Results 61 to 70 of about 11,494 (215)

Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations

open access: yesAstronomy & Astrophysics
We investigate the presence and spatial characteristics of the jet base emission in M87* at 230 GHz, enabled by the significantly enhanced (u,v) coverage in the 2021 Event Horizon Telescope (EHT) observations.
Saurabh   +284 more
doaj   +1 more source

Microsphere‐Templated Conductive Syntactic Foams for Recyclable and Additively Manufactured Soft Electronics

open access: yesAdvanced Healthcare Materials, EarlyView.
This work introduces a microsphere‐templated strategy to fabricate reprocessable PEDOT:PSS syntactic foams with tunable porosity, stable conductivity, and 3D printability. In situ PEDOT:PSS coatings create a conductive network that maintains electrical performance at high void fractions.
Gayaneh Petrossian   +7 more
wiley   +1 more source

The gas streamer G1–2–3 in the Galactic center

open access: yesAstronomy & Astrophysics
The black hole in the Galactic center, Sgr A*, is prototypical of ultra-low-fed galactic nuclei. The discovery of a handful of gas clumps with masses on the order of a few Earth masses in its immediate vicinity provides a gas reservoir sufficient to ...
Gillessen S.   +63 more
doaj   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

open access: yesAdvanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen   +5 more
wiley   +1 more source

Teoria quântica da gravitação: cordas e teoria M

open access: yesRevista Brasileira de Ensino de Física
Discutimos aqui a junção da relatividade geral e da mecânica quântica como necessidade tanto teórica quanto experimental da Física, e suas conseqüências na compreensão do Universo, de seu início e sua evolução.
Elcio Abdalla
doaj   +1 more source

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

open access: yesAdvanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia   +3 more
wiley   +1 more source

Equilibrium figure of Haumea and possible detection via stellar occultation

open access: yesAstronomy & Astrophysics
We studied the equilibrium figure of dwarf planet Haumea to determine if the observed shape is compatible with a differentiated hydrostatic body. Three groups of interior models of Haumea were assumed, all with a rocky core and a volatile-rich outer ...
Staelen C.   +3 more
doaj   +1 more source

Positively Charged Polymer‐Brush MOFs for Large‐Area, Pressure‐Resistant Gas Separation Membranes

open access: yesAdvanced Materials, EarlyView.
A universal POPA strategy enables positively charged polymer‐brush MOFs with self‐adaptive interfacial interlocking to resist aggregation under fast processing. This design ensures seamless dispersion within large‐area selective layers, achieving 1 m‐wide roll‐to‐roll fabrication of pressure‐resistant MMCMs with tunable CO2 separation performance ...
Yi Yang   +11 more
wiley   +1 more source

Retrospective Analysis of Pulse Wave Flattening for G-LOC Detection Using Automatic Computer Algorithm Methods

open access: yesAerospace
The possibility of G-induced loss of consciousness (G-LOC) is a key concern when flying modern, high-performance aircraft. Currently, there are no identification methods available based on physiological data.
Janina Sammito   +3 more
doaj   +1 more source

Dynamics and Formation of Obscuring Tori in AGNs

open access: yesFrontiers in Astronomy and Space Sciences, 2017
We considered the evolution of a self-gravitating clumpy torus in the gravitational field of the central mass of an active galactic nucleus (AGN) in the framework of the N-body problem.
Elena Yu. Bannikova   +3 more
doaj   +1 more source

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