Results 31 to 40 of about 45,419 (109)

Quantitative Confounder Analysis of Electrocardiogram Signals in Cardiac Magnetic Resonance at 1.5, 3 and 7 T—Assessing Standardized Electrode Positions and Sequence Types—Towards Quality Assurance

Journal of Magnetic Resonance Imaging, Volume 63, Issue 4, Page 1140-1154, April 2026.
ABSTRACT Background The electrocardiogram (ECG) used for gating in cardiac MRI may be compromised by multiple confounders inside the scanner bore. Purpose To quantify the influence of magnetic field strengths (1.5 T/3 T/7 T), standardized electrode positions, and imaging sequences on ECG signals used for gating. Study Type Prospective.
Richard Hickstein, Stephanie Wiesemann, Darian Viezzer, Denise Kleindienst, Teodora Chitiboi, Bogdan Andrei Gheorghita, Jens Wetzl, Thomas Hadler, Sebastian Dietrich, Sebastian Schmitter, Jeanette Schulz‐Menger   +10 more
wiley   +1 more source

Covering properties defined by semi-open sets

, 2016
We study certain covering properties in topological spaces by using semi-open covers. A part of this article deals with Menger-type covering properties. The notions of s-Menger, almost s-Menger, star sMenger, almost star s-Menger, strongly star s-Menger ...
A. Sabah, M. Khan, L. Kočinac
semanticscholar   +1 more source

METAL-POOR, STRONGLY STAR-FORMING GALAXIES IN THE DEEP2 SURVEY: THE RELATIONSHIP BETWEEN STELLAR MASS, TEMPERATURE-BASED METALLICITY, AND STAR FORMATION RATE [PDF]

, 2014
We report on the discovery of 28 z ≈ 0.8 ?> metal-poor galaxies in DEEP2. These galaxies were selected for their detection of the weak [O iii] λ4363 emission line, which provides a “direct” measure of the gas-phase metallicity.
C. Ly, J. Rigby, M. Cooper, R. Yan
semanticscholar   +1 more source

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

Practical Applications of Secondary/Extractive Electrospray Ionization (SESI): A Versatile Tool for Real‐Time Chemical Analysis

Mass Spectrometry Reviews, Volume 45, Issue 2, Page 392-428, March/April 2026.
ABSTRACT In the 1980s, researchers discovered the remarkable ability of electrospray plumes to effectively ionize gas‐phase molecules via secondary ionization. Around 20 years later—coinciding with the ambient mass spectrometry revolution—secondary electrospray ionization (SESI) and extractive electrospray ionization (EESI) coupled to mass spectrometry
Xin Luo, Huiling Wang, Xiaolan Hu, Sasho Gligorovski, Xue Li, Pablo Sinues   +5 more
wiley   +1 more source

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

Counterexamples Regarding Linked and Lean Tree‐Decompositions of Infinite Graphs

Journal of Graph Theory, Volume 110, Issue 4, Page 398-407, December 2025.
ABSTRACT Kříž and Thomas showed that every (finite or infinite) graph of tree‐width k ∈ N admits a lean tree‐decomposition of width k. We discuss a number of counterexamples demonstrating the limits of possible generalisations of their result to arbitrary infinite tree‐width.
Sandra Albrechtsen, Raphael W. Jacobs, Paul Knappe, Max Pitz   +3 more
wiley   +1 more source