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This article presents grounded inductance simulator using single current controlled current follower transconductance amplifier (CCCFTA) as active element. The simulated inductance value can be controlled electronically by adjusting the bias current of the CCCFTA. The grounded inductance simulator comprises one CCCFTA and one grounded capacitor without any external resistors and component matching...
The research aimed to present airflow analysis of radiofrequency ablation for asthma therapy by using three-dimensional finite element method. We study a solution for asthma therapy by using radiofrequency ablation method. Airflow is main factor for asthma therapy. Asthma patients have shortness of breath, coughing, wheezing, and chest tightness that influence a daily life of patients. All symptoms...
Valvular heart disease is considered as an important problem of heart. The mechanical heart valve replacement is one of the methods used to treat valvular heart disease. There are many designs of mechanical heart valves including bileaflet and trileaflet valves. As the heart valve operates under the blood pressure conditions, it might be damaged or impaired. We aimed to design a trileaflet mechanical...
A pain is a human phenomenon when sensory receptors are stimulated by the injury. It can be caused from accident or intention. Everybody have this kind of sensation because the pain is a natural warning for react in order to protect a whole body. However, the reaction from the pain sometimes have to be avoid because the overreaction causes some damages to near-by tissue. An acute thermal pain is one...
Fluorescence anisotropy of GFP molecules, suspended in solution and immobilized on a glass substrate, was measured to investigate the application for nano-environment probe. Nano-environment around living cell is of interest in relation with wide range of fields, such as cell interaction in cancer tissue, nerve signal transmission and so on. However, nano-environment is so sensitive to the interference...
Rotary blood pumps are increasingly used for supporting blood circulation in heart failure patients. For the simulation of an abstract model of a cardiovascular system, a computer simulation which is a lumped parameter model can be used. Computer simulations are essential in mathematical modeling to estimate the hemodynamic parameters. In this research, a computer model is implemented to study the...
Microcontact printing (μCP) has been developed about 17 years ago and it is an outstanding surface patterning technique in micron scale and, even in nanoscale. Surface science communities like engineers and biologists have been promoting attention in μCP; therefore they have been rich in improvement to the μCP process itself. However, in order to aim at minimizing some drawbacks of μCP such as a parameter...
Medical image compression is necessary to store the huge database in Medical Centres and medical data transfer for the purpose of diagnosis. This paper attempts to improve the higher peak signal to noise ratio (PSNR) by using the system error compensation (SEC) method. The SEC design is based on quantization and curvelet transform (CT) decomposes the system error (E) to six scales. Only the scale...
This paper focuses on developing a novel approach for measuring body joint angles, mainly the knee angles, for surface electrical stimulator system. In this work, we only focus on the sensing mechanism for measuring the knee joint angle using wearable sensors. Our system consists of multiple flex-sensors mounted on a supportive cloth and microelectromechanical systems (MEMS) vibratory gyroscope. In...
It is demonstrated that cell culture can be printed into flexible polymer substrates for bio-sensor making by flexographic, utilizing a PDMS stamp. And addition multiple micro-scale fine solid line was successfully printed as fundamental work toward development of micron scale and low cost mass production of UHF passive RFID sensor for biomedical such monitoring the movement of healing limbs, to warn...
This paper presents an algorithm in reversible watermarking or lossless data hiding, the application associated with the quick response codes (or call QR codes) and the biomedical images. QR code is random patterns, looks like random noise which can be commonly found on the webpages. We can use the smartphone camera to capture the QR code at the webpage, and then the hyperlink corresponding to the...
Immersive virtual environment in multiple large flat-screened influences simulator sickness to the subjects is different from the other non-immersive virtual environment as one-large projection screen, monitor screen, and head mounted display. This system provides an immersive experience in two different positions as the “driver” and the “passenger”. Therefore, this research study parallax, position,...
Electroporation is a process of the biophysical effect on cells exposed to an external electrical field is gaining applications in medical treatments, especially to create pores through a cell membrane and allow uptake of DNA into a cell. Therefore, in the theoretical evaluation of electroporation, transmembrane potential and characteristics of the cells growth is the target of the analysis. In this...
This paper proposes a robust method to detect involuntary blinks for visual display terminal (VDT) users using Web camera, even if the Web-camera's frame rate dynamically changes and becomes slow. Conventional methods which are widely used for drivers and paralyzed person with higher-performance camera, calculates correlation between an open eye template and cureent eye image at each frame, and judge...
Normally, there have been many methods to diagnosis of flat foot. Each method is different to use indicators e.g. Staheli arch index, Clark's angle and Chippaux-Smirak index. However, the results from such indicators are still varied in each method. Therefore, this paper proposes a classification of the flat foot by combining of multiple indicators with neural network process. It can improve an accuracy...
Complexity of autonomic regulation affects the systemic vascular, but little is known about its influence on cerebrovascular regulation. In this study, we examine the complexity of neuromodulation by frequency and nonlinear heart rate variability (HRV) to cerebral reserve function during cerebrovascular reactivity (CVR) by breath holding induced - hypercapnia and subsequently, cerebral vasodilatation...
Using nanorobots for medical diagnostics and treatment has been an intriguing idea since the concept of nanotechnology was introduced. This study investigated the control mechanism for locomotion of nanorobots in blood vessel repair application. Each nanorobot operating as artificial platelets has only essential characteristics for self-assembling into a mass at the injured blood vessel wall to reduce...
Computational fluid dynamic (CFD) model is used to evaluate cardiovascular hemodynamics and the model is useful to predict the blood flow pattern and the wall shear stress (WSS) in various conditions. This study used the CFD model to assessment the influence of varied blood conditions and geometries on changing of velocity ratio at the internal carotid artery (ICA) and the external carotid artery...
We have designed and investigated the system of upper limbs rehabilitation. The measurement parameters in the system are Electromyography (EMG), the angle of arm, and weight. These parameters are useful as an indication of rehabilitation performance in terms of both quantity and quality. The performance of the proposed system is evaluated with CPM training on triceps and infraspinatus muscles, which...
We have developed a straightforward optics system for lab on chip applications. This system can be used to handle a continuous micro fluid flow, submicron and nano-sized particles. The device that is investigated under this system can be used to fields such as bioseparation, biosensors for diagnostic and prognostic purposes. In our advance, the system is formed for dielectrophoretic (DEP) colloidal...
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