نتایج جستجو برای: obstacles of sustainable development in tehran
تعداد نتایج: 24491508 فیلتر نتایج به سال:
by shouldering the burden of a big chunk of global production, and giving shelter to half of the world’s population, currently cities play an important role in national economies. benefits of agglomeration in cities have played a major role in the process of economic development of different countries, however, the expansion of urbanization has produced some problems including environmental and...
There is a growing recognition that the present demographic patterns in sub-Saharan Africa, including Ghana, do not augur well for the achievement of sustainable development. Ghana is characterized by a youthful population, rapid population growth, uneven population distribution, high fertility, and rural-urban migration which has brought human numbers into collision with resources to sustain ...
Sustainability is a key challenge for humanity in the 21st century. Ecosystem services-the benefits that people derive from nature and natural capital-is a concept often used to help explain human reliance on nature and frame the decisions we make in terms of the ongoing value of nature to human wellbeing. Yet ecosystem service science has not always lived up to the promise of its potential. De...
abstract the present study was conducted to examine the effect of proficiency on students interaction while carrying out the grammar-based task(s) in collaboration. in particular, the study examines whether the level of proficiency affects the learners’ focus of attention to grammatical and lexical features. the study takes a further step and examines whether there is any difference in the use...
The impact of tourism on urban structures and spaces has led tourism to be of particular importance to urban management, and suggests to city managers that improving the quality of these spaces and creating suitable facilities for tourists such as residential centers, recreation areas, and the provision of equipment and modern furniture may urban attract visitors to urban public spaces and ulti...
abstract in written mode of language, metadiscourse markers are used commonly to help writers in general and academic writers in particular to produce coherent and professional texts. the purpose of the present study was to compare introduction sections of applied linguistics and physics articles regarding their use of interactive and interactional metadiscourse markers based on the model pro...
Companies need to develop more sustainable products that fit into future more sustainable markets. For this reason, the integration of sustainability considerations is needed in the early stages of product development, where a major part of the sustainability performance of a final product is determined. The aim of the research presented in this doctoral thesis is to better understand both enab...
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
energy-based optimized design of polymer fiber-reinforced tunnel lining mohammad safi analysis of underwater tunnels considering strain-softening behavior in plastic zone ahmad fahimifar; hamed ghadami; masoud ahmadvand; arvin abdolmaleki the effect of operational parameters on penetration rate of a tbm using artificial neural networks- a case s...
recent debates concerning sustainable agriculture have received many attentions, but efforts concerning materialization of the concept haven’t enough. if the concept of sustainability is to be used as an underlying component of human interventions in the environment and ecosystem, a sound measure of sustainability is surely required. development of agricultural sector without considering the co...
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