نتایج جستجو برای: surface impact

تعداد نتایج: 1366497  

M Akhondizadeh, M Fooladi Mahani M Rezaeizadeh S.H Mansouri

Impact wear can be defined as the wear of a solid surface that is due to percussion, which is a repetitive exposure to dynamic contact by another solid body. It generally has the devastating effects on the mechanical elements and causes the equipments to shift away from their normal performance. Impact wear has not been studied as extensive as other wear mechanisms and as a result information o...

2007
T. Takata T. J. Ahrens R. J. Phillips

A paraboloidal bow shock model is developed in order to estimate the surface distribution of gas shock-induced modifications surrounding Venusian impact craters. We apply two-dimensional oblique shock dynamics to describe a three-dimensional paraboloidal-shaped bow shock impinging upon an assumed incompressible Venusian surface. The effects of the hypersonic atmospheric shock acting on the Venu...

Urbanization brings biophysical changes in the composition of the landscape. Such change has an impact on the thermal environment locally. The urban mosaic of land use and land cover is thus characteristically composed of local climate zones. The spatial variation in the land surface temperature across specific zone is studied for Bhopal city. The objective of the study was to understand how th...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
omid doosti irani mahmood golzarian mohammad hosein aghkhani hasan sadrnia

introduction: high percentage of orchard products, such as apples, is wasted due to mechanical damages that cause fruit quality loss. damages due to static or dynamic pressure or impact are among very common mechanical damages that begin to bruise fruits. post-harvest bruise damage is a major cause for the loss in fruit quality. bruising means damaging fruit tissue and consequently physical cha...

2017
Thed N. van Leeuwen Paul F. Wouters

In this article, we present the results of an analysis that describes the research centered on Journal Impact Factors (JIFs). The purpose of the analysis is to make a start of studying part of the field of quantitative science studies that relates to the most famous and classic bibliometric indicator around and to see what characteristics apply to the research on JIFs. In this article, we start...

2017
Lin Zhang Ronald Rousseau Gunnar Sivertsen

The scientific foundation for the criticism on the use of the Journal Impact Factor (JIF) in evaluations of individual researchers and their publications was laid between 1989 and 1997 in a series of articles by Per O. Seglen. His basic work has since influenced initiatives such as the San Francisco Declaration on Research Assessment (DORA), the Leiden Manifesto for research metrics, and The Me...

2003
A. S. Kadyrov A. M. Mukhamedzhanov A. T. Stelbovics

A relationship between the total wave function describing electron-impact ionization of hydrogen and the one representing scattering of two electrons and a proton in the continuum is revealed. On the basis of this relationship, forms of the scattered wave for the ionization process valid in all asymptotic domains are obtained. When all interparticle distances become large, the new wave function...

Journal: :Collegium antropologicum 2009
Nikola Petricević Asja Celebić Milan Papić Ksenija Rener-Sitar

Purpose of this study was to develop a Croatian version of the Oral Health Impact Profile questionnaire (OHIP--CRO49), following the accepted cross-cultural adaptation technique guidelines. The original version was translated by using a forward-backward translation method. The psychometric properties of the OHIP-CRO49 were tested. To test the construct validity 163 randomly selected subjects an...

Journal: :Geospatial health 2012
Mirko S Winkler Gary R Krieger Mark J Divall Burton H Singer Jürg Utzinger

Development and implementation of large-scale industrial projects in complex eco-epidemiological settings typically require combined environmental, social and health impact assessments. We present a generic, spatio-temporal health impact assessment (HIA) visualization, which can be readily adapted to specific projects and key stakeholders, including poorly literate communities that might be aff...

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