Universal tracking control is investigated in the context of a class S of M -input, M output dynamical systems modelled by functional differential equations. The class of systems encompasses a wide… (More)

Universal tracking control is investigated in the context of a class S of M -input, M -output dynamical systems modelled by functional differential equations. The class encompasses a wide variety of… (More)

An adaptive servomechanism is developed in the context of the problem of approximate or practical tracking (with prescribed asymptotic accuracy), by the system output, of any admissible reference… (More)

For linear, square, multi-input–multi-output, minimum-phase, relative-degree one or two systems, proportional output feedback controllers are studied. In particular, we show that derivative feedback… (More)

How do we recognize when an answer is “right”? This is a question that has bedevilled the use of computer systems in mathematics (as opposed to arithmetic) ever since their introduction. A computer… (More)

We consider computer aided assessment (CAA) of mathematics in which a student provides an answer in the form of a mathematical expression. A common a ppro ch is for CAA system implementors to adopt a… (More)

Assessment is a key component of all educational systems, and automatic online assessment is becoming increasingly common for formative work in mathematics. This paper reports an investigation of the… (More)

In this paper we report the results of an experiment designed to test the hypothesis that when faced with a question involving the inverse direction of a reversible mathematical process, students… (More)

In this paper, we investigate computer algebra based assessment of mathematics online, with a focus on undergraduate students. Introducing a computer algebra system to assist in marking allows a… (More)