The movement of human populations across the planet has character ized human societies throughout history. Historically, resource scarcity or depletion has induced this movement. In recent years, rural populations and their relationships to their environment are again attracting growing interest, especially in connection with population change and particularly migration. Rural areas contain mos...

Migration is a central determinant of population dynamics and structure. We examined whether three major temperament traits--sociability, emotionality, and activity--predicted migration propensity, selective urban-rural migration, and migration distance in a 9-year prospective study in Finland. The participants were Finnish women and men (N= 1,733) ages 15 to 30 years at baseline. The home muni...

In most of the popular implementation of Parallel GAs the whole population is divided into a set of subpopulations, each subpopulation executes GA independently and some individuals are migrated at fixed intervals on a ring topology. In these studies, the migrations usually occur ‘synchronously’ among subpopulations. Therefore, CPUs are not used efficiently and the communication do not occur ef...

The estimation of population parameters from genetic data can help reveal past migration patterns or past population sizes. The transformation from raw genetic data to population parameters needs a model, which should reflect the true relationships between subpopulations. Often the models are overly simplified and do not allow, for example, for differences in population sizes and differences in...

The migration into a natural population of a controlled population, e.g., a transgenic population, is studied using a one island selection-migration model. A 2-dimensional system of nonlinear difference equations describes changes in allele frequency and population size between generations. Biologically reasonable conditions are obtained which guarantee the existence and uniqueness of a polymor...

The migration into a natural population of a controlled population, e.g., a transgenic population, is studied using a one island selection-migration model. A 2-dimensional system of nonlinear difference equations describes changes in allele frequency and population size between generations. Biologically reasonable conditions are obtained which guarantee the existence and uniqueness of a polymor...

one of the most important parts of range doppler algorithm is range cell migration correction. in this part, an interpolation approach is used to estimate data in their correct location. the interpolation method has a great influence on the quality of ultimate image. in this paper the interpolation method and different ways for increasing its accuracy was discussed. the performance of different...

This monograph provides a systematic analysis of interprovincial migration in China and regional population dynamics since the 1950s. Data were obtained from the 1% sample survey of 1987. Chapters are devoted to an examination of the main features of population distribution and spatial differences of major demographic indicators, the causes and selectivity of migration, and the structure of m...