Results 111 to 120 of about 23,397 (235)

Wari Lithic Technology on the Northern Coast of the Andes: Geochemical, 2D Geometric Morphometric, and Technological Analyses of Obsidian Bifaces From San José de Moro

Archaeometry, EarlyView.
ABSTRACT This study examines Wari obsidian production in a cache of 39 bifaces found at the Late Moche site of San José de Moro (Jequetepeque Valley, North Coast of Peru, 700–850 ad). Portable X‐ray fluorescence, geometric morphometric, and technological analyses were used to investigate raw material provenance and bifacial production.
Antonio Pérez‐Balarezo, Luis Jaime Castillo, Jalh Dulanto   +2 more
wiley   +1 more source

Crushing and Cutting: Shape Variation and Morphological Integration Between the Claws of Two Swimming Crab Species (Brachyura: Portunidae)

Acta Zoologica, EarlyView.
ABSTRACT This study investigated shape variations and morphological integration between the components of crusher and cutter claws in two species of swimming crabs, Callinectes danae and Callinectes ornatus. The propodi and dactyli of the claws were analysed in males and females of both species, using geometric morphometric techniques to identify ...
Julia Tadiotto, Alexandre Ribeiro da Silva, Julia Fernandes Perroca, Rogerio Caetano Costa, Caio Santos Nogueira   +4 more
wiley   +1 more source

3D - Geomorphometrics tooth shape analysis in hypodontia

Frontiers in Physiology, 2014
Assessment of tooth morphology is an important part of the diagnosis and management of hypodontia patients. Several techniques have been used to analyze tooth form in hypodontia patients and these have shown smaller tooth dimensions and anomalous tooth ...
Ibrahim eAl-Shahrani, Wendy eDirks, Nicholas eJepson, Khaled eKhalaf   +3 more
doaj   +1 more source

Geometric Morphometrics Reveal Body Shape Variation in Freshwater Shrimps of the Genus Macrobrachium Lacking a Mandibular Palp (Formerly Pseudopalaemon Sollaud, 1911) (Decapoda: Palaemonidae)

Acta Zoologica, EarlyView.
ABSTRACT Shape variation in the cephalothorax of Macrobrachium species without mandibular palp using geometric morphometrics was used as a tool to support species differentiation and propose new diagnostic characters for taxonomic identification.
Thaís Arrais Mota, Ana Carla Soares da Silva, Lucas Jhones de Santana Neves, Carlos Eduardo Rocha Duarte Alencar, Fabrício Lopes Carvalho   +4 more
wiley   +1 more source

La aplicación de Técnicas de Ordenación Multivariadasen la Entomología Application of Multivariate ordenation methods in Entomology

Revista de la Sociedad Entomológica Argentina, 2004
Los métodos de ordenación son herramientas multivariadas muy utilizadas en la Entomología. En este foro se presenta una introducción a éstos y breves explicaciones sobre distintas Técnicas: Análisis de Componentes Principales (ACP), Análisis de ...
Arnaldo Mangeaud
doaj  

Exploring motion using geometric morphometrics in microscopic aquatic invertebrates: ‘modes’ and movement patterns during feeding in a bdelloid rotifer model species

Movement Ecology
Background Movement is a defining aspect of animals, but it is rarely studied using quantitative methods in microscopic invertebrates. Bdelloid rotifers are a cosmopolitan class of aquatic invertebrates of great scientific interest because of their ...
Andrea Cardini, Giulio Melone, Paul O’Higgins, Diego Fontaneto   +3 more
doaj   +1 more source

Comparative Anatomy of the Hyoid Apparatus in Various Dog Breeds: Insights From Clinical Imaging. [PDF]

Vet Med Sci
This study identifies breed‐related shape differences in the canine hyoid apparatus using geometric morphometrics. The results suggest that skull type influences hyoid morphology, with potential functional implications for swallowing, vocalisation and tongue movement.
Altundağ Y, Ozkan E, Yiğit F, Avanus K, Hadziomerovic N, Szara T, Spataru C.   +6 more
europepmc   +2 more sources

Craniofacial Dysmorphology Associated With Phelan–McDermid Syndrome Using Three‐Dimensional Morphometrics

Clinical Genetics, EarlyView.
Using 3D morphometrics quantifies genetic contribution to head and face development. ABSTRACT Phelan–McDermid syndrome (PMS) frequently presents with distinctive facial features, although a typical facial phenotype for this condition has not been well characterized.
Katherine Weisensee, Sara M. Sarasua, Lior Rennert, Curtis Rogers, Katy Phelan, Kara Powder, Luigi Boccuto   +6 more
wiley   +1 more source

DIMENSIONALITY REDUCTION WITH IMAGE DATA [PDF]

A common objective in image analysis is dimensionality reduction. The most common often used data-exploratory technique with this objective is principal component analysis. We propose a new method based on the projection of the images as matrices after a
Daniel Peña, Mónica Benito
core  

Non‐Rigid 3D Shape Correspondences: From Foundations to Open Challenges and Opportunities

Computer Graphics Forum, EarlyView.
Abstract Estimating correspondences between deformed shape instances is a long‐standing problem in computer graphics; numerous applications, from texture transfer to statistical modelling, rely on recovering an accurate correspondence map. Many methods have thus been proposed to tackle this challenging problem from varying perspectives, depending on ...
A. Zhuravlev, L. Bastian, D. Cao, N. El Amrani, P. Roetzer, V. Ehm, R. Marin, H. Nishizawa, S. Morishima, C. Theobalt, N. Navab, D. Cremers, F. Bernard, Z. Lähner, V. Golyanik   +14 more
wiley   +1 more source