Optical Fiber Current and Voltage Sensors is the first book to provide a complete, comprehensive and up to date treatment of the domain of fiber optic and polarimetric sensors, covering fundamental operating principles, characteristics, and construction. Written by one of the most recognised experts in polarimetric sensing, Optical Fiber Current and Voltage Sensors begins by covering the fundamentals of polarized light, as well as essential sensor components. The author then goes on to outline various sensor types and their applications, with a focus on sensors for electric phenomena. The chapters then lay out the demands that sensors need to meet, the technical obstacles and limitations which need to be considered. The book also covers comparisons to corresponding traditional instruments, as well as covering alternative non-conventional sensors. This book will be of interest to a broad audience of prospective readers ranging from graduate research students, to researchers in physics and engineering fields, to industry professionals active in the field who wish to learn about the technology and/or are interested in the development of new commercial solutions based on polarimetric-type fiber sensing as well as their use for high voltage current and voltage sensing.
This book conveys the theoretical and experimental basics of a well-founded measurement technique in the areas of high DC, AC and surge voltages as well as the corresponding high currents. Additional chapters explain the acquisition of partial discharges and the electrical measured variables. Equipment exposed to very high voltages and currents is used for the transmission and distribution of electrical energy. They are therefore tested for reliability before commissioning using standardized and future test and measurement procedures. Therefore, the book also covers procedures for calibrating measurement systems and determining measurement uncertainties, and the current state of measurement technology with electro-optical and magneto-optical sensors is discussed.
This textbook covers Plant Ecology from the molecular to the global level. It covers the following areas in unprecedented breadth and depth: - Molecular ecophysiology (stress physiology: light, temperature, oxygen deficiency, drought, salt, heavy metals, xenobiotica and biotic stress factors) - Autecology (whole plant ecology: thermal balance, water, nutrient, carbon relations) - Ecosystem ecology (plants as part of ecosystems, element cycles, biodiversity) - Synecology (development of vegetation in time and space, interactions between vegetation and the abiotic and biotic environment) - Global aspects of plant ecology (global change, global biogeochemical cycles, land use, international conventions, socio-economic interactions) The book is carefully structured and well written: complex issues are elegantly presented and easily understandable. It contains more than 500 photographs and drawings, mostly in colour, illustrating the fascinating subject. The book is primarily aimed at graduate students of biology but will also be of interest to post-graduate students and researchers in botany, geosciences and landscape ecology. Further, it provides a sound basis for those dealing with agriculture, forestry, land use, and landscape management.
Although the first Agro-Food products based on modem biotechnology (e. g. recombinant chymosin for cheese production; tomato puree based on genetically engineered tomatoes; herbicide-resistant, genetically modified soybean; insect resistant maize) have been introduced in the EU markets in recent years, the application of this technology is still being intensively discussed in the European Union. Recent opinion polls indicate as well that consumers' acceptance of genetically engineered food and agro-products still is relatively low (e. g. European Commission 1997, Hampel et al. 1997), at least in some member states of the EU. In contrast, representatives from politics and industry underline the necessity to apply modem biotechnology in the Agro-Food sector as well, mainly to ensure the competitiveness of EU agriculture and food industry and for employment reasons. Against this background there seems to be a need for a scientific analysis of the future impacts of modem biotechnology in the Agro-Food sector of the EU. Recent studies trying to analyse this issue (e. g. OECD 1992, Teuber 1992) usually comprise extrapolations of status-quo analyses. What has not been exploited so far in this context are systematic technology forecasting approaches which do not include only one single country, but get information on an international level. Therefore, the impacts of modem biotechnology on the Agro-Food sector in five member countries of the EU (Germany, Greece, Italy, the Netherlands, and Spain) have been analysed with the help of the Delphi methodology which represents one of the most reliable tools for technology forecasting.
Equipment to be installed in electric power-transmission and distribution systems must pass acceptance tests with standardized high-voltage or high-current test impulses which simulate the stress on the insulation caused by external lightning discharges and switching operations in the grid. High impulse voltages and currents are also used in many other fields of science and engineering for various applications. Therefore, precise impulse-measurement techniques are necessary, either to prevent an over- or understressing of the insulation or to guarantee the effectiveness and quality of the application. The target audience primarily comprises engineers and technicians but the book may also be beneficial for graduate students of high-voltage engineering and electrical power supply systems.
Optical Fiber Current and Voltage Sensors is the first book to provide a complete, comprehensive and up to date treatment of the domain of fiber optic and polarimetric sensors, covering fundamental operating principles, characteristics, and construction. Written by one of the most recognised experts in polarimetric sensing, Optical Fiber Current and Voltage Sensors begins by covering the fundamentals of polarized light, as well as essential sensor components. The author then goes on to outline various sensor types and their applications, with a focus on sensors for electric phenomena. The chapters then lay out the demands that sensors need to meet, the technical obstacles and limitations which need to be considered. The book also covers comparisons to corresponding traditional instruments, as well as covering alternative non-conventional sensors. This book will be of interest to a broad audience of prospective readers ranging from graduate research students, to researchers in physics and engineering fields, to industry professionals active in the field who wish to learn about the technology and/or are interested in the development of new commercial solutions based on polarimetric-type fiber sensing as well as their use for high voltage current and voltage sensing.
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