Open Access
Subscription Access
Population Implosion and the Model of Cavitation Applied to Demography
Based on the hypothesis that in all states of flux (including demographic flux), as in all liquids, the phenomenon of cavitation appears when the local (or demographic) pressure decreases below the vaporization value (the demographic point of survival) respectively, under the saturation pressure (defined by the fertility rate), at the given temperature of gases (general demographic conditions), dissolved in the liquid. This paper presents and analyses cavitation phenomenon as a powerful, rather than merely a potential, demographic model. The structure of this paper could be considered as a succinct three-section solution to describe the evolution from the demographical explosion of the entire world to the demographical implosion of the whole of Europe during the next three or four decades, in a number of population trends. Some final remarks underline the importance of cavitation model and its applied version in demographic implosion, as well as evaluation of the risk of cavitation and computation of cavitation coefficients in demography.
Keywords
Cavitation Phenomenon, Risk of Cavitation, Cavitation Coefficients, Implosion, Demography.
User
Font Size
Information
- Penrose, R., The Emperor’s New mind, Concerning computers, Minds, and the Law of Physics, Oxford University Press, Oxford, UK, 1989, p. 189.
- Savoiu, G., Statistica aplicata in domeniul economic şi social, Independenţa Economica Publishing House, Bucharest, 1986, p. 47.
- Trebici, V., Populaţia Terrei. Demografie mondiala (ed. Stiintifica), Bucharest, 1991, p. 54.
- Trebici, V., Teorii moderne despre populaţie. Romanian Stat. Rev., 1970, 18 (8), 11–29.
- Massey, D., Arango, J., Graeme, H., Kouaouci, A., Pellegrino, A. and Taylor, E. J., Worlds in Motion. Understanding International Migration at the End of the Millennium, Clarendon Press, Oxford, 1998.
- Kritz, M., Lim, L. and Zlotnik, H., International Migration Systems – A Global Approach, Clarendon Press, Oxford, 1992.
- Anton, I., Cavitaţia, Romanian Academy Publishing House, Bucharest, 1985, vol. II, p. 81.
- Harvey, E. N., McElroy, W. D. and Whitely, A. H., On cavity formation in water. J. Appl. Phys., 1947, 18(2), 162–172.
- Knapp, R. T., Daily, J. and Hammit, F., Cavitation, McGraw-Hill Book Company, New York, USA, 1970.
- Bordeasu, I., Patrascoiu, C., Badarau, R., Sucitu, L., Popoviciu, M. and Balasoiu, V., New contributions to cavitation erosion curves modelling. FME Trans., 2006, 34(1), 39–44.
- Balasoiu, V., Razga, C., Popoviciu, M. and Bordeasu, I., Cavitation in directional valve, coefficients and characteristic curves. In The 4th International Conference on Hydro-power Engineering of Romania, 2006, 2(5), 521–532.
- Popa, N. and IorgaSiman, I., The influence of the cavity phenomenon on the working degree of axial mechanical seals I. In Proceedings of the 5th Nordic Symposium on Tribology Helsinki, Finland, 1992, pp. 231–243.
- Popa, N. and IorgaSiman, I., The tribological behaviour of the materials used for mechanical axial seals. In Proceedings of the 5th International Symposium Intertrib 1993, Bratislava, Slovakia, 1993, pp. 116–124.
- Savoiu, G., Populatia lumii intre explozie si implozie demografica, International Publishing House, Bucharest, 2006, pp. 80–81.
Abstract Views: 381
PDF Views: 105