This article is dedicated to the study of the method of various term system analysis from term formation perspective. Herewith as the simple of analysis is studied aerospace terminology in Russian language. The main ways of term formation are divided into four groups: synthetic way, adoption, semantic metaphorization, analytic way. Each way and the nuances of its analysis are explained in detai...

What role do cultural factors play in the survival of a company that faces existential problems, especially if these problems relate to co-operation between organisations with different cultures? We try to provide some answers by looking at the decline of the Dutch aircraft manufacturer Fokker. In 1996 this company went bankrupt and among the causes of this event cultural factors rank high, at ...

Induction of cataracts by occupational exposure in flight crew has been an important topic of interest in aerospace medicine in the past five years, in association with numerous reports of flight-associated disease incidences. Due to numerous confounding variables, it has been difficult to determine if there is increased cataract risk directly caused by interaction with the flight environment, ...

In this paper, an overview of the techniques applied to AC electric propulsion field has been done. Actual study cases of electric ship propulsion schemes are considered. An impartial comparison between three-level converters versus two-level converter from the viewpoint of electric ship propulsion requirements has been done. Diodeclamped three-level converters using direct torque control (DTC)...

Various configurations and geometric scales of solar sails are compared with alternate advanced propulsion technologies. The study illuminates certain critical parameters such as the specific stiffness of the structure, a minimum area density, a minimum ‘smoothing stress’, and a need for long duration missions (e.g. > 100 days). As the thrust requirement increases, the geometric scale of the sa...

[Purpose] This study sought to ascertain whether, in hemiplegic patients, the effect of a wheelchair cushion to suppress pelvic posterior tilt when initiating wheelchair propulsion would continue in subsequent propulsions. [Subjects] Eighteen hemiplegic patients who were able to propel a wheelchair in a seated position participated in this study. [Methods] An adjustable wheelchair was fitted wi...

in this research the simulation of an air independent proton exchange membrane fuel cell (pemfc) propulsion system was taken into consideration. the system consists of several parts including pem fuel cell stack, metal hydride and liquid oxygen (lox) tanks, and also pre-heaters of oxygen and hydrogen gases along with other heat exchangers, to ensure proper operation of system. the heat recovery...

We have studied optical trapping and propulsion of red blood cells in the evanescent field of optical waveguides. Cell propulsion is found to be highly dependent on the biological medium and serum proteins the cells are submerged in. Waveguides made of tantalum pentoxide are shown to be efficient for cell propulsion. An optical propulsion velocity of up to 
6 µm/s on a waveguide with a width of...

Abstract This paper presents a control algorithm for ensuring the stable operation of 6 kW Hall thruster. The Japan Aerospace Exploration Agency is developing “wide-range” power processing unit (PPU) to thruster system, candidate all-electric satellites. PPU provides discharge oscillation, power, and current control. increments in loop are fixed, so digital controller does not need calculate th...

Abstract This paper presents an overview and preliminary system architecture evaluation results of the project SIENA developed under European Union Clean Sky 2 Program Thematic Topics. The ambition is to accelerate development novel aircraft propulsion technologies by identification that are scalable across different categories. One main tasks within this process aircraft-level various technolo...