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Akademický článek

Three-dimensional polygonal muscle modelling and line of action estimation in living and extinct taxa

Autor: Oliver E. Demuth, Ashleigh L. A. Wiseman, Julia van Beesel, Heinrich Mallison, John R. Hutchinson

Publikováno v: Scientific Reports, Vol 12, Iss 1, Pp 1-16 (2022)

Abstract Biomechanical models and simulations of musculoskeletal function rely on accurate muscle parameters, such as muscle masses and lines of action, to estimate force production potential and moment arms. These parameters are often obtained throu

Externí odkaz: https://doaj.org/article/d1da1ff135294562a6b6c09fc62e54e9

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Akademický článek

Quantitative biomechanical assessment of locomotor capabilities of the stem archosaur Euparkeria capensis

Autor: Oliver E. Demuth, Ashleigh L. A. Wiseman, John R. Hutchinson

Publikováno v: Royal Society Open Science, Vol 10, Iss 1 (2023)

Birds and crocodylians are the only remaining members of Archosauria (ruling reptiles) and they exhibit major differences in posture and gait, which are polar opposites in terms of locomotor strategies. Their broader lineages (Avemetatarsalia and Pse

Externí odkaz: https://doaj.org/article/043ea9c49919408d89fe6cb01dbc922a

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Akademický článek

Topology-Based Three-Dimensional Reconstruction of Delicate Skeletal Fossil Remains and the Quantification of Their Taphonomic Deformation

Autor: Oliver E. Demuth, Juan Benito, Emanuel Tschopp, Stephan Lautenschlager, Heinrich Mallison, Niklaus Heeb, Daniel J. Field

Publikováno v: Frontiers in Ecology and Evolution, Vol 10 (2022)

Taphonomic and diagenetic processes inevitably distort the original skeletal morphology of fossil vertebrate remains. Key aspects of palaeobiological datasets may be directly impacted by such morphological deformation, such as taxonomic diagnoses and

Externí odkaz: https://doaj.org/article/4ccdf31445a84d7e8081a28acd1cf82b

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Akademický článek

Modeling Sprawling Locomotion of the Stem Amniote Orobates: An Examination of Hindlimb Muscle Strains and Validation Using Extant Caiman

Autor: Michelle Zwafing, Stephan Lautenschlager, Oliver E. Demuth, John A. Nyakatura

Publikováno v: Frontiers in Ecology and Evolution, Vol 9 (2021)

The stem amniote Orobates pabsti has been reconstructed to be capable of relatively erect, balanced, and mechanically power-saving terrestrial locomotion. This suggested that the evolution of such advanced locomotor capabilities preceded the origin o

Externí odkaz: https://doaj.org/article/e1556032262f4bbe83a059cebaafbb0b

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Akademický článek

The Tail of the Late Jurassic Sauropod Giraffatitan brancai: Digital Reconstruction of Its Epaxial and Hypaxial Musculature, and Implications for Tail Biomechanics

Autor: Verónica Díez Díaz, Oliver E. Demuth, Daniela Schwarz, Heinrich Mallison

Publikováno v: Frontiers in Earth Science, Vol 8 (2020)

Dinosaur locomotion and biomechanics, especially of their pelvic girdles and hindlimbs, have been analyzed in numerous studies. However, detailed volumetric musculoskeletal models of their tails are rarely developed. Here, we present the first detail

Externí odkaz: https://doaj.org/article/b52bf0d1473841daa428f78aaec19691

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Reconstructing Articular Cartilage in the Australopithecus afarensis Hip Joint and the Need for Modeling Six Degrees of Freedom

Autor: Ashleigh L A Wiseman, Oliver E Demuth, Emma Pomeroy, Isabelle De Groote

Publikováno v: INTEGRATIVE ORGANISMAL BIOLOGY

The postcranial skeleton of Australopithecus afarensis (AL 288-1) exhibits clear adaptations for bipedality, although there is some debate as to the efficiency and frequency of such upright movement. Some researchers argue that AL 288-1 walked with a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59fee97f5bb4f207aa0c9e6831a3de09

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A re-evaluation of diffraction from Si(111) 7 × 7: decoding the encoded phase information in the 7 × 7 diffraction pattern

Autor: J. E. Demuth

Publikováno v: Physical Chemistry Chemical Physics. 23:8043-8074

The diffraction features of Si(111) 7 × 7 are analyzed and related to various structural models of the Si(111) 7 × 7 surface as one part of a multivariate analysis of this system. The limitations in early sample preparation and measurements produce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfe70ca87135c18ca9ad09fd1f1931bb
https://doi.org/10.1039/d0cp05431c

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Experimental Evidence for a New Two-Dimensional Honeycomb Phase of Silicon: A Missing Link in the Chemistry and Physics of Silicon Surfaces?

Autor: J. E. Demuth

Publikováno v: The Journal of Physical Chemistry C. 124:22435-22446

A new two-dimensional (2D) phase of Si on Si111 is discussed that consists of ordered adatoms atop a honeycomb framework that contains ordered antiphase boundaries and periodic multi-atom vacancies...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c9136fd3c874978a5e215abecd0a06e
https://doi.org/10.1021/acs.jpcc.0c04860

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Walking—and Running and Jumping—with Dinosaurs and Their Cousins, Viewed Through the Lens of Evolutionary Biomechanics

Autor: A R Cuff, O E Demuth, K Michel, A Otero, R Pintore, D T Polet, A L A Wiseman, J R Hutchinson

Publikováno v: Integrative and Comparative Biology (ICB)

Archosauria diversified throughout the Triassic Period before experiencing two mass extinctions near its end ∼201 Mya, leaving only the crocodile-lineage (Crocodylomorpha) and bird-lineage (Dinosauria) as survivors; along with the pterosaurian flyi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c97b05a437d39e590126b9a698b7d24

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