Results 41 to 50 of about 52,750 (303)

Campos de Cima da Serra e o turismo no espaço rural

open access: yesTurismo: Visão e Ação, 2015
A região dos Campos de Cima da Serra está situada no nordeste do Estado Rio Grande do Sul, Brasil. Ao longo de décadas, o desenvolvimento do espaço rural pautou-se majoritariamente em atividades agrícolas, contudo, tais atividades, com o passar dos anos,
Eurico de Oliveira Santos   +3 more
doaj   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

open access: yesDeep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Analytical Model for Predicting the UCS from P-Wave Velocity, Density, and Porosity on Saturated Limestone

open access: yes, 2019
Rock mechanics and rock engineering projects require determining, among other parameters, the uniaxial compressive strength (UCS) of rock. For such a purpose, it is not uncommon to perform ultrasonic pulse laboratory tests.
González, Saldaña, Arzúa
semanticscholar   +1 more source

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

open access: yesDeep Underground Science and Engineering, EarlyView.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan   +4 more
wiley   +1 more source

Unconfined Compressive Strength Testing on Expansive Clay Soils Stabilized with Cement and Lime

open access: yesRekayasa Sipil
Soil stabilization offers an alternative solution to overcome the problem of expansive clay soil characteristics. Unconfined compressive strength tests were conducted on original and expansive clay soils containing cement and lime to investigate the ...
Tigo Mindiastiwi, Febri Anggara
doaj   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

open access: yesDeep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu   +4 more
wiley   +1 more source

Pedagogia UCS 60 anos: Caminhos de construção profissional e humana

open access: yes, 2021
O livro Pedagogia UCS 60 anos: caminhos de construção profissional e humana é uma possibilidade de dizer de um lugar e do modo como pessoas se constituíram e protagonizaram histórias.

core  

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

open access: yesDeep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza   +3 more
wiley   +1 more source

Microstructural and UCS behavior of clay soils stabilized with hybrid nano-enhanced additives

open access: yesReviews on Advanced Materials Science
In this study, both individual and hybrid effects of industrial wastes (silica fume, fly ash), fibers (glass and basalt) and nanoparticles (nano SiO2, nanoclay) mixed with clay at different ratios were investigated in detail at macro and micro levels at ...
Doğan Nagihan, Fırat Müge Elif
doaj   +1 more source

ACONTECIMENTOS NO TEMPO CRÔNICO ESTATIVO DE ÉMILE BENVENISTE: O SURGIMENTO DA INFÂNCIA E DO JOGO EDUCATIVO

open access: yesPrometeica, 2016
O objetivo do artigo é articular a categoria do tempo crônico de Benveniste e suacondição estativa ao surgimento da infância e do jogo educativo, situando-os comoacontecimentos essenciais para novas concepções de ser humano e de recursoeducacional.
Michel Mendes   +5 more
doaj   +1 more source

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