83 research outputs found
Electromagnetics, Volume 1
No full textElectromagnetics, volume 1 by Steven W. Ellingson is a 225-page, peer-reviewed open educational resource intended for electrical engineering students in the third year of a bachelor of science degree program. It is intended as a primary textbook for a one-semester first course in undergraduate engineering electromagnetics. The book employs the “transmission lines first” approach in which transmission lines are introduced using a lumped-element equivalent circuit model for a differential length of transmission line, leading to one-dimensional wave equations for voltage and current.
Note: Electromagnetics, volume 2 (2020) is now available at https://doi.org/10.21061/electromagnetics-vol-2.
Suggested citation
Ellingson, Steven W. (2018) Electromagnetics, Vol. 1. Blacksburg, VA: VT Publishing. https://doi.org/10.21061/electromagnetics-vol-1 CC BY-SA 4.0
Three formats of this book are available:
- Print (ISBN 9780997920185) Available from Amazon.com
- PDF (ISBN 9780997920192)
- LaTeX source files
Report adoption of this book here. If you are a professor reviewing, adopting, or adapting this textbook please help us understand your use by completing this form.
Additional resources
- Problem sets and the corresponding solution manual.
- Slides of figures used in and created for the book.
- Errata for Volume 1
- Community portal for the Electromagnetics series
- Faculty listserv for the Electromagnetics series
- Submit feedback and suggestions
- Independent Reviews
Table of contents
Chapter 1: Preliminary Concepts
Chapter 2: Electric and Magnetic Fields
Chapter 3: Transmission Lines
Chapter 4: Vector Analysis
Chapter 5: Electrostatics
Chapter 6: Steady Current and Conductivity
Chapter 7: Magnetostatics
Chapter 8: Time-Varying Fields
Chapter 9: Plane Waves in Lossless Media
Appendixes
A. Constitutive Parameters of Some Common Materials
B. Mathematical Formulas
C. Physical Constants
The Open Electromagnetics Project
Led by Steven W. Ellingson at Virginia Tech, the goal of the Open Electromagnetics Project is to create no-cost openly-licensed content for courses in engineering electromagnetics. The project is motivated by two things: lowering learning material costs for students and giving faculty the freedom to adopt, modify, and improve their educational resources.
Books in this series
Electromagnetics, Volume 1 https://doi.org/10.21061/electromagnetics-vol-1
Electromagnetics, Volume 2 https://doi.org/10.21061/electromagnetics-vol-2
To express your interest in a book or this series, please visit http://bit.ly/vtpublishing-updates
This book improves on Electromagnetics Volume 1 (beta) with the investment of field testing, copyediting, and technical review. Changes include correction of errors identified in the beta version errata and many minor improvements, addition of an index, addition of a separate manual of examples and solutions, and LaTeX source files for the book.
About the author
Steven W. Ellingson ([email protected]) is an Associate Professor at Virginia Tech in Blacksburg, Virginia in the United States. He received PhD and MS degrees in Electrical Engineering from the Ohio State University and a BS in Electrical & Computer Engineering from Clarkson University. He was employed by the US Army, Booz-Allen & Hamilton, Raytheon, and the Ohio State University ElectroScience Laboratory before joining the faculty of Virginia Tech, where he teaches courses in electromagnetics, radio frequency systems, wireless communications, and signal processing. His research includes topics in wireless communications, radio science, and radio frequency instrumentation. Professor Ellingson serves as a consultant to industry and government and is the author of Radio Systems Engineering (Cambridge University Press, 2016).
Publication of this book was made possible in part by the Open Education Faculty Initiative Grant program at the University Libraries at Virginia Tech.
http://guides.lib.vt.edu/oer/grants
Cover design: Robert Browder
Cover image: (c) Michelle Yost. Total Internal Reflection (modified by Robert Browder) is licensed with a Creative Commons Attribution-ShareAlike 2.0 license</a
Electromagnetics, Volume 2
No full textElectromagnetics, volume 2 by Steven W. Ellingson is a 216-page peer-reviewed open textbook designed especially for electrical engineering students in the third year of a bachelor of science degree program. It is intended as the primary textbook for the second semester of a two-semester undergraduate engineering electromagnetics sequence. The book addresses magnetic force and the Biot-Savart law; general and lossy media; parallel plate and rectangular waveguides; parallel wire, microstrip, and coaxial transmission lines; AC current flow and skin depth; reflection and transmission at planar boundaries; fields in parallel plate, parallel wire, and microstrip transmission lines; optical fiber; and radiation and antennas.
Review or adopt this book
If you are an instructor reviewing, adopting, or adapting this textbook please help us understand your use by completing this form.
Additional resources
- Problem sets and the corresponding solution manuals
- Slides of figures used in and created for the book
- LaTeX sourcefiles
- Screen-reader friendly version
- Errata for Volume 2
- Collaborator portal for the Electromagnetics series
- Faculty listserv for the Electromagnetics series
- Submit feedback and suggestions
Three formats of this book are available
- Print (ISBN 9781949373912) Available from Amazon.com
- PDF (ISBN 9781949373929)
- LaTeX source files
Table of contents
Chapter 1: Preliminary Concepts
Chapter 2: Magnetostatics Redux
Chapter 3: Wave Propagation in General Media
Chapter 4: Current Flow in Imperfect Conductors
Chapter 5: Wave Reflection and Transmission
Chapter 6: Waveguides
Chapter 7: Transmission Lines Redux
Chapter 8: Optical Fiber
Chapter 9: Radiation
Chapter 10: Antennas
Appendix A: Constitutive Parameters of Some Common Materials
Appendix B: Mathematical Formulas
Appendix C: Physical Constants
The Open Electromagnetics Project
Led by Steven W. Ellingson at Virginia Tech, the goal of the Open Electromagnetics Project is to create no-cost openly-licensed content for courses in engineering electromagnetics. The project is motivated by two things: lowering learning material costs for students and giving faculty the freedom to adopt, modify, and improve their educational resources.
Books in this series
Electromagnetics, Volume 1 https://doi.org/10.21061/electromagnetics-vol-1
Electromagnetics, Volume 2 https://doi.org/10.21061/electromagnetics-vol-2
To express your interest in a book or this series, please visit http://bit.ly/vtpublishing-updates
Suggested citation
Ellingson, Steven W. (2020) Electromagnetics, Vol. 2. Blacksburg, VA: Virginia Tech Publishing. https://doi.org/10.21061/electromagnetics-vol-2 CC BY-SA 4.0
About the author
Steven W. Ellingson ([email protected]) is an Associate Professor at Virginia Tech in Blacksburg, Virginia in the United States. He received PhD and MS degrees in Electrical Engineering from the Ohio State University and a BS in Electrical & Computer Engineering from Clarkson University. He was employed by the US Army, Booz-Allen & Hamilton, Raytheon, and the Ohio State University ElectroScience Laboratory before joining the faculty of Virginia Tech, where he teaches courses in electromagnetics, radio frequency systems, wireless communications, and signal processing. His research includes topics in wireless communications, radio science, and radio frequency instrumentation. Professor Ellingson serves as a consultant to industry and government and is the author of Radio Systems Engineering (Cambridge University Press, 2016).
Publication of this book was made possible in part by the Open Education Faculty Initiative Grant program at the University Libraries at Virginia Tech.
http://guides.lib.vt.edu/oer/grants
Cover design: Robert Browder
Cover image: (c) Michelle Yost. Total Internal Reflection (modified by Robert Browder) is licensed with a Creative Commons Attribution-ShareAlike 2.0 license</a
Engaging Crystallization in Qualitative Research: An Introduction
No full textEngaging Crystallization in Qualitative Research, the first how to book to both explain and demonstrate crystallization methodology, offers a framework for blending grounded theory and other social scientific analyses with creative representations of data, such as narratives, poetry, and film. Author Laura L. Ellingson explores relevant epistemological questions that arise when crossing methodological boundaries, provides detailed steps for design and planning, offers guidelines for improving both social scientific and creative/artistic writing, and suggests strategies for targeting publication outlets for multigenre representations.https://scholarcommons.scu.edu/faculty_books/1337/thumbnail.jp
Navigating Religious Identity and Diversity Among Gen Z in a Post-Pandemic World
No full textThe future of the religion lies with young people, whose lives are now riddled with uncertainty due to the COVID-19 pandemic. In this presentation, Dr. Josh Packard will draw from Springtide Research Institute’s annual State of Religion & Young People study to explain the spiritual lives of Gen Z and how we need to re-think everything when it comes to how we engage the most diverse generation in history. Rev. Neil Ellingson will moderate the Q & A period.
Dr. Josh Packard is Executive Director of Springtide Research Institute, which maintains the largest dataset on young people and their spirituality in the U.S. Josh has a doctorate in sociology from Vanderbilt and he’s the author of several books including Meaning Making: 8 Values that Drive America’s Newest Generations and Church Refugees: Why People are Done with Church but Not their Faith. Josh is a sought-after speaker and author and has been featured in the Wall Street Journal, Washington Post, CBS, USA Today, and more.
Pastor Neil Ellingson is Associate Chaplain in Campus Ministry at the University of St. Thomas. An ordained minister in the United Church of Christ, Ellingson holds a B.A. from Harvard University and a Master of Divinity degree from the University of Chicago Divinity School. He founded Root and Branch, a “dinner church” in Chicago, which continues to flourish.
Sponsored and organized by the Jay Phillips Center for Interreligious Studies in collaboration with the Department of Theology, Campus Ministry, Student Diversity & Inclusion Services, and the Office of Human Resources at the University of St. Thomas (Minnesota, USA) with generous support from the Jay and Rose Phillips Family Foundation of Minnesota
Electromagnetics Volume 1 (beta)
No full textPLEASE NOTE: This item has been superceded by a new version. Electromagnetics Volume 1 (Aug. 2018), which is freely available electronically.
Electromagnetics Volume 1 (BETA) (CC BY-SA 4.0) by Steven W. Ellingson is a 224-page, peer-reviewed, open educational resource intended to serve as a primary textbook for a one-semester first course in undergraduate engineering electromagnetics, and includes: electric and magnetic fields; electromagnetic properties of materials; electromagnetic waves; and devices that operate according to associated electromagnetic principles including resistors, capacitors, inductors, transformers, generators, and transmission lines. This book employs the "transmission lines first" approach, in which transmission lines are introduced using a lumped-element equivalent circuit model for a differential length of transmission line, leading to one-dimensional wave equations for voltage and current. This is intended for electrical engineering students in the third year of a bachelor of science degree program.
Print copies of this book are available on Amazon.com (ISBN:978-0997920123).
About this beta version
The beta version of Volume 1 is being field tested in a Spring 2018 course. It will be updated and re-released at this site in VTechWorks in Summer 2018. The following will also be added: index (within the book); problem sets, solution manual, and LaTeX source code (in VTechWorks).
Use, sharing, contributions to, and customization of this book or portions of this book or figures are an inherent part of the intent of the way this book has been published.
Please let us alert you of changes and developments. Telling us that you are using, hosting, or adapting Electromagnetics allows us to update you regarding collaborative development opportunities, errata, new volumes and editions, supplements and ancillaries, and newly issued print versions. Tell us at: http://bit.ly/vtpublishing-updates
Current errata for this volume can be found at:
http://www.faculty.ece.vt.edu/swe/oem/Vol1Beta_errata.txt
Share feedback & suggestions
1. Submit private or anonymous suggestions or feedback to the editor / author at: http://bit.ly/electromagnetics-suggestion
2. Share suggestions by annotating on the document using Hypothes.is https://web.hypothes.is View the guide for using Hypothesis to make comments http://bit.ly/userfeedbackguide
3. Submit additional suggestions via email to: [email protected]
Table of contents
Chapter 1: Preliminary Concepts
Chapter 2: Electric and Magnetic Fields
Chapter 3: Transmission Lines 29
Chapter 4: Vector Analysis
Chapter 5: Electrostatics
Chapter 6: Steady Current and Conductivity
Chapter 7: Magnetostatics
Chapter 8: Time-Varying Fields
Chapter 9: Plane Wave Propagation in Lossless Media
Appendix A: Constitutive Parameters of Some Common Materials
Appendix B: Mathematical Formulas
Appendix C: Physical Constants
The open Electromagnetics project at Virginia Tech
This textbook is part of the Open Electromagnetics Project led by Steven W. Ellingson at Virginia Tech. The goal of the project is to create no-cost openly-licensed content for courses in undergraduate engineering electromagnetics. The project is motivated by two things: lowering learning material costs for students and giving faculty the freedom to adopt, modify, and improve their educational resources.
Cover design: Robert Browder
Cover image: (c) Michelle Yost. Total Internal Reflection (modified by Robert Browder) is licensed with a Creative Commons Attribution-ShareAlike 2.0 license
About the author
Steven W. Ellingson ([email protected]) is an Associate Professor at Virginia Tech in Blacksburg, Virginia in the United States. He received PhD and MS degrees in Electrical Engineering from the Ohio State University and a BS in Electrical & Computer Engineering from Clarkson University. He was employed by the US Army, Booz-Allen & Hamilton, Raytheon, and the Ohio State University ElectroScience Laboratory before joining the faculty of Virginia Tech, where he teaches courses in electromagnetics, radio frequency systems, wireless communications, and signal processing. His research includes topics in wireless communications, radio science, and radio frequency instrumentation. Professor Ellingson serves as a consultant to industry and government and is the author of Radio Systems Engineering (Cambridge University Press, 2016).
Suggested citation
Ellingson, Steven W. (2018) Electromagnetics, Vol. 1 (Beta). Blacksburg, VA: VT Publishing. https://doi.org/10.7294/W4WQ01ZM Licensed with CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0
Publication of this book was made possible in part by the Virginia Tech University Libraries’ Open Education Faculty Initiative Grant program:
http://guides.lib.vt.edu/oer/grants</a
Classification of protein-ligand binding using their structural dispersion
No full textIt is known that a protein's biological function is in some way related to its physical structure. Many researchers have studied this relationship both for the entire backbone structures of proteins as well as their binding sites, which are where binding activity occurs. However, despite this research, it remains an open challenge to predict a proteins function from its structure. The main purpose of this research is to gain a better understanding of how structure relates to binding activity and to classify proteins according to function via structural information.
We approach the problem by first calculating the distances of each atom to the three principal axes. Then, we construct the covariance matrix for these distances for each binding site, which is named as Covariances of Distances to Pricipal Axis (CDPA) to serve as our data objects. To apply this methodology, we used the dataset compiled by Kahraman et al. (2007) and the extended Kahraman dataset that was used in Hoffmann et al (2010). Then, we performed classification on these matrices using a variety of techniques, including nearest mean. We apply this general approach to different types of distance, namely the Euclidean, Log-Euclidean, Cholesky, Square-Root, and Canonical distances. Finally, we compared the performance of the model-based technique using the CDPA with different distances to the alignment-based techniques arising from Ellingson and Zhang (2012) and Hoffmann et al. (2010).Embargo status: Restricted until 09/2022. To request the author grant access, click on the PDF link to the left
Radio Systems Engineering, Revised First Edition
No full textUsing a systems framework, this textbook provides a clear and comprehensive introduction to the performance, analysis, and design of radio systems for students and practicing engineers. Presented within a consistent framework, the first part of the book describes the fundamentals of the subject: propagation, noise, antennas, and modulation. The analysis and design of radios including RF circuit design and signal processing is covered in the second half of the book.
Key features
- Numerous examples within the text involve realistic analysis and design activities, and emphasize how practical experiences may differ from theory or taught procedures.
- RF circuit design and analysis is presented with minimal involvement of Smith charts, enabling students to more readily grasp the fundamentals.
- Both traditional and software-defined/direct sampling technology are described with pros and cons of each strategy explained.
- 517 pages. Licensed CC BY NC 4.0.
"This textbook gives engineering students a complete overview of radio systems and provides practicing wireless engineers with a convenient comprehensive reference."
Patrick Roblin, Ohio State University
Radio Systems Engineering, Revised First Edition was previously published by Cambridge University Press (2016) ISBN 9781107068285. This version is © Steven W. Ellingson and has been lightly updated to correct known errata, minor issues with text and figures, and to present examples in color highlight boxes and some figures in color. It is made freely available and under a Creative Commons Attribution NonCommercial International License (CC BY NC 4.0).
Are you reviewing or adopting this book for a course?
Please help us understand your use by filling out this form.
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How to access the book
The main landing page for this book is <a href="https://doi.org/10.21061/radiosystemsengineering-revised1st
">https://doi.org/10.21061/radiosystemsengineering-revised1st.
The open textbook is freely available online in multiple formats including PDF and HTML [forthcoming].
A paperback print version (in color) is available for order here.
ISBNs
ISBN (PDF): 978-1-957213-76-7
ISBN (HTML): 978-1-957213-77-4 (accessible version forthcoming)
ISBN (print): 978-1-957213-75-0
Table of contents
Chapter 1: Introduction
Chapter 2: Antenna Fundamentals
Chapter 3: Propagation
Chapter 4: Noise
Chapter 5: Analog Modulation
Chapter 6: Digital Modulation
Chapter 7: Radio Link Analysis
Chapter 8: Two-Port Concepts
Chapter 9: Impedance Matching
Chapter 10: Amplifiers
Chapter 11: Linearity, Multistage Analysis, and Dynamic Range
Chapter 12: Antenna Integration
Chapter 13: Analog Filters & Multiplexers
Chapter 14: Frequency and Quadrature Conversion in the Analog Domain
Chapter 15: Receivers
Chapter 16: Frequency Synthesis
Chapter 17: Transmitters
Chapter 18: Digital Implementation of Radio Functions
Appendix A: Empirical Modeling of Mean Path Loss
Appendix B: Characteristics of Some Common Radio Systems
About the author
Dr. Steven W. Ellingson
Steven W. Ellingson is an Associate Professor of Electrical & Computer Engineering at Virginia Tech. He received the Ph.D. degree in Electrical Engineering from the Ohio State University. He held senior engineering positions at Booz-Allen & Hamilton, Raytheon, and the Ohio State University ElectroScience Laboratory before joining the faculty of Virginia Tech. His research is in the areas of antennas and propagation, applied signal processing, and radio frequency instrumentation, with funding from the U.S. National Science Foundation, National Aeronautics and Space Administration, the Defense Advanced Research Projects Agency, and the commercial communications and aerospace industries. Dr. Ellingson serves as a consultant to industry and government on topics pertaining to radio frequency systems.
Project support
Support for editorial work, accessibility, publication assistance, and project management was provided by the Open Education Initiative of the University Libraries at Virginia Tech.
Suggested citation
Ellingson, Steven W. (2023). Radio Systems Engineering, Revised First Edition. Virginia Tech Publishing: Blacksburg. https://doi.org/10.21061/radiosystemsengineering-revised1st. Licensed with CC BY NC 4.0.
Errata and error reporting
View Errata
Report an Error
Accessibility
Virginia Tech is committed to making its publications accessible in accordance with the Americans with Disabilities Act of 1990.
Cover image: © Vallefrias. Used under license from Adobe.
Cover design: Kindred Gre
Chronicle (Paterson, NJ) Vol. 29, No. 50, Dec. 15, 1957
No full textLocal information pertaining to Paterson, N.J. and surrounding Passaic County. Issues may include events, government, business, political cartoons, engagement and marriage announcements, and birth announcements. This publication was also known as the Paterson Chronicle (1952) and the Paterson Sunday Chronicle (1951-1952)
Using crystallization to understand loneliness in later life: integrating social science and creative narratives in sensitive qualitative research
No full textThis article draws on crystallization, a qualitative framework developed by Laurel Richardson and Laura Ellingson, to show the potential of using sociological narratives and creative writing to better analyze and represent the lived experiences of loneliness among older people living in Australian care homes. Crystallization uses a multi-genre approach to study and present social phenomena. At its core is a concern for the ethics of representation, which is critical when engaging with vulnerable populations. We use two case studies from research on loneliness to illustrate an application of crystallization through different narrative types. To supplement our sociological narratives, we invited author Josephine Wilson to write creative narratives based on the case studies. Josephine was awarded the prestigious Miles Franklin Literary Award in 2017 for Extinctions, a novel exploring themes such as later life and loneliness. By contrasting the two approaches—sociological and creative narratives—we discuss the implications of crystallization for qualitative research.info:eu-repo/semantics/publishedVersio
Using crystallization to understand loneliness in later life: Integrating social science and creative narratives in sensitive qualitative research
No full textThis article draws on crystallization, a qualitative framework developed by Laurel Richardson and Laura Ellingson, to show the potential of using sociological narratives and creative writing to better analyze and represent the lived experiences of loneliness among older people living in Australian care homes. Crystallization uses a multi-genre approach to study and present social phenomena. At its core is a concern for the ethics of representation, which is critical when engaging with vulnerable populations. We use two case studies from research on loneliness to illustrate an application of crystallization through different narrative types. To supplement our sociological narratives, we invited author Josephine Wilson to write creative narratives based on the case studies. Josephine was awarded the prestigious Miles Franklin Literary Award in 2017 for Extinctions, a novel exploring themes such as later life and loneliness. By contrasting the two approaches—sociological and creative narratives—we discuss the implications of crystallization for qualitative research
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