Results 131 to 140 of about 68,019 (304)

The dispute about infinity

open access: yes, 2020
summary:Článek pojednává o sporu dvou významných osobností – francouzského matematika, fyzika a filosofa Henriho Poincarého a německého matematika a logika Georga Cantora.
Bušková, Petra
core  

One‐Dimensional Materials Supported in Two‐Dimensional Van der Waals Metal–Organic Frameworks with Optical Anisotropy Switching via Twist‐Engineering

open access: yesAdvanced Materials, EarlyView.
We introduce a molecular strategy to assemble one‐dimensional (1D) materials into two‐dimensional (2D) van der Waals metal–organic frameworks (MOFs). Crystals of [FeX(pzX)(bpy)] (X = Cl, F) form anisotropic 2D layers that can be mechanically exfoliated into thin sheets.
Eleni C. Mazarakioti   +12 more
wiley   +1 more source

LEAD: Literature Enhanced Ab Initio Discovery of Nitride Dusting Layers for Enhanced Tunnel Magnetoresistance and Lower Resistance Magnetic Tunnel Junctions

open access: yesAdvanced Materials, EarlyView.
Magnetic tunnel junctions (MTJs) using MgO tunnel barriers face challenges of high resistance‐area product and low tunnel magnetoresistance (TMR). To discover alternative materials, Literature Enhanced Ab initio Discovery (LEAD) is developed. The LEAD‐predicted materials are theoretically evaluated, showing that MTJs with dusting of ScN or TiN on ...
Sabiq Islam   +6 more
wiley   +1 more source

Leveraging Earth Flyby Using E-sail with Attitude Constraints

open access: yesGuidance, Navigation and Control
The use of a single gravity assist maneuver can reduce the amount of velocity change required from a conventional spacecraft thruster to carry out complex interplanetary missions. In this context, the technique known as the V-infinity leveraging maneuver
Alessandro A. Quarta
doaj   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

open access: yesAdvanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief   +12 more
wiley   +1 more source

The INFINITY learning model in Thailand: its potential for developing countries

open access: yes, 2012
Online learning models are acknowledged to be key delivery systems in higher education because of their potential for lifelong learning initiatives.
Poonsri Vate-U-Lan
core  

Inverse Design of Amorphous Materials With Targeted Properties

open access: yesAdvanced Materials, EarlyView.
AMDEN is a diffusion model framework for the inverse design of amorphous materials with targeted properties. By incorporating Hamiltonian Monte Carlo refinement into the denoising process, the framework overcomes the challenge of generating thermally relaxed disordered structures.
Jonas A. Finkler   +4 more
wiley   +1 more source

"INFINITY CAN NEVER BE EXPRESSED, SHOWN, DRAWN, OR PICTURED!": PRIMARY SCHOOL STUDENTS' PERCEPTIONS AND MISCONCEPTIONS OF INFINITY [PDF]

open access: yes, 2012
Sonsuzluk, gerçek ve potansiyel sonsuzluk olmak üzere ikiye ayrılmaktadır. Eski zamanlardan beri, potansiyel sonsuzluğun matematiksel sonsuzluk olduğu kabul edilmektedir. Sayı kümeleri ise, matematiksel sonsuzluğu içeren kavramların başında gelir.
NARLI, SERKAN, Narlı, Pınar
core  

Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells

open access: yesAdvanced Materials, EarlyView.
Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang   +14 more
wiley   +1 more source

Switchable Magnonic Crystals Based on Spin Crossover/CrSBr Heterostructures

open access: yesAdvanced Materials, EarlyView.
Multiscale modeling is employed to investigate the functionality of a light‐controlled, tunable magnonic crystal based on spin‐crossover Fe‐pz molecules integrated with a monolayer of CrSBr. Ab initio simulations confirm that the molecules remain functional on the CrSBr surface, while a semiclassical elastic model demonstrates that light‐induced ...
Andrei Shumilin   +4 more
wiley   +1 more source

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