2,462 research outputs found
The UNISA folded pendulum: A very versatile class of low frequency high sensitive sensors
No full textAn effective evaluation of the static and dynamic structural status of historical monuments for health evaluation and long term preservation requires the analysis of their low frequency dynamic behavior (<1Hz). The UNISA folded pendulum class of sensors (Barone and Giordano, 2015), based on the Watt's linkage, developed at the University of Salerno and already successfully applied to the monitoring of large infrastructures and buildings, including historical monuments, can provide this information with the accuracy required for an effective tuning of numerical simulation models. In fact, the low frequency region, curiously yet generally unexplored, contains a large quantity of information very useful for understanding and anticipating structural dynamical changes of the infrastructures that will occur and manifest at higher frequencies also after long periods of time, enabling to schedule well in advance all the interventions necessary to prevent structural damages, and reducing, at the same time, the risks for the population. In this paper, after a description of the mechanical architecture, characteristics and performances of this class of sensors, the attention is focused on UNISA folded pendulum implementations in connection with applications to large infrastructures and buildings
THE VISIBLE TRANSLATOR: FABRIZIO DE ANDRE' TRANSLATES LEONARD COHEN
No full textTHE ARTICLE DISCUSSES THE NOTION OF SONG LYRICS TRANSLATION/ADAPTATION. IT FOCUSES ON FABRIZIO DE ANDRE'S VISIBLE TRANSLATIONS OF LEONARD COHEN'S LYRICS. ITS TRANSLATIONS REPLACE THE SEARCH FOR EQUIVALENCE WITH AN INNOVATIVE TURNING AWAY FROM THE SOURCE TEXT, NEGOTIATING MEANING WITH AN EXTENSIVE USE OF METAPHORS AND A DENSITY IN LEXICAL CREATIVITY. THE PROCESS OF TRANSLATION THUS BECOMES AN AESTHETICAL RE-INTERPRETATION OF THE ORIGINAL TEXT, AIMING AT REPRODUCING ITS SAME POETICAL RHYTHM AND ATMOSPHERE
Relevance of Environmental Factors in the Steel Life Cycle for a Transition toward Circular Sustainable Production and Consumption Systems: A Joint Bibliometric and Bibliographic Analysis
No full textThe design of steel structures has evolved thanks to the increased ability to model the
behavior of more complex structures. However, further constraints arise from the need for a transition toward more sustainable production and consumption systems. In particular, the assessment of the economic benefits and efficiency of existing production systems should be integrated with assessment of environmental, economic and social sustainability. In the case of steel, and limited to the environmental dimension, the literature covers various study areas, ranging from the analysis of resource flows to the assessment of steel’s environmental impacts. However, an integrated view of existing peer-reviewed studies is currently missing. The purpose of this work is to overcome this shortcoming with a review that considers and integrates research on the steel life cycle from various perspectives: analysis of material flows; quantification of emissions; environmental monitoring and indicators; and circular economy aspects, including reuse and recycling. This study is based on a deep bibliometric and bibliographical analysis of the above-cited aspects, including the key topics, authors and journals, to single out some potential research directions that have previously been neglected. The results of the analyses indicate that, even though discussed in the literature, the redesign of products is still lacking adequate consideration. The same gap was also evidenced when it came to studies on the management of waste materials and recommissioning. There is also still a lack of knowledge on the possible meaningful indicators of environmental sustainability in the case of steel. Moreover, while digital technologies that enable sustainability are being intensely developed and widely implemented, the design, testing and application of sensors for the environmental monitoring of steel production is under-studied and the interaction of environmental factors with steel structures is poorly addressed. Finally, this work evidenced poor attention with respect to water and soil pollution generated in different phases of the steel life cycle. All these aspects should be considered in future research, which would also have a beneficial effect in the implementation of informed policies for a transition toward a circular and sustainable steel life cycle
A new class of compact high sensitive tiltmeter based on the UNISA folded pendulum mechanical architecture
No full textPendolo ripiegato a bassa frequenza con elevato fattore di qualità meccanico, e sensore sismico utilizzante tale pendolo ripiegato (LOW FREQUENCY FOLDED PENDULUM WITH HIGH MECHANICAL QUALITY FACTOR, AND SEISMIC SENSOR UTILIZING SUCH A FOLDED PENDULUM)
No full textThe invention concerns a folded pendulum, comprising: - a support (F); - a test mass (PM); - a simple pendulum (SP); - an inverted pendulum (IP); the simple pendulum and the inverted pendulum being connected at one of their ends to the test mass (PM) and at the other end to the support (F) by means of 4 corresponding joint systems (G), the test mass being not connected to the support (F) and being therefore free to oscillate, each joint system (G) relevant to the simple pendulum (PS) comprising one or more joints in tension, the folded pendulum being characterised in that: each of the joint systems (G) relevant to the inverted pendulum (IP) comprises one or more joints in compression. The invention further concern a seismic sensor utilizing the folded pendulum according to the invention
Metodo delle transizioni di fase per la misura del sar in risonanza magnetica per immagini
No full textDurante un esame diagnostico di Risonanza Magnetica per Immagini, il paziente è sottoposto ad impulsi a radiofrequenza la cui potenza trasmessa si traduce in un riscaldamento dei tessuti. Il SAR (Specific Absorption Rate) è il principale parametro assunto quale riferimento per il controllo degli effetti termici legati ad un’esposizione a radiofrequenza, in quanto utilizzato per una stima dell’incremento di temperatura nei tessuti esposti. Severi limiti ai livelli di SAR sono posti dalle normative per la sicurezza del paziente, sia italiane sia internazionali, ed è fatto obbligo, dalle stesse normative, la misura del SAR per verificarne il rispetto. Il Metodo delle Transizioni di Fase per la Misura del SAR è un metodo innovativo, che utilizza le proprietà delle transizioni di fase per una misura indiretta della potenza assorbita da un oggetto di prova, recipiente contenente una soluzione con proprietà dielettriche e di conducibilità elettrica simili a quelle della regione anatomica di interesse (fantoccio). Esso prevede solo misure di massa e di tempo. La procedura richiede un fantoccio, due tipi di provette con diversa funzionalità ed un sistema di fissaggio del ghiaccio a corredo delle provette, il tutto progettato per l’ottimizzazione del metodo
Metodo per la lavorazione di lamine e giunti elastici sottili, in particolare per la realizzazione di oscillatori meccanici monolitici (METHOD FOR MACHINING THIN PLATES AND ELASTIC JOINTS PARTICULARLY FOR MONOLITHIC MECHANICAL OSCILLATORS )
No full textThe present invention relates to a method for manufacturing thin metal sheets and joints (230J) by removing material from a single block of material (200), i.e. for obtaining items consisting of one or more thin sheets and/or thin elastic joints seamlessly connected to one another by means such as milling. The method can be employed in the manufacturing of a high-sensitivity, low-frequency, broadband monolithic mechanical sensor for measuring linear and angular displacements of based on a folded pendulum configuration for monitoring and control applications
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