141,280 research outputs found
Semi-allogeneic vaccine for T-cell lymphoma
© 2007 Yu et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens
Polyhedra with few 3-cuts are hamiltonian
In 1956, Tutte showed that every planar 4-connected graph is hamiltonian. In
this article, we will generalize this result and prove that polyhedra with at
most three 3-cuts are hamiltonian. In 2002 Jackson and Yu have shown this
result for the subclass of triangulations. We also prove that polyhedra with at
most four 3-cuts have a hamiltonian path. It is well known that for each non-hamiltonian polyhedra with 3-cuts exist. We give computational
results on lower bounds on the order of a possible non-hamiltonian polyhedron
for the remaining open cases of polyhedra with four or five 3-cuts.Comment: 21 pages; changed titl
The dynamical behavior of theory
Recently, a new model obtained from generalizing teleparallel gravity, named
theory, is proposed to explain the present cosmic accelerating expansion
with no need of dark energy. In this paper, we analyze the dynamical property
of this theory. For a concrete power law model, we obtain that the dynamical
system has a stable de Sitter phase along with an unstable radiation dominated
phase and an unstable matter dominated one. We show that the Universe can
evolve from a radiation dominated era to a matter dominated one, and finally
enter an exponential expansion phase.Comment: 10 pages, 1 figure; accepted by PL
On the problem of phase transitions in lysozyme crystals
We present experimental evidence of the fact that lysozyme crystals, which
are grown from their mother solution and exist in it, dissolve on heating above
T=307 K. We argue that the anomaly in the light scattering recently observed at
the temperature T=307 K and identified in the reference [Svanidze A. V. et al.
2006. JETP Lett. 84: 551] as a structural crystalline phase transition in the
single lysozyme crystals, in fact, corresponds to a temperature limit of the
crystal existence.Comment: 6 pages, 1 figur
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