Results 91 to 100 of about 650,723 (318)

Equivalence analysis of spaceborne SAR based on airborne experiments

Dianzi Jishu Yingyong
To address technical challenges in engineering verification of spaceborne Synthetic Aperture Radar (SAR) systems, this study designs a complete airborne experiment equivalence analysis scheme.
Yu Chunhui, Zhang Shiwei, Liu Yuanlou, Xing Sirui, Xu Jing   +4 more
doaj   +1 more source

Precise time scales and navigation systems: mutual benefits of timekeeping and positioning

Satellite Navigation, 2020
The relationship and the mutual benefits of timekeeping and Global Navigation Satellite Systems (GNSS) are reviewed, showing how each field has been enriched and will continue to progress, based on the progress of the other field.
Patrizia Tavella, Gérard Petit
doaj   +1 more source

Characterizing Cutaneous α‐Synuclein Deposition and Seeding Activity in Parkinson's Disease Subtypes

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cutaneous phosphorylated α‐synuclein (p‐syn) and α‐synuclein seeding activity are promising biomarkers for Parkinson's disease (PD), but their clinical value remains uncertain due to disease heterogeneity. This study evaluates these two biomarkers in PD patients to inform phenotype‐specific diagnosis and disease severity assessment ...
Yuting Jin, Tianyuan Yang, Minglei Liu, Haiyang Luo, Jing Yuan, Ke Zhang, Xinsheng Han, Jing Yang, Yuming Xu   +8 more
wiley   +1 more source

The Case of a 40‐Year‐Old Man With New‐Onset Status Epilepticus in the Setting of HIV Infection

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT A 40‐year‐old man from Andhra Pradesh in India, while on regular antiretroviral treatment (ART) for long‐standing HIV infection presented with a 1‐day history of new‐onset status epilepticus. CT and MRI brain showed multifocal cerebral ring lesions, some of which demonstrated characteristic ‘hole‐with‐a‐dot’ sign.
Vadde Akhil, Ramachandiran Nandhagopal
wiley   +1 more source

Satellite system performance assessment for in-flight entertainment and air traffic control [PDF]

, 2007
Concurrent satellite systems have been proposed for IFE (In-Flight Entertainment) communications, thus demonstrating the capability of satellites to provide multimedia access to users in aircraft cabin. At the same time, an increasing interest in the use
Pirovano, Alain, Bousquet, Michel, Radzik, José, Tao, Na   +3 more
core  

Performance of VoIP with DCCP for satellite links [PDF]

, 2009
We present experimental results for the performance of selected voice codecs using the Datagram Congestion Control Protocol (DCCP) with TCP-Friendly Rate Control (TFRC) congestion control mechanism over a satellite link.
Lochin, Emmanuel, G. Sarwar, Sarwar, Golam, R. Boreli, Boreli, Roksana, E. Lochin   +5 more
core   +1 more source

Real-time integrity monitoring for a wide area precise positioning system

Satellite Navigation, 2020
The wide area precise positioning system (WAPPS) is a high-precision positioning system based on a global navigation satellite system. Using a GEO satellite or a communication network, it provides users, in its service area, with real-time satellite ...
Yuechen Wang, Jun Shen
doaj   +1 more source

Addressing Economic Insecurities Can Improve Patient‐Reported Outcomes in Lupus

Arthritis Care &Research, EarlyView.
Objective Economic insecurities, such as food, housing, transportation, and financial challenges, are modifiable risk factors and influence patient‐reported outcomes (PROs) in systemic lupus erythematosus (SLE). We examined the following: (1) associations between economic insecurities and PROs, and (2) the impact of screening and addressing economic ...
Jay Patel, Tripti Singh, Meredith Ingersoll, Shelby Gomez, Amanda Weber, Sarah E. Panzer, Sancia Ferguson, Christie M. Bartels, Shivani Garg   +8 more
wiley   +1 more source

Disturbance-observer-based high precision control of small reaction flywheels

Dianzi Jishu Yingyong
Reaction flywheels is a key component of the satellite attitude control system, and its performance is directly related to the control accuracy of optical remote sensing satellites.
Shen Ying, Zhang Xiaolei, Kong Lingbo, Hu Huiying   +3 more
doaj   +1 more source

Global capabilities of BeiDou Navigation Satellite System

Satellite Navigation, 2020
The BeiDou Navigation Satellite System (BDS) has completed the constellation deployment and started to provide global services. After achieving the capabilities of global coverage, global first-class accuracy for Positioning, Navigation and Timing (PNT),
Jun Lu, Xia Guo, Chengeng Su
doaj   +1 more source