Results 51 to 60 of about 12,947 (248)

Principal eigenvalues for indefinite-weight elliptic problems in 𝑅ⁿ [PDF]

Proceedings of the American Mathematical Society, 1992
We consider the problem − Δ u = λ g u - \Delta u = \lambda gu in R n {R^n} , u → 0 u \to 0 at ∞ \infty with g g a function that changes sign.
openaire   +1 more source

Ultrasound‐Guided Liposomal vs. Conventional Bupivacaine Erector Spinae Plane Block Plus Gabapentin for Postherpetic Neuralgia

The Kaohsiung Journal of Medical Sciences, EarlyView.
ABSTRACT This study aimed to compare efficacy and safety of ultrasound‐guided erector spinae plane block (ESPB) using liposomal (LB) versus conventional bupivacaine (CB), each plus standardized gabapentin, in patients with postherpetic neuralgia (PHN). A total of 116 PHN patients were randomized to ESPB‐LB or ESPB‐CB; both groups received standardized ...
Xia‐Jing Xu, Li‐Juan Liu, Fa‐Ming Xu, Xiang‐Yu Fang   +3 more
wiley   +1 more source

A global bifurcation result of a Neumann problem with indefinite weight

Electronic Journal of Qualitative Theory of Differential Equations, 2004
This paper is concerned with the bifurcation result of nonlinear Neumann problem \begin{equation} \left\{\begin{array}{lll} -\Delta_p u=& \lambda m(x)|u|^{p-2}u + f(\lambda,x,u)& \mbox{in} \ \Omega\\ \frac{\partial u}{\partial \nu}\hspace{0.55cm}= & 0 &
Abdelouahed El Khalil, M. Ouanan
doaj   +1 more source

Photonic Systolic Array for All‐Optical Matrix–Matrix Multiplication

Laser &Photonics Reviews, EarlyView.
A photonic systolic array is introduced, offering extreme parallelism in matrix‐matrix multiplication based on the synchronized movement of optical pulses along a crossbar array. Optical pulses traveling in perpendicular directions meet at freeform‐designed multiply‐accumulate units, each tailored to generate two signals whose intensity difference ...
Jungmin Kim, Qingyi Zhou, Zongfu Yu
wiley   +1 more source

A Low‐Cost and Compact High‐Frequency Gallium Nitride Gradient Power Amplifier for Low‐Field MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To reduce the upfront cost of small, low‐field MRI systems, while expanding the capabilities of their gradient systems. Methods A gradient power amplifier was designed to leverage the lowering cost of Gallium Nitride (GaN) power transistors and high speed logic, to achieve high efficiency and responsiveness for driving gradient coils ...
N. Reid Bolding, Jacob Hannan, Christopher Vaughn, Aria Patel, Snow Lin, Jessie E. P. Sun, William Grissom, Mark A. Griswold   +7 more
wiley   +1 more source

Interfacial Chemistry Behind Damage Monitoring in Glass Fiber‐Reinforced Composites: Attempts and Perspectives

Polymer Composites, EarlyView.
Role of the modifications at the interface in glass fiber reinforced composites for damage monitoring. ABSTRACT Glass Fiber Reinforced Polymers (GFRPs) are widely used in structural applications but degrade over time due to internal damage. Structural Health Monitoring (SHM) enables early damage detection, improving reliability and reducing maintenance
Marta Colombo, Silvia Mostoni, Giulia Fredi, Carol Rodricks, Gerhard Kalinka, Massimiliano Riva, Andrea Vassallo, Barbara Di Credico, Roberto Scotti, Michele Zappalorto, Massimiliano D'Arienzo   +10 more
wiley   +1 more source

Characteristics, properties and limitations of per‐ or polyfluoroalkyl substances (PFASs) and fluoropolymers

Polymer International, EarlyView.
An overview and categorization of man‐made per‐ or polyfluoroalkyl substances (PFASs) including low‐molar‐mass and high‐molar‐mass fluorochemicals, and their international regulations is presented. Though certain PFASs are toxic, bioaccumulative and cross the human cellular membranes, others, such as fluoropolymers, are safe, reliable and involved in ...
Bruno Améduri
wiley   +1 more source

White‐Light Flexible Crystal With 180° Folding Induced by Halogen‐Bond Network in Organic‐Inorganic Hybrid Perovskite

Rare Metals, EarlyView.
ABSTRACT Organic‐inorganic hybrid perovskites (OIHPs) with white‐light emission have significant potential in solid‐state lighting and display due to the designable structure and excellent luminescent properties. However, OIHPs are prone to damage during bending due to the brittleness of crystals, which limits their application in the field of flexible
Jinyu Xu, Yuelun Fu, Liwen Kang, Yuxuan You, Qiangqiang Chai, Junyan Wu, Shuaiqi Wang, Kuanguan Liu, Zhenghuan Lin   +8 more
wiley   +1 more source

On a class of fractional \(p(x,y)-\)Kirchhoff type problems with indefinite weight

Cubo
This paper is concerned with a class of fractional \(p(x,y)-\)Kirchhoff type problems with Dirichlet boundary data along with indefinite weight of the following form \begin{equation*} \left\lbrace\begin{array}{ll} M\left(\int_{Q}\frac{1}{p(x,y)}\frac{|
Seyed Mostafa Sajjadi, Ghasem Alizadeh Afrouzi   +1 more
doaj   +1 more source

Non-real eigenvalues of symmetric Sturm–Liouville problems with indefinite weight functions

Electronic Journal of Qualitative Theory of Differential Equations, 2017
The present paper deals with non-real eigenvalues of regular Sturm–Liouville problems with odd symmetry indefinite weight functions applying the two-parameter method.
Bing Xie, huaqing Sun, Xinwei Guo
doaj   +1 more source