Results 41 to 50 of about 90,052 (244)

An observationally-driven kinetic approach to coronal heating

open access: yes, 2016
Coronal heating through the explosive release of magnetic energy remains an open problem in solar physics. Recent hydrodynamical models attempt an investigation by placing swarms of 'nanoflares' at random sites and times in modeled one-dimensional ...
Chintzoglou, G.   +5 more
core   +1 more source

Injectable Bone Cements: A Generational Framework for Bioactivity, Porosity, and Mechanobiological Design at the Nanoscale

open access: yesAdvanced NanoBiomed Research, EarlyView.
Key demographic, biological, and material considerations that drive the need for advanced injectable bone cement technologies. Injectable bone cements (IBCs) are widely used in orthopaedic and craniofacial applications due to their minimally invasive delivery and ability to provide early mechanical stabilisation.
Frank Fei   +2 more
wiley   +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

Enterprise Restructuring and Firm Performance: A Comparison of Rural and Urban Enterprises in Jiangsu Province [PDF]

open access: yes, 2004
We examine the contrast in the experience of ownership reforms between urban SOEs and rural TVEs using a panel of industrial enterprises in Nanjing municipality for the period from 1994 to 2001. Our objectives are twofold.
Dong, Xiao-Yuan   +2 more
core   +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

Early-age stabilization of kaolin soil using fly ash and nanographene: a hybrid experimental and machine learning investigation

open access: yesOpen Geosciences
Soil stabilization remains a critical challenge in geotechnical engineering, particularly in achieving sustainable and high-performance improvements for problematic clays.
Elif Firat Müge, Özlü Veysel
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

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

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

Avaliação do estresse oxidativo e contaminação por chumbo em praticantes de tiro esportivo - DOI: 10.4025/actascihealthsci.v25i1.2300

open access: yesActa Scientiarum. Health Sciences, 2008
O chumbo, metal utilizado na fabricação de munições, pode depletar a glutationa e gerar espécies reativas de oxigênio capazes de desencadear reações de peroxidação lipídica.
Marco Aurélio Echart Montano   +2 more
doaj   +1 more source

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