نتایج جستجو برای: dust event day

تعداد نتایج: 569237  

Journal: :MONET 2005
Ioannis Chatzigiannakis Sotiris E. Nikoletseas Paul G. Spirakis

Smart Dust is a set of a vast number of ultra-small fully autonomous computing and communication devices, with very restricted energy and computing capabilities, that co-operate to quickly and efficiently accomplish a large sensing task. Smart Dust can be very useful in practice, i.e., in the local detection of a remote crucial event and the propagation of data reporting its realization. In thi...

Journal: :ecopersia 0
sajad khamooshi former master student, department of desert sciences engineering, faculty of natural resources and earth sciences, university of kashan, kashan, iran fatemeh panahi assistant professor, department of desert sciences engineering, faculty of natural resources and earth sciences, university of kashan, kashan, iran abbasali vali associate professor, department of desert sciences engineering, faculty of natural resources and earth sciences, university of kashan, kashan, iran seyed hojat mousavi assistant professor, department of geography and ecotourism, faculty of natural resources and earth sciences, university of kashan, kashan, iran

the occurrence of dust storms and their sources in the southern and central parts of iran during the period of 2002 to 2009 was investigated. for this purpose, the meteorological and synoptic data, data from the middle and upper atmosphere, and wind flow tracking model were used. dust storms and nddi were traced using satellite imagery from fasa, shiraz, and bushehr stations. analysis of the gr...

Journal: :New South Wales Public Health Bulletin 1997

2008
Colleen A. Villanova Michelle J. Creech-Eakman

An important issue affecting operation of ground-based observatories is the local environmental conditions, including dust in the atmosphere. Dust “events” can appear suddenly and without warning, and can be very detrimental to a telescope’s optics. Due to these dust events, optics may be required to undergo cleaning and recoating which can cost the observatory a substantial amount of money, in...

Journal: :Journal of Geophysical Research: Atmospheres 2001

2011
Ken L. Ferrier James W. Kirchner Robert C. Finkel

[1] Dust fluxes are of wide interest because of the effects of dust on climate, oceanic primary productivity, terrestrial biogeochemical cycles, and regolith composition. Estimating long‐ term dust deposition rates, however, can be difficult, especially in steep, eroding terrain. Here we present a geochemical mass balance method for estimating long‐term average rates of dust incorporation into ...

Journal: :Journal of Geophysical Research: Atmospheres 2001

 Dust is one of the environmental hazards and atmospheric phenomena familiar to residents of the southern and southeastern parts of the country. Which each year causes a lot of damages to various sectors such as environment, agriculture, health, transportation, facilities, and so on. Therefore, in this research, we investigated and identified the sources of dust in the area, the intensity and f...

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