Results 71 to 80 of about 70,920 (305)

Failure Criteria of Gas-Infiltrated Sandy Shale Based on the Effective Stress Principle

open access: yesEnergies, 2016
Pore gas has a significant influence on rock strength. This study performed triaxial compression tests of gas-infiltrated sandy shale samples to investigate the strength characteristics under gas pressures of 0 and 2 MPa. The effective stress coefficient
Wenpu Li, Dongming Zhang, Minghui Li
doaj   +1 more source

Theory Guided Fine‐Tune of Strain Effects in Pt Ternary Alloy via Rare Earth Templating: Achieving High Performance PEMFCs Catalysts

open access: yesAdvanced Materials, EarlyView.
Theory‐guided strain engineering and rare‐earth templating are combined to create Pt5(Ce)Co@Pt multilayer nanoparticles with a Pt5Co‐like sublayer that fine‐tunes *OH binding near the ORR volcano optimum. The resulting catalyst delivers exceptional mass activity and remarkable long‐term PEMFC durability, revealing a strategy for designing highly active
Qi Zhang   +15 more
wiley   +1 more source

REVIEW ON THE MECHANICAL PROPERTIES OF FROZEN ROCKS

open access: yesRudarsko-geološko-naftni Zbornik, 2022
The freezing technique has been employed for a long time to strengthen the mechanical properties of intact rock and rock mass; however, it has not received as much attention as it deserves.
Seyed Morteza Davarpanah   +2 more
doaj  

Aspects of energy requirements for rock drilling [PDF]

open access: yes, 1974
Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core  

Estimating strength of rock masses using fuzzy inference system

open access: yes, 2016
International Symposium on International Society for Rock Mechanics, ISRM 2016 -- 29 August 2016 through 31 August 2016 -- -- 179639This paper describes how to apply fuzzy inference system (FIS) to estimate the strength of field scale rock masses by ...
Sarı, Mehmet, M Sari
core   +1 more source

Double‐Transition‐Metal MXenes: Multimetallic 2D Platforms for Next‐Generation Biomedicine

open access: yesAdvanced Materials, EarlyView.
The present work explores recent progress in double‐transition‐metal MXenes and focuses on their potential as multifunctional biomedical nanoplatforms whose tunable optical, electronic, mechanical, and surface properties enable imaging, theranostics, antimicrobial activity, biosensing, tissue engineering, and drug delivery.
Parsa Namakiaraghi   +2 more
wiley   +1 more source

Advances in Magnesium‐Based Thermoelectrics: A Critical Review

open access: yesAdvanced Materials, EarlyView.
Magnesium‐based thermoelectric materials have emerged as promising candidates for low‐to‐mid‐temperature energy conversion due to their abundance, low cost, and competitive performance. This review summarizes recent advances in Mg3X2, MgAgSb, and Mg2X systems, covering transport mechanisms, fabrication strategies, stability challenges, and device ...
Li‐Min Zhang   +5 more
wiley   +1 more source

The Influence of Rock Properties and Size into Strength Criteria: A Proposed Criterion for Soft Rock Masses

open access: yesCivil Engineering Dimension, 2011
A new modified strength criterion for soft rock masses is proposed in this paper in order to provide a suitable estimation for soft rock mass strength.
Agustawijaya D.S.
doaj  

Determining Key Parameters in Rock Properties for the Design of Hydroelectric Projects: A Case Study in Morona Santiago, Ecuador

open access: yesGeotechnics
Subsurface characterisation is a fundamental aspect of the planning and design of hydroelectric projects, as it enables the assessment of the technical and geotechnical feasibility of the proposed infrastructure, ensuring its stability and functionality.
Walter David Becerra Moreira   +3 more
doaj   +1 more source

Ultra‐High‐Throughput Discovery of Multifunctional Polyphenolic Coatings on Droplet Microarrays

open access: yesAdvanced Materials, EarlyView.
An ultra‐high‐throughput (UHT) combinatorial strategy enables the miniaturized synthesis and screening of ≈30 000 polyamine‐polyphenolic (PaPp) coatings using droplet microarrays (DMA). This approach reveals hundreds of previously unknown fluorescent, redox‐active, and antibacterial materials, including multifunctional, cell‐compatible surfaces ...
Vania Tanda Widyaya   +11 more
wiley   +1 more source

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