Results 51 to 60 of about 777,364 (238)

Land birds on atolls: diversity, origin, and function

open access: yesBiological Reviews, EarlyView.
ABSTRACT Oceanic islands are global hotspots of avian biodiversity and endemism. Their isolation and distinct environmental conditions have uniquely shaped the evolutionary trajectories of island birds, while, in turn, land bird communities have become critical providers of ecological functions to island ecosystems.
Sebastian Steibl   +6 more
wiley   +1 more source

Effect of macro polypropylene fiber and basalt fiber on impact resistance of basalt fiber‐reinforced polymer‐reinforced concrete [PDF]

open access: yesStructural Concrete, 2020
AbstractIn this paper, the effect of macro nonmetallic fibers (i.e., polypropylene fibers and basalt fibers) on the impact response of basalt fiber‐reinforced polymer‐reinforced concrete (FRP‐RC) discs is experimentally investigated using a self‐developed drop‐weight impact test device.
Qingxuan Wang   +3 more
openaire   +2 more sources

Vibrational Mode-Specific Dynamics of the OH + XO→ H + XO2 (X = C/S) Reactions: Similar Topologies, Different Dynamics

open access: yesMolecules
The prototypical complex-forming reactions of OH + CO and OH + SO are critical elementary processes in atmospheric chemistry and combustion systems. The vibrational mode-specific quasi-classical trajectory (QCT) investigations for these two reactions ...
Jie Qin   +4 more
doaj   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

open access: yesDeep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang   +6 more
wiley   +1 more source

Investigation on the Influence of Basalt Short Fiber on Thermo-Physical Properties of Aluminium Metal Matrix Composites. [PDF]

open access: yes, 2013
The objective of this research work was to investigate on the influence of basalt fiber on the microstructure and thermo-physical properties of Al /basalt short fiber metal matrix composites (MMCs).
Ezhil Vannan, S., Paul Vizhian, S.
core  

Experimental Study on Durability and Mechanical Properties of Basalt Fiber Reinforced Concrete under Sodium Sulfate Erosion

open access: yesChemical Engineering Transactions, 2017
In this paper, the durability and mechanical properties of basalt fiber reinforced concrete under sodium sulfate erosion were studied. The concrete with 0%, 0.05%, 0.1%, 0.2% and 0.3% basalt fiber were respectively soaked in 5.0% sodium sulfate solution ...
Zhenshan Wang, Kai Zhao, Zhe Li, Hui Ma
doaj   +1 more source

Numerical research on anti‐dislocation measures design of deep‐buried tunnels in an anisotropic rock mass area

open access: yesDeep Underground Science and Engineering, EarlyView.
This paper conducts a numerical simulation study on the construction of a deep‐buried tunnel in an anisotropic stratum area. A statistical analysis of the effects of two anti‐faulting design measures, namely, a conventional design and an articulated design, is carried out, and the results demonstrate the effectiveness of the anti‐faulting structures ...
Shiqi Liu   +3 more
wiley   +1 more source

Strength characteristics of fiber-reinforced light shotcrete [PDF]

open access: yesE3S Web of Conferences, 2020
The article presents the regularities of the flexural and compressive strength variation, as well as the energy intensity of destruction of light heat-shielding vermiculite concrete, depending on the content of polypropylene or basalt fiber.
Alekseev Konstantin, Kurilko Alexsandr
doaj   +1 more source

BASALT FIBER CONCRETE PROPERTIES AND APPLICATIONS

open access: yes, 2022
Technical characteristics of basalt fiber are shown: Concrete made using basalt fiber has its own characteristics, which differ significantly from other fibers.
Abdullaev Ibrohim Numanovich   +1 more
core  

Ultrasonic strength evaluation of underwater heterogeneous concrete using random forest model constrained by physical laws

open access: yesCase Studies in Construction Materials
Compressive strength evaluation of concrete is crucial for the safety of underwater structures. However, the concrete heterogeneity impedes accurate evaluation based on empirical formulas (EF) derived from linear regression.
Yunfei Zou, Zijian Wang, Zhishen Wu
doaj   +1 more source

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