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ALFREDO DE LEO

Pubblicazioni

ALFREDO DE LEO

 

65 pubblicazioni classificate nel seguente modo:

Nr. doc. Classificazioni
39 4 Contributo in Atti di Convegno (Proceeding)
16 1 Contributo su Rivista
7 2 Contributo in Volume
2 6 Brevetti
1 8 Tesi di dottorato
Anno Risorsa
2018 Measurement of the 100 MHz EMF radiation in vivo effects on zebrafish D. rerio embryonic development: A multidisciplinary study
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Autore/i: Piccinetti, Chiara Carla; De Leo, Alfredo; Cosoli, Gloria; Scalise, Lorenzo; Randazzo, Basilio; Cerri, Graziano; Olivotto, Ike
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/254029 Collegamento a IRIS

2018 A Charge Distribution Based Model for the Evaluation of an Air-Coil Stray Capacitance
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
Autore/i: DE LEO, Alfredo; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: In this letter, an analytical model to calculate the global stray capacitance of a coil, and consequently the mutual capacitance among turns, is presented. The model is based on the charge distribution induced on each winding when a voltage generator feeds the coil, calculating the voltage distribution along the coil. Experimental measurements validate the proposed model and point out some critical aspects of the indirect measurement of the stray capacitance.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/260760 Collegamento a IRIS

2018 An Electromagnetic Sensor Prototype to Assist Visually Impaired and Blind People in Autonomous Walking
IEEE SENSORS JOURNAL
Autore/i: Cardillo, E.; Di Mattia, V.; Manfredi, G.; Russo, P.; De Leo, A.; Caddemi, A.; Cerri, G.
Classificazione: 1 Contributo su Rivista
Abstract: The feasibility of an electromagnetic sensor to assist the autonomous walking of visually impaired and blind users is demonstrated in this paper. It is known that people affected by visual diseases usually walk assisted by some supports, among which the white cane is the most common. Our idea consists in applying a microwave radar on the traditional white cane making aware the user about the presence of an obstacle in a wider and safer range. Compared to the already existing Electronic Travel Aids devices, the proposed system exhibits better performance, noise tolerance and reduced dimensions. In the following, the latest developments of this research activity are presented, with special concern for the miniaturization of circuit board and antennas. A laboratory prototype has been designed and realized and the first test results of obstacle detection are hereby shown to demonstrate the effectiveness of the system
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/252607 Collegamento a IRIS

2018 The Human Body Modelled by Canonical Geometric Shapes for the Analysis of Scattered E-fields
APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL
Autore/i: Manfredi, G.; Di Mattia, V.; Russo, P.; De Leo, A.; Cerri, G.
Classificazione: 1 Contributo su Rivista
Abstract: The objective of this paper is to propose a simplified model of a human body to be used in electromagnetic problems involving high frequency field scattering. Canonical geometric shapes, analytically described, represent the body. The accuracy of the model was tested comparing the field scattered by the simplified body representation with the one scattered by a more realistic phantom. At first, the influence of anatomical details of the body was analysed, comparing the electromagnetic field reflected by a realistic human head with the backscattering of spheres and of an ellipsoid. A second test concerns the human body, modelled by sphere, parallelepiped and cylinders. In this case, the possibility of reconstructing a wideband pulse scattered by the whole body with the superposition of pulses scattered by its separated parts was demonstrated. Both analyses were carried out in the frequency range 3- 5 GHz using a full wave numerical simulator.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/259473 Collegamento a IRIS

2018 Experimental Comparison Between Source Stirring and Mechanical Stirring in a Reverberation Chamber by Analyzing the Antenna Transmission Coefficient
2018 International Symposium and exhibition on Electromagnetic Compatibility - EMC EUROPE 2018
Autore/i: De Leo, A.; Cerri, G.; Russo, P.; Mariani Primiani, V.
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this paper the result of a wide set of measurements based on scattering parameters, performed on a novel type of reverberation chamber are presented. Two stirring actions are considered: the first one is the traditional mechanical stirring, obtained by rotating a Z-folded metallic paddle; the second technique is realized by inserting two of monopoles into the chamber's wall and subsequently varying their position, so changing the electromagnetic field configuration inside the cavity. A statistical analysis of the scattering parameters is reported, so the chamber is characterized by a wide set of parameters.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/261993 Collegamento a IRIS

2018 Experimental Validation of an Analytical Model for the Design of Source-Stirred Chambers
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
Autore/i: DE LEO, Alfredo; Cerri, Graziano; Russo, Paola; MARIANI PRIMIANI, Valter
Classificazione: 1 Contributo su Rivista
Abstract: A low-frequency experimental characterization of a multiple monopole-source-stirred reverberation chamber is presented and the results are compared to the prediction of an analytical model. At first quality factor was determined, then the statistic of the received power and Rician K-factor as well as the electric field uniformity and anisotropy. All the experimental results are in good agreement with the prediction of the analytical model, demonstrating its accuracy in designing a source-stirring chamber.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/251696 Collegamento a IRIS

2018 Radar Doppler technique to estimate the energy expenditure of human physical activities
IET Conference Publications
Autore/i: Russo, P.; Di Mattia, V.; Manfredi, G.; De Leo, A.; Cerri, G.
Editore: Institution of Engineering and Technology
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The estimation of activity-related energy expenditure during a day is an important parameter to be calculated and monitored, especially in Ambient Assisted Living application for elders. In fact, scientific evidences exist that a sedentary life has serious physiological and heart implications. Many are the compact and wearable measuring devices currently available, such as pedometers and accelerometers. Anyway, in the view of Ambient Assisted Living application, contactless and no-collaborative systems are to be preferred. For this reason, in this paper an alternative approach for activity-related energy expenditure calculation based on an electromagnetic contactless motion sensor is proposed. The velocity and kinetic energy associated to a moving target are calculated from the elaboration of spectrogram intensity. The method has been firstly validated with a well-known movement, i.e. the swinging of a physical pendulum, and then tested with a human subject moving his arm, with very promising results. © Institution of Engineering and Technology.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/263930 Collegamento a IRIS

2018 PERFORMANCES ESTIMATION AND MEASUREMENT OF A SOURCE STIRRED REVERBERATION CHAMBER
PROCEEDINGS OF THE XXII RINEM
Autore/i: DE LEO, Alfredo; Cerri, Graziano; Russo, Paola; MARIANI PRIMIANI, Valter
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this paper, the performances of a source stirred reverberation chamber in considered: in particular, the multiple monopoles stirring technique was considered. An array of antennas was placed onto chambers’ walls and they were fed in two at time and changing the fed pair also the electromagnetic field configuration varies, so achieving the properties of uniformity, randomness and isotropy that allows to use the chamber as the measurement environment for an immunity test according to the standard EN6 1000-4-12, 2011. The performances of the chamber based on source stirring technique were compared to the most traditional stirring technique, the mechanical stirring obtained by a rotating paddle. This comparison was made by analyzing the result of numerical simulations, compared to the statistical analysis of a wide set of measurements.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266644 Collegamento a IRIS

2017 An electromagnetic sensor for the autonomous running of visually impaired and blind athletes (Part II: The wearable device)
SENSORS
Autore/i: Pieralisi, Marco; Di Mattia, Valentina; Petrini, Valerio; De Leo, Alfredo; Manfredi, Giovanni; Russo, Paola; Scalise, Lorenzo; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: Currently, the availability of technology developed to increase the autonomy of visually impaired athletes during sports is limited. The research proposed in this paper (Part I and Part II) focuses on the realization of an electromagnetic system that can guide a blind runner along a race track without the need for a sighted guide. In general, the system is composed of a transmitting unit (widely described in Part I) and a receiving unit, whose components and main features are described in this paper. Special attention is paid to the definition of an electromagnetic model able to faithfully represent the physical mechanisms of interaction between the two units, as well as between the receiving magnetic sensor and the body of the user wearing the device. This theoretical approach allows for an estimation of the signals to be detected, and guides the design of a suitable signal processing board. This technology has been realized, patented, and tested with a blind volunteer with successful results and this paper presents interesting suggestions for further improvements.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/245870 Collegamento a IRIS

2017 An electromagnetic contactless system for respiration monitoring: a survey of research activity in Ancona
Proceedings of the International Workshop on Analysis of Biometric parameters to detect relationship between stress and sleep quality (AnBiPa 2016)
Autore/i: Di Mattia, Valentina; Petrini, Valerio; Manfredi, Giovanni; alfredo De Leo; Russo, Paola; Cerri, Graziano; Scalise, Lorenzo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/249527 Collegamento a IRIS

2017 Low-Frequency Theoretical Analysis of a Source-Stirred Reverberation Chamber
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
Autore/i: DE LEO, Alfredo; MARIANI PRIMIANI, Valter; Russo, Paola; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: Theoretical analysis of a reverberation chamber excited through the source-stirring technique at low frequency is presented. A complete analytical solution returns quickly the electromagnetic field inside the chamber thanks to an efficient computation technique for the slowly convergent triple series. The stirring function is accomplished by 62 monopole antennas, irregularly distributed on the chamber walls, and subsequently, fed two at a time for a total of 1891 combinations. At first, the empty chamber is characterized, as usually it is done for any test site and then a receiving loop is considered in the chamber working volume to simulate a device under test (DUT) and the induced voltage is studied in terms of amplitude and phase. The analytical approach allows to account for all mutual couplings between transmitting antennas and the receiving structure through the computation of all self and mutual impedances. We demonstrate that the contribution of chamber irrotational modes cannot be neglected in the computation of both antenna input impedance and DUT-induced voltage. The present study highlights the capability of source stirring to change the field amplitude and orientation in the undermoded condition. This advantage takes also benefit from the use of an out-of-phase feeding for each pair of active antennas, achieving a higher DUT-induced voltage.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/239310 Collegamento a IRIS

2017 Theoretical model for remote heartbeat detection using radiofrequency waves
Lecture Notes in Electrical Engineering
Autore/i: Di Mattia, V; Manfredi, G.; Baldini, M.; Petrini, V.; Scalise, L.; Russo, P.; De Leo, A.; Cerri, G.
Editore: Springer Verlag
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/248212 Collegamento a IRIS

2017 Numerical analysis of a reverberation chamber: Comparison between mechanical and source stirring techniques
2017 International Symposium on Electromagnetic Compatibility - EMC EUROPE 2017
Autore/i: De Leo, A.; Primiani, V. Mariani; Russo, P.; Cerri, G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/252509 Collegamento a IRIS

2017 Contactless monitoring of respiratory activity using electromagnetic waves for ambient assisted living framework: feasibility study and prototype realization.
Human Monitoring, Smart Health and Assisted Living: Techniques and technologies
Autore/i: Petrini, V.; Di Mattia, V.; De Leo, A.; Scalise, L.; Russo, P.; Manfredi, G.; Cerri, G
Editore: Healthcare Technologies
Classificazione: 2 Contributo in Volume
Abstract: Respiratory rate is a vital parameter of primary importance in medicine, sport/fitness and wellness in general, especially for most vulnerable categories of people like children and elderly people. Contactless determination of breathing activity provides a powerful and essential mean for evaluating this parameter in subjects who cannot accommodate physical sensors on their bodies. In hospital such subjects may be intensive care patients, prematurely born children and hosts of burn units. Moreover, also for long-term measurements of healthy people, for example, an elder living in home alone or in a care centre, invasive systems prove to be uncomfortable and annoying. Even for a night-time diagnosis of respiratory sleep disorders, like apnoea and hypopnoea, they demonstrate to interfere with the sleep regularity. Therefore, in the last decades many electronic devices have been conceived and realized to detect such an important parameter along with different branches of physics: strain gauges, ultrasounds, optics, thermometry, etc. This chapter presents the theoretical studies, the design and realization of a standalone Electromagnetic (EM) system for contactless determination of breathing frequency and subject's activity. Two major EM solutions are already known in the literature, continuous wave (CW) systems, and ultra-wideband (UWB) systems. The first evaluates the Doppler effect caused by the chest displacement during breathing at a single frequency, and the other one is a radar that detects the body motion by measuring the time shifts of sequential pulses.An intermediate solution thatjoins the advantages ofboth and overcomes their drawbacks is proposed. Through the use of a frequency sweep, in fact, it is possible to retrieve the equivalent information that UWB pulses are able to give, yet keeping the same contained hardware complexity of a CW system. At the same time, the proposed system proves to be robust and insensible to environmental changes. The theoretical studies have aimed at the demonstration that the solution under study helps in avoiding the blind frequencies that affect CW systems, because of sensitivity issues that depend on the variability of the reflection coefficient from the frequency and, as proved, from the harmonic content of the monitored motion. Supported by such theoretical studies, the preliminary tests are performed using laboratory instrumentation (a VNA and a commercial double ridge antenna) for a thorough campaign of measurements on assorted frequency bands, both in a controlled environment (anechoic angle) and in a concrete house, that inherently clutter the received signal. The second step involves the design and realization of a custom antenna, to be used in place of the double ridge and operating in a narrower band, which has demonstrated the same reliability of the commercial one. It has been verified in different conditions that the proposed system is able to detect both the position of the subject (i.e. distance from the antenna) and his breathing frequency, without any need for collaboration from the subject under measure. The final activity is the realization of a prototype of the device that implements the algorithms that have been studied. It is worth to highlight that the proposed system can be profitably adopted for Ambient Assisted Living framework, since it is not invasive and does not infringe the privacy of the end user, and yet it provides many valuable information about the subject's health status.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/255908 Collegamento a IRIS

2017 An Electromagnetic Sensor for the Autonomous Running of Visually Impaired and Blind Athletes (Part I: The Fixed Infrastructure)
SENSORS
Autore/i: Pieralisi, Marco; DI MATTIA, Valentina; Petrini, Valerio; DE LEO, Alfredo; Manfredi, Giovanni; Russo, Paola; Scalise, Lorenzo; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: Sport is one of the best ways to promote the social integration of people affected by physical disability, because it helps them to increase their self-esteem by facing difficulties and overcoming their disabilities. Nowadays, a large number of sports can be easily played by visually impaired and blind athletes without any special supports, but, there are some disciplines that require the presence of a sighted guide. In this work, the attention will be focused on marathons, during which athletes with visual disorders have to be linked to the sighted guide by means of a non-stretchable elbow tether, with an evident reduction of their performance and autonomy. In this context, this paper presents a fixed electromagnetic infrastructure to equip a standard running racetrack in order to help a blind athlete to safely run without the presence of a sighted guide. The athlete runs inside an invisible hallway, just wearing a light and a comfortable sensor unit. The patented system has been homemade, designed, realized and finally tested by a blind Paralympic marathon champion with encouraging results and interesting suggestions for technical improvements. In this paper (Part I), the transmitting unit, whose main task is to generate the two magnetic fields that delimit the safe hallway, is presented and discussed.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/245627 Collegamento a IRIS

2016 Optimization techniques for source stirred reverberation chambers
International Symposium on Electromagnetic Compatibility - EMC EUROPE 2016
Autore/i: De Leo, Alfredo; Russo, Paola; Cerri, Graziano; Mariani Primiani, Valter
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The aim of this paper is to propose optimization techniques for source stirred reverberation chambers. In particular, the stirring function is accomplished by 62 monopole antennas distributed on the chamber walls, and subsequently fed two at a time for a total of 1891 combinations. At first it is shown how an irregular placement of the antenna increases the chamber performances. Subsequently, an optimization algorithm based on the cumulative distribution function (CDF) is presented and the obtained results are evaluated in terms of statistical uniformity. Finally, the analytical formulation for the correlation matrix of the electromagnetic fields distribution due to all the couples of monopoles is introduced. Combining these two techniques, it is possible to reduce the number of the fed antenna pairs and improving the chamber performances.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240756 Collegamento a IRIS

2016 A feasibility study of a compact radar system for autonomous walking of blind people
Proceedings 2016 IEEE 2nd International Forum on Research and Technologies for Society and Industry Leveraging a better tomorrow (RTSI),
Autore/i: Di Mattia, Valentina; Manfredi, Giovanni; De Leo, Alfredo; Russo, Paola; Scalise, Lorenzo; Cerri, Graziano; Caddemi, Alina; Cardillo, Emanuele
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this contribution, recent developments in the design and development of a novel compact smart radar for visually impaired and blind users are described. Starting from previous studies and according to the specific user requirements, a new antenna (dimensions: 54mm × 8.4mm × 1.44mm) and an integrated Tx/Rx circuit board, working in the 24–26 GHz frequency band, have been designed; the aim of these improvements is twofold: the miniaturization of the whole system allowing its integration onto a traditional white cane and a drastic reduction of the dimensions, weight and final costs of the system by using existing and available technologies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/240752 Collegamento a IRIS

2016 Electromagnetic Technology for a New Class of Electronic Travel Aids Supporting the Autonomous Mobility of Visually Impaired People
Visually Impaired: Assistive Technologies, Challenges and Coping Strategies
Autore/i: DI MATTIA, Valentina; Scalise, Lorenzo; Petrini, Valerio; Russo, Paola; DE LEO, Alfredo; Pallotta, Emanuele; Mancini, Adriano; Zingaretti, Primo; Cerri, Graziano
Editore: Nova Science Publishers
Classificazione: 2 Contributo in Volume
Abstract: It is well known that the most common and largely used assistive technology among the visually impaired community is the white cane. Despite it is a passive technology with a very limited range of work, its easiness of use and low cost make still prevalent its use. Many technologies have been proposed as alternative assistive devices (in literature and on the market) to improve the autonomous mobility of people affected by eye diseases. Nevertheless, whatever is the physical quantity used by these active assistive technologies - mainly ultrasonic or optical sensors - they present many limitations and none of them adequately meets the international guidelines defined for the electronic travel aids and the specific requests coming from the visually impaired community. This chapter aims to provide an overview of the existing travel aids for people affected by visual disorders, discussing pros and cons of available technologies, and to describe the design and the characterization of a novel class of electronic travel aids based on electromagnetic fields, whose advantages, with respect to the traditional ultrasonic and optic devices, will be explained. Starting from a laboratory prototype, the aspects relative to the miniaturization of the device will be discussed, with a particular attention to the realization of a small radiating element to be attached onto the cane. Operative tests with a blind end user will be reported, demonstrating several potentialities of the electromagnetic technology: detecting in advance (few meters from the user) dangerous objects of different shape and material, detecting the presence of obstacles located at chest or head levels, providing the position of the obstacle respect to the user, easiness of use, etc.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/235219 Collegamento a IRIS

2016 An electromagnetic contactless system for apnea monitoring
IEEE 2nd International Smart Cities Conference: Improving the Citizens Quality of Life, ISC2 2016 - Proceedings
Autore/i: Petrini, Valerio; Di Mattia, Valentina; Manfredi, Giovanni; De Leo, Alfredo; Russo, Paola; Cerri, Graziano; Scalise, Lorenzo
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The respiratory rate is one of the main vital parameters to be monitored in order to record the physiological and psychological status of a human being. In particular, apnea events represent a serious problem that affect adults and infants and can lead to irreversible brain damages and even to death. Despite these evidences, respiratory rate remains the less monitored parameter because of shortcomings of obstructive measurement techniques. For these reasons during last years we focused our research activity on the development of a smart electromagnetic sensing that allows remote and contactless breathing monitoring and reduces the request of collaboration of the monitored target. In this contribution we want to demonstrate that the electromagnetic approach proposed is also able to record long-time sleep breathing activity highlighting the presence of apnea events. To this aim a campaign of measurements have been conducted in a real domestic scenario and first interesting results will be shown together with some suggestions for future developments.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/239903 Collegamento a IRIS

2016 The use of the Electromagnetic Technology in Support to Visually Impaired Athletes Runners
Visually Impaired: Assistive Technologies, Challenges and Coping Strategies
Autore/i: Pieralisi, Marco; DI MATTIA, Valentina; Petrini, Valerio; Manfredi, Giovanni; Russo, Paola; DE LEO, Alfredo; Scalise, Lorenzo; Cerri, Graziano
Editore: Nova Science Publishers
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/235220 Collegamento a IRIS

2016 IMMUNITY TEST SIMULATION IN A MULTIPLE ANTENNA SOURCE STIRRED REVERBERATION CHAMBER
PROCEEDINGS OF THE XXI RINEM
Autore/i: DE LEO, Alfredo; Cerri, Graziano; Russo, Paola; MARIANI PRIMIANI, Valter
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Multiple antenna source stirring is an alternative technique to realize a reverberation chamber: in the proposed case, 62 monopoles are distributed on the chamber walls and fed two at time, so achieving 1891 combinations. The electromagnetic field distribution and the self and mutual impedances are analytically determinable, and statistics can be predicted through the computation of Cumulative Distribution Functions and Polar Plots. The model can be also extended to simulate an immunity test by inserting a DUT inside the working volume of the chamber. Both a monopole and a loop are analytically modeled to simulate common and differential mode noise. It must be highlighted that all mutual coupling among the transmitting antennas and the DUT are accounted for, in terms of mutual impedances. In the lower frequency range, undermoded condition, the technique takes benefit from the adoption of an out-of-phase feeding of each active couple of antennas that enhances field strength
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266645 Collegamento a IRIS

2015 Design and Realization of an Electromagnetic Guiding System for Blind Running Athletes
SENSORS
Autore/i: Pieralisi, Marco; Petrini, Valerio; DI MATTIA, Valentina; Manfredi, Giovanni; DE LEO, Alfredo; Scalise, Lorenzo; Russo, Paola; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: Nowadays the technologies aimed at improving the quality of life of people affected by visual diseases are quite common; e.g., devices to support walking or reading. Surprisingly; there is a lack of innovative technologies aimed at helping visually impaired athletes during physical activities. An example is represented by blind runners who need to be physically linked to a sighted guide by means of non-stretchable tethers during races; with consequent limitations in terms of performance and independence. This paper wants to investigate the possibility of realizing a system able to guide blind runners along a complex path; paving the way for the realization of an innovative device designed to improve their independence during training or competitions. The system consists of: (1) A mobile unit; which is placed before the runner and generates two “electromagnetic walls” delimiting the way; (2) a receiving unit (worn by the athlete) that provides vibro-tactile warnings every time the user is going outside the safe area so as to encourage him to move toward the central position. The feasibility and the utility of the system proposed are demonstrated by means of tests carried out thanks to the collaboration of a blind volunteer.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/227312 Collegamento a IRIS

2015 Analytical prediction of common mode noise in a source stirred reverberation chamber
Proceedings of 2015 IEEE International Symposium on Electromagnetic Compatibility (EMC ),
Autore/i: De Leo, A.; Mariani Primiani, V.; Russo, P.; Cerri, G.
Editore: IEEE Conference Publications
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: A multiple antenna source stirring technique is analytically studied and adopted to compute the common mode voltage induced across a cable terminal impedance. Sixty-two monopoles are distributed on the chamber walls. Chamber realizations are enhanced by feeding two antennas at a time so achieving a total of 1891 combinations. A cable loaded by a common mode impedance is inserted as device under test (DUT) inside the chamber. Both high frequency and low frequency cases are considered comparing the maximum values of the induced common mode voltage. In the model, all mutual coupling among the transmitting antennas and the DUT are accounted for. In the lower frequency range, undermoded condition, the technique takes benefit from the adoption of an out-of-phase feeding of each active couple of antennas. The electric field direction can be forced by a proper choice of the two active antennas.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/227879 Collegamento a IRIS

2015 Electromagnetic Technologies as Travel Aids for Visually Impaired Subjects
Ambient Assisted Living Italian Forum 2014
Autore/i: Cerri, G.; De Leo, A.; Di Mattia, V.; Manfredi, G.; Mariani Primiani, V.; Petrini, V.; Pieralisi, M.; Russo, P.; Scalise, L.
Editore: Springer International Publishing
Classificazione: 2 Contributo in Volume
Abstract: The aim of this paper is to present the electromagnetic (EM) technology as possible assistive technology for the mobility tasks of visually impaired subjects. The paper will present their characteristics, discussing pros and cons of their use with respect to the existing traditional technologies and electronic travel aids, in terms of performances, miniaturization and wearing comfort. In particular, two applications of EM technologies will be presented more in detail: a first example consists in the design and realization of a laboratory prototype of an EM system able to detect the presence of obstacles along the walking path of visually impaired users and hence to assist them during their mobility tasks, possibly allowing them to walk safely and independently. The second example is the theoretical and experimental study of feasibility of an EM system specifically addressed to visually impaired runners. In conclusion, some hints for discussion will be presented; the user interaction with the sensing system, the signal analysis and possible features extraction will be reviewed addressing issues requiring a multidisciplinary approach.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/227772 Collegamento a IRIS

2015 Multiparameter Electromagnetic Sensor for AAL Indoor Measurement of the Respiration Rate and Position of a Subject.
Proceedings of the 2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC 2015)
Autore/i: Scalise, L.; Petrini, V.; Di Mattia, V.; Russo, P.; De Leo, A.; Manfredi, G.; Cerri, G.;
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this paper, a new electro-magnetic sensing system for the indoor measurement of respiration rate and subject position is presented. The measurement system has been especially conceived for use in Ambient Assisted Living (AAL) applications; therefore, a specifically designed, radiation element has been designed and realized in order to be easily installed at home. The measurement principle is based on the measurement of the reflection coefficient S11 which is operated when a frequency sweep signal is transmitted by the radiation element placed in front of the subject. S11 values are related to the distance from the reflecting object (the subject) and can be consequently related to his/her respiration activity and position. A mathematical description of the algorithm for the extraction of the aimed information, the experimental set-up and some results, obtained in a real scenario (private apartment), are reported. These results clearly show the ability of the proposed sensing system to detect the presence of the subject, to measure the respiration rate and to determine his/her position within the observed environment. The proposed solution presents therefore most of the required features in order to be used for home monitoring and AAL applications.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/226171 Collegamento a IRIS

2015 A K-band miniaturized antenna for safe mobility of visually impaired people
Proceedings of 15th IEEE Mediterranean Microwave Symposium, MMS 2015
Autore/i: Di Mattia, Valentina; Petrini, Valerio; Pieralisi, Marco; Manfredi, Giovanni; De Leo, Alfredo; Russo, Paola; Cerri, Graziano; Scalise, Lorenzo
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: This contribution regards the design and realization of an electromagnetic system to support the autonomous mobility of visually impaired and blind people. The system works like a radar that transmits a short pulse and analyzes the echo coming from the surrounding. Operative tests carried out with the collaboration of a blind end user demonstrated several potentialities of the electromagnetic technology: detecting in advance (few meters from the user) dangerous objects of different shape and material, detecting the presence of obstacles located at chest or head levels, providing the position of the obstacles respect to the user, easiness of use, etc. In this context, a special attention has been paid to the miniaturization of the transmitting element, which is a k-band slot antenna to be integrated on a small circuit board to be attached onto a white cane.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/234421 Collegamento a IRIS

2015 A 3-D body model for physical activity monitoring by microwave radiation
Proceedings of 15th IEEE Mediterranean Microwave Symposium, MMS 2015
Autore/i: Manfredi, Giovanni; Petrini, Valerio; Di Mattia, Valentina; Pieralisi, Marco; De Leo, Alfredo; Russo, Paola; Cerri, Graziano; Scalise, Lorenzo
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The human body is a very complex structure, which has not been studied explicitly, until today, for remote monitoring application or wireless communication. This paper presents a preliminary study in the will to demonstrate how the combination of primitive shapes such as spheres, cylinders and parallelepipeds allows creating a simplified 3-D body model sufficient to analyze the interaction mechanisms of electromagnetic waves and resulting more efficient than numerical tools in terms of computational requirements. A comparison between the electric field scattered from a simple geometrical shape and from the realistic face of a phantom will be presented to show the accuracy of the model. To conclude, some experimental results with simulated data will be compared in order to provide a preliminary validation of the method.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/234420 Collegamento a IRIS

2015 Blind Athletes: Proposal for a Non-contact Guiding System
Proceedings del 6° Forum Italiano dell’Ambient Assisted Living (forITAAL2015)
Autore/i: Di Mattia Valentina; Petrini Valerio; Pieralisi Marco; Scalise Lorenzo; Russo Paola; Manfredi Giovanni; De Leo Alfredo; Graziano Cerri;
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/233729 Collegamento a IRIS

2015 Domestic monitoring of respiration and movement by an electromagnetic sensor
Ambient Assisted Living
Autore/i: V. Petrini; V. Di Mattia; A. De Leo; P. Russo; V. Mariani Primiani; G. Manfredi; G. Cerri; L. Scalise;
Editore: Springer International Publishing
Classificazione: 2 Contributo in Volume
Abstract: The aim of this paper is to investigate the capabilities of a novel electromagnetic technique designed for contactless monitoring of breathing activity in Ambient Assisted Living applications. The method is based on the transmission of a frequency sweep and the measurement of the reflection coefficient to determine the respiration rate of a subject. To date, the method is under optimization, but it has already shown interesting capabilities of calculating not only the respiration rate, but also additional features, as the position of the subject inside a room and his/her movements. After a brief mathematical description of the algorithm, some preliminary tests will be described concerning the monitoring of a human target inside a room. These first results clearly show the capability of the method to detect the subject, his breathing rate, position and physical activity. Of course further signal processing is required in order to distinguish between different types of movements and to classify them.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/205324 Collegamento a IRIS

2015 An EM Modeling for Rescue System Design of Buried People
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
Autore/i: DE LEO, Alfredo; Petrini, Valerio; Russo, Paola; Scalise, Lorenzo; DI MATTIA, Valentina; MARIANI PRIMIANI, Valter; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: The development of a rescue system for buried persons is a subject of growing importance in case of occurrence of natural disasters such as earthquake, landslides, or avalanches. In this paper a fully analytical model has been developed to get some fundamental a priori design characteristics. The proposed system is based on the detection of the victim movements due to its respiratory activity: in particular, when an electromagnetic (EM) wave impinges on a human body, the analysis of the reflected wave parameters such as amplitude, frequency, phase, or delay time allows for the detection of the breathing frequency. The model is simple on purpose because the great uncertainty concerning the characterization of many environmental parameters of a general situation makes a very detailed model useless. However, it is accurate enough to provide useful information about system design, filling the gap in the literature concerning the electromagnetic formulation of such kinds of problems. A system prototype was built using laboratory equipment to experimentally validate the model, and subsequently breathing frequency measurements were carried on, both in a lossless laboratory environment and in a lossy realistic scenario.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/226935 Collegamento a IRIS

2015 Remote monitoring of breathing activity and position of a subject in indoor environment: the HDOMO 2.0 project.
Proceedings del 6° Forum Italiano dell’Ambient Assisted Living (forITAAL2015)
Autore/i: Russo P.; Petrini V.; Scalise L.; Di Mattia V.; De Leo, A.; Manfredi G.; Cerri G.;
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/226172 Collegamento a IRIS

2014 An electromagnetic device for autonomous mobility of visually impaired people
Proceedings of the European Microwave Week 2014
Autore/i: V. Di Mattia; L. Scalise; P. Russo; A. De Leo; V. Mariani Primiani; V. Petrini ; G. Cerri
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The design of an electromagnetic (EM) novel device to be used as travel support to the mobility of visually impaired people is presented in this work. In particular, a preliminary study has been carried out using laboratory instrumentation in order to investigate the performances of an EM system in detecting obstacles located along user pathway, both in indoor and outdoor cluttered environments. Moreover, a portable EM system prototype has been realized and tested with a blind volunteer in order to both demonstrate potentialities and highlight peculiarities of using EM pulses for this application. The proposed EM system accomplishes most of the operative requirements of electronic travel aids for visually impaired subjects and can even provide additional information on obstacles, as for example height from the ground, distance and position.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/172704 Collegamento a IRIS

2014 EMC Aspects in Test Benches for Automotive Equipments
2014 International Symposium on Electromagnetic Compatibility, Tokyo (EMC'14/Tokyo),
Autore/i: Pieralisi M. ; Primiani Mariani V.; Russo P. ; De Leo A.; Cerri G. ; Fioravanti Matteo
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The continuous increase of demand for radios navigators makes the use of Automatic Test Equipments compulsory, in order to reduce the testing time and cost. The Telemakos is an Italian test equipment specifically designed to check radio navigator sensitivities. The paper reports the electromagnetic compatibility analysis carried out to meet the noise specifications. The Telemakos test bench is a very complex system, where subsystems fabricated by different manufacturers have to cooperate. The paper describes the actions required at power supply level, at cable harness level, and at fuse matrix level to ensure a complete internal electromagnetic compatibility.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/205321 Collegamento a IRIS

2014 Design and realization of a wideband antenna for non-contact respiration monitoring in AAL application
MESA 2014 - 10th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications, Conference Proceedings
Autore/i: V. Di Mattia; V. Petrini; E. Pallotta; A. De Leo; M. Pieralisi; G. Manfredi; P. Russo; V. Mariani Primiani; G. Cerri; L. Scalise;
Editore: IEEE / Institute of Electrical and Electronics Engineers
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: This contribution is part of a wider research project whose final aim is the realization of a small EM sensing system for non-contact monitoring of respiration activity in indoor environments. The paper presents the design of an optimized radiating element that satisfies challenging requirements: good impedance matching over a wide frequency bandwidth (3-5 GHz), directive radiation pattern, small dimensions (in order to reduce its invasiveness) and low cost for realization. In detail, an antenna model already existing in literature has been optimized and adapted to this specific application using a full wave numerical simulator. Finally a first antenna prototype has been realized and experimentally tested to compare the measured parameters with the simulated results.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/205718 Collegamento a IRIS

2014 Ambient Assisted Living electromagnetic sensor for continuous breathing monitoring applied to movement analysis: a preliminary study
Proceedings of the IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications
Autore/i: V. Petrini; V. Di Mattia; A. De Leo; P. Russo; V. Mariani Primiani; G. Manfredi; L. Scalise; G. Cerri
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The aim of this paper is to investigate the capabilities of a novel electromagnetic technique designed for contactless monitoring of breathing activity in Ambient Assisted Living applications. The method is based on the transmission of a frequency sweep and the measurement of the reflection coefficient to determine the respiration rate of a subject. To date, the method is under optimization, but it has already shown interesting capabilities for calculating not only the respiration rate, but also additional features, as the position of the subject inside a room and his/her movements. After a brief mathematical introduction of the algorithm, some preliminary tests are presented concerning the monitoring of a human target inside a room. These first results clearly show the capability of the method to detect the subject, his breathing rate, position and physical activity. Of course further signal processing is required in order to distinguish between different types of movements and to classify them.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/172703 Collegamento a IRIS

2014 A Novel Measurement Method for Respiration Rate by Electromagnetic Frequency Sweep
Proceedings of the IEEE International Symposium on Medical Measurements and Applications,
Autore/i: L. Scalise; V. Petrini; P. Russo; V. Mariani Primiani; A. De Leo; V. Di Mattia; G. Cerri
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The non-contact measurement of the respiration rate of a subject offers several interesting applications in hospital as well as in domestic environments. The use of electromagnetic waves has been proved to be a feasible approach to this purpose. In this paper, authors present a novel measurement method, based on the transmission of a frequency sweep and the measurement of the reflection coefficient (S11), to determine the respiration rate of the monitored subject without contact. The proposed method places itself at the half-way between continuous wave (CW) and ultra wide band (UWB) techniques, offering some advantages of both methods and improving its feasibility. Experimental tests have been carried out on voluntary subjects simultaneously measured with two reference systems in order to compare respiration frequency values. Results show a good correlation between the data measured during tests, proving that the proposed method is a valid approach to the issue of the non-contact assessment of the respiration rate both in clinical and domestic environments.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/172702 Collegamento a IRIS

2014 Theoretical and Experimental Safety Aspects Evaluation of Induction Heating Cooking Systems
IEEE International Symposium on Electromagnetic Compatibility
Autore/i: De Leo A.; Russo P.; Cerri G.; Mariani Primiani V.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this paper a rigorous approach for the computation of the electromagnetic field around an actual Induction Heating (IH) cooking system is presented. The electromagnetic model is validated by the comparison with the measurements of the input impedance of the coils and the magnetic flux density spatial distribution. The predictions of the model are used to calculate the safety area according to ICNIRP requirements.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/187904 Collegamento a IRIS

2014 The Electromagnetic Technology for Safe Mobility of Visually Impaired People
Proceedings of the 22nd Mediterranean Conference on Control and Automation
Autore/i: G. Cerri; A. De Leo; V. Di Mattia; G. Manfredi; V. Mariani Primiani; V. Petrini; M. Pieralisi; P. Russo; L. Scalise
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/172705 Collegamento a IRIS

2014 A Breathing Detection Medical Device for Rescue of Buried People
IEEE International Symposium on Electromagnetic Compatibility
Autore/i: De Leo A.; Petrini V.; Russo P.; Mariani Primiani V.; Scalise L.; Cerri G.
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this work the feasibility study of a medical equipment based on electromagnetic technology for breathing detection is presented; this system was designed to detect a victim buried from a landslide through the sensing of the thorax displacements due to breathing activity. The system was preliminary tested into a controlled environment and subsequently in a real scenario (a road construction site) where its use could minimize the time between the accident and the arrival of the first emergency team, so increasing the chance to save the victim's life.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/191304 Collegamento a IRIS

2014 Rescue of buried people: an electromagnetic model for a feasibility study and system design
Editore: Università Politecnica delle Marche
Classificazione: 8 Tesi di dottorato
Abstract: Lo scopo di questo lavoro è di evidenziare la fondamentale importanza di un modello elettromagnetico per la progettazione di un sistema elettromagnetico per la ricerca di esseri umani sepolti sotto macerie in caso di eventi disastrosi come terremoti, frane o valanghe. Il sistema proposto si basa sul riconoscimento del movimento della vittima causato dalla sua attività respiratoria, rilevandone in particolare la frequenza: infatti, quando un'onda elettromagnetica incide su un corpo umano che varia le sue dimensioni durante un atto respiratorio, l'onda riflessa varia di conseguenza alcune sue proprietà elettromagnetiche come l’ampiezza, la frequenza, la fase o il tempo di ritardo in caso siano usati impulsi. La geometria dello scenario e del corpo è stata semplificata per risolvere in una forma chiusa il problema elettromagnetico dell'interazione del corpo e campo interferente. Nonostante la semplice formulazione, i risultati sono soddisfacenti e mostrano come alcuni importanti requisiti di sistema possano essere ottenuti a priori, come ad esempio l’intervallo ottimale di frequenze di lavoro o la scelta tra la modalità di funzionamento a onda continua e quella basata su impulsi a banda larga. Il modello è inoltre in grado di predire la sensibilità in termini di fase e modulo variazioni in funzione dello scenario previsto. Nella sua prima formulazione, il modello è basato su illuminazione da onde piane del solo torace umano, e in seguito sono state introdotte le altre parti del corpo: questo modello è stato validato mediante simulazione numerica. In seguito, al fine di considerare uno scenario più realistico, l'illuminazione onda piana è stata sostituita con la radiazione da un’antenna ad apertura equivalente, e le predizioni del modello sono state confermate dai risultati delle misure sperimentali. Il modello è stato quindi validato sia numericamente sia sperimentalmente. Grazie alle specifiche a priori fornite dal modello analitico, è stato costruito con attrezzature di laboratorio un prototipo di un sistema elettromagnetico per rilevare la frequenza respiratoria, e tale sistema è stato testato con successo in ambiente controllato. In fine i test sono stati ripetuti in una simulazione di una vittima sepolta da terreno di scavo durante la realizzazione di una galleria in un cantiere stradale. Queste misure hanno dimostrato la validità del modello elettromagnetico proposto e la fattibilità di un sistema elettromagnetico per la ricerca di una vittima sepolta da macerie e la sua capacità di rilevare l'attività respiratoria.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/242864 Collegamento a IRIS

2014 Electromagnetic sensing of obstacles for Visually Impaired users
Ambient Assisted Living
Autore/i: Scalise, Lorenzo; DI MATTIA, Valentina; Russo, Paola; DE LEO, Alfredo; MARIANI PRIMIANI, Valter; Cerri, Graziano
Editore: Springer International Publishing Switzerland
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Respiration activity is one of the fundamental functions of the human being (also known as vital signs) which is monitored for health purposes. Often it is required to operate the sensing of the respiration activity out of hospitals or clinical environments and without contact with the patient and possibly from a distance i.e. for the home monitoring of patients or for the ambient assisted living, AAL). Unfortunately, at present the sensing apparatus for respiration monitoring purposes are mainly based on the use of contact methods (chest belt, nasal temperature transducers, etc.) which appear to be not suited for such tasks. In this paper, the authors propose a novel approach based on the use of electromagnetic sensing of the respiration activity of subject. The proposed approach provide a remote, continuous measurement of the inspiration/expiration acts of a subject without requiring a contact; these features of the proposed system are suited for domestic monitoring and AAL.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/172706 Collegamento a IRIS

2014 Remote Measurement of the Respiration by Electromagnetic Sensing
Ambient Assisted Living
Autore/i: Scalise, Lorenzo; Petrini, Valerio; Russo, Paola; DE LEO, Alfredo; MARIANI PRIMIANI, Valter; DI MATTIA, Valentina; Cerri, Graziano
Editore: Springer International Publishing Switzerland
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/172707 Collegamento a IRIS

2014 Efficient numerical–analytical tool for time domain obstacles detection
IET SCIENCE, MEASUREMENT & TECHNOLOGY
Autore/i: V. Di Mattia; P. Russo; A. De Leo; L. Scalise; V.M. Primiani; G. Cerri
Classificazione: 1 Contributo su Rivista
Abstract: The aim of this work is to implement a mixed approach able to provide an efficient time domain solution of the electromagnetic (EM) coupling between an antenna and an obstacle distant few meters away. The idea is to divide the problem into a small number of less complex sub-problems exploiting the advantage of solving some of them by analytical models and the others by numerical codes. To this end, the electric field radiated by the antenna just close to the object has been sampled in time and spatial domains by means of a small number of plane waves; for each plane wave impinging on the object, the scattering problem has been solved by a commercial code; finally, the total echo has been obtained as analytical summation of all the scattering contributions at the antenna position. The resulting echo has been compared with that coming from a full-wave numerical solution, whereas the voltage signal received at the antenna port has been compared with that measured by experimental investigations. The positive results obtained demonstrate the possibility of using the tool to effectively study obstacle detection problems, for example as support to the design of an EM obstacles detector to improve visually impaired mobility.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/128278 Collegamento a IRIS

2014 Safety Investigation of a Magnetic Pulse Applicator for Heart Stimulation
IEEE TRANSACTIONS ON MAGNETICS
Autore/i: Alfredo De Leo; Valter Mariani Primiani; Paola Russo; Franco Moglie; Graziano Cerri
Classificazione: 1 Contributo su Rivista
Abstract: The safety area around the applicator of a high current pulse generator, able to magnetically stimulate the human heart, is characterized in terms of allowable induced current. The magnetic field produced by the adopted coil is computed using a complete analytical model to determine the limit area allowed for medical operators. The International Commission on Non-Ionizing Radiation Protection recommendation is adopted for the occupational exposure limits. The presence of a ferrite tile close to the stimulation coil is also investigated. The ferrite tile enhances the field level on the patient side, making the magnetic stimulation more efficient. Experimental validation demonstrates the model's reliability.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/177302 Collegamento a IRIS

2014 SOURCE STIRRING ANALYSIS FOR REVERBERATION CHAMBERS
PROCEEDINGS OF THE XX RINEM
Autore/i: Cerri, Graziano; DE LEO, Alfredo; MARIANI PRIMIANI, Valter; Russo, Paola
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The source stirring technique for reverberation chambers (RC) is obtained by several monopole antennas located on the chamber walls. The stirring action is accomplished subsequently feeding each antenna pairs covering all possible combinations. Antennas are fed by real generators and their length is not negligible with respect to the wavelength. An efficient way, that improves the modal series convergence, is presented to compute the electromagnetic field inside the large shielded room. Results are checked by means of typical RC parameters such as the cumulative distribution function (CDF), the polar plot of each field components and field uniformity. Out-of-phase dipole feeding allows to improve field uniformity especially in the lower frequency range.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/266647 Collegamento a IRIS

2013 Electromagnetic travel aids for visually impaired users
Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013
Autore/i: Valentina Di Mattia; Paola Russo; Lorenzo Scalise; Alfredo De Leo; Valter Mariani Primiani; Valerio Petrini; Graziano Cerri
Editore: IEEE / Institute of Electrical and Electronics Engineers
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: This paper describes the development of an electromagnetic travel aid aiming to the improvement of the mobility of blind and visually impaired subjects in unknown environments. The paper reports the preliminary results obtained with a portable prototype. They show the feasibility of the electromagnetic “cane”, the possibility to detect the presence of obstacles not detected with ordinary cane and address further improvements
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/128281 Collegamento a IRIS

2013 Dispositivo elettromagnetico per la guida di un soggetto ipovedente o non vedente.
Autore/i: L. Scalise; V. Mariani Primiani; P. Russo; A. De Leo; G. Cerri
Classificazione: 6 Brevetti
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/98262 Collegamento a IRIS

2013 EM System to Guide Visually Impaired Running Athlete
Piers 2013
Autore/i: V. Petrini; V. Di Mattia; M. Pieralisi; L. Scalise; V. Mariani Primiani; A. De Leo; P. Russo; G. Cerri
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/158720 Collegamento a IRIS

2013 A Hybrid Numerical-Analytical Model for the Electromagnetic Characterization of the Admittance Matrix of Scattering Objects
PROGRESS IN ELECTROMAGNETICS RESEARCH B
Autore/i: Russo, Paola; D., Shahu; DE LEO, Alfredo; MARIANI PRIMIANI, Valter; Scalise, Lorenzo; Cerri, Graziano
Classificazione: 1 Contributo su Rivista
Abstract: The aim of this work is to implement a hybrid approach able to provide an efficient solution of the electromagnetic coupling between an antenna and an obstacle distant few meters away. The idea is to divide the problem into a small number of less complex sub-problems exploiting the advantage of generating the admittance matrix that describes the scattering problem by a numerical code. To this end, the electromagnetic field impinging on the object has been characterized by means of a proper number of very narrow beams; for each beam the scattering problem has been solved by a commercial code; finally, the total admittance matrix has been obtained as composition of all the scattering contributions. The resulting echoof a moving obstacle has been compared with that measured by experimental investigations, both for metallic and dielectric bodies.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/129662 Collegamento a IRIS

2013 Developing and Testing a Capacitive Distance Sensor for Use in Industrial Environment
Proc. of the 2013 International Symposium on Electromagnetic Compatibility (EMC Europe 2013)
Autore/i: A. De Leo; D. Scaradozzi; G. Conte; M.Candelaresi; G. Cerri; V. Mariani Primiani; P. Russo
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: In this work, the development and the testing of a capacitive distance sensor, based on E-field measurement, for applications in industrial environments is presented. In particular, the structure and the working principle of the sensor, as well as the process of optimization of the sensing elements and some functional tests in absence of disturbances are described. Then, the EMC precompliance, in particular the radiated susceptibility and the ESD immunity, is experimentally investigated. In particular it must assured that the functionality of the robot will be compliant to safety assessment even in the presence on an external disturb. Results are discussed and solutions to make the apparatus more immune are briefly outlined.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/129862 Collegamento a IRIS

2013 Wireless sensing for the respiratory activity of human beings: measurements and wide band numerical analysis.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
Autore/i: Lorenzo Scalise; Valter Mariani Primiani; Paola Russo; Alfredo De Leo; Desar Shahu; Graziano Cerri
Classificazione: 1 Contributo su Rivista
Abstract: In this paper, an electromagnetic sensing system for the measurement of the respiratory activity is presented. The aims are to demonstrate the feasibility of the proposed approach and in particular to evaluate the effect on the measured signal of the distance between the subject and the sensing apparatus. Moreover an electromagnetic model of the system, including the monitored subject, is proposed as a tool to solve the problem of selecting working parameters for system design. The sensing system is based on the measurement of the phase variation of the reflection coefficient caused by the respiratory activity. The phase signal compared with the thorax displacement measured by a reference instrument shows a high correlation (R =0.97) for different subject postures (sitting, standing and lying) and a reduction of the signal amplitude with the distance (-0.11 dB/cm) is reported. The numerical simulations performed on a wide band highlight the frequencies where the method exhibits the highest sensitivity to thorax movements. The sensitivity can be further improved by reducing the antenna beamwidth. Despite the signal amplitude reduction, the proposed system makes it possible to correctly operate at distances up to 2.5 m.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/94263 Collegamento a IRIS

2012 Dispositivo di ausilio per non vedenti
Autore/i: Graziano, Cerri; Alfredo De, Leo; Valter Mariani, Primiani; Paola, Russo; Lorenzo, Scalise
Classificazione: 6 Brevetti
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/83225 Collegamento a IRIS

2012 Radiated susceptibility of breath monitoring system based on UWB pulses in spacecraft modules
Proceedings of the International Symposium on Electromagnetic compatibility- EMC Europe 2012
Autore/i: Paola Russo; Valter Mariani Primiani; Alfredo De Leo; Graziano Cerri
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The paper describes some EMC aspects related to a UWB radar for monitoring astronauts breathing activity. In particular the susceptibility problems are analysed. Both the standard susceptibility requirements and the functional susceptibility are considered. In particular this last aspect is fundamental for the design of a robust post processing tool for the calculation of the breathing frequency
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/80214 Collegamento a IRIS

2012 Radiated emission and susceptibility of breath monitoring system based on UWB pulses in spacecraft modules
PROCEEDINGS OF THE XIX RINEM
Autore/i: P. RUSSO; V. MARIANI PRIMIANI; A. DE LEO; G. CERRI
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: This work is included in a project of ASI, which involves several Italian entities, universities and companies, called NIMURRA, that stands for “Non Invasive Monitoring by Ultra wide band Radar of Respiratory Activity of people inside a spatial environment”. It regards the placement of a UWB radar inside a spatial module to obtain information on the respiration of astronauts. Using a pulse characterized by a very wide bandwidth in a highly resonant environment, which contains electronic instrumentation, it is necessary to consider EMC issues relating to radiated emissions, but also with regard to the susceptibility of the UWB radar itself. The objective of the work is to give some useful information to the designer of the monitoring system that take into account the EMC problem. In particular considering the radiated emission and susceptibility problem we obtain some information on the maximum input signal that can be radiated by the system, and to the maximum electric field level that the system has to tolerate in order to fulfill the EMC standard.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/83231 Collegamento a IRIS

2012 Radiated Emission of Breath Monitoring System Based on UWB Pulses in Spacecraft Modules
Proceedings ESA Workshop on Aerospace EMC, 2012
Autore/i: P. Russo; V. Mariani Primiani; A. D. Leo; G. Cerri
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The paper describes some EMC aspects related to a UWB radar for monitoring astronauts breathing activity. Compliance to EMC space standards forces some design aspects, in particular the peak voltage and the pulse waveform. Moreover some simulations were carried out to consider realistic operating condition. In the first case the interference towards a victim wifi circuit was analyzed, in the second case the effect of the environment on the radiated pulse was studied.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/77150 Collegamento a IRIS

2012 Breath detection of humans buried in a homogeneous lossy medium: a simplified analytical model
Proceedings of the International Symposium on Electromagnetic compatibility- EMC Europe 2012
Autore/i: Alfredo De Leo; Valter Mariani Primiani; Paola Russo; Desar Shahu; Valentina Di Mattia; Graziano Cerri
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The aim of this work is to highlight the paramount importance of the availability of an electromagnetic model for the design of system based on electromagnetic radiation for search and rescue operation of humans buried under different materials as debris, and snowslide. In this contribution the monitoring of the breathing activity of a man buried into a homogeneous lossy medium has been analyzed. The geometry of the scenario and the body have been simplified in order to model the electromagnetic problem of the interaction of the body and impinging field in a closed-form. In spite of the simple formulation the results are satisfactory and show how some a priori important system requirements can be obtained, as for example the most suitable working frequency range. The model is able to predict the sensitiveness in terms of phase and module variations depending on the scenario.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/80215 Collegamento a IRIS

2012 Electromagnetic Aids for Visually Impaired Users
II Convegno Nazionale Interazioni fra Campi Elettromagnetici e Biosistemi
Autore/i: Scalise L.; Mariani Primiani V.; Shahu D.; De Leo A.; Russo P.; Di Mattia V.; Cerri G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: This paper investigates the capability of an electromagnetic obstacle detection system for visually impaired persons, based on the use of a laboratory Ultra Wide Band (UWB) pulsed radar. Despite the fact that UWB pulsed radar is a laboratory system, not specifically designed for the daily mobility of visually impaired users, this work demonstrates the possibility of adopting it for that purpose
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/80076 Collegamento a IRIS

2012 Experimental Investigation of Electromagnetic Obstacle Detection for Visually Impaired Users: A Comparison With Ultrasonic Sensing
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Autore/i: Scalise L.; Mariani Primiani V.; Russo P.; Shahu D.; Di Mattia V. ; De Leo A.; Cerri G.
Classificazione: 1 Contributo su Rivista
Abstract: The use of electromagnetic (EM) fields for obstacle detection to aid mobility of visually impaired people is presented in this paper. The method proposed is based on the launch of EM pulses and on the measurement of the reflected signal which explores a region in front of the user of about 3 m. A laboratory system is set up, its performances (detecting the presence and the distance of obstacles) are investigated, and the measurements are compared with the data measured by an ultrasonic obstacle detection system. Results show that, with the EM system, all the obstacles tested (up to a minimum size of 3 cm $times$ 3 cm, at a distance of 3 m) are correctly detected, as well as some specific targets (a chain, a pole, etc.) that are not visible by the ultrasonic system. The EM system has been tested in indoor and outdoor cluttered scenarios at the presence of real obstacles (single and multiple), and in all cases, it detects their presence with a signal-to-noise ratio ranging from 10 to 23 dB. Despite the use of a laboratory system, still not specifically designed for daily use, this paper demonstrates the possibility of adopting EM field pulses for obstacle detection, highlighting advantages with respect to ultrasonic systems and addressing future research activity to design an improved ad hoc EM system.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/73307 Collegamento a IRIS

2011 Non contact monitoring of the respiration activity by electromagnetic sensing.
2011 IEEE International Symposium on Medical Measurements and Applications, MeMeA 2011
Autore/i: L. Scalise; A. De Leo; V. Mariani Primiani; P. Russo; D. Shahu; G. Cerri
Editore: IEEE
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The aim of this paper is to present a novel measurement method for the detection of the respiratory activity (respiration rate and respiration period) based on the use of a continuous wave (6 GHz) microwave radar reflectometry technique. The paper aims, in particular, to explore the effect on the signal quality of distance D between the sensing apparatus and the patient. The measurement method proposed is based on the measurement of the phase variation of the reflection coefficient (S11) signal measured by a vectorial network analyzer connected to a double ridge horn antenna. The S11 signal has been compared with the synchronous acquisition made by means of a laser Doppler vibrometer (LDVi), measuring the thorax oscillations caused by the respiratory activity. Both signals have been filtered in order to eliminate the effect of high frequency disturbances (heartbeat) and noise. Results show an high correlation between respiration peaks measured with the proposed system and with LDVi; a reduction of the amplitude of the S11 signal phase (as well as the SNR) is reported in correspondence to an increasing of the distance D (0.11 dB/cm). Tests have been repeated for standing as well as for sitting condition of the subject confirming a better signal quality for the later. Despite the fact that S11 phase variation and SNR are reduced by the distance D, in our experiments, it is still possible to correctly measure the respiration period up to 2.5 m. Data measured show that the reflectometeric approach can be used to monitor at distance with sufficient high SNR (18 dB at 2.5 m) the respiration activity of a subject without the need of a direct contact with the subject skin by means of electrods of sensing belts.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/59515 Collegamento a IRIS

2011 Numerical and Experimental Methods for the Investigation of EMI into Spacecraft Modules Caused by UWB Signals
Proceedings of the EMC Europe 2011 Conference
Autore/i: De Leo A.; Mariani Primiani V.; Russo P.; Cerri G.
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The paper presents some simulated and measured results concerning the electromagnetic field caused by an ultra wide band (UWB) source located inside a spacecraft module. The UWB signal is intentionally radiated for non-contact detection of human vital signals. The main goal of the work is to address the EMI problems caused by such a radiated field into the spacecraft equipment during the design stage of detection system. This allows the optimization of power level, waveforms and radiating antenna properties. Results given by simulations are experimentally validated showing good agreement.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/63312 Collegamento a IRIS

2011 A realistic model for the analysis of heart magnetic stimulation
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
Autore/i: A. P. Pastore; A. De Leo; R. De Leo; G. Della Chiara; V. Mariani Primiani; F. Moglie; G. Cerri
Classificazione: 1 Contributo su Rivista
Abstract: The aim of the paper is the development of an accurate numerical model to compute the current density flowing through the heart of a virtual human body, and induced by an external electric or magnetic excitation. The model has been experimentally validated and then applied to investigate the main characteristics of the heart magnetic stimulation. This has been carried out by comparing the current density induced in the cardiac region by an external magnetic pulse with the corresponding quantity due to the more traditional electric source. Magnetic stimulation is studied because it offers some advantages: in fact, compared with the electrical stimulation, this technique is contactless and might allow the stimulation of a dressed patient. The design constraint of the whole system is represented by the current density, whose waveform and intensity are a compromise between the strength of the magnetic induction field and the pulse rise time.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/54452 Collegamento a IRIS

2010 A Numerical Model for the Analysis of Heart Magnetic Stimulation
Proceedings of the XVIII RiNEm
Autore/i: G. Cerri; A. De Leo; R. De Leo; G. Della Chiara; V. Mariani Primiani; F. Moglie; A. P. Pastore
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: An accurate numerical model has been developed to evaluate the current density flowing through the heart of a virtual human body to compare an electric and a magnetic excitation. This model is useful to investigate cardiac stimulation with a magnetic pulse. The waveform and intensity of the current density are a compromise between the strength of the magnetic induction field and the pulse rise time.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/68215 Collegamento a IRIS

2010 Safety aspects of a system for heart stimulation induced by a magnetic pulse
Proceedings of EMC Europe 2010
Autore/i: CERRI GRAZIANO; DE LEO ALFREDO; DE LEO ROBERTO; DELLA CHIARA GIUSEPPE; MARIANI PRIMIANI VALTER; F. MOGLIE; PASTORE ANNA PIA; RUSSO PAOLA
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: A system for heart stimulation induced by a magnetic pulse has been designed. It is characterized by high intensity current pulses, and therefore safety may arise for operators and medical devices during its use. In particular, in this contribution safety considerations are analyzed and shielding actions are proposed in order to make cardiac stimulation available in hospital environment.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/46261 Collegamento a IRIS

2009 Investigation of the feasibility of magnetic cardiac stimulation
Abstract collection, joint meeting of the Bioelectromagnetics Society and the European BioElectromagnetics Association 2009
Autore/i: Cerri G.; De Leo A; De Leo R; Della Chiara G; Mariani Primiani V; Moglie F; Pastore A. P; Russo P
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/54142 Collegamento a IRIS

1999 Design of a slot antenna for cellular phone
Proc. of XXVIth URSI General Assembly, Toronto
Autore/i: F. MOGLIE; DE LEO A; CERRI G
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/42809 Collegamento a IRIS


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