Results 81 to 90 of about 96,601 (245)

Dielectric relaxation of NKN-BNT porous green body

open access: yesProcedia Engineering, 2012
Abstract0.98Na0.5K0.5NbO3 –0.02Bi0.5Na0.5TiO3 (NKNBNT) nano-powder was fabricated by mechanical alloying method. The NKNBNT particle and water molecular on the particle surface became an insulator/ conductor system because of the surface defect and moisture absorption of Na and K ions.
Liu, Laijun   +4 more
openaire   +1 more source

Convergence of Brownian Motions on Metric Measure Spaces Under Riemannian Curvature-Dimension Conditions

open access: yes, 2019
We show that the pointed measured Gromov convergence of the underlying spaces implies (or under some condition, is equivalent to) the weak convergence of Brownian motions under Riemannian Curvature-Dimension (RCD) conditions.Comment: 39 pages, 3 figures.
Suzuki, Kohei
core   +1 more source

A potential multimodal biomarker – cognitive signature associated with the conversion from subjective cognitive decline to mild cognitive impairment

open access: yesAlzheimer's &Dementia: Translational Research &Clinical Interventions, Volume 12, Issue 2, April/June 2026.
Abstract INTRODUCTION The disruption of key mechanisms involved in amyloid beta (Aβ) clearance during the early stages of dementia may contribute to the progression of cognitive decline toward irreversible brain damage. In this study, we investigated multiple immune‐related pathways implicated in the management and clearance of Aβ within circulating ...
Mohamed Haddad   +5 more
wiley   +1 more source

Dielectric and Mechanical Properties of BNT-LCP Composites

open access: yesJournal of the Korean Institute of Electrical and Electronic Material Engineers, 2011
We investigated the dielectric and mechanical properties of ceramic polymer composite xBNT - (1-x)LCP (x= 0, 10, 20, 30, 40 vol.%). The disk shaped BNT (BaNd2Ti4O12) - LCP (liquid crystal polymer) composite samples were prepared by compression molding method.
Myoung-Sung Park   +4 more
openaire   +1 more source

Models for thin viscous sheets [PDF]

open access: yes, 1996
Leading-order equations governing the dynamics of a two-dimensional thin viscous sheet are derived. The inclusion of inertia effects is found to result in an ill-posed model when the sheet is compressed, and the resulting paradox is resolved by rescaling
Howell, P. D.
core   +1 more source

Next‐Generation Flexible and Wearable Triboelectric Nanogenerator Based on PVDF‐HFP@GCN Composite for Mechanical Energy Scavenging and Sleep Pattern Detection

open access: yesAdvanced Functional Materials, Volume 36, Issue 19, 5 March 2026.
Poly(vinylidene fluoride‐co‐hexafluoropropylene (PVDFHFP)‐graphitic carbon nitride (GCN)/Nylon based flexible and wearable triboelectric nanogenerator (TENG) device was designed. Fabricated PVDF‐HFP@GCN composite film‐based TENG has substantial capability for harvesting mechanical energy, sleep monitoring, and can be used as TENG sensor for smart ...
Gokana Mohana Rani   +4 more
wiley   +1 more source

Adaptive Multicell 3D Beamforming in Multi-Antenna Cellular Networks

open access: yes, 2015
We consider a cellular network with multi-antenna base stations (BSs) and single-antenna users, multicell cooperation, imperfect channel state information, and directional antennas each with a vertically adjustable beam.
Coldrey, Mikael   +3 more
core   +1 more source

Tuning the Phase Structure and Electrical Properties of BNKT‐Based Ceramics via Li+ Doping

open access: yesAdvanced Materials Interfaces, Volume 13, Issue 6, 16 March 2026.
Li+‐doped Bi0.5[Na0.84‐xK0.16Lix]0.5TiO3 lead‐free piezoelectric ceramics are fabricated. The optimized composition delivers a high piezoelectric coefficient d33 and elevated depolarization temperature Td. It also shows large electrostrain and high Curie temperature, greatly extending the working temperature range for BNT‐based piezoelectric ...
Guangzhi Dong   +9 more
wiley   +1 more source

Microwave-Assisted Fabrication and Characterization of Carbon Fiber-Sodium Bismuth Titanate Composites

open access: yesCrystals
Lead-based piezoelectric materials cause many environmental problems, regardless of their exceptional performance. To overcome this issue, a lead-free piezoelectric composite material was developed by incorporating different percentages of carbon fiber ...
Fareeha Azam   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy