Time and space scales for measuring urban growth

Measuring Growth with Vertical Scales

A vertical score scale is needed to measure growth across multiple tests in terms of absolute changes in magnitude. Since the warrant for subsequent growth interpretations depends upon the assumption that the scale has interval properties, the validation of a vertical scale would seem to require methods for distinguishing interval from ordinal. In taking up this issue, two different perspective...

Efficiently Measuring Bandwidth at All Time Scales

The need to identify correlated traffic bursts at various, and especially fine-grain, time scales has become pressing in modern data centers. The combination of Gigabit link speeds and small switch buffers have led to “microbursts”, which cause packet drops and large increases in latency. Our paper describes the design and implementation of an efficient and flexible end-host bandwidth measureme...

Measuring Economic Growth from Outer Space.

GDP growth is often measured poorly for countries and rarely measured at all for cities or subnational regions. We propose a readily available proxy: satellite data on lights at night. We develop a statistical framework that uses lights growth to augment existing income growth measures, under the assumption that measurement error in using observed light as an indicator of income is uncorrelated...

Hybrid Systems: Reasoning across Scales in Space and Time

Emergy Evaluation of Italian Agriculture Across Space and Time Scales

This paper evaluates in emergy terms the resource use and environmental performance of the Italian agricultural sector across levels, from local scale (olive, lemon and grape farms), through regional scale (Campania region) up to the national scale (whole Italy). The evolution over time (from 1985 to 2006) is also investigated to take into account how the demand for environmental support change...