Results 51 to 60 of about 2,525,619 (266)

Algorithms for Coloring Quadtrees

open access: yes, 1999
We describe simple linear time algorithms for coloring the squares of balanced and unbalanced quadtrees so that no two adjacent squares are given the same color.
Bern, Marshall W.   +2 more
core   +2 more sources

Myrmecofauna of urban gardens in southeast region of Brazil

open access: yesBioscience Journal, 2015
In an urban environment, ants can find shelter for the construction of their nests and resources available for survival. Myrmecofauna surveys have been conducted in forest fragments and residential areas, but there are few studies on the occurrence of ...
Manuella Rezende Vital   +3 more
doaj   +1 more source

The Square [PDF]

open access: yesNexus Network Journal, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

IASI‐Derived Sea Surface Temperature Data Set for Climate Studies

open access: yesEarth and Space Science, 2021
Sea surface temperature (SST) is an essential climate variable, that is directly used in climate monitoring. Although satellite measurements can offer continuous global coverage, obtaining a long‐term homogeneous satellite‐derived SST data set suitable ...
Ana C. Parracho   +7 more
doaj   +1 more source

Multimagic Squares

open access: yesThe American Mathematical Monthly, 2007
In this paper we give the first method for constructing n-multimagic squares (and hypercubes) for any n. We give an explicit formula in the case of squares and an effective existence proof in the higher dimensional case. Finally we prove that n-multimagic squares do not exist for certain orders.
Derksen, H.G.J.   +2 more
openaire   +4 more sources

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

open access: yesFEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

The Approximate Invariance of the Average Number of Connections for the Continuum Percolation of Squares at Criticality

open access: yes, 2002
We perform Monte Carlo simulations to determine the average excluded area $$ of randomly oriented squares, randomly oriented widthless sticks and aligned squares in two dimensions. We find significant differences between our results for randomly oriented
Alon   +15 more
core   +1 more source

Large sub-regional differences of ammonia seasonal patterns over India reveal inventory discrepancies

open access: yesEnvironmental Research Letters, 2022
Ammonia (NH _3 ) is a key precursor of haze particles and fine particulate matter (PM _2.5 ) and its spatiotemporal variabilities are poorly constrained.
Christopher A Beale   +12 more
doaj   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

open access: yesFEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

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