Results 51 to 60 of about 56,293 (261)
Random walks and random permutations [PDF]
Journal of Physics A: Mathematical and General, 2001 A connection is made between the random turns model of vicious walkers and random permutations indexed by their increasing subsequences. Consequently the scaled distribution of the maximum displacements in a particular asymmeteric version of the model can be determined to be the same as the scaled distribution of the eigenvalues at the soft edge of the
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Design and analysis strategies for robust microbiome ageing research
FEBS Letters, EarlyView.The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik +5 more
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Local extrema in random permutations and the structure of longest alternating subsequences [PDF]
Discrete Mathematics & Theoretical Computer Science, 2011 Let $\textbf{as}_n$ denote the length of a longest alternating subsequence in a uniformly random permutation of order $n$. Stanley studied the distribution of $\textbf{as}_n$ using algebraic methods, and showed in particular that $\mathbb{E}(\textbf{as ...
Dan Romik
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On Increasing Subsequences of Random Permutations
Journal of Combinatorial Theory, Series A, 1996 Let \(L_n\) be the length of a longest increasing subsequence in a random permutation of \(1,2,\dots,n\). Further let \(E[L_n]\) and \(V[L_n]\) be the expected value and the variance of \(L_n\), respectively. It is well known that \((2-o(1))\sqrt n\leq E[L_n]\leq 2\sqrt n\). By some recent results of M. Talagrand, B. Bollobás and J.
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Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
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Variable Bit Permutations: Linear Characteristics and Pure VBP-Based Cipher [PDF]
Computer Science Journal of Moldova, 2005 This paper describes linear characteristics of the variable bit permutations (VBP) that are used in the form of the data-dependent permutations. This primitive suites well to the design of fast cheap-hardware-oriented ciphers. Because of the existence of
N.A. Moldovyan +2 more
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Analysis of feature intervisibility and cumulative visibility using GIS, Bayesian and spatial statistics: a study from the Mandara Mountains, northern Cameroon. [PDF]
PLoS ONE, 2014 The locations of diy-geδ-bay (DGB) sites in the Mandara Mountains, northern Cameroon are hypothesized to occur as a function of their ability to see and be seen from points on the surrounding landscape.
David K Wright +2 more
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From Random Numbers to Random Objects
Entropy, 2022 Many security-related scenarios including cryptography depend on the random generation of passwords, permutations, Latin squares, CAPTCHAs and other types of non-numerical entities.
Behrouz Zolfaghari +2 more
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Efficient sampling of random permutations
Journal of Discrete Algorithms, 2008 We show how to uniformly distribute data at random (not to be confounded with permutation routing) in two settings that are able to deal with massive data: coarse grained parallelism and external memory. In contrast to previously known work for parallel setups, our method is able to fulfill the three criteria of uniformity, work-optimality and balance ...
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The role of miR‐335‐5p in the redifferentiation of BRAF p.V600E thyroid cancers
Molecular Oncology, EarlyView.The BRAF p.V600E mutation promotes thyroid cancer dedifferentiation and radioiodine resistance. Using a network approach, we identified miR‐335‐5p as a key regulator of BRAF‐mutated thyroid tumors. Restoring miR‐335‐5p increased thyroid‐specific gene expression and iodine uptake in cells and organoids.
Valeria Pecce +11 more
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