Results 41 to 50 of about 306,510 (300)
Rocks Really Rock: electronic field trips via Web Google Earth can generate positive impacts in attitudes toward Earth sciences in middle- and high-school students [PDF]
Geoscience CommunicationEarth sciences (ESs) are relevant to society and its relationship with the Earth system. However, ES education in K-12 environments in the United States faces several challenges, including limited exposure to ESs, lack of awareness of ES careers, and low
C. Ortiz-Guerrero, J. Loizzo
doaj +1 more source
Provenance of sedimentary rocks [PDF]
, 2009 Understanding the origins, or provenance, of a sedimentary deposit is an important aspect of geology. Sedimentary rocks are derived from the erosion of other rocks and thus provide important records of the geological environment at the time they were ...
Moloney, Paul +3 more
core +1 more source
Selenium and molybdenum enrichment in uranium roll-front deposits of Wyoming and Colorado, USA [PDF]
, 2017 Acknowledgements The authors wish to thank Cal VanHolland, Jim Bonner and John Cooper of Ur-Energy (Casper, Wyoming) for their assistance with sampling, data provision and feedback.
Bullock, Liam A., Parnell, John
core +1 more source
Advanced Materials Technologies, EarlyView.A MEMS‐integrated metamaterial filter enables continuous, low‐voltage spectral tuning in the long‐wavelength infrared (LWIR). The device employs extraordinary optical transmission in a dual suspended metasurface stack, where electrostatic actuation precisely controls the intermembrane air gap.
Oleg Bannik +6 more
wiley +1 more source
Études Britanniques Contemporaines, 2023 This issue of Études britanniques contemporaines emanates from contributions to a workshop of the Société d’Études Anglaises Contemporaines (SEAC) at the 2022 conference of the Société des Anglicistes de l’Enseignement Supérieur in Clermont-Ferrand.
Vanessa Guignery
doaj +1 more source
Minerals in Afghanistan : the potential for copper [PDF]
, 2006 There are around 300 documented copper deposits, occurrences and showings in Afghanistan as shown in Figure 1. A variety of styles of copper mineralisation occur in rocks ranging in age from Proterozoic to Neogene.
Benham, Antony John, Coats, Stan
core
Micromachined Double‐Membrane Mechanically Tunable Metamaterial for Thermal Infrared Filtering
Advanced Photonics Research, Volume 6, Issue 5, May 2025.Herein, a mechanically tunable double‐layer plasmonic metamaterial leveraging the extraordinary optical transmission effect observed in subwavelength arrays of openings within thin metal layers is presented. The concept is experimentally validated by integrating the proposed metamaterial structure into an electrostatic parallel‐plate actuator to create
Oleg Bannik +7 more
wiley +1 more source
How the Marsden Fund has failed to achieve its full potential in the ESA panel: evidence of limitations in scope, biased outcomes, and futile applications [PDF]
, 2014 We have analysed the scope of proposals funded by the ‘Earth Sciences and Astronomy’ (ESA) panel of the Marsden Fund for the period 2004 to 2013.
Bryan, Karin R., Lowe, David J.
core +1 more source
Advanced Science, EarlyView.The adsorption of AsV on akaganeite nanorods was found to provide a magnetic signature. A change in the surface spin order gave rise to a second peak in the zero‐field cooled curve. AsIII adsorption does not provide any change in the magnetic behavior of the sorbent.
Marco Sanna Angotzi +11 more
wiley +1 more source
Lead (Pb) Isotope Baselines for Studies of Ancient Human Migration and Trade in the Maya Region.
PLoS ONE, 2016 We examined the potential use of lead (Pb) isotopes to source archaeological materials from the Maya region of Mesoamerica. The main objectives were to determine if: 1) geologic terrains throughout the Maya area exhibit distinct lead isotope ratios ...
Ashley E Sharpe +6 more
doaj +1 more source