نتایج جستجو برای: roundness factor
تعداد نتایج: 844816 فیلتر نتایج به سال:
BACKGROUND The aim of this study was to compare the cytomorphometric characteristics of the buccal cells of Behçet's disease patients with those of healthy controls. METHODS This case-control study compared a group of 30 patients with Behçet's disease with an age- and gender-matched control group of 30 healthy individuals. The buccal mucosal smears were stained using the Papanicolaou techniqu...
Analysis of the shape properties of fish otolith is one way to identify stocks of different species in the marine environment. Length, width, area, perimeter, form factor, aspect ratio, roundness, circularity, ellipticity and rectangularity analyses of otoliths were undertaken to assess patterns of spatial and temporal stock structure of a wide-ranging fish, the Arabian yellow fin sea bream Aca...
To investigate age-related changes in the shape of trachea, normal male volunteers (n = 83, mean +/- SD: 47.7 +/- 20.2 years old) underwent inspiratory CT scans at full inspiration and lung function tests. Subjects who showed VC < 80% predicted or FEV1 < 80% predicted on lung function tests were excluded. The CT data, which is located at 2.0 cm above the aortic arch, were transferred to a perso...
The shape of sedimentary particles is an important property, from which geographical hypotheses related to abrasion, distance of transport, river behavior, etc. can be formulated. In this paper, we use digital image analysis, especially discrete geometry, to automatically compute some shape parameters such as roundness, i.e. a measure of howmuch the corners and edges of a particle have been wor...
Article history: Received 29 October 2015 Received in revised form 18 December 2015 Accepted 19 December 2015 Available online 29 December 2015 Particle shape plays an important role in determining the engineering behaviour of granular materials. In this regard, characterisation and quantification of particle shape are essential for understanding the behaviour of granular materials. X-ray micro...
Accuracy and topography are significant indicators of precision machined high-quality surfaces. Case hardened steel (16MnCr5) was analyzed to obtain information about the effects technological data connections between accuracy (roundness) roughness parameters (Sa, Sz, Ssk, Sku). It found that feed rate has a influence on roundness parameters, there strong relationships these parameter values: c...
Recently, most of the conventional (industrial) materials such as steel, aluminum, and copper are being replaced by composite materials. Among various materials, CFRP material is one popular in many industries due to its excellent mechanical properties like-high strength, high modulus, compressive etc. However, micro hole EDM drilling challenging fiber orientation, uneven distribution conductin...
Otolith shape analysis is one way to identify stocks of different fish species in the marine environment. Length, width, area, perimeter, form factor, aspect ratio, roundness, circularity, ellipticity and rectangularity analyses of otoliths were undertaken to assess patterns of spatial and temporal stock structure of a wide-ranging fish, the Arabian yellow fin sea bream Acanthopagrus arabicus. ...
Wind, in the duration of its erosional process, affects considerable changes in a grain's morphologyfrom its removal (detachment) step to sedimentation. In other word, a grain undergoes its gradualevolution during the transit process. In this project, the maturation of Aeolian sand grains had beenstudied upon as based on texture maturity indicator which includes: sorting, mean size grain, round...
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