We address the heliocentric in-orbit repositioning problem of an E-sail-based spacecraft that covers a circular parking orbit given radius, with assumption propulsive acceleration is directed along Sun-spacecraft line. According to recent literature, analysis exploits possibility reducing mathematical dynamics equivalent nonlinear oscillator single degree freedom. The analytical expression traj...

Background: The measure of the maximal expiratory pressure (MEP) has some contraindications, as it is believed that the responses obtained in this measure are similar to the Valsalva maneuver (VM). Objective: The main purpose of this study was to evaluate the heart rate responses (HR) during the MEP and the VM measures in healthy young men into different postures aiming to identify whether and ...

BACKGROUND Clearing subglottic secretions has been proved to reduce ventilator-associated pneumonia. A manual method named the rapid flow expulsion maneuver was developed to clear subglottic secretions. This study evaluates its safety and effectiveness and analyzes the influential factors. METHODS This study was composed of 2 parts. In an in vitro study, secretions were instilled directly to ...

IMPORTANCE Imparting surgical change to the nasal tip remains one of the most challenging aspects of rhinoplasty. The surgeon must assess the tip preoperatively and execute the necessary maneuvers to impart the desired change. OBJECTIVE To assess nasal tip resistance to compression in a cadaveric model before and after specific rhinoplasty maneuvers using a novel method. DESIGN, SETTING, AN...

Downbeat nystagmus (DBN) observed in head-hanging positions, may be of central or peripheral origin. Central DBN positions is mostly due to a disorder the vestibulo-cerebellum, whereas usually attributed canalolithiasis an anterior semicircular canal. Here, we describe atypical case patient who, after head trauma, experienced severe and stereotypic vertigo attacks being placed various positions...

To perform the orbital maneuvers, a software that calculates an optimal maneuver is developed. This method will be used as a reference for comparison and analises of the suboptimal methods to be used on board. This method id based on an analytical development that generate equations that can be computed in a shorter time, allowing real time applications. Key-Words: Orbital maneuvers, low thrust...