Results 141 to 150 of about 797,150 (338)

The Fabrication of Fluorine‐Free Stretchable Superhydrophobic Films Using Inverse Vulcanization Sulfur Polymer

open access: yesAdvanced Materials Interfaces, EarlyView.
This study developed a new type of flexible, water‐repellent coating made from sulfur, a byproduct of the petrochemical industry, combined with silica nanoparticles, while demonstrating how coating thickness impacts fragmentation during stretching, affecting wettability.
Vinicius Diniz   +3 more
wiley   +1 more source

Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS

open access: yesAdvanced Materials Interfaces, EarlyView.
This research explores local bandgap, composition, and strain variations across InxGa₁−xAs quantum wells within a metamorphic laser structure using high‐resolution scanning transmission electron microscopy (STEM) and low‐loss electron energy loss spectroscopy (EELS). Results reveal significant inhomogeneities, particularly near interfaces, with bandgap
Nicholas Stephen   +10 more
wiley   +1 more source

Young children’s graphical sign lexicons and the emergence of mathematical

open access: yesReview of Science, Mathematics and ICT Education, 2020
Review of Science, Mathematics and ICT Education, Forthcoming ...
openaire   +2 more sources

Self‐Organized Growth of Catalyst‐Free Single Crystal WnO3n‐2 (n = 25) Nanowire Bundles on Si (111) via Selective He+ Ion Irradiation

open access: yesAdvanced Materials Interfaces, EarlyView.
A novel and efficient method is explored to synthesize 1D single‐crystal sub‐stoichiometric WnO3n‐2 (n = 25) nanowire bundles. The approach utilizes selective low‐energy He+ ion irradiation (27 eV) on Mo‐Ni doped WOx surface, achieving efficient catalyst‐free self‐organized growth of high aspect ratio nanowires at the temperature of 700 °C.
Maryna Bilokur   +3 more
wiley   +1 more source

Signed Rényi Entropy and Quantum Second Laws [PDF]

open access: yesarXiv
We modify the R\'enyi (1961) axioms for entropy to apply to negative (``signed") measures as arise, for example, in phase-space representations of quantum mechanics. We obtain two new measures of (lack of) information about a system -- which we propose as signed analogs to classical Shannon entropy and classical R\'enyi entropy, respectively.
arxiv  

On the Doubly Refined Enumeration of Alternating Sign Matrices and Totally Symmetric Self-Complementary Plane Partitions [PDF]

open access: yesarXiv, 2008
We prove the equality of doubly refined enumerations of Alternating Sign Matrices and of Totally Symmetric Self-Complementary Plane Partitions using integral formulae originating from certain solutions of the quantum Knizhnik--Zamolodchikov equation.
arxiv  

Where are your equal signs? [PDF]

open access: yes, 2017
Paper presented at the 4th Strathmore International Mathematics Conference (SIMC 2017), 19 - 23 June 2017, Strathmore University, Nairobi, Kenya.The equal sign is a critical aspect in mathematics.
Olszewski, Peter, Owiti, Dickson S.O.
core  

Scaled‐Up Graphene Growth Through Chemical Vapor Deposition Over Large‐Area Liquid Cu Catalysts

open access: yesAdvanced Materials Interfaces, EarlyView.
Scaling up the catalyst area fivefold and improving molten catalyst cleaning minimize reactor kinetic effects, enabling reaction kinetics to dominate graphene growth. This results in high‐quality graphene with controlled layering and measurable nucleation rates.
Mahesh K. Prabhu   +9 more
wiley   +1 more source

A formula for the doubly-refined enumeration of alternating sign matrices [PDF]

open access: yesarXiv, 2009
Zeilberger proved the Refined Alternating Sign Matrix Theorem, which gives a product formula, first conjectured by Mills, Robbins and Rumsey, for the number of alternating sign matrices with given top row. Stroganov proved an explicit formula for the number of alternating sign matrices with given top and bottom rows.
arxiv  

Interfacial Yield Stress Response in Synthetic Mucin Solutions

open access: yesAdvanced Materials Interfaces, EarlyView.
The solution rheology of novel synthetic mucins mimicking natural mucin domains is studied. Like many natural mucin solutions, apparent solid‐like rheology is seen. However, no bulk structural features are found to explain it. Interfacial rheology and robust modelling reveal that this arises from molecular associations at the air–water interface ...
Sumit Sunil Kumar   +7 more
wiley   +1 more source

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