نتایج جستجو برای: population growth rate

تعداد نتایج: 2249231  

Journal: :People and place 1998
R Kippen P Mcdonald

This article reviews the role of migration in determining population size in Australia, and suggest ways of achieving a stationary population, or zero population growth (ZPG), when fertility is below replacement. There is a narrow range of feasible options. It is argued that achievement of ZPG is feasible only with net migration of 60,000-100,000 annually and with a fertility rate of 1.65-1.8...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد - دانشکده علوم اجتماعی 1392

this study aims to investigate value conflicts between mothers and their daughters among families and influential factors on this conflict in yazd city. this study adopted a survey method and a questionnaire was used that its validity through construct validity (factor analysis) and its reliability by cronbach alpha were measured. the population of this study consists of all yazdian families th...

2017
Jonathan Andersson Sonja Radosavljevic

Human activity and other events can cause environmental changes to the habitat of organisms. The environmental changes effect the vital rates for a population. In order to predict the impact of these environmental changes on populations, we use two different models for population dynamics. One simpler linear model that ignores environmental competition between individuals and another model that...

2012
Milind M. Rao K. L. Preetish

Logistic functions are good models of biological population growth. They are also popular in marketing in modelling demand-supply curves and in a different context, to chart the sales of new products over time. Delays being inherent in any biological system, we seek to analyse the effect of delays on the growth of populations governed by the logistic equation. In this paper, the local stability...

Journal: :nursing and midwifery studies 0
farzaneh saberi trauma nursing research center, nursing and midwifery faculty, kashan university of medical sciences, kashan, ir iran; trauma nursing research center, nursing and midwifery faculty, kashan university of medical sciences, kashan, ir iran. tel: +98-36155540021, fax: +98-36155546633

2012
Hiroaki Sasaki

This paper builds a small-open-economy, non-scale-growth model with negative population growth and investigates the relationship between trade patterns and per capita consumption growth. Under free trade, if the population growth rate is negative and its absolute value is small, the home country becomes an agricultural country. Then, the long-run growth rate of per capita consumption is positiv...

Journal: :Proceedings of the Royal Society B: Biological Sciences 2013

1997
J F

The size stability of natural populations indicates that natality and mortality rates are on average equal. Fine tuning of the two independent processes suggests the existence of a regulating mechanism. Two types of such mechanisms exist. A decrease in the number of organisms can either speed up the natality rate or slow down the mortality rate. The former mechanism (chemostat-like) acts whenev...

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