197,799 research outputs found
Special Issue — From Foundations of Quantum Mechanics to Quantum Information and Quantum Metrology & Sensing, “Quantum 2017”; Author Index Volume 15 (2017)
No full textM. C. Rinaudo. — Il Risorgimento italiano. — Turin, Olivero, 1910
No full textDejob Charles. M. C. Rinaudo. — Il Risorgimento italiano. — Turin, Olivero, 1910. In: Revue internationale de l'enseignement, tome 61, Janvier-Juin 1911. pp. 469-470
Assessment of a Dual-Wavelength Compensation Technique for Displacement Sensors Using Plastic Optical Fibers
No full textThe paper analyzes the performance of a dual-wavelength technique devised to compensate power fluctuations in intensity-modulated plastic optical fiber sensors, which were specifically conceived for the measurement of displacements in industrial and civil applications. These sensors retrieve the displacement from the variation of the attenuation along the light path and use two signals at different wavelengths to compensate for the effects of parasitic quantities, such as temperature and strains along the fiber. The theoretical behavior of the compensation technique is presented, and the results of experiments carried out with different combinations of signal wavelengths and plastic fibers are reported. The experimental setup has proved that, by proper choice of the compensation signal wavelength, it is possible to monitor displacements in the range (0 to 10) mm, even for low received power and under severe perturbation conditions, thus significantly improving the long-term stability of the sensor
On the semantics of artifactual kind terms
No full textThis paper aims to provide a thorough overview of the ongoing debate about whether artifactual kind terms (such as ‘pencil,’ ‘chair,’ ‘television,’ and so on) have a directly referential or descriptivist semantics. Hilary Putnam (1975) originated the mentioned debate by arguing that artifactual kind terms refer directly - as natural kind terms (like ‘water,’ ‘tiger,’ ‘gold,’ etc.) do - that is, a direct, external relation between the terms and the world determines their extension. However, terms for artifactual kinds appear more likely subjected to a descriptivist view, that is to be defined in terms of conjunctions or clusters of properties. The paper offers a reasoned survey of this debate by pointing out trends and problems associated with each proposed account on the matter. What kind of reference (if any) do terms such as “pencil,” “chair,” “television,” and so on have? On the matter, a debate between directly referential theorists and descriptivist theorists is open. It is largely acknowledged that natural kind terms (such as “water,” “gold,” “tiger,” etc.) are directly referential expressions (cf. Putnam, 1975). That is, they are expressions whose reference is determined by their referents' nature, independent of whether we know or will ever know what this nature is. However, it does not seem likewise convincing that all artifactual kind terms (like “pencil,” “chair,” “television,” etc.) semantically behave the same. Terms for artifactual kinds seem more likely to be subject to a descriptivist view, that is definable not by links to their extensions' nature but in terms of conjunctions or clusters of properties. In his celebrated “The Meaning of ‘Meaning’” (1975), Hilary Putnam originated the mentioned debate by arguing that artifactual kind terms also refer directly. Thus, the discussion ultimately revolves around establishing whether artifactual and natural kind terms are both directly referential expressions. The authors engaged in this debate have tried to argue in favor of (or against) Putnam's proposal by highlighting the similarities (or differences) between natural vis-à-vis artifactual kind words and their respective referents. This paper aims to provide a thorough and reasoned overview of the debate at stake, pointing out trends and problems associated with each proposed account
Reflux esophagitis in three cats associated with metaplastic columnar esophageal epithelium
No full textGastroesophageal reflux is a relatively common condition in dogs and cats and may lead to secondary reflux esophagitis. A consequence of chronic gastroesophageal reflux that is well described in humans is Barrett's esophagus, which is the replacement of the normal squamous epithelium of the distal esophagus with metaplastic columnar epithelium. Three cats with clinical and endoscopic signs of chronic esophagitis had metaplastic columnar epithelium on biopsy of the distal esophageal mucosa. Suspected underlying causes were cardial incompetence and sliding hiatal hernia. Two cats had complete resolution of the clinical signs after treatment. One cat was euthanized
UV Written 2x8 Optical Power Splitter for FTTH Applications
No full textSilica based integrated optical 2x8 power splitters are reported for the first time using UV-writing waveguide fabrication technology. High performance, compactness and low production costs make these components well suited for deployment in FTTH networks
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