Results 81 to 90 of about 1,222,295 (266)

The Theme and Effective Factors in the Transformation and Development of «Swastika» Motif in Iranian Art from Ancient to Seljuk Period [PDF]

open access: yesپیکره
Introduction: One of the oldest geometric motifs of the ancient world is a motif created from two crossed lines - a cross with broken arms or a ninety-degree angle.
Mohamad Motevalli   +2 more
doaj   +1 more source

1999 Exterior Damage to the Sun Tavern after the Salt Lake Tornado

open access: yes, 1999
Color photograph of the Sun Tavern Taken in 1999 showing the damage to the building after a tornado hit Salt Lake CIty on august 11 ...

core  

The Role of Ultra‐Thin Buffer Layers for Achieving Ultra‐Low Dark Currents in Single‐Component Organic Photodetectors

open access: yesAdvanced Functional Materials, EarlyView.
Here, SubNc single‐component organic photodiodes (SC‐OPDs) are investigated, which achieve highly competitive performance metrics, including high EQE, ultra‐low JD, and high specific detectivity (D*). This study emphasizes the critical role of an organic buffer layer in studying the interface energetics and effects to achieve state‐of‐the‐art ...
Anncharlott Kusber   +12 more
wiley   +1 more source

Simulator Posisi Matahari dan Bulan Berbasis Web dengan WebGL

open access: yesJurnal Nasional Teknik Elektro, 2014
Moon as a satellite of the earth has an important role for the life of the earth. Apart from being a source of illumination, moon also has an effect on the earth both on land and at sea.
Kamshory, Syafii
doaj  

High-accuracy polarization measurements of the white-light corona during the 2023 total solar eclipse

open access: yesFrontiers in Astronomy and Space Sciences
This study measured the polarization of the white-light corona during the total solar eclipse on 20 April 2023, which occurred under high solar activity.
Yoichiro Hanaoka   +4 more
doaj   +1 more source

PROGNOSES AND ANOMALY OF 24TH CYCLE OF SOLAR ACTIVITY

open access: yesOdessa Astronomical Publications, 2014
Development of solar activity in 24th cycle has specific peculiarity  – non-monotonous increasing of solar activity on grown phase which occurs for 1/3 number of all cycles.
V. G. Lozitsky, V. M. Efimenko
doaj   +1 more source

Fast Charge–Discharge of LiNi0.9Co0.05Mn0.05 Enabled by a Bikitaite‐Infused Separator for Li Metal Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A bikitaite‐infused cellulose separator is introduced for Li metal batteries, leveraging bikitaite zeolite's ion‐conductive properties to regulate Li+‐ion flux and suppress dendrite growth. The membrane design ensures uniform Li plating, enhanced electrolyte wettability, and robust thermal/mechanical stability, delivering stable performance and low ...
Isheunesu Phiri   +2 more
wiley   +1 more source

Are the sunspots really vanishing?

open access: yesJournal of Space Weather and Space Climate, 2012
Context: The elapsed solar cycle (23) ended with an exceptionally long period of low activity and with unprecedented low levels for various series of solar irradiance and particle flux measurements.
Clette Frédéric, Lefèvre Laure
doaj   +1 more source

X‐Functionality–Driven Photocatalytic Hydrogen Evolution in 2D 4‐X‐PEA2SnI4 Perovskites

open access: yesAdvanced Functional Materials, EarlyView.
We report a water‐based synthesis of 2D 4‐X‐PEA2SnI4 perovskite microcrystals with prominent photocatalytic (PC) activity for H2 production. The synergy between organic functionalization and HI‐derived iodide scavenges holes suppress octahedral distortion, and favor electron accumulation, enabling a PC H2 evolution ∼20 µmol·g−1 and long‐term stability ...
Taeyeon Kim   +21 more
wiley   +1 more source

Homogenous FACsPbI3 Perovskite Solar Cells Enabled by a Seed‐Facilitated Cation Exchange Strategy

open access: yesAdvanced Functional Materials, EarlyView.
A novel seed‐facilitated cation exchange strategy is designed for homogenous FACsPbI3 perovskites using the biomass‐derived solvent γ‐valerolactone. Pre‐deposited 0D Cs4PbI6 seeds induce rapid nucleation and efficient cation exchange, producing a uniform FA–Cs distribution and significantly reducing defect density, enabling high‐performance and stable ...
Meng Ren   +10 more
wiley   +1 more source

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