208 research outputs found
Vriendschap wordt belangrijker
Item does not contain fulltextHet sociale leven van oudere volwassenen is gedurende de laatste twee decennia behoorlijk veranderd als gevolg van maatschappelijke ontwikkelingen. Onderliggende processen bij deze veranderingen zijn individualisering en het loslaten van tradities. Er is meer persoonlijke vrijheid in de keuze van leefstijl en identiteit, en grotere persoonlijke verantwoordelijkheid voor het ontwikkelen en in stand houden van een persoonlijk netwerk van sociale relaties4 p
Stimulating friendship in later life: A strategy for reducing loneliness among older women
Item does not contain fulltextIn order to promote well-being and alleviate loneliness among older women, a program was developed to help them improve existing friendships or develop new friendships. In a pilot study thirty-two participants in the program were interviewed on their friendships and loneliness at two points in time, immediately following the course and a year later. Loneliness scores were compared to those of a matched control group from a large nationally representative sample. Both groups were very lonely initially and demonstrated a significant reduction in loneliness a year later. However more women in the friendship course were successful in reducing their loneliness; these women had developed new friendships of varying degrees of closeness and had increased the complexity of their friendship networks. These changes are significantly related to the decline in loneliness. Limitations of the research design and suggestions for future studies on the friendship program are presented in the discussion.22 p
Vriendschap wordt belangrijker (Herdruk van: Gerõn, Tijdschrift over ouder worden en maatschappij, 2010, 12 (3), 4-7)
Nuclear Resonance Vibrational Spectroscopy of Iron Sulfur Proteins
Nuclear inelastic scattering in conjunction with density functional theory
(DFT) calculations has been applied for the identification of vibrational modes
of the high-spin ferric and the high-spin ferrous iron-sulfur center of a
rubredoxin-type protein from the thermophylic bacterium Pyrococcus abysii
Comprehensive study of the reactions induced by 12C on 103Rh up to 33 MeV/nucleon
Abstract Fifty-three excitation functions for the production of radioactive residues in the interaction of 12C with 103Rh have been measured from the Coulomb barrier up to 400 MeV by means of the activation technique. These excitation functions have been analyzed considering complete fusion, incomplete fusion of 8Be and α-particle fragments and, above about 200 MeV, the transfer of either one proton or one neutron from 12C to 103Rh. The emission of pre-equilibrium particles during the thermalization of the excited composite nuclei formed in all these processes and, in the case of 8Be and α incomplete fusion, also the re-emission of α-particles after a mean-field interaction or a few interactions with the target nucleons have been taken into account
Single Spin Asymmetry in Polarized Proton-Proton Elastic Scattering at GeV
We report a high precision measurement of the transverse single spin
asymmetry at the center of mass energy GeV in elastic
proton-proton scattering by the STAR experiment at RHIC. The was measured
in the four-momentum transfer squared range \GeVcSq, the region of a significant interference between the
electromagnetic and hadronic scattering amplitudes. The measured values of
and its -dependence are consistent with a vanishing hadronic spin-flip
amplitude, thus providing strong constraints on the ratio of the single
spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated
by the Pomeron amplitude at this , we conclude that this measurement
addresses the question about the presence of a hadronic spin flip due to the
Pomeron exchange in polarized proton-proton elastic scattering.Comment: 12 pages, 6 figure
Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production at midrapidity in polarized proton collisions at sqrt(s) = 200 GeV
We report a measurement of the longitudinal double-spin asymmetry A_LL and
the differential cross section for inclusive Pi0 production at midrapidity in
polarized proton collisions at sqrt(s) = 200 GeV. The cross section was
measured over a transverse momentum range of 1 < p_T < 17 GeV/c and found to be
in good agreement with a next-to-leading order perturbative QCD calculation.
The longitudinal double-spin asymmetry was measured in the range of 3.7 < p_T <
11 GeV/c and excludes a maximal positive gluon polarization in the proton. The
mean transverse momentum fraction of Pi0's in their parent jets was found to be
around 0.7 for electromagnetically triggered events.Comment: 6 pages, 3 figures, submitted to Phys. Rev. D (RC
High non-photonic electron production in + collisions at = 200 GeV
We present the measurement of non-photonic electron production at high
transverse momentum ( 2.5 GeV/) in + collisions at
= 200 GeV using data recorded during 2005 and 2008 by the STAR
experiment at the Relativistic Heavy Ion Collider (RHIC). The measured
cross-sections from the two runs are consistent with each other despite a large
difference in photonic background levels due to different detector
configurations. We compare the measured non-photonic electron cross-sections
with previously published RHIC data and pQCD calculations. Using the relative
contributions of B and D mesons to non-photonic electrons, we determine the
integrated cross sections of electrons () at 3 GeV/10 GeV/ from bottom and charm meson decays to be = 4.0({\rm
stat.})({\rm syst.}) nb and =
6.2({\rm stat.})({\rm syst.}) nb, respectively.Comment: 17 pages, 17 figure
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