Results 51 to 60 of about 11,557,211 (324)

Spread-F equatorial fountain of plasma irregularities [PDF]

, 1989
95-98A belt of abnormally large uplifting of the whole F region occurs over a comparatively narrow latitude of a bout 6° from the dip equator on the nights with strong equatorial spread F. This is accompanied with post-sunset decrease of F layer critical
Rastogi, R G
core  

Life‐Like Ferrous Oxide Microspheres from Kombucha

Advanced Materials Interfaces, EarlyView.
Kombucha bacterial cellulose, sodium alginate, and ferrous nitrate self‐assemble into membrane‐enclosed iron oxide microspheres. These microspheres bud daughter vesicles, sustain 24‐h electrochemical oscillations, and filter theta‐band signals.
Panagiotis Mougkogiannis, Anna Nikolaidou, Andrew Adamatzky   +2 more
wiley   +1 more source

Threshold Height & Equatorial Spread F [PDF]

, 1976
259-261About 300 events of disappearance and subsequent reappearance of spread F at three equatorial stations, Singapore, Bangkok and Ibadan have been examined for the sunspot minimum and maximum years.
Subrahmanyam, V, Rao, M Srirama
core  

Microscale Mapping of Fiber Strain and Damage in Composite Wrinkled Laminates Using Computed Tomography Assisted Wide‐Angle X‐Ray Scattering

Advanced Science, EarlyView.
This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong, James Trevarthen, Igor Dolbnya, Wadwan Singhapong, Nicholas Pilato, Richard Butler, Jiraphant Srisuriyachot, Alexander J. G. Lunt   +7 more
wiley   +1 more source

Equatorial Spread F structures and associated airglow intensity variations observed over Gadanki [PDF]

Annales Geophysicae, 2008
Co-ordinated campaigns have been conducted from Gadanki (13.5° N, 79.2° E, dip lat 6.4° N) by operating simultaneously the Indian MST radar in ionospheric coherent backscatter mode and by monitoring thermosphere airglow line emissions ...
R. Sekar, D. Chakrabarty, R. Narayanan, A. K. Patra   +3 more
doaj   +1 more source

Investigating the Role of Gravity Waves on Equatorial Ionospheric Irregularities Using TIMED/SABER and C/NOFS Satellite Observations

Atmosphere, 2022
In this paper, for the first time, simultaneous atmospheric temperature perturbation profiles obtained from the TIMED/SABER satellite and equatorial ion density and vertical plasma drift velocity observations with and without ESF activity obtained from ...
Melessew Nigussie, Mark Moldwin, Endawoke Yizengaw   +2 more
doaj   +1 more source

Occurrence rate of equatorial Spread F and GPS ROTI in the ionospheric anomaly region over Vietnam

Vietnam Journal of Earth Sciences
This paper presents the first observations of the occurrence rates of Spread F and GPS total electron content (TEC) index (ROTI) over Vietnam at the equatorial trough and the northern tropical crest of ionization anomaly in the Asian sector.
Hong Pham Thi Thu, Mazaudier Christine Amory, M. Le Huy, Susumu Saito, Dũng Nguyễn Thành, Ngoc Luong Thi, Hung Luu Viet, Thang Nguyen Chien, Thanh Nguyen Ha, M. Nishioka, P. Septi   +10 more
semanticscholar   +1 more source

Atomic Tuning of Metal‐Support Interactions for Pathway‐Selective CO2 Photoreduction on TiO2

Advanced Science, EarlyView.
Single‐atom Fe and Cu catalysts anchored on TiO2 steer photocatalytic CO2 reduction toward distinct pathways. Fe sites favor rapid *CO desorption and selective CO formation, whereas Cu sites stabilize *CHO intermediates, enabling deep reduction and C─C coupling. Combined spectroscopy and DFT calculations reveal how metal–support interactions and oxygen
Dongyun Kim, Wonjae Ko, Byoung‐Hoon Lee, Sanghoon Kim, Yun Do Kim, Hyunsoo Ahn, Yoon Jung, Chan Woo Lee, Kug‐Seung Lee, Eunhee Gong, Junho Lee, Minho Kim, Taeghwan Hyeon, Su‐Il In   +13 more
wiley   +1 more source

Broadening Hard‐Magnet Discovery Beyond Symmetry Constraints via Unified Effective Anisotropy

Advanced Science, EarlyView.
A unified effective‐anisotropy descriptor (Keff) extends hard‐magnet screening across all seven crystal systems, beyond the uniaxial restriction of conventional searches. Machine‐learning screening of 9320 known ferromagnets and diffusion‐model generation together yield 38 rare‐earth‐free or ‐lean candidates with DFT‐validated magnetic hardness (κ > 1),
Hojae Kim, Hyeondeok Shin, Kyungju Nam, Seunghyo Noh, Donghwi Kim, Yousung Jung   +5 more
wiley   +1 more source

Collisional Rayleigh-Taylor instability and shear-flow in equatorial Spread-F plasma [PDF]

Annales Geophysicae, 2003
Collisional Rayleigh-Taylor (RT) instability is considered in the bottom side of the equatorial F-region. By a novel nonmodal calculation it is shown that for an applied shear flow in equilibrium, the growth of the instability is considerably ...
N. Chakrabarti, G. S. Lakhina
doaj   +1 more source