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Solid polymer electrolytes (SPEs) play a pivotal role in advancing electrochemical devices, such as proton batteries and supercapacitors, owing to their potential for enhancing safety and flexibility. In this work, employs a solution casting technique to prepare SPEs, utilizing chitosan‐dextran blends as the polymer matrix. Ammonium thiocyanate (NH4SCN) is incorporated as a charge carrier, while honey...
The paper elaborates on the correlation analysis between the proposed EEG sub-band spectral centroid amplitude with the established band power features. The study involves recording of resting EEG from 40 healthy university students. Initially, the EEG is pre-processed for noise removal and filtered into delta, theta, alpha and beta waves using band-pass filters. Next, the sub-band power spectral...
This paper presents the application of Discriminant Function Analysis (DFA) of stroke brainwave for ischemic stroke group level discrimination. The Relative Power Ratio (RPR) of stroke brainwave has been selected as an input for DFA. There were 100 subjects from National Stroke Association of Malaysia (NASAM), Petaling Jaya, Selangor, Malaysia divided into Advance Group (AG), Intermediate Group (IG)...
The paper discusses on the effects of Hamming and equiripple filters in the extraction of EEG sub-band spectral centroid frequencies. A total of 40 healthy male subjects have participated in the study. EEG signal sub-bands were filtered using Hamming and equiripple filters with similar frequency response characteristics. It has been observed that the mean difference and variance is very small for...
It has been a long debate on conventional psychometric test as benchmark of individual's intelligence quotient (IQ). However, recent studies in a variety of neurophysiological researches have been done to link intelligence with individual's brainwave pattern. Hence this paper proposes an intelligent approach to classify IQ via brainwave sub-band power ratio and artificial neural network (ANN). Fifty...
Cardiac arrhythmias refer to abnormal electrical activity of the heart which results in irregular heartbeat. This paper proposes a computerized method in detecting cardiac arrhythmias using a structurally optimized hybrid multilayered perceptron (HMLP) network. ECG samples in bipolar limb lead orientations have been obtained from PTB Diagnostic ECG database for healthy, cardiomyopathy, as well as...
EEG brainwave asymmetry gives information on which brain hemisphere is activated during certain cognitive brain function. In this study, Power Asymmetry Ratio (PAR) is computed from the Power Spectral Density (PSD) of the EEG signal. PAR is used to observe the difference brainwave power between left and right hemisphere after being exposed to mobile phone Radiofrequency (RF) radiation. 95 subjects...
Cardiac arrhythmia refers to any abnormal electrical activity in the heart that causes irregular heartbeat. Under clinical settings, the arrhythmias can be monitored non-invasively using the electrocardiogram (ECG). Although reliable, the method is still prone to error due to its dependence on visual interpretation. This paper proposes a computerized method for recognition of cardiac arrhythmia using...
The paper describes a robust approach to model cardiac arrhythmias using the hybrid multilayered perceptron (HMLP) network. Healthy, cardiomyopathy, as well as left and right bundle branch block electrocardiograms (ECG) was obtained from the PTB Diagnostic ECG database. The signals were initially pre-processed for noise removal and baseline correction. 24 morphological descriptors from the bipolar...
Sub-band spectral centroid (SC) has been widely applied in audio and speech processing field. This paper highlights the SC feature as a new approach to evaluate human intelligence quotient (IQ). The study focuses on resting EEG of the left brain hemisphere. The SC feature is derived from Discrete Fourier Transform (DFT) of electroencephalogram (EEG) signals. Sub-band SCs are obtained for delta, theta,...
Cardiomyopathy is a progressive disease that affects the muscular walls of the heart. The resultant hypertrophic condition of the cardiac chambers alters the capability of the heart to contract which will then lead to deterioration of cardiac output. The abnormality can manifest itself in the form of an arrhythmic signal detectable by electrocardiogram (ECG). Hence, this paper proposes the hybrid...
This paper discusses on the brainwave sub-band characteristics for different intelligence groups based on electroencephalogram (EEG) power ratio technique. The EEG datasets have been collected from 50 healthy subjects for two sessions; at relaxed, closed eye (CE) state as reference and at cognitively-stimulated state. In the stimulated state, subjects need to answer the intelligence quotient (IQ)...
Deterioration of structure and function of heart muscle is indicative of a degenerative disease known as cardiomyopathy. As a result, the hypertrophic condition of the heart often revealed itself in the form of abnormal sinus rhythm that can be detected via an electrocardiogram (ECG). In order to reduce the risk of misinterpretation by cardiologists, a variety of computational methods have been suggested...
Cardiomyopathy refers to gradual weakening of the muscular walls of the cardiac chambers. Due to the hypertrophic condition of the muscular walls, damage and stretching of the muscle may lead to arrhythmias, which is detectable using the ECG. In the past, any deviations from a healthy rhythm provide cardiologists with accurate information regarding the heart condition. However, cardiologists are prone...
Electrocardiogram is an electrical representation of heart activities that provide vital information on the cardiac condition. Development of reliable intelligent systems through analysis of cardiac rhythms has been paramount for automated classification of cardiac diseases. Bundle branch block is an arrhythmia caused by defects in the conduction pathways that alters the flow and speed of electrical...
Wireless power transmission is defined as a process of transferring energy from a energy source to an electrical load via wireless connection. The method is suitable in conditions where energy transfer is required, but wiring connections are hazardous, inconvenient, or impossible. RF technique can be considered as among the most feasible wireless approach. As the most important element in any RF system,...
Development of automated and accurate techniques for ECG recognition is important for diagnosis of heart diseases. Arrhythmic signals occur due to the disturbances to the rate, regularity, nodes and conduction path of the electrical impulses. Bundle branch block arises from defects of the conduction pathways involving blockage of electrical impulses through the bundle branches. This paper investigates...
Wireless power transmission is a process that takes place in any system where electrical energy is transmitted from a power source to an electrical load without a wired connection. Wireless transmission is ideal in cases where instantaneous or continuous energy transfer is needed, but interconnecting wires are inconvenient, hazardous, or impossible. Antenna has become the most vital element in any...
Electrical steel is a key material for power apparatus in electric home appliances, industrial machinery and transport equipment. Specifically, they are used as cores in transformers, generators and motors, efficiently converting magnetic energy into electricity. The magnetic properties of steel laminations need to be precisely estimated in order to design an accurate electrical machine. In this study,...
A light yellow amorphous solid (compound A̲, 760 mg) was isolated from a silica column chromatography of the crude methanolic leaves extract of Vitex trifolia. It gave a thin layer chromatographic spot (TLC; Rf = 0.80 in chloroform: methanol = 80∶20). Compound ̲ was visible under short UV light and appeared orange under long UV light. Here, the chemical structure for ̲ is proposed. In agreement with...
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