Smith-Purcell Radiation
Smith-Purcell radiation is the name given to the radiation produced when a charged particle beam, usually electrons, passes close to the surface of a metallic grating. The wavelength of the emitted radiation depends on the period of the grating and on the angle of observation. This makes this phenomenon a very useful tuneable source of radiation in the far-infrared (or THz) part of the spectrum, where tuneable sources are scarce. Moreover, a spectral analysis of the radiation can be used to reconstruct the time profile of the very short (picosecond or sub-picosecond) electron bunches that gave rise to this radiation. This is a parameter that is of interest to accelerator designers and users. The book is aimed primarily at experimentalists but starts with a relatively simple theoretical description of the origin of this radiation and then discusses its application either as a beam diagnostic tool or as a tuneable source of THz radiation. There is also a brief overview of other THz sources in order to allow the reader to assess the advantages of Smith-Purcell radiation.
Wide-Area Damping of Power Systems Oscillations using Model Predictive
Electrical hazard and post disaster
Existing electricity market across the globe has been extremely exaggerated by electrical hazards which are highly impacted at residential level, commercial level, public building, electrical utility, as well as personal human health. To avoid hazard critical awareness are required in everyday life as well as post disaster reconstruction jobs. This book is highlighted the severe disasters associated with electrical hazard along with environmental and health impact. Generalized analysis all over the world has been made on different kinds of fatal and nonfatal electrical injuries that highly impact human life as well as animal life. This book highlights basically the various safety precautions to the daily user as well as worker for repair and maintenance as post-operative electrical hazard circumstances in different locations. This extensive literature review deals with the risk analysis related to the electricity sector, systematic arrangement for controlling electrical hazard, electrical safety precautions at various voltage levels, adverse effect of electrical hazards in human life.
Electrostatics and Magnetostatics
This textbook offers you a profound understanding of the core concepts in electrostatics and magnetostatics. Emphasis is placed on establishing strong mathematical fundamentals while also equipping you with problem-solving skills crucial for mastering these disciplines. It covers basic equations of electrostatics and solution of the Poisson equation as well as Magnetostatics.
The geometric optics basis
At the request of our students "3rd year License in Optical Instrumentation" of the Institute of Optics and Precision Mechanics - University Ferhat Abbes S矇tif 1 Algeria, I have honor to present this modest work with a concern for rigor and clarity. Work inspired by several well-known references. This course, which I taught for five years, covers some optical elements (mirror, diopter and lens) in a fairly educational way and very rich in information, especially the first chapter, it was well studied on all levels. In the last chapters, we discuss in detail the optical aberrations and the human eye and its components. In the end, we present the various vision defects (Ametropia) and their corrections. Overall, this manuscript provides students with basic but useful information, namely the basic elements of geometric optics and allows them to acquire other knowledge in the context of more in-depth studies. I hope that this manuscript will provide valuable help not only to preparatory or university students but also to our teaching colleagues.
Electrical Vehicles Implementation
The number of charging sites is another important factor in how many EVs people buy. To keep up with increasing amount of EVs on the road, both the government and private businesses are putting money into building an ecosystem of charging sites. Building this infrastructure is very important for the commercialization of electric vehicles, as it provides drivers with peace of mind and eliminates range anxiety.More and more people are buying electric vehicles (EVs) these days because they are better for the earth than regular cars that run on gasoline. The battery pack stores energy that powers the electric motor of the car. EVs need to know about the different ways their batteries can be charged so they can run properly.The different types of battery charges for EVs offer a range of options to meet the varying needs of EV owners. While AC charging is the most widely available and convenient option, DC charging, inductive charging, solar charging, and regenerative braking all offer unique benefits that can enhance the overall EV driving experience.
Monitoring and Controlling of Substation Using Zigbee Technology
This book proposes an innovative design to develop a system to monitor and control various electrical loads from the substation. The design generally consists of two units, one in the substation unit called transmitter unit, and another one is the Main station called as controlling or receiving unit. The transmitter unit is where the power is monitored continuously by Arduino microcontroller. Zigbee is used for transmitting the signals that are obtained. The controlling unit or receiver unit in the main station receives the transmitted signals by means of the zigbee receiver and displays in the laptop and reacts in accordance to the received signal. The ultimate objective is to monitor the electrical parameters continuously and hence to guard the burning of the equipments in the station due to the constraints such as overload, over temperature and input high voltages. If any of these values increases beyond the limit then the entire unit is shut down by the designed controlling unit.
Polymer Composites
Many detailed studies were carried out on polymer micro/ nanocomposites that are used in high-voltage applications. The study was based on a lot of previously published research work on the field. Particular focus is on the structure-property relationship of composite materials used in power engineering, by exploiting fundamental theory as well as numerical/analytical models and the influence of material design on electrical, mechanical and thermal properties. In addition to describing the scientific development of micro/nano-composites electrical features desired in power engineering, the study is mainly focused on the electrical properties of insulating materials, particularly cross-linked polyethylene (XLPE) and epoxy resins, unfilled and filled with different types of filler. Polymer micro/ nanocomposites based on XLPE and epoxy resins are usually used as insulating systems for high-voltage applications, such as: cables, generators, motors, cast resin dry-type transformers, etc.
The notion of electric field
This paper offers an overview of didactic reflections on the introduction of the concept of electric field in Physics teaching activities aimed at the secondary level of Basic Education, using a teaching methodology based on a low-cost experiment. We analyze the particular use of the experiment called the electrostatic vector and its use in teaching the idea of lines of force, proposed by Faraday in the 19th century. We analyze how this approach differs from that normally presented in textbooks. We argue that the use of low-cost experiments will not lead to learning, but rather the work of the teacher who provides interaction between the subject and the electrostatic vector. Both the teacher and the experiment play an important role in the lesson.
Research on Electro-Optical Hybrid HPC Based on SPP
The application of SPP has created possibilities for the size of photonics devices compared to the operating wavelength. However, SPP has severe Ohmic attenuation and significant optical insertion loss, resulting in limited optical signal transmission distance. To eliminate the above situation, we used a silicon waveguide with hybrid mode SPP, and provide relevant theoretical and analysis. Hybrid SPP silicon waveguides, and then provide design methods for electro-optic hybrid half adders, full adders, subtractors, and multiplications based on SPP, and provide detailed discussions and verifications in this book. Finally, the design and research of temperature sensors for on-chip networks were also involved. The mode of electro-optic hybrid computing not only utilizes the advantages of high-frequency operation, electromagnetic immunity, and low power consumption in optics, but also takes advantage of the ease of storage in electrical engineering. The technical solutions and experimental results described in this book, which provide theoretical and practical references for the implementation of electro-optic hybrid computing.
Practical Physics
This book, entitled "Practical Physics: Wave Motion and Optics for Undergraduate Students," is designed for B.Sc. students in Indian universities. The main objective of this book is to provide a clear and conceptual understanding of the fundamental principles of wave motion and optics. The experiments included cover various areas of physics related to these topics. Written in accordance with the New Education Policy prescribed by the University Grants Commission, this book aims to present complex ideas in simple language.The experiments outlined will help students gain expertise in analyzing various concepts related to wave motion and optics. We hope this book will serve as a valuable resource, enhancing students' understanding through detailed descriptions of the experiments.
Generation of electrical energy by gravitational effect
With this research we demonstrate that the experiment of the free fall of bodies can be repeated, but with different objectives than those that motivated Galileo Galilei to perform an experiment using the inclined plane. The hypothesis that guided our investigation was: The experiment of the free fall of bodies is susceptible to change its purpose. To confirm this hypothesis, it was necessary to invent a technological prototype that works when a suspended body falls towards the center of the Earth; in the case of the experimental processes that allowed us to confirm our hypothesis, the body to be attracted was the mass of water contained in one or more containers. After having confronted the theories with the results of the experimental processes, the hypothesis was confirmed, as expressed in the main conclusion of the experiment: By using a sash as a means of transmission of gravitational potential energy, with a flow rate of 10, 757 L/min, with a height of 8.56 m, we will be able to obtain 11, 56 volts DC. The results of the present research have made possible the granting of a patent.
Fault Diagnosis of PMSMs and Radar Servo Systems based on Digital Twin
Permanent magnet synchronous motor is widely used in industry because of its small size, low cost, high efficiency and excellent performance. Permanent magnet synchronous motor is gradually becoming an important part of numerical control system. To ensure the stable operation of permanent magnet synchronous motor is a necessary condition to ensure the stable operation of numerical control equipment. In actual production, due to the complex working environment and long working time of permanent magnet synchronous motor, stator windings of permanent magnet synchronous motor are prone to inter-turn short circuit fault. If we do not take effective measures in time, a small failure will become a major failure, resulting in the breakdown of the whole system. If the motor faults are diagnosed according to the historical operation data of the permanent magnet synchronous motor, and the life prediction of the motor winding can ensure the stable and reliable operation of the motor equipment, give full play to the performance of the motor, to reduce economic losses and avoid catastrophic accidents.
Monitoring of Hybrid Power Generation Parameters on Smart Highways
The wind turbines are designed to produce wind energy from the highway due to rapid move of vehicles. The fast growing source of energies are wind and solar. We are using the wind energy as it is freely available everywhere. Due to the movement of vehicles, the wind energy is enormously produced on the highways which are unused. So, we can make use of this energy to produce power and to overcome some problems of electricity. Now, we can place the windmill or wind turbines at the mid of the highway, because it can generate the energy when the vehicles move on the both sides. The generated power is used for nearby streetlights. The energy which is produced by wind turbines due to rapid movement of vehicles on highway is basically controlled from the base station through IOT. The amount of energy that is generated by wind turbines are used for nearby street lights on highway and nearby villages. The major problem with wind energy if fluctuation of wind. Energy will not be constant every time. So, if we use wind turbines on the highway, there will be constant wind due to rapid moving of vehicles.
Rural Electrification Design
Electrical energy is the basic necessity for the economic development of a country due to its importance to human life and occupies the top position in the energy hierarchy. It finds innumerable uses in the home, industry, agriculture, and transport. This study is geared towards the analysis of a Grid-Based Rural Electrification Scheme for the Ekpe-Aggah Community in Rivers State, Nigeria. The method used in achieving this, relies on optimization principles based on iteration & analysis. The essential material used in the design of the distribution network is Electrical Transient Analyzer Program (ETAP) technology which was used for the simulation. The results obtained from the analysis showcase a wide-ranging single-line diagram for easy implementation; other results obtained include, short circuit analysis carried out on Bus1, Bus2, Bus3, and Bus4 showing the fault levels of these buses to be 8.767MVA, 3.165MVA, 2.626MVA & 2.331MVA respectively and fault protection coordination was observed that at the occurrence of fault on any of the feeders, the affected feeder is isolated from the rest of the system through the fuse protecting that feeder.
Power Flow and Security Analysis in Electrical Transmission System
The power system engineers dire need of extraordinary methods to optimally analyze, monitor and control various elements of such an advanced complicated system that include economic load dispatch, unit commitment, automatic generation control, state estimation and Optimal Power Flow (OPF). It is a static nonlinear problem that optimizes a specific objective function while satisfying a set of physical and operational constraints imposed by equipment restrictions and security requirements. Power system optimization problems are complex and have non-linear characteristics. There are two ways namely conventional and evolutionary methods. The conventional methods require function to be convex and variables as continuous. However, the power system optimization problems do not have these characteristics. Evolutionary optimization methods have become an alternative to conventional optimization techniques for solving real-world problems having non-convexity, non-differentiability and discontinuity. Though the evolutionary methods find suitable solutions to power system problems, premature convergence and stagnation do not use them directly.
Physics in Easy
I developed this textbook for private tuition (A-level and university) and revised it during lectures at various universities of applied sciences. It contains subsequently edited and colored photos of our blackboard pictures and explains the questions that the pupils and students had during the lessons. The book is available in either German or English and contains vocabulary lists for physical terms. With simple language, little text and lots of pictures, the book tries to present content easily. In order to achieve this, I have made it a habit to note down comprehension problems in class and revise the corresponding text passages. Focus of content: Electric circuits, resistors and capacitors, electric fields, magnetic fields, particles in fields, coils, induction, electric motors, alternating current, three-phase current, oscillations, dipole. Level: High school and university entrance. The solutions to the exercises (blackboard photos from the lessons) are provided on my website badelt.de.
Research on Contact Materials for Electromagnetic Relay
Silver tin oxide contact material is widely used in the contacts of electromagnetic relays. Its electrical contact characteristics and reliability theory under various load conditions have always been a research direction that relay manufacturing companies are very concerned about. In order to clarify the failure mechanism of silver tin oxide contact materials under different loads, this paper based on the designed electrical performance simulation experimental system of contact materials, observed the dynamic waveform characteristics of contact closing and breaking, and combined with the durability experiment to point surface topography scanning observation chart, starting from the perspective of arc and material transfer, based on the PSD model, the failure mechanism of the contact material under different loads was studied, and the degradation rules and characteristics of sensitive parameters during the experiment under different load conditions were verified.
Sensorless Control System for Permanent Magnet Synchronous Motor
From the perspective of sensorless control for PMSM, this book analyzes and integrates the two control methods of high-speed and zero-low-speed ranges, to achieve full-speed control. A composite control based on weighted switching method is established, which effectively combines the good dynamic tracking performance of the model reference adaptive control method in the high-speed range and the high-precision control of the pulse injection method in the zero-low-speed range. The intermediate speed range where the two methods transition is controlled by the weighted method. Multiple control strategies are integrated and weighted according to the characteristics of PMSM operation at different speed ranges, ultimately overcoming the limitation of a single sensorless control method not being suitable for the full speed range. The PI structure of the speed adaptive law in the traditional model reference adaptive system will lead to the problems of reduced speed identification accuracy and poor robustness, the super-twisting sliding mode algorithm in the high-order sliding mode algorithm is proposed to improve the PI structure of the speed adaptive law in the traditional model.
Electronics
Electronics is the science that studies how to control electrical energy by electrical means in which electrons play a fundamental role. It is divided into analogue and digital because its working coordinates choose to obey these two ways of presenting the electrical signals to be processed. In a broader definition, we can say that electronics is the branch of science that studies the use of circuits made up of electrical and electronic components, with the main aim of representing, storing, transmitting or processing information, as well as controlling processes and serving mechanisms. From this perspective, it can also be said that the internal circuits of computers (which store and process information), telecommunications systems (which transmit information), various types of sensors and transducers (which represent physical quantities - information - in the form of electrical signals) are all within the area of interest of electronics.
Introduction to the study of light dispersion
In keeping with the mission of scientific researchers, and particularly that of popularizing results in the field of geometrical optics, which is a part of physics.We have chosen the topic "Introduction to the study of light dispersion" in order to help scientific researchers, learners and teachers in this field.Light, which is a physical agent capable of impressing the retina of the eye, would be dispersed by passing through the prism, which is a transparent medium.
Multimachine Stability Analysis Using Swing Dynamics
The swing equation is essential for modelling and analyzing the power system dynamics, after being disturbed. Two types of stability i.e., voltage and power angle stability are considered to be vital in the study stability of power system. Power angle stability is being considered as matter of concern in this work. Power angle stability can be measured by analyzing the dynamics of swing equation. The existence of chaos in swing equation is a fact in power system. Chaos can drive the system power angle into instability, as chaos is a fundamental aspect of a nonlinear dynamical system. Instability can also result in a total shutdown of the system. This work presents a novel approach for stability analysis of multi-machine system using swing curve derived from an equation. The proposed method provides advanced techniques to detect instability in power system using swing dynamics and analyze their impact on stability. It reduces qualitative changes in dynamic systems when parameters vary, leading to shifts in stability and the emergence of new states. The stability and security of power systems are crucial for ensuring reliable electricity supply to consumers.
Portable Primary Current Injector for Circuit Breaker Testing
The primary current injector is a device used for efficient commissioning and maintenance tasks at substations. It brings equipment close to the device under test, automates current control, and requires only one operator. This injector performs various tests, including high-current testing using a secondary pass-through technique. A single conductor passes through the equipment to transmit current to the object being tested, reducing preparation time and eliminating power losses. The digitally generated variable frequency waveform is delivered with precision through a power amplifier, ensuring stable operation despite load and voltage fluctuations.Primary current injection testing is essential for large electrical installations like substations, where it injects high currents directly into systems such as circuit breakers. This test assesses system performance under different current loads, particularly testing over-current trip relays connected to circuit breakers. It simulates real-world conditions to ensure reliable breaker operation, preventing potential catastrophic damage from failures during high-current events.
The Mystery of Electricity
2024 Reprint of the 1934 Edition. Full facsimile of the original edition and not reproduced with Optical Recognition Software. In this short treatise explores the history and future of electricity. The book delves into the early discoveries and experiments with electricity, including the work of Benjamin Franklin and Michael Faraday, as well as the development of electrical technology and its impact on society. The author also provides a philosophical and metaphysical perspective on electricity, exploring its relationship to consciousness, spirituality, and the human experience. He discusses the concept of "electricity of the mind" and the potential for harnessing this energy for personal and collective transformation. The book includes a detailed analysis of the symbolism of electricity in ancient cultures, such as the Egyptian and Greek civilizations, and its use in esoteric traditions like alchemy and Kabbalah. Hall also offers a prophetic vision of the future of electricity, predicting its potential to revolutionize human society and transform the world. Overall The Mystery of Electricity offers a unique and insightful perspective on the nature of electricity and its role in human history and evolution.
Control Technology of High Speed Permanent Magnet Synchronous Motor
Taking high-speed PMSMs as the research object, in-depth study of control system has become an important part of industrial development. The main strategy used in high-speed PMSMs is the vector control system. The rotor position angle is precisely calculated through the control algorithm, thereby improving the operational stability of the system. However, the commonly used mechanical rotor position sensor not only increases the design cost of the vector control system, but also reduces the rotor position observation accuracy and reduces the reliability of the operating system. Using an algorithm to estimate the rotor angle requires the control system to collect accurate three-phase currents, decouple them according to coordinate transformation, and finally estimate the rotor position angle of the permanent magnet synchronous motor by expanding the back electromotive force. Commonly used rotor position detection methods include: sliding mode observer method, model reference adaptive method, and high-frequency signal injection method. For PMSMs with different speeds and different performances, the different algorithms used to observe the rotor position will have different accuracy.
Solar Autoirrigation System Using Soil Moisture Sensor Technology
The main objective of this book was to design a small scale irrigated system that would use water in more well-organized way in order to prevent excess water loss and minimize the cost of labor. The water saving was also an important feature, since there is demand to decrease water loss and to Maximize the efficiency used. The Power consumption must also be monitored. Soil moisture sensors will be placed inside the field, and it will be connected to the microcontroller. The moisture sensor will be continuously sensing the moisture content of the soil and sending it to the microcontroller, where moisture content value will be compared with predefine level. Now whenever the moisture level becomes less than the predefined level, microcontroller will send a command to activate the water pump. Same time microcontroller will activate GSM module, which will send a feedback message to user, stating that the "Pump ON". After the motor gets started and starts supplying water to the field; simultaneously the moisture sensor will be sensing the moisture content and sending the data to the microcontroller.
Practical Exercises - Electromagnetism & Electrical Energy Calculators
After twenty-seven preceding sets of practical exercises laid forward in preceding manuscripts, I have inspired from my core ICT academic and research experience to produce this manuscript. Here, a successive set of 26 cohesively written practical exercises in softwares, directly related to Electromagnetism and Electrical Energy Calculators, is laid forward, in a similar style as in the preceding manuscripts. Such exercises apply better to beginner levels in university courses. Of course, its applicability to advanced level courses may be appreciated by many academicians to their discretion. It is retained here that adaptations of these exercises by academicians to their requirements is very possible. It is recommended for students to devise good/workable summary sheets for each exercise, along with writing proper report and referencing needed. For each exercise, a share of analysis is required to develop thinking and critical/professional abilities. Most exercises are devised for computers/laptops along with currently trending smart phones/tablets. Students must communicate properly with their coach, who in turn, are recommended to perform judicious follow-ups.
Electrical Service Design of a Multipurpose Building Complex
The book discusses the crucial role of electrical service design in installations, covering aspects like lighting, power systems, fire prevention, and security systems. It introduces an efficient approach for a multipurpose building complex, ensuring compliance with standards from reputable institutions. AutoCAD was used for the design, focusing on lighting and power distribution. The study emphasized strategic fixture placement, illumination levels, control systems, and safe electricity transmission. It adhered strictly to wiring regulations, employed accurate lighting calculations, and showcased a well-balanced load system with regulatory-compliant protection measures. Recommendations include energy optimization, developing computer programs, and involving students for skill enhancement and fire hazard mitigation, all under stringent testing and regulatory adherence for error-free and safe installations.
Classical Electrodynamics
Classical Electrodynamics captures Schwinger's inimitable lecturing style, in which everything flows inexorably from what has gone before. This anniversary edition offers a refreshing update while still maintaining Schwinger's voice.The book provides the student with a thorough grounding in electrodynamics in particular, and in classical field theory in general. An essential resource for both physicists and their students, the book includes a Reader's Guide, which describes the major themes in each chapter, suggests a possible path through the book, and identifies topics for inclusion in, and exclusion from, a given course, depending on the instructor's preference.Carefully constructed problems complement the material of the text. Classical Electrodynamics should be of great value to all physicists, from first-year graduate students to senior researchers, and to all those interested in electrodynamics, field theory, and mathematical physics.The original text for the graduate classical electrodynamics course was left unfinished upon Julian Schwinger's death in 1994, but was completed by his former students and co-authors, who have brilliantly recreated the excitement of Schwinger's novel approach. This anniversary edition has been revised by one of those original co-authors, Kimball Milton.
Backyard Blackout
The world as you know it, *might* be ending soon.So prepare yourself now, before it's too late...Turn your backyard into a self-sustaining oasis.And brace yourself for a world without electricity.Introducing: "Backyard Blackout" - the ultimate two-in-one collection. Master self-sufficiency and thrive in a world without power.Authored by Anthony Bennett, this compilation combines "How to Build the Perfect Backyard Homestead" and "How to Survive When the Grid Goes Down" into a single yet powerful volume. You might be a beginner, or you might be a seasoned homesteader. Either way, this collection is your blueprint for a sustainable, resilient, and fulfilling way of life.In "How to Build the Perfect Backyard Homestead," you'll transform your backyard into a thriving homestead. You will: Ensure food security, reduce your carbon footprint, and live harmoniously with natureAcquire practical advice on soil health, composting, and natural fertilizers to kickstart your gardenLearn how to raise chickens and beesPreserve your harvest to ensure you can enjoy the fruits of your labor all year roundIncorporate renewable energy and water management into your homesteadBut what happens when the grid (inevitably) goes down?"Backyard Blackout" doesn't stop at self-sufficiency; it prepares you for survival in a world without power. From "How to Survive When the Grid Goes Down: "Secure and purify waterAcquire and store foodBuild sheltersEnsure personal and property securityStudy psychological preparedness, leadership skills, and first aidAnalyze the importance of community and leadershipSo, what are you waiting for? Your food garden isn't going to plant itself. And the magical electric tooth-fairy isn't going to power up your toaster.Your journey towards self-sufficiency and resilience starts here.Don't wait for the lights to go out-seriously, it sucks. Dive into "Backyard Blackout" and take the first step towards a healthier, happier life.Your homestead (and your future) awaits.Add this book to your cart. Buy this book now.
Backyard Blackout
The world as you know it, *might* be ending soon.So prepare yourself now, before it's too late...Turn your backyard into a self-sustaining oasis.And brace yourself for a world without electricity.Introducing: "Backyard Blackout" - the ultimate two-in-one collection. Master self-sufficiency and thrive in a world without power.Authored by Anthony Bennett, this compilation combines "How to Build the Perfect Backyard Homestead" and "How to Survive When the Grid Goes Down" into a single yet powerful volume. You might be a beginner, or you might be a seasoned homesteader. Either way, this collection is your blueprint for a sustainable, resilient, and fulfilling way of life.In "How to Build the Perfect Backyard Homestead," you'll transform your backyard into a thriving homestead. You will: Ensure food security, reduce your carbon footprint, and live harmoniously with natureAcquire practical advice on soil health, composting, and natural fertilizers to kickstart your gardenLearn how to raise chickens and beesPreserve your harvest to ensure you can enjoy the fruits of your labor all year roundIncorporate renewable energy and water management into your homesteadBut what happens when the grid (inevitably) goes down?"Backyard Blackout" doesn't stop at self-sufficiency; it prepares you for survival in a world without power. From "How to Survive When the Grid Goes Down: "Secure and purify waterAcquire and store foodBuild sheltersEnsure personal and property securityStudy psychological preparedness, leadership skills, and first aidAnalyze the importance of community and leadershipSo, what are you waiting for? Your food garden isn't going to plant itself. And the magical electric tooth-fairy isn't going to power up your toaster.Your journey towards self-sufficiency and resilience starts here.Don't wait for the lights to go out-seriously, it sucks. Dive into "Backyard Blackout" and take the first step towards a healthier, happier life.Your homestead (and your future) awaits.Add this book to your cart. Buy this book now.
Electromagnetic Compatibility of Airborne Antennas Devices
In this monograph, the author makes an attempt to fill gaps in the solution of the problem of spatial decoupling of antennas by means of impedance decoupling structures. He presents the results of research about the electromagnetic fields of aperture antennas located on the common impedance surfaces, and about the development of techniques of synthesis of impedance structures and on their basis, the creation of decoupling devices providing the required electromagnetic compatibility of antennas. On the basis of the method of integral equations we solved the problems of analysis of radiation characteristics of a single antenna in the shape of the open end of a parallel-plate waveguide located on the impedance plane and on the surface of a circular cylinder. A similar problem is solved with the account of a receiving antenna with the same construction. Using the defined variations of distribution of the complete and scattered electromagnetic fields, we developed the techniques of synthesis of impedance decoupling structures for the antennas located on the common impedance plane and circular cylinder. Results of the comparative analysis of theoretical and experimental research.
Maintenance System Using Artificial Intelligence
This book presents a new proposal for load pre-dispatch considering the technical condition of the engines of thermoelectric power plants through the combination of several maintenance and diagnostic techniques based on computational intelligence via Fuzzy logic. The diagnosis of the technical condition of the engines is performed using lubricating oil analysis, vibration analysis, and thermography. With these data and statistical analysis, it is possible to foresee when an engine may fail even in pre-dispatch load. To increase the reliability of the motors and of the electric power supply, the Maintenance Management Program (PGM) was carried out, using management tools, applying only 4 pillars of TPM (total productive maintenance) and combining it with predictive maintenance and diagnostics, thus allowing the management to reduce the corrective shutdowns of the plant's equipment. Some results achieved after implementation are: reduction of annual maintenance cost, reduction of corrective maintenance, increase of MTBF (Mean Time Between Failures).
Teaching Electromagnetism
In the work presented in this book, a didactic sequence was used using resources that go beyond the traditional blackboard and chalk, such as experiments, in other words, teaching a different kind of lesson. The proposal was carried out with students in the third year of secondary school at the Jo瓊o XXIII State College, located in the municipality of Jani籀polis - Paran獺, Brazil. The results related to the process of teaching and learning physics, in particular electromagnetism, were analyzed using lessons based on an approach to the principles of how a telephone/cell phone works, in order to mediate the students' teaching and learning. The application of the sequence was based on interactionism, i.e. the methodological theory of Vygotsky's interactionist approach. This approach highlights the importance of social interaction with more experienced people who can mediate knowledge, contributing to the learning process. This work made it possible to analyze the teaching and learning process through the application of the didactic sequence, as well as the social relationships and experiences lived throughout it.
Book of Physics Anagrams and Puzzles - Book1
Research has shown that students improve their problem-solving skills by working through puzzles, even from infancy. Children love working their way through a jigsaw, and as they watch the big picture emerging, they develop a sense of fulfilment and accomplishments. It is amazing how much students learn from wordsearches and puzzles.The goal is making Physics as a subject more accessible to more students. The path is through anagrams as brain teasers, wordsearches as builders of key vocabulary, crossword puzzles as concept keys, and the mind-maps to create the bigger picture, helping students appreciate why they are learning a topic.It promises to be an exciting journey. Why not start your students on the first step.Bon voyage!
