Results 71 to 80 of about 59,062 (321)

Kepler’s Laws and Conic Sections [PDF]

Arnold Mathematical Journal, 2015
The Kepler's law reads as second order ODE \(\ddot{\pmb{\text{r}}} = -k |\pmb{\text{r}}|^{-3} \pmb{\text{r}}\), where \(\pmb{\text{r}}=(x,y)\) is the position of a planet \(P\) in the \(Oxy\)-plane and \(k\) is a coefficient of proportionality in the Newton law \(F=ma\). The author lifts \(P\) on the cone \(r^2=x^2+y^2\) and represents the lifted point
openaire   +1 more source

LL‐37 Driven Phase Transition and Stacking in Oligolamellar Gram‐Negative Bacterial Membrane Models

Advanced Functional Materials, EarlyView.
This work establishes oligolamellar bacterial membrane models to investigate how LL‐37 disrupts the complex dual‐bilayer architecture of Gram‐negative bacteria. Combining SAXS, cryo‐TEM, electrophoretic mobility measurements, and coarse‐grained simulations, it reveals cardiolipin‐driven phase transitions leading to bicelle‐like structures and membrane ...
Bettina Tran, Diane C.A. Lima, Linda Sandblad, Madeleine Ramstedt, Thereza A. Soares, Stefan Salentinig   +5 more
wiley   +1 more source

Volume-Preserving Shear Transformation of an Elliptical Slant Cone to a Right Cone

Axioms
One nappe of a right circular cone, cut by a transverse plane, splits the cone into an infinite frustum and a cone with an elliptical section of finite volume. There is a standard way of computing this finite volume, which involves finding the parameters
Marco Frego, Cristian Consonni
doaj   +1 more source

High-speed multiview imaging approaching 4pi steradians using conic section mirrors: theoretical and practical considerations. [PDF]

J Opt Soc Am A Opt Image Sci Vis, 2021
Zhou KC, Dhalla AH, McNabb RP, Qian R, Farsiu S, Izatt JA.   +5 more
europepmc   +1 more source

Elucidating the Role of Surface Ligands on the Oxidative Etching of Au Bipyramids During Photothermia Using Liquid Cell Transmission Electron Microscopy

Advanced Functional Materials, EarlyView.
Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia, Valentina Girelli Consolaro, Sophie Marbach, Nancy Rahbany, Grégoire Petit, Ovidiu Ersen, Juan J. Giner‐Casares, Ali Abou‐Hassan   +7 more
wiley   +1 more source

CLASSIFICATION OF VIEWPOINT INDEPENDENT IMAGE GROUPS

Havacılık ve Uzay Teknolojileri Dergisi, 2013
Classification of image groups has different applications in remote sensing, photogrammetry, digital painting catalogues and security related areas. Researchers from remote sensing, computer vision and photogrammetry have used different approaches based ...
Mustafa Özendi, Alper Yılmaz
doaj  

Mathematical analysis of corneal remodelling after intracorneal ring surgery in keratoconus

International Journal of Ophthalmology, 2017
AIM: To represent mathematically the intersection between the ectatic corneal geometry and the plane of intracorneal ring implants (ICRS) in order to determine the corneal response to ICRS surgery in keratoconus (KC).
Elias F. Jarade, Elise Slim, Carole Cherfan, Hala El Rami, Toufic Hassan, Elias Chelala   +5 more
doaj   +1 more source

Multiplex Modular Nanorobotic Systems with Catalytic Activity under Magnetic Navigation

Advanced Functional Materials, EarlyView.
We present modular nanorobots composed of a magnetic propulsion module and different extension modules carrying functional activities, assembled via DNA base pairing. The system integrates propulsion, optical tracking, enzymatic catalysis, and cell docking in a programmable manner.
Voichita Mihali, Xinan Huang, Lucie Motyckova, Nicolas Moreno Gomez, Michal Skowicki, Cora‐Ann Schoenenberger, Peer Fischer, Cornelia G. Palivan   +7 more
wiley   +1 more source

Multi‐Responsive Dendrimer‐Hyaluronic Acid Hydrogel With Lubricating and Immunoregulatory Functions for Synergistic Osteoarthritis Therapy

Advanced Functional Materials, EarlyView.
A hydrogel with dynamic cross‐links was formed by cross‐linking hyaluronic acid with curcumin‐preloaded, phenylboronic acid‐modified poly(amidoamine) dendrimers. This hydrogel exhibited excellent injectability and self‐healing ability, enabling controlled Cur release in response to low pH, high reactive oxygen species (ROS) generation, or mechanical ...
Junjie Liu, Mengsi Zhan, Haoyu Huang, Jianhong Wang, Cheng Ni, Xiaojun Zhou, Hannah Küttner, Cong Song, Xiangyang Shi, Andrij Pich   +9 more
wiley   +1 more source

ASPECTS AND GEOMETRIC INTERPRETATION IN SOLVING CONICAL SECTIONS

Journal of Industrial Design and Engineering Graphics, 2019
In mathematics, a conic is the curve that is obtained by intersecting a plane with a cone. Is well known that the shape of this curve may differ quite a bit depending on the position of the intersection plane relative to the cone axis, as it is actually ...
Alina Duta, Ionut - Daniel Geonea, Gordana Djukanovic, Marcela Popescu, Ludmila Sass   +4 more
doaj   +4 more sources