82,904 research outputs found

    Success Stories in Asian Aquaculture

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    The stories presented in this book reflect the unique nature of Asian aquaculture, providing first-time insight into how and why it has become so successful. Overall, the book demonstrates how the resiliency, adaptability, and innovation of small-scale aquaculture farmers have been crucial to this success. It also places aquaculture development in Asia into a wider global context, and describes its relationship to natural systems, social conditions, and economics. The book is unique in its in-depth presentation of primary research on Asian aquaculture, and in demonstrating how aquaculture can have a lasting positive impact on livelihoods, food security, and sustainable development

    Regular black holes in f(G)f(G) gravity

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    In this work, we study the possibility of generalizing solutions of regular black holes with an electric charge, constructed in general relativity, for the f(G)f(G) theory, where GG is the Gauss-Bonnet invariant. This type of solution arises due to the coupling between gravitational theory and nonlinear electrodynamics. We construct the formalism in terms of a mass function and it results in different gravitational and electromagnetic theories for which mass function. The electric field of these solutions are always regular and the strong energy condition is violated in some region inside the event horizon. For some solutions, we get an analytical form for the f(G)f(G) function. Imposing the limit of some constant going to zero in the f(G)f(G) function we recovered the linear case, making the general relativity a particular case.Comment: 22 pages, 25 figures.Version published in EPJ

    Anicut systems in Sri Lanka: The case of the Upper Walawe River Basin

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    Water resources / Tanks / Water use / River basins / Hydrology / Irrigation systems / Water shortage / Crops / Doemstic water / Fuelwood / Cultivation / Deforestation / Water supply / Economic development / Water management / Institutions / Land reform

    Spontaneous CP violation in the 3-3-1 model with right-handed neutrinos

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    We implement the mechanism of spontaneous CP violation in the 3-3-1 model with right-handed neutrinos and recognize their sources of CP violation. Our main result is that the mechanism works already in the minimal version of the model and new sources of CP violation emerges as an effect of new physics at energies higher than the electroweak scale.Comment: Major changes in the quark sector, electronic dipole moment of the neutron was evaluated, accepted for publication in the physical review
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