Results 61 to 70 of about 4,510 (201)

Helices in the Euclidean 5-Space [PDF]

open access: yesarXiv, 2014
In this study, we have identified $V_3$ slant helix ($2^{nd}$ type slant helix, $V_5$ slant helix ($3^{rd}$ type slant helix) and attained some characteristic properties in the Euclidean 5-Space $E^5$. In addition to this, we have proven that there are no other helices other than $V_1$ helix (inclined curve), $V_3$ slant helix and $V_5$ slant helix in ...
arxiv  

Helices associated to helical curves, relatively normal-slant helices and isophote curves [PDF]

open access: yesarXiv, 2022
This study introduces a new type of general helix called associated helix which is associated to a special surface curve. The basic idea is to determinate the parametric form of an associated helix by means of Darboux frame and surface curvatures of a special surface curve such as helical curve, relatively normal-slant helix or isophote curve. For each
arxiv  

Morphology of the unique egg cases of hornsharks (Heterodontiformes: Heterodontidae)

open access: yesJournal of Fish Biology, Volume 106, Issue 2, Page 389-402, February 2025.
Abstract Many of the egg cases of oviparous chondrichthyans remain unknown and undescribed in the literature. Egg cases can be a useful taxonomic character for species distinction and can be a valuable indicator of a species distribution in the field.
Helen L. O'Neill   +2 more
wiley   +1 more source

On f-Eikonal Helices And f-Eikonal Slant Helices In Riemannian Manifolds [PDF]

open access: yesarXiv, 2012
In this paper, we define f-eikonal helix curves and f-eikonal V_{n}-slant helix curves in a n-dimensional Riemannian manifold. Also, we give the definition of harmonic curvature functions related to f-eikonal helix curves and f-eikonal V_{n}-slant helix curves in a n-dimensional Riemannian manifold.
arxiv  

Eikonal Slant Helices and Eikonal Darboux Helices In 3-Dimensional Riemannian Manifolds [PDF]

open access: yes, 2013
In this study, we give definitions and characterizations of eikonal slant helix curves, eikonal Darboux helices and non-normed eikonal Darboux helices in three dimensional Riemannian manifold 3 M . We show that every eikonal slant helix is also an eikonal Darboux helix.
arxiv   +1 more source

Eocene gastropods of the New Forest, UK

open access: yesGeology Today, Volume 41, Issue 1, Page 26-37, January/February 2025.
Gastropods expanded into niches vacated by both terrestrial and marine organisms following the end‐Cretaceous mass extinction, to become one of the dominant mollusc groups of the Cenozoic. The Selsey Formation of Eocene age was deposited within a shallow marine embayment across the Hampshire Basin (southern England) and contains a particularly diverse ...
James Barnet
wiley   +1 more source

Genotoxikus hatásra bekövetkező funkcionális és strukturális DNS változások = Functional and structural changes in DNA upon genotoxic effects [PDF]

open access: yes, 2008
Morfológiai és biokémiai vizsgálataink arra utalnak, hogy a a genotoxikus hatások kategorizálhatók az okozott kromatin változások alapján. A kemotoxikus változások potenciális diagnosztikus jelentősége miatt vizsgáltuk a nehézfémek (elsősosrban kadmium) (
B. Kiss, Zsigmond   +6 more
core  

Null eikonal helices and Null eikonal slant helices in the 4-dimensional Lorentzian manifold [PDF]

open access: yesarXiv, 2014
In this paper, we define the notion of eikonal helix and eikonal slant helix for null curves in the 4-dimensional Lorentzian manifold M 1 4 and give a characterization for the null curve to be the null eikonal helix. Moreover, we indicate an important relation between the null eikonal helix and null eikonal slant helix and find the axis of the null ...
arxiv  

Detailed Early Life History of the Giant Muricid Snail Chicoreus ramosus in the Southern China Sea

open access: yesAquaculture Research, Volume 2025, Issue 1, 2025.
Tropical marine life is highly diverse, but the development and utilization of many species remain insufficient. The giant muricid snail Chicoreus ramosus, notable for its large size and high‐quality meat, holds significant potential for aquaculture. Previous descriptions of its seedling production were incomplete and sometimes inaccurate.
Gan Wang   +10 more
wiley   +1 more source

First characterisation of the populations and immune-related activities of hemocytes from two edible gastropod species, the disk abalone, Haliotis discus discus and the spiny top shell, Turbo cornutus. [PDF]

open access: yes, 2010
International audienceThe disk abalone Haliotis discus discus and the spiny top shell Turbo cornutus are edible gastropod species of high economic value, mainly in Asia.
Choi, Kwang-Sik   +5 more
core   +2 more sources

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