03057nam 2200445z- 450 991034675140332120231214133411.0(CKB)4920000000094200(oapen)https://directory.doabooks.org/handle/20.500.12854/53408(EXLCZ)99492000000009420020202102d2018 |y 0engurmn|---annantxtrdacontentcrdamediacrrdacarrierMicrobiology of the Rapidly Changing Polar EnvironmentsFrontiers Media SA20181 electronic resource (315 p.)Frontiers Research Topics2-88945-513-0 Marine and freshwater polar environments are characterized by intense physical forces and strong seasonal variations. The persistent cold and sometimes inhospitable conditions create unique ecosystems and habitats for microbial life. Polar microbial communities are diverse productive assemblages, which drive biogeochemical cycles and support higher food-webs across the Arctic and over much of the Antarctic. Recent studies on the biogeography of microbial species have revealed phylogenetically diverse polar ecotypes, suggesting adaptation to seasonal darkness, sea-ice coverage and high summer irradiance. Because of the diversity of habitats related to atmospheric and oceanic circulation, and the formation and melting of ice, high latitude oceans and lakes are ideal environments to investigate composition and functionality of microbial communities. In addition, polar regions are responding more dramatically to climate change compared to temperate environments and there is an urgent need to identify sensitive indicators of ecosystem history, that may be sentinels for change or adaptation. For instance, Antarctic lakes provide useful model systems to study microbial evolution and climate history. Hence, it becomes essential and timely to better understand factors controlling the microbes, and how, in turn, they may affect the functioning of these fragile ecosystems. Polar microbiology is an expanding field of research with exciting possibilities to provide new insights into microbial ecology and evolution. With this Research Topic we seek to bring together polar microbiologists studying different aquatic systems and components of the microbial food web, to stimulate discussion and reflect on these sensitive environments in a changing world perspective.polarmicroeukaryotesbacteriamicrobiologyphytoplanktonAntarcticaArcticaquaticarchaeaclimate changeEva Ortega-Retuertaauth1331923Connie LovejoyauthJulie DinasquetauthIngrid ObernostererauthBOOK9910346751403321Microbiology of the Rapidly Changing Polar Environments3040655UNINA04036nam 2200553 a 450 991048452690332120200520144314.03-540-76956-010.1007/978-3-540-76956-9(CKB)1000000000438279(SSID)ssj0000318835(PQKBManifestationID)11265702(PQKBTitleCode)TC0000318835(PQKBWorkID)10336284(PQKB)10622625(DE-He213)978-3-540-76956-9(MiAaPQ)EBC3068724(PPN)127048685(EXLCZ)99100000000043827920080122d2008 uy 0engurnn#008mamaatxtccrMathematical theory of Feynman path integrals an introduction /Sergio A. Albeverio, Raphael J. Hegh-Krohn, Sonia Mazzucchi2nd corr. and enl. ed.Berlin Springerc20081 online resource (X, 182 p.)Lecture notes in mathematics,0075-8434 ;523Bibliographic Level Mode of Issuance: Monograph3-540-76954-4 Includes bibliographical references (p. [141]-171) and index.Preface to the second edition -- Preface to the first edition -- 1.Introduction -- 2.The Fresnel Integral of Functions on a Separable Real Hilbert Spa -- 3.The Feynman Path Integral in Potential Scattering -- 4.The Fresnel Integral Relative to a Non-singular Quadratic Form -- 5.Feynman Path Integrals for the Anharmonic Oscillator -- 6.Expectations with Respect to the Ground State of the Harmonic Oscillator -- 7.Expectations with Respect to the Gibbs State of the Harmonic Oscillator -- 8.The Invariant Quasi-free States -- 9.The Feynman Hystory Integral for the Relativistic Quantum Boson Field -- 10.Some Recent Developments -- 10.1.The infinite dimensional oscillatory integral -- 10.2.Feynman path integrals for polynomially growing potentials -- 10.3.The semiclassical expansio -- 10.4.Alternative approaches to Feynman path integrals -- 10.4.1.Analytic continuation -- 10.4.2.White noise calculus -- 10.5.Recent applications -- 10.5.1.The Schroedinger equation with magnetic fields -- 10.5.2.The Schroedinger equation with time dependent potentials -- 10.5.3 .hase space Feynman path integrals -- 10.5.4.The stochastic Schroedinger equation -- 10.5.5.The Chern-Simons functional integral -- References of the first edition -- References of the second edition -- Analytic index -- List of Notations.Feynman path integrals, suggested heuristically by Feynman in the 40s, have become the basis of much of contemporary physics, from non-relativistic quantum mechanics to quantum fields, including gauge fields, gravitation, cosmology. Recently ideas based on Feynman path integrals have also played an important role in areas of mathematics like low-dimensional topology and differential geometry, algebraic geometry, infinite-dimensional analysis and geometry, and number theory. The 2nd edition of LNM 523 is based on the two first authors' mathematical approach of this theory presented in its 1st edition in 1976. To take care of the many developments since then, an entire new chapter on the current forefront of research has been added. Except for this new chapter and the correction of a few misprints, the basic material and presentation of the first edition has been maintained. At the end of each chapter the reader will also find notes with further bibliographical information.Lecture notes in mathematics (Springer-Verlag) ;523.Feynman integralsFeynman integrals.515.43Albeverio Sergio44256Hoegh-Krohn Raphael334661Mazzucchi Sonia508832MiAaPQMiAaPQMiAaPQBOOK9910484526903321Mathematical Theory of Feynman Path Integrals774394UNINA