Bridging the cultures: architecture,models and computers in 1960s Cambridge

ABSTRACT

In the 1960s a unique research centre was founded in the Department of Architecture at the University of Cambridge. Before that date research in architecture was fragmentary and consisted largely of individual studies of topics in architectural history. Under the direction of Sir Leslie Martin, who had been appointed Professor of Architecture in 1956, a group of young architecture graduates embarked on a programme of research in the newly established centre for Land Use and Built Form Studies. Informed by the interest in the idea of the ‘model’ that was prevalent across the disciplines in Cambridge at this time and by using the power of the University Mathematical Laboratory’s ‘Titan’ mainframe computer, the group developed conceptual and mathematical models that operated across the range of architectural scales from building to city. This paper describes that work and sets it in the context of Leslie Martin’s role in reshaping architectural education in Britain.     

Land-Use Allocation in the Absence of Complete Market Values

This paper describes a method of land-allocation that can be used byplanners and other land managers in the face of market failure. The method integrates theland-allocation approach used in geographic information systems with that used in a generalizedassignment problem. Suitability scores, instead of market prices, are used in assigning competingland uses to individual parcels (pixels) of land. The method is illustrated using a hypotheticalexample involving three competing land uses within a region.     

The regulation of employment services: Private employment agencies and labour market policy

Public policy relating to the labour market has undergone significant change over recent years. These changes reflect demands for greater flexibility in the labour market, and respond to pressures of growing levels of unemployment and consequent exacerbation of divisions within the labour market. A conflict is apparent, however, in the mix of policies adopted. Accompanying moves towards a more ‘active’ style labour market policy has been a trend towards greater reliance on private means of delivery such that the dividing line between public (CES) and private employment agencies is becoming increasingly blurred. Evidence from a survey of private employment agencies and employers conducted in Brisbane in 1992/93 suggests that such a trend may reduce the capacity to regulate employment services and facilitate a commitment to employers’ interests at the expense of those of many entrants to the labour market.     

History and Policy Studies

This article deals with actual and potential contributions of history to policy studies. Some historians have attempted to influence specific policies through their writings, others have held policy-relevant positions in government agencies, while others have functioned in roles that have made them official preservers of our past. The authors discuss a number of ways in which history is relevant to policy studies-among them, the conception of history as a policy laboratory, as a source for perspective about the development of current policies, as a source of theoretically interesting rare or unique occurrences, and as a repository of values to which appeals can be made to justify current and proposed policies. Historians are becoming aware of the need for alternative careers to teaching in universities and this has led them to seek an increase in the number of policy-relevant positions for historians in government.     

Rates of dentine mineralization in permanent human teeth

Previous experimental studies have estimated linear rates of dentine formation in modern humans to be close to 4μm day⁻¹. In this study a method similar to that first adopted by Kawasaki, Tanaka and Ishikawa⁵ was used to estimate linear rates of dentine mineralization over a period of 1200 days in both the cusps and cervical regions of several permanent tooth types. All teeth were from the same individual. Rates in the cusps of teeth with the tallest crowns were estimated to be between 5 μm day⁻¹ and 6 μm day⁻¹. This is higher than previous estimates in permanent tooth crowns, although rates in the cusp of a first permanent molar, where cusps were less tall and cuspal dentine therefore less thick, were close to previous estimates of 4 μm day⁻¹. Despite this variation in cuspal rates, mineralization rates were linear in all cusps studied over a long period of time. Rates in the cervical region, either close to the enamel dentine junction or to the cement dentine junction, were estimated to be between 1.3 μm day⁻¹ and 1.5 μm day¹¹, much slower than reported previously. Rates in the mid-portion of the dentine, in both the lateral part of the crown and in the cervical one-third of the root, rose steadily to match rates in the cuspal region, but then slowed towards the pulp chamber. These data extend the findings of previous studies on permanent human dentine. They demonstrate a wide range of mineralization rates in permanent dentine and provide a more secure basis for judging different rates in different locations of different human tooth types.