Results 31 to 40 of about 1,255 (307)

Inferring tropospheric radio refractivity using optimization methods [PDF]

, 2021
La réfraction troposphérique anormale entraîne une déviation des performances des systèmes radar marine par rapport à la normale. L'objectif principal de la thèse est de développer une technique d'inversion de la réfractivité pour prédire les anomalies de la couverture du radar avec précision et en temps réel.
openaire   +1 more source

Refractivity variations and propagation at Ultra High Frequency

Results in Physics, 2017
Present framework is established to deal with the refractivity variations normally affected the radio waves propagation at different frequencies, ranges and different environments.
I. Alam, M. Najam-Ul-Islam, U. Mujahid, S.A.A. Shah, Rizwan Ul Haq   +4 more
doaj   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

Advanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana, Indra Apsite, Leonid Ionov   +2 more
wiley   +1 more source

High Temporal Resolution Refractivity Retrieval from Radar Phase Measurements

Remote Sensing, 2018
Knowledge of the spatial and temporal variability of near-surface water vapor is of great importance to successfully model reliable radio communications systems and forecast atmospheric phenomena such as convective initiation and boundary layer processes.
Rubén Nocelo López, Verónica Santalla del Río   +1 more
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Estimating the refractivity bias of FORMOSAT-7/COSMIC-2 Global Navigation Satellite System (GNSS) radio occultation in the deep troposphere [PDF]

Atmospheric Measurement Techniques
FORMOSAT-7/COSMIC-2 radio occultation (RO) measurements show promise for observing the deep troposphere and for providing critical information on the Earth's planetary boundary layer (PBL).
G. H. Pham, S.-C. Yang, S.-C. Yang, C.-C. Chang, S.-Y. Chen, C. Y. Huang   +5 more
doaj   +1 more source

Exponential model of radio refractive index over india

IEE-IERE Proceedings - India, 1969
Based on the radiosonde data during 1956-1960 biexponential model of radio refractive index has been derived at12 stations in India for the four representative months recommended by International Radio Consultative Committee (CCIR), viz., February, May, August and November.
HN SRIVASTAVA, RB PATHAK
openaire   +1 more source

Super‐refraction effects on GPS radio occultation refractivity in marine boundary layers [PDF]

Geophysical Research Letters, 2010
With the combination of global coverage, high vertical resolution, and all‐weather capability, GPS radio occultation (RO) is an emerging satellite remote sensing technique that can probe the atmospheric boundary layer (ABL) on a global basis. However, a systematic negative bias (commonly referred to as N‐bias) remains in derived refractivity profiles ...
F. Xie, D. L. Wu, C. O. Ao, E. R. Kursinski, A. J. Mannucci, S. Syndergaard   +5 more
openaire   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

GPS Radio Occultation Data Assimilation in the AREM Regional Numerical Weather Prediction Model for Flood Forecasts

Advances in Meteorology, 2018
Based on the Backward Four-Dimensional Variational Data Assimilation (Backward-4DVar) system with the Advanced Regional Eta-coordinate Model (AREM), which is capable of assimilating radio occultation data, a heavy rainfall case study is performed using ...
Wei Cheng, Youping Xu, Zhiwu Deng, Chunli Gu   +3 more
doaj   +1 more source