A New Perspective about Moran's Coefficient: Spatial Autocorrelation as a Linear Regression Problem. Moran系数的新视角：空间自相关视为线性回归问题

The computation of Moran's index of spatial autocorrelation requires the definition of a spatial weighting matrix. The eigendecomposition of this doubly centered matrix (i.e., one that forces the sums of all rows and columns to equal zero) has interesting properties that have been exploited in various contexts: distribution properties of the Moran coefficient (MC), spatial filtering in linear models, generalized linear models, and multivariate analysis. In this article, this eigendecomposition is used to propose a new view of MC based on its interpretation in the simple context of linear regression. I use this interpretation to demonstrate the different properties of MC and also the inefficiency of this index in some situations involving simultaneous positive and negative spatial autocorrelation. I propose some new statistics and procedures for testing spatial autocorrelation, and conduct a simulation study to evaluate these new approaches.     

The transition of British Africa

At the turn of the century British literary historians and critics, such as Geikie, Sharp, and Thomas, studied the influence of environment on the works of novelists and poets. In particular, the concepts of literary geographers and a writer's country were developed. Earlier deterministic approaches have been modified and more recent studies by Drabble, O'Brien and Pocock have looked at the totality of influences of place on the work of various writers.     

Range of motion and energy cost of locomotion of the late medieval armoured fighter: A proof of concept of confronting the medieval technical literature with modern movement analysis

ABSTRACT

Study of technical, normative, and narrative medieval literature and of archaeological pieces allows the motor skills of armoured members of the aristocracy to be outlined but not quantified. The authors present novel data on the impact of wearing armour on both the freedom of movement and the energy cost of locomotion, and confront the results to systematic analysis of medieval written sources. An accurate harness replica realized in an informed archaeological experimental way, close to medieval material and manufacturing conditions, was used for the experiments. Measurements of the energy cost of locomotion in and out of armour were taken during walking and running on a treadmill. Gait analysis and range of motion of joints were performed with 3-D kinematics. The results indicated an increase in the energy cost of locomotion in slight excess to the added weight and for most movements studied reductions in the range of motion over the joint, potentially to the advantage of the wearer during combat. This proof of concept appears promising for further study in this field of scholarly endeavor.     

Political economy and social legislation in Germany,ca 1870–1890

Summary

This article examines the nature of academic political theory in Britain in the post-war period, examining in particular the degree to which theorists were able to mount normative theoretical arguments. Traditionally, commentators such as Brian Barry and Perry Anderson have argued that political theory in this period was largely dead between 1945 and 1970 due to the impact of positivism, but I argue this is mistaken for two main reasons. First, it fails to distinguish between the different forms that positivism took in the post-war era. Thus although it is true many theorists tended to claim that moral and political values could (or should) not be discussed rationally, their reasons for doing so varied considerably. For while theorists such as A. J. Ayer and T. D. Weldon justified their positions theoretically, with arguments drawn from behaviourist social science or innovations made in linguistic philosophy, others, such as Ralf Dahrendorf and Anthony Crosland, argued that it was the perceived success of post-war welfare states or the alleged failure of political ideologies that made traditional political theory irrelevant. Second, following on from this, I argue that delineating more accurately how positivism actually operated helps to explain how political theorists were able to pursue their discipline normatively—albeit that few reacted to all aspects of positivism. Thus if some (such as Karl Popper) were more concerned to insist that political philosophy had something to say in practice, others (such as Michael Oakeshott), reacted more strongly against the proposition that human behaviour can be understood purely causally. Finally, I examine the impact of ordinary language philosophy on post-war political theory, and argue that rather than simply damaging the cause of normative political theory by encouraging a myopic concentration on the linguistic analysis of particular moral and political concepts, over the longer term its effects were much more positive, since it helped to focus attention on the irreducibly normative dimension of political concepts.