Science Fun with Electricity...Discoveries and Innovations
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Supercapattery: Merit-Merge of Capacitive and Nernstian Charge Storage Mechanisms
Supercapattery: Merit-merge of capacitive and Nernstian charge storage mechanisms George Zheng Chen University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo, 315100, Zhejiang, China. First published 2020 This work is made available under the terms of the Creative Commons Attribution 4.0 International License: http://creativecommons.org/licenses/by/4.0 The work is licenced to the University of Nottingham Ningbo China under the Global University Publication Licence: https://www.nottingham.edu.cn/en/library/documents/research- support/global-university-publications-licence-2.0.pdf Supercapattery: Merit-merge of capacitive and Nernstian charge storage mechanisms George Zheng Chen1,2 1 Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK 2 Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, University Park, Ningbo 315100, China Email: [email protected] Abstract Supercapattery is the generic name for hybrids of supercapacitor and rechargeable battery. Batteries store charge via Faradaic processes, involving reversible transfer of localised or zone-delocalised valence electrons. The former is governed by the Nernst equation. The latter leads to pseudocapacitance (or Faradaic capacitance) which may be differentiated from electric double layer capacitance with spectroscopic assistance such as electron spin resonance. Since capacitive storage is the basis of supercapacitors, the combination of capacitive and Nernstian mechanisms has dominated supercapattery research since 2018, covering nanostructured and compounded metal oxides and sulfides, water-in-salt and redox active electrolytes and bipolar stacks of multi-cells. The technical achievements so far, such as specific energy of 270 Wh/kg in aqueous electrolyte, and charging-discharging for over 5000 cycles, benchmark a challenging but promising future of supercapattery. -
History of Transistors
TRANSISTOR MUSEUM™ HISTORY OF TRANSISTORS VOLUME 1 THE FIRST GERMANIUM HOBBYIST TRANSISTORS Special Collection of Historic Transistors Designed for the Historian, Engineer, Experimenter, Researcher and Hobbyist INCLUDED ARE CLASSIC EXAMPLES OF THESE 1950/60s GERMANIUM HOBBYIST TRANSISTORS 2N35 2N107 SURFACE BARRIER 2N170 CK78X A Publication of the Transistor Museum™ Copyright © 2009 by Jack Ward ABOUT THIS BOOK AND THE TRANSISTOR MUSEUM™ This book is the first of a series of History of Transistors publications developed by the Transistor Museum™. The History of Transistors Volume 1 documents The First Germanium Hobbyist Transistors, a subject that should be of great interest to the modern-day experimenter, engineer, historian, researcher and hobbyist. Included in the book are technical descriptions, historical commentary, circuits, and photographs of the famous germanium transistors that first appeared in the 1950s and have had a profound effect on the world of electronics ever since. Also included are working examples of some of the best remembered hobbyist transistors – 2N35, 2N107, Surface Barrier, 2N170, and CK78X. The web version of this book is available as a pdf at this url: http://www.semiconductormuseum.com/MuseumLibrary/HistoryOfTransistorsVolume1.pdf You can purchase a hardcopy version of the book, which also includes packaged examples of all five hobbyist transistors listed above, as well as additional storage/display envelopes for starting your own collection. You can visit the Transistor Museum™ Store for details on how to purchase this book as well as numerous other historic semiconductors and publications. http://www.semiconductormuseum.com/MuseumStore/MuseumStore_Index.htm The Transistor Museum™ is a virtual museum that has been developed to help preserve the history of the greatest invention of the 20TH century – the TRANSISTOR. -
Effects of Various Electrical Fields on Seed Germination Fredrick Warner Wheaton Iowa State University
Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1968 Effects of various electrical fields on seed germination Fredrick Warner Wheaton Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Agriculture Commons, and the Bioresource and Agricultural Engineering Commons Recommended Citation Wheaton, Fredrick Warner, "Effects of various electrical fields on seed germination " (1968). Retrospective Theses and Dissertations. 3521. https://lib.dr.iastate.edu/rtd/3521 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. This dissertation has been microfilmed exactly as received 69-4288 WHEATON, Fredrick Warner, 1942- EFFECTS OF VARIOUS ELECTRICAL FIELDS ON SEED GERMINATION. Iowa State University, Ph.D., 1968 Engineering, agricultural University Microfilms, Inc., Ann Arbor, Michigan EFFECTS OF VARIOUS ELECTRICAL FIELDS ON SEED GERMINATION by Fredrick Warner Wheaton A Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHILOSOPHY Major Subject: Agricultural Engineering Approved : Signature was redacted for privacy. Signature was redacted for privacy. Signature was -
Recent Advances in Electrical Doping of 2D Semiconductor Materials: Methods, Analyses, and Applications
nanomaterials Review Recent Advances in Electrical Doping of 2D Semiconductor Materials: Methods, Analyses, and Applications Hocheon Yoo 1,2,† , Keun Heo 3,† , Md. Hasan Raza Ansari 1,2 and Seongjae Cho 1,2,* 1 Department of Electronic Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; [email protected] (H.Y.); [email protected] (M.H.R.A.) 2 Graduate School of IT Convergence Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea 3 Department of Semiconductor Science & Technology, Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Korea; [email protected] * Correspondence: [email protected] † These authors contributed equally to this work. Abstract: Two-dimensional materials have garnered interest from the perspectives of physics, materi- als, and applied electronics owing to their outstanding physical and chemical properties. Advances in exfoliation and synthesis technologies have enabled preparation and electrical characterization of various atomically thin films of semiconductor transition metal dichalcogenides (TMDs). Their two-dimensional structures and electromagnetic spectra coupled to bandgaps in the visible region indicate their suitability for digital electronics and optoelectronics. To further expand the potential applications of these two-dimensional semiconductor materials, technologies capable of precisely controlling the electrical properties of the material are essential. Doping has been traditionally used to effectively change the electrical and electronic properties of materials through relatively simple processes. To change the electrical properties, substances that can donate or remove electrons are Citation: Yoo, H.; Heo, K.; added. Doping of atomically thin two-dimensional semiconductor materials is similar to that used Ansari, M..H.R.; Cho, S. -
Have Shown an Apical Transport of Heteroauxin (Indole-3-Acetic Acid)
ELECTRICAL POLARITY AND AUXIN TRANSPORT W. G. CLARK (WITH TEN FIGURES) Introduction The polar basal transport of the growth substances (auxins, growth hormones) in plants is a well known phenomenon, demonstrated first by WENT (81), and studied in detail by VAN DER WEIJ (78, 80). These investi- gators used the Avena (oat) coleoptile.' That the phenomenon is more or less general is indicated by the polar transport of auxin in roots (CHOLODNY, 19; NAGAO 60); in hypocotyls of Raphanus (VAN OVERBEEK, 62), of Pisum (SKOOG, 74); in leaves (AVERY, 2); in the coleoptile of Avena (WENT, 81; LAIBACH and KORNMANN, 40; VAN DER WEIJ, 78, 80; and SKOOG, 74) and corn (VAN OVERBEEK, 63); in Elaeagnus (woody cutting) (VAN DER WEIJ, 79); in stems of Coleus, Vicia, and Phaseolus; and in hypocotyls of Vicia, Phaseolus, and Lupinus (MAI, 54). Other workers have reported non-polar transport of auxin in plants. HITCHCOCK and ZIMMERMAN (31) and ZIMMERMAN and WLCOXON (85) have shown an apical transport of heteroauxin (indole-3-acetic acid) and several other active compounds in stems of Helianthus tuberosus, Nicotiana tabacum, and in Lycopersicum esculentum, as indicated by induction of adventitious roots and by epinastic response of leaves. LOEHWING and BAUGUESS (45) have shown that heteroauxin could be absorbed by the root system of potted seedlings of Matthiola incana and be transported apically to increase the stem elongation over that of the controls. Both the Boyce- Thompson workers and LOEHWING and BAUGUESS have merely shown that auxin applied in high concentrations can be carried in the transpiration stream. This, of course, will not give polar transport. -
Light-Emitting Diode - Wikipedia, the Free Encyclopedia
Light-emitting diode - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Light-emitting_diode From Wikipedia, the free encyclopedia A light-emitting diode (LED) (pronounced /ˌɛl iː ˈdiː/[1]) is a semiconductor Light-emitting diode light source. LEDs are used as indicator lamps in many devices, and are increasingly used for lighting. Introduced as a practical electronic component in 1962,[2] early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness. When a light-emitting diode is forward biased (switched on), electrons are able to recombine with holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of Red, green and blue LEDs of the 5mm type 2 the semiconductor. An LED is usually small in area (less than 1 mm ), and Type Passive, optoelectronic integrated optical components are used to shape its radiation pattern and assist in reflection.[3] LEDs present many advantages over incandescent light sources Working principle Electroluminescence including lower energy consumption, longer lifetime, improved robustness, Invented Nick Holonyak Jr. (1962) smaller size, faster switching, and greater durability and reliability. LEDs powerful enough for room lighting are relatively expensive and require more Electronic symbol precise current and heat management than compact fluorescent lamp sources of comparable output. Pin configuration Anode and Cathode Light-emitting diodes are used in applications as diverse as replacements for aviation lighting, automotive lighting (particularly indicators) and in traffic signals. -
Historical Perspective of Electricity
B - Circuit Lab rev.1.04 - December 19 SO Practice - 12-19-2020 Just remember, this test is supposed to be hard because everyone taking this test is really smart. Historical Perspective of Electricity 1. (1.00 pts) The first evidence of electricity in recorded human history was… A) in 1752 when Ben Franklin flew his kite in a lightning storm. B) in 1600 when William Gilbert published his book on magnetism. C) in 1708 when Charles-Augustin de Coulomb held a lecture stating that two bodies electrified of the same kind of Electricity exert force on each other. D) in 1799 when Alessandro Volta invented the voltaic pile which proved that electricity could be generated chemically. E) in 1776 when André-Marie Ampère invented the electric telegraph. F) about 2500 years ago when Thales of Miletus noticed that a piece of amber attracted straw or feathers when he rubbed it with cloth. 2. (3.00 pts) The word electric… (Mark ALL correct answers) A) was first used in printed text when it was published in William Gilber’s book on magnetism. B) comes from the Greek word ήλεκτρο (aka “electron”) meaning amber. C) adapted the meaning “charged with electricity” in the 1670s. D) was first used by Nicholas Callen in 1799 to describe mail transmitted over telegraph wires, “electric-mail” or “email”. E) was cast in stone by Greek emperor Julius Caesar when he knighted Archimedes for inventing the electric turning lathe. F) was first used by Michael Faraday when he described electromagnetic induction in 1791. 3. (5.00 pts) Which five people, who made scientific discoveries related to electricity, were alive at the same time? (Mark ALL correct answers) A) Charles-Augustin de Coulomb B) Alessandro Volta C) André-Marie Ampère D) Georg Simon Ohm E) Michael Faraday F) Gustav Robert Kirchhoff 4. -
Enamel Rating Reference Guide
Enamel Rating: Reference Guide This reference guide is a collection of useful information relating to the widely used enamel rating test. The test itself is quite simple, but why it works and how to get the best from the test is not necessarily well known. What is enamel rating? Enamel rating is a test that checks the integrity of internal coatings applied to metal packaging. The test is carried out using an electronic gauge plus a device that holds the product and connects it to the gauge. If the internal coating of a can or end has not been adequately applied, some areas of the metal substrate will be exposed to the contents of the can, which may result in metal corrosion and contamination of the contents, depending on the product to be contained. Enamel rating is also sometimes referred to as a ‘metal exposure test’, ‘mA test’, or ‘porosity test’. How it works Cans are tested by filling them with a conductive electrolyte—typically salty water. Ends are tested with apparatus that dips the product side of the end in the electrolyte. A test probe is immersed in the electrolyte and the metal substrate is connected via exterior contacts. These are normally sharpened to cut through external lacquers and decoration. The electrolyte naturally conforms to the inner surface of the can or end, potentially creating an electrical circuit when a voltage (6.3VDC) is applied to the test probe for 4 seconds. Electricity can flow through electrolyte because negatively charged salt ions migrate towards the positive electrode (the contacts attached to the metal substrate) creating a current flow. -
Leap Lessons Iib Wired for Magnetism.P65
S : S : “Wired for Magnetism” 4th-8th Grade Lesson Plan 4-H Helps YOUth Leap into the 21st Century 1 Dear Project Helper, This lesson, “Wired for Magnetism,” is part of an effort by the 4-H Youth Development Department of the LSU AgCenter to provide teaching activities that are fun as well as educational. We are pleased you have agreed to work with youth as they learn and grow. You will help them learn scientific concepts that they will use for many years. These lessons address the Louisiana Content Standards Science Benchmarks; therefore, what you do with this activity should help strengthen students for LEAP testing. Thank you for your time and effort. In this lesson, the following Benchmarks will be addressed: SI-M-A2: designing and conducting a scientific investigation SI-M-A6: comparing alternative explanations and predictions SI-M-A7: communicating scientific procedure, information, and explanation PS-M-A2: recognizing different forces and describing their effects (gravity, electrical, magnetic) PS-E-C6: exploring and describing simple energy transformations 4th-8th Grade Lesson Plan 4-H Helps YOUth Leap into the 21st Century 2 S : Learning Activity: “Wired for Magnetism” Key Concepts: 1. When electricity flows through a wire, a magnetic field Track: is produced around it, creating an electromagnet. Physical Science 2. An electromagnet is a “temporary” magnet and exists Life Skills: only when electricity is flowing. Problem Solving, Acquiring 3. Different forces can create change. and Applying information, Observing and How Can Members Apply this Information? Experimenting 1. Identify the parts of an electromagnet. Character Focus: 2. -
V-TECS Guide for Electronics Mechanic. INSTITUTION South Carolina State Dept
DOCUMENT RESUME ED 265 371 CE 043 346 AUTHOR Meyer, Calvin F.; Benson, Robert T. TITLE V-TECS Guide for Electronics Mechanic. INSTITUTION South Carolina State Dept. of Education, Columbia. Office of Vocational Education. PUB DATE 85 NOTE 303p. PUB TYPE Guides - Classroom Use - Guides (For Teachers) (052) EDRS PRICE MF01/PC13 Plus Postage. DESCRIPTORS Behavioral Objectives; Check Lists; *Course Content; *Course Organization; Curriculum Guides; Educational Resources; *Electric Circuits; *Electronics; Equipment; Evaluation Methods; Hand Tools; Learning Activities; *Mechanics (Process); Postsecondary Education; State Standards; *Technical Education; Test Items; Vocational Education ABSTRACT This document is a curriculum guide for a course for electronics mechanics for use in vocational-techrical education. The course outline includes the following units: adjusting/aligning/calibrating electronic circuitry, replacing components, maintaining electronic devices, designing equipment and circuitry, performing environmental tests, and administering personnel. Each unit contains a performance objective with a task, conditions, standard, and source for standard; a performance guide; enabling objectives; learning activities; resources; evaluation/questions and answers; practical applications; methods of evaluation; and checklists for performance objectives. Extensive appendixes to the guide contain cross-reference tables of duties, tasks, and performance objectives; definitions of terms; tools and equipment lists; sources for standards; a reference -
Gradniki in Tehnologije V Sistemih Vodenja
Univerza v Ljubljani Fakulteta za elektrotehniko Alesˇ Belicˇ Gradniki in tehnologije v sistemih vodenja Ljubljana 22. januar 2012 2 3 Predgovor Obravnava snovi pri predmetih Gradniki v sistemih vodenja na Univerzitetnem studijskemˇ programu in Gradniki v tehnologiji vodenja na visokosolskemˇ strokovnem studijskemˇ pro- gramu Fakultete za elektrotehniko Univerze v Ljubljani je nekoliko drugacnaˇ kot pri ostalih predmetih na smeri Avtomatika. Cepravˇ sta to dva od osnovnih predmetov na smereh, pa se vendarle ne navezujeta cistoˇ neposredno na ostale predmete na studijskihˇ programih Avto- matike. Ucbenikˇ obravnava prakticneˇ in izvedbene vidike sistemov vodenja, ki ostanejo pri poglobljeni obravnavi algoritmov vodenja mnogokrat v ozadju. Izbira ustreznih merilnih sistemov, krmilnikov ali regulatorjev ter izvrsnihˇ sistemov, ki pokrijejo potrebe po mociˇ in preciznosti vodenja, je kljucnaˇ za kvalitetno izvedbo vodenja. Ne glede na dobro nacrtanoˇ shemo vodenja, je na koncu vse odvisno od izvedbe. V praksi je delezˇ vlozenegaˇ dela v resnici mocnoˇ na strani izvedbenih problemov sistema vodenja, medtem ko se algoritmom vodenja posvetimo seleˇ proti koncu izvedbe, ko je obicajnoˇ premalo casa,ˇ da bi algoritem in njegove parametre optimalno nastavili. Pomen snovi tega predmeta za izvedbo sistemov vodenja je torej nesporen. Po drugi strani pa je to predmet, ki zahteva precej ucenjaˇ na pa- met, saj je potrebno sirokoˇ poznavanje moznihˇ podsistemov in principov delovanja. Snov, ki je zbrana v tej knjigi je plod lastnih izkusenjˇ avtorja na tem podrocjuˇ s pomembnimi pri- spevki prof. dr. Riharda Karbe, prof. dr. Jusaˇ Kocijana, prof. dr. Maje Atanasijevic-Kunc,´ doc. dr. Gregorja Klancarjaˇ in dr. Janka Petrovciˇ ca,ˇ ki zeˇ dolga leta sodelujejo na temah, ki jih predmet obravnava. -
IMPLICATIONS F.OR POST-SECONDARY ELECTRICAL ENGINEERING TECHNOLOGY EDUCATION. by Jana Marie Jilek
A FRAMEWORK FOR THE EX.A.MINÀTION OF THEORIES OF' ELECTRICITY: IMPLICATIONS F.OR POST-SECONDARY ELECTRICAL ENGINEERING TECHNOLOGY EDUCATION. By Jana Marie Jilek A Thesis submitted to the Faculty of Graduate Studies of The University of Manitoba in partial fulfillment of the requirements of the degree of DOCTOR OF PHILOSOPHY Faculty of Education The University of Manitoba Winnipeg Copyright O 2006 by Jana Marie Jilek TIIE UMVERSITY OF MANITOBA FACTJLTY OF G.RADUATE STIJDIES COP}'RIGHT PERMISSION A FRAMEWORK F'OR THE EXAMINATION OF THEORIES OF ELECTRICITY: IMPLICATIONS FOR POST-SECONDARY ELECTRICÀL ENGINEERING TECHNOLOGY EDUCATION BY Jana Marie Jilek A Thesis/Practicum submitted to the Faculty ofGraduate Studies ofThe University ol' Manitoba in partial fulfillment of the requirement of the degree of DOCTOR OF PHILOSOPHY Jana Marie Jilek @ 2006 Permission has been granted to the Library ofthe University of Manitoba to lend or sell copies of this thesis/practicum, to the Nâtional Library of Canada to microfilm this thesis and to lend or sell copies of the film, and to University Microfìlms Inc. to publish an abstract of this thesis/practicum. This reproducti0n or copy of this thesis has been made available by authority ofthe copyright orvner solely for the purpose ofpriyâte study and research, and may only be reproduced and copied as permitted by copyright larvs or with express rvritten authorization from the copyright owner. ABSTRACT Contrary to what many textbooks and modeln-day classroom presentations claim, the evolution ofour current concepts ofelectricity did not follow a neat straight-forward path. The twists and turns taken often resulted in terminology and analogies that are frequently misleading to students.