System Independent


Book Description




Rate-Independent Systems


Book Description

This monograph provides both an introduction to and a thorough exposition of the theory of rate-independent systems, which the authors have been working on with a lot of collaborators over 15 years. The focus is mostly on fully rate-independent systems, first on an abstract level either with or even without a linear structure, discussing various concepts of solutions with full mathematical rigor. Then, usefulness of the abstract concepts is demonstrated on the level of various applications primarily in continuum mechanics of solids, including suitable approximation strategies with guaranteed numerical stability and convergence. Particular applications concern inelastic processes such as plasticity, damage, phase transformations, or adhesive-type contacts both at small strains and at finite strains. A few other physical systems, e.g. magnetic or ferroelectric materials, and couplings to rate-dependent thermodynamic models are considered as well. Selected applications are accompanied by numerical simulations illustrating both the models and the efficiency of computational algorithms. In this book, the mathematical framework for a rigorous mathematical treatment of "rate-independent systems" is presented in a comprehensive form for the first time. Researchers and graduate students in applied mathematics, engineering, and computational physics will find this timely and well written book useful.




Soul of the Grid


Book Description

"I felt like we had failed," said director of grid operations Jim Detmers in a pained voice. "In my mind, I pictured people stranded in elevators. I pictured people stranded in stores and checkout lines. All I could think of was the Inconvenience, and I'm sitting here thinking...thinking, what rock did we not look under to maybe prevent this?" As the focal point of an unprecedented power crisis that has tarnished the Golden State, the California Independent System Operator (California ISO) carries the mixed burden of being a disaster survivor. Established to maintain electrical system reliability for the world's fifth-largest economy, California ISO has been both praised and vilified for its efforts amidst the chaos of blackouts, price volatility, political backlash, and market manipulations by Enron and other ruthless competitors. This book chronicles how the California ISO came to be and what happened during its first five years. More importantly, though, this is the story of the people who make up California ISO and give it an identifiable character and culture--its soul. The result is a very human drama that is otherwise unavailable from the regulatory record or media accounts of California's unparalleled power emergency.




California Independent System Operator


Book Description







Small-Scale Renewable Energy Systems


Book Description

A revolution is ongoing in the field of small-scale energy solutions, which can enable lower impact on the environment, more robust supply and self-determination. Solar power and other forms of renewable energy sources, which you can implement to generate your own electricity, are growing quickly. Electromobility is transforming the car industry and transportation systems and can also play a role in your energy system. Electricity can be used much more efficiently than before, for example by using LED light, variable speed motor drives and efficient home appliances. Smart controls are available, sometimes with free open source software. All this opens up tremendous opportunities for energy independence, which is the focus of this book. The book introduces the reader to a number of renewable energy sources, to different options for storing electricity and to smart use of electricity, particularly in the context of small isolated systems. This is important because many renewable energy sources are weather- and season-dependent and usually require storage and smart control, in order to obtain a system that is completely independent of the electricity grid. In the book, overall system design is explained, including how to combine different sources in a hybrid system. Different system sizes and architectures are also covered. A number of real cases are described, where homes, businesses and communities have achieved a high level of energy independence or are on their way to achieving it. This book will prove useful in university education in renewable energy at bachelor and master level, and also for companies and private individuals, who want to start or expand activities in the area of renewable energy.




The People's Network


Book Description

The Bell System dominated telecommunications in the United States and Canada for most of the twentieth century, but its monopoly was not inevitable. In the decades around 1900, ordinary citizens—farmers, doctors, small-town entrepreneurs—established tens of thousands of independent telephone systems, stringing their own wires to bring this new technology to the people. Managed by opportunists and idealists alike, these small businesses were motivated not only by profit but also by the promise of open communication as a weapon against monopoly capital and for protection of regional autonomy. As the Bell empire grew, independents fought fiercely to retain control of their local networks and companies—a struggle with an emerging corporate giant that has been almost entirely forgotten. The People's Network reconstructs the story of the telephone's contentious beginnings, exploring the interplay of political economy, business strategy, and social practice in the creation of modern North American telecommunications. Drawing from government documents in the United States and Canada, independent telephone journals and publications, and the archives of regional Bell operating companies and their rivals, Robert MacDougall locates the national debates over the meaning, use, and organization of the telephone industry as a turning point in the history of information networks. The competing businesses represented dueling political philosophies: regional versus national identity and local versus centralized power. Although independent telephone companies did not win their fight with big business, they fundamentally changed the way telecommunications were conceived.




Independent Stardom


Book Description

Bringing to light an often-ignored aspect of Hollywood studio system history, this book focuses on female stars who broke the mold of a male-dominated, often manipulative industry to dictate the path of their own careers through freelancing. Runner-up, Richard Wall Memorial Award, Theatre Library Association, 2016 During the heyday of Hollywood’s studio system, stars were carefully cultivated and promoted, but at the price of their independence. This familiar narrative of Hollywood stardom receives a long-overdue shakeup in Emily Carman’s new book. Far from passive victims of coercive seven-year contracts, a number of classic Hollywood’s best-known actresses worked on a freelance basis within the restrictive studio system. In leveraging their stardom to play an active role in shaping their careers, female stars including Irene Dunne, Janet Gaynor, Miriam Hopkins, Carole Lombard, and Barbara Stanwyck challenged Hollywood’s patriarchal structure. Through extensive, original archival research, Independent Stardom uncovers this hidden history of women’s labor and celebrity in studio-era Hollywood. Carman weaves a compelling narrative that reveals the risks these women took in deciding to work autonomously. Additionally, she looks at actresses of color, such as Anna May Wong and Lupe Vélez, whose careers suffered from the enforced independence that resulted from being denied long-term studio contracts. Tracing the freelance phenomenon among American motion picture talent in the 1930s, Independent Stardom rethinks standard histories of Hollywood to recognize female stars as creative artists, sophisticated businesswomen, and active players in the then (as now) male-dominated film industry.




INDEPENDENT METERING SYSTEM WITH ELECTRO-HYDRAULIC CONTROL


Book Description

This book shows an independent metering electro-hydraulic control system involving its flexible hardware layouts, complex software control, representative products and applications. The book includes one chapter introducing the background and motivation of the independent metering electro-hydraulic control system. It also includes one chapter to summarize various hardware layouts involving the utilized hydraulic components and circuits, as well as analyze their advantages and disadvantages. It emphatically consists of four chapters demonstrating the detailed multivariable control strategies from three levels: load, valve and pump, together with fault-tolerant control under the fault condition. It includes a last chapter, in which products of independent metering control valve and their applications in some typical heavy-duty mobile machinery are collective works of reviews illustrative of recent advances. This book is interesting and useful to a wide readership in the various fields of fluid power transmission and control.




System Independent


Book Description

Do you want to be the victim of a system? if not, then be system independent.