876 research outputs found
Combinazioni lessicali fisse in italiano e spagnolo: dettagli determinanti
No full textIl presente contributo intende indagare le proprietà di una tipologia di combinazione lessicale, la locuzione verbale, nella lingua italiana e in quella spagnola, incentrandosi su due aspetti che possono rivelarsi decisivi, ovvero 1) la corrispondenza interlinguistica dei verbi ‘dar’–‘dare’ e ‘hacer’–‘fare’, anche nella loro veste di verbi supporto e 2) la presenza di determinante e, nello specifico, di articolo determinativo o di articolo indeterminativo nell’unità sintagmatica
Multi-parametric and distributed RFID sensing
No full textThe radio-frequency identification (RFID) sensors are considered one of the enabling technologies for the Internet of Thing (IoT) paradigm, capable to connect every physical object to the cloud for exchanging information. Starting from the its intuitive working principle, based on the backscattering modulation, the strengths of the RFID technology rely on its stealthy nature, low-complex electronics and low-power demanding. These features all together made this technology competitive not only for logistic purposes, as natural replacement of the barcode, but also in all those contexts and applications where embedded, remote or even passive sensing capabilities are required. Moreover, the RFID sensing technology can support large scale implementation thanks to its low-cost manufacturing process. Despite of the above mentioned advantages w.r.t. other active technologies (such as Bluetooth and WiFi), they are not as pervasive as expected in industry and daily life yet. In the context of the digital -passive and battery assisted passive (BAP)- Ultra-High-Frequency (UHF) RFID sensors, this thesis focuses on four main challenges that the UHF-RFID technology should face up with to boost its rise outside the logistic scenario: detuning, complexity, density and reliability. The natural dependence on the surrounding materials makes the design of the antenna a delicate task. Although the recent progress in the development of IC modules with self-tuning capabilities, the impedance mismatch between antenna and IC can still seriously limiting the tag performance when it operates in an environment not considered during the antenna design stage. Considering the high electromagnetic variability of the human body, this thesis investigated a compact, time-saving and bidirectional tuning mechanism to overcome the detuning effect, hence performance loss, when the RFID transponder is applied on different body parts. Exploiting one of the most attractive feature of the digital RFID sensors, i.e. their II being low-complex electronic platforms, this thesis shown the development of an epidermal flexible RFID sensor board suitable for multi-sensing purposes. The potentiality of the developed RFID board was demonstrated by the simultaneous acquisition of three parameters, such as skin temperature, pH of the sweat and sodium concentration in a buffer solution. Compared to other active technologies, the proposed UHF-RFID multisensing board is a valid candidate for the massive and automatic monitoring of patients/user or athletes. Another challenge concerns the application of sensors on large surfaces to monitor their status, such as the presence of structural damages. This issue includes two aspect, namely the deployment of discrete sensors and the development of distributed ones. By focusing on the distributed sensors, this thesis introduced the novel idea of using pre-fractal curves as distributed crack detectors. By exploiting the features of some Space-Filling Curve (SFC) families, the leading idea is to wrap the SFC-based electrode to the target surface like a tattoo; the connection of that distribute electrodes to an UHF-RFID IC with anti-tamper capabilities allows the real-time crack detection and digitalization. Unlike the common crack detection techniques based on the shift of the resonance frequency of the antenna due to the crack occurrence, the proposed method keeps the sensor separated by the RFID transponder. As shown in this thesis through several experiments, this feature extends the applicability of this approach to different kind of materials, from plastic to metals, passing through stretchable objects. A further step towards the stable adoption of the UHF-RFID sensing-oriented ICs into industrial processes might be done by improving the reliability of such technology in extreme conditions. This thesis carried out a thermal analysis on two different UHF-RFID transponders, since their behavior in medium/high temperature is mostly unknown. The study revealed the need for a correction factor to overcome acquisition errors due to high temperature exposition. The compensation in the thermal drift facilitated the adoption of those RFID sensors in a real industrial scenario, driving the manufacturing process towards the Industry 4.0 framework. Overall, all the insights provided by this thesis can be considered as a further milestone for the advancement in the exploiting the sensing capabilities of the RFID technology in some strategic fields, such as manufacturing, healthcare and structural health monitoring
RFID-Based Stress Predictive Engineering
No full textThe aging of materials is one of the main causes of failure of instruments and
devices. Availability of early detection tools can improve the Predictive
Maintenance process to extend the lifetime of devices, saving on costs and time.
We here introduce the new paradigm of wireless monitoring of surface integrity
based on Space Filling Curves (SFC). It acts as an artificial electric skin suitable
to envelope a surface to detect from remote the presence of small aging signs. In
particular, the occurrence of an even small surface crack is detected in a binary
form and transmitted remotely, following a standard RFID interrogation. The
feasibility of the idea is supported by numerical analysis and experimental
outcomes on 2D and curved thin, flexible and stretchable surfaces and metallic
objects, such as an orthopedic prosthesis
Neurovegetative-Somatic Integration and Behavior - Proceedings of the 4th Seminar of the Study Group on the Autonomic Nervous System of the Italian Society of Neurology
No full textI primi dieci anni della mediazione delle controversie civili e commerciali in Italia: riflessioni e proposte
No full textLo scritto sottopone ad analisi i risultati relativi all’utilizzo degli strumenti negoziali di risoluzione delle controversie civili introdotti dal legislatore italiano negli ultimi anni. Dopo aver individuato una pluralità di cause che potrebbero aver determinato il sostanziale insuccesso di tali strumenti, l’autore propone alcune azioni ritenute necessarie per la vitalità del sistema italiano della mediazione e della negoziazione assistita.The paper analyzes the results relating to the use of ADR methods introduced by the Italian legislator in recent years. After identifying a plurality of causes that could have caused the substantial failure of these instruments, the author proposes some actions deemed necessary for the vitality of the Italian ADR system
Giustizia civile e classifiche internazionali: eterogenesi dei fini del legislatore?
No full textLo scritto analizza alcune modifiche normative attinenti al processo civile recentemente adottate dal legislatore con il fine dichiarato di migliorare il piazzamento dell’Italia nei reports Doing Business della Banca mondiale. Secondo l’autore l’insieme di tali misure realizza l’effetto di disincentivare eccessivamente e incongruamente l’esercizio del diritto di azione e di difesa, rischiando di sacrificare sull’altare dell’economia la tensione verso la giuridicità stessa dell’ordinamento.The paper analyzes some reforms of the civil justice system recently adopted by the Italian legislator with the stated aim of improving Italy's placement in the World Bank's Doing Business reports. According to the author, the set of new measures has the effect of discouraging excessively and incongruously the exercise of the right to action and defense, risking to sacrifice the tension towards the juridical nature of the Italian legal order on the altar of the economy
Uma solução alternativa para prorrogação da vida útil dos rebocos com salinidade em edifícios históricos
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de ProduçãoA degradação e a restauração de argamassas de rebocos, especialmente em edifícios históricos é uma realidade. Dentre os problemas mais freqüentes apresentam-se aqueles decorrentes da umidade, que algumas vezes, podem conter um determinado teor de salinidade. Quando estes sais têm um alto grau de solubilidade e estão permanentemente numa situação de cristalização e hidratação, podem provocar a incorporação de água na sua estrutura molecular, aumentando o seu volume e causando uma desagregação dos materiais constituintes da argamassa. A solução mais adequada é a eliminação da umidade e/ou dos sais. Infelizmente isso nem sempre é possível devido às condições construtivas do edifício. Uma alternativa é a confecção de uma argamassa especial que permita o crescimento destes sais no seu interior, propiciando uma vida mais longa aos revestimentos
El usuario en la lexicografía fraseológica bilingüe
No full textLa presencia de la fraseología en los diccionarios bilingües generales italoespañoles es cada vez mayor. Su tratamiento, sobre todo en los repertorios del s. XXI, ha mejorado notablemente con la introducción de información de distinto tipo en función de las necesidades de sus usuarios. En este trabajo nos proponemos estudiar la modalidad empleada para presentar dichas expresiones y el tipo de información incluida con el fin de valorar su eficacia en un repertorio fraseológico. Nos ocupamos fundamentalmente del último diccionario de fraseología aparecido en el panorama italiano, se trata del Diccit Diccionario combinatorio español-italiano A-K. de Simone Greco (2019), aunque hacemos mención a una obra antecedente publicada en 2013 y cuyos autores son Sañé/Schepisi. Atenderemos tanto a la información gramatical como a la pragmática y de especialidad
La SPECT con Tc-99m MIBI nella identificazione del miocardio vitale in pazienti con cardiopatia ischemica cronica e disfunzione ventricolare sinistra
No full textResting 99mTc-MIBI cardiac imaging may be poorly accurate in identifying the presence of viable myocardium in patients with chronic coronary artery disease (CAD). In this study, we directly compared the results of resting 99mTc-MIBI SPECT with initial (1 hr) and delayed (5 hrs) images with those of 99mTc-MIBI SPECT after nitroglycerine (NTG) administration in 31 patients with chronic CAD. All patients also underwent rest-redistribution thallium-201 (201Tl) SPECT. In 8 patients, echocardiography was performed before and after coronary revascularization (Rev). Of 682 myocardial segments, 197 showed a marked reduction ( or = 10%) was increased in 47 (24%) segments on delayed images (from 43 +/- 8% to 60 +/- 8%, p < 0.001) and in 54 (27%) segments after NTG (from 42 +/- 8% to 60 +/- 8%, p < 0.001). The results of delayed and NTG MIBI images were in agreement in most segments (n = 160, 81%). The results of delayed and NTG MIBI images were in disagreement in the remaining 37 (19%) segments. In particular, 15 segments showed reversible defects on delayed, but not on NTG MIBI images, while 22 on NTG, but not on delayed MIBI images. All the segments with reversible MIBI defects on delayed and/or NTG images were identified as viable on TI-201. In the 8 pts examined before and after Rev. 83% of segments with reversible MIBI defects on delayed images and 87% of those with reversible defects after NTG showed functional recovery after Rev; furthermore, in these patients a significant improvement in global left ventricular function was observed after Rev, as shown by ejection fraction values (from 42 +/- 7% to 47 +/- 7%, p < 0.01). These comparative results show that resting delayed and NTG MIBI imaging provide similar information to identify viable myocardium and to predict functional recovery after coronary Rev in chronic CA
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