Results 91 to 100 of about 23,977 (218)

Disparate and parallel craniofacial climatic adaptations in native populations of Asia, North America, and South America

Journal of Anatomy, Volume 245, Issue 5, Page 699-724, November 2024.
This study examines the influence of climate on human evolution using a large dataset (>2500 individuals) and combines morphometric analysis, genomic data, and various statistical techniques. It reveals distinct morphological traits in cold‐region populations, like increased nasal height and reduced facial protrusion, but also differences such as those
Andrej Evteev, Taisiya Syutkina, Alexandra Grosheva, Patrícia Santos, Silvia Ghirotto, Tsunehiko Hanihara, Mark Hubbe, Lumila Paula Menéndez   +7 more
wiley   +1 more source

Submillimeter observing conditions on Cerro Chajnantor [PDF]

, 2008
Consistently superb observing conditions are crucial for achieving the scientific objectives of a ground based telescope. For observations at submillimeter wavelengths, choosing a site with very little atmospheric water vapor is paramount.
Giovanelli, Riccardo, Gull, George E., Henderson, Charles P., Radford, Simon J. E.   +3 more
core  

Multiwavelength Light Curve Parameters of Cepheid Variables [PDF]

, 2017
We present a comparative analysis of theoretical and observed light curves of Cepheid variables using Fourier decomposition. The theoretical light curves at multiple wavelengths are generated using stellar pulsation models for chemical compositions ...
Bhardwaj, Anupam, Kanbur, Shashi M., Marconi, Marcella, Ngeow, Chow-Choong, Rejkuba, Marina, Singh, Harinder P.   +5 more
core   +1 more source

El complejo psicotrópico en Solcor 3 (San Pedro de Atacama)

Estudios atacameños, 1988
San Pedro de Atacama es reconocido en el ámbito de la arqueología por el alto número de tabletas y tubos que, por asociación etnográfica, sabemos que se relacionan con la esfera chamánica. En los registros de Le Paige hemos contabilizado 522 tabletas, en una muestra de 20 cementerios con un total de 2574 tumbas; esto representa un promedio de 20% de ...
Agustín Llagostera Martínez, Manuel Torres, María Antonietta Costa Junqueira   +2 more
openaire   +3 more sources

Species delimitation in Xanthium sect. Acanthoxanthium (Heliantheae, Asteraceae) and the neglected species Xanthium argenteum

TAXON, Volume 73, Issue 5, Page 1251-1271, October 2024.
Abstract Xanthium is a genus of annual herbaceous plants that stands out within Asteraceae for being wind‐pollinated, diclinous monoecious, and bearing solitary pistillate flowers in peculiar spiny structures (burs). Xanthium sect. Acanthoxanthium is native to South America and characterized by the presence of trifurcate spines at the base of the ...
Eleonora Manzo, Sebastian Nillies, Diego G. Gutiérrez, José L. Panero, Christian Bräuchler, Salvatore Tomasello   +5 more
wiley   +1 more source

The Geoglyphs of the Atacama Desert: A Bond of Landscape and Mobility [PDF]

, 2012
In the northern-most area of Chile, stretching six hundred miles down the coast of South America and expanding more than forty thousand square miles into Bolivia, Peru and Argentina lies the Atacama Desert.
Labash, Marika
core   +2 more sources

The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument [PDF]

, 2016
The Atacama Cosmology Telescope (ACT) is designed to make high angular resolution measurements of anisotropies in the Cosmic Microwave Background (CMB) at millimeter wavelengths.
Ade, P. A. R., Aiola, S., Amiri, M., Angile, F. E., Beall, J. A., Becker, D. T., Cho, H-M., Choi, S. K., Corlies, P., Coughlin, K. P., Datta, R., Devlin, M. J., Dicker, S. R., Dunner, R., Fowler, J. W., Fox, A. E., Gallardo, P. A., Gao, J., Grace, E., Halpern, M., Hasselfield, M., Henderson, S. W., Hilton, G. C., Hincks, A. D., Ho, S. P., Hubmayr, J., Irwin, K. D., Klein, J., Koopman, B., Li, Dale, Louis, T., Lungu, M., Maurin, L., McMahon, J., Munson, C. D., Naess, S., Nati, F., Newburgh, L., Nibarger, J., Niemack, M. D., Niraula, P., Nolta, M. R., Page, L. A., Pappas, C. G., Schillaci, A., Schmitt, B. L., Sehgal, N., Sievers, J. L., Simon, S. M., Staggs, S. T., Thornton, R. J., Tucker, C., Uehara, M., van Lanen, J., Ward, J. T., Wollack, E. J.   +55 more
core   +4 more sources

Soil carbon and nitrogen cycling at the atmosphere–soil interface: Quantifying the responses of biocrust–soil interactions to global change

Global Change Biology, Volume 30, Issue 10, October 2024.
Despite the critical role of biological soil crusts (biocrusts) in dryland C and N cycles, little is known about how biocrust‐derived C and N move into the soil. This study reveals how biocrusts facilitate the downward movement of C and N and drive the formation of mineral‐associated organic matter in subcrust soils.
K. Witzgall, B. D. Hesse, N. L. Pacay‐Barrientos, J. Jansa, O. Seguel, R. Oses, F. Buegger, J. Guigue, C. Rojas, K. Rousk, T. E. E. Grams, N. Pietrasiak, C. W. Mueller   +12 more
wiley   +1 more source

Introducción al trabajo de la Dra. Myriam Tarragó de Font

Estudios Atacameños, 1976
¿Cómo agradecer a la Dra. Myriam Tarragó de Font por su estudio tan completo y detallado? Desgraciadamente este importante aporte científico estaba ya casi listo en el tiempo del Congreso de Americanistas en Mar del Plata (1966) y permanecía inédito ...
Gustavo Le Paige de Walque
doaj   +1 more source

CCAT [PDF]

, 2009
Star formation, which drives the evolution of baryonic matter in the universe, occurs in the densest regions of the interstellar medium. As a result much of the emergent short wavelength radiation, UV to near IR, is absorbed by intervening dust and ...
Giovanelli, Riccardo, Radford, Simon J. E., Sebring, Thomas A., Zmuidzinas, Jonas   +3 more
core