نتایج جستجو برای: level jet

تعداد نتایج: 1115007  

Journal: :Bulletin of the American Meteorological Society 2006

2013
DAVID J. LORENZ

Rossby Wave Chromatography (RWC) is implemented in a linearized barotropic model as a tool to understand the response of the mid-latitude jet to external forcing. Given the background zonal-mean flow and the space-time structure of the baroclinic wave activity source, RWC calculates the space-time structure of the upper tropospheric eddy momentum fluxes. RWC is used to diagnose and understand t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1389

چکیده دراین پایان نامه خصوصیات حالتهای نهایی چند ذره ای که دربر هم کنشهای الکترون – پوزیترون تولید می شوند رامورد مطالعه قرار می دهیم.شکل رویداد وتوزیع ذرات باردار راارائه می دهیم وسپس اندازه گیریهای خودرا بامدلهای( ترکش+ qcd) مقایسه می کنیم.در این مدلها درمرحله اختلالی از تحول آبشار پارتونی یا عناصر ماتریسی qcd استفاده شده است.در مرحله هادرونی شدن ازترکش string ویا ترکش خوشه ای استفاده می شو...

2009
JAMES D. DOYLE MELVYN A. SHAPIRO

Numerical model simulations of idealized and observed flows are used to investigate the dynamics of low-level jet streams that form in stratified flow downstream of the vertex of large elliptical barriers such as the southern tip of Greenland, hereafter referred to as ‘‘tip jets’’. The tip jet dynamics are governed by conservation of Bernouli function as parcels accelerate down the pressure gra...

2006
G. P. SALAM

Though it is widely taken for granted that it makes sense to separately discuss quark and gluon jets, normal jet algorithms lead to a net parton-level jet flavour that is infrared (IR) unsafe. This writeup illustrates the problem and explains how the kt algorithm can be modified to provide an IR safe parton-level flavour. As well as being of use in theoretical calculations that require a projec...

2016
Temel Oguz Baptiste Mourre

Using a coupled physical-biological model, we document that a 30 km wide meandering jet constitutes a major source of biological enrichment in the Alboran Sea (Western Mediterranean) even in the absence of wind forcing and tidal dynamics. The level of enrichment is shown to vary markedly during the year depending on the upstream characteristics of the jet as it exits from the Gibraltar Strait. ...

1963
WALTER H. HOECKER

For the first time in metcorological history the broad aspects of the southerly low-level jet o\er the Western Plains have been studied in fine detail both in time and space. This as acconiplished in the spring of 1961 by means of a line of 13 pibal stations established between Amarillo, Tex., and Little Rock, Ark. Twenty-five consecutive hourly observations were taken at each station on a tota...

Journal: :پژوهش های جغرافیای طبیعی 0
حسین عساکره دانشیار اقلیم شناسی، گروه جغرافیای دانشگاه زنجان، زنجان، ایران هوشنگ قائمی استاد هواشناسی، پژوهشکدة هواشناسی، تهران، ایران آذر بیرانوند کارشناس ارشد آب و هواشناسی سینوپتیک، دانشگاه زنجان، زنجان، ایران

introduction according to the definition of world meteorology organization (wmo), as the speed of the air mass is more than 30 meters per second, the jetstream will arise. the core of the jetstream is with baroclinic atmosphere due to the large difference in temperature and wind speed. there are two west jetstreams in the northern hemisphere. the northern jet stream is called polar front jetstr...

باقری, مولود , حسین زاده کلاگر, اباصلت, صحبت زاده, فرشاد , فرهادی, معصومه, مرتضوی, محسن, مطلبی, سمانه, معماریانی, حامد, میرزانژاد, سعید , ولی نتاج عمران, آزاده ,

In this paper, construction of triplet atmospheric plasma jet using argon, air, oxygen and nitrogen gases is reported. Bactericidal effect of the plasma jet is also investigated. To that end, longitudinal geometric configuration for the electrodes was chosen because it would increase the jet length. Electrical characteristics, jet length dependencies on the applied voltage and gas flow rate wer...

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