Results 21 to 30 of about 567,556 (268)

Observation of Van Hove Singularities and Temperature Dependence of Electrical Characteristics in Suspended Carbon Nanotube Schottky Barrier Transistors

open access: yesNano-Micro Letters, 2017
A Van Hove singularity (VHS) is a singularity in the phonon or electronic density of states of a crystalline solid. When the Fermi energy is close to the VHS, instabilities will occur, which can give rise to new phases of matter with desirable properties.
Jian Zhang   +9 more
doaj   +1 more source

Research Progress on the Synthesis of Nanosized and Hierarchical Beta Zeolites

open access: yesInorganics, 2023
Beta zeolite, a crystal material with a three-dimensional twelve-ring cross-channel structure, has many advantages, such as high Brønsted acid concentration, high Si/Al ratio, thermal/hydrothermal stability, and large surface area.
Luwei Hong   +5 more
doaj   +1 more source

Bioinspired Tough and Strong Fibers with Hierarchical Core–Shell Structure

open access: yesAdvanced Materials Interfaces, 2023
Strong and tough bio‐based fibers are attractive for both fundamental research and practical applications. In this work, strong and tough hierarchical core–shell fibers with cellulose nanofibrils (CNFs) in the core and regenerated silk fibroins (RSFs) in
Yao Xiao   +8 more
doaj   +1 more source

Finding Hierarchical Structures of Disordered Systems: An Application for Market Basket Analysis

open access: yesIEEE Access, 2021
Complex systems can be characterized by their level of order or disorder. An ordered system is related to the presence of system properties that are correlated with each other.
Mauricio A. Valle, Gonzalo A. Ruz
doaj   +1 more source

Serbian adaptation of the positive and negative affect schedule (PANAS): Its facets and second-order structure [PDF]

open access: yesPsihologija, 2014
Although the PANAS is widely used in affect research there are some controversies regarding its structure. Two related studies were reported providing evidence that a Serbian adaptation of the PANAS represents a valid and reliable measure of ...
Mihić Ljiljana   +3 more
doaj   +1 more source

Macroscopic helical chirality and self-motion of hierarchical self-assemblies induced by enantiomeric small molecules

open access: yesNature Communications, 2018
Chirality transfer by chemical self-assembly has been studied intensively for years but chirality transfers along the same path remains elusive. Here the authors use a multiscale chemo-mechanical model to elucidate the mechanism underlying the chirality ...
Yang Yang   +10 more
doaj   +1 more source

Uncovering the different scales in deer–forest interactions

open access: yesEcology and Evolution, 2021
Deer are regarded to be a keystone species as they play a crucial role in the way an ecosystem functions. Most deer–forest interaction studies apply a single scale — process of analyzing ecological interactions by only taking into account one dependent ...
Juan Ignacio Ramirez
doaj   +1 more source

Hierarchical Zeolites as Catalysts for Biodiesel Production from Waste Frying Oils to Overcome Mass Transfer Limitations

open access: yesMolecules, 2021
Hierarchical crystals with short diffusion path, conventional microcrystals and nanocrystals of ZSM-5 zeolites were used for biodiesel production from waste frying oils and were assessed for their catalytic activity in regard to their pore structure and ...
Elyssa G. Fawaz   +3 more
doaj   +1 more source

Enhanced Activity of Hierarchical Nanostructural Birnessite-MnO2-Based Materials Deposited onto Nickel Foam for Efficient Supercapacitor Electrodes

open access: yesNanomaterials, 2020
Hierarchical porous birnessite-MnO2-based nanostructure composite materials were prepared on a nickel foam substrate by a successive ionic layer adsorption and reaction method (SILAR). Following composition with reduced graphene oxide (rGO) and multiwall
Shang-Chao Hung   +4 more
doaj   +1 more source

Multi-Objective Hierarchical Optimization: A Design Framework for Grid-Connected Interleaved H-Bridges

open access: yesIEEE Open Journal of the Industrial Electronics Society, 2021
The paralleling of power converters connected to the grid for power-sharing is a widely used technique. In this context, the design framework for a low-cost, lightweight, compact and high-performance optimum configuration is an open problem.
Rama Krishna Naidu Vaddipalli   +1 more
doaj   +1 more source

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