نتایج جستجو برای: time dust storm activities in iran using synoptic maps of sea level pressure circulation patterns

تعداد نتایج: 24763224  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم طبیعی 1391

in recent years many researchers have been focused on interaction of small molecules with dna. dna is generally the primary intracellular of anticancer drugs, so the interaction between small molecules and dna can cause dna damage in cancer cells, blocking the division of cancer cells and resulting in cell death. the flavonoids are a large group of polyphenolic natural products that are widely ...

سلیقه, محمد , علیجانی, بهلول , مصطفائی, حسن ,

Heavy and torrential rains are one of the hazardous phenomena of atmosphere which always cause several severe damages over Iran. For this reason in every developmental program their intensity and frequency should be understood and predicted. The main factor to their development and intensification are the atmospheric pressure patterns and motions. Therefore, in order to predict their occurrence...

Journal: :جغرافیا و توسعه ناحیه ای 0
رضا دوستان بهلول علیجانی

extended abstract 1. introduction climate change refers to the increase or decrease in the average climatic factors over a long period of time (i.e. more than 30 years). today, climate change has become a human concern and the scientific community are already aware of this fact. global temperature has followed an unprecedented increase over the last hundred years. based on synoptic climatology,...

Journal: :جغرافیا و مخاطرات محیطی 0
علی اکبر رسولی علی محمد خورشید دوست مجتبی فخاری واحد

1. introduction thunderstorms or lightning storms are kinds of storms that generally are associated with the convective clouds and usually are resulted in hailing, strong winds, and flash floods. clouds of convective storms are observed in most regions, but a small percentage of the convective storms can produce severe weather conditions and flash floods that cause damages. a flash flood is a d...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی شیمی 1391

there is no doubt that human being needs to become integrated with industry and industry needs to be progressed, daily. on the other hand, serious events in industrial units specially in oil industries has been shown that such damages and events are industry related ones. the consequence of such events and damages which resulted in chemical and poisoned explosions and loss of life and property ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مدیریت و حسابداری 1391

the application of e-learning systems - as one of the solutions to the issue of anywhere and anytime learning – is increasingly spreading in the area of education. content management - one of the most important parts of any e-learning system- is in the concern of tutors and teachers through which they can obtain means and paths to achieve the goals of the course and learning objectives. e-learn...

Journal: :محیط شناسی 0
شیما عطایی دانشجوی کارشناسی ارشد سنجش از دور، دانشگاه صنعتی خواجه نصیرالدین طوسی علی اکبر آبکار استادیار دانشکده سنجش از دور و فتوگرامتری دانشگاه صنعتی خواجه نصیرالدین توسی علی محمدزاده استادیار گروه سنجش از دور، دانشگاه صنعتی خواجه نصیرالدین طوسی

introduction thermal infrared integrated dust index (tiidi) is one of indices that is presented in this direction. the index operates based on four brightness temperature difference including wavelengths 3.7, 8.6, 11 and 12 micrometer. according to the studies, btd (bt12-bt11) is used for cloud detection. btd (bt8.6-bt11) is the index for separation for dust from sandy surface and btd (bt3.7-bt...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ولی عصر (عج) - رفسنجان - دانشکده ادبیات، زبانهای خارجی و تاریخ 1393

the current thesis is composed in five chapters in the following fashion: chapter two encompasses the applied framework of the project in details; the methodology of carl gustav jung to explain the process of individuation, the major archetypes and their attributes and his techniques to assess the mind’s strata are all explained. moreover, the austrian psychoanalysts, heinz kohut’s models of a...

In this study, using different station and up level atmospheric data, at first, statistical properties of the heat wave, occurred from 27 June to 27 July 2010, have been studied and then, using Ward cluster analysis, mentioned heat wave were classified to third period from severity point of view. Three classes of Iran heat waves are intermediate heat wave with 17 members and average maximum tem...

Journal: :تحقیقات جغرافیایی 0
احمدرضا قاسمی سعید جهانبخش سمیه رضایی سعید جهانبخش معصومه تدیّنی

because of the passing of the air systems, temperature changes are often very sudden and plants cannot adapt themselves to these fluctuations and get damage. because low temperatures have harmful effects on the agricultural productions, so, the investigation of these temperatures are very useful for predicting and preventing probable damages. in this study, for determining the time of the freez...

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