Results 121 to 130 of about 35,368 (282)

Technique of ionospheric parameters automatic determination from data of vertical sounding with a continuous chirp signal

Solar-Terrestrial Physics
We present a technique for determination of ionospheric parameters based on automatic interpretation of vertical sounding (VS) ionograms. Ionograms are interpreted using points with significant amplitude, which were detected after secondary data ...
Ponomarchuk Sergey, Grozov Viktor
doaj   +1 more source

Оценка прогностической эффективности ионосферных возмущений, предшествующих наступлению землетрясений с магнитудой M≥ 5.0 в Камчатском регионе

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
Аномальные изменения параметров, характеризующих состояние ионосферных областей E и F, наблюдаемые перед наступлением сейсмических событий, могут рассматриваться как возможные ионосферные предвестники этих землетрясений.
Павлов, А.В.
doaj   +1 more source

A comparison between Nimbus 5 THIR and ITPR temperatures and derived winds with rawinsonde data obtained in the AVE 2 experiment [PDF]

During the period of May 11 and 12, 1974, NASA conducted its second Atmospheric Variability Experiment (AVE II) over the eastern United States. In this time interval, two Nimbus 5 orbits crossed the AVE II area, providing a series of ITPR soundings as ...
Arnold, J. E., Fuelberg, H. E., Scoggins, J. R.   +2 more
core   +1 more source

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

Formation Mechanisms of Large‐Scale Folding in Greenland's Ice Sheet

Geophysical Research Letters
Radio‐echo sounding (RES) shows large‐scale englacial stratigraphic folds are ubiquitous in Greenland's ice sheet. However, there is no consensus yet on how these folds form.
Yu Zhang, Till Sachau, Steven Franke, Haibin Yang, Dian Li, Ilka Weikusat, Paul D. Bons   +6 more
doaj   +1 more source

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Overview of Promising Solutions in Subsurface Sounding Equipment. [PDF]

Sensors (Basel), 2023
Bryakin IV, Bochkarev IV, Khramshin VR, Gasiyarov VR.   +3 more
europepmc   +1 more source

Adaptive Twisting Metamaterials

Advanced Materials, EarlyView.
This work introduces torque‐controlled twisting metamaterials as a transformative platform for adaptive crashworthiness. By combining multiscale predictive modeling with experimental validation on additively manufactured gyroids, it demonstrates tunable stiffness, collapse stress, and energy absorption.
Mattia Utzeri, Maria L. Gatto, Edoardo Mancini, Donato Orlandi, Daniele Cortis, Marco Sasso, Shanmugam Kumar   +6 more
wiley   +1 more source