Results 171 to 180 of about 34,528,690 (304)

Review and prospects of shear test of bolted rock joints

open access: yesDeep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren   +4 more
wiley   +1 more source

On the boundary Carrollian conformal algebra. [PDF]

open access: yesLett Math Phys
Buzaglo L   +5 more
europepmc   +1 more source

Classification of simple Harish-Chandra modules over Q-Virasoro algebra

open access: yes, 2007
We give a complete classification of simple Harish-Chandra modules over Q - Virasoro algebra. 1 Introduction A classification of the simple Harish-Chandra modules over complex Virasoro algebra V was given by O.Mathieu in remarkable paper [7]. According
Q Virasoro Algebra, Volodymyr Mazorchuk
core  

A BV-algebra structure on Hochschild cohomology of the integral group ring of finitely generated Abelian groups

open access: yes
We study a Batalin-Vilkovisky algebra structure on the Hochschild cohomology of the group ring of finitely generated abelian groups. The Batalin-Vilkovisky algebra structure for finite abelian groups comes from the fact that the group ring of finite ...
Angel A., Duarte D.
core   +1 more source

How to reduce sampling error in species population monitoring: from theory to methods

open access: yesEcography, EarlyView.
Progress towards national and international targets to halt and reverse declines in species' abundances will be assessed using multispecies indicators (MSIs). A distinction must be drawn between two MSIs. One is the ideal, but unobserved, MSI that would have been measured had all species and sites within the scope of the target been sampled.
Robin J. Boyd   +5 more
wiley   +1 more source

Latitudinal effect on the structure of snake–prey interaction networks is mediated by snake species richness

open access: yesEcography, EarlyView.
Despite the growing number of studies on trophic networks in recent decades, there are still important gaps in our understanding of how these networks are structured across broad environmental gradients. These gaps are even greater in some groups of terrestrial vertebrates, such as snakes, requiring a cohesive synthesis of their broader trophic ...
Daniela Pinto‐Coelho   +4 more
wiley   +1 more source

A conceptual approach to the early learning of Algebra using a computer [PDF]

open access: yes
This thesis describes an investigation into the conceptual understanding of algebra by early learners (age 11-13 years) and how a computer-based approach may be used to improve such, without any consequent loss of manipulative skills.
Thomas, Michael O. J.
core  

Machine Learning Unveils Isolated‐Surrounded Pt Motifs in High‐Entropy Alloys for Superior Low‐Temperature Ammonia Oxidation

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A physics‐informed machine learning approach successfully decodes the complex catalytic activity of high‐entropy alloys for ammonia oxidation. By revealing a synergistic mechanism involving lattice and electronic couplings, the study identifies a superior “isolated‐surrounded” platinum motif.
Shangfeng Jiang   +5 more
wiley   +1 more source

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