Design and testing of a magnetic suspension and damping system for a space telescope

The basic equations of motion are derived for a two dimensional, three degree of freedom simulation of a space telescope coupled to a spacecraft by means of a magnetic suspension and isolation system. The system consists of paramagnetic or ferromagnetic discs confined to the magnetic field between two Helmholtz coils. Damping is introduced by varying the magnetic field in proportion to a velocity signal derived from the telescope. The equations of motion are nonlinear, similar in behavior to the one-dimensional Van der Pol equation. The computer simulation was verified by testing a 264-kilogram air bearing platform which simulates the telescope in a frictionless environment. The simulation demonstrated effective isolation capabilities for disturbance frequencies above resonance. Damping in the system improved the response near resonance and prevented the build-up of large oscillatory amplitudes

Anatomy transformed

This paper arose from exhibitions in Oxford and Dublin and comprises three experiments which look at the relationship between anatomy and art. In the first experiment, a passport photograph, photographic portrait and portrait in oils, all of the same sitter, show how artistic input transforms anatomy from a mere likeness into works of art. In the second, the reverse is true, as computer techniques render idealized old master images anatomically accurate. The third experiment addresses the biomechanical consequences of anatomical variation and shows that vehicular design is based on mean body shapes, and so it is the average, rather than the idealized, form that is safer in a collision

Older Women's Fears Of Violence: The Need for Interventions that Enable Active Ageing

Women’s fear of violence can impact negatively on their active participation in life. An ageing survey conducted with 2620 Australian respondents aged 50 to 90 years examined aspects of work, learning, social, spiritual and emotional status, health, vision, home, life events, demographics, and asked an open ended question about what being actively engaged in life meant. Ordinal regression was carried out on two dependent variables: wanting and needing to learn to discourage violence. Analyses found that as women’s age increased, those on lower incomes were more likely than others to say they needed to learn how to discourage violence against them. This paper investigates the variables associated with the findings - transport, finances, news media, home safety, and reduced social interactions. Results highlight the importance of understanding women’s fear in the context of personal and social issues, and the need to provide learning opportunities to improve safety and social engagement

Architecture as a craft: Architecture, drawing, model and position

Fifteen essays in 'Architecture as a craft' present a vision of the architectural discipline in which the essence is sought in craft itself. The book is based on the eponymous symposium that the Delft University of Technology held at the Faculty of Architecture from May 13 to June 4, 2009. The texts can be divided into three main groups: 1. this group examines the architect's position; 2. the second group looks at architectural composition and the resources that architects use to produce a design, such as models and drawings; 3. the last group discusses the meaning of materialisation in architectural thinking