DC motors, a
servomotor, a set of two batteries, and a surveillance camera that is used to send video signals
to the display (in this case we use a television). The communication between the robot and
the remote control is vital. Wireless LAN and mobile network were used in. Although, these
communication types offer high bandwidth and coverage, the system is complicated and the
price is high. A tiny and low batter consume radio transceiver was also used; however the
transmitter and receiver in this type of communication must use the same hardware and is not
suitable in our context. Therefore, our design is based on Bluetooth BlueDrone model that
allows many forms of inputs such as touch screen, accelerometer. The implementation uses a
smart phone with installed Android operating system and Bluetooth capability. The smart
phone acts as a remote control for a truck to move forwards, backwards, turning left and
turning right. A camera on the truck can rotate left and right which operates through the
software interface on the phone in a limited distance of 40 metres. The camera sends the live-
video images to the television, a display terminal. Our first prototype is considered low cost,
given that we can apply the devices used in a normal life (a smart phone and a television).
The RF camera, however, needs to be purchased (usually it is cheaper than IP camera).

31

Learning Causal Structures of Brain Connectivity in fMRI time series

Arnan Pongrattanakul* and Puttichai Lertkultanon*
Advisor: Jitkomut Songsiri
Chulalongkorn University, Bangkok, Thailand
e-mail: arnan.p@student.chula.ac.th, puttichai.l@student.chula.ac.th, jitkomut.s@chula.ac.th

This project presents a method for learning causal structures in a time series. Learning causal
structure is a problem of finding directional relationships between any pair of variables in a
system. In this work, we consider the brain system whose variables are functional activities
occurred in each region. The brain activities can be measured via blood oxygen levels using
the technique of functional Magnetic Resonance Imaging (fMRI). Hence, discovering causal
structures in fMRI time series becomes an important topic in brain connectivity analysis.

Our goal is to construct a multivariate autoregressive (AR) model that describes the dynamics
of blood oxygen levels in the brain by solving an estimation problem with Granger causality.
The Granger causality principle states that for any pair of variables that has no causal
relationship between them (one variable does not cause another to occur, or vice versa), the
parameters in the model corresponding to those two variables are zero. Therefore, if we
assume that each brain region has strong connectivities with only some other regions, we can
expect parameter matrices in the model to be sparse (having many zero elements). Using the
least-squares method, we will show that the problem of estimating AR models with sparse
coefficient matrices can then be formulated as a convex optimization problem.

The process of learning causal structures in fMRI time series can be described as follows:
1. Formulating the model estimation problem using a framework of convex optimization. An
l1-norm penalty function is added into cost objective function to promote sparsity in the
solution.
2. Reducing the number of variables in the system. Since the number of variables in the brain
system is in the order of ten thousands, we apply the method of principal component analysis
(PCA) to reduce the problem dimension.
3. Solving the convex optimization problem via an iterative method, namely, the alternating
direction method of multipliers (ADMM). This method is suitable for large-scale problems
and it has a desirable convergence rate in practice.
4. Selecting the best model from a candidate set containing models with various orders and
Granger causality patterns. These models are constructed by varying parameters in the
estimation problem. Our criterion is to choose a stable model that yields the lowest fitting
error.
5. Constructing a graphical model from the estimated Granger causality pattern. The
graphical model will visually depict the relationship pattern between brain regions. Hence, it
can serve as a guideline or as prior knowledge for further brain studies in neurosciences.

We verify the effectiveness of this approach on a synthetic data set and then apply the method
to fMRI time series. The estimated causal structure of brain connectivity will be discussed in
the full paper.

32

Patient and treatment scheduling in Dermatological Outpatient Department queuing
system

Hataipat Juthasri*, and Suwat Tansiriyakul
Advisor: Oran Kittithreerapronchai
Chulalongkorn University, Bangkok, Thailand, e-mail: hataipat.j@hotmail.ac.th

Because of lack of medical resources and universal access to health care institutes, Thailand
has faced the quality of health service problem. Patients have experienced a long waiting time
and a heavy congestion, especially in outpatient departments (OPD) as they arrive at the same
time. Many researchers have viewed this problem as an operational issue and applied
principles of Operations Management to reduce the average time that a patient spends while
maintaining high utilization of medical resources. This article studies the effects of patient
appointment system and centralized treatment scheduling to Dermatological OPD queue at a
private hospital using commercial simulation software. We notice that the medical care
service has unique characteristics. Medical services have 2 independent criterion to separate
patients into the system which is the medical necessity and continued therapy. As a result,
patients are separated into 3 categories, particularly emergency patient, appointed patient and
walk-in patient. Moreover, each medical resource can perform more than one purpose that
provides greater complexity in scheduling. Having analyzed the OPD, we observed that the
diagnostic time depends on doctors and language barrier. The patient who requires a
translator spends long diagnostic time. Therefore, we observed that the queue is similar to a
job shop scheduling problem with precedent constraints. As a result, we compared job-shop
queuing policies which can provide guideline on medical care queuing system.

33

Section 4

Network and Communications

An Alarm System via Social Network Services

Theeradet Khamperawat*, and Gorarit Chandhanimi
Advisor: Korporn Panyim
Department of Electrical Engineering, Faculty of Engineering, Mahidol University, Thailand,
e-mail: soul.of.spirit3@gmail.com

Alarm system has been widely used in wide-range of applications for security purposes (e.g.,
home security, fire and smoke detection system, and video surveillance system). When an
event is detected, the alarm system uses various methods to send an alarm message in order
to notify the property owner (or emergency personnel). One of the popular methods includes
sending the alarm message as a voice call to the property owner‘s mobile phone. Alternative
method includes sending a text message via SMS (Short Message Service). The limitation of
these methods is that the alarm message may not reach the property owner if his mobile
phone is turned off or he is failed to pick up the phone. As a result, it may be too late to take
an appropriate response to the incident.

The goal of this project is to look for an alternative method to deliver the alarm message to
the property owner for fast action. Recently, the social network services (e.g., Facebook,
Twitter, Instagram) have become one of the most popular tools for communications. One
interesting feature of the online social network is that the information posted is not available
only for page‘s owner, but also all the people on the page of owner‘s friend list. With some
adjustments in user‘s privacy setting, the post can also be seen publicly. The benefit is that
even though the property owner did not see the alarm message posted, there is a high chance
that Facebook friends of the property owner will see the alarm message (on the owner‘s
wall). They can inform the property owner via other channels or take an appropriate response
(e.g., call the emergency authorities) by themselves.

In this project, we develop the social network alarm system that uses the social network
services to deliver the alarm messages. The system will send the alarm signal to the property
owner‘s Facebook page. Our prototype uses a smoke detector that will detect an event of fire.
The alarm signal will be sent through Wi-Fi channel to the server that will automatically post
the alarm message on the property owner‘s Facebook wall. Note that this method can be used
as an alternative delivery mode in cooperation with voice calls or SMS messages.

35

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