Results 61 to 70 of about 428,876 (333)

Microstructural Evolution and Mechanical Performance of Plasma‐Assisted Hybrid Friction Stir Welded Dissimilar Aluminum–Copper Joints

Advanced Engineering Materials, EarlyView.
Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi, Pankaj Shrivastava, Ganesh Chouhan, Velaphi Msomi   +3 more
wiley   +1 more source

The Cusp–Halo Relation

The Astrophysical Journal
Simulations have established that each halo of collisionless dark matter is expected to contain a ρ  =  Ar ^−1.5 density cusp at its center. This prompt cusp is a relic of the halo’s earliest moments and has a mass comparable to the cutoff scale in the ...
M. Sten Delos
doaj   +1 more source

Bimetallic Nanoparticles as Cocatalysts for Photocatalytic Hydrogen Production

Advanced Functional Materials, EarlyView.
Recent developments have introduced bimetallic nanoparticles as effective cocatalysts for photocatalytic systems. This review explores the rapidly expanding research on bimetallic cocatalysts for photocatalytic production of hydrogen, emphasizing the creation of carrier‐selective contacts, localized surface plasmon resonance effects, methodologies for ...
Yufen Chen, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Jordi Llorca, Lluís Soler   +4 more
wiley   +1 more source

On the Sensitivity of Different Galaxy Properties to Warm Dark Matter

The Astrophysical Journal
We study the impact of warm dark matter (WDM) particle mass on galaxy properties using 1024 state-of-the-art cosmological hydrodynamical simulations from the DREAMS project.
Belén Costanza, Bonny Y. Wang, Francisco Villaescusa-Navarro, Alex M. Garcia, Jonah C. Rose, Mark Vogelsberger, Paul Torrey, Arya Farahi, Xuejian Shen, Ilem Leisher   +9 more
doaj   +1 more source

Cores in warm dark matter haloes: a Catch 22 problem

, 2012
The free streaming of warm dark matter particles dampens the fluctuation spectrum, flattens the mass function of haloes and imprints a fine grained phase density limit for dark matter structures.
Abazajian, Abazajian, Amorisco, Andrea V. Macciò, Aurel Schneider, Ben Moore, Bertschinger, Bode, Bond, Boyarsky, Boyarsky, Boyarsky, Boyarsky, Buchmüller, Colín, Colín, Dalcanton, de Blok, Diemand, Dodelson, Donnino Anderhalden, Dubinski, Flores, Gardini, Governato, Götz, Hansen, Hogan, Jardel, Khlopov, Khlopov, Klypin, Knebe, Knebe, Komatsu, Kuzio, Kuzio de Naray, Macciò, Macciò, Macciò, Macciò, Miranda, Moore, Moore, Oh, Pagels, Peebles, Penarrubia, Polisensky, Romano-Díaz, Salucci, Schmidt, Seljak, Shi, Sinziana Paduroiu, Smith, Springel, Stadel, Strigari, Takayama, Taylor, Tegmark, Tikhonov, Tremaine, Viel, Viel, Villaescusa-Navarro, Waler, Wang, Zavala, Zentner   +70 more
core   +1 more source

21-cm observations and warm dark matter models [PDF]

, 2019
Observations of the redshifted 21-cm signal (in absorption or emission) allow us to peek into the epoch of "dark ages" and the onset of reionization. These data can provide a novel way to learn about the nature of dark matter, in particular about the ...
Boyarsky, Alexey, Iakubovskyi, Dmytro, Ruchayskiy, Oleg, Rudakovskyi, Anton, Valkenburg, Wessel   +4 more
core   +3 more sources

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

New Galaxy UV Luminosity Constraints on Warm Dark Matter from JWST

The Astrophysical Journal
We exploit the recent James Webb Space Telescope (JWST) determination of galaxy UV luminosity functions over the redshift range z = 9–14.5 to derive constraints on warm dark matter (WDM) models. The delayed structure formations in WDM universes make high-
Bin Liu, Huanyuan Shan, Jiajun Zhang
doaj   +1 more source

Warm and fuzzy dark matter: Free streaming of wave dark matter

Physical Review D
Wave or fuzzy dark matter that is produced with relativistic wave numbers exhibits free-streaming effects analogous to warm or hot particle dark matter with relativistic momenta. Axions produced after inflation provide such a warm or mildly relativistic candidate, where the enhanced suppression and observational bounds are only moderately stronger than
Rayne Liu, Wayne Hu, Huangyu Xiao
openaire   +3 more sources

FeDSNP‐Pa Nanoassemblies: A Triple‐Action Therapeutic Strategy Targeting Oxidative Stress, Inflammation, and Pyroptosis for Retinal Ganglion Cell Protection in Glaucoma

Advanced Functional Materials, EarlyView.
FeDSNP‐Pa, a metallized nanoparticle loaded with sodium pyruvate (Pa), exerts triple therapeutic effects by scavenging reactive oxygen species (ROS), suppressing inflammatory responses, and inhibiting pyroptosis signaling pathways. This multifunctional neuroprotective strategy protecting retinal ganglion cells (RGCs) from elevated intraocular pressure ...
Yukun Wu, Xue Li, Tong Wu, Dan Ji, Yugang Bai, Xuezhi Zhou   +5 more
wiley   +1 more source