Results 11 to 20 of about 54,387 (315)

Cell Shape and Surface Colonisation in the Diatom Genus Cocconeis—An Opportunity to Explore Bio-Inspired Shape Packing?

open access: yesBiomimetics, 2019
Optimal packing of 2 and 3-D shapes in confined spaces has long been of practical and theoretical interest, particularly as it has been discovered that rotatable ellipses (or ellipsoids in the 3-D case) can, for example, have higher packing densities ...
Timothy Sullivan
doaj   +1 more source

An Improved Method for Estimating Renal Dimensions; Implications for Management of Kidney Disease

open access: yesApplied Sciences, 2019
Changes in renal dimensions, including total kidney volume, not only inform ongoing renal disease but also disease progression. Determination of renal dimensions can inform drug efficacy, is important for matching recipients with potential donors, and to
Kristen Chao   +6 more
doaj   +1 more source

El discutido influjo de la Historia Roderici en el Cantar de mio Cid

open access: yesE-Spania, 2013
L’hypothèse d’un rapport entre le Cantar de mio Cid et l’Historia Roderici a soulevé, comme on sait, une querelle vive et encore irrésolue. Cette étude se propose de revisiter la question en soumettant à un nouvel examen deux passages de la biographie ...
Salvatore Luongo
doaj   +1 more source

A short history of the form of octagonal and elliptical city squares

open access: yesTechnical Transactions, 2021
The article starts with the short discussion of two geometrical figures, i.e., octagon and ellipse, their genesis in architecture and urban design, and the examples of buildings whose plans were based upon them.
Motak Maciej, Woźniczka Magdalena
doaj   +1 more source

Comparison of Seed Images with Geometric Models, an Approach to the Morphology of Silene (Caryophyllaceae)

open access: yesTaxonomy, 2023
Seed morphological description is traditionally based on adjectives, which originated from the comparison with other shapes, including geometric figures.
José Javier Martín-Gómez   +4 more
doaj   +1 more source

The perimeter of a flattened ellipse can be estimated accurately even from Maclaurin’s series

open access: yesCubo, 2019
For the perimeter $P(a,b)$ of an ellipse with the semi-axes $a\ge b\ge 0$ a sequence $Q_n(a,b)$ is constructed such that the relative error of the approximation $ P(a,b)\approx Q_n(a,b)$ satisfies the following inequalities \begin{align*} 0\le -\frac{
Vito Lampret
doaj   +1 more source

Temperature, ph indicator and the anomalies of the natural radioactive element ratios of metasomatites in Priamurye

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2020
Based on the airborne geophysical data, the anomalies of the natural radioactive element (NRE) ratio values above a background level are determined for different types of metasomatites in Priamurye.
Володькова Т.В.
doaj   +1 more source

Cardiovagal Baroreflex Hysteresis Using Ellipses in Response to Postural Changes

open access: yesFrontiers in Neuroscience, 2021
The cardiovagal branch of the baroreflex is of high clinical relevance when detecting disturbances of the autonomic nervous system. The hysteresis of the baroreflex is assessed using provoked and spontaneous changes in blood pressure.
Babak Dabiri   +2 more
doaj   +1 more source

Product labeling accuracy and contamination analysis of commercially available cannabidiol product samples

open access: yesFrontiers in Pharmacology
Background and objective: Commercially available cannabidiol (CBD) products are increasingly being used for medicinal purposes, including for the treatment of various neurological conditions, but there are growing concerns around adherence to quality ...
Barry E. Gidal   +6 more
doaj   +1 more source

Bayesian Regression Analysis for Dependent Data with an Elliptical Shape

open access: yesEntropy
This paper proposes a parametric hierarchical model for functional data with an elliptical shape, using a Gaussian process prior to capturing the data dependencies that reflect systematic errors while modeling the underlying curved shape through a von ...
Yian Yu   +5 more
doaj   +1 more source

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