Results 131 to 140 of about 319,282 (323)

On the origin of microturbulence in hot stars

open access: yes, 2008
We present results from the first extensive study of convection zones in the envelopes of hot massive stars, which are caused by opacity peaks associated with iron and helium ionization.
Brott, I.   +7 more
core  

Rapid Sintering of Porous Organic Polymer Powders Into Mechanically Strong Monoliths for Efficient CO2 Capture

open access: yesAdvanced Functional Materials, EarlyView.
Spark plasma sintering enables rapid processing of porous organic polymer (POP) from fine powders to a freestanding and mechanically robust monolith. The sintering process retains the CO2 adsorption capacity and CO2/N2 selectivity, making the monolith more suitable as a solid sorbent for practical carbon capture applications.
Duan Li   +4 more
wiley   +1 more source

Massive Stars and Galactic Evolution [PDF]

open access: yesSymposium - International Astronomical Union, 1991
The evolution and nucleosynthesis in massive stars are briefly reviewed, and compared with the information derived from SN1987A in LMC. Most of the theoretical models agree with the measured abundances and they can be used in models of galactic evolution.Models of chemical evolution of galaxies are presented and the role of massive stars in their ...
openaire   +1 more source

Reconfigurable Metamirrors Based on Compliant Mechanisms

open access: yesAdvanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy   +3 more
wiley   +1 more source

Pulsating massive stars

open access: yesAstronomy & Geophysics
Abstract Asteroseismologist Dominic Bowman has made a career out of reading the rhythms and music of the stars. So what instruments make up the stellar symphony?
openaire   +2 more sources

Stellar models and isochrones from low-mass to massive stars including pre-main sequence phase with accretion [PDF]

open access: green, 2019
L. Haemmerlé   +8 more
openalex   +1 more source

Complementary Logic Driven by Dielectrophoretic Assembly of 2D Semiconductors

open access: yesAdvanced Functional Materials, EarlyView.
Scalable, parallel fabrication of complementary logic gates is demonstrated using electric‐field‐driven deterministic assembly of electrochemically exfoliated 2D n‐type MoS2 and p‐type WSe2 nanosheets. This strategy yields MoS2 and WSe2 transistors featuring average mobilities of 4.3 and 3.0 cm2 V−1 s−1, respectively, and on/off ratios of > 104 ...
Dongjoon Rhee   +10 more
wiley   +1 more source

Stellar Winds from Massive Stars [PDF]

open access: yes, 2001
16 pages, 2 figures, Review paper to appear in Proc `The influence of binaries on stellar population studies', Brussels, Aug 2000 (D.
openaire   +2 more sources

Golden‐Ratio–Guided Aperiodic Architected Metamaterials with Simultaneously Enhanced Strength and Toughness

open access: yesAdvanced Functional Materials, EarlyView.
Guided by the golden ratio, a class of aperiodic architected metamaterials is introduced to address the intrinsic trade‐off between strength and toughness. By unifying local geometric heterogeneity with global order, the golden‐ratio‐guided aperiodic architecture promotes spatial delocalization of damage tolerence regions, leading to more tortuous ...
Junjie Deng   +9 more
wiley   +1 more source

The ultraviolet signature of massive stars in starburst galaxies [PDF]

open access: yes
Studies in different spectral regimes of starburst galaxies clearly indicate the presence of hot, massive stars. However, only the UV spectral region can be used to directly identify the spectroscopic signature of these stars.
Carmelle, Robert   +2 more
core   +1 more source

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