In order to solve the problem of forced landing in emergency for Unmanned Aerial Vehicles (UAVs), a multiinformation based algorithm for selecting forced landing area by step is proposed. In order to extract the slowly varying edges and weak edges in an aerial image, this algorithm adopted improved edge detection method to detect landing area without obstacles. To select the detected safe areas...

Eight healthy male subjects were required to make speeded responses to the Manikin task and to complete a flight simulation instrument landing task during prolonged exposure to a partially oxygen-deficient environment (mild hypoxic hypoxia). The subjects were exposed, in a hypobaric chamber, to experimental conditions at altitudes of Sea Level, 6,000ft, 8,000ft, 10,000ft, and 14,000 ft. All sub...

1. The behaviours of monocular and binocular flies are compared with respect to the landing reaction. It is found that landing reaction is elicited through different mechanisms by stimulating the zones of single or of double vision: M onocular stim ulation in the field of single vision evokes reactions with both ipsilateral and contralateral legs; monocular stimulation in the field of double vi...

BACKGROUND Jump landing is a complex movement in sports. While competing and practicing, athletes frequently perform multi-planar jump landing. Anticipatory muscle activity could influence the amount of knee flexion and prepare the knee for dynamic weight bearing such as landing tasks. OBJECTIVES The aim of the present study was to examine knee muscle function and knee flexion excursion as at...

Many studies have found a strong coupling between selective attention and eye movements. The premotor theory of attention suggests that saccade preparation is directly responsible for such attentional shifts. While it has already been shown that the attentional shift is not directly coupled to the final stages of motor execution, it is currently unknown to what aspect of the earlier stages of s...

BACKGROUND It has been proposed that female athletes who limit knee and hip flexion during athletic tasks rely more on the passive restraints in the frontal plane to deceleration their body center of mass. This biomechanical pattern is thought to increase the risk for anterior cruciate ligament injury. To date, the relationship between sagittal plane kinematics and frontal plane knee motion and...

BACKGROUND AND PURPOSE The atypical walking pattern in children with spastic cerebral palsy is assumed to involve kinematic and morphological adaptations that allow them to move. The purpose of this study was to explore how the requirements of the task and the energy-generating and energy-conserving capabilities of children with cerebral palsy relate to kinematic and mechanical energy patterns ...

This paper handles a trajectory optimization of fixed wing aircraft perch landing assisted by thruster. The paper develops aircraft model and deals with six-degree-of-freedom motion for further understanding of dynamic phenomena of proposed landing method. The landing maneuver is described as an optimal control problem minimizing the fuel consumption with specified terminal landing conditions. ...

charm. In the summer of 1685, James II overcame invasions in the north and in the south. The invasion in the south had been led by the Duke of Monmouth, illegitimate son of Charles the second. Monmouth had landed in Dorset and had been immediately proclaimed King by his supporters. He had, however, obtained no following in Bristol or in Wiltshire. Monmouth was defeated in a battle at Sedgemoor ...