The invariant manifolds of libration point orbits (LPOs) in the Sun-Earth/Moon system are used to construct lowenergy transfers from Low Earth Orbits (LEOs) to geosynchronous orbits. A maneuver is performed in LEO to insert onto a stable manifold trajectory of an LPO. The spacecraft travels to the host LPO and then follows an unstable manifold trajectory back to a geosynchronous orbit, where an...

In this paper, some results are provided for minimum time roll about velocity vector maneuvering with thrust-vectoring and aerodynamic control in effect. The mathematical model for attitude motions of the aircraft is developed. First order necessary conditions for optimality using Pontryagen principle is applied, and the existence of an extreme family of solutions for the maneuver is shown. Mul...

This study was performed following favorable results from a previous research, which studied the response of acute vestibular patients to the rotatory maneuver, to investigate the effects of the rotatory maneuver on chronic vestibular patients. In an attempt to normalize the patient’s directional preponderance (DP), and hence their vestibular symptoms, the study was designed to reduce the imbal...

This study was performed following favorable results from a previous research, which studied the response of acute vestibular patients to the rotatory maneuver, to investigate the effects of the rotatory maneuver on chronic vestibular patients. In an attempt to normalize the patient’s directional preponderance (DP), and hence their vestibular symptoms, the study was designed to reduce the imbal...

Here,we present a case of absent pulmonary valve syndrome operated with Le-Compte maneuver. Although Le-Compte maneuver was performed, endobronshial stent placement was carried out in order to relieve the airway obstruction.

INTRODUCTION Since anesthesia complications associated with unexpected difficult airway are potentially catastrophic, they should be avoided. The modified Mallampati test and jaw-thrust maneuver enable the identification of difficult airway. The aim of this study was to associate the modified Mallampati test and the jaw-thrust maneuver with laryngoscopy (Cormack-Lehane) in an attempt to identif...

The tightly coupled strapdown inertial navigation system (SINS)/global position system (GPS) has been widely used. The system observability determines whether the system state can be estimated by a filter efficiently or not. In this paper, the observability analysis of a two-channel and a three-channel tightly coupled SINS/GPS are performed, respectively, during arbitrary translational maneuver...

The Valsalva maneuver is a frequently used physiological test in evaluating the cardiovascular autonomic functions in human. Although a large pool of experimental data has provided substantial insights into different aspects of the mechanisms underlying the cardiovascular regulations during the Valsalva maneuver, so far a complete comprehension of these mechanisms and the interactions among the...

OBJECTIVES To compare the efficacy of the Epley maneuver with that of a placebo maneuver in patients presenting to the emergency department (ED) with benign positional vertigo (BPV). METHODS This was a prospective, randomized, single-blind placebo-controlled trial. Consecutive adult ED patients presenting to a university teaching hospital with BPV were randomized to treatment with either the ...