2,632 research outputs found
Optimization of Dielectric Excitation for Metal Oxide Sensors: Simulation and Experimental Results
No full textThis study assesses the agreement in terms of linearity errors between simulated and experimental data from MOX sensors operated in dielectric excitation mode. Both simulated and experimental reactance spectra exhibit high linearity with respect to gas concentration in the high-frequency shoulder of the relaxation peak. The results demonstrate strong agreement between simulated and experimental 95% CI of absolute linearity errors as a function of frequency. As expected, the empirical errors are slightly bigger compared to the simulation prediction, since the latter only considers the linearity errors. The good correspondence between simulations and empirical results supports the use of simulation to optimize the tuning capacitor and the selection of the optimal operating frequency
Physical Confounding Factors Affecting Gas Sensors Response: A Review on Effects and Compensation Strategies for Electronic Nose Applications
No full textElectronic noses (e-noses) are devices based on combining different gas sensors' responses to a given sample for identifying specific odor fingerprints. In recent years, this technology has been considered a promising novel tool in several fields of application, but several issues still hamper its widespread use. This review paper describes how some physical confounding factors, such as temperature, humidity, and gas flow, in terms of flow direction and flow rate, can drastically influence gas sensors' responses and, consequently, e-nose results. Among the software and hardware approaches adopted to address such issues, different hardware compensation strategies proposed in the literature were critically analyzed. Solutions related to e-nose sensors' modification, design and readout, sampling system and/or chamber geometry design were investigated. A trade-off between the loss of volatile compounds of interest, the decrease of sensors' sensitivity, and the lack of fast responses need to be pointed out. The existing body of knowledge suggests that the e-nose design needs to be highly tailored to the target application to exploit the technology potentialities fully and highlights the need for further studies comparing the several solutions proposed as a starting point for the application-driven design of e-nose-based systems
Who is the author of the 1876 Stefano manuscript?
No full textFor over one hundred years the Stefano manuscript was a private document in the possession of the Baccich family and descendants. It told a story of the 1875 Stefano shipwreck as narrated by the shipwreck survivor and the founding family patriarch Miho Baccich. In these circumstances the question of authorship of the manuscript was immaterial and did not arise as an issue. However, with the publication of the manuscript the author‟s name, or names, need to be formally attributed to it. It turns out that this is not such a clear-cut matter.
As we shall see, all informed sources attributed the authorship, and the ownership, of the manuscript to Miho Baccich. But the manuscript itself was written by Canon Stjepan Skurla – a priest from Miho‟s hometown of Dubrovnik. The question then arises: should Skurla also be considered as an author of the manuscript, or, even as the sole author (as some would have it)
Fashion Culture: Power In Fashion with Stefano Tonchi and Grazia d'Annunzio
No full textStefano Tonchi, global chief creative officer for L’Officiel Group, and Grazia d’Annunzio, former deputy director of Vogue Italia, discuss the power of military uniforms and their influence on high fashion. Tonchi is co-author of the book "Uniform: Order and Disorder.
Introduzione [a I cartolari del notaio Stefano di Corrado di Lavagna]
No full textSaggio introduttivo all’edizione dei frammenti dei protocolli del notaio Stefano di Corrado di Lavagna nel quale viene fatta l’analisi codicologica dei frammenti e si ricostruisce la biografia del notaio. Vengono inoltre esaminate la tipologia dei documenti, le tecniche redazionali del notaio e l’organizzazione burocratica della Chiesa genovese nella seconda metà del secolo XIII.
Introduction essay to the edition of the fragments of the protocols of the notary Stefano di Corrado of Lavagna in which the analysis of the codex fragments and reconstructs the biography of the notary is made by the author. She also examined the types of documents, the technical drafting of the notary and the bureaucratic organization of the Church of Genoa in the second half of the thirteenth century
From Lausanne to Luxembourg: the CJEU’s Seraing Judgment and the Boundaries of Sports Arbitration Under EU Law
No full textIn this expert analysis, Professor Stefano Bastianon dissects the CJEU’s landmark Seraing ruling (Case C-600/23), which reshapes the contours of sports arbitration under EU law. With particular focus on judicial review and EU public policy, the author explores how the Court balances the autonomy of arbitral mechanisms like CAS with the imperative of effective judicial protection — a judgment that could have far-reaching implications for the future of dispute resolution in sport
Recensione di Robert G. La France, Bachiacca: artist of the Medici court, Firenze, Olschki, 2008
No full textABSTRACT ITALIANO
Francesco Ubertini detto il Bachiacca ebbe scarsa fortuna critica ma questo volume di Robert G. La France colma una lacuna grave nella critica d’arte con una solida monografia in lingua inglese che prende in esame tutte le opere e i documenti di questo pittore. Stefano Colonna giudica positivamente il libro, pubblicato da Leo Olschki, limitandosi a sottolineare che alcune opere, inserite come autografe dall’autore, presentino differenti qualità.
ENGLISH ABSTRACT
Francesco Ubertini called Bachiacca has had little critical fortune, but this book by Robert G. La France fills a serious lacuna in art criticism with a solid English monograph that examines all the existing works and documents. Stefano Colonna welcomes the book published by Leo Olschki and simply points out that some of the works included by the author as autograph have a different quality
Temperature and Humidity During Different Neonatal Respiratory Support Modes: An In‐Vitro Performance of Four Heated Humidifiers
No full textBackground: Adequate heating and humidification of inspired gas are crucial in preterm infants requiring respiratory support. Our objective was to compare the temperature (T) and absolute humidity (AH) achieved with different neonatal heated humidifiers commonly used during different respiratory support modes and respiratory settings. Methods: Four neonatal heated humidifiers were tested at different gas flow rates and during conventional and high-frequency oscillatory ventilation at clinically relevant settings. The patient was simulated using a neonatal test lung placed in a neonatal incubator warmed at 37°C. Temperature and relative humidity were measured using a thermohygrometer placed proximal to the test lung and used to calculate AH. Results: Measured temperature and humidity varied among heated humidifiers and respiratory support settings. The bias flow was the primary determinant of the measured temperature and humidity: temperature and AH significantly increased with flow. When the flow through the chamber was below 5 L/min the MR950 produced T < 36.7°C and AH < 37 g/m3 proximal to the patient. The Hydraltis 9500neo with chamber and proximal temperature set to 38°C and 40°C and the MR850 produced AH > 44 g/m3 in most conditions. Conclusion: The temperature and humidity proximal to the patients' airways might vary considerably based on the heated humidifiers and the flow through the chamber. Further clinical studies are needed to evaluate the effect of such variability on the patients
A bench test system for developing E-nose diagnostic tools with exhaled breath sampling
No full textLung diseases are difficult to diagnose, and exhaled breath analysis by electronic nose may represent a useful tool to improve sensitivity and specificity. Preliminary studies showed promising results using commercial E-noses. Limits for direct exhaled breath sampling are related to the effect of flow and temperature on MOS sensors response. In order to optimize sensors responses it is usefuel to control the abovementioned variables. To this aim we proposed a new electronic nose bench test system. We considered an input flow equal to 1 l/s, greater than the maximum expiratory flow during normal breathing. We performed CFD analysis and direct velocity measurement in the position of the sensor. Results confirmed that flow velocity in all the sensors' positions is similar, and the gas is equally spread in all the points of the chamber
The role of theragnostics in oncology: an interview with Stefano Buono
No full text Stefano Buono* speaks to Commissioning Editor, Sebastian Dennis-Beron: Stefano Buono is the Chief Executive Officer, a member of the board of directors, and a founder of Advanced Accelerator Applications (AAA). He has been responsible for overseeing AAA operations, including the development and commercialization of the current portfolio of diagnostic and therapeutic molecular nuclear medicine products, and listing AAA on Nasdaq (stock symbol: AAAP). Prior to founding the company in 2002, he worked as a physicist at the Centre for Advanced Studies, Research and Development, or CRS4, in Italy. During his 6-year tenure with CRS4, he headed a team of engineers working on different international research projects in the field of energy production and nuclear waste transmutation. Before working at CRS4, and alongside his appointment at CRS4, he worked with Physics Nobel Laureate Carlo Rubbia at The European Organization for Nuclear Research (CERN), the world’s largest research laboratory for particle physics, in Geneva, Switzerland. He actively participated in the development of CERN’s Adiabatic Resonance Crossing (ARC) method. He is the author of numerous scientific papers. He received his Master’s degree in Physics from the University of Turin, in Italy, in 1991. </jats:p
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