267 research outputs found
Web-Based Training Methods for Behavioral Health Providers: A Systematic Review
There has been an increase in the use of web-based training methods to train behavioral health providers in evidence-based practices. This systematic review focuses solely on the efficacy of web-based training methods for training behavioral health providers. A literature search yielded 45 articles meeting inclusion criteria. Results indicated that the serial instruction training method was the most commonly studied web-based training method. While the current review has several notable limitations, findings indicate that participating in a web-based training may result in greater post-training knowledge and skill, in comparison to baseline scores. Implications and recommendations for future research on web-based training methods are discussed
Effect of Parametric Resonances on the Bunched-beam Dilution Mechanism
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
How much charm can PANDA produce?
We consider the production of charmed baryons and mesons in the
proton-antiproton binary reactions at the energies of the future ANDA
experiment. To describe these processes in terms of hadronic interaction
models, one needs strong couplings of the initial nucleons with the
intermediate and final charmed hadrons. Similar couplings enter the models of
binary reactions with strange hadrons. For both charmed and strange hadrons we
employ the strong couplings and their ratios calculated from QCD light-cone sum
rules. In this method finite masses of and quarks are taken into
account. Employing the Kaidalov's quark-gluon string model with Regge poles and
adjusting the normalization of the amplitudes in this model to the calculated
strong couplings, we estimate the production cross section of charmed hadrons.
For it can reach several tens of at
, whereas the cross sections of and pair
production are predicted to be smaller.Comment: 22 pages, 6 figures, matches published versio
Search for the scalar and mesons in the reactions
It is shown that the reactions give a good
chance for observing scalar and mesons. In the photon energy region
less then 100 MeV the vector meson contributions are negligible in comparison with the scalar
mesons for
greater than
. Using two-channel treatment of the
scattering the predictions for
are derived. The four quark model, the model of molecule and
the model of scalar and mesons are discussed.Comment: 31 pages, 10 ps files of figures, minor numerical changes, Appendix
corrected, to be published in Phys.Rev.
CE22: Nonlinear Beam Dynamics Experiments at the IUCF Cooler Ring
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Limit Cycle Instability of Proton Beams Generated by Nonlinear Electron-Cooling Force
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Measurement of the lifetime of hadrons containing the b-quark
Data collected with the High Resolution Spectrometer at PEP, corresponding to an integrated luminosity of 200 pb-1 of e+e- annihilation at 29 GeV, were used to measure the mean lifetime of hadrons containing the bottom quark. The lifetime was determined using the impact parameter method on events containing a high-transverse-momentum electron. The result, based on a sample of 301 events, is [tau]B = 1.02 +/-0.390.42 ps, where the indicated errors include both statistics and systematics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/26581/1/0000120.pd
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Particle dynamics inside a quasi-isochronous storage ring
Quasi-isochronous {alpha}-like bucket can be important in providing ultra short bunches. the instability of a bunch inside the bucket is found to be severely affected by rf phase modulation. The synchrotron tune drops to zero at the bucket edge very rapidly, indicating the possibility of a thick chaotic layer due to overlapping of resonance islands. The approach to chaos comes from a sequence of bifurcation into 2:1 parametric resonances. When quantum excitation is included in addition to radiation damping, the instability is worsened. the steady-state particle distribution in the longitudinal phase space is Gaussian in the phase coordinate and non-Gaussian in the momentum coordinate, unless the bunch is small. The size of the bunch is governed only bye the ``thermal energy`` {ital E{sub th}} = D{sup 2}/2A, where D and A are, respectively, the normalized diffusion and damping coefficients. The quantum lifetime of the particle bunch, for the D and A that have been enhanced by the smallness of the phase- slip factor, is studied and turns out to be much longer than expected. Phase modulation tends to enhance quantum diffusion at high frequencies, but leads to stochastic resonances instead at low frequencies
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