Results 31 to 40 of about 5,753,745 (253)

Rare earth elements in coastal sediments of the Northern Galician Shelf: influence of geological features [PDF]

, 2012
Prego, R., Caetano, M., Bernardez, P., Brito, P., Ospina-Alvarez, N., & Vale, C. (2012). Rare earth elements in coastal sediments of the Northern Galician Shelf: influence of geological features. Continental Shelf Research, 35, 75–85.
Caetano, M, Vale, C., Bernárdez, Patricia, Bernardez, P, Ospina-Álvarez, Natalia, Brito, Pedro, Vale, Carlos, Prego, R., Caetano, Miguel, Ospina-Alvarez, N., Brito, P, Prego, R   +11 more
core   +1 more source

Solution to active earth pressure of narrow cohesionless backfill against rigid retaining walls under translation mode

Soils and Foundations, 2019
In urban construction, retaining walls are usually constructed adjacent to existing structures, and the width of the backfill is limited. In such cases, classical earth pressure theories, such as those by Coulomb or Rankine, are unsuitable.
Fu-quan Chen, Yu-jian Lin, Dayong Li
semanticscholar   +1 more source

Orbital dynamics of "smart dust" devices with solar radiation pressure and drag

, 2011
This paper investigates how perturbations due to asymmetric solar radiation pressure, in the presence of Earth shadow, and atmospheric drag can be balanced to obtain long-lived Earth centred orbits for swarms of micro-scale 'smart dust' devices, without ...
Colombo, Camilla, McInnes, Colin
core   +1 more source

Reactive formation of magnesiowüstite at the lunar core-mantle boundary

Nature Communications
Seismological and geodetic data indicate that the lunar core-mantle boundary (CMB) exhibits a well-defined low-velocity zone (LVZ) with a combination of anomalous seismic velocities and density that remain unexplained.
Qianzhi Xu, Shuchang Gao, Wim van Westrenen, Steeve Gréaux, Yoshio Kono, Peiyan Wu, Yongjiang Xu, Sheng Shang, Hua Xiang, Sho Kakizawa, Noriyoshi Tsujino, Yuji Higo, Yanhao Lin   +12 more
doaj   +1 more source

Amphibole's Influence on Mid‐Lithosphere Discontinuity: Insights From Electrical Conductivity

Geophysical Research Letters
The potential role of metasomatism‐induced hydrated layers, such as amphibole, in causing the mid‐lithospheric discontinuities (MLDs) has been widely debated.
Kewei Shen, Duojun Wang, Rui Zhang, Guangchao Chen, Kenan Han, Peng Chen, Ruixin Zhang, Zhiqing Zhang   +7 more
doaj   +1 more source

Lateral earth pressure on rigid retaining walls with EPS deformable geofoam inclusions

Yantu gongcheng xuebao, 2019
The finite difference program, FLAC3D, is used to model the rigid retaining wall with EPS (expanded polystyrene) deformable geofoam inclusions, and the lateral earth pressure on the wall is obtained from numerical results. The at-rest state, active state
XIE Ming-xing , ZHENG Jun-jie , SHAO An-di , JING Dan
doaj   +1 more source

Monitoring and Analysis of Pore and Earth Pressure at the Pile Surface Using Piezoresistive Silicon Pressure Transducers

Frontiers in Materials, 2021
The piezoresistive silicon pressure transducers based on the piezoresistive effect have demonstrated their potential in the accurate monitoring of pressure.
Yonghong Wang, Yongfeng Huang, Mingyi Zhang, Jiaxiao Ma   +3 more
doaj   +1 more source

Copper isotope evidence for large-scale sulphide fractionation during Earth’s differentiation [PDF]

, 2015
The differentiation of Earth into a metallic core and silicate mantle left its signature on the chemical and isotopic composition of the bulk silicate Earth (BSE).
Savage, P.S., Siebert, J., Badro, J., Moynier, F., Puchtel, I.S., Chen, H., Savage, Paul S., Shofner, G.   +7 more
core   +1 more source

A diamond-bearing core-mantle boundary on Mercury

Nature Communications
Abundant carbon was identified on Mercury by MESSENGER, which is interpreted as the remnant of a primordial graphite flotation crust, suggesting that the magma ocean and core were saturated in carbon.
Yongjiang Xu, Yanhao Lin, Peiyan Wu, Olivier Namur, Yishen Zhang, Bernard Charlier   +5 more
doaj   +1 more source

Earth pressure and stability of deep arch tunnel with straight wall in cohesive strata

Yantu gongcheng xuebao, 2017
The limit analysis method is adopted to study deep arch tunnel with straight wall in cohesive strata based on the shear failure theory. Firstly, a theoretical model for ruptured zone in the deep arch tunnel is established based on loading tests. And then
CHENG Xiao-hu
doaj   +1 more source