Threepak, Thanunchai

Preferred name

Alternative Name

Threepak, T.

Main Affiliation

School of Engineering

thanunchai.th@kmitl.ac.th

Now showing 1 - 10 of 20

Some of the metrics are blocked by your
consent settings
Feature Selection Method Based on Correlation Tree
(2020-01-01)
Yapila, Prajak
;
Threepak, Thanunchai
Machine learning is one of techniques adapted to detect intrusion for cyber security. One of importance techniques to find anomaly is classification. But classification with huge dataset has the resources and time consumption. Feature selection is choice to reduce the data dimension to improve processing performance. In this paper, we introduce the new feature selection method that selects some fields of data set using position of each feature in correlation tree. Then, the result from the correlation tree feature selection of KDDCUP’99 data set are compared with two feature selection technique, correlation of coefficient (CC-type) and BFS by using three reference classifier, Decision Tree (DT), Random Forest (RF), and Naive Bayes (NB).
Some of the metrics are blocked by your
consent settings
GPS Data Analytics for the Assessment of Public City Bus Transportation Service Quality in Bangkok
(2023-04-01)
Chawuthai, Rathachai
;
Sumalee, Agachai
;
Threepak, Thanunchai
Evaluation of the quality of service (QoS) of public city buses is generally performed using surveys that assess attributes such as accessibility, availability, comfort, convenience, reliabilities, safety, security, etc. Each survey attribute is assessed from the subjective viewpoint of the service users. This is reliable and straightforward because the consumer is the one who accesses the bus service. However, in addition to summarizing personal feedback from humans, using data analytics has become another useful method for assessing the QoS of bus transportation. This work aims to use global positioning system (GPS) data to measure the reliability, accessibility, and availability of bus transportation services. There are three QoS scoring functions for tracking complete trips, on-path driving, and on-schedule operation. In the analytical process, GPS coordinates rounding is adopted and applied for detecting trips on each route path. After assessing the three QoS scores, it has been found that most bus routes have good operations with high scores, while some bus routes show room for improvement. Future work could use our data to create recommendations for policy makers in terms of how to improve a city’s smart mobility.
Some of the metrics are blocked by your
consent settings
Quantum cryptography via a wavelength router for internet security
(2010-11-01)
Threepak, T.
;
Mitatha, S.
;
Luangvilay, X.
;
Yupapin, P. P.
We propose a new system of quantum cryptography for internet security using Gaussian pulses propagating within a nonlinear ring resonator system, quantum processor, and a wavelength router. To increase the channel capacity and security, the multiplexer is operated incorporating a quantum processing unit via an optical multiplexer. The transmission part can be used to generate the high capacity quantum codes within the series of microring resonators and an add/drop filter. The receiver part can be communicated by using the quantum key (quantum bit, qubit) via a wavelength router and quantum processors. The reference states can be recognized by using the cloning unit, which is operated by the add/drop filter, where the communication between Alice and Bob can be performed. Results obtained have shown that the correlated photons can be generated and formed the entangled photon pair, which is allowed to form the secret key between Alice and Bob. In application, the embedded system within the computer processing unit is available for quantum computer. Furthermore, such a concept is also available for internet application via hybrid communications, for instance, wire/wireless, satellite, which can be used to form the internet security. © 2010 Wiley Periodicals, Inc.
Some of the metrics are blocked by your
consent settings
New wavelength division multiplexing bands generated by using a Gaussian pulse in a microring resonator system
(2009-12-01)
Polar, A.
;
Threepak, T.
;
Mitatha, S.
;
Bunyatnoparat, P.
;
Yupapin, P. P.
We propose a novel system that can be used to generate the new optical communication bandwidths (wavelength bands) using a Gaussian pulse propagating within a nonlinear microring resonator system. By using the wide range of the Gaussian input pulses, for instance, when the input pulses of the common lasers with center wavelengths from 400-1,400 nm are used. Results obtained have shown that more available wavelength bands from the different center wavelengths can be generated, which can be used to form new dense wavelength division multiplexing bands, whereas the use of the very high channel capacity for personal wavelength and network applications is plausible. ©2009 IEEE.
Some of the metrics are blocked by your
consent settings
Web attack detection using chromatography-like entropy analysis
(2015-01-01)
Watcharapupong, Akkradach
;
Threepak, Thanunchai
Web services are mostly attacked in various ways directly and indirectly. We calculate the Shannon entropy from web server log files, especially access logs, and then estimate the entropy distance to detect intrusions and identified them by distinct attack word lists as general, cross-site script, and SQL injection attacks. The experiment shows that our proposed chromatography-like entropy analysis method can detect and identify these behaviors.
Some of the metrics are blocked by your
consent settings
Defect detection of GPS trackers through data visualization
(2019-07-01)
Chawuthai, Rathachai
;
Threepak, Thanunchai
A Global Positioning System (GPS) tracker installed in a vehicle is commonly used to improve logistics management processes and transportation safety. All GPS trackers must send data including locations, timestamps, and speeds to a server all the time. In case of a device failure, it can be checked by incomplete data; however, a device's sensor inaccuracy, which can create negative consequences to many parties, becomes a challenging issue to detect. With this reason, this paper aims to adopt data visualization to find out the defect of GPS trackers. It has been found that some defects noticed by a visualization were reported, and providers got advantage of this result to maintain their devices.
Some of the metrics are blocked by your
consent settings
Anomaly SQL SELECT-statement detection using entropy analysis
(2014-01-01)
Threepak, Thanunchai
;
Watcharapupong, Akkradach
Database systems are often intruded because they store valuable information and can be accessed through Internet web applications which sometimes are not developed with security in mind. Attackers can inject some crafted inputs to those programs that work on database systems so that some unexpected results occur. We analyze the database system log files, focus on query statements (SQL SELECT statements), using the Shannon entropy to detect such anomaly attempts that would change conditional entropy significantly. Our experiment shows that the proposed anomaly detection using entropy analysis is effective. © 2014 Springer International Publishing Switzerland.
Some of the metrics are blocked by your
consent settings
Novel quantum-molecular transporter and networking via a wavelength router
(2010-06-01)
Threepak, T.
;
Louangvilay, X.
;
Mitatha, S.
;
Yupapin, P. P.
We propose a new system of a molecular-quantum networking using the optical tweezers, where the transportation of molecules via wavelength router and network can be performed. In addition, the molecule transportation states can be identified by using the quantum states of the transporters, which can be formed in the network. The proposed fabricated material used is InGaAsP/InP, which can provide the required output signals. The design system consists of a nonlinear microring/nanoring resonator system incorporating an add/ drop filter and a wavelength router. The transporter can be formed by the dark soliton, and the optical transporter is tuned and amplified by the bright soliton and transmitted into the network. In applications, the use of the proposed system incorporating a nanoscale communication and networking via wavelength router is available for long-distance link. © 2010 Wiley Periodicals, Inc.
Some of the metrics are blocked by your
consent settings
Dynamic pulse reshaping generation using coherent control for ultra fast switching use
(2010-07-01)
Threepak, Thanunchai
;
Mitatha, Somsak
;
Yupapin, P. P.
In this letter, we present a new technique for pulse shaping, whereas the dynamic pulse reshaping of the dark-bright soliton conversion is investigated and seen during the propagation within an add/drop filter. The dark soliton pulse is reshaped by adjusting bright soliton input, whose dispersions are adjusted to be cancelled. This technique exploits the well known property of the ultrafast pulse in which the desired output can be stored and form in the same manner of the adiabatic light pulse (cold light). This technique presents inherent advantages of fast light pulse, whereas the fast in time of 1 ns is noted. © 2010 Wiley Periodicals, Inc.
Some of the metrics are blocked by your
consent settings
Route Prediction from GPS Trajectory and Road Data
(2023-01-01)
Chawuthai, Rathachai
;
Kawachakul, Kampanart
;
Boonrod, Kittikom
;
Threepak, Thanunchai
This paper presents an approach to create a route prediction model for multiple vehicles from GPS trajectory and road data. Since the baseline model is designed for a single car and it provides low performance for our experiment, our approach using the HDBSCAN clustering for route data preprocessing and the prediction model based on Viterbi algorithm, which is an extension of the Hidden Markov Model, provides the better performance in terms of Hit@K where K being 3. The result of our work demonstrates the feasibility to improve the smart city technology under the scope of smart mobility as well. (Abstract)

Threepak, Thanunchai

Filters

Settings

Sort By

Results per page