Invited Speakers

Prof. Mamun Bin Ibne Reaz
Department of Electrical, Electronic and Systems Engineering
Universiti Kebangsaan Malaysia, Malaysia

Title of Invited Talk
Wireless Capacitive EMG Biomedical Sensor for Extramural Monitoring of Muscle Activity

Abstract of Invited Talk
An important biosignal often used in clinical diagnosis, medical treatment, and rehabilitation for patients with musculoskeletal disorders is electromyography (EMG). Conventional EMG measurements are done using contact electrodes such as needle electrode (nEMG) and surface electrode (sEMG) that require the attention of a professional medical officer throughout the tedious skin preparation and complex measurement process, limiting the efficiency of the EMG measurement and portability of the system. Recent technological developments in amplifier electronics allow the use of small capacitive EMG (cEMG) biosensor. These electrodes can measure the EMG signals without galvanic contact with the human body which overcome the limitations of the contact electrode. We are developing a cEMG biosensor that can be applied to an ambulatory monitoring system of muscle activity. The main components of the measurement system are the capacitive electrode, front-end amplifiers, pre-processing filters, a data acquisition unit, and the user interface for data storage, analysis, and monitoring. An electrical model of skin-electrode capacitance was developed and derived to determine the optimum capacitance for a cEMG biosensor. Experimental results showed that the cEMG biosensor was able to measure EMG signal accurately and achieved extremely low noise floor of less than 2 mV. This cEMG biosensor was also able to measure the EMG signal with fabric as an insulator. This cEMG biosensor was able to overcome the limitations of the contact electrodes, yielding a comparable performance to EMG signals measured by conventional wet contact electrodes which makes it ideal for ambulatory applications.

Prof. Nguyen Van Hieu
Department of Physics and Electronic Engineering
VNU-Ho Chi Minh University of Science, Vietnam

Title of Invited Talk
The effect of electrodes pattern on current spreading for the deep-ultraviolet light-emitting diodes (UVLEDs) on MOCVD technology

Abstract of Invited Talk
The UVLEDs are well-known, such as compact circuit, high efficiency, short standby, low heat generation, no mercury used and narrow spectrum. Moreover, the direct band gap of III-nitride materials will be one of the advantage of MO for the wide wavelength range of ultraviolet for UVLEDs with the huge application in life sciences. In this work, the UVLED chips with multi-quantum wells (MQWs) were designed and successfully fabricated by MOCVD technology. The results of PL mapping uvled structure indicated they obtained the uvled in the wavelength from 370 to 387nm of the deep-ultraviolet light-emitting diodes (UVLEDs) with high efficiency. Moreover, the IV measurements of uvled showed that these uvled will be emitted over 2.8VDC and the maximum current of 100mA. Moreover, there are a shift in emitting wavelength peaks around 3,94nm by the PL data. The EL intensity of these uvled chips were obtained from 14687 (uvled4) to 1620000 (a.u) which can be predicted by the disadvantage of MOCVD technology for the thickness of semiconducting layers in the wafers and the effect of electrodes pattern that will be somehow for the fabricating process of uvled.

Prof. Ngô Thanh Hoàn
School of Biomedical Engineering
International University, VNU – HCM City, Vietnam

Title of Invited Talk
AI for Health Research at the School of Biomedical Engineering, International University, Vietnam National University - Ho Chi Minh City, Vietnam

Abstract of Invited Talk
Applications of Artificial Intelligence in Healthcare are exploding, ranging from diagnosis, prognosis… to treatment planning, drug discovery… In this talk, I will give an overview about Artificial Intelligence for Health research that are happening at the School of Biomedical Engineering, International University, Vietnam National University - Ho Chi Minh City, Vietnam. Some of the topics include: (1) AI for skin disease diagnosis using smartphone captured images, (2) AI for eye disease diagnosis using fundus and OCT images, (3) AI for Alzheimer’s Disease diagnosis using MRI brain images. Furthermore, I will briefly introduce about other active research topics at my school including: telemedicine, biosensors and lab-on-a-chip, biomaterial, tissue engineering – regenerative medicine, pharmaceutical engineering research…

Prof. Thanh-Son Dao
Faculty of Environment and Natural Resources
Hochiminh City University of Technology, Vietnam

Title of Invited Talk
Single and combined effects of Di-2-ethylhexyl phthalate and Bisphenol A on life traits of the tropical micro-crustacean Ceriodaphnia cornuta

Abstract of Invited Talk
Plastics, plastic additives, and their emission have attracted significant attention and concern both socially and scientifically. Di-2-ethylhexyl phthalate (DEHP) and bisphenol A (BPA) are two of the many plastic additives widely found in aquatic environments, which can have severe impacts on aquatic animals like micro-crustaceans. Therefore, this study assessed the chronic effects of DEHP and BPA, both individually and jointly, at environmental concentrations (e.g. 50 and 500 µg/l) on the survival rate, reproduction, and growth of the tropical micro-crustacean Ceriodaphnia cornuta. We found that each of the two plastic additives, and a mixture of the two, had some influence on the survivorship of C. cornuta. While DEHP marginally enhanced the reproduction of the animals, BPA strongly inhibited it. Additionally, the mixture of DEHP and BPA caused a synergistic effect on reproduction but an antagonistic effect on the growth of C. cornuta. Both DEHP and BPA induced a significantly longer body of C. cornuta when exposed to these plastic additives. Our results showed that the tropical micro-crustacean C. cornuta is more sensitive to DEHP and BPA than the temperate micro-crustacean D. magna in relation to body length development and reproductive characteristics. Our findings enrich the knowledge of DEHP and BPA toxicity to tropical micro-crustaceans. Besides, our results are also of significant value to freshwater monitoring and environmental risk assessments of plastic additives.