Results 41 to 50 of about 5,914 (256)

Application of Kalman filter in detecting pre-earthquake ionospheric TEC anomaly

Geodesy and Geodynamics, 2011
: As an attempt, the Kalman filter was used to study the anomalous variations of ionospheric Total Electron Content (TEC) before and after Wenchuan Ms8.0 earthquake, these TEC data were calculated from the GPS data observed by the Crustal Movement ...
Zhu Fuying, Wu Yun, Fu Ningbo
doaj   +1 more source

Gapless Superconductivity From Extremely Dilute Magnetic Disorder in 2H‐NbSe2‐xSx

Advanced Materials, EarlyView.
We demonstrate that 2H‐NbSe2‐xSx hosts gapless superconductivity at unexpectedly low magnetic impurity concentrations. Combining STM, Bogoliubovde Gennes simulations, DFT, and quasiparticle interference, we comprehensively study the development of gapless behavior and show that SeS substitution reshapes the band structure, enhances nesting, and drives ...
Jose Antonio Moreno, Mercè Roig, Víctor Barrena, Edwin Herrera, Alberto M. Ruiz, Samuel Mañas‐Valero, Antón Fente, Anita Smeets, Jazmín Aragón, Yanina Fasano, Beilun Wu, Maria N. Gastiasoro, Eugenio Coronado, José J. Baldoví, Brian M. Andersen, Isabel Guillamón, Hermann Suderow   +16 more
wiley   +1 more source

Precursor analysis of ionospheric GPS-TEC variations before the 2010 M7.2 Baja California earthquake

Geomatics, Natural Hazards & Risk, 2017
Total electron content (TEC) data obtained from receivers of global navigation satellite systems (GNSSs) are increasingly being used to detect pre-earthquake ionospheric anomalies.
Mustafa Ulukavak, Mualla Yalcinkaya
doaj   +1 more source

Total electron content (TEC) forecasting by Cascade Modeling: A possible alternative to the IRI‐2001 [PDF]

Radio Science, 2008
The ionospheric parameter, total electron content (TEC) is one of the key parameters in navigation and telecommunication applications. A small group at METU in Ankara has been developing data driven models in order to forecast the ionospheric parameters since 1990.
Erdem Turker Senalp, Ersin Tulunay, Yurdanur Tulunay   +2 more
openaire   +1 more source

Conductive Hydrogels for Exogenous Sensing and Cell Fate Control

Advanced Materials, EarlyView.
We engineer electrically conductive hydrogels by combining sulfated glycosaminoglycans with semiconducting polymers. These hydrogels bind bioactive proteins, including growth factors, whose release or retention can be modulated by low‐voltage stimulation. The hydrogels are also integrated as 3D channels in organic electrochemical transistors as part of
Teuku Fawzul Akbar, Carlos Alejandro Jimenez‐Rodriguez, Railia Biktimirova, Ilka Hermes, Thomas Kurth, My Duyen Pham, Mikhail Tsurkan, Jens Friedrichs, Francis L. C. Morgan, Hans Kleemann, Olga Guskova, Uwe Freudenberg, Peter Fratzl, Carsten Werner, Christoph Tondera, Ivan R. Minev   +15 more
wiley   +1 more source

Characterization of GPS total electron content (GPS-TEC) in Antarctica from 2004 to 2011

Annals of Geophysics, 2013
The vertical total electron content (VTEC) obtained from 2004 to 2011 at Comandante Ferraz Brazilian Antarctic Station (62.1°S, 58.4°W) is analyzed to study the mean diurnal, seasonal and annual variations.
Emília Correia, Amanda Junqueira Paz, Mauricio A. Gende   +2 more
doaj   +1 more source

A Regional Model of Topside Ionospheric Effective Scale Heights Derived From Ionosonde and GNSS TEC

Space Weather, 2023
Ionospheric scale height is critical for the structure of electron density profile in the ionosphere. However, mostly, the effective scale heights (fitted with mathematical functions) instead of topside ionospheric scale heights were used to reconstruct ...
Chunhua Jiang, Zhichao Liu, Cong Zhao, Tongxin Liu, Guobin Yang, Hua Shen, Wengeng Huang   +6 more
doaj   +1 more source

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Comparison of Total Electron Content Sources Over Europe During Solar Minimum and Maximum Years (2020 and 2024)

Geodetski Vestnik
In this paper, we presented a comparison of Total Electron Content (TEC) obtained from various sources: ionosondes, the IRI model, the NeQuick model, and Global Navigation Satellite Systems (GNSS).
Stefan Krstić, Miljana Todorović-Drakul, Sanja Grekulović, Dušan Petković, Oleg Odalović   +4 more
doaj   +1 more source

Study of Total Electron Content-TEC and electron density profile during geomagnetic storms

, 2018
Total Electron Content (TEC) and electron density are the basic parameters, which determine the major properties of the Ionosphere. Detail study of the ionospheric TEC and electron density variations has been carried out during geomagnetic storms, with longitude and latitude, for four different locations: (24°W-14°W, 25°S-10°S); (53°W- 46°W, 04°N-14°N);
Bhattarai, Niraj, Chapagain, Narayan Prasad, Adhikari, Binod   +2 more
openaire   +2 more sources