Results 1 to 10 of about 1,047,720 (247)
Orbital debris–debris collision avoidance [PDF]
Advances in Space Research, 2011 We focus on preventing collisions between debris and debris, for which there is no current, effective mitigation strategy. We investigate the feasibility of using a medium-powered (5 kW) ground-based laser combined with a ground-based telescope to prevent collisions between debris objects in low-Earth orbit (LEO).
Mason, James +3 more
openaire +3 more sources
Development of an open source Debris Flow Simulator for “Sabo” (DFSS) [PDF]
E3S Web of Conferences, 2023 We report the development of an open source “Debris Flow Simulator for Sabo” (DFSS). DFSS consists of three models corresponding to three geomorphological regions (mountain hillside slopes, mountain-to-plain river channels, and lower plains).
Shimizu Takeshi +2 more
doaj +1 more source
Debris development in fretting contacts – Debris particles and debris beds [PDF]
Tribology International, 2020 In this study, the formation and destruction of compacted beds of oxidized debris particles are investigated. Fretting tests of steel specimens were conducted, employing a cylinder-on-flat geometry with displacement amplitude being varied. The debris was examined, both in the form of the debris beds and in the form of loose debris; together, these were
Kirk, A.M. +3 more
openaire +1 more source
Reconstruction of debris flow in the Gerkhozhan-Su river valley based on the chain modeling [PDF]
E3S Web of Conferences, 2023 The paper presents the reconstruction of the most catastrophic debris flows in the Gerkhozhan-Su river valley (North Caucasus, Russia) based on a chain of mathematical models.
Iudina (Kurovskaia) Viktoriia +4 more
doaj +1 more source
Risk assessment in the North Caucasus ski resorts [PDF]
Natural Hazards and Earth System Sciences, 2016 Avalanches pose a significant problem in most mountain regions of Russia. The constant growth of economic activity, and therefore the increased avalanche hazard, in the North Caucasus region lead to demand for the development of large-scale avalanche ...
A. Y. Komarov +3 more
doaj +1 more source
A 36 cm robotic optical telescope: Equipment and software
Frontiers in Astronomy and Space Sciences, 2022 The paper describes an optical telescope system and control software for robotic observation of space debris. The telescope has a main aperture of 355 mm, adopts the optical design scheme of primary focus with a large field of view, and is equipped with ...
Jian Sun +9 more
doaj +1 more source
AN APPLICATION OF RAINFALL THRESHOLD FOR SEDIMENT RELATED DISASTER IN MALAYSIA, ISSUES AND CHALLENGES [PDF]
Journal CleanWAS, 2022 Sediment related disaster is the most significant natural disaster in Malaysia and many countries in this world from the perspective of magnitude, damage and loss to human life and infrastructure as well as disruption to socio-economic activities. Debris,
Sandra Ligong +4 more
doaj +1 more source
Ecotoxicology and Environmental Safety, 2021 Alkyl-PAHs are the predominant form of PAHs in crude oils which are supposed to demonstrate different toxicities compared to non-alkyl PAHs. Little information is available about the toxicity of alkyl-PAHs on marine Artemia.
Yi Cong +6 more
doaj +1 more source
Frontiers in Marine Science, 2022 Heavy metal (HM) pollution in the marine environment has been of concern for decades. The potential impact of HMs carried by emerging marine pollutants such as microplastics (MPs) has attracted attention only in recent years.
Yi Cong +14 more
doaj +1 more source
Satellite laser ranging at ultra-high PRF of hundreds of kilohertz all day
Frontiers 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