Results 61 to 70 of about 1,604 (160)

The current landscape fire management in Ukraine and strategy for its improvement

Environmental & Socio-economic Studies, 2021
Recurrent wildfires in Ukraine exert severe impacts on the environment, human health and security as well as damage to private and public assets. From 2007 to 2020, the frequency of large wildfires has increased and reached a level that has not occurred ...
Soshenskyi Oleksandr, Zibtsev Sergiy, Gumeniuk Vasyl, Goldammer Johann Georg, Vasylyshyn Roman, Blyshchyk Volodymyr   +5 more
doaj   +1 more source

Tuning the Mutual Synchronization of Electrically Coupled Spin‐Torque Oscillators by Selecting the Vortex Dynamic Regime

Advanced Electronic Materials, Volume 11, Issue 9, June 2025.
The synchronization ability of vortex spin‐torque nano‐oscillators is examined across three dynamical regimes: the gyrotropic mode, the dynamic C‐state, and a transition regime. The transition regime exhibits the strongest synchronization ability, and it can be driven into a dynamic state with no ability to synchronize (dynamic C‐state) by slightly ...
Miguel Romera, Philippe Talatchian, Steffen Wittrock, Romain Lebrun, Karla J. Merazzo, Paolo Bortolotti, Laurent Vila, Ricardo Ferreira, Marie Claire Cyrille, Ursula Ebels, Vincent Cros, Julie Grollier   +11 more
wiley   +1 more source

Dynamical supersymmetry breaking and phase diagram of the lattice Wess-Zumino model

, 2005
We study dynamical supersymmetry breaking and the transition point by non-perturbative lattice techniques in a class of two-dimensional N=1 Wess-Zumino model.
Beccaria, Matteo, Campostrini, Massimo, De Angelis, Gian Fabrizio, Feo, Alessandra   +3 more
core   +1 more source

Increasing Fire Weather Season Overlap Between North America and Australia Challenges Firefighting Cooperation

Earth's Future, Volume 13, Issue 4, April 2025.
Abstract The USA, Canada and Australia are members of an international partnership that shares firefighting resources, including equipment and personnel. This partnership is effective because fire risk between Australia and North America is historically asynchronous. However, climate change is causing longer fire seasons in both regions, increasing the
Doug Richardson, Andreia F. S. Ribeiro, Fulden Batibeniz, Yann Quilcaille, Andrea S. Taschetto, Andrew J. Pitman, Jakob Zscheischler   +6 more
wiley   +1 more source

Induced Ti magnetization at La0.7Sr0.3MnO3 and BaTiO3 interfaces

APL Materials, 2016
In artificial multiferroics hybrids consisting of ferromagnetic La0.7Sr0.3MnO3 (LSMO) and ferroelectric BaTiO3 epitaxial layers, net Ti moments are found from polarized resonant soft x-ray reflectivity and absorption. The Ti dichroic reflectivity follows
Yaohua Liu, J. Tornos, S. G. E. te Velthuis, J. W. Freeland, H. Zhou, P. Steadman, P. Bencok, C. Leon, J. Santamaria   +8 more
doaj   +1 more source

A quantum Monte Carlo study of the one-dimensional ionic Hubbard model

, 2000
Quantum Monte Carlo methods are used to study a quantum phase transition in a 1D Hubbard model with a staggered ionic potential (D). Using recently formulated methods, the electronic polarization and localization are determined directly from the ...
A.A. Aligia, B. L. Hammond, C. Gros, C.A. Coulson, D. Baeriswyl, D. J. Griffiths, D.F.B. ten Haaf, D.H. Lee, D.J. Scalapino, E.H. Lieb, E.V. Tsiper, Erik Koch, F. Bolton, G. Ortiz, G. Ortiz, G. Ortiz, G.W. Hayden, Guozhong An, I. Souza, I.I. Ukrainskiĭ, J. Hubbard, J.B. Torrance, J.C. Slater, J.E. Hirsh, J.L. Black, J.M.P. Carmelo, Joel W. Cannon, K. Hashimoto, L.D. Landau, M. Imada, M.C. Gutzwiller, M.J. Rice, M.V. Berry, Masaaki Nakamura, Michele Fabrizio, N. Beyers, N. Marzari, N. Metropolis, N. Nagaosa, N.F. Mott, N.F. Mott, Nandini Trivedi, P. Horsch, R. Resta, R. Resta, R. Resta, R. Resta, R.D. King-Smith, R.M. Martin, Richard M. Martin, T. Egami, Tim Wilkens, W. Kohn, W.P. Su, Z.G. Soos   +54 more
core   +1 more source

Per‐Unit Modeling Standards for Simplified Calculation in Grid‐Forming Converter Systems

Electronics Letters, Volume 61, Issue 1, January/December 2025.
The topology and control scheme of GFMC systems. ABSTRACT This letter proposes a per‐unit modeling standard (PUMS) for simplified calculations in grid‐forming converter (GFMC) systems, which can improve and simplify the modeling process. The proposed PUMS can solve the bottlenecks and difficulties of calculation caused by the upper limits of ...
Mufan Wang, Fan Li, Shuyi Shen, Xiahui Zhang, Zhiheng Shen, Xinhua Xiong, Chang Li   +6 more
wiley   +1 more source

Neutron Drops and Skyrme Energy-Density Functionals

, 1995
The J$^{\pi}$=0$^+$ ground state of a drop of 8 neutrons and the lowest 1/2$^-$ and 3/2$^-$ states of 7-neutron drops, all in an external well, are computed accurately with variational and Green's function Monte Carlo methods for a Hamiltonian containing
A. Smerzi, B. Friedman, B. S. Pudliner, B. S. Pudliner, C. J. Pethick, C. J. Pethick, D. G. Ravenhall, D. G. Ravenhall, D. M. Ceperley, D. Vautherin, H. Krivine, J. Carlson, J. Dobaczewski, K.-L. Kratz, M. A. Lee, M. B. Leuschner, P. J. Siemens, R. B. Wiringa, S. C. Pieper, S. C. Pieper, Steven C. Pieper, V. R. Pandharipande, V. R. Pandharipande   +22 more
core   +1 more source

Parameter Optimization of Grid‐Forming Converters by Maximizing Domain of Attraction Estimates of Converter‐Integrated Power Systems

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
Grid‐forming converters (GFMCs) are expected to replace synchronous generators (SGs) in future power systems with high penetration of power electronics. This paper proposes a controller parameter optimization method for GFMCs by maximizing the domain of attraction estimates using sum‐of‐squares programming, significantly improving transient stability ...
Yang Liu, Qianghui Hao, Zhenjia Lin, Yuanzheng Li, Qiuwei Wu, Yiming Ma   +5 more
wiley   +1 more source

Proposing a Governance Model for Environmental Crises

Land, 2023
During August 2021, a wildfire outbreak in Evia, Greece’s second largest island, resulted in a major environmental and economic crisis. Apart from biodiversity and habitat loss, the disaster triggered a financial crisis because it wiped out wood ...
Evangelia Karasmanaki, Giorgos Mallinis, Ioannis Mitsopoulos, Apostolos Karteris, Irene Chrysafis, Dimitrios Bakaloudis, Ioannis P. Kokkoris, Fotis Maris, Margarita Arianoutsou, Johann G. Goldammer, Francisco Rego, V. Ramon Vallejo, Georgios Tsantopoulos   +12 more
doaj   +1 more source