Results 31 to 40 of about 468,322 (270)
Space Weather, 2021 While low and high‐latitude ionospheric scintillation have been extensively reported, significantly less information is available about the properties of and conditions leading to mid‐latitude scintillations.
F. S. Rodrigues +4 more
doaj +1 more source
A theoretical study of ozone isotopic effects using a modified ab initio potential energy surface [PDF]
, 2002 A modified ab initio potential energy surface (PES) is used for calculations of ozone recombination and isotopic exchange rate constants. The calculated low-pressure isotopic effects on the ozone formation reaction are consistent with the experimental ...
Chen, Wei-Chen +2 more
core +1 more source
Aerospace, 2020 Opening the sky to new classes of airspace user is a political and economic imperative for the European Union. Drone industries have a significant potential for economical growth according to the latest estimations.
Cristina Barrado +9 more
doaj +1 more source
Unmanned Aerial Traffic Management System Architecture for U-Space In-Flight Services
Applied Sciences, 2021 This paper presents a software architecture for Unmanned aerial system Traffic Management (UTM). The work is framed within the U-space ecosystem, which is the European initiative for UTM in the civil airspace.
Carlos Capitán +4 more
doaj +1 more source
Galileo and EGNOS as an asset for UTM safety and security [PDF]
, 2019 GAUSS (Galileo-EGNOS as an Asset for UTM Safety and Security) is a H2020 project1 that aims at designing and developing high performance positioning systems for drones within the U-Space framework focusing on UAS (Unmanned Aircraft System) VLL (Very Low ...
Andrade-Cetto, Juan +7 more
core
Quasi-Hamiltonian quotients as disjoint unions of symplectic manifolds
, 2007 We show that the quotient associated to a quasi-Hamiltonian space has a symplectic structure even when 1 is not a regular value of the momentum map: it is a disjoint union of symplectic manifolds of possibly different dimensions, which generalizes a ...
Schaffhauser, Florent
core +2 more sources
Accurate first-derivative nonadiabatic couplings for the H3 system [PDF]
, 2001 A conical intersection exists between the ground (1 2 A[prime]) and the first-excited (2 2A[prime]) electronic potential energy surfaces (PESs) of the H3 system for C3v geometries.
Abrol, Ravinder +3 more
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction We developed MedSupport, a multilevel medication adherence intervention designed to address root barriers to medication adherence. This study sought to explore the feasibility and acceptability of the MedSupport intervention strategies to support a future full‐scale randomized controlled trial.
Elizabeth G. Bouchard +8 more
wiley +1 more source
Threat Management Methodology for Unmanned Aerial Systems Operating in the U-Space
IEEE Access, 2022 This paper presents a threat management methodology for Unmanned Aircraft Systems (UAS) operating in the civil airspace. The work is framed within an Unmanned Traffic Management (UTM) system based on the U-space initiative.
Carlos Capitan +3 more
doaj +1 more source
Air and Space Law, 2019 The integration of civil unmanned aircraft systems (drones) into airspace has turned out to be a real challenge. Drones have difficulties in following many of the rules designed for manned aviation, because drones are plentiful and cheap, because they have no pilot on board, and because they are often flown at a very low altitude.
openaire +2 more sources