The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we identify feasibility of energy harvesting using parametric amplification phenomenon of piezoelectric bimorph cantilevers for bladder pressure sensing. We simply fabricated piezoelectric bimorph cantilevers by bonding 110 µm thick polyvinylidene fluoride (PVDF) and 500 µm thick polycarbonate (PC) using an epoxy. The piezoelectric bimorph cantilever was 34.8 mm long, 10 mm wide, and...
Parkinson's disease (PD) was described by James Parkinson first time and it is now recognized as the second common neurological disorder after Alzheimer. Since most of the people with PD suffer form speech disorder, it is believed that speech analysis can be considered as the easiest way for PD detection. In this research, we try to use extracted features by genetic algorithm and ANFC for classifying...
This study proposes a piezoelectric polyvinylidene fluoride (PVDF) patch for detecting the movement of the biceps brachii muscle. The polyurethane (PU) elastomer was chosen to perform as an artificial muscle. The PVDF patch rigidly glued onto the stretching PU strip could generate the charge linearly with its applied force. The large strain of 1–4 % of the PU at a low driving voltage has led to the...
The effects of LED light at 635 nm in fibroblast and osteoblast were investigate in fundamental changes as preliminary experiment. In this study, primary gum fibroblast cells and osteoblast cell line were cultured. After LED light irradiation, we found that fibroblast growth rate and cell proliferation are increased after irradiated by 630nm LED light. Optimum energy for wound healing is 0.34 J/cm...
Pulsed electric field (PEF) application development substantially affected the development of research process including controlling cell functions by using pulses of electrical fields to create pores through a cellular membrane causes cell lysis and apoptosis commonly known as electroporation or electrofusion. Here we demonstrate the influence of the PEF on the threshold area (TA) of human cervical...
This study presents the hemodialysis unit device that can effectively separate waste urea from the human blood. This device is composed of donor and acceptor channels separated by a membrane. The mixture of albumin, urea, and glucose used to replace simple human blood is fractionated by different particle sizes and diffusion distances across the cross section of the channels. In this study, FEM simulation...
Background EEG power effects of a cumulative dose of alcohol were investigated as subjects drank three glasses of alcoholic, 1 h apart. Subjects completed a task battery composed of digit span tests, 3 min each of eyes-open and eyes-closed resting EEG, and two blocks of an auditory N-back working memory task for measuring brain function of different segmental features in monosyllabic Thai words. The...
Polymers and polymer composites are one of the most interested biomaterials to replace the using of metals and ceramics. The main advantages of the polymer are that they are easier to custom made and they are bioresorbable. Their mechanical properties are unmatched when considered to replace metals or ceramics. A photocurable poly(lactic acid) (PLA) resin was developed in our laboratory for use as...
Electrocardiogram (ECG) has been actively proposed as aliveness biometric. In this paper, the study which concern to a realistic application is proposed. Firstly, a single lead normal ECG signal is acquired from individuals of 10 subjects. Then, each single beat ECG is segmented and analyzed in Continuous Wavelet Transform (CWT) domain. Total energy of wavelet coefficients for each P, QRS, and T segment...
During left ventricular support by rotary blood pumps (RBPs), pump speed plays an important role in the amount of heart support. The reducing of pump speed seems important in order to prevent some adverse events in the heart valve. However, when pump speed was reduced, the backflow which is the flow that has the reverse direction to blood pumping direction may occur more easily. This is due to the...
Nowadays, microscopic is used in several laboratories for detect cells or parasite by technician. Especially testing in urine sediment is important for the patients who are abnormal about urinary tract. Constantly, the appearance of red blood cells, white blood cells, crystals, bacteria and other microorganisms in urine sediment's patients is more important information for diagnosis. This paper proposes...
The parasympathetic nervous function in obstructive sleep apnea syndrome (OSAS) patients were quantified by using the respiratory sinus arrhythmia (RSA) impulse response magnitude. Ten participants were recruited and classified into three groups; mild (four participants), moderate (four participants) and severe (two participants) groups. Autoregressive with exogenous input (ARX) model was used to...
The intra-aortic balloon pump (IABP) is a mechanical device to be useful in assisting the heart failure patients. The computer simulation of the cardiovascular system with intra-aortic balloon pump has been not only used for research but also improved and deployed for teaching therapeutic technique and diagnostic procedures. This study is showed the mathematical model of cardiovascular with assisting...
Therapeutic hypothermia is recommended as a cardiac arrest treatment for neuroprotection. In this study, we aimed to explore nonlinear heart rate variability (HRV) with other domains to clearify and setting up the significant index for survival. All patients were divided into two groups by 7 days survival outcome (n = 9 vs. 9). The limb lead II ECG signals are collected (10 minutes, sampling rate:...
The objective of this research was to design and construct of the low - cost defibrillator analyzer. This research has adopted the principle of voltage divider and standard calibration curves of the relationship between the set of standard output energy, the standard maximum voltage and the standard maximum current versus the digital output of them. The designed and constructed the low - cost defibrillator...
The detection of thyroid stimulating hormone (TSH) is critical for disease early intervention and the prevention of pandemics. However the low detection sensitivity and the high cost limit further application of TSH biosensor. In order to improve the sensitivity and reduce the cost, interdigitated microelectrodes (IDμE) biosensor was prepared for the sensitive and low cost detection of TSH. The IDμE...
This paper presents two methods for reducing complexity of dynamic receive beamforming in order to be implemented on a single field-programmable gate array (FPGA) with 500K gates. These methods apply windows to divide each scanline into segments and each segment has its own focus at the center. One method uses constant window size and the other applies dynamic window size that equalizes the off-focus...
Endoscopy is a medical device used for examining organs or treating affected areas in side of body. However, there is the possibility a chance of infection by viruses and bacteria due to the direct contact with the mucous membrane and blood, so it is required high-intensive disinfection in order to prevent secondary infection. The conventional cleansers are inefficient and complicated to use because...
For trans-femoral (TF) amputee, the prosthetic knee component performs important roles to assist the motion of prosthetic leg during gait. Even though the variety prosthetic knee component can perform variety functions, the stair ascending gait still be the challenge mode of gait for TF amputee as the unexpected environmental had to be faced daily. This study is aiming to establish the design of the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.