Results 101 to 110 of about 19,763,523 (261)

New bounds on the hyper-Zagreb index for the simple connected graphs

, 2018
The hyper-Zagreb index of a simple connected graph G is defined by χ2(G) = ∑uv ∈ E(G)(d(u) + d(v))2. In this paper, we establish, analyze and compare some new upper bounds on the Hyper-Zagreb index in terms of the number of vertices n, number of edges m,
Mohammad Ali Rostami, Suresh Elumalai, Toufik Mansour   +2 more
core   +1 more source

Relational Intensification in Families During COVID‐19: A Comparative Study of Slovenia and Croatia

Family Relations, EarlyView.
ABSTRACT Objective This study examines how young people in Slovenia and Croatia perceived changes in family satisfaction, parent–child relationship quality, and family influence on important decisions before, during, and after the COVID‐19 pandemic. Background Pandemic restrictions redirected daily life toward family contexts and intensified family co ...
Andrej Naterer, Dunja Potočnik, Danijela Lahe   +2 more
wiley   +1 more source

Zagreb Connection Indices of Subdivision and Semi-Total Point Operations on Graphs

Journal of Chemistry, 2019
Representation or coding of the molecular graphs with the help of numerical numbers plays a vital role in the studies of physicochemical and structural properties of the chemical compounds that are involved in the molecular graphs.
Jiang-Hua Tang, Usman Ali, Muhammad Javaid, Khurram Shabbir   +3 more
doaj   +1 more source

MAXIMAL GRAPHS OF THE FIRST REVERSE ZAGREB BETA INDEX

, 2018
The reverse vertex degree of a vertex v of a simple connected graph G defined as; c(v) = Delta - d(v) + 1 where Delta denotes the largest of all degrees of vertices of G and d(v) denotes the number of edges incident to v.
Ediz, Süleyman
core  

Nano-Zagreb Index and Multiplicative Nano-Zagreb Index of Some Graph Operations [PDF]

, 2019
Let G be a graph with vertex set V(G) and edge set E(G). The Nano-Zagreb and multiplicative Nano-Zagreb indices of G are NZ(G) = \prod_{uv \in E(G)} (d^2(u) - d^2(v)) and N*Z(G) = \prod_{uv \in E(G)} (d^2(u) - d^2(v)), respectively, where d(v) is the ...
Jahanbani, Akbar, Shooshtary, Hajar
core   +1 more source

Diagnostic and Treatment Availability of von Willebrand Disease Within Europe: Insights From a European Association for Hemophilia and Allied Disorders (EAHAD) Survey

Haemophilia, EarlyView.
ABSTRACT Background Von Willebrand disease (VWD) is the most common inherited bleeding disorder, yet its diagnosis and management remain heterogeneous across Europe due to variable access to diagnosis and care. Aim To characterize diagnostic and treatment practices for VWD across European hemophilia centers.
Omid Seidizadeh, Ana Boban, Susie Shapiro, Riitta Lassila, Sophie Susen, Hamideh Yadegari, Laura Quintas Lorenzo, James S. O'Donnell, Giancarlo Castaman, Jeroen Eikenboom, EAHAD von Willebrand Disease Working Group   +10 more
wiley   +1 more source

Sharp bounds for the first Zagreb index and first Zagreb coindex [PDF]

Miskolc Mathematical Notes, 2015
Milovanovic, Emina, Milovanovic, Igor
openaire   +2 more sources

Dragonfly taxonomic and functional responses to urbanized streams in southeastern Europe, with management recommendations

Insect Conservation and Diversity, EarlyView.
Urbanization drives turnover in dragonfly species composition, traits, and habitat conservation value. Natural stream sections have a higher conservation value (higher DBI) due to presence of specialists. Properly managed urban streams can support diverse dragonfly assemblages.
Marina Vilenica, Andreja Brigić, Lea Ružanović, Renata Matoničkin Kepčija, Greet De Knijf, Michael J. Samways   +5 more
wiley   +1 more source

Intensive Care Unit Nurses' Perceptions of Work Environments: A Cross‐Sectional Study From Five European Counties

Journal of Advanced Nursing, EarlyView.
ABSTRACT Aim To explore intensive care nurses' perceptions of their work environments at the unit and organisational levels according to the American Association of Critical Care Nurses standards, their impact on care quality, national differences, and demographic associations. Design Cross‐sectional study using a survey design. Methods Study conducted
Εvanthia Georgiou, Meropi Mpouzika, Mireia Llaurado‐Serra, Adriano Friganović, Adrian Sabou, Aleksandra Gutysz‐Wojnicka, Anca Constantinescu‐Dobra, Cristina Alfonso‐Arias, Estel Curado‐Santos, Jelena Slijepcevic, Mădălina‐Alexandra Coțiu, Beata Penar‐Zadarko, Slađana Režić, Beata Dobrowolska, Maria Kyranou   +14 more
wiley   +1 more source

On Some Properties of Fuzzy Topological Indices of Honeycomb Graph

Journal of Mathematics
The primary contribution of this paper is the characterization of a novel graph structure, the fuzzy honeycomb network, through the lens of fuzzy molecular descriptors.
Sana Shafqat, Naveed Yaqoob, Aliya Javed
doaj   +1 more source