نتایج جستجو برای: slope protection

تعداد نتایج: 231921  

ادیب طوسی, , محمدرضا گیتی, , محمود معتمدی, , پژمان مضطرزاده, ,

Background: Sport medicine is a relatively new scientific branch in Iran. In order to evaluate sport injuries in Iranian skiers we examined and followed all ski players who was injured while skiing in Shemshak slope during a skiing season (January to April 2000). Materials and Methods: During a period of 3 months, a total of 32050 persons skied in Shemshak slope and 76 case of injuries were ide...

This study was carried out in managed and unmanaged Fagus orientalis L. (beech) stands in the Asalem beech forest in order to compare the composition and diversity of plant species. Three V-shaped catena landforms were selected for each stand. Then, large quadrats, 400 m2 area, with selective method and within each of them, small quadrats, 4 m2 area, were established along each catena and slope...

Journal: :Turkish Journal of Remote Sensing and GIS 2021

This study aimed to produce the erosion susceptibility map of Godrahav basin by using Analytic Hierarchy Process (AHP) method. stream basin, located within borders Artvin province in Eastern Black Sea Region, covers an area approximately 5310.12 hectares. In order area, 11 geo-environmental criteria which are effective formation (slope, aspect, profile curvature, drainage density, distance netw...

2005
R. Johannesson V. Pavlushkov V. V. Zyablov

In this paper several rate R = 2/5 convolutional encoding matrices with four states are used to illustrate how unequal error protection can be achieved for the different positions in the code sequences as well as in the information sequences. Free outputand input-distances and active burst outputand input-distances are computed. Typically a single code cannot combine a large free outputor input...

Journal: :Environmental toxicology and chemistry 2005
Stephen Brinkman John Woodling

The median 96-h lethal zinc concentration (LC50) was 439 microg Zn/L (hardness of 154 mg/L as CaCO3) for feral mottled sculpin (Cottus bairdi), decreasing to a median incipient lethal level of 266 microg Zn/L after 13 d. The 30-d chronic value was 255 microg Zn/L. The acute toxicity-hardness (ln-ln) slope of 1.022 exceeded that of the current U.S. Environmental Protection Agency zinc criteria. ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده کشاورزی 1393

هر ساله وقوع باران¬ های شدید باعث ایجاد شکست در تعداد زیادی از شیب های خاکی می¬شود .در طول این باران ها، سطح آب زیرزمینی بالا آمده و باعث افزایش فشار آب منفذی و کاهش پایداری شیب می¬گردد. استفاده از زهکش های افقی روشی موثر و کم هزینه جهت کنترل پایداری شیب در این حالت می باشد. با استفاده از این زهکش ها، آب پیوسته از محیط خاک جمع آوری شده و به تبع آن فشار آب منفذی کاهش و پایداری شیب افزایش می¬یابد...

Journal: :Proceedings of ... Conference on Coastal Engineering 2023

Wave energy dissipation on coral reefs provides protection from coastal hazards to over 200 million people globally (Ferrario et al. 2014). The mechanisms of wave the complex morphologies fore-reef slope have typically been overlooked (Duce 2016). Here we focus attenuation by elongated troughs and depressions typical slopes known as spurs grooves (SaGs).

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