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The Power of Role-based e-Learning: Designing and Moderating Online Role Play (Connecting with E-learning)
by Sandra Wills Elyssebeth Leigh Albert IpWritten for educators seeking to engage students in collaboration and communication about authentic scenarios, The Power of Role-Based e-Learning offers helpful, accessible advice on the practice and research needed to design online role play. Drawing on the experiences of world-leading practitioners and citing an array of worldwide examples, it is a readable, non-technical, and comprehensive guide to the design, implementation, and evaluation of this exciting teaching approach. Issues discussed include: designing effective online role plays defining games, simulations and role plays moderating engaging and authentic role-based e-learning activities assessment and evaluation. The Power of Role-Based e-Learning offers a careful analysis of the strengths and learning opportunities of online role play, and is realistic about possible difficulties. Providing guidance for both newcomers and experienced professionals who are developing their online teaching repertoire, it is an invaluable resource for teachers, trainers, academics, and educational support staff involved in e-learning.
The Power of the Internet in China: Citizen Activism Online (Contemporary Asia in the World)
by Guobin YangSince the mid-1990s, the Internet has revolutionized popular expression in China, enabling users to organize, protest, and influence public opinion in unprecedented ways. Guobin Yang's pioneering study maps an innovative range of contentious forms and practices linked to Chinese cyberspace, delineating a nuanced and dynamic image of the Chinese Internet as an arena for creativity, community, conflict, and control. Like many other contemporary protest forms in China and the world, Yang argues, Chinese online activism derives its methods and vitality from multiple and intersecting forces, and state efforts to constrain it have only led to more creative acts of subversion. Transnationalism and the tradition of protest in China's incipient civil society provide cultural and social resources to online activism. Even Internet businesses have encouraged contentious activities, generating an unusual synergy between commerce and activism. Yang's book weaves these strands together to create a vivid story of immense social change, indicating a new era of informational politics.
The Power of the Terroir: the Case Study of Prosecco Wine
by Diego Tomasi Federica Gaiotti Gregory V. JonesThis book draws on an eight-year study carried out in the DOCG Prosecco area of Italy, a wine region known worldwide. It is unique in the sense that it is based on one of the most comprehensive investigations into terroir zoning ever performed in Italy. By drawing attention to the complex interrelations between environmental and human factors that influence the growth and production of the Glera grape, the study illustrates the distinct correlation between a wine and its 'terroir'. It shows that the morphology of the sites, the meso and microclimate, the soil, the grapevine planting density, the trellising system, the yield of the vineyard, and the vine water status in the summer lead to unique combinations of grape maturity, acidity, and aroma that ultimately influence the sensory properties of the wines produced. Furthermore, the book details numerous technical and agronomic considerations, specific to the "Glera" grape variety, for different production strategies, including a section on the impact of climate change on cv "Glera" phenology. "The Power of the Terroir: the Case Study of Prosecco Wine" represents a valuable resource for anyone involved in studies or research activities in the fields of viticulture, climatology, agronomic sciences or soil sciences, but is also of interest to vine growers, professionals in the wine industry, and wine enthusiasts in general.
The Power of Video Technology in International Comparative Research in Education
by Board on International Comparative Studies in EducationInformation on The Power of Video Technology in International Comparative Research in Education
Power On!
by Jean J. Ryoo Jane MargolisA diverse group of teenage friends learn how computing can be personally and politically empowering and why all students need access to computer science education.This lively graphic novel follows a diverse group of teenage friends as they discover that computing can be fun, creative, and empowering. Taylor, Christine, Antonio, and Jon seem like typical young teens—they communicate via endless texting, they share jokes, they worry about starting high school, and they have each other&’s backs. But when a racially-biased artificial intelligence system causes harm in their neighborhood, they suddenly realize that tech isn&’t as neutral as they thought it was. But can an algorithm be racist? And what is an algorithm, anyway? In school, they decide to explore computing classes, with mixed results. One class is only about typing. The class that Christine wants to join is full, and the school counselor suggests that she take a class in &“Tourism and Hospitality&” instead. (Really??) But Antonio&’s class seems legit, Christine finds an after-school program, and they decide to teach the others what they learn. By summer vacation, all four have discovered that computing is both personally and politically empowering. Interspersed through the narrative are text boxes with computer science explainers and inspirational profiles of people of color and women in the field (including Katherine Johnson of Hidden Figures fame). Power On! is an essential read for young adults, general readers, educators, and anyone interested in the power of computing, how computing can do good or cause harm, and why addressing underrepresentation in computing needs to be a top priority.
Power over Peoples
by Daniel R. HeadrickFor six hundred years, the nations of Europe and North America have periodically attempted to coerce, invade, or conquer other societies. They have relied on their superior technology to do so, yet these technologies have not always guaranteed success. Power over Peoples examines Western imperialism's complex relationship with technology, from the first Portuguese ships that ventured down the coast of Africa in the 1430s to America's conflicts in the Middle East today. Why did the sailing vessels that gave the Portuguese a century-long advantage in the Indian Ocean fail to overcome Muslim galleys in the Red Sea? Why were the same weapons and methods that the Spanish used to conquer Mexico and Peru ineffective in Chile and Africa? Why didn't America's overwhelming air power assure success in Iraq and Afghanistan? In Power over Peoples, Daniel Headrick traces the evolution of Western technologies--from muskets and galleons to jet planes and smart bombs--and sheds light on the environmental and social factors that have brought victory in some cases and unforeseen defeat in others. He shows how superior technology translates into greater power over nature and sometimes even other peoples, yet how technological superiority is no guarantee of success in imperialist ventures--because the technology only delivers results in a specific environment, or because the society being attacked responds in unexpected ways. Breathtaking in scope, Power over Peoples is a revealing history of technological innovation, its promise and limitations, and its central role in the rise and fall of empire.
Power Plant Centrifugal Pumps: Problem Analysis and Troubleshooting
by Maurice L. AdamsIn the critical work of maintaining power plant machinery, operating difficulties with centrifugal pumps will inevitably occur because of the essential requirement for electric power plants to operate at all times throughout the year. The root causes and solutions for pump failure comprise major areas of study for engineers in seeking the highest availability of electricity-generating units, extending time between major machinery overhauls and providing early detection of potential failure modes well in advance of machine degradation. This guide for engineers provides a comprehensive overview of the fundamentals of centrifugal pumps, addressing the range of pump operating problems encountered in both fossil and nuclear power plants. The book is divided into three sequential parts: Part I - Primer on Centrifugal Pumps, Part II -Power Plant Centrifugal Pump Applications, and Part III - Trouble-Shooting Case Studies. Employing effective research models developed through years of experience, the author draws on an extensive range of scholarship that covers the detrimental impact of power plant pump failures on overall plant performance, as well as the preventative measures that aid in successful pump maintenance. After covering the performance and components of centrifugal pumps, operating failure modes are covered both for fossil and nuclear power plants. This is followed by the presentation of several power plant pump troubleshooting case studies. The text also walks readers through the various other industrial applications of centrifugal pumps, as in their use within petrochemical plants and in ocean vessel propulsion systems. Recognizing the warning signs of specific impending pump failure modes is essential to minimizing the financial costs of dealing with pump operating problems. To this end, the author lays out a range of theoretical models and relevant examples in support of the essential work of power plant pump use and maintenance:
Power Plant Construction Management: A Survival Guide
by Peter G. HesslerThis timely second edition of Power Plant Construction Management: A Survival Guide is revised and updated to include new technologies, evolving regulations, and the changing power generation mix between gas and coal plants. Hessler expands upon the first edition and provides a thorough plan for managing the financials of building a power plant. He covers the entire process from preplanning to contingency planning to the business of on-site construction management. The book includes checklists, guidelines, photos, and examples that serve as useful tools in the decision-making process. With a focus on finances, management skills, regulations, technology, and much more, this book is a must-read for anyone with a stake in the power plant construction process.
Power Plant Engineering
by Farshid ZabihianOur lives and the functioning of modern societies are intimately intertwined with electricity consumption. We owe our quality of life to electricity. However, the electricity generation industry is partly responsible for some of the most pressing challenges we currently face, including climate change and the pollution of natural environments, energy inequality, and energy insecurity. Maintaining our standard of living while addressing these problems is the ultimate challenge for the future of humanity. The objective of this book is to equip engineering and science students and professionals to tackle this task. Written by an expert with over 25 years of combined academic and industrial experience in the field, this comprehensive textbook covers both fossil fuels and renewable power generation technologies. For each topic, fundamental principles, historical backgrounds, and state-of-the-art technologies are covered. Conventional power production technologies, steam power plants, gas turbines, and combined cycle power plants are presented. For steam power plants, the historical background, thermodynamic principles, steam generators, combustion systems, emission reduction technologies, steam turbines, condensate-feedwater systems, and cooling systems are covered in separate chapters. Similarly, the historical background and thermodynamic principles of gas turbines, along with comprehensive discussions on compressors, combustors, and turbines, are presented and then followed with combined cycle power plants. The second half of the book deals with renewable energy sources, including solar photovoltaic systems, solar thermal power plants, wind turbines, ocean energy systems, and geothermal power plants. For each energy source, the available energy and its variations, historical background, operational principles, basic calculations, current and future technologies, and environmental impacts are presented. Finally, energy storage systems as required technologies to address the intermittent nature of renewable energy sources are covered. While the book has been written with the needs of undergraduate and graduate college students in mind, professionals interested in widening their understanding of the field can also benefit from it.
Power Plant Synthesis (Mechanical and Aerospace Engineering Series)
by Dimitris Al. KatsaprakakisPower Plant Synthesis provides an integrated approach to the operation, analysis, simulation, and dimensioning of power plants for electricity and thermal energy production. Fundamental concepts of energy and power, energy conversion, and power plant design are first presented, and integrated approaches for the operation and simulation of conventional electricity production systems are then examined. Hybrid power plants and cogeneration systems are covered, with operating algorithms, optimization, and dimensioning methods explained. The environmental impacts of energy sources are described and compared, with real-life case studies included to show the synthesis of the specific topics covered.
Power Play: How Video Games Can Save the World
by Asi Burak Laura Parker“An insider’s view of the good things that can emerge from being glued to a screen. . . . A solid piece of pop-culture/business journalism.” —Kirkus ReviewsThe phenomenal growth of gaming has inspired plenty of hand-wringing since its inception—from the press, politicians, parents, and everyone else concerned with its effect on our brains, bodies, and hearts. But what if games could be good, not only for individuals but for the world? In Power Play, Asi Burak and Laura Parker explore how video games are now pioneering innovative social change around the world.As the former executive director and now chairman of Games for Change, Asi Burak has spent the last ten years supporting and promoting the use of video games for social good, in collaboration with leading organizations like the White House, NASA, World Bank, and The United Nations. The games for change movement has introduced millions of players to meaningful experiences around everything from the Israeli-Palestinian conflict to the US Constitution.Power Play looks to the future of games as a global movement. Asi Burak and Laura Parker profile the luminaries behind some of the movement’s most iconic games, including former Supreme Court judge Sandra Day O’Connor and Pulitzer Prize–winning authors Nicholas Kristof and Sheryl WuDunn. They also explore the promise of virtual reality to address social and political issues with unprecedented immersion, and see what the next generation of game makers have in store for the future.
Power Play
by Rick CampbellA thrilling new Trident Deception short story by Rick Campbell. The Russians have their newest class of nuclear attack submarine and is taking it, K-561 Kazan, on a shakedown cruise. Unbeknownst to them, however, this new submarine is being followed by an American submarine, the USS Pittsburgh. The Pittsburgh is to gather any intelligence they can on this new Russian submarine while avoiding detection by the Russians. But what first appears to be the rollout of a new type of submarine, might well be something completely different. Instead the Pittsburgh witness a torpedo firing exercise—and the radical new technology might well not be the submarine, but the torpedo.
Power Play: Tesla, Elon Musk, and the Bet of the Century
by Tim Higgins&“A deeply reported and business-savvy chronicle of Tesla's wild ride.&” —Walter Isaacson, New York Times Book Review &“[A] sweeping history of the electric-car juggernaut…I&’ve covered Tesla as a reporter since 2016. When Higgins writes about facts and situations I&’m familiar with, I can attest he&’s right on the button, every time.&” —Russ Mitchell, Los Angeles TimesPower Play is the riveting inside story of Elon Musk and Tesla's bid to build the world's greatest car—from award-winning Wall Street Journal tech and auto reporter Tim HigginsElon Musk is among the most controversial titans of Silicon Valley. To some he's a genius and a visionary; to others he's a mercurial huckster. Billions of dollars have been gained and lost on his tweets; his personal exploits are the stuff of tabloids. But for all his outrageous talk of mind-uploading and space travel, his most audacious vision is the one closest to the ground: the electric car.When Tesla was founded in the 2000s, electric cars were novelties, trotted out and thrown on the scrap heap by carmakers for more than a century. But where most onlookers saw only failure, a small band of Silicon Valley engineers and entrepreneurs saw opportunity. The gas-guzzling car was in need of disruption. They pitted themselves against the biggest, fiercest business rivals in the world, setting out to make a car that was quicker, sexier, smoother, cleaner than the competition.But as the saying goes, to make a small fortune in cars, start with a big fortune. Tesla would undergo a hellish fifteen years, beset by rivals, pressured by investors, hobbled by whistleblowers, buoyed by its loyal supporters. Musk himself would often prove Tesla's worst enemy—his antics more than once took the company he had initially funded largely with his own money to the brink of collapse. Was he an underdog, an antihero, a conman, or some combination of the three?Wall Street Journal tech and auto reporter Tim Higgins had a front-row seat for the drama: the pileups, wrestling for control, meltdowns, and the unlikeliest outcome of all, success. A story of power, recklessness, struggle, and triumph, Power Play is an exhilarating look at how a team of eccentrics and innovators beat the odds—and changed the future.
Power Play (The Mack Bedford Military Thrillers)
by Patrick RobinsonAn ex–Navy SEAL must thwart a nuclear attack on US soil in this military thriller by a #1 New York Times–bestselling author. A highly volatile nuclear world looms. Israel has obliterated the deep underground nuclear weapons facility built by Iran, and the United States is nerve-wracked about the stance of a defiant North Korea. Against this backdrop, the Russians plan a cyber warfare offensive on the US. In addition to a ballistic strike on the National Security Agency at Fort Meade, they plan to jam the top-secret electronic access key to America&’s missile launch system—the nuclear football. If successful, Russia would establish a temporary dominance over the United States. As this geopolitical battle rages in the shadows, behind locked doors, it is up to a Mossad spymaster based in Moscow to avert the Russian scheme. He calls upon the one man he believes can succeed, US Navy SEAL Commander Mack Bedford. It is now up to Mack to prevent the Russians&’ cyber weaponry from reaching the American mainland, at which point it would be impossible to stop . . . Perfect for fans of James Swallow, Tom Clancy, and Stephen Leather.Praise for the writing of Patrick Robinson&“One of the crown princes of the beach-read thriller.&” —Stephen Coonts, New York Times–bestselling author of The Disciple &“Patrick Robinson has tapped into our fear.&” —Torquay Herald Express&“Robinson [crafts] a fast-paced, chilling, yet believable tale.&” —San Francisco Examiner
Power Prediction Modeling of Conventional High-Speed Craft
by Dejan Radojčić Milan Kalajdžić Aleksandar SimićThe proposed book addresses various power prediction methods, a principal design objective for high-speed craft of displacement, semi-displacement, and planing type. At the core of the power prediction methods are mathematical models based on experimental data derived from various high-speed hull and propeller series. Regression analysis and Artificial Neural Network (ANN) methods are used as extraction tools for this kind of models.The most significant factors for in-service power prediction are bare hull resistance, dynamic trim, and the propeller’s open-water efficiency. Therefore, mathematical modeling of these factors is a specific focus of the book. Furthermore, the book includes a summary of most of the power-prediction-relevant literature published in the last 50 years, and as such is intended as a reference overview of the best high-speed craft modeling practices.Once these mathematical models have been developed and validated, they can be readily programmed into software tools, thereby enabling the parametric analyses required for the optimization of a high-speed craft design. The proposed book is intended primarily for naval architects who design and develop various types of high-speed vessels (yachts, boats etc.), as well as for students who are interested in the design of fast vessels. The book includes useful Excel Macro Codes for the outlined mathematical models. Moreover, software for all considered models is provided.
Power Quality
by Kamal Al-Haddad Bhim Singh Ambrish ChandraMaintaining a stable level of power quality in the distribution network is a growing challenge due to increased use of power electronics converters in domestic, commercial and industrial sectors. Power quality deterioration is manifested in increased losses; poor utilization of distribution systems; mal-operation of sensitive equipment and disturbances to nearby consumers, protective devices, and communication systems. However, as the energy-saving benefits will result in increased AC power processed through power electronics converters, there is a compelling need for improved understanding of mitigation techniques for power quality problems.This timely book comprehensively identifies, classifies, analyses and quantifies all associated power quality problems, including the direct integration of renewable energy sources in the distribution system, and systematically delivers mitigation techniques to overcome these problems.Key features:Emphasis on in-depth learning of the latest topics in power quality extensively illustrated with waveforms and phasor diagrams.Essential theory supported by solved numerical examples, review questions, and unsolved numerical problems to reinforce understanding.Companion website contains solutions to unsolved numerical problems, providing hands-on experience.Senior undergraduate and graduate electrical engineering students and instructors will find this an invaluable resource for education in the field of power quality. It will also support continuing professional development for practicing engineers in distribution and transmission system operators.
Power Quality: Mitigation Technologies In A Distributed Environment (Electric Power Engineering Series)
by C. SankaranFrequency disturbances, transients, grounding, interference…the issues related to power quality are many, and solutions to power quality problems can be complex. However, by combining theory and practice to develop a qualitative analysis of power quality, the issues become relatively straightforward, and one can begin to find solutions to power quality problems confronted in the real world.Power Quality builds the foundation designers, engineers, and technicians need to survive in the current power system environment. It treats power system theory and power quality principles as interdependent entities, and balances these with a wealth of practical examples and data drawn from the author's 30 years of experience in the design, testing, and trouble-shooting of power systems. It compares different power quality measurement instruments and details ways to correctly interpret power quality data. It also presents alternative solutions to power quality problems and compares them for feasibility and economic viability.Power quality problems can have serious consequences, from loss of productivity to loss of life, but they can be easily prevented. You simply need a good understanding of electrical power quality and its impact on the performance of power systems. By changing the domain of power quality from one of theory to one of practice, this book imparts that understanding and will develop your ability to effectively measure, test, and resolve power quality problems.
Power Quality: VAR Compensation in Power Systems
by R. Sastry Vedam Mulukutla S. SarmaBoth deregulation in the electrical supply industry and the creation of new electricity markets present electric utility companies with the challenge of becoming more efficient without compromising quality of service. Providing new solutions for this newly deregulated paradigm, Power Quality: VAR Compensation in Power Systems presents comprehensive coverage of power quality, harmonics, and static var compensators in one single volume. The book explains how to ensure that power quality is not affected by the harmonics generated by power electronic equipment and explains how to reduce labor costs and increase reliability of supply by employing a single pole autoreclosing scheme. It also addresses how to analyze frequency response of current transformers and voltage transformers while measuring harmonics. Based on the authors’ extensive experience in the electric supply industry, Power Quality enables engineers to meet the demands of increased loads, strengthen their transmission systems, and ensure reliable electric supply.
Power Quality Enhancement of Wind Energy Systems
by Wessam Arafa Hafez Adel A. ElbasetThe continuous increase of wind power penetration levels in Egypt makes wind a critical component of power generation in the grid. Studying wind power quality issues and the interaction between wind turbines and the grid is necessary and imperative. The authors present research on power quality and grid code issues, harmonics and wind power, voltage stability improvement using STATCOM, control techniques for active power filters, and the economics of electrical wind energy. The simulation for all of the studies presented is carried out in a MATLAB/Simulink environment using the Simulink power system toolbox. The book also presents case studies on an electrical network-connected wind energy conversion system and gives an overview of the feasibility of having wind power plants in several regions in Egypt, along the Gulf of Suez, on both sides of the Nile, the Mediterranean Sea, and South Upper Egypt.
Power Quality Enhancement using Artificial Intelligence Techniques
by Ahmed S. Abbas Adel Ali Abou El-Ela Ragab A. El-Sehiemy Adel A. ElbasetThis text discusses sensitivity parametric analysis for the single tuned filter parameters and presents an optimization-based method for solving the allocation problem of the distributed generation units and capacitor banks in distribution systems. It also highlights the importance of artificial intelligence techniques such as water cycle algorithms in solving power quality problems such as over-voltage and harmonic distortion. Features: Presents a sensitivity parametric analysis for the single tuned filter parameters. Discusses optimization-based methods for solving the allocation problem of the distributed generation units and capacitor banks in distribution systems. Highlights the importance of artificial intelligence techniques (water cycle algorithm) for solving power quality problems such as over-voltage and harmonic distortion. Showcases a procedure for harmonic mitigation in active distribution systems using the single tuned harmonic filters. Helps in learning how to determine the optimal planning of the single tuned filters to mitigate the harmonic distortion in distorted systems. It will serve as an ideal reference text for graduate students and academic researchers in the fields of electrical engineering, electronics and communication engineering, Power systems planning and analysis.
Power Quality in Microgrids: Issues, Challenges and Mitigation Techniques (Lecture Notes in Electrical Engineering #1039)
by Surender Reddy Salkuti Papia Ray Arvind R. SinghThis book provides a brief insight of various challenges and its mitigation techniques in microgrid due to power quality (PQ) issues. The central concept of this book revolves around the PQ issues in microgrid. The main objective of this book is to make aware of the power and control engineers with different innovative techniques to mitigate the challenges due to PQ issues in microgrid. The topics covered in this book are PQ disturbances in microgrid and different recent and innovative schemes to mitigate them. The book emphasizes technical issues, theoretical background, and practical applications that drive postgraduates, researchers, and practicing engineers with right advanced skills, vision, and knowledge in finding microgrid power quality issues, various technical challenges and providing mitigation techniques for the future sustainable microgrids.
Power Quality in Power Distribution Systems: Concepts and Applications
by Mahesh Kumar MishraThe comprehensive textbook will help readers to develop analytic reasoning of power quality aspects in distribution power systems. It will as an ideal study material for senior undergraduate and graduate students in the field of electrical engineering, electronics and communications engineering. • Provides explanation of transformations and power theories for single phase and three-phase systems. • Discusses concepts illustrating power quality aspects in power distribution network. • Examines detailed derivations and analysis of voltage and current compensation techniques. • Discusses custom power devices such as DSTATCOM, DVR and UPQC. • Presents solved examples, theoretical and numerical exercises in each chapter. This textbook comprehensively covers fundamentals concepts of power quality with the help of solved problems. It provides basic understanding of power quality aspects in power systems, especially in power distribution networks and explains issues related to power quality problems, their quantificati
Power Quality: Infrastructures and Control (Studies in Infrastructure and Control)
by Ashutosh K. Giri Sabha Raj Arya Josep M. Guerrero Shailendra KumarThis book presents novel idea and concepts developed by the researchers/academia and practicing engineers working in the domain of the power sector infrastructures where power electronics infrastructures are used for improving the system reliability and efficiency in on-grid and off-grid systems. The infrastructures of distributed power generation based on wind, solar, hydro and many other renewable energy sources have increased manifold since last decade due to availability of efficient power converters and small rating generators. The application of power electronics switching devices has made job much easier to make such system infrastructures more reliable and controllable. The power quality (PQ) issues in infrastructures of distributed power generation system are a major concern for customers. The custom power devices such as voltage source converter are used to mitigate the PQ and other issues such as voltage and frequency control under different loading conditions on the supply system. The operation of these custom power devices or other power converters is dependent on the duty cycles generated by control algorithm. The scope of control algorithm may be varying from model predictive control techniques, machine learning techniques to other artificial intelligence-based techniques. In addition to it, some classical control algorithm and adaptive-type control algorithm may also be used for power converter operation. This book creates awareness among teachers, research students and industry persons about better utilization of infrastructures of distributed power generation system by making it more efficient with the use of power electronics and its control.
Power Quality Issues: Current Harmonics
by Suresh Mikkili Anup Kumar PandaPower Quality Issues: Current Harmonics provides solutions for the mitigation of power quality problems related to harmonics. Focusing on active power filters (APFs) due to their excellent harmonic and reactive power compensation in two-wire (single phase), three-wire (three-phase without neutral), and four-wire (three-phase with neutral) AC power networks with nonlinear loads, the text: Introduces the APF technology, describing various APF configurations and offering guidelines for the selection of APFs for specific application considerations Compares shunt active filter (SHAF) control strategies for extracting three-phase reference currents, evaluating their performance under a number of source voltage conditions using a proportional-integral (PI) controller Presents PI controller-based SHAF instantaneous active and reactive power (p-q) and instantaneous active and reactive current (Id-Iq) control strategies, supplying detailed MATLAB®/Simulink simulation results Proposes SHAF control strategies using type 1 and type 2 fuzzy logic controllers (FLCs) with different fuzzy membership functions (MFs), analyzing their harmonic mitigation and DC link voltage regulation Verifies the proposed type 2 FLC-based SHAF control strategies with trapezoidal, triangular, and Gaussian fuzzy MFs using RT-LAB, a real-time digital simulation software from OPAL-RT Technologies Power Quality Issues: Current Harmonics is a useful resource for those tackling electrical power quality challenges. The compensation techniques described in this book alleviate harmonic issues that can distort voltage waveforms, fry a building’s wiring, trigger nuisance tripping, overheat transformer units, and cause random end-user equipment failure.
Power Scaling of Enhancement Cavities for Nonlinear Optics
by Ioachim PupezaEnhancement cavities are passive optical resonators in which continuous-wave laser radiation or pulses of a frequency comb are coherently overlapped, allowing for a power and intensity scaling of up to several orders of magnitude. A prominent application is the table-top generation of bright, laser-like radiation in spectral regions where direct laser action is inefficient or not available at all, via intracavity nonlinear optical processes. However, to exploit the full capacity of this technique further progress is needed. This thesis covers central problems of enhancement cavities, such as finding limitations in scaling the circulating power, measuring cavity parameters with high accuracy, tailoring transverse modes and coupling out radiation generated in the cavity. Unprecedented intracavity laser powers were demonstrated, surpassing previous results by an order of magnitude. As an application, harmonics of the fundamental 1040-nm radiation up to the 21st order are generated. Besides reporting these fine experimental results, the thesis provides an excellent introduction into the physics of enhancement cavities, supported by more than 140 references.