Results 51 to 60 of about 1,128,497 (345)

Numerical simulations of conversion to Alfven waves in sunspots

, 2011
We study the conversion of fast magneto-acoustic waves to Alfven waves by means of 2.5D numerical simulations in a sunspot-like magnetic configuration. A fast, essentially acoustic, wave of a given frequency and wave number is generated below the surface
Avrett, Bellot Rubio, Cally, Cally, Cally, Cavallini, Centeno, Centeno, Centeno, Collados, Cranmer, E. Khomenko, Felipe, Felipe, Felipe, Fujimura, Hansen, Jefferies, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Manso Sainz, Mihalas, Norton, P. S. Cally, Parchevsky, Priest, Socas-Navarro, Socas-Navarro, Trujillo Bueno, Van Doorsselaere, Zhugzhda, Štěpán   +36 more
core   +1 more source

Generation of continuous-wave THz radiation by use of quantum interference [PDF]

, 1999
We propose a scheme for generation of continuous-wave THz radiation. The scheme requires a medium where three discrete states in a $\Lambda $ configuration can be selected, with the THz-frequency transition between the two lower metastable states.
Armstrong, Brandt, Buckle, D. V. Kosachiov, E. A. Korsunsky, Godone, Harris, Harris, Jain, Korsunsky, Kosachiov, Kosachiov, Merriam, Strumia, Xu   +14 more
core   +2 more sources

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Gravitational waves from stochastic relativistic sources: primordial turbulence and magnetic fields

, 2006
The power spectrum of a homogeneous and isotropic stochastic variable, characterized by a finite correlation length, does in general not vanish on scales larger than the correlation scale. If the variable is a divergence free vector field, we demonstrate
A. Linde, Chiara Caprini, J. O. Hinze, L. D. Landau, P. A. Davidson, Ruth Durrer, S. Weinberg   +6 more
core   +2 more sources

Ketogenic Diet as an Epigenetic Therapy in SETD1B‐Related Epilepsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Histone lysine methyltransferases such as SETD1B regulate chromatin structure and gene transcription. Ketone bodies, including butyrate, act as histone deacetylase inhibitors. We report a 4‐year‐old boy with SETD1B‐related absence epilepsy, refractory to conventional medications, who achieved sustained > 90% seizure reduction on the Modified ...
Erica Tsang, Brian S. Gloss, Jessica P. Hayes, Andrew J. A. Holland, Manoj P. Menezes, Joceline A. Branson, Shekeeb S. Mohammad, Jingya J. Yan, Shrujna Patel, Velda X. Han, Russell C. Dale   +10 more
wiley   +1 more source

Fast northward energy transfer in the Atlantic due to Agulhas rings [PDF]

, 2007
The adiabatic transit time of wave energy radiated by an Agulhas ring released in the South Atlantic Ocean to the North Atlantic Ocean is investigated in a two-layer ocean model.
Anderson, Andersson, Barnier, Beismann, Boebel, Broecker, Bryden, Cessi, Clark, De Ruijter, De Ruijter, De Steur, Drijfhout, Erik van Sebille, Ganachaud, Gordon, Johnson, Johnson, Kamenkovitch, Knorr, Kowalik, Liu, Longuet-Higgins, Lutjeharms, Mesinger, Nof, Peeters, Peter Jan van Leeuwen, Primeau, Rahmstorf, Rahmstorf, Saenko, Schmitz, Schouten, Tailleux, Tailleux, Tang, Van Aken, Wang, Weijer, Weijer   +40 more
core   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Aerodynamic Performance Analysis of Trailing Edge Serrations on a Wells Turbine

Energies, 2022
The primary objective of this investigation was to explore the aerodynamic impact of adding trailing edge serrations to a Wells turbine. The baseline turbine consists of eight NACA 0015 blades. The blade chord length was 0.125 m and the span was 0.100 m.
Abdullah Saad Alkhalifa, Mohammad Nasim Uddin, Michael Atkinson   +2 more
doaj   +1 more source

Recent Progress in Electrical Generators for Oceanic Wave Energy Conversion

IEEE Access, 2020
Oceanic wave energy extraction through electrical generator is one of the most interesting topics in the field of power engineering. Almost all the existing relevant review paper focus on electrical generator with the working principle of electromagnetic
Abidur Rahman, Omar Farrok, Md. Rabiul Islam, W. Xu   +3 more
semanticscholar   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source