نتایج جستجو برای: Sun: Tornado

تعداد نتایج: 36098  

2013
N. K. Panesar D. E. Innes S. K. Tiwari B. C. Low

An enormous solar tornado was observed by SDO/AIA on 25 September 2011. It was mainly associated with a quiescent prominence with an overlying coronal cavity. We investigate the triggering mechanism of the solar tornado by using the data from two instruments: SDO/AIA and STEREO-A/EUVI, covering the Sun from two directions. The tornado appeared near to the active region NOAA 11303 that produced ...

Journal: :Electronic Commerce Research and Applications 2011
Laerte Kerber Franco João H. Rosa Jorge L. V. Barbosa Cristiano André da Costa Adenauer C. Yamin

A evolução constante da tecnologia computacional e das redes sem fio tem tornado os dispositivos móveis cada vez menores e mais poderosos, provendo serviços em qualquer lugar e a qualquer momento. Nesse contexto, áreas de pesquisa como as de educação, entretenimentos e atualmente o comércio têm experimentado forte crescimento. Este trabalho propõe um modelo de comércio ubíquo chamado MUCS, que ...

Solar magnetic tornadoes are known to be one of the mass and energy transport mechanisms from the lower solar atmosphere into the upper layers of the solar corona. A bright spiral structure with two arms is observed using high-cadence EUV images of 171, 193 and 304 Ǻ channels of Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO) on 10th of July 2011 for three hours. ...

Journal: :Astronomy & Astrophysics 2020

Journal: :Disasters 2015
Bimal Kanti Paul Mitchel Stimers Marcellus Caldas

Joplin, a city in the southwest corner of Missouri, United States, suffered an EF-5 tornado in the late afternoon of 22 May 2011. This event, which claimed the lives of 162 people, represents the deadliest single tornado to strike the US since modern record-keeping began in 1950. This study examines the factors associated with responses to tornado warnings. Based on a post-tornado survey of sur...

Journal: :American journal of infection control 2015
Beth A Forshee-Hakala

BACKGROUND Infections following a natural disaster such as an EF-5 tornado can be atypical and difficult to treat. Studies have looked at illness following several natural disasters, but few have studied respiratory illness following a tornado. MATERIALS AND METHODS A review of patients with pneumonia admitted during the period from May 22, 2009, through May 21, 2012, was completed. The Torna...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - پژوهشکده ریاضی ماهان 1391

در این پایان نامه توزیع آماره های ترتیبی از توزیع نرمال دو متغیره و سه متغیره محاسبه می کنیم. همچنین به معرفی توزیع چوله نرمال یکریخت که با نماد sun نمایش می دهیم تابع مولد گشتاور این توزیع و برخی از خواص آن می پردازیم. نحوه ساختن توزیع sun را از توزیع نرمال سه متغیره ارائه می دهیم و نشان می دهیم که توزیع آماره های ترتیبی از توزیع نرمال سه متغیره به صورت مخلوطی از توزیع sun می شود.

2014
John A. Long Paul C. Stoy

Tornado frequency may increase as the factors that contribute to severe convection are altered by a changing climate. Attributing changes in tornado frequency to observed global climate change is complicated because observational effort has increased over time, but studies of the seasonal distribution of tornado activity may avoid sampling biases. We demonstrate that peak tornado activity has s...

2012
Michael K. Tippett Adam H. Sobel Suzana J. Camargo

[1] Monthly U.S. tornado numbers are here related to observation-based monthly averaged atmospheric parameters. Poisson regression is used to form an index which captures the climatological spatial distribution and seasonal variation of tornado occurrence, as well as year-to-year variability, and provides a framework for extended range forecasts of tornado activity. Computing the same index wit...

2016
VINCENT Y. S. CHENG GEORGE B. ARHONDITSIS DAVID M. L. SILLS WILLIAM A. GOUGH HEATHER AULD

Destruction and fatalities from recent tornado outbreaks in North America have raised considerable concerns regarding their climatic and geographic variability. However, regional characterization of tornado activity in relation to large-scale climatic processes remains highly uncertain. Here, a novel Bayesian hierarchical framework is developed for elucidating the spatiotemporal variability of ...

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