A5070314939- Adaptive optics and wavefront sensing
- Phase Equilibria and Thermodynamics
- Advanced optical system design
- Chemical Thermodynamics and Molecular Structure
- Scientific Measurement and Uncertainty Evaluation
- Water Quality Monitoring and Analysis
- Analytical Chemistry and Sensors
- Spacecraft Design and Technology
- Thermodynamic properties of mixtures
- Optical Systems and Laser Technology
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Advanced Sensor Technologies Research
- Spectroscopy and Quantum Chemical Studies
- Particle Detector Development and Performance
- Calibration and Measurement Techniques
- Oceanographic and Atmospheric Processes
- Spacecraft and Cryogenic Technologies
- Optical Coatings and Gratings
- Radiation Detection and Scintillator Technologies
- Fault Detection and Control Systems
- Chemical and Physical Properties in Aqueous Solutions
- Engineering Applied Research
- Electrical and Bioimpedance Tomography
- Marine and coastal ecosystems
Istituto Nazionale di Ricerca Metrologica
2012-2023
Polytechnic University of Turin
2014-2016
Abstract Equations of state for n -hexadecane (C 16 H 34 ) and -docosane 22 46 have been developed as functions the Helmholtz energy with independent variables temperature density. The equations were based on experimental values density, speed sound, isobaric heat capacity, vapor pressure. With these equations, all thermodynamic properties can be calculated. For -hexadecane, uncertainty in pressure is 0.5 %. saturated liquid density 0.05 % from triple point up to 400 K, 0.2 at higher...
Salinity is an essential quantity to calculate many of the physical properties oceans, but it also a hard define considering complexity this material in its bio-geo-chemical composition and imperfections existing measurement techniques. The TEOS-10 gives several definitions notion absolute salinity, usable function study, they are based on concept constant elemental seawater, so that, if major inorganic components well known, real varies time space determination still challenge.
A novel kind of pycnometer was designed for liquid density measurements suitable to be used over wide ranges temperature and pressure. Two similar pycnometers have been manufactured tested with n-nonane 99.7 mol% in the range from 233 K 313 at pressure lower than 10 MPa. To validate procedure, experimental values an sample compared given literature by means En number.
Adaptive or active elements can alter their shape to remove aberrations shift focal points. Carbon fiber reinforced polymer (CFRP) material improves upon current mirror materials, such as Zerodur, in several ways: low stiffness-to-weight ratio, very hysteresis, and greater dynamic range of correction. In this paper, we present recent developments CFRP actuation, i.e., changing the mirror's an accurate repeatable fashion. Actuation methods are studied both theoretically, using finite element...
In this work, accurate density measurements of subcooled water (freshly double-distilled water) were performed along eight constant-mass curves in the temperature range (243 to 283) K and pressure (140 400) MPa, by a pseudo-isochoric method. The experimental apparatus mainly consisted high vessel, especially designed for experiment, known volume as function pressure, used perform T-p under study. was obtained measuring equilibrium at different temperatures, keeping mass constant. All terms...
Radiation effects are well know to cause significant degradation in polymer materials. Low earth orbit (LEO) radiation exposures ionization potentials that can undermine mechanical properties of polymers. In particular, small scale degradations carbon / composite mirrors used imaging applications. High specularity surface finish is required for optical and vulnerable thereby undermining the performance mirror environment. Experiments involving its on replicated carbon/polymer will be...
We report on the optical performance of carbon fiber reinforced polymer composite (CFRP) mirrors after 1.49 years exposure onboard Materials International Space Station Experiment (MISSE 7). Mirror samples were placed MISSE 7A tray, outside ISS from October 2009 and retrieved September 2011. The environment was an extreme test, which is considered "worst case" for survivability imaging applications in low-earth orbit (LEO) results testing returned flight show degradation two mirror's...
Measurements of compressed liquid density and speed sound have been performed in cis-1-chloro-2,3,3,3-tetrafluoro-1-propene, also known as R-1224yd(Z). Density has measured the temperature range from 273.15 K to 353.15 for pressure up 35 MPa. The relative expanded uncertainty (k=2) obtained results estimated be better than 0.05%. Speed 263 353 these measurements 0.06%. Using properties this work including vapor ideal gas specific heat capacity published scientific literature, a Patel-Teja...
In this work, the experimental results of deuterium oxide density at high pressure and in a wide range temperatures, by means pseudo-isochoric method, are presented. A specific stainless steel cell was devised to be used as pycnometer filled with variable mass heavy water. The latter measured weighing an analytical balance using substitution method. volume pycnometric gravimetric method corrected for effect temperature pressure. Each measurement cycle performed constant mass, measuring...
Seawater density has a great importance in the oceanographic science, since it can be used for salinity determination, if is known with necessary accuracy. For that reason, review of methods measurements suitable seawater presented. Furthermore, this work standard measured at different practical salinities (from 9.997 to 37.999) temperature range between (278.15 308.15) K ambient pressure. Measurements are carried out by means vibrating tube densimeter and following substitution method...
The improvement of modern oscillation-type density meters requires reference liquids with low uncertainty and very accurate procedures that take into account the physical properties fluids. INRIM adopted a procedure concerning substitution method in determining densities by vibrating tube densimeter deuterated water, n-pentadecane oil EF 170 having viscosity approximately mm²/s, provided pilot laboratory BEV as transfer standards EURAMET project 1240. In present paper are shown an example...