Search results for "camp"
showing 10 items of 1995 documents
Random quasi-phase matching in congruent lithium tantalate waveguides by proton exchange
2012
A report is presented on broadband second-harmonic generation in the range between 930 and 970 nm using random quasi-phase matching in a planar waveguide fabricated by soft proton exchange in congruent lithium tantalate. Bulk and waveguide measurements are compared, outlining the averaging role of guided-wave modes and their interactions with respect to spectral acceptance and near-field profile.
Neogene and Quaternary fan-delta deposits in southeastern Spain. Field Guide.
1991
[EN] A guided field-trip througIt tIta basins of Fortuna, Carrascoy-Murcia, Lower Segura and Cope. with detailed sections, interpretation of rock bodies and sedientary models.
Constrained-Design of Passive UHF RFID Sensor Antennas
2013
Passive UHF RFID tags may be used, beside labeling, to remotely observe the physical/chemical change of the tagged object, through modulation of their impedance and gain, thus acting as sensor antennas. The design of this new class of devices can be mastered by fully understanding the relationship between communication and sensing with the purpose to balance the maximization of the dynamic range of the response with the stability of the read distance. A new kind of communication/sensing nomogram permits to display both behaviors in a unitary way and to predict their physical limits, as well as to formalize a multi-parameter general-purpose optimization methodology. The procedure is demonstr…
NIGHT-Care: A Passive RFID System for Remote Monitoring and Control of Overnight Living Environment
2014
AbstractAn Ambient Intelligence platform, NIGHTCare, for remote monitoring and control of overnight living environment is here proposed. The platform, entirely based on RFID passive technology is able to recognize nocturnal behaviors and activities, generates automatic alarms in case of anomalous or pathological events and support diagnostics. The results of a complete test in real scenario are presented, together with a numerical assessment of electromagnetic safety issues.
Human body sensing: A pervasive approach by implanted RFID tags
2011
Starting from the physical evidence that passive RFID systems may be used as self-sensing devices, the feasibility of human monitoring by means of implanted tags is here investigated. The key parameters to master with the purpose to enhance the sensitivity of the implanted radiosensor have been theoretically analyzed and numerically applied to a specific medical problem, i.e. the continuous monitoring of liver cancer evolution. Preliminary experimental results with simplified phantoms corroborate the analysis.
Passive UHF RFID antennas for sensing applications: Principles, methods, and classifcations
2013
UHF passive radio-frequency identification technology is rapidly evolving from simple labeling of things to wireless pervasive sensing. A remarkable number of scientific papers demonstrate that objects in principle can have their physical properties be remotely tracked and monitored all along their life cycle. The key background is a new paradigm of antenna design that merges together the conventional communication issues with more-specific requirements about sensitivity to time-varying boundary conditions. This paper presents a unified review of the state of the art of the tag-as-sensor problem. Particular care is taken to formalize the measurement indicators and the communication and sens…
Pervasive body sensing: Implanted RFID tags for vascular monitoring
2010
Beside the common logistic usages of the Radio Frequency Identification (RFID) technology, one of the most innovative and promising applications is the possibility to process the backscattering signals to detect additional information about the target, such as its state and its evolution, without any specific embedded sensor or local power supply. The rationale of this idea lies in the clear dependence of the tag's input impedance and reflectivity on the physical and geometrical features of a real target. When the object where the tag is attached on undergoes some changes along with the time, the tag's electrical features also change and these variations can be remotely detected by the read…
Postfazione
2014
La riflessione sulla discriminazione nei confronti delle comunità ROM dimostrano che tre sono i bisogni fondamentali: casa, istruzione e lavoro; gli stessi condivisi da un terzo della popolazione delle città del Sud. La ricerca suggerisce che non vi sarà fine della discriminazione se non si chiuderanno i "campi" e non si avvieranno politiche serie di inclusione sociale.
RFID passive gas sensor integrating carbon nanotubes
2011
Carbon nanotube (CNT) composites are sensitive to the presence of gases due to their high surface-to-volume ratio and hollow structure that are well suited for gas molecule absorption and storage. Such sensing capability is here integrated with UHF RF identification (RFID) technology to achieve passive and low-cost sensors, remotely readable. CNT film (buckypaper) is used as a localized variable resistive load integrated into a tag antenna, which becomes able to transduce the presence of hazardous gas in the environment, ammonia in this case, into a change of its electromagnetic features. The dynamic range and the hysteresis of the radio sensor are investigated by simulations, equivalent ci…
Il progetto “Oltre l’orizzonte: contro-narrazioni dai margini al centro”
2020
Il contributo descrive il progetto europeo OLTRE, acronimo di “Oltre l’orizzonte: Contro-narrazioni dai margini al centro”, è un progetto cofinanziato dalla Commissione europea, in particolare dal DG Affari Interni (Fondo per la Sicurezza Interna - Programma per l’Empowerment della Società Civile). OLTRE nasce con la finalità precipua di contribuire alla prevenzione dei fenomeni di radicalizzazione islamica sul territorio italiano, principalmente attraverso una campagna di comunicazione online. Per prevenire la radicalizzazione è necessario ridurre la vulnerabilità dei soggetti ritenuti “a rischio”, nel nostro caso specifico i giovani italiani con background migratorio di fede musulmana.