Results 101 to 110 of about 9,980 (290)

A Low‐Power Radioisotope XRF Spectrometer for Detection of Light Elements on Planetary Missions

X-Ray Spectrometry, EarlyView.
ABSTRACT Current X‐ray spectrometers for in situ geochemical analysis on planetary missions typically rely either on X‐ray tubes, which demand electrical power and add mass and thermal complexity, or on alpha particle X‐ray spectrometers (APXS) that use rare 244Cm$$ {}^{244}\mathrm{Cm} $$ sources, and come with severe concerns on radiation safety and ...
Leandro Silveri, Artem Knyazev, Hashem Alaidaros, Maryam Manzoor Amanullah, Zach Ioannou, Tengiz Ibrayev, Danish Khan, Sara Leardini, Laura Manenti, Simi Maria Emilia Mangani, Safa Naseem, Sandhya Sharma, Sara Trevisan, Alia Zino, Francesco Arneodo   +14 more
wiley   +1 more source

Have Astronauts Visited Neptune? Student Ideas About How Scientists Study The Solar System [PDF]

, 2017
The nature of students’ ideas about the scientific practices used by astronomers when studying objects in our Solar System is of widespread interest to discipline-based astronomy education researchers.
KeriAnn Rubin, Scott McDonald, Yann Shiou Ong, Timothy Gleason, Plummer, Julia D., Christopher Palma, Ong, Yann Shiou, Chrysta Ghent, Tanya Furman, Ong, Yann S., Gleason, Timothy, McDonald, Scott, Rubin, KeriAnn, Palma, Christopher, Flarend, Alice, Furman, Tanya, Ghent, Chrysta, Plummer, Julia, Julia Plummer, Alice Flarend   +19 more
core   +2 more sources

Biogeochemical, sedimentological and dinoflagellate‐based reconstruction of the Holocene palaeoenvironment of the east Limfjord, Denmark

Boreas, EarlyView.
To assess how the eastern part of the Limfjord system has changed over the Holocene, relative to the wider Limfjord and western Baltic region, a sedimentary succession spanning c. 9600–150 cal. a BP was collected from Nibe Bredning, near Sebbersund, from a shallow coastal inlet along the eastern connection between the Limfjord and the Kattegat (north ...
Gabriella M. Weiss, Jonathan P. Lewis, Paula J. Reimer, David B. Ryves, Peter Rasmussen, Jesper Olsen   +5 more
wiley   +1 more source

Moonlight Duration and Intensity Favour Nocturnal Activity in a Diurnal Desert Bird

Ethology, EarlyView.
Accelerometer data show that Canarian houbara bustards increase nocturnal activity two‐ to fivefold when the moon is visible, with activity rising as moonlit duration and illumination increase. Both display and non‐display behaviours peaked around full moon, reaching up to half of peak daytime levels, with males increasing visual displays during ...
Juan C. Alonso, Alberto Ucero, Inmaculada Abril‐Colón, Carlos Palacín   +3 more
wiley   +1 more source

Astronomy 161-The Solar System [PDF]

The Solar System online course is maintained by the Department of Physics & Astronomy at the University of Tennessee. The twenty two chapters cover everything from time and scale in the universe, development of modern astronomy, the planets ...

core  

Solar Wind—Ionosphere Interface at Mars. Ion Dynamics, Asymmetry, Plasma Jets

Geophysical Research Letters
We report on observations made by the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft, in the shocked solar wind‐ionosphere interface of Mars. We observe a strong asymmetry in plasma flow governed by the direction of the motional electric field.
E. Dubinin, M. Fraenz, M. Pätzold, S. Tellmann, J. McFadden, J. Halekas, G. DiBraccio   +6 more
doaj   +1 more source

Site Fidelity, Depth Preference and Vertical Movement Patterns of Lentic and Lotic European Catfish Silurus glanis

Fisheries Management and Ecology, EarlyView.
ABSTRACT To study variables that may trigger the dispersion of the currently expanding European catfish in its native distribution limits, 42 individuals were captured from Upper Lake Constance (lentic) and 42 from two streaming tributaries (lotic), fitted with pressure and temperature loggers, and released at the site of capture (control: lotic or ...
Albert Ros, Jan Baer, Matthias Fromherz, Juergen Geist, Alexander Brinker   +4 more
wiley   +1 more source

Anthropogenic and natural factors are associated with bird dawn chorus onset in subtropical East Asia

Ibis, EarlyView.
Anthropogenic factors such as artificial lighting at night (ALAN) and natural factors including temperature and moonlight can affect the dawn chorus pattern in birds. However, most studies are conducted in temperate regions. We investigated the effect of anthropogenic and natural factors on dawn chorus timing in eight species of bird across Hong Kong ...
Ann W. Y. To, Sarah A. Collins
wiley   +1 more source

New Polarimetric Data for the Galilean Satellites: Io and Ganymede Observations and Modeling

The Planetary Science Journal
New high-precision disk-integrated measurements of the polarization of Io and Ganymede in the UBVRI bands are presented. The observations were obtained using polarimeters mounted on the Crimean Astrophysical Observatory and the Peak Terskol Observatory ...
Nikolai Kiselev, Vera Rosenbush, Ari Leppälä, Karri Muinonen, Ludmilla Kolokolova, Aleksandr Savushkin, Nikolai Karpov   +6 more
doaj   +1 more source

Systemic effects of sunlight: 10‐year review of cardiovascular, infection and cancer outcomes

Journal of the European Academy of Dermatology and Venereology, EarlyView.
This review highlights the systemic effects of sunlight and ultraviolet radiation. While UV radiation exposure has known cutaneous risks including photoaging and skin cancer, evidence suggests potential associations with reduced all‐cause mortality, improved infectious disease outcomes and reduced blood pressure.
Jasira A. Ziglar, Rebecca L. Quiñonez, Lydiah Fridah M. Mpyisi, Indermeet Kohli, Yolanda Gilaberte, Henry W. Lim   +5 more
wiley   +1 more source