Biomedical subjects

I Bracken

Publications and source records attributed to I Bracken.

8 recordsLinked to original sources

PubMed1995

Linkage of the 1981 and 1991 U.K. censuses using surface modelling concepts.

Problems involving the comparative analysis of data for the 1981 and 1991 U.K. censuses are explored. The authors note that "the integration of 1981 and 1991 data is far from straightforward because of changes in census geography and definitions, in the administration of the census, and in the format and nature of the data. It is explained how, by a further refinement of population surface modelling concepts, these two data sets can be transformed into a single, consistent geographical database independent of the two original and inconsistent zonal structures....The resulting models permit intercensal analysis with considerable spatial flexibility and a number of computational advantages. Illustration is made of the types of analysis that can be supported, and attention is drawn to the availability of the remodelled data to the academic community."

Censuses↗

PubMed1991

A surface model approach to small area population estimation.

The author applies a surface model approach to the estimation of small-area population and household characteristics. "The representation of population-related information by means of surface concepts offers a way to overcome many of the limitations of traditional, 'fixed' zone-based methods. The approach has the potential to give planners and policy-makers greatly improved flexibility in handling and interpreting spatially referenced data. One practical area of application is the estimation of population at local levels for which the underlying concepts and methods are discussed in this article."

Demography↗

PubMed1991

Techniques for modelling population-related roster databases.

"In this paper the refinement and application of a technique for the generation of surface models of population and related information are examined.... The resulting database facilitates a range of improved spatial analyses. Some of these are more flexible means of accomplishing conventional tasks, such as the computation of incidence rates and the estimation of population for nonstandard areal units. Additionally, surface concepts are able to support innovative techniques, such as the identification and characterization of discrete settlements. Applications are described which demonstrate the range of possible analyses." The technique is illustrated using data for the United Kingdom.

Demography↗

PubMed1989

The generation of spatial population distributions from census centroid data.

"Census data are commonly used in geographical analysis and to inform planning purposes, though at the disaggregate level the basis of enumeration poses difficulties. In this paper an approach to surface generation is described that offers the prospect of revealing an underlying population distribution from centroid-based data which is independent of zonal geography. It is suggested that this can serve a wide variety of analytical, cartographic, and policy purposes, including the creation of spatial indicators of economic and social conditions and enhancing the value of census data. The approach is illustrated by reference to an analysis of part of the valleys of South Wales, in the United Kingdom."

Censuses↗

PubMed1989

The generation of socioeconomic surfaces for public policymaking.

The development is explained of a technique to generate 'modeled' surfaces of census-type socioeconomic survey data that offer the potential to overcome many of the problems inherent in the analysis and presentation of such data in conventional area-based form. Potential benefits of the modeled surfaces include a level of resolution that arguably can provide a more finely focused spatial basis for the generation of a wide range of spatial indicators that can aid public policy making. This type of application requires that the method is set within a flexibly managed information framework and includes suitable tests for the reliability of the generated surfaces.

Demography↗

PubMed1987

Migration age profiles for local authority areas in England, 1971-1981.

"This paper is a report on continuing research on the application of age profiles in migration analysis. In particular, it is an update of previous work published in this journal with an analysis of 1981 Census data for local authority areas in England. The changes in migration patterns over the intercensal period from 1971 to 1981 are described." The focus is on internal migration

Age Factors↗

PubMed1983

Analysis of gross migration profiles in England and Wales: some developments in classification.

"In this paper [the authors] describe the development and application of two approaches to the analysis of age and sex specific interarea migration. The data relate to local authority areas in England and Wales. These approaches are developments of established migration profile-fitting and cluster analytic methods. The paper shows how these methods have been used to develop complementary classifications from which potentially valuable criteria for migration analysis can emerge. The work described is part of a wider project concerned with the development of methods to improve the official estimation of internal migration in England in the context of local area population forecasting."

Age Factors↗

PubMed1982

Estimation of migration profiles in England and Wales.

"Migration profiles by age have been increasingly used in the analysis of migration data, and a theoretical function has been developed by researchers at the International Institute for Applied Systems Analysis (IIASA). This paper refines the approach by applying the principles of maximum likelihood to the estimation of the coefficients for the function. This enhances the statistical basis and in particular enables [the authors] to carry out tests of similarity between different areas on the basis of the calibrated coefficients. The method is applied to 1971 Census data for the local authorities of England and Wales."

Age Factors↗