نتایج جستجو برای: causes of pollution

تعداد نتایج: 21182357  

2007
Ravi Kanbur Arjun Sengupta

In this note I would like to approach the question posed in the title, and in the literature, from a purely consequentialist perspective. In other words, I want to ask, would treating extreme poverty as a violation of human rights actually lead to a reduction in poverty, or at least lead to the conditions which would in turn lead to a reduction in poverty? This is not to minimize or deny the im...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

today, scouring is one of the important topics in the river and coastal engineering so that the most destruction in the bridges is occurred due to this phenomenon. whereas the bridges are assumed as the most important connecting structures in the communications roads in the country and their importance is doubled while floodwater, thus exact design and maintenance thereof is very crucial. f...

Journal: :IOP Conference Series: Earth and Environmental Science 2021

Journal: :International Journal of Engineering Applied Sciences and Technology 2020

Journal: :Environmental pollution 2015
Hong Qiu Linwei Tian Kin-Fai Ho Vivian C Pun Xiaorong Wang Ignatius T S Yu

Short-term effects of air pollution on mortality have been well documented in the literature worldwide. Less is known about which subpopulations are more vulnerable to air pollution. We conducted a case-only study in Hong Kong to examine the potential effect modification by personal characteristics and specific causes of death. Individual information of 402,184 deaths of non-external causes and...

Journal: :BIO web of conferences 2023

Environmental pollution is not a new phenomenon, but it remains the greatest global problem facing humanity and major environmental cause of morbidity mortality. Human activities related to urbanization, industrialization, mining exploration are at forefront pollution. Both developed developing countries share this burden, although awareness stronger laws in have done more protect their environ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

Journal: :British journal of preventive & social medicine 1959
C DALY

This paper describes a study of the relationship between indices of air pollution and respiratory and other causes of death in the large towns of England and Wales.* Although there are now well over a thousand instruments measuring air pollution in one way or another in England and Wales, grave difficulties are involved in using their results to measure the average exposure to pollution experie...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

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