Techniques For Protecting Overhead Lines In Winter Conditions
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Techniques for Protecting Overhead Lines in Winter Conditions
This book offers a comprehensive review of the various options for improving the performance of overhead power lines in winter conditions, taking into account both mechanical and electrical aspects. Experience within the CIGRE community reveals many strategies to protect overhead power lines from damage caused by heavy build-up of ice and snow or electrical issues such as insulator icing flashovers. The initial approach is to consider the predicted ice loads from the available databases. This is supplemented with some fundamental aspects of icing physics that affect accretion rate as well as factors in ice shedding on traditional (metal, ceramic) and novel treated surfaces. These ice physics concepts structure the ways to categorize and evaluate methods to reduce or prevent icing on conductors and ground wires or to prevent flashover of insulators. Many utilities in cold climate regions have developed and used methods and strategies to reduce ice loads using anti-icing (AI) and / or de-icing (DI) methods. In general, AI methods are used before or early during ice build-up, while DI methods are activated during and sometimes after ice build-up. The book describes and discusses some historical, operational, or potential AI / DI systems in the ice physics context. This supports a comprehensive review of AI coatings including concepts, relevant material properties, application methods, and finally test methods for characterizing the long-term performance.
Integrating Disaster Science and Management
Integrated Disaster Science and Management: Global Case Studies in Mitigation and Recovery bridges the gap between scientific research on natural disasters and the practice of disaster management. It examines natural hazards, including earthquakes, landslides and tsunamis, and uses integrated disaster management techniques, quantitative methods and big data analytics to create early warning models to mitigate impacts of these hazards and reduce the risk of disaster. It also looks at mitigation as part of the recovery process after a disaster, as in the case of the Nepal earthquake. Edited by global experts in disaster management and engineering, the book offers case studies that focus on the critical phases of disaster management. - Identifies advanced techniques and models based on natural disaster science for forecasting disasters and analyzing risk - Offers a holistic approach to the problem of disaster management, including preparation, recovery, and resilience - Includes coverage of social, economic, and environmental impacts on disasters
The Ultimate Guide to U.S. Army Survival Skills, Tactics, and Techniques
Author: U.S. Department of the Army
language: en
Publisher: Skyhorse Publishing Inc.
Release Date: 2007-09-17
Here for the first time in one place is everything you will ever need to know in order to survive just about any difficult or dangerous situation. Drawing from dozens of the U.S. Army's official field manuals, editor Jay McCullough has culled a thousand pages of the most useful and curious tidbits for the would-be soldier, historian, movie-maker, writer, or survivalist—including techniques on first aid; survival in the hottest or coldest of climates; finding or building life-saving shelters; surviving nuclear, biological, and chemical attacks; physical and mental fitness, and how to find food and water anywhere, anytime. With hundreds of photographs and illustrations showing everything from edible plants to rare skin diseases of the jungle, every page reveals how useful Army knowledge can be.