Results 51 to 60 of about 37,514 (226)

Real area of contact and tractions on the patterned surfaces generated by spinodal decomposition and amplified instability

Frontiers in Mechanical Engineering, 2023
Past decades featured significant advancements in additive and micromanufacturing that facilitated the creation of functional patterned surfaces with impressive spatial resolutions.
Wonhyeok Lee, Melih Eriten
doaj   +1 more source

Complex Kerr Geometry, Twistors and the Dirac Electron

, 2008
The Kerr-Newman spinning particle displays some remarkable relations to the Dirac electron and has a reach spinor structure which is based on a twistorial description of the Kerr congruence determined by the Kerr theorem. We consider the relation between
A Burinskii, Akhiezer A I, Berestetsky V B, Burinskii A, Burinskii A, Burinskii A, Burinskii A, Burinskii A, Burinskii A, Burinskii A Elizalde E Hildebrandt S R Magli G, Burinskii A Kerr R P, Burinskii A Ya, Burinskii A Ya, Burinskii A Ya, Burinskii A Ya, Feynman R P, Gelfand I M, Ivanenko D, Ivanenko D, Kramer D, Rosquist K   +20 more
core   +1 more source

Géométrie Orthogonale Non Symétrique et Congruences Quadratiques (Nonsymmetric Orthogonal Geometry and Quadratic Congruences) [PDF]

Geometriae Dedicata, 2001
This paper is devoted to the study of quadratic congruences, which appear in the theory of exceptional bundles on projective spaces. A quadratic congruence associates to each point P of a projective space ℙ a quadratic in ℙ containing P. We study several geometric constructions of quadratic congruences and try to classify them.
openaire   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Timelike line congruences via surface theory in Minkowski 3-space

AIP Advances
Line congruences are crucial in classical geometry, particularly in relating one surface to another through families of lines. These correspondences are most valuable when they preserve key geometric features of the original surface.
Areej A. Almoneef, Rashad A. Abdel-baky
doaj   +1 more source

Geometric discretization of the Koenigs nets

, 2002
We introduce the Koenigs lattice, which is a new integrable reduction of the quadrilateral lattice (discrete conjugate net) and provides natural integrable discrete analogue of the Koenigs net. We construct the Darboux-type transformations of the Koenigs
Adam Doliwa, Belinski V. A., Cenkl B., Doliwa A., Doliwa A., Doliwa A., Doliwa A., Doliwa A., Doliwa A., Doliwa A., Doliwa A., Doliwa A., Eisenhart L. P., Koenigs G., Konopelchenko B. G., Levi D., Mañas M., Nieszporski M., Nimmo J. J. C., Schief W. K., Tzitzéica G.   +20 more
core   +1 more source

Kerr Spinning Particle, Strings, and Superparticle Models [PDF]

, 1998
A combined model of the Kerr spinning particle and superparticle is considered. The structure of the Kerr geometry is presented in a complex form as being created by a complex source.
A. Burinskii, A. Burinskii, A. Burinskii, A. Burinskii, A. Burinskii, A. Dabholkar, A. Pashnev, A. Sen, A. Sen, A. Sen, B. Carter, C. A. Lòpez, C. Holzhey, D. Ivanenko, D. P. Sorokin, D. V. Volkov, E. T. Newman, E. T. Newman, E. Witten, F. A. Berezin, G. C. Debney, G. Hoft, G. T. Horowitz, H. Nishino, I. Brink, J. Wess, P. C. Aichelburg, P. E. Appel, P. K. Townsend, R. Casalbuoni, R. W. Lind, S. Deser, V. Tugai, W. Israel   +33 more
core   +2 more sources

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Geroch group for Einstein spaces and holographic integrability [PDF]

, 2015
We review how Geroch's reduction method is extended from Ricci-flat to Einstein spacetimes. The Ehlers-Geroch SL(2,R) group is still present in the three-dimensional sigma-model that captures the dynamics, but only a subgroup of it is solution-generating.
Petkou, Anastasios C., Petropoulos, P. Marios, Siampos, Konstantinos   +2 more
core   +2 more sources

Mechanical Properties of Architected Polymer Lattice Materials: A Comparative Study of Additive Manufacturing and CAD Using FEM and µ‐CT

Advanced Functional Materials, EarlyView.
This study examines how pore shape and manufacturing‐induced deviations affect the mechanical properties of 3D‐printed lattice materials with constant porosity. Combining µ‐CT analysis, FEM, and compression testing, the authors show that structural imperfections reduce stiffness and strength, while bulk material inhomogeneities probably enhance ...
Oliver Walker, Thierry Roland, Damien Favier, Antoine Egele, Michael Heymann, Cosima Stubenrauch   +5 more
wiley   +1 more source