Results 101 to 110 of about 106,992 (298)

Resonant Scattering of the He i 1.0833 μm Triplet in H ii Regions: Emission Spectra

The Astrophysical Journal
Resonant scattering of He i 1.0833 μ m triplet photons by metastable He 2 ^3 S _1 is studied for optical depths characteristic of H ii regions. Regions with large He 2 ^3 S _1 column densities are predicted to have unusually broad multipeaked 1.0833 μ m ...
B. T. Draine
doaj   +1 more source

Time-Dependent Behavior of Lyman$\alpha$ Photon Transfer in High Redshift Optically Thick Medium

, 2011
With Monte Carlo simulation method, we investigate the time dependent behavior of Ly$\alpha$ photon transfer in optically thick medium of the concordance $\Lambda$CDM universe.
Adams, Adams, Becker, Bonilha, Dijkstra, Dijkstra, Fan, Feng, Field, Field, Harrington, Hayes, Henyey, Higgins, Hummer, Hummer, Laursen, Lehnert, Li-Zhi Fang, Liu, Loeb, Lu, Miralda Escude, Neufeld, Osterbrock, Pierleoni, Roy, Roy, Roy, Roy, Rybicki, Rybicki, Salvaterra, Shapiro, Spitzer, Tasitsiomi, Totani, Unno, Verhamme, Wen Xu, Wouthuysen, Xiang-Ping Wu, Xu, Zheng, Zhu, Zhu   +45 more
core   +1 more source

Gas column resonance analysis of reciprocating compressor

Journal of Physics: Conference Series, 2020
Abstract The oscillation process based on acoustic vibration system and electrical circuit can be described by the same type of differential equation. MATLAB/SIMULINK was used to establish the electrical model of the outlet piping system of the 2D-90Mg-2.5/1.5 type air combined compressor in the laborator.
openaire   +1 more source

Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance

Advanced Functional Materials, EarlyView.
A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer, Emilia Fulajtar, Seema Agarwal   +2 more
wiley   +1 more source

Bioinspired Stabilization of Fluorescent Au@SiO2 Tracers for Multimodal Biological Imaging

Advanced Functional Materials, EarlyView.
This study demonstrates a bioinspired stabilization strategy for fluorescent gold‐silica nanoparticles. Inspired by natural biosilica maturation, high‐temperature calcination transforms the silica shells, preventing dissolution in cell culture media and intracellular environments.
Wang Sik Lee, Henry Lee, Patricia Taladriz‐Blanco, Dimitri Vanhecke, Barbara Rothen‐Rutishauser, Alke Petri‐Fink   +5 more
wiley   +1 more source

Empirical calibration of Na I D and other absorption lines as tracers of high-redshift neutral outflows

Astronomy & Astrophysics
Recent JWST observations of massive galaxies at z > 2 detect blueshifted absorption in Na I D and other resonant absorption lines, indicative of strong gas outflows in the neutral phase.
Moretti Lorenzo, Belli Sirio, Rudie Gwen C., Newman Andrew B., Park Minjung, Khoram Amir H., Chartab Nima, Donevski Darko   +7 more
doaj   +1 more source

Stability Properties of Strongly Magnetized Spine Sheath Relativistic Jets

, 2007
The linearized relativistic magnetohydrodynamic (RMHD) equations describing a uniform axially magnetized cylindrical relativistic jet spine embedded in a uniform axially magnetized relativistically moving sheath are derived.
Birkinshaw M., Blandford R. D., Blandford R. D., Blandford R. D., Istomin Y. N., Istomin Y. N., Lery T., Philip E. Hardee, Sol H., Steffen W.   +9 more
core   +1 more source

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source

Harnessing the Orientation of Columnar Discotic Liquid Crystals for Narrowband Blue Emission with Enhanced Out‐Coupling Efficiency Toward Improvement of SP‐OLEDs Performance

Advanced Functional Materials, EarlyView.
Solution‐processed OLEDs containing discotic liquid‐crystalline MR‐TADF emitters are reported. Supramolecular self‐assembly induces homeotropic columnar alignment, enforcing preferential horizontal orientation of the emitter transition dipole moment in spin‐coated films, which leads to an enhancement in the device light outcoupling efficiency while ...
Joydip De, Abhishek Kumar Gupta, Džiugas Litvinas, Francisco Tenopala‐Carmona, Matthias Lehmann, Malte C. Gather, Eli Zysman‐Colman   +6 more
wiley   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source