نتایج جستجو برای: Damavand Pyroclastics

تعداد نتایج: 231  

M. Mortazavi

Damavand is a fascinating dormant stratovolcano, 60 km to the ENE of Tehran located in the Alborz Mountains. Damavand volcanic products consist of lava flows and pyroclastic fall, flow and surge deposits from different eruption cycles. The volcanic rocks ranges from trachyandesite to trachyadacite and minor basalt. The mineral assemblage consists of potash feldspar (Or43/7), Plagioclase (An25 t...

2011
R. Ghasemi S.K.Y. Nikravesh M. B. Menhaj S. Akbari

i * Corresponding Author, R. Ghasemi is with the Department of Electrical Engineering, Damavand Islamic Azad University, Damavand, Iran (email: [email protected] ). ii S.K.Y. Nikravesh is with the Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran (e-mail: [email protected]). iii M. B. Menhaj is with the Department of Electrical Engineering, Amirkabir Un...

2012
Reza Alizadeh Vahid Ziaee Lotf-Ali Frooghifard Mohammad-Ali Mansournia Ziba Aghsaeifard

Background. This study was designed to evaluate the incidence of acute mountain sickness (AMS) occurring on different climbing routes on Mount Damavand and the effect of beginning time of ascent in Iranian trekkers. Methods. This study was a descriptive cohort investigation, performed in summer 2007. All trekkers who ascended Mount Damavand from northern, western, eastern, and southern paths an...

Journal: :Int. J. of Applied Metaheuristic Computing 2013
Pendar Samadian Ahmad Mozaffari Ali M. Goudarzi Alireza Rezania Kolaei Lasse Rosendahl

46 Optimal Arrangement of Thermoelectric Modules for Recovering the Waste Heat of Damavand Power Plant using Mutable Smart Bee and Neuro-Fuzzy System Pendar Samadian, AAA Linen Co., London, UK Ahmad Mozaffari, Babol University of Technology, Babol, Iran Ali Goudarzi, Babol University of Technology, Babol, Iran Alireza Rezania, Aalborg University, Aalborg, Denmark Lasse Rosendahl, Aalborg Univer...

2006
C. MIZOTA

-Oxygen isotope composition of three types of unique nodules which consist of amorphous silica-apatite, cristobalite-apatite and tridymite-apatite associations interspersed amidst basaltic pyroclastics from the Hat Peres volcano, Golan Heights, Israel is reported. Unusual isotopic temperature (75~ estimated from oxygen isotope fractionation between cristobalite (6'80 = +25.5%0-apatite (6'80 = +...

Journal: :Litosfera 2021

Research subject. Vendian clay rocks of the Shkapovo-Shikhan depression, which is situated in east Volga-Ural region, and volcanic tuffs present among deposits (Sylvitsa Asha groups) on western slope Middle South Urals. Material methods . The research was conducted using data content main rock-forming oxides about 70 samples tuffs. On this basis, a number indicator ratios (lithochemical modules...

,

1-Introduction Damavand volcano was formed by explosive and non-explosive eruptions on the old eroded rock units (Mesozoic and older) of Central Alborz during the Quaternary period and formed two huge cone (Old and Young Damavand). Davidson et al. (2004) determined the time of Old-Damavand activity from 1800 to 800 thousand years ago by measuring Ar/Ar and U-Th/He methods. According to their ...

Journal: :The Review of scientific instruments 2009
C Rasouli D Iraji A H Farahbod K Akhtari H Rasouli H Modarresi M Lamehi

Set of experiments has been developed to study existing runaway electrons in "Damavand" tokamak plasma upon characteristics of hard x-ray emissions produced by collision of the runaway electrons with the plasma particles and limiters. As a first step, spatial distribution of hard x-ray emissions on the equatorial plane of the torus was considered. Obtained spectra of hard x-ray emissions for di...

2012
Reza Alizadeh Vahid Ziaee Ziba Aghsaeifard Farzad Mehrabi Taha Ahmadinejad

PURPOSE Headache at altitudes has had an incidence of 25-62% through many related studies. Many reasons are identified concerning headache at altitudes such as acute mountain sickness (AMS), sinus headache, migraine, tension type headache, and frontal tension headache. This study tried to compare different types of headache among trekkers on Mount Damavand, a 5671m mountain, Iran, to find their...

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