Results 31 to 40 of about 23,181 (222)

Geographical Variation in Skull Morphology of a Wild Rodent (<i>Orientallactaga sibirica</i>) Across Environmental Gradients. [PDF]

open access: yesEcol Evol
The greatest morphological differences are observed between the northeastern regions of China and the Qinghai‐Tibet regions. Elevation and temperature are the primary climatic factors causing morphological variation. Compared to the current period, the future suitable habitat area for Five‐toed jerboa is expected to decrease and shift toward higher ...
Yang C   +8 more
europepmc   +2 more sources

Point distribution form model for spruce stems (Picea abies [L.] Karst.)

open access: yesJournal of Forest Science, 2002
The paper deals with the construction of a point distribution form model for spruce stems. This model is based on the principal components analysis of variance-covariance matrix formed for the Procrustes residuals.
M. Křepela
doaj   +1 more source

Generalized Procrustes Analysis

open access: yesPsychometrika, 1975
Suppose Pi(i) (i = 1, 2, ..., m, j = 1, 2, ..., n) give the locations of mn points in p-dimensional space. Collectively these may be regarded as m configurations, or scalings, each of n points in p-dimensions. The problem is investigated of translating, rotating, reflecting and scaling the m configurations to minimize the goodness-of-fit criterion Σi ...
openaire   +2 more sources

Covariance Weighted Procrustes Analysis [PDF]

open access: yes, 2016
We revisit the popular Procrustes matching procedure of landmark shape analysis and consider the situation where the landmark coordinates have a completely general covariance matrix, extending previous approaches based on factored covariance structures.
Brignell, CJ, Browne, WJ, Dryden, IL
openaire   +1 more source

Do cladistic and morphometric data capture common patterns of morphological disparity? [PDF]

open access: yes, 2015
The distinctly non-random diversity of organismal form manifests itself in discrete clusters of taxa that share a common body plan. As a result, analyses of disparity require a scalable comparative framework.
Adams   +40 more
core   +5 more sources

Translational genetic modelling of 3D craniofacial dysmorphology: elaborating the facial phenotype of neurodevelopmental disorders through the prism of schizophrenia [PDF]

open access: yes, 2017
Purpose of Review: In the context of human developmental conditions, we review the conceptualisation of schizophrenia as a neurodevelopmental disorder, the status of craniofacial dysmorphology as a clinically accessible index of brain ...
Bowman, Adrian W.   +3 more
core   +1 more source

Evaluating the Predictive Power of Ordination Methods in Ecological Context

open access: yesMathematics, 2018
When striving for the ordination methods best predicting independently measured site factors, the following questions arise: does the optimal choice depend on the kind of biological community analysed?
Otto Wildi
doaj   +1 more source

The qualitative assessment of responsiveness to environmental challenge in horses and ponies. [PDF]

open access: yes, 2008
The responsiveness of 10 horses and 10 ponies to environmental challenge (represented by an open field test) was assessed using a qualitative approach based on free choice profiling methodology (FCP), which gives observers complete freedom to choose ...
BORDI, ALDO   +5 more
core   +1 more source

Reply to “Comment on ‘De Novo Reconstruction of 3D Human Facial Images From DNA Sequence’”

open access: yesAdvanced Science, EarlyView.
ABSTRACT This manuscript is a formal response to the Comment by Wagner et al. regarding our publication “De Novo Reconstruction of 3D Human Facial Images from DNA Sequence.” We clarify the methodological rationale, analytical procedures, and scientific scope of our original study, and we address several misconceptions arising in the Comment. We further
Mingqi Jiao   +4 more
wiley   +1 more source

Investigating Shape Variation Using Generalized Procrustes Analysis and Machine Learning

open access: yesApplied Sciences, 2022
The biological investigation of a population’s shape diversity using digital images is typically reliant on geometrical morphometrics, which is an approach based on user-defined landmarks.
Wilfried Wöber   +5 more
doaj   +1 more source

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