Results 111 to 120 of about 3,634,246 (271)

Cacti with maximum Kirchhoff index

, 2015
The concept of resistance distance was first proposed by Klein and Randić. The Kirchhoff index $Kf(G)$ of a graph $G$ is the sum of resistance distance between all pairs of vertices in $G$. A connected graph $G$ is called a cactus if each block of $G$ is either an edge or a cycle. Let $Cat(n;t)$ be the set of connected cacti possessing $n$ vertices and
Wang, Wen-Rui, Pan, Xiang-Feng
openaire   +2 more sources

Do Corporate ESG Disclosures Drive Consumer Demand (Sales)? The Role of Environmental Sensitivity

Business Strategy and the Environment, EarlyView.
ABSTRACT The question of whether strong environmental, social, and governance (ESG) disclosure largely benefits high‐demand customers or if it generates value across all sales levels is yet to be empirically verified. This study, therefore, examines how ESG performance influences consumer demand (sales outcomes) among listed firms across African ...
Idorenyin J. Okon, Adeolu O. Adewuyi, Alex O. Acheampong   +2 more
wiley   +1 more source

Simplified Small‐Signal Modeling Method for Non‐Isolated High Step‐Up Converters

International Journal of Circuit Theory and Applications, EarlyView.
A generalized small‐signal modeling methodology for a family of non‐isolated high step‐up DC‐DC converters is proposed. ABSTRACT This work presents a generalized small‐signal modeling methodology for a family of DC–DC converters based on the four‐state switching cell with a wide conversion range (WCR‐4SSC) operating in continuous conduction mode (CCM).
Samuel Antonio Macedo de Oliveira, Pedro Herysson Almeida da Silva, Fernando Lessa Tofoli, Dalton de Araújo Honório   +3 more
wiley   +1 more source

An improved lower bound for the degree Kirchhoff index of bipartite graphs [PDF]

Discrete Mathematics Letters, 2022
Ş. Burcu Bozkurt Altındağ, Igor Milovanović, Emina Milovanović, Marjan Matejić   +3 more
doaj   +1 more source

Nanostructured Optical Superabsorbers from Carbon Nanotube Forest for Heat Management Using Environmental Blackbody Radiation from the Visible to Mid‐Infrared

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Our computational model of the optical absorption from multiwalled carbon nanotubes suggests the optical absorption depends strongly on the in‐plane electrical conductivity, and weakly on the through‐plane conductivity. Such strong absorption enables solar‐to‐thermal conversion for heat scavenging in cold climates and radiative cooling in hot climates,
José V. Anguita, Zongtao Zhang, Kai Yang, Diane J. Roth, Charles J. Footer, Sajad Haq, Peter H. Aaen, Sunday Ekpo, S. Ravi P. Silva   +8 more
wiley   +1 more source

On the zeta Kirchhoff index of several graph transformations [PDF]

, 2020
In this paper, we first derived the Ihara zeta function, complexity and zeta Kirchhoff index of the k-th semitotal point graph (of regular graphs), a construction by Cui and Hou [5], where we create triangles for every edge in the original graph.
Cheuk, Danny
core   +1 more source

Investigating Signless Laplacian Spectra and Network Topology in Helical Phenylene-Quadrilateral Structures

Journal of Mathematics
This study investigates the spectral and topological properties of rounded knot networks K2n, a helical extension of phenylene quadrilateral structures, through signless Laplacian spectral analysis.
Fareeha Hanif, Ali Raza, Md. Shajib Ali
doaj   +1 more source

Research Progress of Three‐Terminal Perovskite/Silicon Tandem Solar Cells Based on Back‐Contact Silicon

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Perovskite/silicon tandem solar cells offer efficiencies beyond 30%, yet conventional architectures face trade‐offs between optical performance and current matching. Three‐terminal tandems employing silicon back‐contact bottom cells eliminate the current‐matching constraint while minimizing optical losses, offering superior energy yield under real ...
Yunhao Fan, Sheng Ma, Huanpei Huang, Zhengping Li, Wenzhong Shen   +4 more
wiley   +1 more source

Reduced patella medialization in valgus and varus knees using a KA‐optimized femoral component in kinematically aligned TKA

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose Patellofemoral complications after total knee arthroplasty (TKA) are linked to femoral component design and trochlear alignment. This study compared the effects of a kinematically aligned (KA)‐optimized femoral component versus a standard design on patellofemoral kinematics, contact mechanics and quadriceps function, using native knee ...
Johanna‐Maria Simon, Tara Mauritia Siedow, Christoph Thorwächter, Hannes Traxler, Katharina Kirchhoff, Felix Endres, Boris Michael Holzapfel, Peter Ernst Müller, Thomas Richard Niethammer   +8 more
wiley   +1 more source

Early Mpox Detection: Integrating Skin Lesion Imaging, Epidemiology, and Treatment for Deep Learning Approaches

Medicine Advances, EarlyView.
Research papers utilizing publicly available, web‐scraped resources related to mpox—including news portals and datasets such as Monkeypox2022, Kaggle, and the Monkeypox Skin Images Dataset—demonstrate variability in accuracy. Our findings suggest that although deep learning models such as MobileNetV2, VGG16, and GoogLeNet report accuracy exceeding 95%,
Taskin Sabit, Faiza Tasnim
wiley   +1 more source