Results 91 to 100 of about 1,956,624 (317)

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

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

open access: yesAdvanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang   +14 more
wiley   +1 more source

Twillingate Sun, 1893 [PDF]

open access: yes, 1893
The Twillingate Sun was published from 1880 to 1953. The original title, Twillingate Sun and Northern Weekly Advertiser, was shortened to Twillingate Sun in ...

core  

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

Extremely Long Electron Lifetime in Spontaneously Passivated Polycrystalline Perovskite Layers via Illumination‐Assisted Trap Filling

open access: yesAdvanced Functional Materials, EarlyView.
ABSTRACT Perovskite solar cells (PSCs) are promising next‐generation photovoltaics. The high performance of PSCs is attributed to the long carrier lifetimes of perovskite photoabsorbers. However, the carrier lifetimes of polycrystalline perovskite layers, which serve as the photoabsorbers in practical PSCs, have remained limited to several tens of ...
Naoyuki Nishimura   +2 more
wiley   +1 more source

The morning sun. [PDF]

open access: yes, 1907
Published by the Sun Company from 1907 sometime through 1909, the Tallahassee (FL) Morning Sun [LCCN: sn95047371], a self-declared "Democratic" newspaper, was a continuation of the Tallahassee (FL) Daily Capital [LCCN: sn95026133].

core  

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

Giant Magnetic Coercivity Driven by Spin‐Bag Ferromagnetism in Epitaxial Sr3YCo4O10+δ Films with Engineered 2D Oxygen Vacancy Ordering

open access: yesAdvanced Functional Materials, EarlyView.
A giant magnetic coercivity and a vertical shift of hysteresis loops are demonstrated in Sr3YCo4O10+δ epitaxial films. The hard magnetic behavior originates from ferromagnetic spin bags stabilized within a long‐range ordered oxygen‐vacancy structure.
Yanbin Chen   +12 more
wiley   +1 more source

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