Results 11 to 20 of about 51,964 (204)

Fault-Free Protection Level Equation for CLAS PPP-RTK and Experimental Evaluations

Sensors, 2022
Centimeter level augmentation system (CLAS) of the quasi-zenith satellite system (QZSS) is the first precise point positioning-real time kinematic (PPP-RTK) augmentation system of the global navigation satellite system (GNSS), which is currently ...
Euiho Kim, Jaeyoung Song, Yujin Shin, Saekyul Kim, Pyo-Woong Son, Sulgee Park, Sanghyun Park   +6 more
doaj   +1 more source

GNSS Spoofing Detection by Supervised Machine Learning with Validation on Real-World Meaconing and Spoofing Data—Part II

Sensors, 2020
Global Navigation Satellite System (GNSS) meaconing and spoofing are being considered as the key threats to the Safety-of-Life (SoL) applications that mostly rely upon the use of open service (OS) signals without signal or data-level protection. While a
Silvio Semanjski, Ivana Semanjski, Wim De Wilde, Sidharta Gautama   +3 more
doaj   +1 more source

On PNT equivalences for Beurling numbers [PDF]

, 2017
In classical prime number theory several asymptotic relations are considered to be "equivalent" to the prime number theorem. In the setting of Beurling generalized numbers, this may no longer be the case.
Debruyne, Gregory, Vindas Diaz, Jasson
core   +2 more sources

Lunar PNT system concept and simulation results

Open Astronomy, 2022
The revived interest of many countries and the growing number of ongoing and scheduled missions to the Moon increases the significance of supporting navigation system development.
Kaplev Sergey, Titov Maxim, Valentirova Tamara, Mozharov Igor, Bolkunov Alexei, Yaremchuk Valeriy   +5 more
doaj   +1 more source

Reference ranges for foetal nasal bone length, prenasal thickness, and interocular distance at 18 to 24 weeks’ gestation in low-risk pregnancies

BMC Pregnancy and Childbirth, 2017
Background The aim of the present study was to establish the normal ranges for foetal nasal bone length (NBL), prenasal skin thickness (PNT), interocular distance (IOD), and ratio of prenasal thickness to- nasal bone length (PNT/ NBL) at 18–24 weeks ...
Ayşegül Altunkeser, M. Kazım Körez
doaj   +1 more source

Concise Definition of Aviation PNT User Requirements Based on OFD [PDF]

E3S Web of Conferences, 2020
Definition of aviation is the core of PNT system requirements analysis and research, The quality of PNT user requirements definition will directly affect the scientificity and effectiveness of other research work of the system, QFD(Quality Function ...
Wang Yan, Zhao Wei, Yu Su, Shen YangHe
doaj   +1 more source

Measuring Ventilatory Activity with Structured Light Plethysmography (SLP) Reduces Instrumental Observer Effect and Preserves Tidal Breathing Variability in Healthy and COPD

Frontiers in Physiology, 2017
The use of a mouthpiece to measure ventilatory flow with a pneumotachograph (PNT) introduces a major perturbation to breathing (“instrumental/observer effect”) and suffices to modify the respiratory behavior.
Marie-Cécile Niérat, Bruno-Pierre Dubé, Bruno-Pierre Dubé, Bruno-Pierre Dubé, Claudia Llontop, Claudia Llontop, Agnès Bellocq, Agnès Bellocq, Lila Layachi Ben Mohamed, Lila Layachi Ben Mohamed, Isabelle Rivals, Isabelle Rivals, Christian Straus, Christian Straus, Thomas Similowski, Thomas Similowski, Pierantonio Laveneziana, Pierantonio Laveneziana   +17 more
doaj   +1 more source

Foundational PNT profile :

, 2021
The national and economic security of the United States (US) is dependent upon the reliable functioning of the nation’s critical infrastructure. Positioning, Navigation, and Timing (PNT) services are widely deployed throughout this infrastructure.
Michael Bartock, Joseph Brule, Ya-Shian Li-Baboud, Suzanne Lightman, James McCarthy, Karen Reczek, Doug Northrip, Arthur Scholz, Theresa Suloway   +8 more
openaire   +1 more source

Multisensor navigation systems: a remedy for GNSS vulnerabilities? [PDF]

, 2016
Space-based positioning, navigation, and timing (PNT) technologies, such as the global navigation satellite systems (GNSS) provide position, velocity, and timing information to an unlimited number of users around the world.
Grejner-Brzezinska, Dorota A., Kealy, Allison, Miller, Mikel M., Moore, Terry, Raquet, John F., Toth, Charles K.   +5 more
core   +2 more sources

Major transcriptome re-organisation and abrupt changes in signalling, cell cycle and chromatin regulation at neural differentiation in vivo [PDF]

, 2014
Here, we exploit the spatial separation of temporal events of neural differentiation in the elongating chick body axis to provide the first analysis of transcriptome change in progressively more differentiated neural cell populations in vivo.
Abranches, Akai, Altschul, Amijee, Arbeitman, Aubert, Bel-Vialar, Benjamini, Bradford, Brown, Chitnis, Delfino-Machín, Deschamps, Deschenes, Diez del Corral, Diez del Corral, Dittmar, Eblaghie, Fior, Goodwin, Hamburger, Henrique, Irizarry, Jares, Kuhns, Landeira, Lessard, Li, Lobjois, Lunn, Martin, Miettinen, Minowada, Mitiku, Olivera-Martinez, Ozbudak, Ozsolak, Park, Patel, Perry, Rae, Rae, Schurch, Smyth, Smyth, Stavridis, Stern, Storey, Sultan, Tsakiridis, Tzouanacou, van der Vlag, Wilcock, Willnow, Wilson, Wu, Zhang, Zhao   +57 more
core   +5 more sources