The Interacting Multiple Model (IMM) estimator is a suboptimal hybrid filter that has been shown to be one of the most cost-effective hybrid state estimation schemes. The model of hybrid system and the IMM algorithm, initially proposed by Blom, may serve as a basis for synthesis of more efficient filters for tracking maneuvering aircraft. In this paper we present a number of specific features o...

A major challenge facing system designers is to ensure that a system that has been successfully evaluated in the laboratory will be successfully fielded. Off-nominal testing, in which unexpected conditions are evaluated, is proposed as a method to meet this challenge. Off-nominal testing allows for increased understanding of the humanmachine system under evaluation, may uncover design issues th...

This paper describes how the practical sessions of the Digital Systems Laboratory within the Computer Science Degree have been adapted to allow a visually impaired student to take part in the practical sessions. Regular students use a computer--aided design tool (OrCAD) for digital design in their practical assignments. This work shows how the use of special instrumentation allows visually impa...

Information systems (IS) research has been long concerned with improving task-related performance. The concept of fit is often used to explain how system design can improve performance and overall value. So far, the literature has focused mainly on performance evaluation criteria that are based on measures of task efficiency, accuracy, or productivity. However, nowadays, productivity gain is no...

This paper discusses the validation of design methods. The challenges and opportunities in validation are illustrated by drawing an analogy to medical research and development. Specific validation practices such as clinical studies and use of models of human disease are discussed, including specific ways to adapt them to engineering design. The implications are explored for three active areas o...

dear editor program directors need to evaluate educational programs to ensure their quality (1). the results of a survey conducted in tehran university of medical sciences (tums) in early 2012 showed that program evaluation was not an established process in the majority of schools. it was at best a stand-alone project focusing on a single course or a particular component of it with no structure...

The contribution of this paper to the space transportation system field is to select promising Reusable Launch Vehicle (RLV) concepts by using a formal evaluation procedure. The vehicle system is divided into design features. Every design feature can have alternative characteristics. All combinations of design features and characteristics are compared pairwise with each other. The innovation an...