نتایج جستجو برای: landing

تعداد نتایج: 9312  

Journal: :Journal of the American Mosquito Control Association 2002
Yoshikazu Shirai Hisashi Funada Kiyoshi Kamimura Taisuke Seki Masaaki Morohashi

The landing sites on the human body preferred by Aedes albopictus were examined. Five male volunteers wearing only shorts stood in a mosquito net enclosure containing 120 proboscis-amputated Ae. albopitus. In separate tests, 9 male volunteers and 1 female volunteer lay supine during the test. The number of mosquitoes landing on each site of the volunteer's body was counted, and after completion...

Journal: :Journal of sports science & medicine 2010
Li-I Wang Chin-Yi Gu Wei-Ling Chen Mu-San Chang

This study aimed to compare the kinematics and kinetics during the landing of hop-jump and step-close-jump movements in order to provide further inferring that the potential risk of ACL injuries. Eleven elite male volleyball players were recruited to perform hop-jump and step-close-jump tasks. Lower extremity kinematics and ground reaction forces during landing in stop-jump tasks were recorded....

2017
Chris Mills Maurice R. Yeadon Matthew T.G. Pain

This study investigated how changes in the material properties of a landing mat could minimise ground reaction forces (GRF) and internal loading on a gymnast during landing. A multi-layer model of a gymnastics competition landing mat and a subject-specific seven link wobbling mass model of a gymnast were developed to address this aim. Landing mat properties (stiffness and damping) were optimise...

Objectives: The results of a few studies about the effects of ankle brace on muscles function during the performance of different tasks are contradictory. Moreover, the effect of brace on the co-contraction of ankle muscles is undiscovered. Therefore, the present study investigated the effect of brace usage on the ankle muscles activity and co-contraction during single-leg landing. Methods: Fi...

ژورنال: Physical Treatments 2018

Purpose: This study aimed to investigate the effect of genu varum abnormality on the activity of the anterior leg calf muscle during single-leg jump-landing task.  Methods: A total of 28 male students of Physical Education (Mean±SD age: 21.53±1.65 y, weight: 66.67±7.15 kg, height: 173.38±4.54 cm) were assigned into the genu varum (n=14) and normal knee (n=14) groups. Their level of activity of...

Journal: Physical Treatments 2022

Introduction: Dynamic knee valgus and poor technique during landing are not only key risk factors for lower extremity injuries especially knee injury, it also can reduce performance. Sportsmetrics soccer training is one of the successful knee injury prevention and enhancement performance protocols in female soccer players. But, the effect of Sportsmetrics soccer training has not been investigat...

Journal: :Journal of applied biomechanics 2009
Niell Elvin Alex Elvin Cornie Scheffer Steven Arnoczky Edwin Dillon P J Erasmus

The etiology of patellar tendinopathy (jumper's knee) has been attributed to a significant increase in patellar tendon torques associated with jumping. While some investigators have suggested that patellar tendon torques are greater during takeoff, little is known about the relative magnitudes of patellar tendon torques during takeoff and landing. We hypothesized that peak patellar tendon torqu...

2007
M. L. Urquhart M. T. Mellon

Introduction: With NASA’s return to the Moon, the determination of safe landing sites for future robotic and human missions is crucial, and rock abundance will be important criteria for landing site selection. Thermal inertias derived from remote sensing in the thermal infrared is a powerful technique for assessing rock abundance for the purpose of landing site selection on Mars [1,2]. Rocks a ...

1995
J. Abela

In this paper we describe two approaches for solving the problem of scheduling aircraft landing times. In this problem, the air tra c 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...

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