Results 61 to 70 of about 219,642 (266)

Elementary arithmetic

open access: yesAnnals of Pure and Applied Logic, 2005
The paper under review is a contribution to the search for syntactically simple theories, without explicitely imposed bounds on quantifiers, whose provably recursive functions form ``more feasible'' complexity classes. A quite different, alternative treatment of Leivant's results is developed.
Geoffrey E. Ostrin, Stanley S. Wainer
openaire   +3 more sources

Liver organoids: modelling complexity in homeostasis and disease

open access: yesFEBS Letters, EarlyView.
Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley   +1 more source

The Gâteaux derivative and orthogonality in C∞

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012
The general problem in this paper is minimizing the C∞− norm of suitable affine mappings from B(H) to C∞, using convex and differential analysis (Gateaux derivative) as well as input from operator theory.
Mecheri Salah, Mecheri Hacene
doaj   +1 more source

Emerging experimental and computational methods for studying redox‐regulated structural transitions

open access: yesFEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass   +2 more
wiley   +1 more source

Elementary epimorphisms

open access: yesJournal of Symbolic Logic, 2005
AbstractThe concept ofelementary epimorphismis introduced. Inverse systems of such maps are considered, and a dual of the elementary chain lemma is found (Cor. 4.2). The same is done forpure epimorphisms(Cor. 4.3 and 4.4). Finally, this is applied to certain inverse limits of flat modules (Thm. 6.4) and certain inverse limits of absolutely pure modules
openaire   +4 more sources

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS 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

Beginning Elementary Mathematics Teachers Negotiating Leadership Responsibilities

open access: yesJournal of Interdisciplinary Teacher Leadership, 2016
Induction has been given much attention in recent years. Research indicates that a comprehensive program with multiple supports for new teachers including reasonable teaching loads and complete curriculum resources are most effective.
Catherine S. Schwartz, Anne S. Ticknor
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Movement-Versus Sporting-Based Physical Education in Elementary Schools: Does Either Ensure Quality?

open access: yesMimbar Sekolah Dasar, 2019
Within the physical education literature, there remains to be contentions between the effectiveness of sporting- and movement-based approaches. Whilst both have noted strengths and weaknesses, there is little research into whether either is leading to ...
Joseph John Scott
doaj   +1 more source

Quasi-elementary Landscapes and Superpositions of Elementary Landscapes [PDF]

open access: yes, 2012
There exist local search landscapes where the evaluation function is an eigenfunction of the graph Laplacian that corresponds to the neighborhood structure of the search space. Problems that display this structure are called “Elementary Landscapes” and they have a number of special mathematical properties.
L. Darrell Whitley, Francisco Chicano
openaire   +3 more sources

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