Pomsathit, Auttapon

Preferred name

Pomsathit, Auttapon

Alternative Name

Pomsathit, A.

Main Affiliation

School of Engineering

auttapon.po@kmitl.ac.th

Now showing 1 - 10 of 12

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Variable step-size algorithm for lattice form structure adaptive IIR notch filter
(2006-12-01)
Pomsathit, A.
;
Wattanaluk, P.
;
Sangaroon, O.
;
Benjangkaprasert, C.
In this paper, a new class of a variable step-size algorithm for a second-order lattice form structure adaptive IIR notch filter for detection of sinusoids in noise environments is presented. The proposed algorithm is adjusting two variable coefficients of the adaptive IIR notch filter : one is variable notch frequency and the other is variable notch bandwidth. By the proposed method, the optimization of the coefficients of the filter is obtained. The computer simulation results are shown that the proposed algorithm provides fast convergence speed, low mean square error, low variance of filter coefficients and high impulsive noise robustness. Moreover, to verify the new adaptive algorithm by application to reducing 50-Hz interference in ECG signal. As results, it is evident that the new algorithm gives a good performance. © 2006 IEEE.
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Analysis of Cybersecurity Vulnerabilities in Maritime GNSS Systems
(2024-01-01)
Chinnarong, Thirawat
;
Pomsathit, Auttapon
;
Yongsiriwit, Karn
The maritime industry is increasingly dependent on Global Navigation Satellite Systems (GNSS) such as GPS, GLONASS, BeiDou, and Galileo for navigation and operational efficiency. However, these systems are vulnerable to cyber threats like spoofing and jamming, which can severely disrupt maritime operations by misleading navigation systems [1], [2]. This study analyzes the cybersecurity vulnerabilities of GNSS systems used in maritime environments, utilizing a Software-Defined Radio (SDR) to simulate GNSS spoofing attacks on various maritime GNSS receivers [3]. The findings reveal that all tested receivers are susceptible to spoofing attacks, underscoring the need for enhanced cybersecurity measures [4]. The study advocates for the development of advanced detection systems, improved signal authentication, and adherence to cybersecurity guidelines provided by organizations such as INTERTANKO and the International Maritime Organization (IMO) [5], [6]. The proposed strategies aim to mitigate the risks associated with GNSS vulnerabilities and ensure the safety and security of maritime operations.
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Microstrip line coupled triangular slot antenna
(2002-01-01)
Anantrasirichai, N.
;
Pomsathit, A.
;
Benjangkaprasert, C.
;
Wakabayashi, T.
This paper describes the triangular slot antenna in the ground plane of the microstrip line. The slot antenna coupled by microstrip line are proposed, and the characteristics of input impedance, S parameter and far field patterns of radiation are obtained by using the finite difference time domain (FDTD) method.
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Overcoming Concept Drift and Catastrophic Forgetting: Designing and Evaluating Deep Learning Architectures for Behavioral Malware Detection using Sysmon Data
(2025-01-01)
Thaibkhuang, Surapit
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Laungwilawan, Sorawit
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Pomsathit, Auttapon
;
Ruangdech, Suppanat
;
Pongpisutsopa, Suchittra
In dynamic cybersecurity environments, traditional signature-based malware detection systems struggle to identify novel threats due to their reliance on static patterns. This study proposes a deep learning-based approach for behavioral malware detection using Sysmon logs, addressing two critical challenges: concept drift and catastrophic forgetting. The main contribution lies in a comprehensive comparative evaluation of four neural architectures CNN-only, CNN-BiLSTM with and without attention were evaluated alongside two continual learning strategies: fine-tuning and rehearsal. Experimental results demonstrate that fine-tuning enhances adaptability to new threats but severely degrades performance on previously learned data. In contrast, rehearsal-based incremental learning effectively mitigates forgetting while maintaining high detection accuracy across evolving datasets. Hybrid models incorporating attention mechanisms showed superior robustness. These findings underscore the importance of combining suitable neural architectures with continual learning techniques to build resilient and adaptive Endpoint Detection and Response (EDR) systems capable of handling real-world malware evolution. Future work includes collecting comprehensive real-world behavioral datasets, applying advanced continual learning strategies and exploring Graph Neural Networks or Transformers to improve detection robustness and adaptability.
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Evaluation of Machine Learning Techniques for Denial-of-Service Attack Detection in Digital Information Exchange
(2026-01-01)
Suwimol, Piyapol
;
Chimmanee, Krishna
;
Pomsathit, Auttapon
Anomaly detection plays a critical role in mitigating cybersecurity threats, particularly Distributed Denial of Service (DDoS) attacks. This study evaluates the performance of tree-based and ensemble learning models, including Decision Tree, Random Forest, and XGBoost, for classifying Snort log data, alongside the application of Isolation Forest for time-series anomaly detection. The experiments were conducted using ICMP-based Ping Flood attacks in a controlled network environment, with data collected from Snort intrusion detection system logs. The classification results indicate that XGBoost achieved the highest performance, with 99.81% accuracy, 99.93% precision, 99.65% recall, and 99.79% F1-score under a 70–30 train-test split. Random Forest and Decision Tree also demonstrated strong performance, while Logistic Regression showed lower effectiveness due to its limitations in modeling nonlinear patterns. For anomaly detection, Isolation Forest was applied to time-series data collected over a 19-day period. The model detected 93 anomaly points, of which 41 overlapped with Wireshark-confirmed events. However, a false positive rate of 41.67% was observed, indicating the need for parameter tuning to balance detection sensitivity and operational efficiency. Overall, the findings demonstrate that ensemble-based learning approaches, particularly XGBoost, are effective for detecting DDoS-related patterns within the experimental setting. However, the results are limited to ICMP-based attack scenarios in a controlled environment. Further validation, including cross-validation, multi-attack evaluation, and deployment-level performance analysis, is required to assess generalizability and practical applicability.
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Circularly polarized right angle slot antennas for WLAN of IEEE 802.11b/g
(2008-12-01)
Pomsathit, A.
;
Benjangkaprasert, C.
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Anantrasirichai, N.
;
Chutchavong, V.
;
Wakabayashi, T.
In this paper, the design consideration for right-hand (clockwise) and left-hand (counterclockwise) circularly polarized microstrip slot antennas are presented. The circularly polarized antenna consists of two right angle slot antennas that is two orthogonal modes in phase quadrature or an array of linearly polarized slot with proper orientations and phases. This antenna can generate circular polarization by radiating orthogonal field components from two slots with equal amplitude but in phase quadrature. Two orientations for circularly polarized are investigated in this paper from simulation and measurement results are shown at resonance frequency 2.45 GHz on return loss, VSWR and radiation patterns.I © 2008 IEEE.
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Denial of Service Attack Detection in Digital Information Exchange by Using ML Techniques
(2024-01-01)
Suwimol, Piyapol
;
Pomsathit, Auttapon
;
Chimmanee, Krishna
Denial of Service attack detection plays a significant role in the field of digital information exchange security, and log messages recording detailed system runtime information has become an important data analysis object accordingly. To improve traditional detection technology, several anomaly detection mechanisms, particularly the machine learning method, have been presented in recent years. This research proposes a technique for detecting anomalies in web log files that uses two machine learning algorithms. Isolation Forest is used to generate a set of features targeting traditional, while XGBoost is a tree-based model used for classification. The experimental data comes from the real web server for digital information exchange environment where log files have been collected, which contain many true intrusion messages. After comparing with two types of machine learning algorithms used in anomaly detection, testing results for this data set indicate that this system has a greater detection accuracy and can detect unknown anomaly data.
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Performance analysis of space diversity for OFDM transmission
(2008-12-01)
Lorphichian, Aekkarat
;
Pomsathit, Auttapon
;
Nakasuwan, Jintana
;
Srikalsin, Thanupong
;
Benjangkaprasert, Chawalit
This paper presents a simple space diversity scheme for orthogonal frequency-division multiplexing (OFDM) transmission. Using multiple antenna technology provides the same diversity order as maximal-ratio receiver combining (MRRC). It is also shown that the scheme may easily be generalized to M transmit antennas and M receive antennas to provide a diversity order of 2M. We examine feasibility of several types of OFDM transmitter diversity techniques and generate data for the third-generation wireless systems. In particular, single input single output (SISO), single input multiple output (SIMO), multiple input single output (MISO), and multiple input multiple output (MIMO) techniques are compared. We employ the long range AWGN channel to enable transmitter diversity.
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Performance analysis of channel effective for wireless LAN and wireless ad-hoc networks
(2008-12-01)
Pomsathit, Auttapon
;
Nakasuwan, Jintana
;
Lorphichian, Aekkarat
;
Benjangkaprasert, Chawalit
Wireless local area networks (WLANs) provide mobility and convenience to users, the efficiency of today's WLANs are still far from satisfactory. In this paper discusses the performance of WLANs and wireless Ad-Hoc networks, our main contribution is analyze several methods to compare the throughput performance on simulation and experimental results. We describe NS-2 (Network Simulation) implementations for fine-tuning WLAN and wireless Ad-Hoc network parameters such as the physical layer (IEEE802.ll) datalink layer (MAC) and network layer (Routing Protocol) related parameters. Customizing these parameters oppose to using the values specified in the standards will increase throughput and channel utilization under fixed load conditions.
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Design of right angle slot antenna for dual band and dual polarized with wireless network
(2010-12-01)
Pomsathit, A.
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Benjangkaprasert, C.
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Anantrasirichai, N.
;
Rakluea, Paitoon
;
Wakabayashi, T.
A novel compact and light weight antenna for dual band and dual polarized right angle slot antenna fed by micorstrip line use in wireless network technology is designed. The antenna composed of three right angle slot radiators on a same ground plane. Two right angle slots in the same size are arranged for circularly polarized at frequency 4.95 GHz and the other one is designed for linearly polarized at frequency 2.45 GHz. Therefore, in order to achieve dual band and dual polarized with good matching, the technique of arrangement is recommended. The simulation results of return loss, VSWR, gain, axial ratio, and radiation patterns are shown at resonant frequency 2.45 GHz and 4.95 GHz. ©ICROS.

Pomsathit, Auttapon

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