Results 21 to 30 of about 1,024,413 (238)

Lunar Laser Ranging Retroreflectors: Velocity Aberration and Diffraction Pattern

open access: yesThe Planetary Science Journal, 2023
The Lunar Laser Ranging (LLR) retroreflector arrays have been on the Moon for half a century. During that time, the laser range uncertainty has improved by a factor of 100. Consequently, the science results have also improved by orders of magnitude.
James G. Williams   +9 more
doaj   +1 more source

Minimum capture-recapture rates and years of banding station operations to obtain reliable adult annual survival estimates

open access: yesJournal of Field Ornithology, 2022
We examined variability in adult annual survival rate estimates for 33 breeding bird species, using 2011–2019 data from a 38-station Monitoring Avian Productivity and Survivorship (MAPS) program in Alberta, Canada.
Danielle R. Kaschube   +5 more
doaj  

Care and support for youth living with HIV/AIDS in secondary schools: perspectives of school stakeholders in western Uganda

open access: yesBMC Public Health, 2021
Background Although schools have been identified as significant settings in the response to the HIV/AIDS pandemic, limited research is available on how they can accommodate Youth Living with HIV/AIDS (YLWHA), especially in resource limited countries.
Emmanuel Kimera   +7 more
doaj   +1 more source

Simulating the Phases of the Moon Shortly After Its Formation

open access: yes, 2014
The leading theory for the origin of the Moon is the giant impact hypothesis, in which the Moon was formed out of the debris left over from the collision of a Mars-sized body with the Earth.
Cuk, Matija   +2 more
core   +1 more source

Developmental implications of prenatal opioid exposure among school-aged children: a mixed methods and community-initiated analysis

open access: yesBMC Public Health, 2023
Background Growing research points to potential long-term developmental implications of prenatal opioid exposure for children. Yet, polysubstance use and adverse childhood experiences are raised as potential confounders.
Andra Wilkinson   +2 more
doaj   +1 more source

LUNA: An algorithm for generating dynamic planet-moon transits

open access: yes, 2012
It has been previously shown that moons of extrasolar planets may be detectable with the Kepler Mission, for moon masses above ~0.2 Earth masses Kipping et al. 2009c.
Carter   +34 more
core   +1 more source

Prospects for radio detection of extremely high energy cosmic rays and neutrinos in the Moon [PDF]

open access: yes, 2001
We explore the feasibility of using the Moon as a detector of extremely high energy (>10^19 eV) cosmic rays and neutrinos. The idea is to use the existing radiotelescopes on Earth to look for short pulses of Cherenkov radiation in the GHz range emitted ...
Alvarez-Muñiz, J., Zas, E.
core   +2 more sources

Building Open Educational Resources from the Ground Up: South Africa's Free High School Science Texts

open access: yesJournal of Interactive Media in Education, 2008
The relatively new field of open educational resources (OER) is just now receiving more widespread attention and study. As such, there have been few opportunities thus far to share knowledge across program, organizational and national boundaries.
Lisa Petrides, Cynthia Jimes
doaj   +1 more source

Home - About - Disclaimer - Privacy