Claus Frohlich Books

Solar Electromagnetic Radiation Study for Solar Cycle 22

By Claus Frohlich, Judit M. Pap, Roger K. Ulrich

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Measurements of solar irradiance, both bolometric and at various wavelengths, over the last two decades have established conclusively that the solar energy flux varies on a wide range of time scale...

Observing and Modeling Earth s Energy Flows

By Claus Frohlich, Symeon Koumoutsaris, Paul Ingmann, Robert Kandel, Lennart Bengtsson, Richard P. Allan, Jost Heintzenberg, Roger Maurice Bonnet, Norman G. Loeb

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Solar Composition and its Evolution from Core to Corona

By Claus Frohlich, S.K. Solanki, Huber M.

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Solar Electromagnetic Radiation Study for Solar Cycle 22

By Claus Frohlich, Judit M. Pap, Roger K. Ulrich

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Solar Composition and Its Evolution From Core to Corona

By Rudolf Von Steiger, Claus Frohlich, S. K. Solanki, Huber M.

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The Sun as now studied is far removed from its early models that described a homogeneous spherical body: chemical fractionation as well as considerable fine-structure in and above the solar surface...

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.