More accurate attitude angles can make the control of four-rotor aircrafts more precise. Various filters have been adopted to get more precise attitude angles. However, so far there is no suitable analysis system to evaluate the performance of filters. In this paper, an analysis system has been designed which can get the realistic attitude angles directly and compare the processing results of f...

Aircraft flight deck synthetic vision systems (SVS) always provide a “clear day” view and hence have the potential to improve safety in commercial aviation. Approach, landing, and taxi operations will most readily profit from the SVS capabilities. A part-task simulation study provided data on pilot performance using a baseline and an SVS-equipped flight deck. One effect of adding the separate S...

This paper studies constrained relative attitude determination of a formation of two vehicles. A deterministic solution for the relative attitude between the two vehicles with line-of-sight observations between them and a common object observed by both vehicles is presented. The constraint may be either a planar constraint or a triangle constraint of the observed vectors. The difference between...

Background and Objectives: Abortion is one of the main causes of maternal mortality. The lack of knowledge of physicians and midwives about the abortion laws can lead to the deficiency of presenting accurate information to pregnant women, and consequently to increase unsafe abortions. The purpose of this study was to assess the relationship of knowledge and attitude towards legal abortion laws ...

This study explores the use of computers in business education and its impact on the performance of students. A controlled experimental study has been carried out to determine the differences in performance of students in a computer assisted mstruction (CAI) group with that of a control group. It investigates the relationship between performance and various student-specific characteristics such...

Marketing managers often use consumer attitude metrics such as awareness, consideration, and preference as performance indicators because they represent their brand’s health and are readily connected to marketing activity. However, this does not mean that financially focused executives know how such metrics translate into sales performance, which would allow them to make beneficial marketing mi...

For the improvement of accuracy and better faulttolerant performance, a global position system (GPS)/vision navigation (VISNAV) integrated relative navigation and attitude determination approach is presented for ultra-close spacecraft formation flying. Onboard GPS and VISNAV system are adopted and a federal Kalman filter architecture is used for the total navigation system design. Simulation re...