نتایج جستجو برای: ecological model
تعداد نتایج: 2187682 فیلتر نتایج به سال:
The current study was conducted in the rangeland of Glandrood watershed in the province of Mazandaran. The main objective of this study was to investigate the responses of forbs species to some environmental gradients. For these purpose 153 plots of 1m2 were established along the altitude gradient and Trasp. The sampling method was randomized-systematic. In the area sampled, frequency of forbs ...
today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...
background: women-headed households are more exposed to social damages than other women. such condition remarkably influences the women's health-related life quality. the present study is aimed to investigate the effect of an educational intervention in quality of life of women-headed households under protection of tehran welfare organization, in 2015. methods: in this quasi-experimental stud...
background: women-headed households are more exposed to social damages than other women. such condition remarkably influences the women’s health-related life quality. the present study is aimed to investigate the effect of an educational intervention in quality of life of women-headed households under protection of tehran welfare organization, in 2015. methods: in this quasi-experimental stud...
Many physical diseases have been reported to be associated with psychosocial factors. In these diseases, assessment relies mainly on subjective symptoms in natural settings. Therefore, it is important to assess symptoms and/or relationships between psychosocial factors and symptoms in natural settings. Symptoms are usually assessed by self-report when patients visit their doctors. However, self...
Ecological momentary assessment and/or experience sampling methods are increasingly used in health studies to study subjective experiences within changing environmental contexts. In these studies, up to 30 or 40 observations are often obtained for each subject. Because there are so many measurements per subject, one can characterize a subject's mean and variance and can specify models for both....
Nowadays, studying in higher education is not as uncomplicated as it seems to be, particularly in PhD programs. Given the complex interplay of multiple variables affecting one’s experience in such programs, there is a mounting need for probing more into the ways in which PhD students’ lives are affected by these factors, and how their transition trajectories emerge. The present study explored t...
over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...
Some of the classic experiments in ecology have involved real organisms interacting in the laboratory, that is, model systems. Ecologists are increasingly using model systems to investigate problems of global environmental change and questions about the assembly, persistence, and stability of complex communities. Model laboratory systems are a halfway house between mathematical models and the f...
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