Search Results - "Almeida, Fernando Antônio de"

A historical review of the theory of gravity-assists in the pre-spaceflight era by Negri, Rodolfo Batista, Prado, Antônio Fernando Bertachini de Almeida

“…The gravity-assist manoeuvre is a technique in which a spacecraft changes its orbital energy and angular momentum by a close-approach with a celestial body…”
Get full text

Use of prescribed psychotropic drugs among medical students and associated factors: a cross-sectional study by Fasanella, Nicoli Abrão, Custódio, Clarissa Garcia, Cabo, Júlia Santos do, Andrade, Gabriel Sousa, Almeida, Fernando Antônio de, Pavan, Maria Valéria

“…BACKGROUNDThe worldwide prevalences of anxiety and depressive disorders are 3.6% and 4.4%, respectively. Among medical students, many studies have indicated…”
Get full text

Heuristic Technique for the Search of Interception Trajectories to Asteroids with the Use of Solar Sails by Meireles, Lucas Gouvêa, Prado, Antônio Fernando Bertachini de Almeida, de Melo, Cristiano Fiorilo, Pereira, Maria Cecília

“…With the advances of space-exploration technologies, a long-lasting concern is finally being addressed: the deflection of potentially hazardous objects (PHOs)…”
Get full text

Optimum, Suboptimal and Solar Sailing Orbital Maneuvers for a Spacecraft Orbiting the Earth by Meireles, Lucas Gouvêa, Gomes, Vivian Martins, Prado, Antônio Fernando Bertachini de Almeida, Melo, Cristiano Fiorilo de

“…The present research performs numerical studies to search for the best maneuvers, from the point of view of minimum time, to make adjustments in the semi-major…”
Get full text

Comparisons between the circular restricted three-body and bi-circular four body problems for transfers between the two smaller primaries by de Almeida Junior, Allan Kardec, de Almeida Prado, Antonio Fernando Bertachini

“…Important properties of the dynamics of a spacecraft can be obtained from the Circular Restricted Three Body Problem and the Bi-Circular Bi-planar Four Body…”
Get full text

Translation, cross-cultural adaptation and validation of the EPOCH-RRT questionnaire "Empowering Patients On Choices For Renal Replacement Therapy" for the Brazilian context by Rodrigues, Luciana Adorno Sattin, Almeida, Fernando Antonio de, Rodrigues, Cibele Isaac Saad

“…Chronic kidney disease (CKD) is a global public health problem. In Brazil, the incidence and prevalence rates of dialysis CKD progressively increase, but the…”
Get full text

Robust path-following for Keplerian orbits by Negri, Rodolfo Batista, de Almeida Prado, Antônio Fernando Bertachini

“…This work introduces a novel path-following control strategy inspired by the famous two-body problem, aiming to stabilize any Keplerian orbit. Utilizing…”
Get full text

Impact of a radiological protection campaign in emergency paediatric radiology: a multicentric observational study in Brazil by Oliveira Bernardo, Mônica, Morgado, Flávio, dos Santos, Alair Augusto Sarmet Moreira Damas, Foley, Shane, Paulo, Graciano, de Almeida, Fernando Antônio

“…Purpose To evaluate the impact of a paediatric radiological protection campaign, implemented in the emergency units of a healthcare provider network in Brazil…”
Get full text

Hypertension from the patient's perspective: contributions to the care offered by health professionals and self-care - a qualitative study by Leonardo, Felipe, Custódio, Clarissa Garcia, Lira, Débora Paulino de, Ferreira, Dayana de Oliveira, Pavan, Maria Valéria, Almeida, Fernando Antonio de

“…Hypertension is the most common disease in primary care settings. Only 30% of cases were adequately controlled. To analyze the knowledge and understanding of…”
Get full text

Satellite de-orbiting via controlled solar radiation pressure by Deienno, Rogerio, Merguizo Sanchez, Diogo, Prado, Antonio Fernando Bertachini de Almeida, Smirnov, Georgi

“…"First online: 07 June 2016" The aim of the present research is to study the use of solar radiation pressure to place a satellite in an orbit that makes it to…”
Get full text

Radiological protection in the perspective of health professionals exposed to radiation by Batista, Vinícius Martins Dias, Bernardo, Monica Oliveira, Morgado, Flávio, Almeida, Fernando Antonio de

“…To evaluate the knowledge of health professionals about radiological protection and to implement educational actions to promote a safe working environment for…”
Get full text

Celestial mechanics, spacecrafts, and 50th years of the first humans on the Moon by Gomes, Vivian Martins, de Mello, Cristiano Fiorilo, Macau, Elbert E. N., de Almeida Prado, Antonio Fernando Bertachini, Winter, Othon Cabo

“…Aerospace engineering is a relatively new topic in engineering. It deals with several aspects of activities related to space. It includes Astrodynamics, which…”
Get full text

Dynamics of Space Particles and Spacecrafts Passing by the Atmosphere of the Earth by Gomes, Vivian Martins, Golebiewska, Justyna, de Almeida Prado, Antonio Fernando Bertachini

“…The present research studies the motion of a particle or a spacecraft that comes from an orbit around the Sun, which can be elliptic or hyperbolic, and that…”
Get full text

Ground-based laser effect on space debris maneuvering by Formiga, Jorge Kennety Silva, dos Santos, Denilson Paulo Souza, de Almeida Prado, Antonio Fernando Bertachini, de Moraes, Rodolpho Vilhena, Diaz, Julian Arnaldo Avila

“…Space debris events are increasingly frequent where they are sufficiently dense that the use of low Earth orbit space has now reached the point under the…”
Get full text

Tension Control Law for Three-Dimensional Deployment of a Geostationary Space Solar Power Station by Tipan Salazar, Francisco Javier, Bertachini de Almeida Prado, Antonio Fernando

“…AbstractTo collect solar energy in outer space, Tethered Collecting Solar Power Satellite Systems have been proposed by several authors in the last years. A…”
Get full text

A Comparison of Averaged and Full Models to Study the Third-Body Perturbation by Solórzano, Carlos Renato Huaura, de Almeida Prado, Antonio Fernando Bertachini

“…The effects of a third-body travelling in a circular orbit around a main body on a massless satellite that is orbiting the same main body are studied under two…”
Get full text

On the use of a continuous thrust to find bounded planar trajectories at given altitudes in Low Earth Orbits by de Almeida, Allan Kardec, Piñeros, Jhonathan Orlando Murcia, Prado, Antonio Fernando Bertachini de Almeida

“…In this work, it is shown how a spacecraft equipped with a thrust and subjected to a drag force can be bounded at specific altitudes as function of the…”
Get full text

Deflecting an Asteroid on a Collision Course with Earth Using a Powered Swing-By Maneuver by Chagas, Bruno S., Prado, Antonio Fernando Bertachini de Almeida, Winter, Othon Cabo

“…The deflection of potentially dangerous asteroids has been treated with great intensity and has gained more and more attention in scientific research…”
Get full text

Lifetimes of an Exomoon Orbiting a Jupiter-Like Planet in a Double Star System with the Mass of the Sun by de Almeida Junior, Allan Kardec, Gomes, Vivian M., Prado, Antonio Fernando Bertachini de Almeida

“…The search for life outside Earth has been a popular topic for a long time in the scientific literature, but it gained more possibilities with the discovery of…”
Get full text

Use of the tethered swingby maneuver to reach the Haumea dwarf planet by Sukhanov, Alexander, Prado, Antonio Fernando Bertachini de Almeida

“…The asteroid tethered swingby maneuver (ATSM) is analyzed in this paper. The maneuver implies turn of the spacecraft velocity by means of a tether anchored to…”
Get full text