Results 51 to 60 of about 82,883 (302)

Some aspects of topology and kinematics of a 3DOF translational parallel mechanism

open access: yesInternational Journal of Applied Mechanics and Engineering, 2014
The paper presents elements of the topology, geometry and the kinematic analysis of a translational parallel mechanism with three degrees of freedom.
J. Bałchanowski
doaj   +1 more source

Application of hyperbolic geometry in link prediction of multiplex networks [PDF]

open access: yesScientific Reports, 2019
AbstractRecently multilayer networks are introduced to model real systems. In these models the individuals make connection in multiple layers. Transportation networks, biological systems and social networks are some examples of multilayer networks.
Samei, Zeynab, Jalili, Mahdi
openaire   +2 more sources

Birational Geometry of 3-fold Mori Fibre Spaces [PDF]

open access: yes, 2004
We study the geography and birational geometry of 3-fold conic bundles over P\(^2\) and cubic del Pezzo fibrations over P\(^1\).
Brown, G., Corti, A., Zucconi, F.
core  

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

open access: yesFEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure   +3 more
wiley   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

open access: yesFEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

THE ROLE OF PROJECTIVE GEOMETRY IN TALIAN EDUCATION AND INSTITUTIONS AT THE END OF THE 19TH CENTURY

open access: yesRevista de História da Educação Matemática, 2023
At the end of the 19th century, projective geometry was at the basis of most geometric research in Italy, and of much other research work in Europe. Furthermore, through its close connection with descriptive geometry, it seemed particularly responsive to
Marta Menghini
doaj  

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

open access: yesFEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson   +6 more
wiley   +1 more source

Bis(tribenzylammonium) tetrachloridoaurate(III) chloride

open access: yesActa Crystallographica Section E, 2010
In the title compound, (C21H22N)2[AuCl4]Cl, the AuIII atom adopts a square-planar coordination geometry defined by four chloride ions. In the crystal structure, intermolecular N—H...Cl hydrogen bonds link the organic cations and the ...
Yousef Fazaeli   +3 more
doaj   +1 more source

Factorization in Phase-Space Finite Geometry and Weak Mutually Unbiased Bases

open access: yesAfrican Scientific Reports, 2023
A phase-space factorization of lines in finite geometry G(m) with variables in Zm and its correspondence in finite Hilbert space H(m) for m a non-prime was discussed. Using the method of Good [15], lines in G(m) were factorized as products of lines G(mi)
A. D. Adeshola   +3 more
doaj   +1 more source

Helicity, linking, and writhe in a spherical geometry

open access: yesJournal of Physics: Conference Series, 2014
Linking numbers, helicity integrals, twist, and writhe all describe the topology and geometry of curves and vector fields. The topology of the space the curves and fields live in, however, can affect the behaviour of these quantities. Here we examine curves and fields living in regions exterior to a sphere or in spherical shells.
Campbell, Jack, Berger, M.A.
openaire   +2 more sources

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