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The Classification of EEG-based Wink Signals: A CWT-Transfer Learning Pipeline
Jothi Letchumy Mahendra Kumar,Mamunur Rashid,Rabiu Muazu Musa,Mohd Azraai Mohd Razman,Norizam Sulaiman,Rozita Jailani,Anwar P.P. Abdul Majeed 한국통신학회 2021 ICT Express Vol.7 No.4
Brain–Computer Interface technology plays a vital role in facilitating post-stroke patients’ ability to carry out their daily activities of living. The extraction of features and the classification of electroencephalogram (EEG) signals are pertinent parts in enabling such a system. This research investigates the efficacy of Transfer Learning models namely ResNet50 V2, ResNet101 V2, and ResNet152 V2 in extracting features from CWT converted wink-based EEG signals, prior to its classification via a fine-tuned Support Vector Machine (SVM) classifier. It was shown that ResNet152 V2-SVM pipeline could achieve an excellent accuracy on all train, test and validation datasets.
Regulating Mitochondrial Biogenesis: from Herbal Remedies to Phytomedicine for Cancer Prevention
Jothy, Subramanion L,Vijayarathna, Soundararajan,Chen, Yeng,Kanwar, Jagat R.,Sasidharan, Sreenivasan Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.17
Jothi Saravanan Thiyagarajan,Di Su,Hirofumi Tanaka,Boyu Zhao,Tomonori Nagayama 국제구조공학회 2021 Smart Structures and Systems, An International Jou Vol.27 No.2
Condition monitoring of railway tracks is essential in guaranteeing the running safety of railways. Track profiles are the primary source of external excitation for a train system. While Track Recording Vehicle is often utilized for maintenance purposes, this particular vehicle is expensive and difficult to use for small railway operators. Therefore, track profile estimation through in-service vehicle response measurements, which potentially provides efficient and frequent measurement, has been studied. However, the quantitative evaluation of the vertical and lateral track profile irregularities is still challenging as the inverse analysis solutions are sometimes inaccurate and even unstable. In this paper, numerical analyses are first carried out to evaluate track profiles from acceleration and angular velocity responses measured on a train car body. For the inverse analysis, an Augmented State Kalman Filter is utilized to solve the problem using 4 degrees of freedom observable train models. The sensor installation locations are investigated through observability rank condition analysis with different measurement layout. Secondly, a field experiment is carried out in a local Japanese in-service railway network to estimate track profile from car body motions. Smartphones are utilized for the field test measurements as prevalent sensing devices. The effectiveness of the proposed approach is demonstrated with the observable train model. Numerical analyses and field experiments clarify the proposed track profile estimation’s capability using only one on-board sensing device.
Jothi S. Thiyagarajan,Dionysius M. Siringoringo,Samten Wangchuk,Yozo Fujino 국제구조공학회 2021 Smart Structures and Systems, An International Jou Vol.27 No.2
Damages on lights and utility poles mounted on the elevated highway or railway bridges were observed in the past several large earthquakes. The damages could have serious consequences to public safety, travelling vehicles or trains, and nearby properties. A previous study shows that the damages were caused by buckling and yielding of the pole due to excessive response amplification during large earthquake. Such amplification occurs when the bridge's natural frequency is close to the light pole's fundamental frequency. An investigation of the seismic performance of existing light pole mounted on elevated highway bridges is needed to avoid the response amplification. This includes the identification of the light pole's natural frequency and damping ratio. Vibration testing of the light pole using conventional contact sensors individually would require enormous effort and is time-consuming. Moreover, such vibration testing on a highway bridge deck would require traffic disruption to provide access. Video camera-based non-contact vision sensing is seen as a promising alternative to the conventional contact sensors for this purpose. The objective of this paper is to explore the use of non-contact vision sensing for operational modal analysis of light pole on highway viaduct. The phase-based video motion magnification method is implemented to obtain the light pole response in an ambient condition. Using this method, small and invisible displacement is magnified for a certain range of frequency of interest. Based on the magnified video frames, structural displacement is extracted using the image processing technique. The natural frequency and damping ratio of the light pole are estimated using the random decrement technique. The method is verified in a laboratory-scale experiment and implemented to practical field measurements of a light pole on a highway viaduct in Kanagawa, Japan. The results are compared with measurement by Laser Doppler Vibrometer. Both experiments suggest that the method could effectively obtain the natural frequency and damping ratio of the structures under the ambient condition where vibration amplitudes are very small and invisible with reasonable accuracy.
V. Jothi,Akeem Yusuf Adesina,A. Madhan Kumar,J. S. Nirmal Ram 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.11
This study aims to evaluate the influence of dicarboxylic acids (oxalic, malonic and succinic acid) used in anodizationbath on the surface and corrosion resistant performance of anodized films on AA2024 aerospace grade alloys. The surfacemorphology, topography, composition and structure of anodized samples were examined by scanning electron microscopy,optical profilometer, X-ray diffraction and attenuated total reflectance-infrared techniques. Characterization results revealedthe effect of dicarboxylic acids addition on the anodized film’s surface with important changes. X-ray Photoelectron Spectroscopicanalysis confirmed the presence of carboxylic groups on the porous anodized layer processed in anodization bathcontaining succinic acid. The electrochemical corrosion tests specified a solid relationship between the corrosion resistanceand the surface microstructure of the anodized layer processed in different dicarboxylic acids.
Herbal Remedies for Combating Irradiation: a Green Anti-irradiation Approach
Lachumy, Subramanion Jothy,Oon, Chern Ein,Deivanai, Subramanian,Saravanan, Dharmaraj,Vijayarathna, Soundararajan,Choong, Yee Siew,Yeng, Chen,Latha, Lachimanan Yoga,Sasidharan, Sreenivasan Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.10
Plants play important roles in human life not only as suppliers of oxygen but also as a fundamental resource to sustain the human race on this earthly plane. Plants also play a major role in our nutrition by converting energy from the sun during photosynthesis. In addition, plants have been used extensively in traditional medicine since time immemorial. Information in the biomedical literature has indicated that many natural herbs have been investigated for their efficacy against lethal irradiation. Pharmacological studies by various groups of investigators have shown that natural herbs possess significant radioprotective activity. In view of the immense medicinal importance of natural product based radioprotective agents, this review aims at compiling all currently available information on radioprotective agents from medicinal plants and herbs, especially the evaluation methods and mechanisms of action. In this review we particularly emphasize on ethnomedicinal uses, botany, phytochemistry, mechanisms of action and toxicology. We also describe modern techniques for evaluating herbal samples as radioprotective agents. The usage of herbal remedies for combating lethal irradiation is a green anti-irradiation approach for the betterment of human beings without high cost, side effects and toxicity.