دانلود کتاب خارجی - دانلود رایگان کتاب لاتین PDF علمی

تعداد نتایج: 600

Aufklärung und Romantik in Lateinamerika

ein Beitrag zu Identität, Vergleich und Wechselwirkung zwisc...

By Heinz Krumpel
Publisher: Peter Lang, 2004
Pages: 308
Language: de
ISBN_10:3631502184
ISBN_13:9783631502181
Subject: History

Hydraulic Engineering

جزئیات و درخواست

By John A. Roberson, John J. Cassidy, M. Hanif Chaudhry
Publisher: John Wiley & Sons, 1998-02-12
Pages: 676
Language: en
ISBN_13:9780471124665
ISBN_10:0471124664
Subject: Technology & Engineering

A - L

جزئیات و درخواست

By Werner Schuder
Publisher: Walter de Gruyter GmbH & Co KG, 2020-05-18
Pages: 1596
Language: de
ISBN_13:9783112316252
ISBN_10:3112316258
Subject: Reference

The Structure of Materials

جزئیات و درخواست

By Samuel M. Allen, Edwin L. Thomas
Publisher: John Wiley & Sons, 1999-03-22
Pages: 485
Language: en
ISBN_13:9780471000822
ISBN_10:0471000825
Subject: Technology & Engineering

Business Ethics

Violations of the Public Trust

جزئیات و درخواست

By Robert F. Hartley
Publisher: John Wiley & Sons, 1993-03-10
Pages: 342
Language: en
ISBN_13:9780471545910
ISBN_10:0471545910
Subject: Business & Economics

An Introduction to Mass and Heat Transfer

Principles of Analysis and Design

جزئیات و درخواست

By Stanley Middleman
Publisher: John Wiley & Sons, 1997-10-30
Pages: 710
Language: en
ISBN_13:9780471111764
ISBN_10:0471111767
Subject: Technology & Engineering

Aerodynamics, Aeronautics, and Flight Mechanics

جزئیات و درخواست

By Barnes W. McCormick
Publisher: John Wiley & Sons, 1994-09-28
Pages: 677
Language: en
ISBN_13:9780471575061
ISBN_10:0471575062
Subject: Technology & Engineering

$The last 50 years have seen a tremendous progress in the research on quasars. From a time when quasars were unforeseen oddities, we have come to a view that considers quasars as active galactic nuclei, with nuclear activity a coming-of-age experienced by most or all galaxies in their evolution. We have passed from a few tens of known quasars of the early 1970s to the 500,000 listed in the catalogue of the Data Release 14 of the Sloan Digital Sky Survey. Not surprisingly, accretion processes on the central black holes in the nuclei of galaxies — the key concept in our understanding of quasars and active nuclei in general — have gained an outstanding status in present-day astrophysics. Accretion produces a rich spectrum of phenomena in all bands of the electromagnetic spectrum. The power output of highly-accreting quasars has impressive effects on their host galaxies. All the improvement in telescope light gathering and in computing power notwithstanding, we still miss a clear connection between observational properties and theory for quasars, as provided, for example, by the H-R diagram for stars. We do not yet have a complete self-consistent view of nuclear activity with predictive power, as we do for main-sequence stellar sources. At the same time quasars offer many “windows open onto the unknown". On small scales, quasar properties depend on phenomena very close to the black hole event horizon. On large scales, quasars may effect evolution of host galaxies and their circum-galactic environments. Quasars’ potential to map the matter density of the Universe and help reconstruct the Universe’s spacetime geometry is still largely unexploited. The times are ripe for a critical assessment of our present knowledge of quasars as accreting black holes and of their evolution across the cosmic time. The foremost aim of this research topic is to review and contextualize the main observational scenarios following an empirical approach, to present and discuss the accretion scenario, and then to analyze how a closer connection between theory and observation can be achieved, identifying those aspects of our understanding that are still on a shaky terrain and are therefore uncertain knowledge. This research topic covers topics ranging from the nearest environment of the black hole, to the environment of the host galaxies of active nuclei, and to the quasars as markers of the large scale structure and of the geometry of spacetime of the Universe. The spatial domains encompass the accretion disk, the emission and absorption regions, circum-nuclear starbursts, the host galaxy and its interaction with other galaxies. Systematic attention is devoted to some key problems that remain outstanding and are clearly not yet solved: the existence of two quasar classes, radio quiet and radio loud, and in general, the systematic contextualization of quasar properties the properties of the central black hole, the dynamics of the accretion flow in the inner parsecs and the origin of the accretion matter, the quasars’ small and large scale environment, the feedback processes produced by the black hole into the host galaxy, quasar evolutionary patterns from seed black holes to the present-day Universe, and the use of quasars as cosmological standard candles. The timing is appropriate as we are now witnessing a growing body of results from major surveys in the optical, UV X, near and far IR, and radio spectral domains. Radio instrumentation has been upgraded to linear detector — a change that resembles the introduction of CCDs for optical astronomy — making it possible to study radio-quiet quasars at radio frequencies. Herschel and ALMA are especially suited to study the circum-nuclear star formation processes. The new generation of 3D magnetohydrodynamical models offers the prospective of a full physical modeling of the whole quasar emitting regions. At the same time, on the forefront of optical astronomy, applications of adaptive optics to long-slit spectroscopy is yielding unprecedented results on high redshift quasars. Other measurement techniques like 2D and photometric reverberation mapping are also yielding an unprecedented amount of data thanks to dedicated experiments and instruments. Thanks to the instrumental advances, ever growing computing power as well as the coming of age of statistical and analysis techniques, the smallest spatial scales are being probed at unprecedented resolution for wide samples of quasars. On large scales, feedback processes are going out of the realm of single-object studies and are entering into the domain of issues involving efficiency and prevalence over a broad range of cosmic epochs. The Research Topic "Quasars at all Cosmic Epochs" collects a large fraction of the contributions presented at a meeting held in Padova, sponsored jointly by the National Institute for Astrophysics, the Padova Astronomical Observatory, the Department of Physics and Astronomy of the University of Padova, and the Instito de Astrofísica de Andalucía (IAA) of the Consejo Superiór de Investigación Cientifica (CSIC). The meeting has been part of the events meant to celebrate the 250th anniversary of the foundation of the Padova Observatory.$

جزئیات و درخواست

By Paola Marziani, Mauro D'Onofrio, Ascensión del Olmo, Deborah Dultzin
Publisher: Frontiers Media SA, 2018-10-05
Pages: 447
Language: en
ISBN_13:9782889456048
ISBN_10:2889456048

Practical Nonparametric Statistics

جزئیات و درخواست

By W. J. Conover
Publisher: John Wiley & Sons, 1999-01-07
Pages: 608
Language: en
ISBN_13:9780471160687
ISBN_10:0471160687
Subject: Mathematics

The Elusive Promise of Indigenous Development

Rights, Culture, Strategy

جزئیات و درخواست

By Karen Engle
Publisher: Duke University Press, 2010-09-17
Pages: 419
Language: en
ISBN_13:9780822392965
ISBN_10:0822392968
Subject: History

Applications of statistical methods and machine learning in the space sciences

جزئیات و درخواست

By Bala Poduval, Karly Pitman, Olga Verkhoglyadova, Peter Wintoft
Publisher: Frontiers Media SA, 2023-04-12
Pages: 203
Language: en
ISBN_13:9782832520581
ISBN_10:2832520588
Subject: Science

Estructuras Laminares en la Arquitectura Colombiana (1945-1970)

جزئیات و درخواست

By Jorge Alberto Galindo Díaz
Publisher: Universidad Nacional de Colombia, 2020-07-14
Pages: 260
Language: es
ISBN_13:9789587940268
ISBN_10:9587940261
Subject: Architecture

Biostatistics

A Foundation for Analysis in the Health Sciences

جزئیات و درخواست

By Wayne W. Daniel
Publisher: Wiley, 1998-08-27
Pages: 814
Language: en
ISBN_10:0471588520
ISBN_13:9780471588528
Subject: Medical

Statistical Reasoning and Methods

جزئیات و درخواست

By Richard Arnold Johnson
2004
Pages: 656
Language: en
ISBN_10:0471483273
ISBN_13:9780471483274
Subject: Mathematical statistics

Fast Fat Loss Plan

جزئیات و درخواست

By Daniel Burke
Publisher: The Fast Fat Loss Plan, 2007
Pages: 206
Language: en
ISBN_13:9781427625229
ISBN_10:1427625220

Report of the Board of Visitors

جزئیات و درخواست

By Letchworth Village, Thiells, N.Y.
1965
Pages: 46
Language: en
OTHER:UOM:39015067924210

Independence for Puerto Rico

Hearings, Seventy-ninth Congress, First Session on S. 227

Free Epub

جزئیات و درخواست

By United States. Congress. Senate. Committee on Territories and Insular Affairs
1945
Pages: 768
Language: en
OTHER:UCBK:C051769518
Subject: Puerto Rico

Hearings

Free Epub

جزئیات و درخواست

By United States. Congress Senate
1945
Pages: 752
Language: en
OTHER:UOM:35112104248861

Introducing Computers

Concepts, Systems, and Applications

جزئیات و درخواست

By Robert H. Blissmer
Publisher: Wiley, 1995-03-03
Pages: 340
Language: en
ISBN_10:0471113603
ISBN_13:9780471113607
Subject: Computers

Theory and Practice of Water and Wastewater Treatment

جزئیات و درخواست

By Ronald L. Droste
1997
Pages: 828
Language: en
OTHER:UOM:39015048286408
Subject: Science

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