Results 181 to 190 of about 81,316 (303)

Integration of Micro‐CT and XRF Mapping for Multimodal 3D Analysis of Polychrome Wooden Artifacts

X-Ray Spectrometry, EarlyView.
ABSTRACT Over the past 5 years, computer applications have become crucial to archeological research. Since the 1990s, the focus has transitioned from data management tools to the development of virtual models. Recently, digital documentation of cultural heritage has gained considerable focus, with 3D modeling of objects.
Josiane E. Cavalcante, Olga Araujo, Alessandra Machado, Roberta M. P. S. Borges, Isis V. N. S. Franzi, Anderson G. de Paula, Roberta Leitão, Marcelino dos Anjos, Renato Freitas, Ricardo T. Lopes, Davi F. Oliveira   +10 more
wiley   +1 more source

A novel strategy for the MPPT in a photovoltaic system via sliding modes control. [PDF]

PLoS One
Contreras Carmona I, Saldivar B, Portillo-Rodríguez O, Ramírez Rivera VM, Gil Antonio L, Jacinto-Villegas JM.   +5 more
europepmc   +1 more source

Energy Return on Investment (EROI) and Life Cycle Analysis (LCA) of biofuels in Ecuador. [PDF]

Heliyon, 2020
Chiriboga G, De La Rosa A, Molina C, Velarde S, Carvajal C G.   +4 more
europepmc   +1 more source

Portable, Benchtop and Micro‐XRF in Agriculture—Present and Future From the Hardware Perspective

X-Ray Spectrometry, EarlyView.
ABSTRACT X‐ray fluorescence (XRF) spectrometry has been an important tool in agricultural studies recently. This technique allows the multielemental, direct, and in situ analysis. The objective of this review is to evaluate the use of XRF in agriculture focusing on plant and soil samples based on indexed articles in the Scopus database from 2020 to ...
Eduardo de Almeida, Felipe Rodrigues Santos, Fabio Luiz Melquiades, Gabriel Sgarbiero Montanha, Tiago Rodrigues Tavares, Eduardo Santos, Higor José Freitas Alves da Silva, Hudson Wallace Pereira de Carvalho   +7 more
wiley   +1 more source

Subtracting Interferences in X‐Ray Spectra Obtained With Grating Spectrometers

X-Ray Spectrometry, EarlyView.
ABSTRACT Higher order diffraction from surface contamination poses a major challenge for soft x‐ray spectral analysis using reflection zone plate spectrometers in electron probe microanalysis. We developed two correction methods applied to the Al L2,3 and Zn M2,3 emissions in AlZn60 alloy spectra: sequential overlay and subtraction of C Kα and O Kα ...
Nawel Temmar, Philippe Jonnard, Karine Le Guen, Nicolas Rividi, Wanqiu Bai   +4 more
wiley   +1 more source

Enhancing the Catalytic Activity of Pd Nanocatalysts for Anion Exchange Membrane Direct Ethanol Fuel Cells by Functionalizing Vulcan XC-72 with Cu Organometallic Compounds. [PDF]

ACS Appl Nano Mater
Meléndez-González PC, Fuentez-Torres MO, Sánchez-Castro ME, Alonso-Lemus IL, Escobar-Morales B, Pech-Rodríguez WJ, Napporn TW, Rodríguez-Varela FJ.   +7 more
europepmc   +1 more source

Identifying Causes of Reproductive Failure in Zoo‐Housed Bush Dogs (Speothos venaticus) to Improve Ex Situ Management

Zoo Biology, EarlyView.
We distributed a survey to global institutions housing bush dogs (Speothos venaticus) to collect data on factors which may affect litter survival. Information from the Zoological Information Management System (ZIMS) and studbook records supplemented this dataset. We found that within northern temperate regions, the number of pups reared to the age of 1
Alice S. Clark, Veronica B. Cowl, Jane L. Hurst, Lisa Holmes, Paula Stockley   +4 more
wiley   +1 more source

Justificación de la inclusión dentro del OT4: Economía baja en Carbono, de las infraestructuras de interconexión de los Sistemas Eléctricos No Peninsulares con el Sistema Eléctrico Peninsular [PDF]

, 2015
Ministerio de Hacienda y Administraciones Públicas. Dirección General de Fondos Comunitarios. Subdirección General de Programación Territorial y Evaluación de Programas Comunitarios
core  

Household fuel mixes in peri-urban and rural Ecuador: Explaining the context of LPG, patterns of continued firewood use, and the challenges of induction cooking. [PDF]

Energy Policy, 2020
Gould CF, Schlesinger SB, Molina E, Bejarano ML, Valarezo A, Jack DW.   +5 more
europepmc   +1 more source

Hummingbird interaction niche packing is influenced by species richness and resource availability in the southern tropical Andes

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Niche partitioning is often considered an important mechanism promoting species co‐occurrence in species‐rich communities. As species richness increases, niche partitioning may lead to different niche structures, including increased packing of species niches when the ...
Bryan G. Rojas, Carlos Iván Espinosa, Catherine H. Graham, Boris A. Tinoco   +3 more
wiley   +1 more source