Results 81 to 90 of about 845,952 (352)

Material Composition Gradient Controls the Autonomous Opening of Banksia Seed Pods in Fire‐Prone Habitats

Advanced Functional Materials, EarlyView.
The seed pod valves of Australian Banksia attenuata plants are not simply bi‐layers which bend when dry. These experiments and models reveal complex mechanics, which allow seed release only after several steps of seed pod opening. Stiffness gradients prevent delamination of the valves during loading, and a shape‐memory function protects the seeds ...
Friedrich Reppe, Lorenzo Guiducci, Rivka Elbaum, Peter Werner, John W. C. Dunlop, David J. Merritt, Peter Fratzl, Michaela Eder   +7 more
wiley   +1 more source

Strange Exotic States and Compact Stars [PDF]

, 2006
We discuss the possible appearance of strange exotic multi-quark states in the interior of neutron stars and signals for the existence of strange quark matter in the core of compact stars.
Alford M Blaschke D Drago A Klähn T Pagliara G Schaffner-Bielich J, Berdermann J Blaschke D Grigorian H Voskresensky D N, Bombaci I, Danysz M, Drago A Pagliara G, Irina Sagert, Jürgen Schaffner-Bielich, Kabana S, Mirjam Wietoska, Ozerov D, Sagert I, Sagert I Schaffner-Bielich J, Salur S (STAR), Vernet R, Wietoska M Schaffner-Bielich J, Wietoska Mirjam   +15 more
core   +4 more sources

Terahertz‐Driven Ultrafast Dynamics of Rare‐Earth Nickelates by Controlling Only the Charge Degree of Freedom

Advanced Functional Materials, EarlyView.
The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati, Sergey Kovalev, Igor Ilyakov, Atiqa Arshad, Gaurav Dubey, Ketan S. Navale, Dhanvir Singh Rana, Jan‐Christoph Deinert   +7 more
wiley   +1 more source

Radial Oscillations of Quark Stars Admixed with Dark Matter

Universe, 2022
We investigated compact stars consisting of cold quark matter and fermionic dark matter treated as two admixed fluids. We computed the stellar structures and fundamental radial oscillation frequencies of different masses of the dark fermion in the cases ...
José C. Jiménez, Eduardo S. Fraga
doaj   +1 more source

Strange stars at finite temperature

, 2006
We calculate strange star properties, using large N_c approximation with built-in chiral symmetry restoration (CSM). We used a relativistic Hartree Fock mean field approximation method, using a modified Richardson potential with two scale parameters ...
Alford M G, Haensel P, Jishnu Dey, Malheiro M, Manjari Bagchi, Mira Dey, Ray S, Ray S, Subharthi Ray   +8 more
core   +2 more sources

Is SAX J1808.4-3658 a Strange Star ? [PDF]

, 1999
One of the most important questions in the study of compact objects is the nature of pulsars, including whether they are composed of $\beta$-stable nuclear matter or strange quark matter. Observations of the newly discovered millisecond X-ray pulsar \sax
A. Olinto, A. R. Bodmer, B. Datta, C. Alcock, C. Alcock, D. B. Kaplan, D. B. Kaplan, D. Bhattacharya, D. Chakrabarty, D. Psaltis, E. Farhi, E. P. J. van den Heuvel, E. Witten, I. Bombaci, I. Bombaci, J. Arons, J. J. Aly, J. J. M. in't Zand, J. Miralda-Escudé, J. Schaffner, Jishnu Dey, K. S. Cheng, K. S. Cheng, L. Burderi, M. Baldo, M. Colpi, M. Dey, M. Gilfanov, M. Prakash, Mira Dey, N. A. Gentile, N. K. Glendenning, N. K. Glendenning, P. A. Sturrock, P. Haensel, P. Haensel, R. B. Wiringa, R. V. E. Lovelace, R. Wijnands, S. L. Shapiro, T. Maruyama, T. Muto, T. Tatsumi, V. R. Pandharipande, V. Thorsson, W. A. Heindl, W. Cui, W. H. G. Lewin, X.-D. Li, X.-D. Li, X.-D. Li   +50 more
core   +3 more sources

Understanding and Addressing the Performance Asymmetry Issue in Semitransparent Laminated Organic Photovoltaic Devices

Advanced Functional Materials, EarlyView.
This work addresses the challenge of current–voltage asymmetry in scalable laminated semitransparent organic photovoltaics (OPVs) for indoor applications. Vertical stratification of materials is shown to create an energy barrier, leading to performance differences under different illumination directions.
Gulzada Beket, Anton Zubayer, Leonie Pap, Huagui Lai, Samiran Bairagi, Nakul Jain, Jochen Stahn, Fan Fu, Kenneth Järrendahl, Fredrik Eriksson, Xabier Rodríguez‐Martínez, Olle Inganäs, Uli Würfel, Thomas Österberg, Jonas Bergqvist, Feng Gao   +15 more
wiley   +1 more source

Cracking Strange Stars by Torsional Oscillations

Universe, 2018
Strange stars are one of the possible compact stellar objects formed in the core collapse of supernovae. These hypothetical stars are made by deconfined quark matter and are selfbound.
Francesco Tonelli, Massimo Mannarelli
doaj   +1 more source

A new approach to bulk viscosity in strange quark matter at high densities

, 2009
A new method is proposed to compute the bulk viscosity in strange quark matter at high densities. Using the method it is straightforward to prove that the bulk viscosity is positive definite, which is not so easy to accomplish in other approaches ...
Alford M G, Alford M G, Andersson N, Chatterjee D Bandyopadhyay D, Chatterjee D Bandyopadhyay D, Dai Z G, Dong H, Friedman J L, Haensel P, Hui Dong, Lai D, Manuel C, Qun Wang, Schaffner-Bielich J, Schaffner-Bielich J Schramm S Stocker H, Shou-wan Chen   +15 more
core   +1 more source

Strange matter in the string-flip model [PDF]

, 1999
We employ variational Monte Carlo methods to study the transition to strange matter in a simple one-dimensional string-flip model with two flavors and two colors of quarks.
A. B. Migdal, C. J. Horowitz, C. J. Horowitz, C. J. Horowitz, C. J. Horowitz, Danielle Morel, E. Farhi, E. Farhi, E. Witten, F. Lenz, G. M. Frichter, J. Piekarewicz, J. Piekarewicz, J. Schaffner, J. W. Negele, N. Isgur, N. Isgur, N. K. Glendenning, O. W. Greenberg, P. J. S. Watson, T. A. Armstrong   +20 more
core   +3 more sources