Prijavno okno

Modified Moran's I for Small Samples

Geographical analysis - Pet., 05/12/2017 - 09:10

The most common indicator used to measure spatial dependence is Moran's I proposed by statistician Patrick A. P. Moran in 1950. The index is simple to use and applies the principle of the Pearson correlation coefficient, although it incorporates a proximity measure between elements. However, Moran's I tends to underestimate real spatial autocorrelation when the number of locations are few. This study aims to present a modified version of Moran's I that can measure real spatial autocorrelation even with small samples and check for spatial dependence.

The Old and the New: Qualifying City Systems in the World with Classical Models and New Data

Geographical analysis - Pet., 05/12/2017 - 08:50

Zipf's rank-size rule, lognormal distribution, and Gibrat's urban growth models are considered as summarizing fundamental properties of systems of cities. In this article, they are used as statistical benchmarks for comparing the shapes of urban hierarchies and evolutionary trends of seven systems of cities in the world including BRICS, Europe, and United States. In order to provide conclusions that avoid the pitfalls of too small samples or uncontrolled urban definitions, these models are tested on some 20,000 urban units whose geographically significant delineations were harmonized in each country over 50 years between 1960 and 2010. As a result, if the models appear not always statistically valid, their usefulness is confirmed since the observed deviations from empirical data remain limited and can often be interpreted from the geohistorical context of urbanism proper to each world region. Moreover, the article provides new free software which authorizes the reproducibility of our experiments with our data bases as well as with complementary data.

Teren GTP jutri

Terenske vaje - Thu, 05/11/2017 - 21:01
Kategorije: Novo na oglasni deski

Politics of the Anthropocene: Formation of the Commons as a Geologic Process

Antipode A Radical Journal of Geography - Thu, 05/11/2017 - 11:05
Abstract

In the Anthropocene humanity acquires a new collective geologic identity. There are two contradictory movements in this Anthropocenic thought; first, the Anthropocenic trace in the geologic record names a commons from below insomuch as humanity is named as an undifferentiated “event” of geology; second, the Anthropocene highlights the material diversities of geologic bodies formed through historical material processes. This paper addresses the consequences of this geologic subjectivity for political thought beyond a conceptualization of the commons as a set of standing reserves. Discourses of limits and planetary boundaries are contrasted with the exuberance and surplus of fossil-fuelled energy. Drawing on the political economy of Georges Bataille and the material communism of Maurice Blanchot, I argue for the necessity of a political aesthetics that can traverse the difference between common and uncommon experience in the formation of an Anthropocene commons.

Vabilo na delavnico - bonton

Obvestila - Wed, 05/10/2017 - 07:15
Kategorije: Novo na oglasni deski

GU - ILC KLUN, 9.5.2017

Govorilne ure - Tue, 05/09/2017 - 08:48
Kategorije: Novo na oglasni deski