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Start your reading journey today on DL4ALL.org and unlock a world of imagination, knowledge, and inspiration!  Free Download Angle-Resolved Photoemission Study of Kagome Superconductors AV3Sb5 (A = K, Rb, Cs) English | 2025 | ISBN: 981963881X | 128 Pages | PDF (True) | 18 MB This book presents high-resolution angle-resolved photoemission spectroscopy (ARPES) experiments on kagome superconductors KV3Sb5, RbV3Sb5, and CsV3Sb5―an ideal material family for studying rich physical phenomena originating from the geometric structure of kagome lattice―with the aim of elucidating the electronic structure and the origin of charge density wave (CDW) and superconductivity. The book begins with an introduction to kagome superconductors, followed by a description of ARPES which is the main tool used in the presented work in this book. The part of the experimental results consists of three chapters: The first chapter describes observation of low-energy excitations, Fermi-surface and momentum-dependent CDW gap by high-resolution ARPES on CsV3Sb5 and KV3Sb5; the second chapter shows evolution of electronic states upon alkali-metal dosing and isovalent substitution, and discusses their relation to modulation of physical properties; the other chapter provides the result of micro-ARPES on KV3Sb5, RbV3Sb5, and CsV3Sb5, and demonstrates the surface-termination- and alkali-metal-dependent three dimensional CDW character.  Free Download Ancient Greek II: A 21st-Century Approach by Philip S Peek English | March 31, 2025 | ISBN: 1805114727 | 818 pages | PDF | 219 Mb In this elementary textbook, Philip S. Peek draws on his twenty-five years of teaching experience to present the ancient Greek language in an imaginative and accessible way that promotes creativity, deep learning, and diversity.  Free Download Analysis of Electric Machinery and Drive Systems by Paul C. Krause, Oleg Wasynczuk, Scott D. Sudhoff, Steven D. Pekarek English | 2025 | ISBN: 1394293860 | 483 pages | True PDF EPUB | 44.62 MB  Free Download An APEC Trade Agenda?: The Political Economy of a Free Trade Area of the Asia-Pacific By Charles E. Morrison (editor); Eduardo Pedrosa (editor) 2007 | 264 Pages | ISBN: 9812304614 | PDF | 1 MB The proposal for an Asia-Pacific-wide free trade agreement is one of the oldest ideas for promoting mutually beneficial regional cooperation dating back to the mid-1960s. In more recent times, the idea has found new support for two main reasons: as a plan B to the stumbling Doha Development Agenda (DDA) round of WTO negotiations; and as a solution to the noodle bowl of bilateral agreements in the region. This report assesses the political feasibility of the Free Trade Area of the Asia-Pacific (FTAAP) proposal and looks at alternative modalities for achieving free trade and investment in the Asia-Pacific. The report includes trade policy perspectives from the three largest economies of the region: the United States, China and Japan, lessons from similar proposals such as the Free Trade Area of the Americas (FTAA), possible convergence among the many preferential trade agreements (PTAs) in the region, and alternative approaches to regional economic integration.  Free Download Aluminum Alley: The American Pilots Who Flew Over the Himalayas and Helped Win World War II by Rory Laverty English | May 2, 2023 | ISBN: 0811772624 | 288 pages | EPUB | 1.84 Mb By the time Japan attacked Pearl Harbor on December 7, 1941, China was already under siege. The Imperial military invaded and choked off every land and sea route for the young country's resupply, and what remained of China was out of gas and withering away. So in April 1942 the United States decided to help out, by trying something entirely new and a little bit crazy.  Free Download Aktives Folienlager mit nachgiebigem Lagerträger und piezokeramischen Patchaktuatoren Deutsch | 2025 | ISBN: 3662700948 | 176 Pages | PDF (True) | 12 MB Folienlager sind Gleitlager mit einer nachgiebigen Innenkontur. Dies erlaubt die Kompensation der fliehkraft- und temperaturbedingten Wellenexpansion bei hohen Drehzahlen. Die vielen Reibkontakte zwischen den Folien erhöhen zudem die Lagerdämpfung. Mit aerodynamisch wirkenden Folienlagern ausgestattete Turbomaschinen können somit je nach Baugröße mit mehr als 100.000 U/min betrieben werden. Ein wesentlicher Faktor, der die Lebensdauer begrenzt, ist der Verschleiß bei jedem Start-Stop-Zyklus. Unglücklicherweise können Folienlager geometrisch entweder auf einen geringeren Verschleiß beim Anfahren oder eine größere Stabilität bei hohen Drehzahlen optimiert werden. In dem hier vorliegenden Buch wird daher der Ansatz eines aktiv schaltbaren Folienlagers vorgestellt, bei welchem das Lagerspiel und die geometrische Vorspannung (Preload) je nach Betriebszustand eingestellt werden können. Anhand theoretischer Überlegungen und experimenteller Beobachtungen zeigt sich eine grundsätzliche Eignung der im aktiven Lager angestrebten Schaltformen. So ist trotz signifikanter Einflüsse von Fertigungs- und Montageabweichungen eine Verbesserung des Anfahrverhaltens bzw. ein stabiler Betrieb bei hohen Drehzahlen sichtbar. Die Integration der aktiven Komponente, bestehend aus den piezokeramischen Patchaktuatoren und einem geometrisch an eine dreiflächige Lagerbuchse angelehnten Lagerträger, verändern das Betriebsverhalten gegenüber der passiven Prototypen dabei aber erheblich. So verringert sich neben der Lagersteifigkeit auch die Lagerdämpfung. Zudem genügen moderate Lasten und fertigungsbedingte Eigenspannungen, um die aktive Verformung des Lagerträgers zu blockieren. Theoretische Modelle zeigen, dass eine Versteifung der aktiven Komponente durchaus zielführend ist. Eine praktische Umsetzung ist hingegen aufgrund fehlender Aktuatorwerkstoffe aktuell noch nicht möglich.  Free Download Ageing and Long-term Care: National Policies in the Asia-Pacific By David R. Phillips (editor); Alfred C. M. Chan (editor) 2002 | 254 Pages | ISBN: 9812307168 | PDF | 1 MB The case studies in this book focus on the emergence, extent and nature of national policies on ageing and associated strategies to address long-term care needs. Key opportunities for and constraints on policy are identified in this first round of regional studies, written by prominent researchers in Hong Kong, Korea, Malaysia, Singapore and Thailand, who are partners in the Ageing Research Network of the Asian Development Research Forum. The case-studies are set in the context of regional and international plans of action on ageing and the deliberations of the Second World Assembly on Ageing held in 2002.  Free Download Advances in Understanding Soil Degradation by Elmira Saljnikov English | EPUB | 2022 | 789 Pages | ISBN : 303085681X | 207.2 MB  Free Download Advances in Mathematics: Theory, Methods & Applications by Akshay Kumar English | 2025 | ISBN: 8770046697 | 217 pages | True EPUB | 8.41 MB  Free Download Advances in Green Energy Technologies: Proceedings of ICGEST 2023, Volume 2 English | 2025 | ISBN: 9819608600 | 402 Pages | PDF (True) | 27 MB The book constitutes proceedings of the International Conference on Green Energy and Sustainable Technology, ICGEST 2023. The book covers research in energy management, planning the operation of renewable energy systems, distributed generation and energy management, economics/ electricity market and policy/ regulatory aspects, data analytics & AI applications in smart grid. This book contains research papers from academicians, researchers as well as students. This book is a valuable resource for students, academics, and practitioners in the industry working on energy areas. |
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