Results 71 to 80 of about 101,501 (201)

Tensile Strength of Geological Discontinuities Including Incipient Bedding, Rock Joints and Mineral Veins

open access: yesRock Mechanics and Rock Engineering, 2016
Geological discontinuities have a controlling influence for many rock-engineering projects in terms of strength, deformability and permeability, but their characterisation is often very difficult.
J. Shang, S. Hencher, L. J. West
semanticscholar   +1 more source

An Efficient Second-Order Accurate and Continuous Interpolation for Block-Adaptive Grids

open access: yes, 2014
In this paper we present a second-order and continuous interpolation algorithm for cell-centered adaptive-mesh-refinement (AMR) grids. Continuity requirement poses a non-trivial problem at resolution changes. We develop a classification of the resolution
Borovikov, Dmitry   +2 more
core   +1 more source

Research on Acoustic Properties of Artificial Inhomogeneities in Calibration Samples for Ultrasonic Testing of Polyethylene Pipe Welds

open access: yesMetrology
This article investigates the acoustic properties of artificial discontinuities in reference specimens for the ultrasonic testing of welded joints in polyethylene pipes.
Aleksandr Shikhov   +4 more
doaj   +1 more source

Cluster, Classify, Regress: A General Method For Learning Discountinous Functions

open access: yes, 2019
This paper presents a method for solving the supervised learning problem in which the output is highly nonlinear and discontinuous. It is proposed to solve this problem in three stages: (i) cluster the pairs of input-output data points, resulting in a ...
Bernholdt, David E.   +5 more
core  

Development of an Automatic Rock Mass Classification System Using Digital Tunnel Face Mapping

open access: yesApplied Sciences
To mitigate unforeseen incidents, such as key block failure or tunnel collapse during excavation, an appropriate support pattern that correlates with the geological conditions of the rock mass at the tunnel face should be designed.
Hyun-Koo Lee   +3 more
doaj   +1 more source

Groundwater identification using geophysical tools and its implications for the stability of slopes in an open pit mine

open access: yesGeofísica Internacional
The open pit mining development begins with the opening of pits with the rock mass excavation and formation of slopes and berms for ore exploration. Knowledge about the geological conditions represents an important step in this process, since rock masses
Beatriz Guzzo Duz   +4 more
doaj   +1 more source

Loucura e razão: produzindo classes interativas

open access: yesArquivos Brasileiros de Psicologia, 2014
The article proposes a discussion of some present configurations of madness, reviewing, in the first moment, the ideas of Ian Hacking, in order to think this existence mode as an operative effect of a matrix that constitutes social interactive ...
Andrea Cristina Scisleski   +1 more
doaj  

Loucura e razão: produzindo classes interativas

open access: yesArquivos Brasileiros de Psicologia, 2008
The article proposes a discussion of some present configurations of madness, reviewing, in the first moment, the ideas of Ian Hacking, in order to think this existence mode as an operative effect of a matrix that constitutes social interactive ...
Andrea Cristina Scisleski   +1 more
doaj  

Coronal Alfven waves and the solar wind [PDF]

open access: yes
The observed properties of coronal Alfven waves in the solar wind at 1 AU are briefly reviewed, with some theoretical discussion of their probable effects on the dynamics of the expanding solar corona. It is concluded that coronal Alfven waves can have a
Belcher, J. W.
core   +1 more source

Rigidity of reinforced concrete structures in the presence of different cracks

open access: yesMATEC Web of Conferences, 2017
It is proposed a method for rigidity calculating of reinforced concrete structures in the presence of cracks, suitable for rod and flat-strained concrete composite structures.
Iakovenko Igor   +2 more
doaj   +1 more source

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