Results 1 to 10 of about 4,928 (142)

Development of Comprehensive PNT and Resilient PNT [PDF]

open access: yesJournal of Geodesy and Geoinformation Science, 2023
Any single Positioning, Navigation and Timing (PNT) technology has its vulnerability and limits, even the powerful Global Navigation Satellite System (GNSS) is no exception.
Xia REN, Yuanxi YANG
doaj   +2 more sources

Resilient PNT Concept Frame [PDF]

open access: yesJournal of Geodesy and Geoinformation Science, 2019
The concept of resilient positioning, navigation and timing (PNT) is described. The definition of resilient PNT is given, the relationship between integrated (or comprehensive) PNT and resilient PNT is analyzed, and it is pointed out that the integrated ...
Yuanxi YANG
doaj   +2 more sources

ETS transcription factor pointed controls germline survival in Drosophila. [PDF]

open access: yesPLoS Genetics
Proper gonad development is a pre-requisite for gametogenesis and reproduction. During female gonad formation in Drosophila, the EGF receptor (EGFR) signalling pathway ensures the correct number of primordial germ cells (PGCs) populate the larval gonad ...
Alicia E Rosales-Nieves   +4 more
doaj   +2 more sources

METTL3 inhibits primed-to-naïve transition of pluripotent stem cells through m6A-YTHDF2-pluripotency/Gstp1 mRNA degradation axis [PDF]

open access: yesCell Regeneration
N6-methyladenosine (m6A) plays crucial roles in development and cellular reprogramming. During embryonic development, pluripotency transitions from a naïve to a primed state, and modeling the reverse primed-to-naïve transition (PNT) provides a valuable ...
Sa Li   +13 more
doaj   +2 more sources

Environmental exposure to perchlorate, nitrate, and thiocyanate in relation to biological aging in U.S. adults, a cross-sectional NHANES study [PDF]

open access: yesFrontiers in Public Health
BackgroundFew studies have investigated the associations between perchlorate, nitrate, and thiocyanate (PNT) and biological aging. This study aimed to assess the association between PNT and biological aging among U.S.
Weiliang Kong, Yina Jin
doaj   +2 more sources

The hidden danger: prolonged exposure to inorganic contaminants and kidney health in adolescents [PDF]

open access: yesRenal Failure
Research on the impact of prolonged exposure to inorganic contaminants, such as perchlorate, nitrate, and thiocyanate (PNT), on the kidney health of individuals in the 12 ∼ 19 age range is lacking.
Xiaoran Xue   +5 more
doaj   +2 more sources

Pentostatin Biosynthesis Pathway Elucidation and Its Application

open access: yesFermentation, 2022
Pentostatin (PNT), a nucleoside antibiotic with a 1,3-diazo ring structure, is distributed in several actinomycetes and fungi species. Its special structure makes PNT possess a wide spectrum of biological and pharmacological properties, such as ...
Hongyu Zhang   +4 more
doaj   +1 more source

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

open access: yesSensors, 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   +6 more
doaj   +1 more source

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

open access: yesSensors, 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   +3 more
doaj   +1 more source

Lunar PNT system concept and simulation results

open access: yesOpen 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   +5 more
doaj   +1 more source

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