Results 51 to 60 of about 1,639,294 (145)

The political economy of migration processes: An agenda for migration research and analysis [PDF]

open access: yes, 2009
This working paper proposes the development of an approach to researching and analysing migration processes that combines a livelihoods aproach to exploring local-level migration dynamics with a relational political economy perspective that deepens ...
Collinson, Sarah
core   +1 more source

Thermally Regulated Viscoelastic Tidal Migration of Eccentric Planets

open access: yesThe Astrophysical Journal Letters
A growing population of short-period Neptune-like planets has nonzero eccentricities and, in some cases, large stellar obliquities, suggestive of high-eccentricity migration. Modeling this evolution requires a prescription for tidal dissipation, which in
Cristobal Petrovich   +1 more
doaj   +1 more source

A Microphysics Model of Multicomponent Venus' Clouds With a High‐Accuracy Condensation Scheme

open access: yesEarth and Space Science, Volume 12, Issue 6, June 2025.
Abstract Accurate modeling of the Venusian cloud structure remains challenging due to its complex microphysical properties. Condensation primarily determines the cloud particle size distribution within the various cloud layers. However, existing Venus microphysics models mainly use a full‐stationary bin scheme, which may be prone to numerical diffusion
H. Karyu   +8 more
wiley   +1 more source

Migration transitions: a theoretical and empirical inquiry into the developmental drivers of international migration [PDF]

open access: yes, 2010
This paper aims to advance a conceptual framework on the developmental drivers of international migration processes and to provide an empirical test drawing on the global migrant origin database.
de Haas, Hein
core   +1 more source

Exploring Warm Jupiter Migration Pathways with Eccentricities. II. Correlations with Host Star Properties and Orbital Separation

open access: yesThe Astronomical Journal
Warm Jupiters with orbital periods of ≈10–365 days represent a population of giant planets located well within the water ice line but beyond the region of tidal influence of their host star relevant for high-eccentricity tidal migration.
Marvin Morgan   +2 more
doaj   +1 more source

Long‐Lasting Volcanism of the Moon Aided by the Switch in Dominant Mechanisms of Magma Ascent: Role of Localized Radioactive Enrichment in a Numerical Model of Magmatism and Mantle Convection

open access: yesGeophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract Significant volcanic activity continued for billions of years since 3.5–4 Gyr ago in the Procellarum KREEP Terrane (PKT) of the Moon, but not so significant outside the PKT. To understand this volcanic history, we developed a 2‐D numerical model of magmatism and mantle convection; the effects of the PKT on lunar evolution are considered by ...
Ken'yo U   +4 more
wiley   +1 more source

Signs of Similar Stellar Obliquity Distributions for Hot and Warm Jupiters Orbiting Cool Stars

open access: yesThe Astronomical Journal
Transiting giant planets provide a natural opportunity to examine stellar obliquities, which offer clues about the origin and dynamical histories of close-in planets.
Marvin Morgan   +5 more
doaj   +1 more source

The Orbit of Warm Jupiter WASP-106 b is Aligned with its Star

open access: yesThe Astronomical Journal, 2023
Understanding orbital obliquities, or the misalignment angles between a star’s rotation axis and the orbital axis of its planets, is crucial for unraveling the mechanisms of planetary formation and migration.
Jan-Vincent Harre   +5 more
doaj   +1 more source

Tracing the Contribution of Abiotic Methane in Deep Natural Gases From the Songliao Basin, China Using Bulk Isotopes and Methane Clumped Isotopologue 12CH2D2

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract The identification and evaluation of abiotic methane remain an active research area due to uncertainties in traditional indicators that may lead to “false‐positive” detections. As an emerging isotopic tool, methane clumped isotope can provide novel information about the generation and post‐generation processes of methane gases.
Jiacheng Li   +5 more
wiley   +1 more source

Labour Migration for Vulnerable Communities: A Strategy to Adapt to a Changing Environment [PDF]

open access: yes, 2011
de Moor N. Labour Migration for Vulnerable Communities: A Strategy to Adapt to a Changing Environment. COMCAD Arbeitspapiere - Working Papers, 101.
Moor, Nicole de, de Moor, Nicole
core  

Home - About - Disclaimer - Privacy