Results 121 to 130 of about 21,739 (292)
Advanced Materials, EarlyView.A multifunctional bioactive PEEK‐based implant (Mn@p/MBG‐SPEEK) is engineered to combat implant‐associated infections while promoting osteogenesis. The hybrid surface activates PI3K/Akt/mTOR and AP‐1 signaling pathways for osteogenic differentiation, while Mn coordination induces electronic coupling that narrows the HOMO‐LUMO energy gap and enhances ...
Zhiyan Xu +7 more
wiley +1 more source
Intermediate-mass Black Holes in Dwarf Galaxies [PDF]
, 2019 Supermassive black holes are the central engines of active galactic nuclei (AGN) and are thought to lie at the heart of many massive galaxies. It is currently uncertain, however, whether AGN exist in low-mass dwarf galaxies, and if they do, whether they ...
Musaeva, Ayna
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The Astrophysical JournalWe derive models of rotating very massive stellar cores with mass ≈10 ^2 –10 ^4 M _⊙ that are marginally stable to the pair-unstable collapse, assuming that the core is isentropic and composed primarily of oxygen.
Masaru Shibata, Sho Fujibayashi
doaj +1 more source
Entropy of Intermediate-Mass Black Holes
, 2009 Observational searches for Intermediate-Mass Black Holes (IMBHs), defined to have masses between 30 and 300,000 solar masses, provide limits which allow up to ten percent of what is presently identified as halo dark matter to be in the form of IMBHs.
openaire +2 more sources
Advanced Materials, EarlyView.Field‐programmed anisotropy imparts material‐level intelligence to soft composites. Magnetic torque dynamics drive magneto‐piezoelectric nanowires from random dispersion into deterministic axial alignment. The resulting hierarchical percolation networks confine electromechanical coupling to specific axes and intrinsically decouple superposed force ...
Yubin Kim +9 more
wiley +1 more source
Geometry of black holes and braneworlds in higher dimensions [PDF]
, 2004 This tliesis first discusses braneworld models, we explain how the bulk geometry in codimension 2 scenarios restricts braneworld fields in a way inconsistent with observation.
Paul B. Bostock +2 more
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Enhanced Extreme Mass Ratio Inspiral Rates into Intermediate Mass Black Holes [PDF]
, 2023 Extreme mass ratio inspirals (EMRIs) occur when stellar-mass compact objects begin a gravitational wave (GW) driven inspiral into massive black holes. EMRI waveforms can precisely map the surrounding spacetime, making them a key target for future space ...
Qunbar, Ismail, Stone, Nicholas C.
core +1 more source
The Astrophysical JournalThe surface brightness profiles of globular clusters are conventionally described with the well-known King profile. However, observations of young massive clusters (YMCs) in the local Universe suggest that they are better fit by simple models with flat ...
Kuldeep Sharma, Carl L. Rodriguez
doaj +1 more source
Advanced Materials, EarlyView.Selective methane (CH4) photooxidation emerges from architectural decoupling of activation and preservation. Programmable organic semiconductor frameworks spatially organize oxidative flux and intermediate residence, separating reaction zones from product domains to synchronize activation strength with stabilization and establish a selective oxidation ...
Minxian Zhang +5 more
wiley +1 more source
The Black Hole Spin Controversy [PDF]
, 2012 Astrophysical black holes are the simplest possible objects. They are completely described by only two parameters in general relativity, their mass and the specific angular momentum, spin.
KOLEHMAINEN, MARI,JOHANNA +1 more
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