نتایج جستجو برای: ineffective transport system in large cities including tehran
تعداد نتایج: 17471564 فیلتر نتایج به سال:
nowadays, the development of anti cancer drugs is an important subject in pharmacology. bisphosphonates (b.p) are a great choice for design and production of the types of drugs which not only could perform as anti cancer agents but also could inhibit the function of acetyl cholinesterase (ache). ache hydrolyzes the acetylcholine (which is a neurotransmitter in nervous system) using the oh in i...
Objective: Today some of the problems and difficulties in developing countries are related to the manner of their internal migrations. Each year millions of the rural population in the developing countries decided to migrate to the urban areas of these countries and this phenomenon has had negative consequences in the cities. In fact the migration that itself is created by many factors is a...
BACKGROUND The majority of people live in cities and urbanization is continuing worldwide. Cities have long been known to be society's predominant engine of innovation and wealth creation, yet they are also a main source of pollution and disease. METHODS We conducted a review around the topic urban and transport planning, environmental exposures and health and describe the findings. RESULTS...
it is not possible to understand developments of a country’s culture and civilization without knowing his believes and myths. whether it is north or south, east or west, planes or mountains, sahara or deserts, here in iran every corner includes valuable and precious treasures which are known all over the world, and cultural – historical objects which are found here adorn all well known museums...
STEP System conventional gravity sewer system (like those used in large towns and cities) and a centralized wastewater treatment plant is the most cost-effective and environmentally-sound way to collect, transport, and treat the wastewater. In more sparsely populated areas, where lot sizes are large and homes are spaced widely apart, onsite wastewater treatment with subsurface discharge may be ...
Many bacteria on earth exist in surface-attached communities known as biofilms. These films are responsible for manifold problems, including hospital-acquired infections and biofouling, but they can also be beneficial. Biofilm growth depends on the transport of nutrients and waste, for which diffusion is thought to be the main source of transport. However, diffusion is ineffective for transport...
with the advent of cyberspace and development of data and information, virtual cities were presented as new forms of city management in different layers and territories. historic and tourism virtual city are among eight types of virtual cities. in this article some guidelines were presented in order to design and manage them based on tehran tourists' need assessment. theoretical framework ...
From the past to the present time, in all civilizations and countries, urbanization is considered the most striking evolution of human societies. With the advent of the industrial revolution and the rapid expansion of cities, societies were faced with numerous problems. One of the most significant problems is Extreme centralization in one city or more and fragmentation of urban hierarchical sys...
From the past to the present time, in all civilizations and countries, urbanization is considered the most striking evolution of human societies. With the advent of the industrial revolution and the rapid expansion of cities, societies were faced with numerous problems. One of the most significant problems is Extreme centralization in one city or more and fragmentation of urban hierarchical sys...
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