scholarly journals Surface Micro Topography Measurement Using Interferometry

Author(s):  
Dahi Ghareab
Keyword(s):  
2014 ◽  
Vol 51 (2) ◽  
pp. 41-54 ◽  
Author(s):  
G. Springis ◽  
J. Rudzitis ◽  
A. Avisane ◽  
A. Leitans

Abstract One of the principal objectives of modern production process is the improvement of quality level; this means also guaranteeing the required service life of different products and increase in their wear resistance. To perform this task, prediction of service life of fitted components is of crucial value, since with the development of production technologies and measuring devices it is possible to determine with ever increasing precision the data to be used also in analytical calculations. Having studied the prediction theories of wear process that have been developed in the course of time and can be classified into definite groups one can state that each of them has shortcomings that might strongly impair the results thus making unnecessary theoretical calculations. The proposed model for wear calculation is based on the application of theories from several branches of science to the description of 3D surface micro-topography, assessing the material’s physical and mechanical characteristics, substantiating the regularities in creation of the material particles separated during the wear process and taking into consideration definite service conditions of fittings.


2017 ◽  
Vol 49 (4) ◽  
pp. 1255-1270 ◽  
Author(s):  
Bowei Yu ◽  
Gaohuan Liu ◽  
Qingsheng Liu ◽  
Jiuliang Feng ◽  
Xiaoping Wang ◽  
...  

Abstract Large gullies occur globally and can be classified into four main micro-topographic types: ridges, plane surfaces, pipes and cliffs. Afforestation is an effective method of controlling land degradation worldwide. However, the combined effects of afforestation and micro-topography on the variability of soil moisture remain poorly understood. The primary objectives of this study were to determine whether afforestation affects the spatial pattern of the root-zone (0–100 cm) soil moisture and whether soil moisture dynamics differ among the micro-topographic types in gully areas of the Chinese Loess Plateau. The results showed that in the woodland regions, the spatial mean moisture values decreased by an average of 6.2% and the spatial variability increased, as indicated by the standard deviation (17.1%) and the coefficient of variation (22.2%). In general, different micro-topographic types exerted different influences on soil moisture behavior. The plane surface presented the largest average soil moisture values and the smallest spatial variability. The lowest soil moisture values were observed in the ridge, mainly due to the rapid drainage of these areas. Although pipe woodland region can concentrate surface runoff during and after rainfall, the larger trees growing in these areas can lead to increased soil moisture evapotranspiration.


2014 ◽  
Vol 72 (9-12) ◽  
pp. 1639-1645 ◽  
Author(s):  
Tao Chen ◽  
Suyan Li ◽  
Bangxin Han ◽  
Guangjun Liu

2018 ◽  
Vol 47 (1) ◽  
pp. 174-189 ◽  
Author(s):  
Zacharie Toth ◽  
Matt Roi ◽  
Emily Evans ◽  
J. Tracy Watson ◽  
Daemeon Nicolaou ◽  
...  

2017 ◽  
Author(s):  
Rachel Opitz ◽  
Clement Laplaige ◽  
Catherine Fruchart ◽  
Gilles Bossuet

The Essarté workshop area, dating to the Classical period, is situated in the town of Mathay (Doubs). Excavated in the 1980s and 90s, it has been interpreted as an area specializing in ceramics production. This study of this area takes place in the context of an ongoing, broader project focused on the ancient town of Mandeure-Mathay (Epomanduodurum) and its surroundings, currently conducted within the framework of a PCR (collective research project). To undertake a more detailed study of the Essarté area fieldwalking surveys were carried out in 2006 and a synthesis of previous excavations, based on the available documentation, was completed in 2009. Geophysical surveys were conducted in 2009 and 2010. In addition, a LiDAR survey of Mandeure-Mathay and its surroundings realized in 2009 included the Essarté area. This paper contextualizes the data provided by excavations and aerial surveys carried in the 1980s and 90s by integrating it with the data obtained through the magnetometry survey – providing additional information on sub-surface features - and the data obtained through fieldwalking and LiDAR (Light Detection And Ranging) surveys - used to characterize the micro-topography of the terrain surface and associated materials in detail. This new study, in addition to adding details to the existing picture of the Essarté area, demonstrates that this locale was used as a burial area prior to the Roman phase of the site


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