Results 131 to 140 of about 33,171 (317)

The aerothermal environment and material response: A review [PDF]

open access: yes, 1974
Aerothermal environments are discussed with emphasis on the cold dense and warm atmospheres of Saturn and Uranus. The spectral distribution of the incident radiation flux is given for the Saturn nominal entry.
Nicolet, W. E.
core   +1 more source

What do established companies do to factor in sustainability into their business models?

open access: yesBusiness Strategy and the Environment, Volume 34, Issue 1, Page 19-38, January 2025.
Abstract This study examines the motivations for businesses to integrate sustainability into their business models (BMs) and how they can innovate those models to become more sustainable. The concept of business model innovation for sustainability (BMIfS) has emerged as a viable means to help companies innovate sustainable business models (SBMs ...
Bejtush Ademi   +2 more
wiley   +1 more source

Simple high-order Galerkin finite element scheme for the investigation of both guided and leaky modes in axially anisotropic planar waveguides [PDF]

open access: yes, 2003
A simple high-order Galerkin finite element scheme is formulated to compute both the guided and leaky modes of anisotropic planar waveguides with diagonal permitivity tensor.
Groesen, E. van   +2 more
core   +1 more source

First submillimeter observation of CO in the stratosphere of Uranus [PDF]

open access: yes, 2013
Context. Carbon monoxide (CO) has been detected in all Giant Planets and its origin is both internal and external in Jupiter and Neptune. Despite its first detection in Uranus a decade ago, the magnitude of its internal and external sources remains unconstrained. Aims. We targeted CO lines in Uranus in the submillimeter range to constrain its origin.
arxiv   +1 more source

Ionospheric Conductances at the Giant Planets of the Solar System: A Comparative Study of Ionization Sources and the Impact of Meteoric Ions

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract The dynamics of giant planet magnetospheres is controlled by a complex interplay between their fast rotation, their interaction with the solar wind, and their diverse internal plasma and momentum sources. In the ionosphere, the Hall and Pedersen conductances are two key parameters that regulate the intensity of currents coupling the ...
Noé Clément   +4 more
wiley   +1 more source

New Moons of Uranus and Neptune from Ultradeep Pencil-beam Surveys

open access: yesThe Astronomical Journal
We have conducted extremely ultradeep pencil-beam observations for new satellites around both Uranus and Neptune. Tens of images on several different nights in 2021, 2022, and 2023 were obtained, shifted, and added together to reach as faint as 26.9 and ...
Scott S. Sheppard   +6 more
doaj   +1 more source

Uranus science planning [PDF]

open access: yes, 1974
Recommendations for a 1979 Mariner Jupiter-Uranus mission are discussed with the possibility of launching the first outer planet atmospheric entry probe.
Moore, J.
core   +1 more source

High spectral resolution observations of Uranus' near-IR thermospheric $H_2$ emission spectrum using the IGRINS spectrograph during the 2018 and 2023 apparition [PDF]

open access: yes
Ground-based near-IR observations have revealed that Uranus anomalously hot upper atmosphere, detected by Voyager 2, has been steadily cooling. The observed $H_3^+$ and $H_2$ emission-line spectra probe Uranus' ionosphere and thermosphere, respectively.
arxiv   +1 more source

Outer planet mission guidance and navigation for spinning spacecraft [PDF]

open access: yes
The orbit determination accuracies, maneuver results, and navigation system specification for spinning Pioneer planetary probe missions are analyzed to aid in determining the feasibility of deploying probes into the atmospheres of the outer planets ...
Ellis, J., Paul, C. K., Russell, R. K.
core   +1 more source

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