FURTHER OBSERVATIONS ON THE STONE RUNS OF THE FALKLAND ISLANDS
THE LAST DISCUSSION ON THE STONE RUNS OF THE FALKLAND ISLANDS CRITICISED THE THEORY THAT SOLIFLUCTION WAS A SIGNIFICANT PROCESS IN THEIR EVOLUTION AND IT ADVOCATED THAT THEY EVOLVED IN SITU. THIS PAPER DESCRIBES MORPHOLOGICAL AND INTERNAL
CHARACTERISTICS OF THE STONE RUNS WHICH WERE IGNORED IN PREVIOUS ACCOUNTS, AND CONSIDERS THE SPATIAL RELATIONSHIPS OF THE RUNS WITH GLACIAL LANDFORMS, WITH OTHER SLOPE PHENOMENA AND WITH REMNANTS OF A REGOLITH OF CHEMICALLY ROTTED BEDROCK. IT IS CONCLUDED
THAT PROCESSES SIMILAR TO THOSE WHICH FORM SORTED STONE STRIPES IN PERIGLACIAL ENVIRONMENTS PROBABLY CREATED THE STONE RUNS, BUT THAT THE LATTER EVOLVED ON AN EXCEPTIONAL SCALE ON THE FALKLAND ISLANDS DURING THE PLEISTOCENE BECAUSE OF CLIMATIC, LITHOLOGICAL
A partir de sommes de variables aléatoires, on peut déterminer différentes propriétés des sommes de runs (ou séquences) d'un processus hydrologique donné. Exemples d'application donnés sur des processus indépendants et dépendants.
A Markov and runs analysis of drought in the central United States
The most common measure of drought, the Palmer Drought Severity Index (PDSI), is combined with the theory of runs in a Markov chain analysis. The A. analyzes the spatial pattern of severe and extreme drought for 41 climate divisions in the five
The short-run and long-run factor-market consequences of immigration to the United States
Approche de la théorie de la production pour évaluer l'impact de l'immigration sur les salaires domestiques et l'emploi aux Etats-Unis. Désagrégation et demande des facteurs de production. 123 aires métropolitaines, recensement de 1980. Formes
Généralités sur la géographie ; Géographie ; Idéologie ; Théorie
Evaluation de la portée des théories néoclassiques en géographie urbaine sous forme de conte mathématique basé sur les hypothèses et postulats chrétiens. En vis-à-vis, l'argumentation des théoriciens radicaux. Que peut devenir la ville? L'idéologie
Croissance démographique ; Etats-Unis ; Externalités ; Immigration ; Impact économique ; Marché du travail ; Migration ; Migration de travail ; Migration internationale ; Migration intérieure ; Théorie économique
Economic impact ; Economic theory ; Externalities ; Immigration ; Internal migration ; International migration ; Labour market ; Labour migration ; Migration ; Population growth ; United States of America
This paper discusses certain problems with the use of the production theory and public sector channels, and also describes the potential importance of other channels, as indicated for other countries and/or for the U.S. during other periods of time
. While these alternative channels may sometimes reinforce the two, they frequently run counter to them.
Présentation d'une méthode générale permettant de trouver la fonction de distribution exacte de la durée d'étiage la plus longue sur un échantillon fini de tout processus basé sur la théorie des séquences et la technique énumérative. Application aux
of experiments was run using small-scale physical models of braided rivers in a 3 m x 20 m flume. Sampling criteria for braid indices and their comparability were assessed using constant-discharge experiments. Sample hydrographs were run to assess the effect
from which measurements can be reliably made. They can also be related directly to bar theory for braided pattern development.
Analysis of conflicts in dynamical environmental systems via catastrophe theory in Energy problems and regional development.
Energie ; Environnement ; Gestion de l'environnement ; Géographie humaine ; Modèle ; Production ; Rareté ; Ressource naturelle ; Système économique ; Théorie des catastrophes
This paper addresses itself to long-term conflicting issues in environmental policy analysis. After a brief discussion of the new scarcity and its subsequent potential perturbations of our economic system in the long run, attention will be paid
to some elements of catastrophe theory which may be helpful in gaining insight into the future impacts of inertia and conflicts in environmental management. Next, a fairly simple model for integrating natural resources and production will be constructed so
as to illustrate the usefulness of catastrophe theory in economic-energy-environmental systems. The paper will be concluded with a brief judgement of using catastrophe notions in the social sciences.
Extinction-debt theory holds that following habitat destruction, some extant species in remnants of habitat are doomed to eventual extinction. A simulation that includes hierarchical competition, reproduction, dispersal, and mortality was run on two
Accumulation du capital ; Capitalisme ; Division du travail ; Emploi ; Espace ; Géographie humaine ; Localisation ; Localisation industrielle ; Main-d'oeuvre ; Population active ; Théorie ; Travail
Theories of interregional trade and theories of value
Commerce ; Commerce inter régional ; Commerce international ; Echange inégal ; Géographie humaine ; Heckscher-Ohlin ; Théorie de P. Sraffa ; Théorie de la valeur ; Théorie économique