137,503 research outputs found
Similarity Renormalization Group for Few-Body Systems
Internucleon interactions evolved via flow equations yield soft potentials
that lead to rapid variational convergence in few-body systems.Comment: 3 pages, 6 figures. To appear in the proceedings of the 20th European
Conference on Few-Body Problems in Physics (EFB20), Pisa, September 10-14,
200
Noether symmetry in teleparallel gravity
Hao Wei et.al. has claimed in that Noether symmetry in the context of teleparallel theory of
gravity admits , (where is an arbitrary) in matter
domain era in Friedmann- Robertson universe. But, it has been shown that the
conserved current obtained under the process does not satisfy the field
equations in general. Here, it is shown that Noether Symmetry admits
along with a conserved current in teleparallel gravity. Thus, their claim is not
correct.Comment: Appear in Physics Letters B, 9 Page
Remarks on the fractional Moser-Trudinger inequality
In this article, we study the connection between the fractional
Moser-Trudinger inequality and the fractional
-Poincar\'e type inequality for any Euclidean
domain and discuss the sharpness of this inequality whose analogous results are
well known in the local case. We further provide sufficient conditions on
domains for fractional -Poincar\'e type inequalities to hold. We also
derive Adachi-Tanaka type inequalities in the non-local setting.Comment: 20 pages, to appea
Does the World Bank have any impact on human development in the poorest countries? Some preliminary evidence from Africa
In an attempt to better understand the impact of the World Bank on human development in poor countries, we use cross-country data on African countries, for the 1990-2002 period, to examine this relationship. The coefficient estimates of our parsimonious fixed-effects models indicate that while loans and grants of the Bank have had a positive impact on some relatively short-term indicators of health and education in an average African country, there is little evidence to suggest that such loans and grants have helped these countries to consolidate on the short-term gains
Effect of the strength of attraction between nanoparticles on Wormlike micelle-nanoparticle system
The nanoparticle-Equilibrium polymer (or Wormlike micellar) system shows
morphological changes from percolating network-like structures to
non-percolating clusters with a change in the minimum approaching distance
(EVP-excluded volume parameter) between nanoparticles and the matrix of
equilibrium polymers. The shape anisotropy of nanoparticle clusters can be
controlled by changing the polymer density. In this paper, the synergistic
self-assembly of nanoparticles inside equilibrium polymeric matrix (or Wormlike
micellar matrix) is investigated with respect to the change in the strength of
attractive interaction between nanoparticles. A shift in the point of
morphological transformation of the system to lower values of EVP as a result
of a decrease in the strength of the attractive nanoparticle interaction is
reported. We show that the absence of the attractive interaction between
nanoparticles leads to the low packing of nanoparticle structures, but does not
change the morphological behaviour of the system. We also report the formation
of the system spanning sheet-like arrangement of nanoparticles which are
arranged in alternate layers of matrix polymers and nanoparticles
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