Results 11 to 20 of about 481,772 (339)

DI-5-Cuffs: Bone Remodelling and Associated Metabolism Markers in Humans After Five Days of Dry Immersion to Simulate Microgravity

open access: yesFrontiers in Physiology, 2022
Background: The dry immersion (DI) model closely reproduces factors of spaceflight environment such as supportlessness, mechanical and axial unloading, physical inactivity, and induces early increased bone resorption activity and metabolic responses as ...
Marie-Thérèse Linossier   +8 more
doaj   +1 more source

Predicting Marine In Situ Heat Flow Using a Geospatial Machine Learning Conformal Prediction

open access: yesGeochemistry, Geophysics, Geosystems, 2023
Heat flow measurements over the past decades have drastically increased in number. However, even with vast increases in measurements, large geospatial gaps exist, most notably across Earth's oceans.
J. H. Graw, W. T. Wood, B. J. Phrampus
doaj   +1 more source

Identification, Categorisation and Gaps of Safety Indicators for U-Space

open access: yesEnergies, 2020
Many civilian applications of commercial unmanned aircraft are being planned to operate in the years ahead. Several countries have developed their own framework to design the operation of unmanned aircraft and the different services that demand safe ...
Javier Alberto Pérez-Castán   +4 more
doaj   +1 more source

Contingency Management Concept Generation for U-Space System

open access: yes2022 Integrated Communication, Navigation and Surveillance Conference (ICNS), 2022
Contingency management in aviation is a vital concept that ensures safety, security, and efficiency in operations. To fully benefit from the envisioned Advanced Air Mobility system, the need of a structured and system-wide contingency planning will be even more important since the air transportation system paradigm will shift into a highly automated ...
Altun, Arinc Tutku   +4 more
openaire   +2 more sources

Index boundedness and uniform connectedness of space of the G-permutation degree

open access: yesApplied General Topology, 2021
In this paper the properties of space of the G-permutation degree, like: weight, uniform connectedness and index boundedness are studied. It is proved that: (1) If (X, U) is a uniform space, then the mapping π s n, G : (X n , U n ) → (SP n GX, SP n GU ...
R. B. Beshimov   +2 more
doaj   +1 more source

Unmanned Free Balloon Flight’s Integration into Unmanned Aircraft System Traffic Management

open access: yesActa Technica Jaurinensis, 2019
This paper describes and inspects unmanned aerial vehicle, unmanned aircraft system, unmanned aircraft system traffic management, light and medium unmanned free balloons.
Norbert Hegyi, János Jósvai
doaj   +1 more source

Slow solar wind acceleration through the middle corona: Spacecraft radio studies

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The “Middle Corona”, defined by recent consensus as the region spanning 1.5–6 solar radii (R⊙, heliocentric), is an important zone through which several structural and dynamic changes occur in coronal streamer regions. Among these is a regime change from
David B. Wexler   +3 more
doaj   +1 more source

Dimension of special μ-spaces [PDF]

open access: yes, 1980
K. Nagami in [5] called a space X a u-space if X is embedded in the countable product of paracompact σ-metric spaces. Especially he called X a cubic u-space if X is the conutable product itself of paracompact ..
Mizokami Takemi
core   +1 more source

Priority-Aware Conflict Resolution for U-Space

open access: yesElectronics, 2022
In the context of the future urban mobility airspaces, U-space lays the foundation for unmanned aircrafts to be integrated with conventionally manned traffic to offer a multitude of services to citizens and businesses, such as urban public transport, goods movement, parcel delivery, etc.
Jesús Jover   +2 more
openaire   +2 more sources

Drones for parcel and passenger transportation: A literature review [PDF]

open access: yes, 2020
Delivery drones and ‘air taxis’ are currently among the most intensely discussed emerging technologies, likely to expand mobility into the ‘third dimension’ of low-level airspace.
Biehle, Tobias   +2 more
core   +1 more source

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