Results 221 to 230 of about 635,864 (319)

Numerical Modelling of Frictional Sliding Induced Damage and Heating Effects on Rock With an Application to Sievers’ J‐Miniature Drilling on Granite

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The present study develops a finite element‐based numerical method for simulation of frictional rotational sliding induced damage and heating effects on rock. The method is applied to the Sievers’ J‐ miniature drill test, which is widely used for estimating the rock drillability and predicting the cutter life.
Timo Saksala   +8 more
wiley   +1 more source

Exploring the Elastic Properties of Interfacial Transition Zone in Concrete Materials Using an Ensemble Learning Approach

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Concrete materials consist of multiple phases with distinct mechanical properties, making it essential to accurately identify the mechanical behavior of both constituent phases and their interfaces for effective multiscale modeling. This study estimates the elastic properties of the interfacial transition zone using a machine learning (ML ...
Jing Xue   +3 more
wiley   +1 more source

Internal and External Sources of Nonprofit Innovativeness: A Configurational Approach

open access: yesNonprofit Management and Leadership, EarlyView.
ABSTRACT Using a configurational approach, this research explores how the complex interrelationships among four organizational factors—board size, board involvement, centralization, and government funding—influence organizational innovation. Based on survey and archival data from 44 U.S.
Jiawei Sophia Fu   +2 more
wiley   +1 more source

Adaptive sampling for ecological monitoring using biased data: a stratum‐based approach

open access: yesOikos, EarlyView.
Indicators of biodiversity change across large extents of geographic, temporal and taxonomic space are frequent products of various types of ecological monitoring and other data collection efforts. Unfortunately, many such indicators are based on data that are highly unlikely to be representative of the intended statistical populations.
Oliver L. Pescott   +2 more
wiley   +1 more source

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