Size and shape analysis ofTrioza erytreaeDel Guercio (Hemiptera: Triozidae), vector of citrus huanglongbing disease

2018 ◽  
Vol 75 (3) ◽  
pp. 760-771 ◽  
Author(s):  
Owusu F Aidoo ◽  
Chrysantus M Tanga ◽  
Thomson M Paris ◽  
Sandra A Allan ◽  
Samira A Mohamed ◽  
...  
Keyword(s):  
Shape Analysis ◽  
Size And Shape ◽  
Citrus Huanglongbing

Shape difference of mud clasts depending on depositional facies: application of newly modified elliptic Fourier analysis to hybrid event beds

2020 ◽  
Vol 90 (10) ◽  
pp. 1410-1435
Author(s):  
Sojiro Fukuda ◽  
Hajime Naruse
Keyword(s):  
Fourier Analysis ◽  
Shape Analysis ◽  
Transport Processes ◽  
Transport Systems ◽  
Shape Parameters ◽  
Elliptic Fourier Analysis ◽  
Depositional Facies ◽  
Size And Shape ◽  
Muddy Sediments ◽  
Hybrid Event

ABSTRACT Hybrid event beds are the deposits from sediment gravity flows that change their rheological behavior through their passage, entraining muddy sediments and damping turbulence. Muddy facies of hybrid event beds are often associated with abundant mud clasts which show a wide variety of size and shape. The variation of clast occurrence in hybrid event beds is expected to preserve the information of entrainment and transport processes of muddy sediments in submarine density currents. However, previous analyses of hybrid event beds have focused on describing the overall clast occurrence rather than the statistical size and shape analyses because traditional shape parameters are incapable of characterizing the complex shape of mud clasts. Here, a new quantitative grain-shape analysis of mud clasts is conducted and allows visualization of the spatial variation of clast size and shape, which suggests the wide variety of origin and transport systems of entrained mud clasts. This new method revises the traditional elliptic Fourier analysis, substituting Fourier power spectra (FPS) for traditional elliptic Fourier descriptors to overcome the mirror-wise shape problem. Further, principal-component analysis is shown to capture significant shape attributes more effectively than traditional shape parameters. The proposed method is applied to mud clasts in sediment-gravity-flow deposits in the lower Pleistocene Otadai Formation, central Japan. Results imply that there are distinctive shape and size differences of mud clasts that are strongly associated with depositional facies rather than the distance from the source. The clasts have a higher angularity than other facies in the debrite intervals in hybrid event beds. It is also shown that clasts in sandy, structureless facies have different characteristics in shapes based on elongation and convexity compared to laminated facies. Comparison between different shape-analysis methods demonstrates that none of the traditional methods are able to visualize these trends as effectively as the method presented herein. These results highlight the importance of the quantitative shape analysis of sediment grains and the effectiveness of FPS-based elliptic Fourier analysis.

Defining phytochemical phenotypes: size and shape analysis of phenolic compounds in oaks (Fagaceae, Quercus) of the Chihuahuan Desert

2006 ◽  
Vol 84 (8) ◽  
pp. 1233-1248 ◽  
Author(s):  
Christopher T. Yarnes ◽  
William J. Boecklen ◽  
Kati Tuominen ◽  
Juha-Pekka Salminen
Keyword(s):  
Shape Analysis ◽  
Chihuahuan Desert ◽  
Relative Concentration ◽  
Ecological Factors ◽  
Interspecific Variation ◽  
White Oak ◽  
Phenolic Metabolism ◽  
Size And Shape ◽  
Time Update ◽  
Black Oak

Interspecific variation in phenolic metabolism across plant species has been correlated to numerous ecological factors, yet generalities concerning the ecological role(s) of phenolics remain elusive. Moreover, studies of allometric variation (absolute and relative concentration) in phenolic metabolism are rare despite the importance of each to ecological interactions. In this study, we characterize individual phenolics in a group of 12 oak species from the Chihuahuan Desert and examine interspecific variation in the absolute and relative concentrations of phenolics using size and shape analysis. Size and shape analysis was able to successfully identify those compounds that contribute most to the interspecific allometric variation in phenolics and classify the oak species on the basis of phenolic metabolism. White versus black oak subgenera were found to be most different in their phenolic composition, where the two black oak species contained fewer and less diverse phenolics. Within the 10 white oak species, a predominantly eastern white oak, Quercus muhlenbergii Engelmann, was found to vary significantly from the more widespread white oaks of the Chihuahuan Desert. We also report the occurrence of complex tannins in oaks of North America for the first time, update proposed pathways of ellagitannin biosynthesis in oaks, and discuss the applicability of size and shape analysis to ecological studies of phenolics.

Size and shape analysis of gunflints from the British shipwreck Deltebre I (1813), Catalonia, Spain: a geometric morphometric comparison of unused and used artefacts

2019 ◽  
Vol 11 (12) ◽  
pp. 6569-6582
Author(s):  
Nicolás C. Ciarlo ◽  
Judith Charlin ◽  
Jimena Alberti ◽  
Silvana Buscaglia ◽  
Gustau Vivar Lombarte ◽  
...  
Keyword(s):  
Shape Analysis ◽  
Geometric Morphometric ◽  
Size And Shape

A study on 3D virtual body formation and deformation by body shape analysis

2019 ◽  
Vol 31 (6) ◽  
pp. 755-776
Author(s):  
Heekyung Jang ◽  
Jianhui Chen
Keyword(s):  
Body Size ◽  
Shape Analysis ◽  
Body Shape ◽  
The Body ◽  
Deformation Model ◽  
Content Type ◽  
Body Formation ◽  
Size And Shape ◽  
Virtual Body ◽  
Body Shape Analysis

Purpose The purpose of this paper is to use body shape analysis and develop a 3D virtual body formation and deformation model that can accurately express size and shape. Design/methodology/approach In this paper, 1,882 sets of direct measurement data of Korean women in their 20s (19–29 years) were analyzed. These data sets were sourced from the sixth and seventh “Size Korea” anthropometric survey data. Through body shape analysis, the authors classified them into seven body types and selected their representative bodies. A 2D image based on the height, breadth, depth and length was first formed, and the representative virtual body was modeled using the polygon technique. The authors calculated the grading ratios for each body type according to the clothing sizing system, and modified the virtual body size type by morphing technique. Findings In order to accurately evaluate the fit in a virtual fitting system, it is necessary to study the body size and shape of the target age; this makes it possible to form virtual body reflecting the size and shape. Originality/value In this paper, the authors propose a new 3D virtual body formation method that is more accurate in shape and size compared to the present system. Through this, it will be possible to grasp the accurate simulation state in the virtual fitting system, and thereby evaluate the accurate fit.

scholarly journals Crystal size and shape analysis of Pt nanoparticles in two and three dimensions

2006 ◽  
Vol 26 ◽  
pp. 367-370 ◽  
Author(s):  
L Cervera Gontard ◽  
R E Dunin-Borkowski ◽  
D Ozkaya ◽  
T Hyde ◽  
P A Midgley ◽  
...  
Keyword(s):  
Shape Analysis ◽  
Crystal Size ◽  
Pt Nanoparticles ◽  
Three Dimensions ◽  
Size And Shape
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