نتایج جستجو برای: cold wave
تعداد نتایج: 320363 فیلتر نتایج به سال:
The temperature as an indicator of heat intensity is one of the basic elements of knowing weather. The frost is a condition when the air temperature is less than 0 c Due to the geographical possition of Iran, spring is a season that plants resume a new life after leaving a pause in a periode of the growth. At the beginning of such a periode emerge of sudden cold cause loss bloom (in the case of...
The aim of this paper is to give an account of some applications of pseudodifferential calculus for solving linear wave equations in the limit of high frequency/short wavelength waves. More specifically, on using as a benchmark the case of electromagnetic waves propagating in a cold isotropic slowly spaceand time-varying plasma, it is shown that, in general, linear plasma waves are governed by ...
BACKGROUND AND PURPOSE Juvenile rheumatoid arthritis (JRA) is the most common form of arthritis in children and affects both quality of life and school attendance. Weather and temperature conditions are believed to affect joint pains; however, very few studies have investigated this issue. This study examined the association between joint pain in JRA patients and weather conditions. METHODS T...
BACKGROUND: Of the electrocardiographic changes in chronic obstructive lung disease (COLD) patients, a shift of the P wave axis greater than 90 which is highly characteristic, is said to be due to hyperinflation and does not occur in interstitial lung disease. OBJECTIVE : To describe the electrocardiographic changes in chronic obstructive lung disease patients. METHODS: The electrical axis of t...
An exciting and extremely active area of research investigation during the past years has been the study of solitons and the related issue of the construction of solutions to a wide class of nonlinear equations. The concept of solitons has now become umbiquitous in modern nonlinear science and indeed can be found in various branches of physics. In nonlinear wave propagation through continuous m...
One of the atmospheric hazards that seriously affect human life and health is the occurrence of thermal tensions and stress in the form of heat and cold waves. Iran is one of the areas of the planet that has climate variability due to its geographical characteristics; therefore, consequently, its different regions are not immune to heat and cold waves. On the other hand, Iran's climate variabil...
BACKGROUND Few studies have examined variation in the associations between heat waves and mortality in an international context. OBJECTIVES We aimed to systematically examine the impacts of heat waves on mortality with lag effects internationally. METHODS We collected daily data of temperature and mortality from 400 communities in 18 countries/regions and defined 12 types of heat waves by c...
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