Drawing from his 40 years of experience in the field, Greenwood (engineering, Rensselaer Polytechnic) describes the development of vacuum switchgear technology from its earliest origins to the most recent designs now offered by companies around the world. The volume begins with a foundation in the physics of the vacuum arc, in vacuum breakdown, and in the fundamentals of current interruption in vacuum. A chapter on applications spans all devices from contactors through switches and reclosers to power circuit breakers. Maintenance is also addressed. There are four chapters on different aspects of design and another on testing. The chapter on manufacturing concentrates on the interrupter as its manufacture is so entirely different from that required for oil and gas-blast circuit breakers. Thoroughly illustrated. Distributed by INSPEC. Annotation copyright by Book News, Inc., Portland, OR
This paper introduces a simple, frequently and easily updated, close to the data epidemiological model that has been used for near-term forecast and policy analysis. We provide several practical examples of how the model has been used. We explain the epidemic development in the UK, the USA and Brazil through the model lens. Moreover, we show how our model would have predicted that a super infectious variant, such as the delta, would spread and argue that current vaccination levels in many countries are not enough to curb other waves of infections in the future. Finally, we briefly discuss the importance of how to model re-infections in epidemiological models.
Covers the structure, function, and study of cells and their components and is an ideal support volume for a wide range of biology courses. Suggested level: secondary.
Anatomy and Physiology explores the essentials of human structure and function through engaging, generously illustrated activities. Much of the content in the first edition has been revised to include larger diagrams, more photographs, and greater depth of coverage in key areas. Sound biological principles are emphasised throughout, and key interactions between body systems are indicated using annotated introductory figures. Using key examples, students are encouraged to explore each body system within the contexts of disease, medicine and technology, aging, and exercise. The result is a rounded exploration of the functioning human."--Back cover.
Environmental Science introduces students to the Earth's physical and biological systems, and the interactions of humans with these. This revision introduces new content and aligns the workbook to its supporting digital resources. Content developments include updates on the Gulf of Mexico oil spill and the Fukushima Daiichi nuclear disaster, and in-depth coverage of energy extraction issues, pollution, and the wider environmental implications of urban development. The ideal companion to both the APES curriculum and the IB Environmental Systems and Societies"--Back cover.
A fresh approach to the teaching of evolutionary principles at this level. Through a variety of engaging and thought-provoking activities, students are invited to explore and critically evaluate the wealth of evidence for our current understanding of evolution.Topics covered:The Origin and Evolution of LifeMechanisms of EvolutionPatterns of Evolution
Provides students with comprehensive guidelines and highly visual worksheets through which to explore aspects of population genetics and evolution. Suggested level: senior secondary.
Thank you for visiting our website. Would you like to provide feedback on how we could improve your experience?
This site does not use any third party cookies with one exception — it uses cookies from Google to deliver its services and to analyze traffic.Learn More.