Transgenesis in numerous eukaryotes has been facilitated by the use of site-specific integrases to stably insert transgenes at predefined genomic positions (landing sites). However, the utility of integrase-mediated transgenesis in any system is constrained by the limited number and variable expression properties of available landing sites. By exploiting the nonstandard recombination activity e...

BACKGROUND An erect posture and greater knee valgus during landing have been implicated as anterior cruciate ligament injury risk factors. While previous research suggests coupling of knee and hip kinematics, the influence of trunk positioning on lower extremity kinematics has yet to be determined. We hypothesized that greater trunk flexion during landing would result in greater knee and hip fl...

To safely land after a jump or hop, muscles must be actively stretched to dissipate mechanical energy. Muscles that dissipate energy can be damaged if stretched to long lengths. The likelihood of damage may be mitigated by the nervous system, if anticipatory activation of muscles prior to impact alters the muscle's operating length. Anticipatory motor recruitment is well established in landing ...

Preliminary note Numerical simulation procedures for landing dynamics of large transport aircraft are briefly presented. Developed numerical procedures allow for determination of dynamic response of landing aircraft for different flight and touch-down parameters. A non-linear dynamic model of landing aircraft, which serves as a basis for computational procedures, is synthesised by modelling of ...

Landing is an important but understudied behavior that flying animals must perform constantly. In still air, insects decelerate smoothly prior to landing by employing the relatively simple strategy of maintaining a constant rate of image expansion during their approach. However, it is unclear whether insects employ this strategy when faced with challenging flight environments. Here, we tested t...

In this paper we describe two approaches for solving the problem of scheduling aircraft landing times. In this problem, the air traac controller must compute a landing time for each aircraft in the horizon, and must attempt to minimise costs whilst observing a number of hard constraints. The costs are associated with aircraft landing times varying from the preferred landing time. The hard const...

This paper presents a novel multi-sensor information fusion methodology for landing hazard assessment and avoidance. The focus of this research is to analyze hazard characteristics of a planetary surface using imagery data obtained in real-time during spacecraft orbit, descent, or landing. This information is used to enable a spacecraft to safely touchdown on a planetary surface during mission ...

The purpose of this paper is to focus on the landing technique during the visual approach, analyze the risk at landing and make instruction to avoid the risk especially for unexperienced pilots. Airline has adopted several dozen of ab initio pilots every year and they normally become captains after flying about ten years as co-pilot. It is necessary in co-pilot for airline to make flight operat...

1. The house fly shows landing reaction to an expanding visual stimulus or to a decrement of the environmental light level. The quantitative relationship between the dependence of landing reaction on expansion and on light level decrement is analyzed. 2. The different properties of the reactions at different light levels may be correlated with the two visual systems in Diptera and may be explai...

This paper describes the flight testing and evaluation of technologies for the autonomous landing of a Yamaha RMAX helicopter at non-cooperative sites without the aid of GPS. The Yamaha RMAX used for these flight trials has been modified to include stereo cameras, a scanning laser, and an avionics payload. Machine vision stereo range mapping is used to generate an accurate terrain representatio...