Results 61 to 70 of about 1,024,610 (340)

Efficient and Scalable Radiative Cooling for Photovoltaics Using Solution‐Processable and Solar‐Transparent Mesoporous Nanoparticles

Advanced Functional Materials, EarlyView.
Graded refractive index (GRI) structures are prepared from the layer‐by‐layer spray coating of the mesoporous SiO2 nanoparticles, showing high solar transparency and thermal emissivity. Under outdoor conditions, after 50 days, the GRI‐coated photovoltaics show on average 6.65 ± 1.48 °C lower than that of the non‐coated references, maintaining 80.9 ± 8 ...
Heesuk Jung, Sung Yoon Min, Byungsoo Kang, Yongseok Yoo, Jihun Jang, Yeoun‐Woo Jang, Hyojeong Choi, Hyeong Won Lee, Swarup Biswas, Yongju Lee, Mansoo Choi, Phillip Lee, Min Seok Jang, Hyeok Kim, Shu Yang   +14 more
wiley   +1 more source

Multimessenger Probes of Supermassive Black Hole Spin Evolution

The Astrophysical Journal
Using the semianalytic model Serotina , we investigate the cosmic spin evolution of supermassive black holes (SMBHs) incorporating recent results from general-relativistic magnetohydrodynamics simulations of spin-down from relativistic jets.
Angelo Ricarte, Priyamvada Natarajan, Ramesh Narayan, Daniel C. M. Palumbo   +3 more
doaj   +1 more source

The correspondence between thermodynamic curvature and isoperimetric theorem from ultraspinning black hole

Physics Letters B, 2020
In this paper, a preliminary correspondence between the thermodynamic curvature and the isoperimetric theorem is established from a 4-dimensional ultraspinning black hole.
Zhen-Ming Xu
doaj   +1 more source

Static Axially Symmetric Einstein-Yang-Mills-Dilaton Solutions: II.Black Hole Solutions

, 1997
We discuss the new class of static axially symmetric black hole solutions obtained recently in Einstein-Yang-Mills and Einstein-Yang-Mills-dilaton theory. These black hole solutions are asymptotically flat and they possess a regular event horizon.
A. E. Mayo, B. Kleihaus, B. Kleihaus, B. Kleihaus, B. Kleihaus, B. Kleihaus, B. Kleihaus, B. Kleihaus, B. Kleihaus, B. Kleihaus, Burkhard Kleihaus, C. J. Houghton, C. J. Houghton, C. J. Houghton, C. Rebbi, D. C. Robinson, D. Garfinkle, D. Kramer, E. Braaten, E. E. Donets, G. Lavrelashvili, G. W. Gibbons, H. P. Künzle, J. A. Smoller, J. Kunz, Jutta Kunz, M. S. Volkov, M. S. Volkov, N. J. Hitchin, N. Straumann, N. Straumann, N. Straumann, O. Brodbeck, O. Brodbeck, P. Bizon, P. Bizon, P. Breitenlohner, P. Breitenlohner, P. Mazur, R. A. Battye, R. Bartnik, R. M. Wald, S. A. Ridgway, S. Weinberg, W. Israel, W. Schönauer, Y. Brihaye   +46 more
core   +1 more source

Liouville black holes [PDF]

Nuclear Physics B, 1994
The dynamics of Liouville fields coupled to gravity are investigated by applying the principle of general covariance to the Liouville action in the context of a particular form of two-dimensional dilaton gravity. The resultant field equations form a closed system for the Liouville/gravity interaction.
openaire   +3 more sources

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

Advanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu, Jochen Vanderspikken, Paola Mantegazza, Stefania Moro, Mouna Hamid, Sigurd Mertens, Niko Van den Brande, Laurence Lutsen, Vincent Lemaur, David Beljonne, Giovanni Costantini, Koen Vandewal, Bruno Van Mele, Wouter Maes, Bart Goderis   +14 more
wiley   +1 more source

Accessing a New Population of Supermassive Black Holes with Extensions to the Event Horizon Telescope

The Astrophysical Journal
The Event Horizon Telescope (EHT) has produced resolved images of the supermassive black holes (SMBHs) Sgr A* and M87*, which present the largest shadows on the sky.
Xinyue Alice Zhang, Angelo Ricarte, Dominic W. Pesce, Michael D. Johnson, Neil Nagar, Ramesh Narayan, Venkatessh Ramakrishnan, Sheperd Doeleman, Daniel C. M. Palumbo   +8 more
doaj   +1 more source

Hydrogel‐Based Photothermal‐Catalytic Membrane for Efficient Cogeneration of Freshwater and Hydrogen in Membrane Distillation System

Advanced Functional Materials, EarlyView.
This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun, Muhammad Usman Farid, Wenlong Xi, Gang Lu, Min Wei Boey, Sai Kishore Ravi, Patrick H.‐L. Sit, Alicia Kyoungjin An   +7 more
wiley   +1 more source

Jet Archaeology and Forecasting: Image Variability and Magnetic Field Configuration

The Astrophysical Journal
We investigate how magnetic field variations around accreting black holes (BHs) on event horizon scales affect the morphology of magnetically driven jets on larger scales.
Yuh Tsunetoe, Ramesh Narayan, Angelo Ricarte   +2 more
doaj   +1 more source

Shadow and quasinormal modes of the Kerr–Newman–Kiselev–Letelier black hole

European Physical Journal C: Particles and Fields, 2022
We investigate the null geodesics and the shadow cast by the Kerr–Newman–Kiselev–Letelier (KNKL) black hole for the equation of state parameter $$\omega _q=-2/3$$ ω q = - 2 / 3 and for different values of the spacetime parameters, including the ...
Farruh Atamurotov, Ibrar Hussain, G. Mustafa, Kimet Jusufi   +3 more
doaj   +1 more source