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      • Guangdong Petrel Electronic & Audio-Visual Publishing House

        Founded in 1996 as an affiliate of Southern Publishing & Media Co.Ltd.(SPM),Guangdong Petrel Electronic & Audio-Visual Publishing House (PEPH) has now become an all-media publisher specializing in online publishing, as well as creating, publishing and distributing audio-visual products, electronic reading materials, and books,etc.                                                                               PEPH has designed and produced lots of electronic &audio-visual publications and hundreds of books related to social,science,education,language,science and technology, culture,art,among which several series of books were oriented toward international copyright exchanges.                                                                                                             Till now, PEPH has already established cooperative relationships with publishers from South-East Asia and North America, totally exporting more than 200 titles.

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      • Environmental monitoring
        April 2023

        Building Biology Measurement on EMF

        Basics of Field Theory, Practice of Field Measurement Techniques

        by Martin H. Virnich

        The teaching of well-founded, practice-oriented EM field measurement technology on a scientific basis is the central concern of Dr.-Ing. Martin H. Virnich's book. In an easily understandable form and without "higher" mathematics, the author clearly presents the fundamentals of field theory in a depth necessary for practice. Core topics of his book are the following aspects: Physics of EM fields, Measurement of vector fields, Alternating electric fields (low frequency and DC fields), Alternating magnetic fields (low frequency and DC fields), Electromagnetic waves (high frequency), "Dirty Power", as well as The alteration of the natural EMF spectrum and its consequences. New to this 2nd edition is a detailed section on 5G NR, which deals with the current mobile communications standard and its many manifestations. In doing so, it dispels a number of myths surrounding 5G.

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