Results 31 to 40 of about 1,025,390 (347)

Fe alloy slurry and a compacting cumulate pile across Earth's inner-core boundary

, 2019
Seismic observations show a reduced compressional-wave gradient at the base of the outer core relative to the preliminary reference Earth model and seismic wave asymmetry between the east-west hemispheres at the top of the inner core.
Dygert, Nick, Lin, Jung-Fu, Nelson, Peter, Zhang, Youjun   +3 more
core   +1 more source

Solar wind turbulent heating by interstellar pickup protons: 2-component model [PDF]

, 2010
We apply a recently developed 2-component phenomenology to the turbulent heating of the core solar wind protons as seen at the Voyager 2 spacecraft. We find that this new description improves the model predictions of core temperature and correlation ...
Isenberg, Philip A., Matthaeus, William H., Oughton, Sean, Smith, Charles W.   +3 more
core   +2 more sources

Scattered energy from a rough core‐mantle boundary modeled by a Monte Carlo seismic particle method: Application to PKKP precursors

Geophysical Research Letters, 2016
We stack a large global data set of 1 Hz PKKP waveforms to constrain globally averaged properties of PKKP precursors. We find that the precursor observations are better explained by scattering from core‐mantle boundary (CMB) topography than by scattering
Nicholas Mancinelli, Peter Shearer
doaj   +1 more source

Nitrogen Content in the Earth's Outer Core [PDF]

Geophysical Research Letters, 2019
AbstractUsing first principles molecular dynamic simulations, we explore the effects of nitrogen (N) on the density and sound velocity of liquid iron and evaluate its potential as a light element in the Earth's outer core. Our results suggest that Fe‐N melt cannot simultaneously explain the density and seismic velocity of the Earth's outer core ...
Suraj K. Bajgain, Mainak Mookherjee, Rajdeep Dasgupta, Dipta B. Ghosh, Bijaya B. Karki   +4 more
openaire   +1 more source

Moon-Induced Differential Rotation in Earth’s Interior: A Comprehensive Conceptual Model

Geosciences
This study presents a novel conceptual model to explain the differential rotation within Earth’s layers, a phenomenon observed through seismic wave studies but not fully understood.
Chil-Yeong Kim, Eun-Kyoung Seo, You-Soon Chang, Chungwan Lim   +3 more
doaj   +1 more source

Chemical Convection and Stratification in the Earth's Outer Core

Frontiers in Earth Science, 2019
Convection in the Earth's outer core is driven by buoyancy sources of both thermal and compositional origin. The thermal and compositional molecular diffusivities differ by several orders of magnitude, which can affect the dynamics in various ways.
Mathieu Bouffard, Gaël Choblet, Stéphane Labrosse, Johannes Wicht   +3 more
doaj   +1 more source

Temperature-Insensitive Two-Dimensional Vector Bending Sensor Based on Fabry-Pérot Interferometer Incorporating a Seven-Core Fiber

IEEE Photonics Journal, 2022
We proposed and experimentally demonstrated a temperature-insensitive two-dimensional (2D) vector bending sensor on the basis of Fabry-Pérot Interferometer (FPI).
Beibei Qi, Baijin Su, Fan Zhang, Ou Xu, Yuwen Qin   +4 more
doaj   +1 more source

Development of hot drawing process for nitinol tube [PDF]

, 2009
In recent years, Nitinol, near-equiatomic nickel-titanium alloys, have found growing applications in medical technology and joining technology, due to their special characteristics such as shape memory, superplasticity and biocompatibility.
Favier D., Frick C. P., H. WANG, LEI ZHANG, Robertson S. W., WEI CHEN, XIUSHAN TANG, Zhao L. C.   +7 more
core   +2 more sources

Co-axial dual-core resonant leaky fibre for optical amplifiers [PDF]

, 2008
We present a co-axial dual-core resonant leaky optical fibre design, in which the outer core is made highly leaky. A suitable choice of parameters can enable us to resonantly couple power from the inner core to the outer core. In a large-core fibre, such
Ajeet Kumar, Arbore M A, Bachmann P K, Bernard Dussardier, Bise R T Fini J M Yan M F, Charu Kakkar, Kumar A, Li K, Vipul Rastogi, Yeung A Chiang K S Rastogi V Chu P L Peng G D   +9 more
core   +4 more sources

A Global Paleosecular Variation Database for the Paleogene: Stationary Secular Variation Behavior Since the Triassic?

Geochemistry, Geophysics, Geosystems
Paleosecular variation analysis is a primary tool for characterizing ancient geomagnetic behavior and its evolution through time. This study presents a new high‐quality directional data set, paleosecular variation of the Paleogene (PSVP), with and ...
Y. A. Engbers, D. Thallner, R. K. Bono, C. J. Sprain, M. J. Murray, K. Bristol, B. Handford, T. Torsvik, A. J. Biggin   +8 more
doaj   +1 more source