Results 61 to 70 of about 722,873 (188)

Zagreb Polynomials and Redefined Zagreb Indices for Chemical Structures Helpful in the Treatment of COVID-19

Scientific Inquiry and Review, 2020
A topological index (TI) is a number that is helpful in predicting the properties of chemical compounds. We can estimate the physical and chemical properties of several chemical compounds. In this study, we compute Zagreb polynomials and the redefined Zagreb indices for chemical compounds used in the treatment of COVID-19 namely remdesivir, chloroquine,
openaire   +2 more sources

Demographic and Structural Variability Modulate Growth Dynamics in European Beech Primary Forests

Global Change Biology, Volume 32, Issue 5, May 2026.
Climate change is increasing drought and heat stress on European beech (Fagus sylvatica L.), causing widespread tree vitality losses and growth declines across Europe. Using a large tree ring network from montane primary beech forests, we found that trees of various ages and sizes respond differently to climate warming, leading to contrasting within ...
Krešimir Begović, Jakob Pavlin, Thomas Langbehn, Kristyna Svobodová Langbehn, Jakub Kašpar, Andrei Popa, Thomas A. Nagel, Jeňýk Hofmeister, Pavel Janda, Miloš Rydval, Daniel Kozak, Martin Mikoláš, Stjepan Mikac, Miroslav Svoboda   +13 more
wiley   +1 more source

Coloring and density theorems for configurations of a given volume

Proceedings of the London Mathematical Society, Volume 132, Issue 3, March 2026.
Abstract This is a treatise on finite point configurations spanning a fixed volume to be found in a single color‐class of an arbitrary finite (measurable) coloring of the Euclidean space Rn$\mathbb {R}^n$, or in a single large measurable subset A⊆Rn$A\subseteq \mathbb {R}^n$.
Vjekoslav Kovač
wiley   +1 more source

M-Polynomials and Topological Indices of Dominating David Derived Networks

Open Chemistry, 2018
There is a strong relationship between the chemical characteristics of chemical compounds and their molecular structures. Topological indices are numerical values associated with the chemical molecular graphs that help to understand the physical features,
Kang Shin Min, Nazeer Waqas, Gao Wei, Afzal Deeba, Gillani Syeda Nausheen   +4 more
doaj   +1 more source

The Interplay of Climate Change, Urbanisation, and Species Traits Shapes European Butterfly Population Trends

Global Ecology and Biogeography, Volume 35, Issue 2, February 2026.
ABSTRACT Aim To examine how butterfly population trends respond to climate change and urbanisation at a continental scale, and whether responses differ between urban and rural environments. Location 869 sites across 12 European countries, spanning six bioclimatic zones. Time Period 1976–2021. Major Taxa Studied Butterflies (Lepidoptera).
Pau Colom, Ashley Tejeda, Simona Bonelli, Benoît Fontaine, Mikko Kuussaari, Dirk Maes, Xavier Mestdagh, Miguel L. Munguira, Martin Musche, Lars B. Pettersson, David Roy, Johannes Rüdisser, Martina Šašić, Reto Schmucki, Constanti Stefanescu, Nicolas Titeux, Josef Settele, Chris van Swaay, Javier Gordillo, Yolanda Melero   +19 more
wiley   +1 more source

Microelectrode recordings from the human cervical vagus nerve during maximal breath‐holds

Experimental Physiology, Volume 111, Issue 2, Page 501-516, 1 February 2026.
Abstract Voluntary breath‐holds can be sustained for a long time following training, but ultimately, regardless of duration, the asphyxic break‐point is reached and the apnoea terminated. The physiological changes occurring during the apnoea include a marked increase in sympathetically‐mediated vasoconstriction in non‐essential organs, such as skeletal
Vaughan G. Macefield, Anthony R. Bain, Matthew I. Badour, Marko Kumric, Ivan Drvis, Otto F. Barak, Josko Bozic, Zeljko Dujic   +7 more
wiley   +1 more source

A Remark on the Energy Bounds and Degree-Based Topological Indices of the Zero-Divisor Graph ℤₚ[x]/⟨x⁴⟩

Science and Technology Indonesia
The zero-divisor graph of a commutative ring, Γ(R), is a prominent subject in graph theory. Previous research has investigated the energy and topological indices of Γ(ℤₚ[x]/⟨x⁴⟩) for any prime p; however, errors were identified in the characteristic ...
Vira Hari Krisnawati, Ayunda Faizatul Musyarrofah, Ari Andari   +2 more
doaj   +1 more source

SubeYa: A System for Predicting Passenger Demand at Train Stations

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
This study addresses the challenges of urban congestion and long wait times within EL1ML by introducing SubeYa, a web‐based platform designed to predict passenger demand. By utilizing the Prophet predictive model and analysing historical data from 2019 to 2025, the system achieves a global MAE of 259.10.
Angelo Meza, Annsherly Acuña, José Santisteban   +2 more
wiley   +1 more source

On QSPR Modeling and SAW‐Based Ranking of Laryngeal Cancer Drugs Using Temperature‐Based Topological Indices and Support Vector Regression

Complexity, Volume 2026, Issue 1, 2026.
QSPR modeling offers an effective tool for predicting the physicochemical properties of pharmaceutical molecules by applying molecular descriptors. In this research paper, a new QSPR method based on the temperature‐based topological indices in graph theory is presented for analyzing selected drugs that are relevant to laryngeal cancer.
Nazek Alessa, Hasnain Hayat, Muhammad Kamran Siddiqui, Samuel Asefa Fufa, Hassan Zargarzadeh   +4 more
wiley   +1 more source

Zagreb Polynomial and Redefined Zagreb Indices of Copper Oxide

Journal of New Horizons in Mathematics
In mathematical chemistry, topological indices are crucial for predicting chemical properties and analyzing molecular structures. The Zagreb indices and their redefined versions are widely used to characterize molecular graphs based on vertex degrees, which correlate with various physicochemical properties.
openaire   +1 more source