Search results for "IPR"
showing 10 items of 1515 documents
Unidirectional reflection from an integrated "taiji" microresonator
2020
We study light transmission and reflection from an integrated microresonator device, formed by a circular microresonator coupled to a bus waveguide, with an embedded S-shaped additional crossover waveguide element that selectively couples counter-propagating modes in a propagation-direction-dependent way. The overall shape of the device resembles a "taiji"symbol, hence its name. While Lorentz reciprocity is preserved in transmission, the peculiar geometry allows us to exploit the non-Hermitian nature of the system to obtain high-contrast unidirectional reflection with negligible reflection for light incident in one direction and a significant reflection in the opposite direction.
Testing electromagnetic proton form factors in the annihilation process p+p¯→π0+e−+e+
2011
We study the annihilation channel in proton antiproton collisions with production of a single neutral pion and an electron-positron pair. It is shown that this reaction allows access to the proton electromagnetic form factors in the ‘unphysical’ region and to the difference between complex phases of the Dirac and Pauli proton form factors. The differential cross section is given in the laboratory frame in an experimental setup where all outgoing particles are fully detected.
Compton imaging with AGATA and SmartPET for DESPEC
2011
DESPEC (DEcay SPECtroscopy) is a spectrometer, currently under construction, which is to be used at the FAIR (Facility for Antiproton and Ion Research) facility at GSI Darmstadt, Germany, as part of the NuSTAR (Nuclear STructure, Astrophysics and Reactions) project. Its goal is to analyse the decay of exotic nuclei produced via the Super-FRS (SUPERconducting FRagment Separator). The optimal configuration of certain elements of the spectrometer, namely a HPGe (High Purity Germanium) tracking array, is still under consideration. Work currently being carried out at the University of Liverpool using a segmented, coaxial HPGe detector (AGATA B009) and a pixelated, planar HPGe detector (SmartPET …
Microscopic theory of glassy dynamics and glass transition for molecular crystals.
2004
We derive a microscopic equation of motion for the dynamical orientational correlators of molecular crystals. Our approach is based upon mode coupling theory. Compared to liquids we find four main differences: (i) the memory kernel contains Umklapp processes, (ii) besides the static two-molecule orientational correlators one also needs the static one-molecule orientational density as an input, where the latter is nontrivial, (iii) the static orientational current density correlator does contribute an anisotropic, inertia-independent part to the memory kernel, (iv) if the molecules are assumed to be fixed on a rigid lattice, the tensorial orientational correlators and the memory kernel have …
"Table 8" of "Measurement of the low-energy antideuteron inelastic cross section"
2020
Raw primary antiproton-to-proton ratio from Geant4-based MC simulations as a function of the momentum p_primary (exp. data).
"Table 2" of "Measurement of the low-energy antideuteron inelastic cross section"
2020
Raw primary antiproton-to-proton ratio from Geant4-based MC simulations as a function of the momentum p_primary.
"Table 1" of "Measurement of the differential cross section d\sigma/dt in elastic $p\bar{p}$ scattering at sqrt(s)=1.96 TeV"
2015
The $d\sigma$/$dt$ differential cross section. The statistical and systematic uncertainties are added in quadrature.
Pareizas stājas veidošana vecākā pirmsskolas vecuma bērniem sporta nodarbībās
2017
Autore: Santa Grāvelsiņa Pētījuma tēma: Pareizas stājas veidošana vecākā pirmsskolas vecuma bērniem sporta nodarbībā. Pētījuma mērķis: teorētiski analizēt un praktiski pētīt stāju, stājas traucējumus, stājas nostiprināšanu sporta nodarbībās. Darba vadītāja: Vec. pasn. Dr. paed. Inta Bula-Biteniece Darba apjoms: 53 lappuses, 5 attēli, 2 tabulas, 4 pielikumi. Darbs sastāv no 3 daļām: 1.daļā tiek raksturota pirmsskolas vecuma bērnu kustību un balsta sistēma. 2. daļa sastāv no divām apakšnodaļām, kur pirmajā apakšnodaļā tiek aprakstīti stājas veidi. Otrajā apakšnodaļā tiek aprakstīti stājas traucējumi, faktori, kuri nelabvēlīgi ietekmē bērna pozu un līdz ar to arī stāju. Analizēta pedagoģiskā u…
Engaging Reciprocity from the Complainant Customer in the Digital Age
2019
International audience
Pointwise resolutive significance of data and applications in experimental design and data treatment
1992
Abstract The concept of the resolutive significance of a point in a data set with regard to a number of addressed parameters is introduced, and two algorithms able to measure it are proposed. The algorithms are validated using simulated experiments. The sum of all the pointwise resolutive significances of a data set is also proposed as a measure of the resolution of the data set. This sum correlates well with the reciprocal of the standard deviation of the fitted parameters, indicating the precision that can be expected for each parameters. Applications in experimental design, and a method for establishing the weights in the least-quarters regression analysis are discussed.