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Author: En-Te Hwu Publisher: Edwin Hwu ISBN: Category : Science Languages : en Pages : 136
Book Description
A novel non-contact multiaxial astigmatic detection system (ADS) is designed and developed using the astigmatism as the measuring principle for the translational displacement, the angle, and their variations of a measured surface simultaneously. An optical pickup unit (OPU) of a commercial digital versatile disk (DVD) read only memory (ROM) drive can be used directly as an optical path mechanism in the above mentioned ADS, which can measure the translational and angular displacements accurately and simultaneously. The total linear detection range and the maximum measurement bandwidth of the ADS are 6 mm and 80MHz, respectively. The resolution of the translational displacement measurement is in sub-angstrom scale. For an operating frequency of 700 kHz, the noise floors of the translational and angular signals are below 0.8 pm/Hz1/2 and 0.4 mrad/ Hz1/2, respectively. The ADS can monitor the translational and two orthogonal angular displacements of a micro fabricated cantilever in atomic force microscopy (AFM). All the three, contact non-contact and tapping, modes can resolve the single atomic steps of the graphite surface, which indicates that atomic resolution is achievable with the ADS. The thermal noise spectra of the AFM probe can be clearly measured as well. Furthermore, the accuracy of scanning probe microscopy (SPM) depends not only on the measurement system itself, but also by the accuracy of the signal processing, which further depends on the physical and geometrical characteristics of the probe. The structure of the ADS is compact and stable. Besides the measurements through AFM probes, the ADS can be operated in profilometer mode. The CD surface and the CCD microlens are measured by this mode. The maximum scanning speed can reach up to 3.84×106 mm/s theoretically, almost one million times faster than that of a commercial SPM system. The ADS has a great potential for future development, the expansibility and the accuracy can evolve with the performance of future OPU. From the DVD OPU to higher resolution one, such as the OPU of the Blu-ray drive or high- definition (HD-DVD), can be integrated into the ADS as well. KEYWORDS: Astigmatism, ADS, Translational displacement, Angular displacement, SPM, AFM, Cantilever, Optical profilometer
Author: En-Te Hwu Publisher: Edwin Hwu ISBN: Category : Science Languages : en Pages : 136
Book Description
A novel non-contact multiaxial astigmatic detection system (ADS) is designed and developed using the astigmatism as the measuring principle for the translational displacement, the angle, and their variations of a measured surface simultaneously. An optical pickup unit (OPU) of a commercial digital versatile disk (DVD) read only memory (ROM) drive can be used directly as an optical path mechanism in the above mentioned ADS, which can measure the translational and angular displacements accurately and simultaneously. The total linear detection range and the maximum measurement bandwidth of the ADS are 6 mm and 80MHz, respectively. The resolution of the translational displacement measurement is in sub-angstrom scale. For an operating frequency of 700 kHz, the noise floors of the translational and angular signals are below 0.8 pm/Hz1/2 and 0.4 mrad/ Hz1/2, respectively. The ADS can monitor the translational and two orthogonal angular displacements of a micro fabricated cantilever in atomic force microscopy (AFM). All the three, contact non-contact and tapping, modes can resolve the single atomic steps of the graphite surface, which indicates that atomic resolution is achievable with the ADS. The thermal noise spectra of the AFM probe can be clearly measured as well. Furthermore, the accuracy of scanning probe microscopy (SPM) depends not only on the measurement system itself, but also by the accuracy of the signal processing, which further depends on the physical and geometrical characteristics of the probe. The structure of the ADS is compact and stable. Besides the measurements through AFM probes, the ADS can be operated in profilometer mode. The CD surface and the CCD microlens are measured by this mode. The maximum scanning speed can reach up to 3.84×106 mm/s theoretically, almost one million times faster than that of a commercial SPM system. The ADS has a great potential for future development, the expansibility and the accuracy can evolve with the performance of future OPU. From the DVD OPU to higher resolution one, such as the OPU of the Blu-ray drive or high- definition (HD-DVD), can be integrated into the ADS as well. KEYWORDS: Astigmatism, ADS, Translational displacement, Angular displacement, SPM, AFM, Cantilever, Optical profilometer
Author: Karl Johan Åström Publisher: Princeton University Press ISBN: 069121347X Category : Technology & Engineering Languages : en Pages :
Book Description
The essential introduction to the principles and applications of feedback systems—now fully revised and expanded This textbook covers the mathematics needed to model, analyze, and design feedback systems. Now more user-friendly than ever, this revised and expanded edition of Feedback Systems is a one-volume resource for students and researchers in mathematics and engineering. It has applications across a range of disciplines that utilize feedback in physical, biological, information, and economic systems. Karl Åström and Richard Murray use techniques from physics, computer science, and operations research to introduce control-oriented modeling. They begin with state space tools for analysis and design, including stability of solutions, Lyapunov functions, reachability, state feedback observability, and estimators. The matrix exponential plays a central role in the analysis of linear control systems, allowing a concise development of many of the key concepts for this class of models. Åström and Murray then develop and explain tools in the frequency domain, including transfer functions, Nyquist analysis, PID control, frequency domain design, and robustness. Features a new chapter on design principles and tools, illustrating the types of problems that can be solved using feedback Includes a new chapter on fundamental limits and new material on the Routh-Hurwitz criterion and root locus plots Provides exercises at the end of every chapter Comes with an electronic solutions manual An ideal textbook for undergraduate and graduate students Indispensable for researchers seeking a self-contained resource on control theory
Author: Horst Czichos Publisher: Springer Nature ISBN: 3030642100 Category : Science Languages : en Pages : 178
Book Description
This book gives a short presentation of the triad philosophy–physics–technology against the background of the common origin in ancient times. This is the first English edition of this book, previously published in German. The emergence of the book has been described in the foreword of the first German edition. This edition is updated and extended, whereby new physical research results and technological innovations were included: - The physics of space and time after the experimental detection of gravitational waves (Nobel Prize for Physics 2017). - The New International System of Units (SI) for Physics and Technology which is completely based on natural constants and entered into force on World Metrology Day, 20 May 2019. - Actual overview of basic technologies: Material, Energy, Information. - Technologies for the “Digital World” of information and communication. - Mechatronic and Cyber-physical systems for Industry 4.0. The significance of technology for the world in the 21st century is discussed in the final section of the book.
Author: Roland Wiesendanger Publisher: Cambridge University Press ISBN: 9780521428477 Category : Science Languages : en Pages : 664
Book Description
The investigation and manipulation of matter on the atomic scale have been revolutionised by scanning tunnelling microscopy and related scanning probe techniques. This book is the first to provide a clear and comprehensive introduction to this subject. Beginning with the theoretical background of scanning tunnelling microscopy, the design and instrumentation of practical STM and associated systems are described in detail, as are the applications of these techniques in fields such as condensed matter physics, chemistry, biology, and nanotechnology. Containing 350 illustrations, and over 1200 references, this unique book represents an ideal introduction to the subject for final-year undergraduates in physics or materials science. It will also be invaluable to graduate students and researchers in any branch of science where scanning probe techniques are used.
Author: Anant Agarwal Publisher: Elsevier ISBN: 008050681X Category : Technology & Engineering Languages : en Pages : 1009
Book Description
Unlike books currently on the market, this book attempts to satisfy two goals: combine circuits and electronics into a single, unified treatment, and establish a strong connection with the contemporary world of digital systems. It will introduce a new way of looking not only at the treatment of circuits, but also at the treatment of introductory coursework in engineering in general. Using the concept of ''abstraction,'' the book attempts to form a bridge between the world of physics and the world of large computer systems. In particular, it attempts to unify electrical engineering and computer science as the art of creating and exploiting successive abstractions to manage the complexity of building useful electrical systems. Computer systems are simply one type of electrical systems.+Balances circuits theory with practical digital electronics applications.+Illustrates concepts with real devices.+Supports the popular circuits and electronics course on the MIT OpenCourse Ware from which professionals worldwide study this new approach.+Written by two educators well known for their innovative teaching and research and their collaboration with industry.+Focuses on contemporary MOS technology.
Author: Marc J. Madou Publisher: CRC Press ISBN: 1482274663 Category : Technology & Engineering Languages : en Pages : 1983
Book Description
Now in its third edition, Fundamentals of Microfabrication and Nanotechnology continues to provide the most complete MEMS coverage available. Thoroughly revised and updated the new edition of this perennial bestseller has been expanded to three volumes, reflecting the substantial growth of this field. It includes a wealth of theoretical and practical information on nanotechnology and NEMS and offers background and comprehensive information on materials, processes, and manufacturing options. The first volume offers a rigorous theoretical treatment of micro- and nanosciences, and includes sections on solid-state physics, quantum mechanics, crystallography, and fluidics. The second volume presents a very large set of manufacturing techniques for micro- and nanofabrication and covers different forms of lithography, material removal processes, and additive technologies. The third volume focuses on manufacturing techniques and applications of Bio-MEMS and Bio-NEMS. Illustrated in color throughout, this seminal work is a cogent instructional text, providing classroom and self-learners with worked-out examples and end-of-chapter problems. The author characterizes and defines major research areas and illustrates them with examples pulled from the most recent literature and from his own work.
Author: Duane Knudson Publisher: Springer Science & Business Media ISBN: 1475752989 Category : Medical Languages : en Pages : 332
Book Description
Fundamentals of Biomechanics introduces the exciting world of how human movement is created and how it can be improved. Teachers, coaches and physical therapists all use biomechanics to help people improve movement and decrease the risk of injury. The book presents a comprehensive review of the major concepts of biomechanics and summarizes them in nine principles of biomechanics. Fundamentals of Biomechanics concludes by showing how these principles can be used by movement professionals to improve human movement. Specific case studies are presented in physical education, coaching, strength and conditioning, and sports medicine.
Author: Raymond Serway Publisher: Cengage Learning ISBN: 9781133953951 Category : Science Languages : en Pages : 1344
Book Description
As a market leader, PHYSICS FOR SCIENTISTS AND ENGINEERS is one of the most powerful brands in the physics market. While preserving concise language, state-of-the-art educational pedagogy, and top-notch worked examples, the Ninth Edition highlights the Analysis Model approach to problem-solving, including brand-new Analysis Model Tutorials, written by text co-author John Jewett, and available in Enhanced WebAssign. The Analysis Model approach lays out a standard set of situations that appear in most physics problems, and serves as a bridge to help students identify the correct fundamental principle--and then the equation--to utilize in solving that problem. The unified art program and the carefully thought out problem sets also enhance the thoughtful instruction for which Raymond A. Serway and John W. Jewett, Jr. earned their reputations. The Ninth Edition of PHYSICS FOR SCIENTISTS AND ENGINEERS continues to be accompanied by Enhanced WebAssign in the most integrated text-technology offering available today. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.
Author: En-Te Hwu
Author: En-Te Hwu
Author: Karl Johan Åström
Author: Horst Czichos
Author: Roland Wiesendanger
Author: Anant Agarwal
Author: 
Author: Marc J. Madou
Author: 
Author: Duane Knudson
Author: Raymond Serway