Download or read book Correction of Aberrations Past Present and Future written by and published by . This book was released on 2002 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of static rotationally symmetric electron lenses is limited by unavoidable chromatic and spherical aberrations. In 1936, Scherzer demonstrated that the integrands of the integral expressions for the coefficients of these aberrations can be written as a sum of positive quadratic terms. Hence these coefficients can never change sign. This important result is called the Scherzer theorem, the only theorem existing in electron optics. Employing variational methods, Tretner determined the field of magnetic and electrostatic round lenses, which yields the smallest spherical aberration coefficient for particular constraints [2]. Unfortunately, these coefficients are still too large for realistic boundaries to enable sub-Angstrom resolution at medium voltages of about 200 to 300 kV. Therefore, the only possibility to directly reach this limit is the correction of the troublesome aberrations. It was again Scherzer who showed different procedures for canceling these aberrations [3]. The most promising is the incorporation of a corrector consisting of multipole elements or of a tetrode mirror in the case of low voltages. Although the mirror is rotationally symmetric, a non-rotationally symmetric beam splitter is needed to separate the incident beam from the reflected beam.
Download or read book Handbook of Charged Particle Optics written by Jon Orloff and published by CRC Press. This book was released on 2017-12-19 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing proliferation of nanotechnologies, powerful imaging technologies are being developed to operate at the sub-nanometer scale. The newest edition of a bestseller, the Handbook of Charged Particle Optics, Second Edition provides essential background information for the design and operation of high resolution focused probe instruments. The book’s unique approach covers both the theoretical and practical knowledge of high resolution probe forming instruments. The second edition features new chapters on aberration correction and applications of gas phase field ionization sources. With the inclusion of additional references to past and present work in the field, this second edition offers perfectly calibrated coverage of the field’s cutting-edge technologies with added insight into how they work. Written by the leading research scientists, the second edition of the Handbook of Charged Particle Optics is a complete guide to understanding, designing, and using high resolution probe instrumentation.
Download or read book PRK written by Lucio Buratto and published by CRC Press. This book was released on 2024-06-01 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern laser vision correction has continually changed since its inception. The evolution of this procedure has been aided by broad technological advancements, increased surgical knowledge, and increased understanding of the cornea and its response to lasers. PRK: The Past, Present, and Future of Surface Ablation will provide a complete vision of the PRK laser correction techniques that have emerged and the technological advancements that have made them possible. The collaboration of Drs. Buratto, Slade, Serrao, and Lombardo, along with a team of international surgeons have produced a complete book specifically designed to assist clinician’s to improve the quality of their patient’s vision With over 85 color illustrations demonstrating the various procedures and concepts, the book will help ophthalmologists develop a more thorough understanding of PRK. PRK: The Past, Present, and Future of Surface Ablation is excellent for surgeons interested in learning the concepts, developing skills, and preparing for the actual laser procedure. This definitive resource couples both the authors' and 9 contributors' diverse experience and knowledge to produce a complete vision of PRK laser vision correction. PRK: The Past, Present, and Future of Surface Ablation will be the definitive resource necessary for all surgeons aspiring to improve their surgical results using the latest techniques available.
Download or read book Programme and The Book of Abstracts Twentieth Annual Conference YUCOMAT 2018 Herceg Novi September 3 7 2018 written by Dragan Uskoković and published by Materials Research Society of Serbia. This book was released on 2018-08-13 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aberration Corrected Analytical Transmission Electron Microscopy written by Rik Brydson and published by John Wiley & Sons. This book was released on 2011-08-02 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is concerned with the theory, background, and practical use of transmission electron microscopes with lens correctors that can correct the effects of spherical aberration. The book also covers a comparison with aberration correction in the TEM and applications of analytical aberration corrected STEM in materials science and biology. This book is essential for microscopists involved in nanoscale and materials microanalysis especially those using scanning transmission electron microscopy, and related analytical techniques such as electron diffraction x-ray spectrometry (EDXS) and electron energy loss spectroscopy (EELS).
Download or read book Marginality in Space Past Present and Future written by Heikki Jussila and published by Routledge. This book was released on 2019-01-15 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published in 1999, this book discusses the role that marginality has had in the past, has today and will have in the future. The Commission on Dynamics of Marginal and Critical Regions held its annual conference in Harare, Zimbabwe in July 1997. This volume represents a carefully selected, revised and reviewed selection of the papers presented at this conference. The articles reflect the various aspects of marginality currently existing in the world and it is the intention of the Commission to pursue research that would eventually result in a more coherent approach towards the issues of marginality in space. The articles in the book are grouped into three main parts. The first part discusses the role of theory and also methodological aspects and approaches towards the question of marginality. The second part gives a 'time-space' perspective by examining the past, present and future aspects of marginality. The third part is dedicated to empirical evidence about the changes in existing marginality and its possible future implementations. The conclusions of the book summarize the various and sometimes conflicting, aspects of marginality and its ’images’ both in space and in time.
Download or read book Zeolite Characterization and Catalysis written by Arthur W. Chester and published by Springer Science & Business Media. This book was released on 2009-10-03 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea for putting together a tutorial on zeolites came originally from my co-editor, Eric Derouane, about 5 years ago. I ?rst met Eric in the mid-1980s when he spent 2 years working for Mobil R&D at our then Corporate lab at Princeton, NJ. He was on the senior technical staff with projects in the synthesis and characterization of new materials. At that time, I managed a group at our Paulsboro lab that was responsible for catalyst characterization in support of our catalyst and process development efforts, and also had a substantial group working on new material synthesis. Hence, our interests overlapped considerably and we met regularly. After Eric moved back to Namur (initially), we maintained contact, and in the 1990s, we met a number of times in Europe on projects of joint interest. It was after I retired from ExxonMobil in 2002 that we began to discuss the tutorial concept seriously. Eric had (semi-)retired and lived on the Algarve, the southern coast of Portugal. In January 2003, my wife and I spent 3 weeks outside of Lagos, and I worked parts of most days with Eric on the proposed content of the book. We decided on a comprehensive approach that ultimately amounted to some 20+ chapters covering all of zeolite chemistry and catalysis and gave it the title Zeolite Chemistry and Catalysis: An integrated Approach and Tutorial.
Download or read book Enlightenment Aberrations written by David William Bates and published by Cornell University Press. This book was released on 2002 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Enlightenment Aberrations, David W. Bates shows that error was a complex, important, and by no means entirely negative concept in Enlightenment thought, one that had a decisive influence in revolutionary debates on political identity and national history. What can it mean to write a history of error? In Bates's view all philosophy, insofar as its project is the search for truth, begins in error. If truth is posited as a goal to be attained, not as a given of some kind, then error assumes a central role in the quest for truth. Going beyond both liberal celebrations and postmodern critiques of Enlightenment reason, Bates reveals just how crucial the problematic relation between human "wandering" and the mystery of truth was in eighteenth-century thought. The author draws on a wide range of Enlightenment thinkers, including Etienne Bonnot de Condillac, Jean d'Alembert, Marie-Jean-Antoine-Nicolas Caritat, Marquis de Condorcet, Jean-Jacques Rousseau, and Charles Bonnet, showing how they wrestled with the "risk and promise" of error. He then demonstrates how the concept of error and its dialectical relationship to truth played out in the political culture of the French Revolution, particularly in the Terror. In the final chapters, Bates looks at the post-revolutionary transformations of the Enlightenment discourse of error and its subsequent history in modern European thought.
Download or read book Aberration corrected Imaging In Transmission Electron Microscopy An Introduction 2nd Edition written by Rolf Erni and published by World Scientific Publishing Company. This book was released on 2015-03-23 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aberration-Corrected Imaging in Transmission Electron Microscopy provides an introduction to aberration-corrected atomic-resolution electron microscopy imaging in materials and physical sciences. It covers both the broad beam transmission mode (TEM; transmission electron microscopy) and the scanning transmission mode (STEM; scanning transmission electron microscopy). The book is structured in three parts. The first part introduces the basics of conventional atomic-resolution electron microscopy imaging in TEM and STEM modes. This part also describes limits of conventional electron microscopes and possible artefacts which are caused by the intrinsic lens aberrations that are unavoidable in such instruments. The second part introduces fundamental electron optical concepts and thus provides a brief introduction to electron optics. Based on the first and second parts of the book, the third part focuses on aberration correction; it describes the various aberrations in electron microscopy and introduces the concepts of spherical aberration correctors and advanced aberration correctors, including correctors for chromatic aberration. This part also provides guidelines on how to optimize the imaging conditions for atomic-resolution STEM and TEM imaging.This second edition has been completely revised and updated in order to incorporate the very recent technological and scientific achievements that have been realized since the first edition appeared in 2010.
Download or read book Liquid Cell Electron Microscopy written by Frances M. Ross and published by Cambridge University Press. This book was released on 2017 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2.6.2 Electrodes for Electrochemistry
Download or read book Advanced Transmission Electron Microscopy written by Jian Min Zuo and published by Springer. This book was released on 2016-10-26 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume expands and updates the coverage in the authors' popular 1992 book, Electron Microdiffraction. As the title implies, the focus of the book has changed from electron microdiffraction and convergent beam electron diffraction to all forms of advanced transmission electron microscopy. Special attention is given to electron diffraction and imaging, including high-resolution TEM and STEM imaging, and the application of these methods to crystals, their defects, and nanostructures. The authoritative text summarizes and develops most of the useful knowledge which has been gained over the years from the study of the multiple electron scattering problem, the recent development of aberration correctors and their applications to materials structure characterization, as well as the authors' extensive teaching experience in these areas. Advanced Transmission Electron Microscopy: Imaging and Diffraction in Nanoscience is ideal for use as an advanced undergraduate or graduate level text in support of course materials in Materials Science, Physics or Chemistry departments.
Download or read book The Optician and Scientific Instrument Maker written by and published by . This book was released on 1926 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Instrumentation and Techniques for Semiconductor Nanostructure Characterization written by Richard Haight and published by World Scientific. This book was released on 2012 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: As we delve more deeply into the physics and chemistry of functional materials and processes, we are inexorably driven to the nanoscale. And nowhere is the development of instrumentation and associated techniques more important to scientific progress than in the area of nanoscience. The dramatic expansion of efforts to peer into nanoscale materials and processes has made it critical to capture and summarize the cutting-edge instrumentation and techniques that have become indispensable for scientific investigation in this arena. This Handbook is a key resource developed for scientists, engineers and advanced graduate students in which eminent scientists present the forefront of instrumentation and techniques for the study of structural, optical and electronic properties of semiconductor nanostructures.
Download or read book Encyclopedia of Paleoclimatology and Ancient Environments written by Vivien Gornitz and published by Springer Science & Business Media. This book was released on 2008-10-31 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of Springer’s Major Reference Works, this book gives the reader a truly global perspective. It is the first major reference work in its field. Paleoclimate topics covered in the encyclopedia give the reader the capability to place the observations of recent global warming in the context of longer-term natural climate fluctuations. Significant elements of the encyclopedia include recent developments in paleoclimate modeling, paleo-ocean circulation, as well as the influence of geological processes and biological feedbacks on global climate change. The encyclopedia gives the reader an entry point into the literature on these and many other groundbreaking topics.
Download or read book So Great a Salvation written by Gene L. Green and published by Wm. B. Eerdmans Publishing. This book was released on 2017 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Though the global center of Christianity has been shifting south and east for decades, very few biblical and theological resources have dealt with the seismic changes afoot. The Majority World Theology series seeks to remedy that lack by gathering well-regarded Christian thinkers from around the world to discuss the significance of Christian teaching in their respective contexts. This textbook series introduces students and scholars to these enlightening developments from the Majority World. In So Great a Salvation nine scholars from the global church reflect deeply on soteriology in the Majority World. For many Christians outside Europe and North America, the doctrine of salvation is not a mere theological construct but, rather, a matter of life and death. Taking African, Asian, Latin American, and First Nations cultural contexts into account, this book allows readers to see God's creative deliverance in a fresh light. CONTRIBUTORS: Milton Acosta (Colombian) Ray Aldred (Cree) Sung Wook Chung (Korean American) Rosinah Mmannana Gabaitse (Botswanan) Elaine W. F. Goh (Malaysian Chinese) Emily J. Choge Kerama (Kenyan) Jules A. Mart nez-Olivieri (Puerto Rican) Daniel J. Treier (American) K. K. Yeo (Chinese American)
Download or read book Climate of the Past Present and Future written by Javier Vinós and published by Critical Science Press. This book was released on 2022-09-20 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an unorthodox ground-breaking scientific study on natural climate change and its contribution to ongoing multi-centennial global warming. The book critically reviews the effect of the following on climate: - Milankovitch cycles - abrupt glacial (Dansgaard-Oeschger) events - Holocene climate variability - the 1500-year cycle - solar activity - volcanic eruptions - greenhouse gases - energy transport Applying the scientific method to available evidence reveals that some of these phenomena are profoundly misunderstood by most researchers. Milankovitch cycles are tied to orbital obliquity, not to orbital precessional summer insolation; glacial megatides might have triggered abrupt Dansgaard-Oeschger events; and tides are likely responsible for the related 1500-year climate cycle. Climate change affects volcanic eruptions more than the opposite; and secular variations in solar activity are more important to climate change during the Holocene than greenhouse gases. In this book, we see how important natural climate change has been on human societies of the past. It also produces new climate projections for the 21st century and when the next glaciation could happen. What emerges from this study of natural climate change is a central theme: Variations in the transport of energy from the tropics to the poles have been neglected as a cause of climate change, and solar activity variations affect climate by modulating this transport. The author tells us: –Transporting more energy from a greenhouse gas-rich region, the tropics, to a greenhouse gas-poor region, the poles, increases the amount of energy lost at the top of the atmosphere. The effect resembles a reduction in the greenhouse gas content.– The book presents the Winter-Gatekeeper Hypothesis on how variations in solar activity regulate Earth's energy transport and in so doing affect atmospheric circulation, the rotation of the planet, and the El Niño/Southern Oscillation. This book is oriented toward students and academics in the climate sciences and climate anthropology and should also appeal to readers interested in the science of natural climate change. The repercussions of Climate of the Past, Present and Future are far reaching. By uncovering a strong natural climate change component, it provides a novel view of anthropogenic climate change, fossil energy use, and our future climate; a view quite different from the IPCC's gloomy projections.
Download or read book Springer Handbook of Microscopy written by Peter W. Hawkes and published by Springer Nature. This book was released on 2019-11-02 with total page 1561 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features reviews by leading experts on the methods and applications of modern forms of microscopy. The recent awards of Nobel Prizes awarded for super-resolution optical microscopy and cryo-electron microscopy have demonstrated the rich scientific opportunities for research in novel microscopies. Earlier Nobel Prizes for electron microscopy (the instrument itself and applications to biology), scanning probe microscopy and holography are a reminder of the central role of microscopy in modern science, from the study of nanostructures in materials science, physics and chemistry to structural biology. Separate chapters are devoted to confocal, fluorescent and related novel optical microscopies, coherent diffractive imaging, scanning probe microscopy, transmission electron microscopy in all its modes from aberration corrected and analytical to in-situ and time-resolved, low energy electron microscopy, photoelectron microscopy, cryo-electron microscopy in biology, and also ion microscopy. In addition to serving as an essential reference for researchers and teachers in the fields such as materials science, condensed matter physics, solid-state chemistry, structural biology and the molecular sciences generally, the Springer Handbook of Microscopy is a unified, coherent and pedagogically attractive text for advanced students who need an authoritative yet accessible guide to the science and practice of microscopy.
