Results 21 to 30 of about 499,982 (305)

Satellite laser ranging at ultra-high PRF of hundreds of kilohertz all day

open access: yesFrontiers in Physics, 2022
Satellite laser ranging (SLR) had been operated at a pulse repetition frequency (PRF) from ∼10 Hz to 10 kHz; the ultra-high PRF of SLR (UH-SLR) is a trend of development.
Mingliang Long   +9 more
doaj   +1 more source

The fast debris evolution model [PDF]

open access: yes, 2008
The ‘Particles-in-a-box’ (PIB) model introduced by Talent (1992) removed the need for computer-intensive Monte Carlo simulation to predict the gross characteristics of an evolving debris environment.
G.G. Swinerd   +7 more
core   +1 more source

Genetic Algorithm for Space Debris and Space Objects Attitude Motion Reconstruction Through Optical Measurements [PDF]

open access: yes, 2023
Space debris has recently become a major problem in the planning and execution of space missions. Due to the recent widespread placement of satellite mega- constellations in Low Earth Orbits (LEO), where most of the catalogued debris is located, the need
Shariar Hadji Hossein   +8 more
core  

Debris cover and surface melt at a temperate maritime alpine glacier: Franz Josef Glacier, New Zealand [PDF]

open access: yes, 2012
Melt rates on glaciers are strongly influenced by the presence of supraglacial debris, which can either enhance or reduce ablation relative to bare ice.
Brook, Martin S.   +5 more
core   +1 more source

Human Population Density is a Poor Predictor of Debris in the Environment

open access: yesFrontiers in Environmental Science, 2021
There have been a variety of attempts to model and quantify the amount of land-based waste entering the world’s oceans, most of which rely heavily on global estimates of population density as the key driving factor.
Qamar Schuyler   +10 more
doaj   +1 more source

A distributed energy-balance melt model of an alpine debris-covered glacier [PDF]

open access: yes, 2014
Distributed energy-balance melt models have rarely been applied to glaciers with extensive supraglacial debris cover. This paper describes the development of a distributed melt model and its application to the debris-covered Miage glacier, western ...
Kirkbride, M.   +23 more
core   +1 more source

Satellite Orbit Prediction Using Big Data and Soft Computing Techniques to Avoid Space Collisions

open access: yesMathematics, 2021
The number of satellites and debris in space is dangerously increasing through the years. For that reason, it is mandatory to design techniques to approach the position of a given object at a given time.
Cristina Puente   +3 more
doaj   +1 more source

A Preliminary Analysis of the Wear Pathways of Sliding Contacts on Temporomandibular Joint Total Joint Replacement Prostheses

open access: yesMetals, 2021
In the last years, several materials and design have been assessed in an attempt to improve the mechanical performance of temporomandibular joint total joint replacement (TMJ TJR) prostheses.
Henrique Pinto-Borges   +5 more
doaj   +1 more source

Current Problems and Challenges in International Space Law: Legal Aspects [PDF]

open access: yesAdvanced Space Law, 2020
The article is devoted to the study and research of contemporary legal issues in the field of international space law. Today we are witnessing the rapid and unstoppable development of the space industry.
Inesa Kostenko
doaj   +1 more source

A comparison of glacier melt on debris-covered glaciers in the northern and southern Caucasus [PDF]

open access: yes, 2011
The glacier coverage in the Caucasus Mountains underwent considerable changes during the last decades. In some regions, the observed reduction in glacier area is comparable to those in the European Alps and the extent of supra-glacial debris increased on
W. Hagg   +13 more
core   +1 more source

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