نتایج جستجو برای: and increasing urbanization
تعداد نتایج: 16846470 فیلتر نتایج به سال:
the rate of suicide globally and in iran is increasing. suicide destroys human capital and poses huge obstacles for the improvement of women’s health and for the wider public health agenda. the main objectives of this paper is to review the available evidence on suicide in iran as well as to explore the underlying causes and reasons for suicidal tendencies among iranian women. the paper tests w...
Abstract. We compute the limit distribution for (centered and scaled) length of the longest increasing subsequence of random colored permutations. The limit distribution function is a power of that for usual random permutations computed recently by Baik, Deift, and Johansson (math.CO/9810105). In two–colored case our method provides a different proof of a similar result by Tracy and Widom about...
Urbanization is a process globally responsible for loss of biodiversity and for biological homogenization. Urbanization may have a direct negative impact on species behaviour and indirect effects on species populations through alterations of their habitats, for example patch size and habitat quality. Woodpeckers are species potentially susceptible to urbanization. These birds are mostly forest ...
We prove a formula for the number of permutations in Sn such that their first n−k entries are increasing and their longest increasing subsequence has length n − k. This formula first appeared as a consequence of character polynomial calculations in the work of Adriano Garsia, [2]. We give an elementary proof of this result and also of its q-analogue. In [2], Adriano Garsia derived as a conseque...
The urban identity of the migrant population in citizenship process is a key factor determining whether they are willing to stay city. This paper examines relationship between and willingness rural migrants using Data China Migrants Dynamic Survey. results show significant positive correlation agricultural transfer their stay, can increases probability stay. A moderating variable, improvement p...
The increase in size of human populations in urban and agricultural areas has resulted in considerable habitat conversion globally. Such anthropogenic areas have specific environmental characteristics, which influence the physiology, life history, and population dynamics of plants and animals. For example, the date of bud burst is advanced in urban compared to nearby natural areas. In some bird...
BACKGROUND Wild bees are important pollinators that have declined in diversity and abundance during the last decades. Habitat destruction and fragmentation associated with urbanization are reported as part of the main causes of this decline. Urbanization involves dramatic changes of the landscape, increasing the proportion of impervious surface while decreasing that of green areas. Few studies ...
the prevalence of non-communicable diseases such as hypertension and diabetes including obesity has increased over the past few years in iran. the increase in these diseases has been associated with increased urbanization and lifestyle changes. the burden of non-communicable diseases (ncd) is increasing in low and middle-income countries. the aim of this report is to address the threat of ncds ...
Urbanization affects streams by modifying hydrology, increasing pollution and disrupting in-stream and riparian conditions, leading to negative responses by biotic communities. Given the global trend of increasing urbanization, improved understanding of its direct and indirect effects at multiple scales is needed to assist management. The theory of stream ecology suggests that the riverscape an...
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