Results 131 to 140 of about 32,671 (309)
The numerical modelling of rockbolts in geomechanics by finite element methods
, 1998 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University, 15/03/1999.In tunnel excavation, the use of rockbolts has long been a popular means of reinforcement in rock masses to prevent the rock opening from caving
Chao, Tung-Yo, Chao, T.
core
, 2020 The effect of discontinuity stiffness and spacing and intact block stiffness on the transmission of stress waves through a rock mass has been assessed with the use of a large database of 1531 analysis results, generated using a 1D numerical model.
Holmes, H +2 more
core
Numerical study of the mechanical behaviour of rock joints and non-persistent jointed rock masses
, 2014 The mechanical behaviour of a rock mass is significantly controlled by the presence of discontinuities, and understanding the effect of discontinuities is essential in the economical and reliable design of rock structures. This research investigated the effect of roughness and persistency of rock joints on the mechanical behaviour of rock structures ...
openaire +2 more sources
Cteno‐Bot: An Untethered Metachronally Swimming Robot With Magnetoactive Propulsors
Advanced Intelligent Systems, EarlyView.We present Cteno‐bot, an untethered ctenophore‐inspired robot which swims using metachronally coordinated appendages. A single mechanism controls up to 216 magnetoactive propulsors via a dynamically varying magnetic field. We show that the swimming speed of the robot can be increased without a corresponding increase in power requirement, simply by ...
David J. Peterman, Margaret L. Byron
wiley +1 more source
British Educational Research Journal, EarlyView., 2023 Abstract Children's relationship with time in preschools is an under‐researched area. Young children rarely know how to measure time using a clock, but their experiences of time may contribute to understanding children's well‐being and debates about quality in preschools.
Kristín Dýrfjörð +3 more
wiley +1 more source
AI &Innovation, EarlyView.ABSTRACT Open‐source artificial intelligence is widely promoted as a democratising pathway to digital sovereignty for African states, offering access to frontier architectures without prohibitive capital investment. This paper investigates whether open‐source AI represents a credible route to autonomy or generates a new form of structural dependency ...
Ololade A. Shonubi
wiley +1 more source
Applied SciencesThe rock is the direct object of disc cutter rock-breaking engineering. It contains natural joint surface. To investigate the influence of joint-surface roughness on the rock-breaking process. The hob model is created using AutoCAD software.
Guoye Jing +3 more
doaj +1 more source
Reinforcing Effect of Rock Bolt in Rock Joint
Soils and Foundations, 1988 Yoshinaka, Ryunoshin +2 more
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Accounting for animal health in efficiency analysis: An application to Swedish dairy farms
American Journal of Agricultural Economics, EarlyView.Abstract Poor animal health is a central concern in modern livestock production. Despite the necessity to incorporate animal health in efficiency analysis, the theoretical and empirical developments are limited on this subject. This article appropriately characterizes the axiomatic properties of animal health within a production framework.
Frederic Ang +3 more
wiley +1 more source
Evaluation of Rock Joint Coefficients
, 2017 A computer method for evaluation of rock joint coefficients is described and several applications are presented. The method is based on two absolute numerical indicators that are formed by means of the Fourier replicas of rock joint profiles.
Audy, Ondřej +3 more
core +1 more source