Giuseppe Vendramin

Università del Salento, Lecce, Apulia, Italy

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Publications (30)7.54 Total impact

  • A. Lay-Ekuakille, G. Vendramin, A. Trotta
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    ABSTRACT: Spirometry deals with finding and predicting respiratory system pathologies through instrumentation that mainly carries out measurements on the volume and the air flow expired from lungs. In many cases, during spirometric and pneumotachographic trials in hospital, there are people who are not able to begin or to complete their tests because of diverse difficulties due to presumable pathologies. Hence, these trials may be lost if they are not recovered and postprocessed in adequately, at least to display the expiration trend and step. This paper presents rapid techniques of helping physiopathologists to extract information from a noncomplete expiration curve as spirometric postprocessing. The two techniques are based on work of breath (WOB) and controlled genetic algorithm (CGA), respectively. A comparison is performed between the two techniques; the WOB is calculated by assuming classes of fixed resistance R according to the age, to the sex, to the previous pathologies, etc., while the CGA technique provides a strict monitoring of GA steps in order to reduce uncertainty of final results.
    IEEE Sensors Journal 02/2010; · 1.85 Impact Factor
  • A. Lay-Ekuakille, G. Vendramin, A. Trotta
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    ABSTRACT: The control and managing of pipelines have been assuming a major importance for all kinds of fluids to be conveyed through. When the fluid is like oil, harmful liquid and/or water for human beings necessity, the monitoring of pipelines becomes extremely fundamental. Based on the reflexion according to fast detecting systems, spectral analysis response is a topic of interest. Among spectral analysis response techniques, fast Fourier transform (FFT) is rated. Different other techniques are utilized, but they are costly and difficult to be used. An interesting technique, used in nuclear magnetic resonance data processing, filter diagonalization method (FDM), for tackling FFT limitations, can be used, by considering the pipeline, especially complex configurations, as a vascular apparatus with arteries, veins, capillaries, etc. The thrombosis, for human vascular apparatus, that might be occur, can be considered as a leakage for the complex pipeline. The research proposes the use of FDM according to two sub techniques called algorithm I and algorithm II. The first algorithm is a direct transformation of FDM application, while the second includes robustness and a regularization technique to solve ill-posed problems that may emerge in processing data. The results are encouraging.
    IEEE Sensors Journal 12/2009; · 1.85 Impact Factor
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    ABSTRACT: Energy harvesting from human body has been undergoing an interesting and quick development thanks to the technological availability of new electronic components and the growing of different applications, in particular, for biomedical and social impacts on human beings' daily life. The main scope of this paper is to modeling and to design a thermoelectric generator that extracts energy from human tissue warmth in order to supply a biomedical hearing prosthesis for deaf persons. An array of sensors based on thermocouple effect has been used. A conditioning and accumulator circuitry has been designed and tested.
    Medical Measurements and Applications, 2009. MeMeA 2009. IEEE International Workshop on; 06/2009
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    ABSTRACT: There is a strong urge for methodologies for leak detection in pipelines and location that are quick and require less costly instrumentation. Moreover they should not cause the cessation of pipeline operation, and not require that the whole network be surveyed by trained personnel; leak detection methodologies based on transient analysis can achieve these goals. Basing the reflexion according to fast detecting systems, spectral analysis response is a topic of interest. Among spectral analysis response techniques, FFT (fast Fourier transform) and wavelets are included. Different other techniques are utilized but they are costly and difficult to be used. The research proposes the use of FFT for smaller and zigzag pipelines by overcoming limitations encountered in current scientific literature. The developed improvements, used for pipeline section small than 20 cm, permit to prevent, with interesting accuracy, the leakage.
    01/2009;
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    ABSTRACT: Kriging code is a regression method used in the context of the space analysis (geostatistics) which allows to interpolate a quantity in the space, minimizing the mean square error. In the statistics context it is better well known as Gaussian process. Knowing the value of a quantity in a few points in the space (for example the temperature taken in every town of an area), we can determine the quantity value in other points for which measurements do not exist, for example a resort of campaign unequipped of thermometer. This paper shows the study of the development of a Kriging code for the treatment of environmental and electrical parameters for photovoltaic panels. This method will be tested through a case of study realized by us.
    01/2009;
  • Aimé Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
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    ABSTRACT: Automatic detection of epileptic seizures, by means of online or offline procedures, is a matter of continuous research that commits many research groups. Electroencephalographic (EEG) detection is affected by interference due to specific electrode interference that can be removed by different techniques, namely, beamforming, proposed in this paper. This technique allows improving epilepsy identification technique without performing a precise selecting of higher-order spectra. This is an expanded version of a paper presented at the 3rd IEEE International Workshop on Medical Measurements and Applications, 9 10 May 2008, Ottawa, ON, Canada.
    IJAMC. 01/2009; 3:110-125.
  • Aimé Lay-Ekuakille, Amerigo Trotta, Giuseppe Vendramin
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    ABSTRACT: Leak detection and control for pipelines is an important aspect for managing economic key issues, namely, saving water in urban water distribution network, protecting oil pipelines and allowing a correct conveying of harmful and toxic fluids. Basing the reflexion according to fast detecting systems, spectral analysis response is a topic of interest. Among spectral analysis response techniques, FFT (Fast Fourier Transform) is rated. Different other techniques are utilized but they are costly and difficult to be used. The research proposes the use of FFT for smaller pipelines by overcoming limitations encountered in current scientific literature. The developed improvements, used for pipeline section small than 20 cm, permit to detect and to prevent leaks with less accuracy, the leakage.
    Conference Record - IEEE Instrumentation and Measurement Technology Conference 01/2009;
  • Aimé Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
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    ABSTRACT: An efficient and portable photoacoustic multi-gas monitor for biomedical application is needed in hospital in order to detect indoor gas pollution, r to protect the health of workers, patients and visitors. If the highest precision is not required, especially for continuous monitoring of anaesthetic gases, a LED-based (light emitting diode) detecting system can be employed in order to estimate an attention threshold level of gas. This paper illustrates a design and characterization of a led-based photoacoustic chamber (sensing-actuating system and cell) for anaesthetic gas detection. A measurement campaign has been conducted in a surgery room; the results have been compared with another photoacoustic instrumentation used simultaneously. The main asset of the new system is a double source of LED light instead of a more traditional system.
    Sensors and Actuators B Chemical 01/2009; · 3.84 Impact Factor
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    ABSTRACT: Water is an essential good for human being necessity. It must be protected against pollution and useless leakage. Urban waterworks is a strategic infrastructure to be managed with particular attention and care so that users must be satisfied. Different techniques are used to detect leaks from waterworks, specifically from pipelines carrying water. Among them, spectral analysis is very interesting to apply amid problems related to the pipeline section. This paper presents an application of STFT (short-term Fourier transform) technique for identifying urban waterworks leaks; STFT technique is usually used in processing speech. For the purposes of this research, a specific pipeline plant has been build in other to feature a real case. The pipeline section is almost one inch; the adopted section makes the research very interesting since spectral analysis, based essentially on FFT, is generally used for section greater than 20 cm.
    01/2009;
  • Aimé Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
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    ABSTRACT: Pipeline monitoring plays a key role in many industrial processes and human activities, in particular, for the management of water resources. Spectral analysis response, used for leak detection, is generally based on fast Fourier transform (FFT). The aim of this paper is to develop an alternative method based on filter diagonalization method (FDM), mainly used in nuclear magnetic resonance, in order to overcome limitations of FFT approach. Thanks to its robustness, FDM allows difficulties created by zigzag pipeline, buried water tubes and in general by the presence of noisily boundary conditions to be solved. Moreover, another objective is reached by reducing FFT recovery error for narrow pipelines. An experimental facility has been constructed to show the results of this alternative approach.
    Measurement. 01/2009; 42(3):358-367.
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    ABSTRACT: The recognition of contours, colors and movements, with absolute precision and less uncertainty, is essential for surgeon. In order to guarantee the maximum visual force it is important the illuminating parameters could be perfectly adapted to current operating room conditions. While surgery fields of reduced dimensions require as much light, surgical interventions that take place in the deep cavities of human body and are characterized by surgery fields of higher dimensions, require extended light beams and high illumination. The current types of traditional advanced and smart scialitic lamp produce high level of uncertainty because of their illuminating quality and shadows. Consequently, surgeon is obliged not to be absent-minded during operation because of uncertainty. This paper describes a novel LED-based scialitic lamp for operating rooms designed and build in order to be capable of reducing uncertainty that has been evaluated by taking into account different parameters. Since LED technology is recent and, its application in surgery is a matter of continuous researches, it is not easy to determine the impact of uncertainty on surgery field, that, is the available space through which surgeon can operate.
    Advanced methods for uncertainty estimation in measurement, 2008. amuem 2008. ieee international workshop on; 08/2008
  • A. Lay-Ekuakille, A. Trotta, G. Vendramin
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    ABSTRACT: Beamforming is one of the ultimate opportunity to improve distance systems in order to detect punctual and widespread obstacles. Distance ranging for mobile and fixed systems, namely, cars, vehicles, vessels and airplanes, is a key issue for nowadays demands. Distance between cars and from obstacles can be established and measured using laser and ultrasound. Cloudy and foggy conditions are utmost requirements for testing distance ranging facilities. If based on ultrasound, they can be easily integrated by a sophisticated on-board software in order to perform new features. This paper introduces interesting aspects of defining new requirements for an acoustic imaging capable of reconstructing obstacle features by targeting it using a special array of sensors.
    Instrumentation and Measurement Technology Conference Proceedings, 2008. IMTC 2008. IEEE; 06/2008
  • A. Lay-Ekuakille, A. Trotta, G. Vendramin
    [Show abstract] [Hide abstract]
    ABSTRACT: An efficient and portable photoacoustic multi-gas monitor for biomedical application is needed in hospital in order to protect the health of workers, patients and, somewhat, visitors. If highest precision is not required, especially for continuous monitoring of anaesthetic gases, a LED (light emitting diode) based-detecting system can be employed in order to estimate an attention threshold level of gas. But when a gas purification facility is used in order to exhaust biomedical gas present in a surgery room, it can be suitable to employ a different sensing technology to reduce costs and to increase efficiency, since the quality and the quantity of gases decrease, a new affordable instrumentation based on LED technology is proposed in the present research. The idea behind this work is to control LED sources by a cheaper system in other to get acceptable results that are valid for an interesting range of frequencies. Particular care has been given to conditioning subsystem because of mixing RGB colours.
    Instrumentation and Measurement Technology Conference Proceedings, 2008. IMTC 2008. IEEE; 06/2008
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    ABSTRACT: EEG signals reveal interesting information about human being's cerebral activity. Nowadays information contents can help physicians especially in rehabilitation operations, that is, it is possible to design specific biomedical experimentation in order to help patients to retrieve acceptable and good conditions of their physical apparatus or specific areas of them. In this paper, preliminary criteria of designing and implementing an EEG classification are proposed. A modeling of classification rules is also described.
    Medical Measurements and Applications, 2008. MeMeA 2008. IEEE International Workshop on; 06/2008
  • Aime Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
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    ABSTRACT: There is an increasing demand for giving energetic autonomy to portable and autonomous biomedical devices used not only by patients but common people who need to use the aforementioned devices. For instance, hearing aids, in order to be used for long time, must be connected to re-chargeable batteries in order to help people in case of lack of permanent electric sources. In particular, for audio-prosthesis, it is very interesting to extract electric energy from temperature or articulation movements. This paper presents some criteria of designing a conditioning and re-charging unit in order to convert human basal warmth to electric energy for audio-prosthesis; the system is based on PIC microcontroller that allows the managing of two temperatures: internal and external.
    Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 02/2008; 2008:2310-3.
  • Source
    Aimé Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
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    ABSTRACT: Lighting consumes one fourth of all energy consumed worldwide, and case studies have shown that commonly 50 to 90 percents of building lighting is unnecessary for the purposes required. Energy is wasted when light does not fall on its intended target, as when lighting fixtures allow light to go up instead of (as it is generally preferred) downward. Leakage also occurs when more light is generated than needed. Many governments are looking for ways to reduce energy use after signing the Kyoto Protocol, and individuals, organizations and local authorities are increasingly improving lighting efficiency in order to reduce energy consumption. The main scope of this paper is to establish some criteria in designing a sensing and signal conditioning system for energy saving in public lighting.
    01/2008;
  • A. Lay-Ekuakille, G. Vendramin, A. Trotta
    [Show abstract] [Hide abstract]
    ABSTRACT: Spirometry takes care to find and to predict respiratory system pathologies through instrumentation that mainly carries out measurements on the volume and the air flow expired from lungs. A complete spirometric instrumentation composed of three parts has been developed. The first part, ldquohardwarerdquo, gains a sampled signal from a sensor of the flow-time curve and sends it to the computer. The second part, ldquosoftwarerdquo, processes received data calculating the volume-time curve, the flow-volume curve and other main spirometric parameters, displaying the result of prediction. The last part, ldquoa genetic algorithmrdquo, trains itself on the base of a series of computing with real data, to produce spirometric parameters of a most likely pathologic curve and, to predict pathology type with less possible tests.
    01/2008;
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    ABSTRACT: The aim of this paper is to illustrate the possibility of recovering electrical energy from human body with micro and macro movements. Micro movements are from breath while macro movements are from hands and/or foot. Their combination can represent, in terms of quantity, an interesting availability to supply biomedical autonomous apparatuses and devices. The choice of integrating these kinds of movements will help patients or persons to recover energy, e.g. from breath while they are seated. Consequently, a correct modeling is requested to optimize the energy converter for supplying the biomedical autonomous systems. In human beings, when each breath process is completed, the lung still contains a volume of air, called the functional residual capacity (approximately 2200 mL). The current research shows the usefulness of a correct modeling, hence a correct converter. The paper allows to determine the minimum mechanical energy necessary to get an interesting level of electrical energy.
    01/2008;
  • A. Lay-Ekuakille, G. Vendramin, A. Trotta
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    ABSTRACT: New severe requirements of measurements of anaesthetic gaseous components oblige to be accurate in evaluating concentrations in hospital facilities, especially in surgical pavilions. Exposure to anaesthetic gases in the health sector, whether in the operating room, recovery room, or in the context of outpatient clinics, may entail a health risk for the personnel exposed. Although health care workers are exposed to much lower anaesthetic concentrations than the patients, this exposure often extends over many years. Personnel often indicates fatigue and headaches, especially when occupational hygiene conditions are inadequate. The decisive factors as concerns, the adverse health effects of exposure to anaesthetic gases, are mainly the type of gases used, the length of exposure, and the gas concentrations. This paper aims to describe an alternative procedure of calibrating a photoacoustic instrumentation by extracting signal from acoustic sensors, that are microphones. The alternative procedure is based upon Frost beamformer algorithm preceded by a smoothing thanks to Savitsky-Golay method. A comparison has been performed using the same alternative procedure but by substituting Frost beamformer with a notch filter.
    01/2008;
  • Aimé Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
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    ABSTRACT: Electronic component improvements allow everyone to use them for performing new features in different applications. Lidar signal control is matter of continuous design and it can be studied in order to increase signal-to-noise ratio. Fortunately, the advent, of programmable gain amplifiers, switching capacitor filters and specific AD converters, is the stimulus of improving lidar signal quality. The main scope of this paper is to design and to realize a hardware simulator capable of reproducing the behavior of lidar signal control. This paper aims at describing the results of an automatic control system for Raman lidar signals. The system is based on the following units: laser source, damper, PMT (Photomultiplier), current - to - voltage converter, switched capacitor filter, programmable gain amplifier, A/D converter and FIR filter. This configuration allows the use of FIR filter that is not strictly necessary but it can help in adapting signal according to the amplitude. One of the main advantage of this system is to obtain a flexible and programmable board.
    Proc SPIE 01/2008;