Results 101 to 110 of about 29,707 (308)

Improved Riccati Transfer Matrix Method for Free Vibration of Non-Cylindrical Helical Springs Including Warping

Shock and Vibration, 2012
Free vibration equations for non-cylindrical (conical, barrel, and hyperboloidal types) helical springs with noncircular cross-sections, which consist of 14 first-order ordinary differential equations with variable coefficients, are theoretically derived
A.M. Yu, Y. Hao
doaj   +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

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Electromagnetic retroreflection augmented by spherical and conical metasurfaces

, 2017
The focus of this paper is on phase gradient metasurfaces conformal to spherical and conical bodies of revolution, with an aim of engineering retroreflections and therefore augmenting backscattering cross-sections of those three-dimensional geometries ...
Shang, Yuping, Yuping Shang, Shen, Zhongxiang, Zhongxiang Shen   +3 more
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Lightweight conical components for rotational parabolic domes: geometric definition, structural behaviour, optimisation and digital fabrication [PDF]

, 2016
Although initially intended for academic purposes, the research shown in this paper was drawn towards the development of hollow lightweight conical com-ponents to materialise rotational parabolic domes.
Adriaenssens, S. (Coordinador), Narváez Rodríguez, Roberto, Gramazio, F. (Coordinador), Kohler, M. (Coordinador), Menges, A. (Coordinador), Barrera Vera, José Antonio, Pauly, M. (Coordinador)   +6 more
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Fraxicon for Optical Applications with Aperture ∼1 mm: Characterisation Study

Nanomaterials
Emerging applications of optical technologies are driving the development of miniaturised light sources, which in turn require the fabrication of matching micro-optical elements with sub-1 mm cross-sections and high optical quality.
Haoran Mu, Daniel Smith, Soon Hock Ng, Vijayakumar Anand, Nguyen Hoai An Le, Raghu Dharmavarapu, Zahra Khajehsaeidimahabadi, Rachael T. Richardson, Patrick Ruther, Paul R. Stoddart, Henrikas Gricius, Tomas Baravykas, Darius Gailevičius, Gediminas Seniutinas, Tomas Katkus, Saulius Juodkazis   +15 more
doaj   +1 more source

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

CURVAS PARALELAS EXPLÍCITAS DE LAS CURVAS CÓNICAS NO DEGENERADAS PARA EL TORNEADO CNC DE LENTES Y ESPEJOS ASFÉRICO-CÓNICOS EXPLICIT PARALLEL CURVES OF NON-DEGENERATE CONIC CURVES FOR THE TURNED CNC OF ASPHERIC-CONIC LENSES AND MIRORS

Revista EIA, 2008
Este artículo presenta el método para obtener, en coordenadas cartesianas, las líneas curvas paralelas de las curvas cónicas no degeneradas, por métodos analíticos y numéricos.
Juan Camilo Valencia, Álvaro Hernán Bedoya   +1 more
doaj  

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

Advanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo, Masoud Mansouri, Carlos Garcia‐Fernandez, Daniel Sánchez‐Portal, Aran Garcia‐Lekue, Gustavo Ceballos, Aitor Mugarza   +6 more
wiley   +1 more source

Mardin (Turkey): sections of unidentified conical vaults

Box 21, Folder 09. Ink drawing. Mardin (Turkey). Drawing depicts sections of conical vaults in unidentified building. Title and identification based on original handwritten notes on front of drawing.
Herzfeld, Ernst, 1879-1948
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