نتایج جستجو برای: ethical erosion

تعداد نتایج: 80245  

2011
Dirk Goossens Brenda Buck

Wind erosion measurements were carried out in Nellis Dunes Recreation Area, southern Nevada, USA. Gross erosion (the total mass of sediment effectively blown away from a surface), gross deposition (the total mass of sediment effectively depositing on a surface) and net erosion (the difference in sediment mass before and after an event) were measured for 1 year, on 17 different types of surfaces...

Journal: :Environmental Modelling and Software 2004
Robert Scott Van Pelt Ted M. Zobeck

In the United States, the USDA Natural Resources Conservation Service (NRCS) is the primary agency charged with the task of reducing wind erosion associated with production agriculture. The NRCS has used the Wind Erosion Equation (WEQ) (Woodruff and Siddoway, 1965) to assess the effects of field management on the potential for wind erosion for the last two and a half decades. The WEQ uses input...

2016
Jianlin Zhao Kristof Van Oost Longqian Chen Gerard Govers

Despite a multitude of studies, overall erosion rates as well as the contribution of different erosion processes on Chinese Loess Plateau (CLP) remain uncertain, which hampers a correct assessment of the impact of soil erosion on carbon and nutrient cycling as well as on crop productivity. In this paper we used a novel approach, based on field evidence, to reassess erosion rates on the CLP befo...

Journal: :Science 2015
Frédéric Herman Olivier Beyssac Mattia Brughelli Stuart N Lane Sébastien Leprince Thierry Adatte Jiao Y Y Lin Jean-Philippe Avouac Simon C Cox

Assessing the impact of glaciation on Earth's surface requires understanding glacial erosion processes. Developing erosion theories is challenging because of the complex nature of the erosion processes and the difficulty of examining the ice/bedrock interface of contemporary glaciers. We demonstrate that the glacial erosion rate is proportional to the ice-sliding velocity squared, by quantifyin...

2009
Shuji Hattori Makoto Takinami Tomoaki Otani

Both cavitation erosion and liquid impingement erosion are phenomena that can cause pipe wall thinning in power plants. The Code for Power Generation Facilities, Rules on Pipe Wall Thinning Management, was published by the JSME (Japan Society of Mechanical Engineers) in 2005. The code says that cavitation erosion shall be prevented either in the design stage or by daily inspection. On the other...

2011
M. LEH S. BAJWA I. CHAUBEY

The objective of this study was to evaluate the impact of rapidly changing land use on erosion and sedimentation in a mixed land use watershed in the Ozark Highlands of the USA. The research combines a geographic information system-based soil erosion modeling approach with land use change detection to quantify the influence of changing land use on erosion risk. Five land use/land cover maps wer...

2009
Masoud Nasri Sadat Feiznia Mohammad Jafari Hasan Ahmadi

Today, incorrect use of lands and land use changes, excessive grazing, no suitable using of agricultural farms, plowing on steep slopes, road construct, building construct, mine excavation etc have been caused increasing of soil erosion and sediment yield. For erosion and sediment estimation one can use statistical and empirical methods. This needs to identify land unit map and the map of effec...

Journal: :Journal of dentistry for children 2005
Esber Caglar Betul Kargul Ilknur Tanboga Adrian Lussi

The aim of this study was to evaluate the prevalence, clinical manifestations, and etiology of dental erosion among children. A total of 153 healthy, 11-year-old children were sampled from a downtown public school in Istanbul, Turkey comprised of middle-class children. Data were obtained via: (1) dinical examination; (2) questionnaire; and (3) standardized data records. A new dental erosion ind...

Journal: :international journal of reproductive biomedicine 0
tahmineh farajkhoda robab latifnejad roudsari mahmoud abbasi

background: research in reproductive health (rh) has been located in the core of women’s health research. providing accurate information through conducting scientific and controlled research is essential, but increased number of research in the world especially in developing countries in rh area in order to introduce advanced technologies has been resulted in much unethical, illegal and abusive...

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