Digital Image Analysis (DIA) has been employed to characterize the time evolution of a bubble injected from a single orifice into a pseudo 2-dimansional gas-solid fluidized bed. The injected bubble diameter increased with the square root of time before detachment. During bubble free flight in the bed, its diameter remains approximately constant. The center of mass of the bubble increases with t...

The Compact Kinetic Energy Missile (CKEM) is currently being developed as the Army’s newest hypervelocity anti-tank missile. The project has recently transitioned from the Science and Technology Objective phase to the Advanced Technology Demonstration phase. Science and technology phase flight testing required the development of a miniature telemetry system for measuring the super sonic flight ...

We have investigated the pattern of metabolic changes during tethered flight with and without lift generation in the African fruit beetle Pachnoda sinuata. Two distinct metabolic phases occur during lift-generating flight. The first phase is characterised by a high rate of oxygen consumption and a rapid change in proline and alanine levels in the haemolymph and flight muscles and in glycogen le...

In-flight vibration measurements from the transmission of an OH-58C KIOWA are analyzed. In order to understand the effect of normal flight variation on signal shape, the first gear mesh components of the planetary gear system and bevel gear are studied in detail. Systematic patterns occur in the amplitude and phase of these signal components with implications for making time synchronous average...

Given the sequence of phases and flight modes that represent the flight plan of a commercial aircraft, the initial and final states, and a set of path constraints, we solve the multi-phase optimal control problem of finding control inputs, switching times between flight modes and the corresponding trajectory of the aircraft that minimizes fuel consumption. The aircraft in flight is modeled as a...

Abstract This paper presents a methodology for numerical assessment of the aviation safety performance military flight unit and its condition, taking into account human factor impact. The research is based on two interrelated groups indicators concerning condition each – pre-flight used during mission planning preparedness phase, in-flight linked to execution phase ordered. adaptive has potenti...

Even though neurofibromatosis ( NF) is not a rare neurological disorder, but there is few studies regarding  the relationship between  NF and psychological disorders. A 14 year old girl with NF type 1 associated  with multiple cerebral lesions was admitted in psychiatric ward due to restlessness , hypertalktiveness aggressive behavior, and flight of idea. Psychiatric diagnosis, based on DSM IV ...

This paper reviews the flight mechanics and control of birds and bird-size aircraft. It is intended to fill a niche in the current survey literature which focuses primarily on the aerodynamics, flight dynamics and control of insect scale flight. We review the flight mechanics from first principles and summarize some recent results on the stability and control of birds and bird-scale aircraft. B...