Results 1 to 10 of about 158,972 (310)

Eruption age of the Sverrefjellet volcano, Spitsbergen Island, Norway [PDF]

Polar Research, 2012
Sverrefjellet is a Pleistocene-age basaltic volcanic construct on north-western Spitsbergen Island (Svalbard Archipelago, Norway). Published ages for the Sverrefjellet eruption range between 6000 years and ca. 1 million years before present.
Allan H. Treiman
doaj   +1 more source

Basement structure of the northern Ontong Java Plateau [PDF]

, 1993
Site surveys conducted in conjunction with Leg 130 on the Ontong Java Plateau reveal a strong seismic reflector at 0.8 to 1.0 s below the seafloor that drilling at Sites 803 and 807 confirmed is Cretaceous basalt.
Hagen, Rick A., Kroenke, Loren w., Mayer, Larry A., Mosher, David, Shipley, Tom H., Winterer, Edward L.   +5 more
core   +2 more sources

Study of some Physical properties of basalt – clay mixes [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2012
Jordanian basalt was added to China clay on different mixes up to 60% by weight. Some of physical properties were studied. Mixes basalt showed a remarkable increase in density with increasing basalt addition.
Adil N . Ayyash
doaj   +1 more source

Experimental and numerical study on the axial compression behavior of circular concrete columns confined by BFRP spirals and ties

Reviews on Advanced Materials Science
This study investigates the compression behavior of circular concrete columns confined with basalt fiber-reinforced polymer (BFRP) stirrups, comparing their performance with traditional steel-reinforced columns.
Sufian Muhammad, Rahman Muhammad, Wang Xin, Fahmy Mohamed F.M., Wu Zhishen, Moussa Amr M.A.   +5 more
doaj   +1 more source

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

Case 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

Wavelet-based vibration denoising for structural health monitoring

Urban Lifeline
In the context of civil engineering applications, vibration responses are complex, exhibiting variations in time and space and often containing nonlinearity and uncertainties not considered during data collection. These responses can also be contaminated
Ahmed Silik, Mohammad Noori, Zhishen Wu, Wael A. Altabey, Ji Dang, Nabeel S. D. Farhan   +5 more
doaj   +1 more source

Material-specific coefficients C1 and C2 in Williams-Landel-Ferry equations and phase transition behaviors of asphalt binder reinforced by various basalt fibers

Case Studies in Construction Materials
The Williams–Landel–Ferry (WLF) equation is critical for predicting the rheological behavior of viscoelastic materials. However, no research has reported the main parameters, C1 and C2, in WLF equations for fiber-reinforced asphalts (FRAs).
Xiao Cheng, Bin Zhong, Zhishen Wu
doaj   +1 more source

Fragment properties at the catastrophic disruption threshold: The effect of the parent body's internal structure

, 2009
Numerical simulations of asteroid break-ups, including both the fragmentation of the parent body and the gravitational interactions between the fragments, have allowed us to reproduce successfully the main properties of asteroid families formed in ...
Asphaug, Benz, Benz, Benz, Bottke, Carroll, Davis, Derek C. Richardson, Durda, Grady, Herrmann, Holsapple, Housen, Housen, Housen, Jutzi, Jutzi, Leinhardt, Martin Jutzi, McGlaun, Michel, Michel, Michel, Michel, Michel, Nakamura, Patrick Michel, Richardson, Richardson, Richardson, Stewart, Wilkison, Willy Benz, Yeomans   +33 more
core   +3 more sources

Timescales of carbon turnover in soils with mixed crystalline mineralogies

, 2017
Organic matter–mineral associations stabilize much of the carbon (C) stored globally in soils. Metastable short-range-order (SRO) minerals such as allophane and ferrihydrite provide one mechanism for long-term stabilization of organic matter in young ...
Bern, C., Chadwick, O., Khomo, L., Trumbore, S.   +3 more
core   +2 more sources

Near-seafloor magnetic mapping of off-axis lava flows near the Kairei and Yokoniwa hydrothermal vent fields in the Central Indian Ridge [PDF]

, 2018
The Kairei (KHF) and Yokoniwa hydrothermal fields (YHF) are hosted in mafic as well as ultramafic rocks distributed at an off-axis volcanic knoll of the Central Indian Ridge.
Kyoko Okino, Masakazu Fujii
core   +2 more sources