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4 results for “invariant properties”
Repeatable randomness, invariant properties, and the design of biological signatures of identity
<p>What makes a perfect signature? Optimal signatures should be consistent within individuals and distinctive between individuals. In defence against avian brood parasitism, some host species have evolved 'signatures' of identity on their eggs, comprising inter-individual variation in colour and pattern. Tawny-flanked prinia (<em>Prinia subflava</em>) egg signatures facilitate recognition and rejection of parasitic cuckoo finch (<em>Anomalospiza imberbis</em>) eggs. Here, we show that consistency and distinctiveness of pattern are negatively correlated in prinia eggs, perhaps because non-random, repeatable pattern generation mechanisms increase consistency but limit distinctiveness. We hypothesise that pattern properties which are repeatable within individuals but random between individuals ('invariant properties') allow hosts to circumvent this trade-off. To find invariant properties, we develop a method to quantify entire egg phenotypes from images taken from different perspectives. We find that marking scale (a fine-grained measure of size), but not marking orientation or position, is an invariant property in prinias. Hosts should therefore use differences in marking scale in egg recognition, but instead field experiments show that these differences do not predict rejection of conspecific eggs by prinias. Overall, we show that invariant properties allow consistency and distinctiveness to coexist, yet receiver behaviour is not optimally tuned to make use of this information.</p>
Repeatable randomness, invariant properties, and the design of biological signatures of identity
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Data for "How to use scale invariant properties of imperviousness in urban areas to handle missing data ?"
<p>The data set corresponds the data presented in the data paper : “How to use scale invariant properties of imperviousness in urban areas to handle missing data ?“ which has been submitted to Water Resources Research ” (https://agupubs.onlinelibrary.wiley.com/journal/19447973).</p> <p>It corresponds to :</p> <p>- the rainfall data collected on 2019-06-02 with 5 min and 30 s time steps by a disdrometer installed on the roof of Ecole des Ponts ParisTech building.</p> <p>- land use distribution for the Jouy-en-Josas catchment (1 = forest, 2= road, 3=Grass, 4=building, 5=Gully, 6=missing data), with pixel size of 10 m and 2 m.</p> <p>More details can be found in the file and in the paper.</p>
Mucosal-Associated Invariant T Cell Effector Function Is an Intrinsic Cell Property That Can Be Augmented by the Metabolic Cofactor α-Ketoglutarate
GEO Series GSE164740. Homo sapiens. 14 samples. Type: Expression profiling by high throughput sequencing.
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