Results 81 to 90 of about 6,739 (277)

A Triple‐Nanoparticle System for Controlled Graphene Nanosheet Stacking: Enabling K/Na‐Ion Battery Anodes with Ultra‐Fast Charging Exceeding Petroleum Vehicle Refueling

Advanced Science, EarlyView.
ABSTRACT Large‐ion (K, Na) battery systems mitigate uneven global lithium distribution, while their ability to attain recharge time shorter than refueling would remove the final barrier for secondary batteries to replace petroleum vehicles. However, their large‐ion chemistry makes ultra‐fast charging an even significant challenge.
Shukai Ding, Le Zhang, Hang Li, Yang Zhang, Guoquan Suo, Bin Han, Dongfeng Sun, Wenqi Zhao, Gaohui Du, Qingmei Su, Bingshe Xu, Zhen Xu, Wei Wang   +12 more
wiley   +1 more source

Site‐Selective B─H Activation via HAT Toward Xanthyl‐closo‐Carboranes as Bench‐Stable Precursors of Organosulfur Boron Clusters

Angewandte Chemie, EarlyView.
A light mediated direct regioselective B─H functionalization, via hydrogen atom transfer (HAT), is described. Unexplored xanthyl‐closo‐carboranes as novel bench‐stable and versatile platforms to access sulfur‐containing boron clusters are reported for the first time.
Marco Rusconi, Eugenia Magi, Polyssena Renzi, Emanuele Azzi, Valeria Lagostina, Enrico Salvadori, Mario Chiesa, Birgit Hischa, Giovanni Ghigo, Annamaria Deagostino   +9 more
wiley   +2 more sources

Alpha labelings of full hexagonal caterpillars

AKCE International Journal of Graphs and Combinatorics, 2016
Barrientos and Minion (2015) introduced the notion of generalized snake polyomino graphs and proved that when the cells are either squares or hexagons, then they admit an alpha labeling. Froncek et al.
Dalibor Froncek
doaj   +1 more source

ON k-GRACEFUL LABELING OF SOME GRAPHS

Journal of applied mathematics & informatics, 2016
Summary: In this paper, it has been shown that the hairy cycle \(C_{n}\odot rK_{1},\) \(n\equiv 3\pmod 4\), the graph obtained by adding pendant edge to each pendant vertex of hairy cycle \(C_{n}\odot 1K_{1}\), \(n\equiv 0\pmod 4\), double graph of path \(P_{n}\) and double graph of comb \(P_{n}\odot 1K_{1}\) are \(k\)-graceful.
Pradhan, P., Kumar, Kamesh
openaire   +3 more sources

Structural Insights Into Man9 Recognition by the HIV Antibody 2G12 Revealed by Paramagnetic NMR

Advanced Science, EarlyView.
The HIV gp120 glycoprotein displays Man9 oligomannose structures that are recognized by the neutralizing antibody 2G12. Detailed characterization of the binding epitope in solution is important for immunogen design but remains challenging, since the signals of the terminal mannoses from the three arms of Man9 (D1, D2, and D3) cannot be distinguished in
Adrián Silva‐Díaz, Paola Oquist‐Phillips, Noelia de la Cruz, Inés Lera‐Lasso, Laura Castañar, Javier Rojo, Javier Ramos‐Soriano, Ángeles Canales   +7 more
wiley   +1 more source

The Graceful Coalescence of Alpha Cycles

Communications in Advanced Mathematical Sciences, 2019
The standard coalescence of two graphs is extended, allowing to identify two isomorphic subgraphs instead of a single vertex. It is proven here that any succesive coalescence of cycles of size $n$, where $n$ is divisible by four, results in an $\alpha ...
Christian Barrientos, Sarah Minion
doaj   +1 more source

Graceful Labeling of Balanced Stars of Paths

Electronic Notes in Discrete Mathematics, 2003
Abstract If the vertices of a tree on n vertices are labeled by the distinct numbers l,2,…, n , in such a way that the set of edge-differences (i.e., the differences between the labels on adjacent pairs of vertices) is exactly {1, 2,…, n − 1}, then such a labeling is called a graceful labeling. The graceful tree conjecture of Ringel and Kotzig
R. Badrinath, Pratima Panigrahi
openaire   +1 more source

A Worm‐Inspired Origami Robot with Multimodal Locomotion for Adaptive Mobility in Complex Pipeline Environments

Advanced Science, EarlyView.
An origami worm‐inspired robot achieves multimodal locomotion in confined pipelines through mechatronic integration that embeds actuation, control, and communication within each origami module. Large, reversible configuration and dimensional changes enable 25 gaits synthesized by a unified framework across peristaltic, inchworm, and wheel‐rolling modes
Qiwei Zhang, Kangning Tan, Zihan He, Hongsen Pang, Yanjie Wang, Hongbin Fang, Jian Xu   +6 more
wiley   +1 more source

Octagonal prime graceful labeling

Ratio Mathematica
Let G be a graph with p vertices and q edges. Define a bijection f : V (G) → {1, 8, ..., p(3p - 2)} by f(vi) = i(3i - 2) for every i from 1 to p and define a 1 - 1 mapping fopgl ∗ : E(G) → set of natural number N such that f∗(uv) = |f(u) - f(v)| for all ...
V Akshaya
doaj   +1 more source

Folding trees gracefully

AKCE International Journal of Graphs and Combinatorics, 2020
When a graceful labeling of a bipartite graph assigns the smaller labels to the vertices of one of the stable sets of the graph, the assignment is called an α-labeling. Any graph that admits such a labeling is an α-graph.
Christian Barrientos, Sarah Minion
doaj   +1 more source