167 research outputs found
Polaronic Heat Capacity in The Anderson - Hasegawa Model
An exact treatment of the Anderson - Hasegawa two - site model, incorporating
the presence of superexchange and polarons, is used to compute the heat
capacity. The calculated results point to the dominance of the lattice
contribution, especially in the ferromagnetic regime. This behavior is in
qualitative agreement with experimental findings.Comment: 9 pages, Revtex, 4 postscript figure
Medium-chain triglyceride supplementation may increase working memory in older adults: A pilot study
Poster presentatio
Osteosclerosis in the extinct Cayaoa Bruneti (Aves, anseriformes) : insights on behavior and fligftlessness
Fil: Mendoza, Ricardo de. División Paleontología Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La PlataFil: Tambussi, Claudia Patricia. Centro de Investigaciones en Ciencias de la Tierra (CICTERRA). Universidad Nacional de Córdoba; Argentin
Locating positions of {\gamma}-ray--emitting regions in blazars
We propose a new method to locate the gamma-ray--emitting positions R_g from
the measured time lags T_ob of gamma-ray emission relative to broad emission
lines. The method is also applicable to lower frequencies. R_g depends on
parameters T_ob, R_BLR, v_d and theta, where R_BLR is the size of broad-line
region, v_d is the travelling speed of disturbances down the jet and theta is
the viewing angle of the jet axis to the line of sight. As T_ob=0, T_ob<0 or
T_ob>0, the broad lines zero-lag, lag or lead the gamma-rays, respectively. It
is applied to 3C 273, in which the lines and the radio emission have enough
data, but the gamma-rays have not. We find T_ob0 for the 5, 8, 15,
22 and 37 GHz emission relative to the broad lines Ha, Hb and Hg. The lag may
be positive or negative, however current data do not allow to discriminate
between the two cases. The measured lags are on the order of years. For a given
line, T_ob generally decreases as radio frequency increases. This trend most
likely results from the radiative cooling of relativistic electrons. The
negative lags have an average of T_ob=-2.86 years for the 37 GHz emission,
which represents that the lines lag the radio emission. The positive lags have
T_ob=3.20 years, which represents that the lines lead the radio emission. We
obtain the radio emitting positions R_radio=0.40--2.62 pc and
R_radio=9.43--62.31 pc for the negative and positive lags, respectively. From
the constraint of R_g </~ R_radio (e.g. Dermer & Schlickeiser 1994; Jorstad et
al. 2001), we have R_g </~ 0.40--2.62 pc for the negative lags. For the
positive lags, 4.67--30.81<R_g </~ 9.43--62.31 pc. These estimated R_g are
consistent with those of other researches. These agreements confirm the
reliability of the method and assumptions. The method may be also applicable to
BL Lacertae objects, in which broad lines were detected.Comment: 13 pages, 8 figures, MNRAS, acceptanc
Core excitation in Coulomb breakup reactions
Within the pure Coulomb breakup mechanism, we investigate the one-neutron
removal reaction of the type A(a,b)X with Be and C
projectiles on a heavy target nucleus Pb at the beam energy of 60
MeV/nucleon. Our intention is to examine the prospective of using these
reactions to study the structure of neutron rich nuclei. Integrated partial
cross sections and momentum distributions for the ground as well as excited
bound states of core nuclei are calculated within the finite range distorted
wave Born approximation as well as within the adiabatic model of the Coulomb
breakup. Our results are compared with those obtained in the studies of the
reactions on a light target where the breakup proceeds via the pure nuclear
mechanism. We find that the transitions to excited states of the core are quite
weak in the Coulomb dominated process as compared to the pure nuclear breakup.Comment: Revtex format, five postscript figures included, to appear in Phys.
Rev.
Dark sectors 2016 Workshop: community report
This report, based on the Dark Sectors workshop at SLAC in April 2016,
summarizes the scientific importance of searches for dark sector dark matter
and forces at masses beneath the weak-scale, the status of this broad
international field, the important milestones motivating future exploration,
and promising experimental opportunities to reach these milestones over the
next 5-10 years
Need-driven dementia-compromised behavior: An alternative view of disruptive behavior
The disruptive behavior of persons with dementia is a problem of considerable clinical interest and growing scientific concern. This paper offers a view of these behaviors as expressions of unmet needs or goals and provides a comprehensive conceptual framework to guide further research and clinical practice. Empiricalfindings and clinical impressions related to wandering, vocalizations and aggression to support and illustrate the framework are presentedPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66887/2/10.1177_153331759601100603.pd
The reduced model multiscale method (R3M) for the non-linear homogenization of hyperelastic media at finite strains
Higher Dimensional Cosmological Implications Of A Decay Law For Term : Expressions For Some Observable Quantities
Implications of cosmological model with a cosmological term of the form
, where is a constant, are
analyzed in multidimensional space time. The proper distance, the luminosity
distance-redshift, the angular diameter distance-redshift, and look back
time-redshift for the model are presented. It has been shown that such models
are found to be compatible with the recent observations. This work has thus
generalized to higher dimensions the well-know result in four dimensional space
time. It is found that there may be significant difference in principle at
least,from the analogous situation in four dimensional space time.Comment: 11 pages, no figur
- …