Results 71 to 80 of about 128,872 (280)
Causal geometries and third-order ordinary differential equations [PDF]
, 2009 We discuss contact invariant structures on the space of solutions of a third-order ordinary differential equation. Associated to any third-order differential equation modulo contact transformations, Chern introduced a degenerate conformal Lorentzian ...
Holland, Jonathan, Sparling, George
core
Green functions and conformal geometry
Journal of Differential Geometry, 1999 A canonical metric, which is unique in its conformal class is constructed here with the Green function of the Yamabe operator (conformal Laplacian) and used for investigating the moduli space of locally conformally flat structures. This construction depends on the positive mass theorem of Schoen-Yau and the resulting metric is different from those ...
Habermann, Lutz, Jost, Jürgen
openaire +2 more sources
Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials
Advanced Engineering Materials, EarlyView.Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh +6 more
wiley +1 more source
Advanced Functional Materials, EarlyView.A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer +12 more
wiley +1 more source
AdS gravastar and bulk-cone singularities
Journal of High Energy PhysicsThe horizon of black hole is surrounded by the photon sphere and an outside observer cannot easily examine the geometry inside the photon sphere. In this note, we propose a way to investigate the region from dual conformal field theory by making use of ...
Heng-Yu Chen +2 more
doaj +1 more source
Geometrothermodynamics as a singular conformal thermodynamic geometry
Physics Letters B, 2019 In this letter, we first redefine our formalism of the thermodynamic geometry introduced in [1,2] by changing coordinates of the thermodynamic space by means of Jacobian matrices.
Seyed Ali Hosseini Mansoori +1 more
doaj +1 more source
Photoswitchable Conductive Metal–Organic Frameworks
Advanced Functional Materials, EarlyView.A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu +5 more
wiley +1 more source
Special Types of Locally Conformal Closed G2-Structures
Axioms, 2018 Motivated by known results in locally conformal symplectic geometry, we study different classes of G 2 -structures defined by a locally conformal closed 3-form.
Giovanni Bazzoni, Alberto Raffero
doaj +1 more source
Breaking away from the near horizon of extreme Kerr
SciPost Physics, 2020 We study gravitational perturbations around the near horizon geometry of the (near) extreme Kerr black hole. By considering a consistent truncation for the metric fluctuations, we obtain a solution to the linearized Einstein equations. The dynamics is
Alejandra Castro, Victor Godet
doaj +1 more source