نتایج جستجو برای: erosion surface

تعداد نتایج: 660965  

Journal: :Veterinary and comparative orthopaedics and traumatology : V.C.O.T 2009
R Daems L A Janssens Y M Béosier

One hundred and forty-five stifles of client-owned dogs that underwent corrective surgery for congenital medial patellar luxation were inspected for cartilage erosion on the articular surface of the patella. The lesions were mapped in surface percentage ranges of 20% and by location. Two-thirds of the patellae had cartilage erosion. Cartilage erosion varied between 0 and 100% of the total patel...

2000
Ahmed Hassanein Isak Konkashbaev

Loss of plasma co@nement causes surface and structural damage to plasma-facing materials (PFMs) and remains a major obstacle for tokamak reactors. The deposited plasma energy results in surface erosion and structural failure. The surface erosion consists of vaporization, spallation, and liquid splatter of metallic materials, while the structural damage includes large temperature increases in st...

2015
W H Arnold B. Haddad K. Schaper K. Hagemann C. Lippold Gh. Danesh

BACKGROUND The aim of this study was to investigate the influence of etching time with 15% hydrochloric acid (HCl) on the enamel surface destruction by studying the resulting roughness and erosion depth. METHODS The vestibular surfaces of 12 extracted, caries free human incisors were divided into four quadrants, and each quadrant was etched with 15% HCl for different numbers of etching cycles...

2017
Lei Zhang Jin-Zhong Lu Yong-Kang Zhang Hai-Le Ma Kai-Yu Luo Feng-Ze Dai

Effects of laser shock processing (LSP) on the cavitation erosion resistance of laser weldments were investigated by optical microscope (OM), scanning electron microscope (SEM) observations, roughness tester, micro hardness tester, and X-ray diffraction (XRD) technology. The morphological microstructures were characterized. Cumulative mass loss, incubation period, erosion rate, and damaged surf...

Ahmad Najafi, Hadis Khosravi, Shila Emamieh,

Background and Aim: Carbonated diet soda is the most common etiologic factor for dental erosion, and fluoride products have been proposed as an option for the preven-tion of that problem. This study evaluated the effect of Remin Pro and neutral sodium fluoride on the prevention of dental enamel erosion using profilometry. Materials and Methods: This study was conducted using an experimental-...

Splash erosion is recognized as the first stage in the process of erosion that results in bombardment of the soil's surface with rain drops. Two basic processes in soil erosion are the dispersion of soil particles by rain drops and the changes caused to the soil's structure, which are then moved by runoff. In this research, the effect of various rainfall intensity (60, 90 and 120 mm/hr) on the ...

2015
Dina Ma Ahmad Mostafa Dmytro Kevorkov Pawel Jedrzejowski Martin Pugh Mamoun Medraj Hugo F. Lopez

In this work, the Liquid Impingement Erosion (LIE) performances of deep-rolling (DR) treated and non-treated Ti64 were investigated. Various erosion stages, from the incubation to the terminal erosion stages, could be observed. A full factorial design of experiments was used to study the effect of DR process parameters (Feed Rate, Spindle Velocity, Number of Passes, Pressure) on the residual st...

Journal: :journal of water sciences research 2011
m saneie b.s mosavi

river banks are exposed to bank erosion and destruction. one of the river engineering goals is to provide human life requirements and reduce river danger. so spreading extent of this phenomenon, whose risk and other important factors must be recognized. using groins is one of the control ways that by accurate design and accurate performance, bank erosion control and field reclamation would be p...

Journal: :مرتع و آبخیزداری 0
عطااله کاویان استادیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری فریال حیاوی کارشناس ارشد آبخیزداری، دانشگاه شهر کرد مهدی بروغنی دانشجوی دکتری آبخیزداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس

splash erosion recognized as first stage of erosion process that results of bombing soil surface with rain drop. falling rain drops to soil surface resulted moving soil particles and destructing soil structure. at this research effects of various pam rate (0, 2, 4 and 6 kg.ha) on splash erosion on three soil textuere clay, silty clay and sandy clay loam was tested. simulations were done with ra...

2014
Sven D. Sommerfeld Zheng Zhang Marius C. Costache Sebastián L. Vega Joachim Kohn

Surface erosion has been recognized as a valuable design tool for resorbable biomaterials within the context of drug delivery devices, surface coatings, and when precise control of strength retention is critical. Here we report on high tensile strength, aromatic-aliphatic polycarbonates based on natural phenols, tyrosol (Ty) and homovanillyl alcohol (Hva), that exhibit enzymatic surface erosion...

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