Btl Innovation List
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
Harry Nyquist 1889-1976
Nyquist and His Seminal Papers Harry Nyquist 1889-1976 Karl Johan Åström A Gifted Scientist and Department of Mechanical Engineering Engineer University of California Santa Barbara Johnson-Nyquist noise The Nyquist frequency Nyquist’s Stability Criterion ASME Nyquist Lecture 2005 ASME Nyquist Lecture 2005 Introduction 1.Introduction 2.A Remarkable Career • Thank you for honoring Nyquist • Thank you for inviting me to give this lecture 3.Communications • Nyquist was awarded the Rufus Oldenburger 4.Johnson-Nyquist Noise medal in 1975 5.Stability Theory • The person and his contributions • What we can learn 6.Summary ASME Nyquist Lecture 2005 ASME Nyquist Lecture 2005 A Remarkable Career Born in Nilsby Sweden February 7 1889 6 years in school Emigrated to USA 1907 Farmhand Teachers College University of North Dakota PhD Physics Yale University 1917 AT&T Bell Labs 1917-1954 Consultant 1954-1965 ASME Nyquist Lecture 2005 ASME Nyquist Lecture 2005 Becoming a Teacher is my Dream Rubrik • Emigrated 1907 • Southern Minnesota Normal College, Austin Active as in teaching • Back to SMNC • Exam 1911 valedictarian • High School Teacher 1912 ASME Nyquist Lecture 2005 ASME Nyquist Lecture 2005 A Dream Comes True Academia Pulls University of North Dakota BS EE 1914 MS EE 1915 Very active in student organizations met Johnson Yale University PhD Physics 1917. Thesis topic: On the Stark effect in Helium and Neon. Largely experimental. ASME Nyquist Lecture 2005 ASME Nyquist Lecture 2005 The ATT Early Fax A Career in AT&T Bell commersial from 1925 • 1917 AT&T Engineering Department • 1919 Department of Development and Research • 1935 Bell Labs • World War II • 1952 Assistant director fo Systems Studies • 1954 Retired • 1954-1962 Consulting ASME Nyquist Lecture 2005 ASME Nyquist Lecture 2005 An Unusual Research Lab In His Right Environment Control the telephone monoply • Nyquist thrived, challenging problems, clever Key technologies collegues, interesting. -
UNIVERSITY of CALIFORNIA RIVERSIDE Fabrication And
UNIVERSITY OF CALIFORNIA RIVERSIDE Fabrication and Characterization of Organic/Inorganic Photovoltaic Devices A Dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Electrical Engineering by Ali Bilge Guvenc March 2012 Dissertation Committee: Dr. Mihrimah Ozkan, Chairperson Dr. Cengiz S. Ozkan Dr. Kambiz Vafai Copyright by Ali Bilge Guvenc 2012 The Dissertation of Ali Bilge Guvenc is approved: ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ Committee Chairperson University of California, Riverside To my beloved wife and daughters iv ABSTRACT OF THE DISSERTATION Fabrication and Characterization of Organic/Inorganic Photovoltaic Devices by Ali Bilge Guvenc Doctor of Philosophy, Graduate Program in Electrical Engineering University of California, Riverside, March 2012 Prof. Mihrimah Ozkan, Chairperson Energy is central to achieving the goals of sustainable development and will continue to be a primary engine for economic development. In fact, access to and consumption of energy is highly effective on the quality of life. The consumption of all energy sources have been increasing and the projections show that this will continue in the future. Unfortunately, conventional energy sources are limited and they are about to run out. Solar energy is one of the major alternative energy sources to meet the increasing demand. Photovoltaic devices are one way to harvest energy from sun and as a branch of photovoltaic devices organic bulk heterojunction photovoltaic devices have recently drawn tremendous attention because of their technological advantages for actualization of large-area and cost effective fabrication. The research in this dissertation focuses on both the mathematical modelling for better and more efficient characterization and the improvement of device power conversion efficiency. -
Harvey Fletcher and Henry Eyring: Men of Faith and Science
Edward L. Kimball Harvey Fletcher and Henry Eyring: Men of Faith and Science The year 1981 saw the deaths of Harvey Fletcher and Henry Eyring, men of great religious faith whose superb professional achievements placed them in the first ranks of the nation's scientists. (See Steven H. Heath's "The Reconcilia- tion of Faith and Science: Henry Eyring's Achievement," this issue.) Both could be said to have had simple religious faith — not because they were un- complicated people incapable of subtlety, but because their religious character was early and firmly grounded in a few fundamentals. This freed them from a life of continuing doubt and struggle. The two men, seventeen years apart in age, had a kind of family relation- ship. Henry Eyring's uncle Carl Eyring (after whom BYU's Eyring Science Center is named) married Fern Chipman; Harvey Fletcher married her sister Lorena. After their spouses died, Harvey Fletcher and Fern Chipman Eyring married. As a result, Henry Eyring called him Uncle Harvey. But that was not unique. Nearly everyone else did, too. Harvey Fletcher was born in 1884 in a little frame house in Provo, Utah. Among his memories are attending the dedication of the Salt Lake Temple and shaking President Wilford Woodruff's hand. As a young boy, he recited a short poem at a program in the Provo Tabernacle; and after he finished, Karl G. Maeser, principal of the Brigham Young Academy, stopped him before he could resume his seat, put his hand on Harvey's head, and said, "I want this congregation to know that this little boy will one day be a great man." Instead of being pleased, Harvey was bothered; he perceived it as a prediction of politi- cal leadership, which he did not want. -
Optimization and Design of Photovoltaic Micro-Inverter
University of Central Florida STARS Electronic Theses and Dissertations, 2004-2019 2013 Optimization And Design Of Photovoltaic Micro-inverter Qian Zhang University of Central Florida Part of the Electrical and Electronics Commons Find similar works at: https://stars.library.ucf.edu/etd University of Central Florida Libraries http://library.ucf.edu This Doctoral Dissertation (Open Access) is brought to you for free and open access by STARS. It has been accepted for inclusion in Electronic Theses and Dissertations, 2004-2019 by an authorized administrator of STARS. For more information, please contact [email protected]. STARS Citation Zhang, Qian, "Optimization And Design Of Photovoltaic Micro-inverter" (2013). Electronic Theses and Dissertations, 2004-2019. 2811. https://stars.library.ucf.edu/etd/2811 OPTIMIZATION AND DESIGN OF PHOTOVOLTAIC MICRO-INVERTER by QIAN ZHANG B.S. Huazhong University of Science and Technology, 2006 M.S. Wuhan University, 2008 A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Electrical Engineering and Computer Science in the College of Engineering and Computer Science at the University of Central Florida Orlando, Florida Summer Term 2013 Major Professor: John Shen & Issa Batarseh ©2013 Qian Zhang ii ABSTRACT To relieve energy shortage and environmental pollution issues, renewable energy, especially PV energy has developed rapidly in the last decade. The micro-inverter systems, with advantages in dedicated PV power harvest, flexible system size, simple installation, and enhanced safety characteristics are the future development trend of the PV power generation systems. The double-stage structure which can realize high efficiency with nice regulated sinusoidal waveforms is the mainstream for the micro-inverter. -
AWAR Volume 24.Indb
THE AWA REVIEW Volume 24 2011 Published by THE ANTIQUE WIRELESS ASSOCIATION PO Box 421, Bloomfi eld, NY 14469-0421 http://www.antiquewireless.org i Devoted to research and documentation of the history of wireless communications. Antique Wireless Association P.O. Box 421 Bloomfi eld, New York 14469-0421 Founded 1952, Chartered as a non-profi t corporation by the State of New York. http://www.antiquewireless.org THE A.W.A. REVIEW EDITOR Robert P. Murray, Ph.D. Vancouver, BC, Canada ASSOCIATE EDITORS Erich Brueschke, BSEE, MD, KC9ACE David Bart, BA, MBA, KB9YPD FORMER EDITORS Robert M. Morris W2LV, (silent key) William B. Fizette, Ph.D., W2GDB Ludwell A. Sibley, KB2EVN Thomas B. Perera, Ph.D., W1TP Brian C. Belanger, Ph.D. OFFICERS OF THE ANTIQUE WIRELESS ASSOCIATION DIRECTOR: Tom Peterson, Jr. DEPUTY DIRECTOR: Robert Hobday, N2EVG SECRETARY: Dr. William Hopkins, AA2YV TREASURER: Stan Avery, WM3D AWA MUSEUM CURATOR: Bruce Roloson W2BDR 2011 by the Antique Wireless Association ISBN 0-9741994-8-6 Cover image is of Ms. Kathleen Parkin of San Rafael, California, shown as the cover-girl of the Electrical Experimenter, October 1916. She held both a commercial and an amateur license at 16 years of age. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyright owner. Printed in Canada by Friesens Corporation Altona, MB ii Table of Contents Volume 24, 2011 Foreword ....................................................................... iv The History of Japanese Radio (1925 - 1945) Tadanobu Okabe .................................................................1 Henry Clifford - Telegraph Engineer and Artist Bill Burns ...................................................................... -
Feedback Amplifiers
The Feedback Amplifier K. J. Åström The Feedback Amplifier 1. Introduction 2. Black’s Invention Karl Johan Åström 3. Bode 4. Nyquist Department of Automatic Control LTH 5. More Recent Developments Lund University 6. Summary Theme: Pure feedback. Lectures The Power of Feedback 1940 1960 2000 Feedback has some amazing properties, it can 1 Introduction 2 Governors | | | ◮ make a system insensitive to disturbances, 3 Process Control | | | ◮ make good systems from bad components, 4 Feedback Amplifiers | | | ◮ follow command signals 5 Harry Nyquist | | | 6 Aerospace | | | ◮ stabilize an unstable system, | ◮ create desired behavior, for example linear behavior from 7 Servomechanisms | | nonlinear components. 8 The Second Phase ← | 9 The Third Phase ← ← The major drawbacks are that ← ← ← ◮ feedback can cause instabilities 10 The Swedish Scene ◮ sensor noise is fed into the system 11 The Lund Scene Introduction Bell and Ericsson ◮ Driving force: Telecommunications a rapidly growing industry ◮ Alexander Graham Bell 1847-1922 ◮ Patent 1876 ◮ No patent in Sweden! ◮ Lars Magnus Ericsson 1846-1926 8 10 6 10 4 10 1880 1900 1920 1940 1960 1980 The AT&T Research Laboratories The Repeater Problem ◮ The electro mechanical repeater Bennet 2 p 70–71: The AT&T Company formed an industrial ◮ 6mm wire 280 kg/km research laboratory as part of its strategy of controlling all ◮ 1911 East coast to Denver American telecommunications, summarized by its then ◮ 1914 First transcontinental New York San Francisco President, Theodore Vail, as ’One Policy, One System, ◮ 1915 Improved transcontinental three vacuum tube Universal Service’. To implement the strategy the company repeaters, two repeaters added in 1916 and two more in needed to control the rate and direction of technical change by 1918. -
Design, Development and Fabrication of Thiophene and Benzothiadiazole Based Conjugated Polymers for Photovoltaics” Is Divided Into Five Chapters
Design, Development and Fabrication of Thiophene and Benzothiadiazole Based Conjugated Polymers for Photovoltaics A thesis submitted by Radhakrishna Ratha Roll No. 11615303 to Indian Institute of Technology Guwahati For the award of the degree of Doctor of Philosophy Center for Nanotechnology Indian Institute of Technology Guwahati Guwahati - 781039 India February, 2018 Statement INDIAN INSTITUTE OF TECHNOLOGY GUWAHATI Guwahati, Assam-781039, India Centre for Nanotechnology STATEMENT I do hereby declare that the work contained in the thesis entitled ‘Design Development and Fabrication of Thiophene and Benzothiadiazole Based Conjugated Polymers for Photovoltaics’ is the result of investigations carried out by me in the Center for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam India under the supervision of Dr. Parameswar Krishnan Iyer, Professor, Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India. This work has not been submitted elsewhere for the award of any degree. Radhakrishna Ratha Center for Nanotechnology Indian Institute of Technology Guwahati Guwahati-781039, Assam, India February 2018 I TH-1906_11615303 Certificate INDIAN INSTITUTE OF TECHNOLOGY GUWAHATI Guwahati, Assam-781039, India Centre for Nanotechnology CERTIFICATE This is to certify that the work contained in the thesis entitled ‘Design Development and Fabrication of Thiophene and Benzothiadiazole Based Conjugated Polymers for Photovoltaics by Radhakrishna Ratha, a Ph.D. student of Center for Nanotechnology, -
Nyquist's Contributions to Control and Communication Åström, Karl Johan
Nyquist's Contributions to Control and Communication Åström, Karl Johan 1993 Document Version: Publisher's PDF, also known as Version of record Link to publication Citation for published version (APA): Åström, K. J. (1993). Nyquist's Contributions to Control and Communication. (Technical Reports TFRT-7512). Department of Automatic Control, Lund Institute of Technology (LTH). Total number of authors: 1 General rights Unless other specific re-use rights are stated the following general rights apply: Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Read more about Creative commons licenses: https://creativecommons.org/licenses/ Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. LUND UNIVERSITY PO Box 117 221 00 Lund +46 46-222 00 00 ISSN 0280-5316 ISRN LUTFD2/TFRT..75 12. -SE l.[yquist's Contributions to Control and Communication Karl Johan Aström Department of Automatic Control Lund Institute of Technolory September 1993 Documcnt namc Department of Automatic Control REPORT Lund Institute of Technology D¿tc of i¡suc P.O. -
Paper-Astrom.Pdf
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights Author's personal copy Automatica 50 (2014) 3–43 Contents lists available at ScienceDirect Automatica journal homepage: www.elsevier.com/locate/automatica Survey Paper Control: A perspective✩ Karl J. Åström a,1, P.R. Kumar b a Department of Automatic Control, Lund University, Lund, Sweden b Department of Electrical & Computer Engineering, Texas A&M University, College Station, USA article info a b s t r a c t Article history: Feedback is an ancient idea, but feedback control is a young field. Nature long ago discovered feedback Received 25 July 2013 since it is essential for homeostasis and life. It was the key for harnessing power in the industrial revolution Received in revised form and is today found everywhere around us. Its development as a field involved contributions from 10 October 2013 engineers, mathematicians, economists and physicists. It is the first systems discipline; it represented a Accepted 17 October 2013 paradigm shift because it cut across the traditional engineering disciplines of aeronautical, chemical, civil, Available online 28 December 2013 electrical and mechanical engineering, as well as economics and operations research. -
Myingyan Degree College-2017 ,Vol-8-Compressed
1 Myingyan Degree College Research Journal Vol .8, 2017 Study and Analysis on Composition Sakkarajs of Three Eigyins of Taungngu Period Tin Oo* Abstract This paper deals with the study and analysis on the composition sakkarajs (Myanmar Era) of such eigyins (classical poems addressed to a royal child extolling the glory of ancestors) as MintayarmedawEigyin, Minyekyawzwar Son Eigyin and Thakhingyi Eigyin appeared in Taungngu Period. This paper reveals the differences in the traditional specifications with regard to the composition sakkarajs of these eigyins comparing and conferring with the chronicles. Introduction The eigyingabyar (classical poem addressed to a royal child extolling the glory of ancestors; the verse begins and ends with the word ‘‘ei’’) is a kind of long ‘‘teigabyar’’(song verse or poem) soothing the royal child. It is a poem composed for the royal sons, daughters and lineages in infancy and beyond infancy. It is also a poem composing with ‘‘ei’’ k ranta or karyan (vowel sound of the letter; rhyma) at the end. The subject matters are the patriotism stimulating performances of the royal great- grandfather, royal father and royal relatives worthy of the highest praise composing eigyin. Therefore, it may be said that eigyin poem is a kind of ‘‘zartiman’’(national spirit; pride of one’s race and nation; pride of one’s lineage) literature capable of stimulating the zartithwei- zartiman (national spirit; hereditary pride and courage; patriotism). It may be designed as a kind of literature with historical value as it is like the contemporary record of that period. Throughout the history of Myanmar literature, 67 eigyins are found. -
New “Moment of Discovery” Web Exhibit Explores Superconductivity
CENTER FOR HISTORY OF PHYSICS NEWSLETTER Vol. XXXIX, Number 2 Fall 2007 One Physics Ellipse, College Park, MD 20740-3843, Tel. 301-209-3165 The Project to Document the History of Physicists in Industry: Some Notes on Methodology By Katy Lawley he Project to Document the History of Physicists in T Industry ends this December, and so far this year we’ve completed the last of the site visits and interviews at industrial labs—at Raytheon in January and Ford in June—and focused on analyzing the 132 interviews that we’ve conducted along with other information that we’ve collected. When we planned the study, we decided that individual interviews with physicists, R&D managers, and information professionals (e.g., technical librarians, archivists, and records managers) who work at 15 of the 27 largest employers of physicists in industry would be the best way to capture the experience and perspectives of the participants with as much richness and context as possible. Business in general has frequently been described as one of the least documented sectors in American society, and sources on the work of corporate physicists are especially rare. So our purpose has been to learn as much as we can about the extent to which these records do exist; how companies Pope Pius XII greets Professor and Mrs. Harlow Shapley following treat correspondence (including e-mail), lab notebooks, the Pope’s address to the International Union (IAU) assembly at and other documentary materials of scientists today; the Castel Gandolfo. Shapley had previously won the Pope Pius XI prize, effect of the computer revolution on records keeping; but had not personally appeared to receive it. -
Asa@Seventyfive
Chapter 1 Short History of the Society’s First Seventy Five Years Charles E. Schmid & Elaine Moran asa@seventyfi ve 7 Short History of the Society’s First Seventy Five Years Charles E. Schmid, Executive Director & Elaine Moran, Offi ce Manager lot can happen in 75 years, whether it be to a Looking back there were a number of reasons why person’s life or the life of a Society. In fact much the idea for a new society on acoustics emerged at that A of the history of the Acoustical Society of Amer- particular time. First, other societies were not fulfi lling ica was built upon the professional lives of its members. the needs of acousticians. In 1929 Harvey Fletcher had Since there was no one source of information for writ- just published his book Speech and Hearing which set the ing this historical account of the Society, information foundation for the fi eld of airborne acoustics to accom- from ASA correspondence fi les, from personal recollec- pany all the new devices which were being invented. He tions, and from the Journal of the Acoustical Society of noted that presenting his papers at the meetings of the America (JASA) and other articles have been gathered to- American Physical Society had been less than stimulating gether to write this informal history. To make it easier to because there were so few people there interested in the read about the entire 75 years—or just segments of those work he was doing. A second reason is given by Dayton years—this history has been organized into six chrono- Miller in his 1935 book Anecdotal History of the Science of logical time segments: Sound to the Beginning of the 20th Century.