Results 91 to 100 of about 233,694 (299)

Porous Bi2S3 Bulk With Excellent Thermoelectric Performance by Solid States Replacement and Low Melting‐Point Metal Volatilization

open access: yesAdvanced Materials, EarlyView.
By introducing FeCoNi medium‐entropy alloy, the bismuth sulfide (Bi2S3) material achieves a record‐high ZT of 1.1 at 773 K, owing to the solid‐states replacement reaction and the volatilization of low melting‐point metal. This strategy is also applicable to other sulfur‐based thermoelectric materials.
Zi‐Yuan Wang   +9 more
wiley   +1 more source

The Sublime and the Cute in Bong Joon Ho’s Ecocinema

open access: yesInternational Journal of Communication
From the television series Planet Earth to documentary jeremiads like An Inconvenient Truth, viewers are inundated with sublime images of nature that overwhelm them with feelings of awe.
LeiLani Nishime
doaj   +2 more sources

BIOLOGY: WHAT ONE NEEDS TO KNOW

open access: yesZygon, 1996
. Biology on this planet represents an astonishing experiment in carbon‐based chemistry which, over billions of years, has generated billions of species adapted to countless major and minor fluctuations in ecological circumstances. In one sense there is
doaj   +2 more sources

Scalable, Bottom‐Up Synthesis of Transition Metal–Doped Quantum Confined, 1D Titanate‐Based Lepidocrocite Nanofilaments, Their Electronic Structures and Oxygen Evolution Reactivity

open access: yesAdvanced Materials Interfaces, EarlyView.
Quantum‐confined lepidocrocite titanate nanofilaments are doped, bottom‐up, with Mn+2, Fe+2, Co+2, Ni+2, and Cu+2 to tune electronic structure and catalysis. Doping narrows the bandgap—by up to ∼0.8 eV—and extends visible absorption. Ni‐doped filaments accelerate oxygen evolution (319 mV at 10 mA cm−2) and TM‐doped samples rapidly degrade rhodamine 6G (
Mohamed A. Ibrahim   +6 more
wiley   +1 more source

Molecular Fragmentation of Acetylene by VUV Double Photoionization

open access: yesProceedings, 2017
Acetylene is a simple molecule of interest for interstellar medium (ISM) and planetary atmospheres. The presence of C2H2 was detected by IR spectroscopic measurements. Acetylene was also found as a minor component in the atmosphere of gas giants like the
Stefano Falcinelli   +7 more
doaj   +1 more source

Integrated software package STAMP for minor planets [PDF]

open access: yes
The integrated software package STAMP allowed for rapid and exact reproduction of the tables of the year-book 'Ephemerides of Minor Planets.' Additionally, STAMP solved the typical problems connected with the use of the year-book. STAMP is described. The
Kochetova, O. M., Shor, Viktor A.
core   +1 more source

Star Hoppers: Planet Instability and Capture in Evolving Binary Systems

open access: yes, 2012
Many planets are observed in stellar binary systems, and their frequency may be comparable to that of planetary systems around single stars. Binary stellar evolution in such systems influences the dynamical evolution of the resident planets.
Kratter, Kaitlin M., perets, Hagai B.
core   +1 more source

Development of Laterally Graded X‐Ray Multilayer Optics

open access: yesAdvanced Materials Technologies, EarlyView.
This work presents the development of laterally graded X‐ray multilayer optics with both constant and variable lateral gradients. By precisely controlling substrate speed profiles and mask design, these multilayers achieve highly accurate lateral gradients and excellent sagittal thickness uniformity, making them ideal for spectroscopy application at ...
Arindam Majhi   +11 more
wiley   +1 more source

Metal-polluted White Dwarfs with 21 μm IR Excesses from JWST/MIRI: Planets or Dust?

open access: yesThe Astronomical Journal
White dwarfs with metal pollution are caused by the accretion of rocky dust from tidally disrupted minor bodies and are signposts for planetary systems. These minor bodies are perturbed by planets that have survived post-main-sequence evolution.
John H. Debes   +15 more
doaj   +1 more source

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