نتایج جستجو برای: population dynamics

تعداد نتایج: 1090949  

Journal: :iranian red crescent medical journal 0
giti ozgoli department of reproductive health and midwifery, faculty of medical sciences, tarbiat modares university, tehran, ir iran saeideh ziaei department of reproductive health and midwifery, faculty of medical sciences, tarbiat modares university, tehran, ir iran; department of reproductive health and midwifery, faculty of medical sciences, tarbiat modares university, tehran, ir iran. tel: +98-2122190488, fax: +98-2122190684 fazlollah ahmadi nursing department, faculty of medical sciences, tarbiat modares university, tehran, ir iran mahyar azar department of psychiatry, faculty of medicine, shahid beheshti university of medical sciences, tehran, ir iran

background: no study has been conducted yet on the process of adjustment of wives with their husbands’ erectile dysfunction in the transitional stages, and there is lack of understanding of this process in iran. objectives: a qualitative, grounded-theory study was designed to examine the process of adjustment of wives with their husbands’ erectile dysfunction in transitional stages. materials a...

Journal: :journal of agricultural science and technology 2010
h. saremi l. w. burgess

environmental factors mainly temperature are believed to determine the distribution and population dynamics of fusarium species in a natural ecosystem. species may be restricted in their distribution by adaptation to specific sets of soil environmental conditions. population dynamics of five fusarium species representative of different climatic conditions were studied at three levels of tem...

2008
Emily A. Stone Todd K. Shackelford David M. Buss Catherine Salmon

Mate preferences shift according to contexts such as temporal duration of mateship sought and ecological prevalence of parasites. One important cross-cultural context that has not been explored is a country’s socioeconomic development. Because individuals in less developed countries are generally less healthy and possess fewer resources than those in more developed countries, displays of health...

2014
Suminori Akiba

A cohor t is a fixed population. Its membership is permanent (even after death)8, 14). Examples are as follows: people born in Kagoshima, and the alumni of Hirosaki University. A cohort study follows a fixed population. Unfixed populations are called dynamic populations (open populations). The membership of a dynamic cohort is not permanent. Examples are as follows: Hirosaki University students...

2004
Ulf Wiberg

The sparsely populated northern Sweden has been the main target area for regional policy efforts since the 1960s. A rich variety of regional policy measures have been launched over the years. However, despite this and a heavy expansion of welfare undertakings a significant depopulation has taken place. Also the first generation of EU Structural Funds show very weak structural impacts on develop...

2009
Indur M. Goklany

Concerns about population growth historically revolved around the notion that there may be insufficient arable land, minerals or energy to meet the needs of an exponentially increasing population. Today they are compounded by fears that as wealth increases, so would consumption of natural resources, and that new technologies would enable further exploitation of these resources. Absent empirical...

2009
Michael A. Schuett Jiaying Lu

The study reported here assessed residents' perception of small, fast-growing coastal community on issues of quality of life, conservation, and growth. Data for the study were collected from an on-site survey in Aransas County, Texas from 2006 to 2007. Results show that the residents are concerned about preserving their natural resources, maintaining a small town atmosphere in their community, ...

Journal: :CoRR 2012
Tadeusz Platkowski Jan Zakrzewski

We consider the dynamics, existence and stability of the equilibrium states for large populations of individuals who can play various types of non–cooperative games. The players imitate the most attractive strategies, and the choice is motivated not only by the material payoffs of the strategies, but also by their popularity in the population. The parameter which determines the weights of both ...

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...

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