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...

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...

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 ...

Abstract Aircraft Landing Planning is challenging because the inherently limited capacity of airport runways causes bottlenecks. This type planning involves different stakeholders (e.g., airlines, air traffic services providers, authorities, and passengers) faces various uncertainties take-off time variability, or wind speeds). study, conducted in collaboration with European Organization for Sa...

Large number of studies showed that landing with great impact forces may be a risk factor for knee injuries. The purpose of this study was to illustrate the different landing loads to lower extremity of both genders and examine the relationships among selected lower extremity kinematics and kinetics during the landing of a stop-jump task. A total of 35 male and 35 female healthy subjects were r...

[Purpose] The purpose of this study was to assess the sagittal angles and moments of lower extremity joints during single-leg jump landing in various directions. [Subjects] Eighteen male athletes participated in the study. [Methods] Participants were asked to perform single-leg jump-landing tests in four directions. Angles and net joint moments of lower extremity joints in the sagittal plane we...