Results 21 to 30 of about 3,181 (225)

New type surfaces in terms of B-Smarandache Curves in Sol3

open access: yesActa Scientiarum: Technology, 2015
In this work, new type ruled surfaces in terms of B- Smarandache TM1 curves of biharmonic B- slant helices in the SOL3 are studied. We characterize the B- Smarandache TM1 curves in terms of their Bishop curvatures.
Talat Körpınar
doaj   +1 more source

Isophote curves on timelike surfaces in Minkowski 3-space

open access: yes, 2012
Isophote comprises a locus of the surface points whose normal vectors make a constant angle with a fixed vector. In this paper, isophote curves are studied on timelike surfaces in Minkowski 3-space E31.
Ali   +25 more
core   +1 more source

Spacelike B2-Slant Helix in Minkowski 4-Space

open access: yes, 2010
8 ...
Önder, Mehmet   +2 more
openaire   +2 more sources

Curves According to the Successor Frame in Euclidean 3-Space

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018
In thepresent study, the successor formulae of the successor curves defined byMenninger [1] are given. Then, by defining the successor planes, the geometricmeanings of the successor curvatures are investigated and the relations acrossthe components of ...
Melek Masal
doaj   +1 more source

A note about the torsion of null curves in the $3$-dimensional Minkowski spacetime and the Schwarzian derivative

open access: yes, 2015
The main topic of this paper is to show that in the 3-dimensional Minkowski spacetime, the torsion of a null curve is equal to the Schwarzian derivative of a certain function appearing in a description of the curve.
Olszak, Zbigniew
core   +1 more source

Space curves defined by curvature–torsion relations and associated helices [PDF]

open access: yes, 2019
The relationships between certain families of special curves, including the general helices, slant helices, rectifying curves, Salkowski curves, spherical curves, and centrodes, are analyzed. First, characterizations of proper slant helices and Salkowski
Alghanemi, A, Deshmukh, S, Farouki, RT
core  

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

open access: yesFEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva   +10 more
wiley   +1 more source

New Associated Curves k-Principle Direction Curves and N_k Slant Helix

open access: yes, 2014
The Frenet frame is generally known an orthonormal vector frame for curves. But, it does not always meet the needs of curve characterizations. In this study, with the help of associated curves of any spatial curve we obtained a new orthonormal frame which has the property that the second vector makes a constant angle with a fixed direction for the ...
RAMİS, Çağla   +2 more
openaire   +3 more sources

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

Slant Helices and Darboux Helices in Myller Configuration

open access: yesAxioms
In this paper, we study slant helices (or ξ_2-helices) and Darboux helices in the Myller configuration M. We demonstrate that a curve in M is a slant helix if and only if it is a Darboux helix.
Yanlin Li   +3 more
doaj   +1 more source

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