75,774 research outputs found
The Unified Segment Tree and its Application to the Rectangle Intersection Problem
In this paper we introduce a variation on the multidimensional segment tree,
formed by unifying different interpretations of the dimensionalities of the
data structure. We give some new definitions to previously well-defined
concepts that arise naturally in this variation, and we show some properties
concerning the relationships between the nodes, and the regions those nodes
represent. We think these properties will enable the data to be utilized in new
situations, beyond those previously studied. As an example, we show that the
data structure can be used to solve the Rectangle Intersection Problem in a
more straightforward and natural way than had be done in the past.Comment: 14 pages, 6 figure
Extended Uncertainty Principle for Rindler and cosmological horizons
We find exact formulas for the Extended Uncertainty Principle (EUP) for the
Rindler and Friedmann horizons and show that they can be expanded to obtain
asymptotic forms known from the previous literature. We calculate the
corrections to Hawking temperature and Bekenstein entropy of a black hole in
the universe due to Rindler and Friedmann horizons. The effect of the EUP is
similar to the canonical corrections of thermal fluctuations and so it rises
the entropy signalling further loss of information.Comment: 7 pages, 6 figures, REVTEX 4.1, minor changes, refs update
Parthenogenetic populations can remain stable in spite of high mutation rate and random drift
Magnets position X-ray film for weld inspection
Film-positioning device uses magnets to hold X ray film for weld inspection in nonferrous structures, such as tanks, where access to interior points is difficult
Fermions in the pseudoparticle approach
The pseudoparticle approach is a numerical technique to compute path
integrals without discretizing spacetime. The basic idea is to integrate over
those field configurations, which can be represented by a sum of a fixed number
of localized building blocks (pseudoparticles). In a couple of previous papers
we have successfully applied the pseudoparticle approach to pure SU(2)
Yang-Mills theory. In this work we discuss how to incorporate fermionic fields
in the pseudoparticle approach. To test our method, we compute the phase
diagram of the 1+1-dimensional Gross-Neveu model in the large-N limit.Comment: 11 pages, 10 figure
Aggregation of Red Blood Cells: From Rouleaux to Clot Formation
Red blood cells are known to form aggregates in the form of rouleaux. This
aggregation process is believed to be reversible, but there is still no full
understanding on the binding mechanism. There are at least two competing
models, based either on bridging or on depletion. We review recent experimental
results on the single cell level and theoretical analyses of the depletion
model and of the influence of the cell shape on the binding strength. Another
important aggregation mechanism is caused by activation of platelets. This
leads to clot formation which is life saving in the case of wound healing but
also a major cause of death in the case of a thrombus induced stroke. We review
historical and recent results on the participation of red blood cells in clot
formation
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