The body mass estimation from human talus: inductive approach and 3D morphometric study (919.1)
2
Citation
0
Reference
10
Related Paper
Citation Trend
Abstract:
The body mass (BM) that is gauging physical characteristics of individuals is still challengeable information to acquire from the skeletal remains in the fields of biological anthropology. The aim of this study is to develop the BM‐predicting equations from the talus using 3D morphometrics and investigate whether the estimated BM can be used as a biological profile in forensic anthropology.The right‐side talus in type of 3D models obtained from 76 Koreans (32 males and 44 females) of known stature, bi‐iliac breadth, and femoral head diameter were used. In this study, the inductive approach is needed in order to construct information about the weight for the CT‐based Digital Korean Collection, applying morphometric and mechanical method for assuming the weight of the individuals from the collection. For developing BM‐predicting equations, nine variables of 3D talus were measured through Mimics software (Materialise NV, Leuven, Belgium) and statistical analyses were performed using SPSS 20.0 (SPSS Inc., Chicago, IL). Overall this study, analysis of covariance found no statistically significant differences between sexes in most talar measurements except that talar length is just not. The linear regression analyses revealed that talar height was the most highly correlated measurement with the BM ( R 2 = 0.702, SEE = 3.73), followed by talar length ( R 2 = 0.701, SEE = 3.74) and talar width ( R 2 = 0.631, SEE = 4.15). Through the multiple regression analysis, four measurements of talar height, talar length, trochlear breadth and head height were selected as a BM‐predicting equations by stepwise selection with increasing the coefficient of determination (Adjusted R 2 = 0.779, SEE = 3.19). In conclusion, the BM‐predicting equations were developed and expected this study do role as a stimulus of further study for assessment the effectiveness of anthropological body mass estimation serving as a biological profile. Grant Funding Source : Supported by the National Research Foundation of Korea (NRF‐2013R1A1A2009306)Keywords:
Morphometrics
Body height
Inductive method
Forensic anthropology
Perimeter
Morphometrics
Variation (astronomy)
Morphology
Cite
Citations (81)
Morphometrics
Morphology
Cite
Citations (0)
Morphometrics
Cite
Citations (0)
71 undergraduate majors in elementary education were given a task to assess their understanding of perimeter and area. Examination of responses indicated students' understanding of perimeter and area is very formula-based and their misunderstandings are often based on applying area calculation strategies to a perimeter calculation problem.
Perimeter
Cite
Citations (1)
Abstract The recent expansion of a variety of morphometric tools has brought about a revolution in the comparison of morphology in the context of the size and shape in various fields including entomology. First, an overview of the theoretical issues of geometric morphometrics is presented with a caution about the usage of traditional morphometric measurements. Second, focus is then placed on two broad approaches as tools for geometric morphometrics; that is, the landmark‐based and the outline‐based approaches. A brief outline of the two methodologies is provided with some important cautions. The increasing trend of entomological studies in using the procedures of geometric morphometrics is then summarized. Finally, information is provided on useful toolkits such as computer software as well as codes and packages of the R statistical software that could be used in geometric morphometrics.
Morphometrics
Landmark
Entomology
Cite
Citations (105)
Detection of morphologically indistinguishable cryptic species implies using an integrative taxonomic approach with a combination of molecular, contemporary morphological, ecological and other relevant analyses. Within a contemporary morphological analysis, two approaches are commonly used in hoverfly taxonomy: a geometric morphometric analysis of the wing and surstyle shape. Here, the importance of the R4+5 vein shape is tested in cryptic species delimitation within four Merodon species groups using linear and semilandmark geometric morphometric analyses. As expected, geometric morphometrics showed a stronger resolution compared to linear morphometrics. Linear morphometrics failed to detect differences related to sexual dimorphism or differences among the species M. pruni and M. obscurus. However, all cryptic species and sexes were separated with high significance based on the R4+5 vein shape. Moreover, obtained results concurred with the landmark-defined wing shape and molecular results published in previous studies. Additionally, combining two characters, the semilandmark R4+5 vein shape and the landmark-defined wing shape, provided more detailed and precise insights into the shape differences. Our results showed that the R4+5 vein shape stands out as an important character in species delimitation of hoverflies where the sinuation of this vein is present. Therefore, it can be beneficial as a single character or in combination with a landmark-based wing shape analysis.
Morphometrics
Landmark
Sexual dimorphism
Species complex
Morphological Analysis
Cite
Citations (1)
Estimation of stature is a major cause of concern in forensic medicine and forensic anthropology. It becomes difficult to predict the physical identification of an individual when only fragmentary remains of dead body are brought for postmortem. Physical reconstruction from such remains depends upon the fact that various body parts exhibit consistent ratios when compared to total height of a person. Present study is an endeavor to generate formula for estimation of stature from combined length of forearm and hand in Jammu region of India. Results of present study reveal highly significant gender differences between the selected parameters necessitating the need for separate data for two sexes. A positive and significant correlation coefficient of 0.615 and 0.731 has been observed in the males and females in the present study. The regression equation for both sexes has been derived for practical use in anatomical, forensic and archeological investigations.
Forensic anthropology
Dead body
Body height
Identification
Cite
Citations (9)
Morphometrics
Subspecies
Centroid
Geometric analysis
Cite
Citations (151)
To study the intraspecies taxonomy of the Western honeybee (Apis mellifera), geometric morphometrics analyses can now replace the standard morphometry method, yet its availability for microtaxonomy of the Asian honeybee (Apis cerana F.) has not been reported. In order to assess effectiveness of geometric morphometrics analyses using the forewing in the microtaxonomy of the Asian honeybee, 180 individual worker bees were sampled from three sample sites, Jilin, Hainan, and Shaanxi, representing different habitats for A. cerana within China. Bees were analyzed by discrimination analysis using three methods: (1) standard morphometry method with 33 traditional characters, (2) simplified standard morphometry method with only 11 wing vein angles, and (3) geometric morphometrics analyses with 18 wing vein junctions. The results revealed that geometric morphometrics analyses could reflect the variability information of the forewing vein structures of A. cerana. Morphological differentiation at the three sample sites was identified. Cross-validation indicated the percentage of individuals falling into each sample site, were 98.3%, 95.0%, and 88.3% for Jilin, Hainan, and Shaanxi, respectively. Geometric morphometrics analyses produced classification results similar to those produced using the standard morphometry method, and it was superior for presenting the wing vein variability information compared to the simplified standard morphometry method. Therefore, we conclude that geometric morphometrics analyses could be efficient and effective in the microtaxonomy of A. cerana. Furthermore, geometric morphometrics is a potential method for resolving A. cerana subspecies classification issues.
Morphometrics
Apis cerana
Subspecies
Cite
Citations (6)
The perimeter of a polygon is the total length of its sides, so that a regular polygon with n sides of length l cm has perimeter nl cm. There is no general formula for the perimeter of irregular polygons but when the dimensions are known the perimeter is easily calculated.
Perimeter
Polygon (computer graphics)
Rectilinear polygon
Cite
Citations (1)