دانلود کتاب خارجی - دانلود رایگان کتاب لاتین PDF علمی

تعداد نتایج: 4221

Personal and Global Ascension - 2012 - 2017

By Inelia Benz
Publisher: Lulu.com, 2015-04-16
Pages: 400
Language: en
ISBN_13:9781329070424
ISBN_10:1329070429
Subject: Self-Help

Are You a Witch?

جزئیات و درخواست

By Inelia Benz
Publisher: Lulu.com, 2016-01-18
Pages: 234
Language: en
ISBN_13:9781329832732
ISBN_10:1329832736
Subject: Reference

The Return

جزئیات و درخواست

By Inelia Benz
Publisher: Lulu.com, 2018-04-25
Pages: 258
Language: en
ISBN_13:9781387763429
ISBN_10:1387763423
Subject: Fiction

Interview with an Angel

جزئیات و درخواست

By Inelia Benz
Publisher: Lulu.com, 2016-11-29
Pages: 174
Language: en
ISBN_13:9781365553998
ISBN_10:136555399X
Subject: Religion

Economic Outlook for Southeast Asia, China and India 2018 Fostering Growth through Digitalisation

Fostering Growth through Digitalisation

جزئیات و درخواست

By OECD
Publisher: OECD Publishing, 2018-02-12
Pages: 242
Language: en
ISBN_13:9789264286184
ISBN_10:9264286187

Global Economic History

A Very Short Introduction

جزئیات و درخواست

By Robert C. Allen
Publisher: OUP Oxford, 2011-09-15
Pages: 225
Language: en
ISBN_13:9780191620539
ISBN_10:019162053X
Subject: Business & Economics

Arab Women and Their Evolving Roles in the Global Business Landscape

جزئیات و درخواست

By Al-A'ali, Ebtihaj, Al-Shammari, Minwir M., Masri, Hatem
Publisher: IGI Global, 2017-12-01
Pages: 336
Language: en
ISBN_13:9781522537113
ISBN_10:1522537112
Subject: Social Science

Transnational Social Protection

Social Welfare Across National Borders

جزئیات و درخواست

By Peggy Levitt, Ken Chih-Yan Sun, Erica Dobbs, Ruxandra Paul
Publisher: Oxford University Press, 2023
Pages: 241
Language: en
ISBN_13:9780197666821
ISBN_10:0197666825
Subject: Political Science

International Business

جزئیات و درخواست

By Shad Morris, James Oldroyd
Publisher: John Wiley & Sons, 2020-07-21
Pages: 432
Language: en
ISBN_13:9781119679783
ISBN_10:1119679788
Subject: Business & Economics

The Era of Chinese Multinationals

Competing for Global Dominance

جزئیات و درخواست

By Lourdes Casanova, Anne Miroux
Publisher: Academic Press, 2019-11-08
Pages: 254
Language: en
ISBN_13:9780128168578
ISBN_10:0128168579
Subject: Business & Economics

$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

Diplomatic Strategies of Rising Nations in the Global South

The Search for Leadership and Influence

جزئیات و درخواست

By Jacqueline Anne Braveboy-Wagner
Publisher: Springer Nature,
Pages: 485
Language: en
ISBN_13:9783031526299
ISBN_10:3031526295

When East Asia Meets Southeast Asia: Presence And Connectedness In Transformation Revisited

جزئیات و درخواست

By Yumi Kitamura, Alan Hao Yang, Ju Lan Thung
Publisher: World Scientific, 2022-10-04
Pages: 403
Language: en
ISBN_13:9789811250675
ISBN_10:9811250677
Subject: Political Science

Encyclopedia of Global Religion

جزئیات و درخواست

By Mark Juergensmeyer, Wade Clark Roof
Publisher: SAGE, 2012
Pages: 1529
Language: en
ISBN_13:9780761927297
ISBN_10:0761927298
Subject: Computers

Multilateralism in Peril

The Uneasy Triangle of the US, China and the EU

جزئیات و درخواست

By Chien-Huei Wu, Frank Gaenssmantel, Francesco Giumelli
Publisher: Taylor & Francis, 2022-09-09
Pages: 215
Language: en
ISBN_13:9781000646764
ISBN_10:1000646769
Subject: Political Science

Research Handbook on Self-Employment and Public Policy

جزئیات و درخواست

By Wieteke Conen, Enrico Reuter
Publisher: Edward Elgar Publishing, 2024-08-06
Pages: 523
Language: en
ISBN_13:9781800881860
ISBN_10:180088186X
Subject: Political Science

Say What?

A Biblical and Historical Journey on the Connection between ...

جزئیات و درخواست

By Jeremiah Campbell
Publisher: Wipf and Stock Publishers, 2018-03-27
Pages: 100
Language: en
ISBN_13:9781532647017
ISBN_10:1532647018
Subject: Religion

COVID-19 Syndemics and the Global South

A World Divided

جزئیات و درخواست

By Inayat Ali, Merrill Singer, Nicola Bulled
Publisher: Taylor & Francis, 2024-07-31
Pages: 201
Language: en
ISBN_13:9781040020937
ISBN_10:1040020933
Subject: Social Science

UFOs, Conspiracy Theories and the New Age

Millennial Conspiracism

جزئیات و درخواست

By David G. Robertson
Publisher: Bloomsbury Publishing, 2017-08-24
Pages: 265
Language: en
ISBN_13:9781350044982
ISBN_10:1350044989
Subject: Fiction

The Statesman's Yearbook 2023

The Politics, Cultures and Economies of the World

جزئیات و درخواست

By Palgrave Macmillan
Publisher: Springer Nature, 2023-01-04
Pages: 1430
Language: en
ISBN_13:9781349960569
ISBN_10:134996056X
Subject: Political Science

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