نتایج جستجو برای: roll wear

تعداد نتایج: 39991  

1999
Paolo Ghirardato Jonathan N. Katz

We address the so-called “roll-off” phenomenon: Selective abstention in multiple elections. We present a discuss a novel model of decision making by voters that explains this as a result of differences in quality and quantity of information that the voters have about each election. In doing so we use a spatial model that differs from the Euclidean one, and is more naturally applied to modelling...

F. Mahzoon, M. E. Bahrololoom, N. Afsar Kazerooni, S. A. Behgozin,

The wear mechanism of plasma electrolytic nitrocarburised (PEN/C) 316L stainless steel samples was studied after a pin on disc wear test. The surface morphology of samples after application of PEN/C process was studied using scanning electron microscope technique. The sliding tracks resulting from the wear tests on the treated specimens indicated no signs of plastic deformation and adhesive wea...

Journal: :journal of modern processes in manufacturing and production 2013
mehdi jahangiri mazdak hashempour hekmat razavizadeh hamid reza rezaie

in this work, homogeneous thermochemical co-precipitation method was used to fabricate w-25wt%cu nanocomposite. synthesized nanocomposite powder was calcined and reduced. a hydrogen atmosphere sintering at 1200oc for 105 consolidated the product up to a density close to 98% theoretical density. wear experiment were carried out using a pin-ondisc set up at three normal loads of 5, 10 and 15 n an...

Journal: :Frontiers in Bioengineering and Biotechnology 2023

In equine dentistry, the physiological incisor occlusal surface is visually perceived as a plane with distinct inclination to head’s coronal plane, extending rostro-ventrally caudo-dorsally. To better understand formation of this inclined and its connection dental wear, we investigated hypothesis that it arises from masticatory movements considerable distance between mandibular articular heads ...

Journal: :international journal of iron & steel society of iran 2012
gh. zirehpour r. shoja razavi e. moayerifar

as the turbine industries need to manufacture turbine blades made of martensitic stainless steel aisi 420 with high toughness and wear resistance, local laser hardening has become more and more important. in this research, surface of the samples was initially hardened by high-power pulsed laser beam; then, optimum parameters of hardening were calculated and wear resistance of surface hardened s...

Journal: :journal of modern processes in manufacturing and production 2015
hassan gheisari ebrahim karamian

most of the materials used in the industry of aero-engine components generally consist of titaniumalloys. advanced materials, because of their excellent combination of high specific strength, lightweight and general corrosion resistance. in fact, chemical wear resistance of aero-engine alloyprovides a serious challenge for cutting tool material during the machining process. the reductionin cutt...

2008
Takeshi Chiba Masahide Yamaguchi

We derive slow-roll conditions for a scalar field which is non-minimally coupled with gravity in a consistent manner and express spectral indices of scalar/tensor perturbations in terms of the slow-roll parameters. The conformal invariance of the curvature perturbation is proved without linear approximations. Rapid-roll conditions are also derived, and the relation with the slow-roll conditions...

2002
J. P. Bender J. F. Wager S. Park B. L. Clark D. A. Keszler

Interest in organic and polymer light-emitting devices (OLEDs and PLEDs) has exploded in recent years, in part because of the ability to create these devices on flexible plastic substrates. This is advantageous in producing wearable or lightweight displays, as well as utilizing low-cost roll-to-roll processing techniques. For the first time, we present crystalline refractory inorganic thin film...

2016
Kati Miettunen Minna Toivola Ghufran Hashmi Jyri Salpakari Imran Asghar Peter Lund

Rights: © 2011 Elsevier BV. This is the post print version of the following article: Miettunen, Kati & Toivola, Minna & Hashmi, Ghufran & Salpakari, Jyri & Asghar, Imran & Lund, Peter. 2011. A carbon gel catalyst layer for the roll-to-roll production of dye solar cells. Carbon. Volume 49, Issue 2. 528-532. ISSN 0008-6223 (printed). DOI: 10.1016/j.carbon.2010.09.05 which has been published in fi...

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