Search results for "meter"

An experimental campaign to investigate sustainability issues in Single Point Incremental Forming processes

2012

Sustainability issues are crucial topics in manufacturing and the environmental burdens reduction for processes is highly requested. In particular, the environmental sustainability evaluation for sheet metal forming processes is an widely investigated topic since there is still a lack of knowledge on modeling issues. The main tasks are related to a more efficient materials use and to energy savings. Moreover, forming technologies environmental impacts are essentially process-dependent. A deep analysis of the cause-effect linkages (between process and material parameters and energy consumption, for instance), within each process, would be necessary to properly model environmental impacts and…

Riferibilità dei contatori statici di energia reattiva in presenza di armoniche. Evoluzione normativa e prove sperimentali

2013

Traceability of static reactive energy meters in the presence of harmonics: theoretical considerations and a DAQ-based reference meter

2013

This paper deals with some problems related to the measurements traceability with static meters for reactive energy. These problems arise when the meters operate in the presence of harmonics, which can negatively affect their performances, depending on implemented metric. The paper analyzes the problem in the light of both in-force and draft standards, from the viewpoint of the performances of both commercial meters and reference standard instruments. The analysis is supported by some experimental tests, which are carried out by means of a reference meter, based on data acquisition boards, which can be used in both sinusoidal and distorted conditions.

On the calibration of reactive energy meters under non sinusoidal conditions

2009

This paper is focused on the problems related to the calibration of the reactive energy meters on the place of installation of the electricity meter (on-site), using the load of the same electrical system. In the presence of harmonic distortion, the behaviour of the meters can go out of the limits imposed by the theoretical calibration curve depending on the metric used by both reference standard meters and meters under test.

L’ampliamento come occasione di recupero della memoria e dell’identità

2012

We present the enlargement plan of an isolated cemetery in a small town of the west Sicily as it exemplifies some way to carry out the design for an “addition”. The enlargement faces a still readable and characteristic nineteenth-century building. Even introducing unavoidable innovative characteristics, the architecture we designed tries to resolve the difficult relationship between the new portion and the old cemetery, bell shaped, in steep slope above the town. The recovery of this place for collective memory, once realized as a closed enclosure, is realized by the mediation of a space which seeks to maintain, recover and reinforce the identity of places altered in the last years by uncon…

SMOS-IC: An Alternative SMOS Soil Moisture and Vegetation Optical Depth Product

2017

© 2017 by the authors. The main goal of the Soil Moisture and Ocean Salinity (SMOS) mission over land surfaces is the production of global maps of soil moisture (SM) and vegetation optical depth (τ) based on multi-angular brightness temperature (TB) measurements at L-band. The operational SMOS Level 2 and Level 3 soil moisture algorithms account for different surface effects, such as vegetation opacity and soil roughness at 4 km resolution, in order to produce global retrievals of SM and τ. In this study, we present an alternative SMOS product that was developed by INRA (Institut National de la Recherche Agronomique) and CESBIO (Centre d'Etudes Spatiales de la BIOsphère). One of the main go…

The Born–Oppenheimer equilibrium bond distance of GeO from millimetre- and submillimetre-wave spectra and quantum-chemical calculations

2014

The millimetre- and submillimetre-wave spectra of the five common isotopologues of (GeO)-O-16 in their electronic and vibrational ground state have been recorded in the spectral region 115-732GHz; for (GeO)-Ge-74-O-16, the rotational spectrum in the v = 1 state has been detected as well. Exploiting the high precision of the measurements, the Born-Oppenheimer breakdown parameter Delta(Ge)(01) could be determined from a Dunham analysis of the spectral data, whereas Delta(O)(01) was obtained from quantum-chemical calculations, because of the lack of high-precision measurements for the (GeO)-O-18 isotopologues. From the rotational equilibrium constant, the Born-Oppenheimer equilibrium distance …

Rotational spectrum of silyl chloride: hyperfine structure and equilibrium geometry

2012

The Lamb-dip technique was employed to record the rotational spectra of two isotopic species of silyl chloride, namely (28)SiH3Cl and (29)SiH3Cl, in order to investigate their hyperfine structure. High-accuracy quantum-chemical computations were employed to predict the hyperfine parameters involved and to support the experimental investigation. Analysis of the experimental spectra led to an improvement in the accuracy of the known spectroscopic constants as well as allowed us to determine additional spectroscopic parameters for the first time. Furthermore, the equilibrium structure of silyl chloride was reinvestigated using both theoretical and experimental data. The best theoretical and se…

Diseño físico-matemático de un espectrómetro óptico

2016

[EN] This work presents the design and construction of a spectrometer made in the laboratory and the development of mathematical models needed to process and analyze the acquired spectrum. For modeling functions it has been used LabVIEW program. The aim is to bring this type of instrumentation to engineering students from both, physical and mathematical point of view. The application has been successfully integrated in the learning strategies of the course Sensores Fisicos, Master Universitario en Sensores Para Aplicaciones Industriales at the Universitat Politecnica de Valencia. As an example, we have characterized different light sources emitting in different regions of the electromagneti…

Comparación del Vitalograph COPD-6® y del Air Smart Spirometer® con la espirometría estándar en el despistaje y el diagnóstico de los pacientes con E…

2020

La enfermedad pulmonar obstructiva crónica (EPOC) está infradiagnosticada aunque mejora su evo- lución y pronóstico si se trata precozmente y su principal tratamiento es la abstinencia tabáquica. El objetivo principal de este estudio es comparar los espirómetros de campo COPD-6 ® (Vitalograph) y Air Smart Spirometer® con la espirometría estándar en el diagnóstico de la obstrucción bronquial. Los objetivos secundarios son: determinar cuál de los dos espirómetros estudiados es más eficaz y/o eficiente; detectar los falsos positivos que generan y valorar su aportación a la deshabituación tabá- quica. Participaron 185 pacientes del Centro de Salud Fuensanta con o sin síntomas o signos sugestivo…