Results 11 to 20 of about 1,075,136 (370)
Planetary systems with forces other than gravitational forces [PDF]
, 2022 A discrete and exact algorithm for obtaining planetary systems is derived in a recent article (Eur. Phys. J. Plus 2022, 137:99). Here the algorithm is used to obtain planetary systems with forces different from the Newtonian inverse square gravitational forces.
arxiv +1 more source
On Populism, Planets, and Why Concepts Should Precede Definitions and Theory-Seeking
Sociologica, 2019 Despite its remarkable growth in recent years, the study of populism has long suffered from the lack of a comprehensive theory about its causes, development, and outcomes.
Takis S. Pappas
doaj +1 more source
The record‐breaking heat wave of June 2019 in Central Europe
Atmospheric Science Letters, 2020 After being hit by several devastating heat waves in recent years, Europe experienced an exceptionally hot June in 2019 again. This June is the hottest one on record over Central Europe both in a monthly‐mean sense and in terms of the number of extremely
Peiqiang Xu +4 more
doaj +1 more source
Normalized angular momentum deficit: A tool for comparing the violence of the dynamical histories of planetary systems [PDF]
A&A 636, A53 (2020), 2020 Population studies of the orbital characteristics of exoplanets in multi-planet systems have highlighted the existence of an anticorrelation between the average orbital eccentricity of planets and the number of planets of their host system, that is, its multiplicity.
arxiv +1 more source
A Bayesian Monte Carlo assessment of orbital stability in the late stages of planetary system formation [PDF]
, 2022 The final orbital configuration of a planetary system is shaped by both its early star-disk environment and late-stage gravitational interactions. Assessing the relative importance of each of these factors is not straightforward due to the observed diversity of planetary systems compounded by observational biases.
arxiv +1 more source
A new paradigm of governance for a carbon-pricing system [PDF]
, 2016 Throughout its life, the United Nations has played a pioneering role in the world of ideas. COP21 – also known as Paris 2015 – shows the path for the United Nations to establish a new governance that will enforce the compliance of a new planetary carbon ...
Berezin, A. +2 more
core +1 more source
A new metric to quantify the similarity between planetary systems - application to dimensionality reduction using T-SNE [PDF]
A&A 624, A45 (2019), 2019 Planet formation models are now often considering the formation of planetary systems, with more than one planet per system. This raises the question of how to represent planetary systems in a convenient way, (e.g. for visualisation purpose) and how to define the similarity between two planetary systems, for example to compare models and observations ...
arxiv +1 more source
Contrast analysis between the trajectory of the planetary system and the periodicity of solar activity [PDF]
Annales Geophysicae, 2017 The relationship between the periodic movement of the planetary system and its influence on solar activity is currently a serious topic in research. The kinematic index of the planet juncture index has been developed to find the track and variation of
W. Sun +9 more
doaj +1 more source
International Astronomical Union Colloquium, 1999 AbstractThe past decade brought direct evidence of the previously surmised exoplanetary systems. A variety of planetary system types exist those around pulsars, around both young and old main-sequence stars (as evidenced by planetesimal disks of the Beta Pictoris-type), and the mature giant exoplanets found in radial velocity surveys.
openaire +1 more source
Machines, 2023 Mesh phasing has a dramatic impact on the static and dynamic behaviours of planetary gear systems. This research investigates the coupled phase-tuning mechanism of two-stage planetary gear systems and the corresponding relationship with the coupled ...
Pengfei Yan +4 more
doaj +1 more source