Search results for " Instruments"
showing 10 items of 187 documents
Position resolution of the prototype AGATA triple-cluster detector from an in-beam experiment
2009
AGATA belongs to a new generation of gamma-ray detector arrays for nuclear spectroscopy at present in its final stage of development. The detectors of these new arrays will be based on 36-fold electronically segmented coaxial germanium diodes operated in position sensitive mode. An in-beam test of the AGATA prototype triple cluster detector was carried out with the purpose of demonstrating the feasibility of such detectors and in order to measure the most sensitive parameters for their overall performance. An inverse kinematics reaction was performed, using a (48)Ti beam at an energy of 100MeV, impinging on a deuterated titanium tat-get. The results from the analysis of the experimental dat…
Measurement of W-pair production in $e^{+}e^{-}$ collisions at centre-of-mass energies from 183 to 209 GeV
2004
The W + W- production cross section is measured from a data sample corresponding to a total integrated luminosity of 683 pb-1, collected by the ALEPH experiment at LEP at centre-of-mass energies from 183 to 209 GeV. Individual cross sections for the different topologies arising from W decays into leptons or hadrons, as well as the total W-pair cross section are given at eight centre-of-mass energies. The results are found to be in agreement with recently developed Standard Model calculations at the one percent level. The hadronic branching fraction of the W boson is measured to be B(W→qq¯) = 67.13 ± 0.37(stat.) ± 0.15(syst.)%, from which the CKM matrix element |\ensuremathVcs| is determined…
Synchronized photonic modulators driven by surface acoustic waves
2013
Photonic modulators are one of the most important elements of integrated photonics. We have designed, fabricated, and characterized a tunable photonic modulator consisting of two 180 degrees-dephased output waveguide channels, driven by a surface acoustic wave in the GHz frequency range built on (Al,Ga)As. Odd multiples of the fundamental driven frequency are enabled by adjusting the applied acoustic power. A good agreement between theory and experimental results is achieved. The device can be used as a building block for more complex integrated functionalities and can be implemented in several material platforms. (C) 2013 Optical Society of America
El papel del péndulo en el construcción del paradigma newtoniano
1992
This paper shows the important role of one of the most common instruments, the pendulum, in the construction of the newtonian paradigm. From the analysis of some interesting applications carried out by the greatest scientists of that time, we conclude that the appropriate use of the pendulum in the classroom can be an easy way to introduce historical and epistemological evolution of basic physical concepts.
INTEGRAL/SPI ground calibration
2003
Three calibration campaigns of the spectrometer SPI have been performed before launch in order to determine the instrument characteristics, such as the effective detection area, the spectral resolution and the angular resolution. Absolute determination of the effective area has been obtained from simulations and measurements. At 1 MeV, the effective area is 65 cm^2 for a point source on the optical axis, the spectral resolution ~2.3 keV. The angular resolution is better than 2.5 deg and the source separation capability about 1 deg. Some temperature dependant parameters will require permanent in-flight calibration.
Principals instruments utilitzats en psicologia jurídica a través de l’estudi dels articles indexats en la web of science
2017
L’objectiu del present treball és conéixer els principals instruments utilitzats en la Psicologia Jurídica i els temes d’investigació més rellevants a través de l’anàlisi dels articles indexats en les bases de dades de la Web of Science durant i, en concret, de l’any 2014, i que han sigut publicats en revistes incloses en les categories temàtiques Criminology & Penology, Law and Psychology de les bases de dades JCR (SSCI) de l’any 2014. El nombre total d’articles revisats van ser 810. Els resultats revelen que els instruments més emprats són Conflict Tactics Scales, Psychopathy Checklisti Static Risk Matrix. Els trastorns més freqüents en les investigacions van ser el Trastorn per estrés po…
Spectral characterization of laser-accelerated protons with CR-39 nuclear track detector
2018
CR-39 nuclear track material is frequently used for the detection of protons accelerated in laser-plasma interactions. The measurement of track densities allows for determination of particle angular distributions, and information on the kinetic energy can be obtained by the use of passive absorbers. We present a precise method of measuring spectral distributions of laser-accelerated protons in a single etching and analysis process. We make use of a one-to-one relation between proton energy and track size and present a precise calibration based on monoenergetic particle beams. While this relation is limited to proton energies below 1 MeV, we show that the range of spectral measurements can b…
Electrical distribution substation remote diagnosis and control system
2014
This paper presents the conception, design, set up and realization of a prototype system for telemanagement of a MV/LV substation. The prototype has been developed according to the current standards. This system allows to monitor the status of the MV/LV substation box, of the medium voltage equipment, of the transformer and of the low voltage equipment. In particular, the system acts when some specified events occur. The prototype has been realized by using a DAQ; the software that implement the telemanagement system has been developed in LabVIEW environment. The system allows a remote monitoring of the quantities of interest that is carried out using the TeamViewer software able to establi…
Pre-training inter-rater reliability of clinical instruments in an international psychosis research project.
2021
International audience
Rīcībpolitikas pārcelšana: Eiropas Ekonomikas zonas finanšu instrumenta gadījums
2015
Eiropas Ekonomikas zonas finanšu instrumenta mērķis ir sociālās un ekonomiskās nevienlīdzības mazināšana. Pētījumā apskatīti divu plānošanas periodu 2004.-2009 un 2009.- 2014 ietvaros īstenotie prioritārie virzieni, noteikta finansējuma piešķiršanas lietderība, veikta periodu analīze, kā arī sniegts pamatojums finansējuma turpmākai piešķiršanai. Pētījumā norādītie dati liecina par esošās situācijas uzlabojumiem, ļaujot noteikt prioritāros virzienus nākošo plānošanas periodu izstrādē. Maģistra darba centrālā problēma tiek ietverta darba hipotēzē - Rīcībpolitikas pārnesi Eiropas Ekonomikas zonas finanšu instrumenta kultūras programmu gadījumā regulē donorvalstu Norvēģijas, Lihtenšteinas un Is…