Results 111 to 120 of about 858,402 (225)

Oldest well‐preserved euprimate petrosal, from the early Eocene of India (Vastan Lignite Mine, Gujarat)

The Anatomical Record, EarlyView.
Abstract An exquisitely preserved, isolated partial petrosal with associated fragmentary stapes is described from the Vastan Lignite Mine (Gujarat, India), dated to the early Eocene (~54.5 Ma). Several anatomical traits (e.g., large petrosal plate; posterolateral entry of the internal carotid artery to the tympanic cavity; bony tubes surrounding the ...
Mary T. Silcox, Kenneth D. Rose, Rachel H. Dunn, Kishor Kumar, Rajendra S. Rana, Ashok Sahni, Lachham Singh, Thierry Smith, Jordan W. Crowell   +8 more
wiley   +1 more source

A statistical study of poleward boundary intensifications (PBIs) associated with the arrival of polar cap patches

Frontiers in Astronomy and Space Sciences
Poleward Boundary Intensifications (PBIs) are transient auroral brightenings at the poleward edge of the auroral oval that serve as optical tracers of nightside plasma transport and energy deposition.
Yu-Lin Fang, Zan-Yang Xing, Qing-He Zhang, Qing-He Zhang, Han‐Xian Fang, Hui-Gen Yang, Ze-Jun Hu, Yong Wang, Yu-Zhang Ma, Sheng Lu, Zhi-Feng Xiu, Bian-Long Zhao, Xiang-Yu Wang, Duan Zhang, Xin-Ming Chen   +14 more
doaj   +1 more source

Clade‐wide morphological and functional variation of the sauropsid columella

The Anatomical Record, EarlyView.
Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock, Serjoscha W. Evers, Tiago R. Simões, Garth M. Spellman, Daniel J. Field   +4 more
wiley   +1 more source

Polar cap plasma patch primary linear instability growth rates compared

Journal of Geophysical Research: Space Physics, 2016
AbstractFour primary plasma instability processes have been proposed in the literature to explain the generation of phase scintillation associated with polar cap plasma patches. These are the gradient drift, current convective, and Kelvin‐Helmholtz instabilities and a small‐scale “turbulence” process.
Burston, Robert, Mitchell, Cathryn; id_orcid 0000-0003-1964-8723, Astin, Ivan; id_orcid 0000-0001-8964-6286   +2 more
openaire   +1 more source

Leveraging Big Multitemporal Multisource Satellite Data and Artificial Intelligence for the Detection of Complex and Invisible Features: The Case of Extensive Irrigation Mapping

Archaeological Prospection, EarlyView.
ABSTRACT The detection of buried or obscured archaeological features remains a central challenge in landscape archaeology, particularly in the irrigated floodplains of Mesopotamia where levees and canals formed the basis of complex agrarian systems. This study presents a deep learning–based approach for the large‐scale, automated detection of ancient ...
Nazarij Buławka, Hector A. Orengo, Felipe Lumbreras Ruiz, Iban Berganzo‐Besga, Ekta Gupta   +4 more
wiley   +1 more source

Effect of Polar Cap Patches on the High‐Latitude Upper Thermospheric Winds

Journal of Geophysical Research: Space Physics
AbstractThis study focuses on the poorly known effect of polar cap patches (PCPs) on the ion‐neutral coupling in the F‐region. The PCPs were identified by total electron content measurements from the Global Navigation Satellite System (GNSS) and the ionospheric parameters from the Defense Meteorological Satellite Program spacecraft.
L. Cai, A. Aikio, S. Oyama, N. Ivchenko, H. Vanhamäki, I. Virtanen, S. Buchert, M. L. Mekuriaw, Y. Zhang   +8 more
openaire   +4 more sources

Neurovascular coupling in bone regeneration: Mechanisms, advanced biomaterials and challenges

BMEMat, EarlyView.
This figure illustrates various material strategies for neurovascularized bone regeneration, including electroactive scaffolds, ion‐loaded materials, drug delivery systems, surface modifications, cells/cell products, growth factors, and peptides. These approaches aim to synergistically promote the regeneration of neural, vascular, and bone tissues ...
Yixin Ma, Nan Jiang, Liyuan Chen, He Zhang, Xinjia Cai, Karan Gulati, Danqing He, Zhigang Cai, Yan Liu   +8 more
wiley   +1 more source

Llif yr atmosffer drydanol dros begwn y gogledd: arsylwadau tomograffi radio a SuperDARN [PDF]

, 2007
The paper investigates the structure and behaviour of the nighttime ionised (electrified) atmosphere in the polar and auroral regions; the region where the aurora borealis occurs.
Pryse, SE, Middleton, HR, Wood, AG
core  

Integrating chemo‐mechanical cues in nano‐microscale environments for stem cell regulation

BMEMat, EarlyView.
Nano/microscale control strategies, including nano/microscale materials, ligand spacings, and cell encapsulating gels, cell mechanics, integrin signaling, and biochemical cues to direct stem cell fate, tissue regeneration, and organoid engineering, enabling advanced biomedical applications through mechanoregulation at cell‐material interfaces ...
Rajendra K. Singh, Varsha Sagar, Amal George Kurian, Shreyas Kumar Jain, Hye Sung Kim, Hae‐Won Kim   +5 more
wiley   +1 more source

Diurnal and seasonal occurrence of polar patches

Annales Geophysicae
Analysis of the diurnal and seasonal variation of polar patches, as identified in two years of HF-radar data from Halley, Antarctica during a period near sunspot maximum, shows that there is a broad maximum in occurrence centred about magnetic noon, not ...
A. S. Rodger, A. C. Graham
doaj