Results 31 to 40 of about 1,957 (103)

Patterns of understorey bird diversity across Amazonian forests: survey effort and range maps predict local species richness

Ecography, Volume 2026, Issue 3, March 2026.
Species diversity typically increases from higher to lower latitudes, but the regional‐scale variation along this geographic gradient remains unclear. It has been suggested that species diversity throughout Amazonia generally increases westward toward the Andes, but this pattern and its environmental determinants require further investigation for most ...
Pilar L. Maia‐ Braga, Anderson S. Bueno, Marina F. A. Maximiano, Torbjørn Haugaasen, Marina Anciães, John G. Blake, Bette A. Loiselle, Sergio H. Borges, Juliana Menger, Sidnei Dantas, Ramiro D. Melinski, Affonso H. N. Souza, Fernando H. T. de Abreu, Roberta L. Boss, Carlos A. Peres   +14 more
wiley   +1 more source

Effect of Subphase Ions on Multilayer Deposition of an Anionic Gemini Surfactant on Solid Substrates

Journal of Surfactants and Detergents, Volume 29, Issue 2, Page 221-231, March 2026.
Multilayer formation in Gemini surfactant films with subphase ions. ABSTRACT A recently reported anionic Gemini surfactant belonging to the “minimal linker” family has been shown to form closely packed crystalline monolayers at the air–water interface, like a simple fatty acid, but its ability to deposit onto solid substrates as multilayer films ...
Alfred Yeboah, Thuat Nguyen, Beatriz Moreno Diaz, Matthew F. Paige   +3 more
wiley   +1 more source

A fixed point theorem in Menger space

, 1970
The purpose of this paper is to introduce the concept of weakly compatible maps in Menger space and prove a common fixed point theorem in this space.2010 Mathematics Subject Classification: 54H25.Keywords: Triangle norm; Menger space; Fixed point theorem;
Sunny Chauhan, BD Pant
core   +1 more source

A Joint Inversion Algorithm of GNSS and InSAR for Continuous 3‐D Surface Velocities and Associated Horizontal Strain Rate Field

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Simultaneous analyses of complementary GNSS and InSAR measurements may lead to breakthroughs in our understanding of crustal deformation. We present an algorithm that combines InSAR with GNSS measurements, in which the GNSS data can be used either as original station velocities or as an interpolated and smoothed velocity field, to estimate ...
Jeonghyeop Kim, Mradula Vashishtha, William E. Holt, Kyle D. Murray, Rowena B. Lohman   +4 more
wiley   +1 more source

Common fixed point theorem for occasionally weakly compatible mappings in Menger space [PDF]

, 2011
The concept of occasionally weakly compatible (shortly, owc) mappings introduced by Al-Thagafi and Shahzad [2], which is more general than the concept of weakly compatible maps.
Sunny Chauhan, B.D. Pant
core  

A tropical approach to rigidity: Counting realisations of frameworks

Journal of the London Mathematical Society, Volume 113, Issue 2, February 2026.
Abstract A realisation of a graph in the plane as a bar‐joint framework is rigid if there are finitely many other realisations, up to isometries, with the same edge lengths. Each of these finitely many realisations can be seen as a solution to a system of quadratic equations prescribing the distances between pairs of points.
Oliver Clarke, Sean Dewar, Daniel Green Tripp, James Maxwell, Anthony Nixon, Yue Ren, Ben Smith   +6 more
wiley   +1 more source

Supraparticles from Titania Nanoplates: Assembly, Photocatalytic Polymer Encapsulation, Functionalization, and Multifunctional Hybrid Supraparticles

Small Structures, Volume 7, Issue 1, January 2026.
Titania nanoplates are assembled into supraparticles (SPs) using an emulsion‐based technique. These SPs are encapsulated within a polystyrene shell, applying a surface‐initiated photocatalyzed radical polymerization procedure. By varying the duration of UV light exposure, the organic fraction of the polymer is tunable.
Jana Struck, Lea R. Klauke, Florian Schur, Benedikt Sochor, Malte Holzapfel, Neus Feliu, Sarathlal Koyiloth Vayalil, Nadja C. Bigall, Tobias Vossmeyer   +8 more
wiley   +1 more source

Hall's marriage theorem

Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.
Abstract In 1935, Philip Hall published what is often referred to as ‘Hall's marriage theorem’ in a short paper (P. Hall, J. Lond. Math. Soc. (1) 10 (1935), no. 1, 26–30.) This paper has been very influential. I state the theorem and outline Hall's proof, together with some equivalent (or stronger) earlier results, and proceed to discuss some the many ...
Peter J. Cameron
wiley   +1 more source

Habitat heterogeneity and food availability in beaver‐engineered streams foster bat richness, activity and feeding

Journal of Animal Ecology, Volume 94, Issue 12, Page 2403-2420, December 2025.
Beavers reshape ecosystems in ways that benefit bat richness, activity and feeding activity. We linked increased habitat structures (standing deadwood and canopy heterogeneity) and prey abundance to higher bat activity. Our findings uncover how beavers drive biodiversity across aquatic‐terrestrial boundaries.
Valentin Moser, Leonardo Capitani, Luca Zehnder, Alex Hürbin, Martin K. Obrist, Klaus Ecker, Steffen Boch, Silvan Minnig, Christof Angst, Francesco Pomati, Anita C. Risch   +10 more
wiley   +1 more source

Weak infinite-dimensionality in Cartesian products with the Menger Property

, 1995
The Menger Property is a classical covering counterpart to σ-compactness. Assuming the Continuum Hypothesis we construct, for each natural n, a separable metrizable space whose nth power is weakly infinite-dimensional and (n + 1)th power has the Menger ...
Pol, Roman
core   +1 more source