Results 71 to 80 of about 1,244,965 (221)

The impacts of large wild grazers on soil carbon persistence are strongly modulated by the environmental context

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Wild animals, particularly large mammalian grazers, can influence ecosystem carbon dynamics and soil carbon sequestration. However, we lack a mechanistic understanding of how wild grazer communities influence soil carbon persistence, specifically in terms of the size of
Olli P. Hyvärinen, Mariska te Beest, Elizabeth le Roux, Graham I. H. Kerley, Nicola Findlay, Walter D. C. Schenkeveld, Guusje Koorneef, Katja Heister, Jeppe A. Kristensen, Victor Trouw, Joris P. G. M. Cromsigt   +10 more
wiley   +1 more source

Assimilation of endmember variability in spectral for urban land cover extraction mixture analysis

, 2013
Variable Endmember Constrained Least Square (VECLS) technique is proposed to account endmember variability in the linear mixture model by incorporating the variance for each class, the signals of which varies from pixel to pixel due to change in urban ...
Ramachandra, TV, Kumar, Uttam, Raja, Kumar S, Mukhopadhyay, Chiranjit   +3 more
core   +1 more source

A Spectral Unmixing Method by Maximum Margin Criterion and Derivative Weights to Address Spectral Variability in Hyperspectral Imagery

Remote Sensing, 2019
Limited to the low spatial resolution of the hyperspectral imaging sensor, mixed pixels are inevitable in hyperspectral images. Therefore, to obtain the endmembers and corresponding fractions in mixed pixels, hyperspectral unmixing becomes a hot spot in ...
Yang Shao, Jinhui Lan
doaj   +1 more source

P‐T Uncertainty in Subsolidus Metamorphic Systems: Sources, Patterns and Controls

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Phase equilibrium modelling of metamorphic rocks is subject to multiple, superimposed sources of uncertainty that affect pressure–temperature (P$$ P $$‐T$$ T $$) estimates, making it difficult to independently distinguish and evaluate the contribution of each source.
I. P. Cawood, T. Mackay‐Champion
wiley   +1 more source

Region-Based Estimate of Endmember Variances for Hyperspectral Image Unmixing

, 2016
Endmember variability is receiving growing attention in the hyperspectral image (HSI) unmixing field. As an extension of linear mixing model (LMM), normal compositional model (NCM) assumes that the pixels of the HSI are linear combinations of random ...
Zhang, Bing, Gao, Lianru, Zhuang, Lina
core   +1 more source

Artefact‐aware Brillouin microscopy framework for root mechanical phenotyping

Journal of Microscopy, EarlyView.
Abstract Plant roots continuously sense and respond to the mechanical signals of their growth environment: root cap function, mucilage secretion, and hormonal regulation jointly adapt root tip mechanics, shaping whether roots penetrate compacted layers or reorient around obstacles. Most current measurements of root mechanical properties require removal
Timm Landes, Ole Christian Hammerschmidt, Leon Pascal Wallentin, Ghulam Naseer Ud Din, Jacob Morsbach, Luis Alonso Baez, Dag Heinemann   +6 more
wiley   +1 more source

Self-supervised spectral unmixing using scene-aware deep priors

International Journal of Applied Earth Observations and Geoinformation
High spectral resolution of hyperspectral sensors facilitates the detailed identification of material, but the coarse spatial resolution affects accurate interpretation.
Soorya Suresh, Shri Charan Ramesh, Arun Pattathal Vijayakumar, Vandita Srivastava, Krishna Mohan Buddhiraju   +4 more
doaj   +1 more source

Diverse lithologies in Bennu stones revealed using X‐ray computed tomography under pristine conditions

Meteoritics &Planetary Science, EarlyView.
Abstract The OSIRIS‐REx mission collected a 121.6 g regolith sample from the surface of asteroid Bennu. Preliminary examination (PE) was conducted jointly by JSC Curation and the OSIRIS‐REx Sample Analysis Team. To enable advanced, non‐destructive characterization during PE, 59 centimeter‐scale stones were individually scanned using X‐ray computed ...
Scott A. Eckley, Nicole G. Lunning, Evan W. O'Neal, Julia Plummer, Rachel C. Funk, Curtis Calva, Wayland D. Connelly, Jannatul Ferdous, Gabriel C. Garcia, Neftali Hernandez, Gabriel Lugo, Salvador Martinez, Maritza Montoya, Erika V. Rivera, Daniel J. Rohmer, Francis M. McCubbin, Jemma Davidson, Timothy J. McCoy, Sara S. Russell, Pierre Haenecour, Jason P. Dworkin, Harold C. Connolly Jr., Dante S. Lauretta   +22 more
wiley   +1 more source

A Microkrystite from the Australasian Tektite/Microtektite Strewn Field

Meteoritics &Planetary Science, EarlyView.
Abstract Microkrystites are glassy impact spherules. They contain primary crystallites carrying information on the physical and chemical conditions prevailing during vaporization, melting, and ejection in large impact cratering events. We report on the geochemistry and mineralogy down to nanometer scale of the first microkrystite (ODP1144A,14) from the
Matteo Del Rio, Luigi Folco, Matteo Masotta, Ana Černok, Enrico Mugnaioli   +4 more
wiley   +1 more source

Protoplanetary disk evolution inferred from oxygen isotopes in anhydrous interplanetary dust particles

Meteoritics &Planetary Science, EarlyView.
Abstract Eight anhydrous interplanetary dust particles (IDPs) were analyzed for their oxygen isotopic compositions and mineralogy. They show oxygen isotopic compositions from 16O‐rich to 16O‐poor, due to mixing of different reservoirs inherited from the protosolar molecular cloud and the early solar nebula.
Birgit Schulz, Christian Vollmer, Peter Hoppe, Jan Leitner, Lindsay P. Keller   +4 more
wiley   +1 more source