Results 51 to 60 of about 779,272 (286)

An Intuitive Approach to Geometric Continuity for Parametric Curves and Surfaces (Extended Abstract) [PDF]

open access: yes, 1985
The notion of geometric continuity is extended to an arbitrary order for curves and surfaces, and an intuitive development of constraints equations is presented that are necessary for it. The constraints result from a direct application of the univariate
Barsky, B. A., Derose, T. D.
core   +1 more source

Geometric Morphometrics of Hominoid Infraspinous Fossa Shape [PDF]

open access: yesThe Anatomical Record, 2014
ABSTRACTRecent discoveries of early hominin scapulae from Ethiopia (Dikika, Woranso‐Mille) and South Africa (Malapa) have motivated new examinations of the relationship between scapular morphology and locomotor function. In particular, infraspinous fossa shape has been shown to significantly differ among hominoids.
Green, D.   +4 more
openaire   +3 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

open access: yesFEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee   +3 more
wiley   +1 more source

The Generalized H-Bézier Model: Geometric Continuity Conditions and Applications to Curve and Surface Modeling

open access: yesMathematics, 2020
The local controlled generalized H-Bézier model is one of the most useful tools for shape designs and geometric representations in computer-aided geometric design (CAGD), which is owed to its good geometric properties, e.g., symmetry and shape adjustable
Fenhong Li   +3 more
doaj   +1 more source

Geometric phase around exceptional points [PDF]

open access: yes, 2005
A wave function picks up, in addition to the dynamic phase, the geometric (Berry) phase when traversing adiabatically a closed cycle in parameter space.
A. Bohm   +8 more
core   +2 more sources

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Evaluating the geometric shape of a flying paraglider [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
This paper describes the photogrammetric approach to find the geometric shape of a paraglider. As its geometry is only available during the flight this had to be done under special conditions. The layout of the camera positions was limited by the strict
K. Hanke, S. Schenk
doaj   +1 more source

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

open access: yesFEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai   +9 more
wiley   +1 more source

Friction characteristics on sliding part between piston and cylinder of swash plate type piston pump (Effect of geometric shape of piston)

open access: yesNihon Kikai Gakkai ronbunshu, 2017
The friction characteristics on sliding part between piston and cylinder in a swash plate type piston pump in which improvement of the power density is demanded affect the equipment performance and the efficiency.
Kazuhiko TANAKA, Yusuke FUJITA
doaj   +1 more source

Bat Species Comparisons Based on External Morphology: A Test of Traditional versus Geometric Morphometric Approaches. [PDF]

open access: yesPLoS ONE, 2015
External morphology is commonly used to identify bats as well as to investigate flight and foraging behavior, typically relying on simple length and area measures or ratios. However, geometric morphometrics is increasingly used in the biological sciences
Daniela A Schmieder   +3 more
doaj   +1 more source

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