Results 61 to 70 of about 17,989,902 (389)

Dynamic X-ray imaging of the magnetosheath expected during a super storm

open access: yesFrontiers in Astronomy and Space Sciences
The Earth’s magnetosheath is a vital source region of soft X-ray emissions generated by the solar wind charge exchange (SWCX) mechanism in geospace.
Yuqi Gong   +7 more
doaj   +1 more source

Population and species neighbor identity impact trait–trait relationships and plant performance

open access: yesPopulation Ecology, EarlyView.
We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx   +2 more
wiley   +1 more source

Sanitary Protection and Space Activities

open access: yesAdvanced Space Law, 2020
The events of 2019-2020 have drawn attention to the threats that can be caused by uncontrolled outbreaks of poorly researched viral or infectious diseases. Sanitary (sanitary and epidemiologic) legislation is of certain importance in countering the epidemic.
Oleksandr Zyma, Olha Soloviova
openaire   +2 more sources

Active Experiments in Space: The Future [PDF]

open access: yesFrontiers in Astronomy and Space Sciences, 2019
Planned active space experiments and ideas for future active space experiments are reviewed. Three active experiments being readied are DSX (Demonstration and Space eXperiments), SMART (Space Measurement of Rocket-released Turbulence), and BeamPIE (Beam Plasma Interaction Experiment).
Joseph E. Borovsky, Gian Luca Delzanno
openaire   +2 more sources

Combining transient dynamics and logistic‐asymptotic growth to study the recovery of two seabird populations after rat eradication

open access: yesPopulation Ecology, EarlyView.
This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier   +6 more
wiley   +1 more source

Forecasting of the Geomagnetic Activity for the Next 3 Days Utilizing Neural Networks Based on Parameters Related to Large‐Scale Structures of the Solar Corona

open access: yesSpace Weather
With the increasing number of large constellations, it is crucial to accurately predict satellite positions and movements using upper atmosphere models driven by geomagnetic indices. Machine learning (ML) can quickly provide geomagnetic index predictions.
Tingyu Wang   +6 more
doaj   +1 more source

Global integration of the Schrödinger equation within the wave operator formalism: The role of the effective Hamiltonian in multidimensional active spaces [PDF]

open access: yesJ. Phys. A: Math. Theor. 49 195305 (2016), 2016
A global solution of the Schr\"odinger equation, obtained recently within the wave operator formalism for explicitly time-dependent Hamiltonians [J. Phys. A: Math. Theor. 48, 225205 (2015)], is generalized to take into account the case of multidimensional active spaces.
arxiv   +1 more source

Explicit IMF $B_y$-effect maximizes at subauroral latitudes (Dedicated to the memory of Eigil Friis-Christensen)

open access: yes, 2019
The most important parameter in the coupling between solar wind and geomagnetic activity is the $B_z$-component of the interplanetary magnetic field (IMF).
Gopalswamy, Nat   +2 more
core   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Development of the Chinese Dual Auroral Radar Network and Preliminary Results

open access: yesSpace Weather
Led by the National Space Science Center of the Chinese Academy of Sciences, we have built a Chinese dual auroral radar network in northern China, which is called the CN‐DARN.
Jiaojiao Zhang   +9 more
doaj   +1 more source

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