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Implementers Guide to the WISE Baseline Acceptable Use Policy
Applying the Baseline AUP to concrete use cases may appear straightforward, but there are many edge cases and specific circumstances where it is not entirely obvious how to both achieve the aim of user-friendliness as well as be complete and practical. In this write-up, we try to give hints how to use the WISE Baseline AUP in practice in both community-first as well as ‘user-first’ membership management services
Correlations and currents in studied with the (e,e'pp) reaction
Nucleon-nucleon correlations, especially those of short-range character, can be well studied with electron-induced two-nucleon knockout reactions at intermediate electron energies. However, these reactions are not only driven by one-body currents, i.e.,
coupling of the virtual photon to one of the nucleons of a correlated pair, a process that directly probes NN-correlations. Also
two-body currents, resulting from intermediate Delta-excitation and coupling to exchanged mesons, as well as final state
interactions, influence the experimental cross section. Exclusive measurements of the three-body breakup of 3He offer the
opportunity to compare data to microscopic calculations. The relative importance of competing two-proton knockout
mechanisms can be investigated by varying the energy and momentum of the virtual photon. The experiment was performed
with the electron beam extracted from the Amsterdam Pulse Stretcher (AmPS) at NIKHEF; the incident electron energy was 564
MeV. A cryogenic, high-pressure 3He gas target was used with a thickness of 270 mg/cm^2. Scattered electrons were detected
in the QDQ magnetic spectrometer and both emitted protons in the HADRON plastic scintillator arrays. Cross sections were
determined for three values of the three-momentum transfer of the virtual photon (q=305, 375, and 445 MeV/c) at an energy
transfer value omega of 220 MeV. At q=375 MeV/c, measurements were performed over a continuous range in energy transfer
from 170 to 290 MeV. The data are compared to results of continuum-Faddeev calculations performed by Golak et al., that
account for rescattering among the emitted nucleons. Various potential models were used in the calculations: Bonn-B,
CD-Bonn, Nijmegen-93 and Argonne v18 . Presentation of the data as a function of the missing or neutron momentum, pm,
shows that the cross section decreases exponentially as a function of pm. Calculations performed with only a one-body
hadronic current operator show fair agreement with data obtained at pm < 100 MeV/c at omega = 220 MeV for all q-values. It can
therefore be concluded that at omega = 220 MeV and pm < 100 MeV/c the cross section is dominated by direct knockout of two
protons via a one-body hadronic current. At higher neutron momentum values, data and theoretical predictions differ up to a
factor of five for all values of omega. Within the range of energy transfer values probed in this experiment, the high pm domain
is expected to be strongly influenced by intermediate excitation in the proton-neutron pair. Within specific regions of phase
space, where two nucleons are emitted with comparable momentum vectors, rescattering processes strongly influence the cross
section. For a such a region, measured at q=445 MeV/c, good agreement was found between data and the continuum- Faddeev
calculations as a function of the pn momentum difference in the final state. Information on the wave function of 3He may be
obtained in the domain omega = 220 MeV and pm < 100 MeV/c by representing the cross section as a function of pdiff1, which
can be related to the relative momentum of the constituents of the two-proton pair in the initial state. The observed decrease of
the cross section reflects the behaviour of the wave function and is well reproduced by calculations. At present, the data do
not permit to express preference for any one of the potential models considered
Microphotonic parabolic light directors fabricated by two-photon lithography
We have fabricated microphotonic parabolic light directors using two-photon lithography, thin-film processing, and aperture formation by focused ion beam lithography. Optical transmission measurements through upright parabolic directors 22 μm high and 10 μm in diameter exhibit strong beam directivity with a beam divergence of 5.6°, in reasonable agreement with ray-tracing and full-field electromagnetic simulations. The results indicate the suitability of microphotonic parabolic light directors for producing collimated beams for applications in advanced solar cell and light-emitting diode designs
Inferring and constructing origin-affiliation information across infrastructures (AARC G057)
Conveying affiliation information from origin providers across infrastructures proxies as defined in G025 is only
possible if the origin identity provider releases such information. In case no eduPersonScopedAffiliation is
provided, it may be partially reconstructed according to these guidelines. If there is no reliable way to infer origi
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