نتایج جستجو برای: moving sands

تعداد نتایج: 107815  

Journal: :desert 2013
a. tavakkolifard h. ghasemieh a. a. nazari samani n. mashhadi

the kashan erg is one of the most important sand dune complexes in iran. being affected by wind erosion, theerg's borderlands face numerous problems as a result of sand movement. to evaluate the risk of sands moving intoresidential areas near the kashan erg, anemometry data from synoptic stations located in kashan, ardestan, meimeh,naeen, and qom were collected and analyzed to calculate the san...

اصغری لفمجانی, صادق, نادریان فر, مهدی,

Every year, natural hazards happen severely around the world. Iran is included in the first 10 countries in the world susceptible to natural hazards, and has experienced 30 hazards out of total 35 hitherto. In this connection, moving sands, as a natural hazard, creates changes to ecological conditions which cause a rupture in the lives of people. The aforementioned hazards leave adverse effects...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه خلیج فارس - دانشکده مهندسی 1393

in civil engineering concrete is a material combined of hydraulic cement, sand, gravel and water. gravel and sand compose 60 to 70 percent of concrete. these aggregates support compression force of concrete. cement paste acts as glue to stick grain together. in bushehr factories producing aggregates do not operate according to astm standards, so that fineness modulus (fm) of the produced sands ...

Journal: :E3S web of conferences 2023

This article discusses the development of compositions new, effective, water-soluble fixatives-reagents based on local raw materials and industrial waste. A technology has been developed for obtaining using new types complex additives-fixers hydrolyzed polyacrylonitrile polyelectrolyte, which can be recommended implementation when fixing saline soils sands Aral region. Chemical reagents have se...

1999
Scott D. Coutts

The purpose of this work is to establish how a moving emitter can be localized by a passive receiver using inhomogeneous bistatic scattering. This is a novel localization technique that assumes no a priori knowledge of the location of the reflecting sources. The emitter parameters of range, heading, velocity, and altitude are estimated and the variances of the estimates are determined. The prop...

Journal: :International Journal of Current Science Research and Review 2022

In this article presents the work carried out to protect roads passing through sandy areas from moving sands and recommendations for computer modeling of means protection conditions Uzbekistan. The flow wind sand interacts with any type obstacles installed on ground, which in turn causes erosion, displacement around them, subsidence surface after subsides. This can lead harmful consequences, su...

توکلی فرد, اصغر, قاسمیه, هدی, مشهدی, ناصر, نظری سامانی, علی اکبر,

  Kashan Erg is one of the most important sand dunes complexes in Iran. Due to erosive winds, always, Erg's marginal areas are faced to the transition of moving sands. So, in this research, the sand dune activity was investigated by Lancaster index. In this line, Erg's morphology map was prepared using aerial photographic, Google earth software and field observations. Then, maps of iso...

2017
Ke Wang Harrie Vredenburg Jianliang Wang Yi Xiong Lianyong Feng Mark J. Kaiser

Oil sands, as unconventional oil, are so essential to both Canada and the world that special attention should be paid to their extraction status, especially their energy efficiency. One of the most commonly used methods to evaluate energy efficiency is the Energy Return on Investment (EROI) analysis. This paper focuses on EROI analysis for both in situ oil sands and mining oil sands over the pe...

2008

Othello was written at a particular moment in history when the European construction of the ‘other’ was moving from a medieval to a modern paradigm. This involved a shift from religion to race and colour as the key signifiers of difference. In other words, Othello was written at a time when modern racial ideology and racial prejudice as we know them were coming into being but were not yet fully...

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