Results 61 to 70 of about 4,821 (295)

Local Generalized Symmetries and Locally Symmetric Parabolic Geometries

, 2017
We investigate (local) automorphisms of parabolic geometries that generalize geodesic symmetries. We show that many types of parabolic geometries admit at most one generalized geodesic symmetry at a point with non-zero harmonic curvature.
Zalabová, L., Gregorovič, J.
core   +1 more source

An ALE ESFEM for solving PDEs on evolving surfaces [PDF]

, 2012
Numerical methods for approximating the solution of partial differential equations on evolving hypersurfaces using surface finite elements on evolving triangulated surfaces are presented.
Vanessa Styles (4460662), Styles, Vanessa, Charles Martin Elliott (16042838), Elliott, Charles M.   +3 more
core   +1 more source

Kelvin Probe Force Microscopy in Bionanotechnology: Current Advances and Future Perspectives

Advanced Materials, EarlyView.
Kelvin probe force microscopy (KPFM) enables the nanoscale mapping of electrostatic surface potentials. While widely applied in materials science, its use in biological systems remains emerging. This review presents recent advances in KPFM applied to biological samples and provides a critical perspective on current limitations and future directions for
Ehsan Rahimi, Mario Palacios‐Corella, Arjan Mol, Salvador Pané, Josep Puigmartí‐Luis   +4 more
wiley   +1 more source

Numerical investigation of thermal-electrical performance in solar modules using hybrid, parabolic, and flat-plate reflectors

Energy Exploration & Exploitation
Maximizing solar module output is critical for installations with limited available area. This study investigates the effects of integrating flat-plate, parabolic, and hybrid reflector designs with photovoltaic (PV) modules to enhance energy generation ...
Suleiman Ibrahim Mohammad, Thanaa amir ahmed, Asokan Vasudevan, Ibrahim alkhrsan, Ramachandran T, Aditya Kashyap, Karthikeyan A, Dhirendra Nath Thatoi, Ali Shamel   +8 more
doaj   +1 more source

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source

Optimizing drilling parameters for fly ash-filled hemp/epoxy composites: investigating drill bit geometries, feed rates, and spindle speeds

Materials Research Express
This article investigates the drilling behavior of hemp fiber-reinforced epoxy composites, both unfilled and fly ash-filled. Drilling performance tests were conducted at varying feed rates (8, 16, and 24 mm min ^−1 ) and spindle speeds (700, 1400, and ...
Mridusmita Roy Choudhury, Hrishikesh Dutta, M Shanmuka Srinivas, Kishore Debnath, T Arunkumar, Vikas Upadhyay   +5 more
doaj   +1 more source

Treatment of Wastewater, Phenols and Dyes Using Novel Magnetic Torus Microreactors and Laccase Immobilized on Magnetite Nanoparticles

Nanomaterials, 2022
In this work, the design, manufacture, and testing of three different magnetic microreactors based on torus geometries (i.e., one-loop, two-horizontal-loop, and two-vertical-loop) is explored to increase the enzyme-based transformation of dyes by laccase
Paula Andrea Peñaranda, Mabel Juliana Noguera, Sergio Leonardo Florez, Johana Husserl, Nancy Ornelas-Soto, Juan C. Cruz, Johann F. Osma   +6 more
doaj   +1 more source

Generalized Dolbeault Sequences in Parabolic Geometry

Journal of Lie Theory, 2008
In this paper, we show the existence of a sequence of invariant differential operators on a particular homogeneous model $G/P$ of a Cartan geometry. The first operator in this sequence can be locally identified with the Dirac operator in $k$ Clifford variables, $D=(D_1,..., D_k)$, where $D_i=\sum_j e_j\cdot \partial_{ij}: C^\infty((\R^n)^k,§)\to C ...
openaire   +3 more sources

Directional Flow of Confined Polaritons in CrSBr

Advanced Materials, EarlyView.
CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak, Sichao Yu, Jaime Abad‐Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zdeněk Sofer, Antonio I. Fernández‐Domínguez, Francisco J. Garcia‐Vidal, Vinod M. Menon   +10 more
wiley   +1 more source

The effects of heat exchange and fluid production on the ignition of a porous solid

, 2008
In this paper we study a system of nonlinear parabolic equations representing the evolution of small perturbations in a modeldescribing the combustion of a porous solid.
McIntosh, A.C., Brindley, J., Shah, Akeel A., McIntosh, A. C., Rademacher, Jens, Rademacher, J.D.M. (Jens), Shah, A.A., McIntosh, A., Rademacher, J.   +8 more
core   +1 more source