Results 41 to 50 of about 1,014 (130)
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.The one‐pot hydrothermal prep of Co‐doped few‐layer 1T‐MoS2 shows Co‐S bonds stabilizing the 1T phase, enhancing supercapacitor performance. Few‐layered 1T‐MoS2 is highly promising for supercapacitor applications due to its wide interlayer spacing, high electrical conductivity, and abundant active sites.
Qingling Jia +4 more
wiley +1 more source
A Link to the Math. Connections Between Number Theory and Other Mathematical Topics [PDF]
, 2018 Number theory is one of the oldest mathematical areas. This is perhaps one of the reasons why there are many connections between number theory and other areas inside mathematics. This thesis is devoted to some of those connections.
Kreh, Martin
core +1 more source
Crystal Plane Engineering of Zn Nanosheet Arrays Toward Robust Hybrid Capacitive Energy Storage
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This work demonstrates a dual‐phase ZnCl2 concentration strategy dynamically switching Zn2+ solvation from [Zn(H2O)6]2+ to [ZnCl(H2O)5]+. The solvation shift steers the epitaxial growth of Zn nanosheet arrays, favoring the (002) crystal plane over (101).
Weijun Li +6 more
wiley +1 more source
An almost sharp quantitative version of the Duffin-Schaeffer conjecture [PDF]
We prove a quantitative version of the Duffin–Schaeffer conjecture with an almost sharp error term. Precisely, let ψ : N → [0, 1/2] be a function such that the series P∞ q=1 ϕ(q)ψ(q)/q diverges.
Koukoulopoulos, Dimitrious +2 more
core +3 more sources
Enhancing Supercapacitor Performance with Cassava Tuber- Bamboo Stem Blended Porous Activated Carbon: An Environmentally Friendly Approach [PDF]
Supercapacitor electrodes based on porous activated carbon from a blend of cassava tubers and bamboo stems were successfully synthesized using a chemical activation method with a 4M KOH activator.
Diantoro Markus +3 more
core +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A Ni single‐atom‐anchored N‐doped carbon hollow host synergizes atomic Ni‐N4 sites with a hierarchical porous skeleton, enabling high‐sulfur‐loading aqueous Zn–S batteries with high capacity, low polarization, and excellent cycling stability for flexible energy storage.
Zuoshu Wang +4 more
wiley +1 more source
On the Duffin-Schaeffer conjecture
, 2020 Let $\psi:\mathbb{N}\to\mathbb{R}_{\ge0}$ be an arbitrary function from the positive integers to the non-negative reals. Consider the set $\mathcal{A}$ of real numbers $\alpha$ for which there are infinitely many reduced fractions $a/q$ such that ...
Koukoulopoulos, Dimitris, Maynard, James
core
Microscale Templating of Functional Particles Using Self‐Limiting Electrospray Deposition
Small, EarlyView.Self‐limiting electrospray deposition (SLED) uses trapped charge in a growing film to redirect incoming material and produce highly targeted and uniform sprays. Here, nanoparticles are added to sprays to functionalize pre‐patterned electrodes and other devices.
Michael J. Grzenda +6 more
wiley +1 more source
Indeks Padmakar-Ivan dan indeks Randic pada graf non-koprima dari grup bilangan bulat modulo
Majalah Ilmiah Matematika dan StatistikaGraph theory, introduced by the Swiss mathematician Leonhard Euler in 1736, has played a pivotal role in solving real-world problems since its inception, notably exemplified by Euler's solution to the Konigsberg Bridge problem. Its applications extend to
Lalu Hasan Ghoffari +2 more
doaj +1 more source
Isomorphic gcd-graphs over polynomial rings
Gcd-graphs over the ring of integers modulo $n$ are a simple and elegant class of integral graphs. The study of these graphs connects multiple areas of mathematics, including graph theory, number theory, and ring theory. In a recent work, inspired by the analogy between number fields and function fields, we define and study gcd-graphs over polynomial ...
Mináč, Ján +2 more
openaire +2 more sources