Results 41 to 50 of about 19,763,523 (261)

Computing Topological Descriptors and Polynomials of Certain 2D Chemical Structures

Journal of Chemistry, 2021
In the fields of mathematical chemistry, a topological index, also known as a connectivity index, is a type of a molecular descriptor that is calculated based on the molecular graph of a chemical compound.
Muhammad Mubashir Izhar, Zahida Perveen, Dalal Alrowaili, Mehran Azeem, Imran Siddique, Shahid Imran, Muhammad Shoaib Sardar   +6 more
doaj   +1 more source

Topological Evaluation of Four Para-Line Graphs Absolute Pentacene Graphs Using Topological Indices

International Journal of Analysis and Applications, 2023
A real-number to molecular structure mapping is a topological index. It is a graph invariant method for describing physico-chemical properties of molecular structures specific substances. In that article, We examined pentacene’s chemical composition. The
Mukhtar Ahmad, Muhammad Jafar Hussain, Gulnaz Atta, Sajid Raza, Irfan Waheed, Ather Qayyum   +5 more
doaj   +1 more source

The unofficial economy in Croatia: causes, size and consequences [PDF]

, 1997
This Occasional Paper reports the research results of a project on the unofficial economy in Croatia conducted by the Institute of Public Finance in Zagreb for the Croatian Ministry of Finance.
Bicanic, Ivo, Ott, Katarina, Katarina Ott, Ivo Bićanić   +3 more
core   +1 more source

On hyper-Zagreb index conditions for hamiltonicity of graphs [PDF]

, 2022
summary:During the last decade, several research groups have published results on sufficient conditions for the hamiltonicity of graphs by using some topological indices. We mainly study hyper-Zagreb index and some hamiltonian properties.
Zhou, Qiannan, Lu, Yong
core   +1 more source

SOME CHEMICAL TOPOLOGICAL INDICES FOR THE COPRIME GRAPH OF THE INTEGERS MODULO GROUP

Barekeng
This paper delves into the exploration of the coprime graph of a finite group G, a graph with vertices representing all group elements. Vertices x and y are considered adjacent in ΓG if their orders are relatively prime.
Gustina Elfiyanti, Mutia Nofita Sari, I Gede Adhitya Wisnu Wardhana, Ade Candra, Ghazali Semil Ismail   +4 more
doaj   +1 more source

Some Upper Bounds on the First General Zagreb Index

Journal of Mathematics, 2022
The first general Zagreb index MγG or zeroth-order general Randić index of a graph G is defined as MγG=∑v∈Vdvγ where γ is any nonzero real number, dv is the degree of the vertex v and γ=2 gives the classical first Zagreb index.
Muhammad Kamran Jamil, Aisha Javed, Ebenezer Bonyah, Iqra Zaman   +3 more
doaj   +1 more source

Extremal hyper-Zagreb index of trees of given segments with applications to regression modeling in QSPR studies

Alexandria Engineering Journal, 2023
Introduced by Gutman & Trinajstić in 1972, the two well-known Zagreb indices efficiently determine the total π-electron energy of alternant hydrocarbons. The hyper-Zagreb index is a variant of the classical first Zagreb index.
Sakander Hayat, Muhammad Adil Khan, Asad Khan, Haziq Jamil, Muhammad Yasir Hayat Malik   +4 more
doaj   +1 more source

Hyper-Zagreb index in fuzzy environment and its application

Heliyon
The Zagreb indices (ZIs) are important graph invariants that are used extensively in many different fields in mathematics and chemistry, such as network theory, spectral graph theory, fuzzy graph theory (FGT) and molecular chemistry, etc. The hyper-ZI is
Sk Rabiul Islam, Bandar Bin Mohsin, Madhumangal Pal   +2 more
doaj   +1 more source

Achieving High ON State Current through Ferroelectric Polarization‐Dependent Interfacial Resistance Switching in Undoped Orthorhombic HfO2 Films

Advanced Functional Materials, EarlyView.
Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand, Nuno Estrócio, Ji S. Kim, Babak Bakhit, Marian C. Istrate, Corneliu Ghica, Tiago Rebelo, Nives Strkalj, Abin Varghese, Bernardo Almeida, Luís S. Marques, Bipin Rajendran, Judith L. MacManus‐Driscoll, José P. B. Silva   +13 more
wiley   +1 more source

Consumer Preferences for Craft Beer: The Interplay of Localness and Advertising Language

Agribusiness, EarlyView.
ABSTRACT This study explores the influence of the language of the label, origin of production, and origin of brewing ingredients on Croatian consumers' preferences and willingness to pay for organic craft beer. Employing an online survey and a choice experiment among 223 Croatian alcohol consumers, we find that while there's a willingness to pay a ...
Marija Cerjak, Claudia Bazzani, Andreas C. Drichoutis   +2 more
wiley   +1 more source