نتایج جستجو برای: weather modification

تعداد نتایج: 169677  

2004
Elisabeth R. Gerber Jeffrey B. Lewis

Despite the centrality of the median voter prediction in political economy models, overwhelming empirical evidence shows that legislators regularly take positions that diverge significantly from the preferences of the median voter in their districts. However, all these empirical studies to date lack the necessary data to directly measure the preferences of the median voter. We utilize a unique ...

Journal: :Nature 1967

2009
P. J. O’Farrell

Introduction ‘Everybody talks about the weather, but nobody does anything about it’, said Mark Twain. But this famous quote is decidedly inaccurate: people have long contemplated weather modification, and both adapt or adjust to weather conditions, and move towards or away from certain climatic regimes. Southern Africa generally has a high coefficient of rainfall variation, making droughts a fr...

2010
Robert G. Hallowell John Y. N. Cho

A series of fatal commercial aviation accidents starting in the 1970s led to the identification of thunderstorm-related wind shear as a critical hazard to aircraft takeoffs and landings. In aggregate, these accidents resulted in over 400 fatalities and pressured the Federal Aviation Administration (FAA) to develop effective warning technologies. In response, the aviation community invested in a...

2014
Peter Lercher Ulrich Widmann Jürg Thudium

Up to now, traffic noise effect studies focused on hypertension as health outcome. Hypotension has not been considered as a potential health outcome although in experiments some people also responded to noise with decreases of blood pressure. Currently, the characteristics of these persons are not known and whether this down regulation of blood pressure is an experimental artifact, selection, o...

Journal: :Public understanding of science 2012
Priya Kurian Jeanette Wright

The acceptance of public participation in science and technology governance in liberal democratic contexts is evident in the institutionalization of a variety of mechanisms for participation in recent decades. Yet questions remain about the extent to which institutions have actually transformed their policy practice to embrace democratic governance of techno-scientific decision making. A critic...

2015
Julian Hunt L F Richardson

Journal: :acta medica iranica 0
"pourang h sadighi a "

hirchsprung’s disease is a developmental disorder of the enteric nervous system, characterized by abdsence of ganglion cell in the myenterric and submucosal plexuese along a variable portion of the distal intestine.the purpose of this study is the presentation of a new procedure for reduction of the postoperative complications of hirschsprung’s disease (hd) by offering a modified swenson’s tech...

Journal: :iranian journal of parasitology 0
mehdi mohebali dept. of medical parasitology and mycology, school of public health, tehran university of medical sciences, tehran, iran and center for research of endemic parasites of iran (crepi), tehran university of medical sciences, tehran, iran behnaz akhoundi dept. of medical parasitology and mycology, school of public health, tehran university of medical sciences, tehran, iran zahra kakooei dept. of medical parasitology and mycology, school of public health, tehran university of medical sciences, tehran, iran zabih zarei dept. of medical parasitology and mycology, school of public health, tehran university of medical sciences, tehran, iran and meshkin shahr research station, school of public health, tehran university of medical sciences, meshkin shahr, iran sorour charehdar dept. of medical parasitology and mycology, school of public health, tehran university of medical sciences, tehran, iran soheila molaei meshkin shahr health centre, ardabil university of medical sciences, meshkin shahr, iran

background: visceral leishmaniasis is systematic serous parasitic disease with pub­lic health importance. zoonotic form of visceral leishmaniasis is wide spread in mediterranean basin and south america regions. direct agglutination test (dat) is an accurate, reliable and non-expensive serological test for the diagnosis of visceral leishmaniasis in human and canines but the antigen preparation i...

Journal: :international journal of environmental research 2010
h.r. tashauoei h. movahedian attar m. kamali m.m. amin m. nikaeen

chromium (vi) adsorption behavior and capacity by surface modified nanozeolite a has been investigated. surface modification was performed and the morphology of modified and unmodified nanozeolite was studied using scanning electron microscope (sem) and transmission electron microscope (tem). adsorption isotherms were studied under different conditions (ph, adsorbent dose, adsorbate concentrati...

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