Author: Kate Saunders

Publisher: Scholastic Fiction

ISBN: 1407153749

Category: Juvenile Fiction

Page: 288

View: 5445


When Flora's parents pack her off to boarding school, they have no idea that the train will take her back to 1935. Flora's having the time of someone else's life! But why has she ended up there?

Beswitched NE

Author: Kate Saunders

Publisher: N.A

ISBN: 9781407196510


Page: 288

View: 7461


When Flora Fox's parents send their daughter off to boarding school, they have no idea that the train will take her back to 1935. On the journey Flora has a strange dream. She wakes up without her laptop or her phone, wearing a hideous uniform with ridiculous bloomers underneath. She is a new girl at St Winifred's, where the rules are mad, the food horrible, and the hairiness of the teachers unbelievable. Her 21st century manners will not be tolerated at strict St Win's - how will she ever survive and find her way back to her own time? But there is a special reason why Flora has been summoned to the past. It involves the tempestuous girl who becomes her best friend...
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Hierarchical Protection for Smart Grids

Author: Jing Ma,Zengping Wang

Publisher: John Wiley & Sons

ISBN: 1119304830

Category: Technology & Engineering

Page: 472

View: 4006


A systematic view of hierarchical protection for smart grids, with solutions to tradition protection problems and complicated operation modes of modern power systems • Systematically investigates traditional protection problems from the bird’s eye view of hierarchical protection • Focuses on multiple variable network structures and complicated operation modes • Offers comprehensive countermeasures on improving protection performance based on up-to-date research

Digital Computer Applications to Process Control

Proceedings of the 7th IFAC/IFIP/IMACS Conference, Vienna, Austria, 17-20 September 1985

Author: M. Paul

Publisher: Elsevier

ISBN: 1483298132

Category: Science

Page: 616

View: 5645


Considers the application of modern control engineering on digital computers with a view to improving productivity and product quality, easing supervision of industrial processes and reducing energy consumption and pollution. The topics covered may be divided into two main subject areas: (1) applications of digital control - in the chemical and oil industries, in water turbines, energy and power systems, robotics and manufacturing, cement, metallurgical processes, traffic control, heating and cooling; (2) systems theoretical aspects of digital control - adaptive systems, control aspects, multivariable systems, optimization and reliability, modelling and identification, real-time software and languages, distributed systems and data networks. Contains 84 papers.

Selling the True Time

Nineteenth-century Timekeeping in America

Author: Ian R. Bartky

Publisher: Stanford University Press

ISBN: 9780804738743

Category: Science

Page: 310

View: 1162


This first comprehensive, scholarly history of timekeeping in America studies the transition from local to national timekeeping, a process that led to Standard Time—the worldwide system of timekeeping by which we all live. The book describes the contributions of the railroad industry, university astronomers, clockmakers, and civil and electrical engineers.

Energy Options Impact on Regional Security

Author: Frano Barbir,Sergio Ulgiati

Publisher: Springer

ISBN: 9048195659

Category: Technology & Engineering

Page: 382

View: 3620


Energy appears to be a fundamental driving force of economic and political strategies as well as planetary stability. Energy-related issues such as (1) the availability of new energy sources and viable technologies, (2) the disparity in access to energy sources, (3) the role of energy in our societies (energy societal metabolism), (4) the energy support to the life of our cities (where about half of world population is going to live very soon), and (5) the energy demand for food security all over the world, are “hot” problems that humans will have to face within the framework of sustainability (ecologically sound production and consumption patterns associated with socially acce- able life styles), in terms of policies, technological development and economic processes. A coherent energy strategy is required, addressing both energy supply and demand, security of access, development problems, equity, market dynamics, by also taking into account the whole energy lifecycle including fuel production, transmission and distribution, energy conversion, and the impact on energy equipment manufacturers and the end-users of energy systems. Issues of energy efficiency and rebound effect must also be taken into proper account. In the short term, the aim should be to achieve higher energy efficiencies and increased supply from local energy sources, in particular renewable energy sources.

Electrical Machines & Drives

Author: P. Hammond

Publisher: Elsevier

ISBN: 148329336X

Category: Technology & Engineering

Page: 369

View: 9186


Containing approximately 200 problems (100 worked), the text covers a wide range of topics concerning electrical machines, placing particular emphasis upon electrical-machine drive applications. The theory is concisely reviewed and focuses on features common to all machine types. The problems are arranged in order of increasing levels of complexity and discussions of the solutions are included where appropriate to illustrate the engineering implications. This second edition includes an important new chapter on mathematical and computer simulation of machine systems and revised discussions of unbalanced operation, permanent-magnet machines and universal motors. New worked examples and tutorial problems have also been added.

Fiber-Optic Communication Systems

Author: Govind P. Agrawal

Publisher: John Wiley & Sons

ISBN: 0470922826

Category: Science

Page: 626

View: 1218


This book provides a comprehensive account of fiber-optic communication systems. The 3rd edition of this book is used worldwide as a textbook in many universities. This 4th edition incorporates recent advances that have occurred, in particular two new chapters. One deals with the advanced modulation formats (such as DPSK, QPSK, and QAM) that are increasingly being used for improving spectral efficiency of WDM lightwave systems. The second chapter focuses on new techniques such as all-optical regeneration that are under development and likely to be used in future communication systems. All other chapters are updated, as well.