Results 51 to 60 of about 1,915,047 (283)

Geometric feature distributions for shape representation and recognition. [PDF]

, 1994
One of the fundamental problems in computer vision is the identification of objects from their shape. The research reported in this thesis is directed toward the development of a scheme for representing the shape of an object which allows it to be ...
Evans, Alun C
core   +5 more sources

Ontogenetic and interspecific variation in skull morphology of two closely related species of toad, Bufo bufo and B. spinosus (Anura: Bufonidae)

Acta Herpetologica, 2019
Using micro-CT and 3D landmark-based geometric morphometrics, I investigated postmetamorphic shape variation in the skull of Bufo bufo and Bufo spinosus, two widespread European toad species with small phenotypic differences.
Giovanni Sanna
doaj   +1 more source

Quantifying Levallois: a 3D geometric morphometric approach to Nubian technology

Archaeological and Anthropological Sciences
Levallois technology, a hallmark of Middle Palaeolithic stone tool manufacture, involves sophisticated core reduction strategies that have major implications for understanding human cognitive and technological evolution. However, traditional methods of analysing Levallois cores often fail to capture the nuanced variability in their morphology.
Hallinan, Emily, Cascalheira, João
openaire   +2 more sources

Longitudinal Morphomolecular Monitoring of Head and Neck Carcinogenesis

Advanced Science, EarlyView.
A miniaturized endoscopic probe that integrates Raman spectroscopy and optical coherence tomography, enabling simultaneous molecular and structural imaging of living tissue, was developed. Applied longitudinally in a mouse model of head and neck cancer, the system tracks disease progression from precancerous lesions to invasive cancer.
Jianrong Qiu, Priyanka G. Bhosale, Vishal Kumar, Jeyrroy Gabriel, Shiyue Liu, Ciro Chiappini, Richard J. Cook, Mads S. Bergholt   +7 more
wiley   +1 more source

A pH‐Switchable Cerium Single‐Atom Enzyme for Peri‐Implantitis Therapy via JAK‐STAT Signaling Axis‐Mediated Macrophage Reprogramming

Advanced Science, EarlyView.
A pH‐switchable cerium single‐atom enzyme is developed for stage‐specific peri‐implantitis therapy. Acidic conditions trigger antibacterial peroxidase‐like activity, whereas neutral conditions activate an antioxidant superoxide dismutase ‐ and catalase ‐like enzymatic relay. This microenvironment‐adaptive catalytic strategy suppresses the IL‐6/JAK‐STAT
Xiaomin Xia, Haojie Wu, Xingyun Li, Lining Liu, Kaiqing Song, Jinpei Cui, Jie Liu, Jiaxuan Yin, Emtiaz Ahmed, Yusuke Yamauchi, Xue Li   +10 more
wiley   +1 more source

A Biofabricated Human Acinus‐on‐a‐Chip Unveils Mechanotransductive Drivers of Ventilator‐Induced Lung Injury via Decoupling Volutrauma and Barotrauma

Advanced Science, EarlyView.
This bioinspired acinus‐on‐a‐chip recapitulates VILI pathology, revealing that volutrauma drives P53/NF‐κB pathways while barotrauma triggers mitochondrial‐Wnt dysregulation. A fibrotic transitional cell cluster was identified. Pharmacological interventions targeting these pathways significantly ameliorated injury, establishing a mechanobiological ...
Heng Lu, Liansheng Liu, Zengyong Hu, Shuxian Fang, Ruohan Ren, Sidi Liu, Meng Zhao, Zhiting Luo, Ziyue Zhang, Wenlong Shao, Qian Liu   +10 more
wiley   +1 more source

Geometric reasoning via internet crowdsourcing [PDF]

, 2009
The ability to interpret and reason about shapes is a peculiarly human capability that has proven difficult to reproduce algorithmically. So despite the fact that geometric modeling technology has made significant advances in the representation, display ...
Yan, X.T., Sherlock, A., Jagadeesan, A. P., Wenzel, J., Regli, W., Corney, J.R., Torres-Sanchez, C., Lynn, A.   +7 more
core   +4 more sources

Adaptation of shell morphology to different tidal zones—insights into phenotypic plasticity of Littorina brevicula

Frontiers in Ecology and Evolution
IntroductionThe adaptability of intertidal gastropods to their environmental niches is a critical aspect of their survival. Littorina brevicula, a common intertidal snail, exhibits phenotypic plasticity in response to varying tidal conditions. This study
Siqi Lai, Ling Shi, Ling Shi, Yida Han, Ying Tian, Ying Tian, Zhenlin Hao   +6 more
doaj   +1 more source

Sequential Patterning of Photoresponsive Hydrogels Directs Crypt Fission and Reveals the Role of Epithelial Curvature on Fission Symmetry

Advanced Science, EarlyView.
Deterministic crypt fission is achieved in intestinal organoids using photopatternable hydrogels with spatiotemporal control. Daughter‐crypt symmetry is shown to depend on parent‐crypt geometry and epithelial curvature, while myosin‐dependent mechanosensing links tissue shape to regenerative outcomes.
Delaney L. McNally, Kaustav Bera, Nolan R. Petrich, Alex Khang, Marilyne Coulombe, David Castillo‐Azofeifa, Ophir D. Klein, Peter J. Dempsey, Kristi S. Anseth   +8 more
wiley   +1 more source

Phylogenetic structure of body shape in a diverse inland ichthyofauna

Scientific Reports, 2023
Body shape is a fundamental metric of animal diversity affecting critical behavioral and ecological dynamics and conservation status, yet previously available methods capture only a fraction of total body-shape variance. Here we use structure-from-motion
Kevin T. Torgersen, Bradley J. Bouton, Alyx R. Hebert, Noah J. Kleyla, Xavier Plasencia, Garrett L. Rolfe, Victor A. Tagliacollo, James S. Albert   +7 more
doaj   +1 more source