Results 81 to 90 of about 23,480 (273)

A comparison of thermal drones and camera trap population estimates for Sitka black‐tailed deer in Alaska

Wildlife Biology, EarlyView.
One of the most difficult challenges for wildlife managers is reliably estimating wildlife populations. Camera traps combined with spatial capture–recapture (SCR) models are a popular tool for population estimation. They have limitations, however, including long data processing times.
Shannon P. Finnegan, Amael Hinojo, Sarah Monod, William A. Wall, Peter Olsen, Maximilian L. Allen   +5 more
wiley   +1 more source

A Formative Assessment of Geologic Time for High School Earth Science Students [PDF]

, 2007
Provides pedagogical insight concerning the assessment strategy using formative assessment The resource being annotated is: http://www.dlese.org/dds/catalog_DLESE-000-000-004-784 ...
Lamont-Doherty Earth Observatory, Columbia University
core  

Experimental assessment of large mammal population estimates from airborne thermal videography

Wildlife Biology, EarlyView.
Wildlife resource management requires reliable, fast, and affordable methods of surveying wildlife populations to develop and adaptively adjust policies. Thermal video from drones can yield high rates of detection over large areas with relative speed and safety.
Julia S. McElhinny, Gregory D. Larsen, Maxwell Messinger, Chad H. Newbolt, Andrew Whitworth, Stephen S. Ditchkoff, Miles R. Silman, Jared T. Beaver   +7 more
wiley   +1 more source

Radiometric dating of Middle Pleistocene carbonates: assessing consistency and performance of the U–Th and U–Pb dating methods [PDF]

Geochronology
The U–Th and U–Pb dating methods are widely employed for radiometric dating of Pleistocene carbonates, such as speleothems and corals. The U–Th dating method has been progressively refined over recent decades, largely through advances in mass ...
T. J. Pollard, J. D. Woodhead, R. N. Drysdale, R. L. Edwards, X. Li, A. N. Wainwright, M. Pythoud, H. Cheng, H. Cheng, J. C. Hellstrom, I. Isola, E. Regattieri, G. Zanchetta, D. S. Parmenter   +13 more
doaj   +1 more source

Earthtime Lesson Plan for U/Pb Dating (grade 8-12) [PDF]

The Earthtime Lesson Plan is a complete description of a radiometric dating module taught to high school students at MIT. U/Pd dating and it's uses, teacher background, materials needed, time frame and National Science Standards are all provided as well ...

core  

A reappraisal of the Middle to Later Stone Age prehistory of Morocco Réévaluer la préhistoire du Maroc, du Middle Stone Age au Later Stone Age

Journal of the Royal Anthropological Institute, EarlyView.
Over the last 25 years, perceptions of the early prehistory of Northwest Africa have undergone radical changes due to new fieldwork projects and a corresponding growth in scientific interest in the region. Much of this work has been focused in Morocco, known for its extremely rich fossil and archaeological records in caves and rock shelters.
Nick Barton, Abdeljalil Bouzouggar, Stacy Carolin, Louise Humphrey   +3 more
wiley   +1 more source

Late Neogene, Seismic stratigraphy, Biostratigraphy, Mollusca, Evolution, Pannonian basin

Geologia Croatica, 2010
The combined use of seismic stratigraphy and mollusc biostratigraphy in Late Neogene lacustrine deposits of the Pannonian basin offers three new approaches:First, the comparison of seismic facies and biofacies facilitates to make a distinction between ...
Josipa Velić, Goran Durn
doaj   +1 more source

Curie: Constraining Solar System Bombardment Using In Situ Radiometric Dating [PDF]

, 2018
The Curie mission would constrain the existence of the putative cataclysm by determining the age of samples directly sourced from the impact melt sheet of a major pre-Imbrium lunar basin.
Clegg, S. M., Cohen, B. A., Denevi, B. W., Dyar, M. E., Elardo, S. M., Grinspoon, D. H., Hiesinger, H., Lawrence, S. J., Liu, Y., McCanta, M. C., Moriarty, D. P., Norman, M. D., Petro, N. E., Runyon, K. D., Schwenzer, S. P., Swindle, T. D., van der Bogart, C. H., Wiens, R. C.   +17 more
core  

Bayesian total evidence dating reveals the recent crown radiation of penguins [PDF]

, 2016
The total-evidence approach to divergence-time dating uses molecular and morphological data from extant and fossil species to infer phylogenetic relationships, species divergence times, and macroevolutionary parameters in a single coherent framework ...
Drummond, Alexei J., Gavryushkina, Alexandra, Heath, Tracy A., Ksepka, Daniel T., Stadler, Tanja, Welch, David   +5 more
core   +5 more sources

Fats, Fire and Bronze Age Funerary Rites: Organic Residue Analysis of Wide Horizontal Rim Vessels From Burial Contexts in Northwest Portugal

Archaeometry, EarlyView.
ABSTRACT This study presents the first GC‐MS–based analyses of wide horizontal rim vessels with well‐defined funerary contexts, from Middle Bronze Age Portugal (Quinta do Amorim 2 and Pego). Organic residues from two vessels revealed ruminant fats and plant oils, alongside molecular markers of heat exposure.
João Vinícius Back, César Oliveira, Ana M. S. Bettencourt, Hugo Aluai Sampaio, Luciano Vilas Boas, Luís Gonçalves   +5 more
wiley   +1 more source