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We investigate some new features of different nonlinear time-dependent models. We consider the time-dependent interaction between an atom (or more) and cavity field for one-mode and two-mode cavity fields. The idea of using the explicit time-dependence on the atom-field couplings, but for extended models are presented. The models describe one- and two-photon process and include detuning parameters, nonlinear Kerr-medium, Stark-shift and intensity-dependent coupling. Numerical investigations are used to test the quantum entanglement, geometric phase, atomic population inversion, phase...

Helminthic invasion of biliary tracts is a prominent medical and surgical problem especially in tropical and subtropical areas where these parasites are endemic.Parasites in the biliary tree causes a variety of manifestations referred to as the 'Oriental cholangiohepatitis' syndrome. Features of this syndrome include helminthiasis, biliary stones formation, choledochal obstruction and recurrent cholangitis.

This book seeks to revise and challenge the roles and traditional realms of influence that national and local governments, and businesses at a critical juncture in terms of achieving sustainable development, faces when tackling the dual challenges of climate change and post-COVID recovery. Using the broader lens of the 2030 UN Sustainable Development Goals (SDGs) to assess the roles and responsibilities of each of these stakeholders and their relationships, the book offers policy, economic arguments, case studies and examples to argue that neither national or local governments, nor...

The potato (Solanum tuberosum L.) is the worlds most important root and tuber crop worldwide. It is grown in more than 125 countries and consumed almost daily by more than a billion people.Hundreds of millions of people in developing countries depend on potatoes for their survival. Potato cultivation is expanding strongly in the developing world, where the potatoes easy cultivated and it nutritive content have made it a valuable food security and cash crop for millions of farmers.