Correlation of Roundness and Sphericity with Complex Fourier Descriptors of 2-Dimensional Projected Images of Soil Particles

2021 ◽  
Author(s):  
Taesik Kim ◽  
Young-Hoon Jung
Keyword(s):  
Fourier Descriptors ◽  
Soil Particles

Effects of sex, stock, and environment on the shape of known-age Atlantic cod (Gadus morhua) otoliths

2004 ◽  
Vol 61 (2) ◽  
pp. 158-167 ◽  
Author(s):  
M Cardinale ◽  
P Doering-Arjes ◽  
M Kastowsky ◽  
H Mosegaard
Keyword(s):  
Shape Analysis ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Fourier Descriptors ◽  
Faroe Islands ◽  
Stock Identification ◽  
Relative Importance ◽  
Age Classes ◽  
Otolith Shape ◽  
Left And Right

The effects of sex, stock, and environment on the shape of known-age Atlantic cod (Gadus morhua) otoliths from the Faroe Islands were investigated. Moreover, the feasibility of otolith shape analysis for stock identification was evaluated. The shape was described by using several normalized Fourier descriptors and morphometric variables. There were no consistent differences between the left and right otoliths and between sexes within different age classes, stocks, and environments. With our experimental design, we could evaluate the relative importance of genetic and environmental conditions (water temperature and diet regime) on otolith shape and morphometrics. Using otolith shape, cod individuals were significantly separated into Bank and Plateau stocks. Total classification success was between 79% and 85% between stocks and between 85% and 96% between environments for the different age classes. The significant differences in otolith shape between Faroe Bank and Faroe Plateau cod stocks provided a phenotypic basis for stock separation. Stock and environmental influences were substantial in determining the shape of cod otoliths.

scholarly journals A new approach for simulating the redistribution of soil particles by water erosion: A marker-in-cell model

2012 ◽  
Vol 117 (F4) ◽  
pp. n/a-n/a ◽  
Author(s):  
James R. Cooper ◽  
John Wainwright ◽  
Anthony J. Parsons ◽  
Yuichi Onda ◽  
Tomomi Fukuwara ◽  
...  
Keyword(s):  
Cell Model ◽  
Water Erosion ◽  
New Approach ◽  
Soil Particles

scholarly journals Evaluation of Migration of Cesium-137 Adsorbed on Fine Soil Particles through Natural Aerated Soil Layer

1991 ◽  
Vol 28 (3) ◽  
pp. 248-254 ◽  
Author(s):  
Hiromichi OGAWA ◽  
Shinichi TAKEBE ◽  
Tadatoshi YAMAMOTO
Keyword(s):  
Soil Layer ◽  
Soil Particles ◽  
Fine Soil ◽  
Cesium 137

scholarly journals Discrete element modelling of methane hydrate soil sediments using elongated soil particles

2016 ◽  
Vol 80 ◽  
pp. 397-409 ◽  
Author(s):  
Yanxin Yu ◽  
Yi Pik Cheng ◽  
Xiaomin Xu ◽  
Kenichi Soga
Keyword(s):  
Methane Hydrate ◽  
Discrete Element ◽  
Discrete Element Modelling ◽  
Element Modelling ◽  
Soil Particles ◽  
Soil Sediments

Characteristics of clay minerals in soil particles of two Alfisols in China

2016 ◽  
Vol 120 ◽  
pp. 51-60 ◽  
Author(s):  
Zhi Yi Zhang ◽  
Li Huang ◽  
Fan Liu ◽  
Ming Kuang Wang ◽  
Qing Ling Fu ◽  
...  
Keyword(s):  
Clay Minerals ◽  
Soil Particles

Agresivitatea pluvială și periculozitatea exceselor pluviometrice în posibilitatea declanșării proceselor erozionale

2019 ◽  
Author(s):  
Maria Nedealcov ◽  
Keyword(s):  
Soil Erosion ◽  
Agricultural Land ◽  
Regional Climate ◽  
Atmospheric Precipitation ◽  
Regional Level ◽  
Soil Particles

Excessive amounts of atmospheric precipitation can cause intense soil erosion, landslides, inundation and floods. Torrential rains have the force to displace and transport soil particles, so the risk of soil erosion becomes real, as many times as atmospheric precipitations have a devastating character. In this context, it is extremely useful to know the particularities of the torrential rains in the current regional climate. At this stage, the Fournier (IF) pluvial aggression index is becoming more and more prevalent. This paper is dedicated to the use of this index with the pluviometric Excess Danger index (IPP) developed at regional level. The results obtained show close concordance between these indices for temporal estimations. Spatial analyzes highlight the role of slopes' orientation in distributing the pluviometric Excess Danger index and slopes' degree of inclination in the case of the Fournier pluvial aggression index. The results obtained are useful in the efficient use of agricultural land and in the elaboration of measures for the improvement of degraded soils.

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