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IEEE MELECON 2020
MELECON 2020 - 3.5

Technical Session

IEEE Mediterranean Eletrotechnical Conference 2020

IEEE MELECON 2020

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Session 3.5 - Biotechnolgies: Advanced Devices and Sensors

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PRESENTATIONS
SESSION DETAILS

KEYNOTE TRACK 3 - Developing and application of electronic noses in health care

Andreas Voss - Ernst-Abbe-Hochschule

PRESENTATION

KEYNOTE TRACK 3 - Developing and application of electronic noses in health care

ABSTRACT

In recent decades, improvements in materials, sensors, electronics and signal processing technologies have led to a rapid increase in the development and application of electronic noses (eNoses). Among the available gas sensing methods, semiconducting metal oxide gas sensors (SMOS) devices have several unique advantages, such as low cost, small size, easy measurement, durability, ease of fabrication and low detection limits (ppm level). In addition, most SMOS-based sensors are more durable and somewhat resistant to poisoning. For these reasons, they have quickly gained popularity and have become the most widely used gas sensors today. Electronic nasal systems are used among others in the food and pharmaceutical industry and also in the military. Recently eNoses have been developed for medical applications. eNoses can distinguish between different types of diseases and their severity by analyzing body odor. Especially disease-related metabolic changes, but also any kind of drug consumption can be detected on the skin surface and/or exhaled breath. We were able to show that such eNoses can be successfully used to improve the diagnosis of various diseases ranging from kidney disease to various types of carcinoma and heart disease. These and other international studies provide evidence that, after a necessary validation, a cost-effective, portable and fast working eNose system could be useful for improved diagnostics and health protection.

Silicon dosimeters based on Floating Gate Sensor: design, implementation and characterization

Cristiano Calligaro - RedCat Devices, Italy

PRESENTATION

Silicon dosimeters based on Floating Gate Sensor: design, implementation and characterization

ABSTRACT

A rad-hard monolithic dosimeter has been implemented and characterized in a standard 180 nm CMOS technology. The radiation sensor (C-sensor) is based on a Floating Gate (FG) MOS discharge principle. The output current is processed by a current-to-voltage (I/V) interface and then converted by a 5-bit flash ADC. The dosimeter is re-usable (FG can be recharged) and can detect a dose up to 1krad (Si) with a resolution of 30rad (Si) typical over temperature 0 to 85°C range. The ADC allows easy further signal processing for calibration and averaging, etc. The power consumption of C-sensor plus I/V interface is < 2mW from a 5 V power supply. The overall layout area is less than 0.25mm2. The Radiation-Hardened-By-Design (RHBD) approach guarantees that the absorbed dose does not degrade the circuitry.

Fogging effect correction of Gafchromic HD-V2 film response for its use in high-dose radiotherapy

Elio Tomarchio - University of Palermo, Italy

PRESENTATION

Fogging effect correction of Gafchromic HD-V2 film response for its use in high-dose radiotherapy

ABSTRACT

GAFChromic® HD-V2 film is a reliable dose measurement device, thin, flexible, inexpensive, simple to use and easy to analyze. The response in terms of net absorbance with respect to absorbed dose was found to be linear in a large dose range, which supports the feasibility of using the film dosimeters in many applications, such as radiotherapy. For its use, a "fogging" effect must be take into account since film response changes with time. To determine a calibration curve valid for any time, fogging effect was investigated for more than 400 days. A correction procedure allows the use of HD-V2 film dosimeters in high-dose radiotheraphy, as brachytherapy, and quality assurance (QA) procedures.

A Highly-Configurable Full-Field Stimulus Source for Electroretinography

Giulia Crocioni - Politecnico di Milano, Italy

PRESENTATION

A Highly-Configurable Full-Field Stimulus Source for Electroretinography

ABSTRACT

The electroretinogram (ERG) is a functional test widely used in clinical practice to help diagnose diseases of the retina and optic nerve. In fact, it measures the electrical response to a light stimulus of retinal cells, and different ERG tests can be used to probe different retinal areas and cells. The stimulators most commonly used in visual electrophysiology are Ganzfeld stimulators, spherical devices used to perform full-field ERG, and flat monitors, which are not suited for the detection of peripheral early disfunctions, since they do not probe the entire human visual field. Clinical stimulators can use different technologies, but light emitting diodes (LEDs) are becoming very popular since they are almost ideal light sources. Recently, a three dimensional stimulus source based on LEDs able to perform peripheral pattern ERG (ppERG) has been developed. In this paper, a highly-configurable full-field stimulus source for electroretinography based on LEDs is presented. It is capable of presenting an arbitrary pattern of pixels to the entire visual field of a test subject, thus bringing together the functionalities of the existing stimulators. The pattern of pixels is configurable to present stimuli for multiple ERG protocols to any arbitrary sector of the visual field, giving also the possibility to use different colours. The device structure was designed in order to obtain uniform luminance stimuli and minimal light reflection. Moreover, programming and control of the device was widely explored, with a special focus on the development of an electronic design flexible enough to allow the implementation of different ERG protocols. Luminance uniformity of the device was analysed, obtaining satisfactory results. Considering the colour channel of greatest interest for pattern ERG (pERG) protocol, the contrast between black and white checks was much higher than the minimum 80% required by the standards. Finally, the prototyped device was able to elicit consistent flicker ERG and full-field ERG responses in a healthy volunteer subject.

Study on ANN based Upper Limb Exoskeleton

Monica Leba - Universitatea din Petrosani, Romania

PRESENTATION

Study on ANN based Upper Limb Exoskeleton

ABSTRACT

This paper analyzes the case of designing an exoskeleton for people with right arm mobility impairments. The type of exoskeleton considered consists of three joints, one of translation along the spine and two of rotation for the arm of the exoskeleton. The first approach presented is for the people who have the intention to move at the level of the muscles, which can be detected with the help of non-invasive EMG sensors, but cannot sustain the movement for a long time. In this approach within the control system there are two components. The first is computational only, which includes the Denavit-Hartenberg models: direct for the human arm and inverted for the exoskeleton. The second component is an ANN-based estimator that estimates the arm's movement angle based on the acquired EMG signals. The second approach presented in the paper is for people who cannot voluntarily perform the arm movement. For this case, an exoskeleton control system was designed based on the training of an ANN to associate the EMG signals collected from muscle groups controllable by the subject with exoskeleton movements.

Ascorbic Acid determination using linear sweep voltammetry on flexible electrode modified with gold nanoparticles and reduced graphene oxide

Francesca Mazzara - Università degli Studi di Palermo, Italy

PRESENTATION

Ascorbic Acid determination using linear sweep voltammetry on flexible electrode modified with gold nanoparticles and reduced graphene oxide

ABSTRACT

Indium tin oxide (ITO) coated on flexible polyethylene terephthalate (PET) substrate electrode was modified with reduced graphene oxide and gold nanoparticles by simple co-electrodeposition performed at -0.8V vs SCE for 200 s. All samples were characterized by electron scan microscopy. The as prepared electrode was used as electrochemical sensor to selective detection of ascorbic acid using linear sweep voltammetry. Excellent results were obtained in a linear range from 20 to 150 μM of ascorbic acid with a limit of detection of about 3.1 μM (S/N=3.3). The sensors have a reproducibility of about 5.5% and also show high selectivity towards different interferents such as chlorine, calcium, magnesium, sulphate ions, sodium and glucose. Ascorbic acid was detected also in milk samples demonstrating the possibility quantify this analyte in real samples with a very cheap method.

SESSION CHAIRS

Almir Badnjević

Burch University Sarajevo, Bosnia and Herzegovina

e-BADGE

Steffen Leonhardt

RWTH Aachen University, Germany

e-BADGE

Technical Session

IEEE Mediterranean Eletrotechnical Conference 2020

IEEE MELECON 2020

Session 3.5 - Biotechnolgies: Advanced Devices and Sensors

KEYNOTE TRACK 3 - Developing and application of electronic noses in health care

Silicon dosimeters based on Floating Gate Sensor: design, implementation and characterization

Fogging effect correction of Gafchromic HD-V2 film response for its use in high-dose radiotherapy

A Highly-Configurable Full-Field Stimulus Source for Electroretinography

Study on ANN based Upper Limb Exoskeleton

Ascorbic Acid determination using linear sweep voltammetry on flexible electrode modified with gold nanoparticles and reduced graphene oxide

SESSION CHAIRS

Almir Badnjević

Steffen Leonhardt