Results 81 to 90 of about 9,703,974 (249)

Raising and Lowering Operators for Askey-Wilson Polynomials

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2007
In this paper we describe two pairs of raising/lowering operators for Askey-Wilson polynomials, which result from constructions involving very different techniques. The first technique is quite elementary, and depends only on the ''classical'' properties
Siddhartha Sahi
doaj  

Modelling stem cell differentiation related processes—A practical overview for biologists

open access: yesFEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar   +4 more
wiley   +1 more source

Mary Pauline Root correspondence

open access: yes, 1911
Correspondence from Mary Pauline Root regarding her work and life during the years she toured the U.S. visiting American Indian communities and Indian Government Schools and teaching social hygiene for the U.S. Bureau of Indian Affairs. Also included are
Abbott, Lawrence F. (Lawrence Fraser), 1859-1933   +2 more
core  

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS 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
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS 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
wiley   +1 more source

Square root kalman filter with contaminated observations [PDF]

open access: yes, 1992
The algorithm of square root Kalman filtering for the case of contaminated observations is described in the paper. This algorithm is suitable for the parallel computer implementation allowing to treat dynamic linear systems with large number of state ...
Rubio, A., Romera, Rosario, Cipra, Tomas
core   +1 more source

Représentation du couvert forestier dans la modélisation hydrologique : comparaison de dix modèles (synthèse bibliographique)

open access: yesBiotechnologie, Agronomie, Société et Environnement, 2014
Forest cover representation in hydrological modeling: a comparison of ten models. A review. There are many hydrological models, some of which can be used for forested environments.
Deraedt, D.   +3 more
doaj  

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

open access: yesFEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang   +4 more
wiley   +1 more source

Morphological and Symbiotic Root Modifications for Mineral Acquisition from Nutrient-Poor Soils

open access: yes, 2018
Plants have the ability to form vast root systems with lengths measuring up to several kilometers and branch roots numbering in millions. These expansive root systems provide plants with a large surface area for water and nutrient uptake from the ...
Gastón Muñoz   +15 more
core   +1 more source

Range unit root tests [PDF]

open access: yes, 2003
Since the seminal paper by Dickey and Fuller in 1979, unit-root tests have conditioned the standard approaches to analyse time series with strong serial dependence, the focus being placed in the detection of eventual unit roots in an autorregresive model
García, Ana   +2 more
core   +1 more source

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