Une population semi-stable est une population qui, à chaque instant, coïncide avec la population stable correspondant aux conditions de mortalité et de fécondité du moment. L'A. montre que de telles populations existent, et qu'il n'y a pas
d'impossibilité à supposer qu'un état stable puisse être atteint immédiatement. Application des formules de l'état semi-stable à la population féminine du Mexique.
La dynamique des populations. Populations stables, semi-stables, quasi-stables
Analyse de régression ; Analyse démographique ; Dynamique des populations ; Démographie ; Espérance de vie ; Estimation ; Evolution démographique ; Mathématique ; Mortalité ; Population stable ; Reproduction de la population ; Statistique
Demographic analysis ; Demographic change ; Demography ; Estimation ; Life expectancy ; Mathematics ; Mortality ; Population dynamics ; Regression analysis ; Reproduction rate ; Stable population ; Statistics
Fécondité ; Géographie humaine ; Immigration ; Modèle démographique ; Population ; Population stable ; Théorie
Extension de la théorie des populations stables avec l'introduction d'un flux constant d'immigration. Dans ce cas, l'évolution de la population sera constante, linéaire ou exponentielle selon que le niveau de la fécondité est inférieur, égal ou
An appraisal of the velocity-reversal hypothesis for stable pool-riffle sequences in the River Severn, England
The literature in support of the hypothesis together with published adverse criticism is reviewed. These observations are substantiated by a detailed study of the hydraulic geometry of stable pool-riffle sequences in the River Severn, close
Spatial dynamics of populations with changing birth, death, and migration rates : a generalization of multiregional stable population theory
Généralisation à n'importe quelle population des modèles décrivant les populations stables y compris les populations multirégionales avec flux migratoires intérieurs.
Fractionation mechanism of stable isotope in evaporating water body
This study quantificationally analyses the interaction between evaporating water body and atmosphere, and the influences of different factors on the evaporation by probing into the fractionation mechanism of stable isotope as water body is vaporized
A review of various factors influencing the stable carbon isotope ratio of organic lake sediments by the change from glacial to post-glacial environmental conditions
Multiple stable states and models of riparian vegetation succession on the Animas River, Colorado
, a state-and-transition model, which recognizes the possibility of multiple stable states in vegetation, via an investigation of the influence of fluvial processes and landforms on variation in a mosaic of riparian vegetation patches of different ages
Stable isotope ratios of carbon in phytoliths as a quantitative method of monitoring vegetation and climate change
The purpose of this work is to explore the possibility of using the stable isotopic composition of carbon in phytoliths to reconstruct aspects of paleoenvironmental conditions. The basis for this approach is related to the influence of climate
L'A. décrit, à travers l'exemple de l'agglomération rouennaise, les multiples avantages du carroyage par rapport au découpage administratif de l'espace urbain. En effet, le carreau est une unité géographique stable dans le temps et l'espace, qui
The regional relationship between racehorse stables and horticulture farming in the eastern Tokyo metropolitan area. The role of horse manure from a racehorse training center
This paper describes the development of racehorse stables and the manure circulation in the eastern suburbs of Tokyo. The AA. make clear the sustainable factors by analyzing the spatial relationship between horse manure suppliers and users
The AA. examine stable and radiogenic isotopes of C and stable isotopes of O in carbonate sampled from gravel coatings and soil matrix in three Holocene soils from a semiarid region in Nevada. By comparing isotopic measurements with modeled stable
Stable isotopic evidence for latest Pleistocene and Holocene climatic change in north-central Texas
The AA. examine evidence for climatic change at the Aubrey Clovis site, north-central Texas, over the past 14,000 yr. The primary emphasis of this paper will be on stable isotopic evidence from pedogenic and lacustrine carbonates from the study site
Palaeoclimate signals as inferred from stable-isotope composition of ground ice in the Verkhoyansk Foreland, Central Yakutia
In this study, the AA. present stable-isotope data from ice-wedges of Weichselian and Holocene ages from the foreland of the Verkhoyansk Mountains, as well as from Central Yakutia, and discuss their palaeoclimatic implications.
Stable isotope stratigraphy of a late last interglacial speleothem from Rana, northern Norway
The AA. present high-resolution stable oxygen and carbon isotope records from a speleothem from northern Norway, giving details on climatic fluctuations from the late last interglacial and the last interglacial-glacial transition, as well
Contribution à l'étude du cumulus chaud subtropical par alizé stable
Malgré l'absence de phase glace et, par suite, d'effet Bergeron, les cumulus chauds, issus de la convection locale dans les régions tropicales soumises à un flux d'alizé stable, peuvent donner des précipitations abondantes, comparables à celles