COMPUTER SIMULATION OF THE PROCESS OF PLANT PROTECTION, TAKING INTO ACCOUNT THE TIME-AGE STRUCTURE AND SPATIAL DISTRIBUTION WITH ARBITRARY TROPHIC FUNCTIONS

Author(s):  
Raim Nazarovich Odinaev ◽  
Parviz Lutfulloevich Narzulloev ◽  
Alisher Bobobekovich Gaforov
Author(s):  
Ivan Marinkovic

The results of the 2002 census pointed out to an enormous increase in the number of inhabitants who were nationally undeclared or undecided. In the inter-census period 1991-2002, this population group increased for more than ten times (from 5 054 to 55 016). According to the share in the total population of Vojvodina (2.71%), they are - along with the Croats (2.78%) and the Slovaks (2.79%) - located immediately after the most numerous nationalities, the Serbs and the Hungarians. The paper analyzes the basic demographic characteristics (gender and age structure) of the undeclared and undecided persons, as well as the differences and similarities with other nationalities. The paper also presents the unequal spatial distribution of that population (at the settlement and municipal level), pointing out the interdependence between a great number of Yugoslavs and the enormous increase in the persons who were nationally undeclared or undecided. Using the features mother tongue and religion, the author tried to establish the relative relation between the number of the nationally undeclared and the number of nationally undecided persons.


2012 ◽  
Vol 32 (12) ◽  
pp. 3866-3872 ◽  
Author(s):  
袁春明 YUAN Chunming ◽  
孟广涛 MENG Guangtao ◽  
方向京 FANG Xiangjing ◽  
柴勇 CHAI Yong ◽  
李贵祥 LI Guixiang ◽  
...  

1992 ◽  
Vol 57 (1) ◽  
pp. 85-99 ◽  
Author(s):  
David A. Young ◽  
Robert L. Bettinger

We develop a mathematical model for the spread of Numic-speaking peoples across the Great Basin in the second millennium A.D., in accord with the ideas of Bettinger and Baumhoff (1982), who suggested a competitive interaction between the Numic and Prenumic peoples of the region. We construct differential equations representing two competing populations that spread by a diffusion process across an area representing the Great Basin. The demographic variables are fixed to agree with ethnographic data, while the migration rates are fitted to the estimated time for the completion of the spread. The model predicts a spatial distribution of the Numic languages in satisfactory agreement with observations and suggests new avenues of investigation.


Ethology ◽  
2010 ◽  
Vol 103 (12) ◽  
pp. 999-1014 ◽  
Author(s):  
Giorgio Bertorelle ◽  
Angelo Bisazza ◽  
Andrea Marconato

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