Results 91 to 100 of about 1,689,762 (301)

A Miniaturized Autonomous Thermomagnetic Generator

open access: yesAdvanced Functional Materials, EarlyView.
Micro, autonomous and high power thermomagnetic generator operating between a heat dissipator and a processor. ABSTRACT Thermomagnetic generators (TMG) are promising devices for converting low‐grade waste heat into electricity. Self‐actuation using permanent magnets is the key to autonomy.
Morgan Almanza   +11 more
wiley   +1 more source

Global nonlinear stability and "cold convection instability" of non-constant porous throughflows, 2D in vertical planes

open access: yes, 2015
Porous horizontal layers are considered. A class of non-constant porous throughflows, 2D in vertical planes, is obtained.
DE LUCA, ROBERTA
core   +1 more source

APTES‐Mediated Ti‐Squarate MOF/n‐GaN Nanowire Photoanodes for Efficient Photoelectrochemical Water Splitting

open access: yesAdvanced Functional Materials, EarlyView.
The APTES linker establishes a permanent interfacial dipole, reducing the work function of n‐GaN from 3.55 to 3.29 eV. This strengthens the built‐in electric field, significantly accelerating hole extraction to drive the oxygen evolution reaction (OER). Ultimately, this tailored charge‐separation architecture achieves a remarkable 4.78‐fold enhancement
Jeong‐Kyun Oh   +15 more
wiley   +1 more source

Model Design and Application for Excavation Face Stability in Upward Shield Tunneling

open access: yesBuildings
The emerging upward shield method (USM) for constructing vertical shafts has been used in various projects, including the Midosuji utility tunnel in Japan.
Xiao Wang   +6 more
doaj   +1 more source

Vortices and the saturation of the vertical shear instability in protoplanetary discs [PDF]

open access: yes, 2018
If sufficiently irradiated by its central star, a protoplanetary disc falls into an equilibrium state exhibiting vertical shear. This state may be subject to a hydrodynamical instability, the ‘vertical shear instability’ (VSI), whose breakdown into ...

core   +2 more sources

Bistable Isochoric Chiral Metamaterials with Reprogrammable Multiaxial Responses

open access: yesAdvanced Functional Materials, EarlyView.
An isochoric bistable rotational unit cell enables in situ modification of internal contact conditions post‐fabrication, without altering the global envelope dimensions of the surrounding architecture. By selectively switching between open and closed states, the tessellated chiral metamaterial can reprogram its volumetric response, including bulk ...
Shujia Chen   +3 more
wiley   +1 more source

The Triggering Mechanisms of a Short-Duration Local Heavy Rainstorm Event in the Tarim Basin, China

open access: yesAdvances in Meteorology
The Tarim basin located in the western northwest China is the largest inland basin in the world and the core component of the arid region of the Central Asia.
Man Li, Chenxiang Ju, Xia Yang
doaj   +1 more source

Experimental determination of the vertical instability strength in PDX tokamak [PDF]

open access: yes, 1982
The instability strength of a diverted plasma with vertical elongation is measured for a range of the magnetic field decay index, -1.5 < n < +0.5, in the standard-D and inverted-D configurations.
K. Bol   +9 more
core   +1 more source

Exceptional Electro‐Optic Coefficient Unlocked via Polarization Swaying in KNbO3 Thin Films

open access: yesAdvanced Functional Materials, EarlyView.
We present the largest reported electro‐optic response in any material to date, guided by a new design principle that exploits ultralow coercive field polarization swaying enabled by low‐symmetry ferroelectric phases in monoclinic KNbO3 thin films for energy‐efficient classical and quantum photonic integrated circuits. ABSTRACT The electro‐optic effect
Sankalpa Hazra   +11 more
wiley   +1 more source

How to Overcome Numerical Instability when the Density Jump Between Layers is Constant

open access: yesBrazilian Journal of Geophysics, 1989
It has been observed in oceanic modelling that numerical instability is causedwhen the density jump between layers is constant. This instability is usuallyovercome by using variable density jumps, according to McNider & O'Brien(1973).
Alejandro Livio Camerlengo
doaj   +1 more source

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