Results 51 to 60 of about 69,047 (280)

All-Glass Single-Mode Leakage Channel Microstructured Optical Fibers with Large Mode Area and Low Bending Loss

open access: yesPhotonics, 2023
The paper presents the results of theoretical and experimental studies of all-glass leakage channel microstructured optical fibers (MOFs) with a large mode area and low bending losses. These MOFs contain two layers of fluorine-doped silica glass elements
Alexander Denisov   +6 more
doaj   +1 more source

Molecular dynamics simulations of positively selected codons in FcγRI reveal novel biochemical binding properties

open access: yesFEBS Open Bio, EarlyView.
Evolutionary analysis across 32 placental mammals identified positive selection at residues H148 and W149 in the immune receptor FcγR1. Ancestral reconstruction combined with molecular dynamics simulations reveals how these mutations may influence receptor structure and dynamics, providing insight into the evolution of antibody recognition and immune ...
David A. Young   +7 more
wiley   +1 more source

Isometries of a generalized numerical radius

open access: yes, 2008
For 0 < |q| < 1, the q-numerical range is defined on the algebra Mn of all n x n complex matrices by Wq(A) ={x*Ay : x, y Є Cn , x*x = y*y = 1, x* y = q}. The q-numerical radius is defined by rq(A) = max{|μ| : μ Є Wq(A)}.
Gonçalves, Maria Inez Cardoso
core   +2 more sources

Analytical solution and numerical simulation of the liquid nitrogen freezing-temperature field of a single pipe

open access: yesAIP Advances, 2018
Artificial liquid nitrogen freezing technology is widely used in urban underground engineering due to its technical advantages, such as simple freezing system, high freezing speed, low freezing temperature, high strength of frozen soil, and absence of ...
Haibing Cai   +3 more
doaj   +1 more source

Study on the Instability Mechanism and Grouting Reinforcement Repair of Large-Scale Underground Stopes

open access: yesAdvances in Civil Engineering, 2020
The environmental conditions due to unreasonable mining in underground stopes, the slurry diffusion mechanism in the grouting reinforcement of a stope within its influence, the causes of large-scale instability collapse, and the catastrophic stope ...
Chengyu Xie, Nan Jia, Liwen He
doaj   +1 more source

Laminar Free Convection In Horizontal Annulus Filled With Glass Beads And With Annular Fins On The Inner Cylinder

open access: yesJournal of Engineering, 2023
An experimental and numerical study has been carried out to investigate the heat transfer by natural convection and radiation in a two dimensional annulus enclosure filled with porous media (glass beads) between two horizontal concentric cylinders.
Manal Hadi Saleh, Ahmed Mohsen Katea
doaj   +1 more source

Matrix polynomials with spectral radius equal to the numerical radius

open access: yes, 2011
In this paper we study a class of matrix polynomials with the property that spectral radius and numerical radius coincide.
Wimmer, Harald K., Harald K. Wimmer
core   +1 more source

Numerical radius inequalities of sectorial matrices

open access: yes, 2022
We obtain several upper and lower bounds for the numerical radius of sectorial matrices. We also develop several numerical radius inequalities of the sum, product and commutator of sectorial matrices.
Pintu Bhunia   +5 more
core   +1 more source

Pharmacological inhibition of the PERK pathway modulates hepatocellular carcinoma growth and immune signaling

open access: yesFEBS Open Bio, EarlyView.
Pharmacological inhibition of PERK in a DEN‐induced mouse model of liver cancer does not reduce tumor burden but alters cellular stress signaling. Despite blocking PERK activity, downstream stress responses, including CHOP expression, remain active, suggesting compensatory mechanisms within the unfolded protein response that may influence tumor ...
Ada Lerma‐Clavero   +5 more
wiley   +1 more source

Free Vibration of Partially Supported Cylindrical Shells

open access: yesShock and Vibration, 1995
The effects of detached base length on the natural frequencies and modal shapes of cylindrical shell structures were investigated in this work. Some of the important applications for this type of problem can be found in the cracked fan and rotor blades ...
S. Mirza, Y. Alizadeh
doaj   +1 more source

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