Results 91 to 100 of about 13,582,146 (349)
Optimizing Spatial Databases [PDF]
This paper describes the best way to improve the optimization of spatial databases: through spatial indexes. The most commune and utilized spatial indexes are R-tree and Quadtree and they are presented, analyzed and compared in this paper. Also there are
Åžtefan OLARU, Anda VELICANU
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Temporal and Spatial Analysis of Negative Emotions in China during the COVID-19 Pandemic
Behavioral SciencesThis research aims to explore the spatiotemporal distribution patterns of negative emotions in mainland China during different stages of the COVID-19 pandemic and the external factors influencing this clustering.
Yating Ding, Lin Wu, Zijian Peng, Bo Liu
doaj +1 more source
Journal of Graph Theory, 2018 AbstractBae and Park found an upper bound on the arc index of prime links in terms of the minimal crossing number. In this paper, we extend the definition of the arc presentation to spatial graphs and find an upper bound on the arc index of any spatial graph as where is the minimal crossing number of , is the number of edges, and is the number of
Min Jung Lee, Sungjong No, Seungsang Oh
openaire +4 more sources
FEBS Letters, EarlyView.Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell +2 more
wiley +1 more source
Construction of a Spatial Housing Price Index by Estimating an Almost Ideal Demand System [PDF]
The aim of this article is to build a spatial housing price index for the Chilean communes (the commune political body similar to a municipality or county).
Paredes - Araya, Dusan, Iturra, Victor
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Spatial Interactions and resilience in arid ecosystems [PDF]
, 2004 We present a mathematical analysis of the consequences of spatial interactions between vegetation patches by means of water flow for the functioning of arid systems.
Van de Koppel, J. +5 more
core +3 more sources
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
A Spatial Cost of Living Index for Colombia using a Microeconomic Approach and Censored Data [PDF]
This paper describes a methodology to calculate a spatial cost of living index using Colombian data for 2006 that takes into consideration the microeconomic behavior of households.
Atuesta, Laura, Paredes, Araya
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FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source