Heavy Weight Deflectometer (HWD) tests were routinely conducted on three Portland Cement Concrete (PCC) test items in the Federal Aviation Administration’s (FAA's) National Airport Pavement Test Facility (NAPTF) to verify the uniformity of the test pavement structures and to measure pavement responses during full-scale traffic testing. A six-wheel aircraft landing gear with dual-tridem configur...

The Aviation Safety Reporting System includes over a million confidential reports describing safety incidents. Natural language processing techniques allow for relatively rapid and largely automated analysis of large collections of text data. Meaningful interpretation of the results and further investigations by subject matter experts can follow. This article describes the application of struct...

Aircraft braking maneuvers are safety-critical on-ground motions that exhibit complex dynamics and significant dependence on system operating conditions. The fundamental interface between the aircraft ground is landing gear. Among gear components, shock absorbers may be subject to gas leakage during their lifetime, which an anomaly could compromise lateral stability properties of regimes found ...

In this report we present the multi-disciplinary work performed in the rst phase of the COHSY project concerning generation of models and analysis of hybrid systems { mathematical models including both continuous and discrete elements. The participants of the project were SAAB Military aircraft, Volvo aerospace, and VOAC hydraulics, as well as three departments from Link oping University: Comp...

abstract introduction: identifying factors which cause the high incidence of acl is of great importance .the anterior shear forces are the primary mechanism of load sustained on the acl. during exercise, the activity of muscles and position of lower limbs may increase or decrease the anterior shear force. the purpose of this study is to investigate the relationship between the activity level of...