Buscar
Mostrando ítems 11-20 de 270
Otimização de manobras orbitais para remoção de detritos espaciais
(Universidade Estadual Paulista (Unesp), 2022-02-10)
Progress in space and satellite research is of great importance in meteorology, telecommunications, aerial image processing of the Earth and in other diverse fields. Equipment used for such purposes has a certain useful ...
Passive ultrasonic irrigation provides less debris after post space preparation
(2019-05-01)
Objective: The present study evaluated the residues (de-bris) incidence in dentin fiber post space submitted to ir-rigation protocols using distilled water (DW), 2.5% sodium hypochlorite (HS), 2.5 % sodium hypochlorite and ...
Rendezvous and Quasi-Rendezvous Maneuvers with Space Debris
(2017-10-25)
Rendezvous maneuvers are very useful in space missions operations. The encounters between spacecraft, between a spacecraft and a space debris, between a probe and a celestial body, between a spacecraft and a nearby object ...
Equações de Clohessy-Wiltshire: modelo linear para variação de massa nas manobras evasivas de veículos espaciais
(Universidade Estadual Paulista (Unesp), 2018-04-17)
Detritos espaciais (DE) são objetos que possuem altas velocidades e são capazes de inviabilizar o sucesso de missões espaciais, caso venham a colidir com veículos espaciais, além de colocar em risco a segurança dos ...
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil
(2021-01-01)
Debris flows represent great hazard to humans due to their high destructive power. Understanding their hydrogeomorphic dynamics is fundamental in hazard assessment studies, especially in subtropical and tropical regions ...
Evasive Maneuvers in Space Debris Environment and Technological Parameters
(Hindawi Publishing Corporation, 2012-01-01)
We present a study of collisional dynamics between space debris and an operational vehicle in LEO. We adopted an approach based on the relative dynamics between the objects on a collisional course and with a short warning ...
Evasive Maneuvers in Space Debris Environment and Technological Parameters
(Hindawi Publishing Corporation, 2012-01-01)
We present a study of collisional dynamics between space debris and an operational vehicle in LEO. We adopted an approach based on the relative dynamics between the objects on a collisional course and with a short warning ...
Post space debridement in oval-shaped canals: The use of a new ultrasonic tip with oval section
(ELSEVIER SCIENCE INC, 2008)
This study evaluates the effect on post space debridement in oval-shaped canals of an experimental ultrasonic tip with oval section (Satelec) compared with a circular ultrasonic tip (KaVo). Thirty teeth with an oval-shaped ...