A computer code has been developed that operates on angular momentum and direction cosine operator products to form a reduced set of lower degree. The program has been used extensively in obtaining the eigenvalues and eigenvectors of the Hamiltonian describing the vibration-rotation levels of triatomic asymmetric rotor molecules. Examples of the use of the program as well as a listing are documented.

The Semitic Languages presents a unique, comprehensive survey of individual languages or language clusters from their origins in antiquity to their present-day forms. The Semitic family occupies a position of great historical and linguistic significance: the spoken and written languages of the Phoenicians, Hebrews and Arabs spread throughout Asia and northern and central Africa; the Old Semitic civilizations in turn contributed significantly to European culture; and modern Hebrew, modern literary Arabic, Amharic, and Tigrinya have become their nations' official languages. The book is divided into three parts and each chapter presents a self-contained article, written by a recognized expert in the field. * I. General Issues: providing an introduction to the grammatical traditions, subgrouping and writing systems of this language family. * II. Old Semitic Languages * III. Modern Semitic Languages Parts II and III contain structured chapters, which enable the reader to access and compare information easily. These individual descriptions of each language or cluster include phonology, morphology, syntax, lexis and dialects. Suggestions are made for the most useful sources of further reading and the work is comprehensively indexed.

DC/AC inversion technology is of vital importance for industrial applications, including electrical vehicles and renewable energy systems, which require a large number of inverters. In recent years, inversion technology has developed rapidly, with new topologies improving the power factor and increasing power efficiency. Proposing many novel approaches, Advanced DC/AC Inverters: Applications in Renewable Energy describes advanced DC/AC inverters that can be used for renewable energy systems. The book introduces more than 100 topologies of advanced inverters originally developed by the authors, including more than 50 new circuits. It also discusses recently published cutting-edge topologies. Novel PWM and Multilevel Inverters The book first covers traditional pulse-width-modulation (PWM) inverters before moving on to new quasi-impedance source inverters and soft-switching PWM inverters. It then examines multilevel DC/AC inverters, which have overcome the drawbacks of PWM inverters and provide greater scope for industrial applications. The authors propose four novel multilevel inverters: laddered multilevel inverters, super-lift modulated inverters, switched-capacitor inverters, and switched-inductor inverters. With simple structures and fewer components, these inverters are well suited for renewable energy systems. Get the Best Switching Angles for Any Multilevel Inverter A key topic for multilevel inverters is the need to manage the switching angles to obtain the lowest total harmonic distortion (THD). The authors outline four methods for finding the best switching angles and use simulation waveforms to verify the design. The optimum switching angles for multilevel DC/AC inverters are also listed in tables for quick reference. Application Examples of DC/AC Inverters in Renewable Energy Systems Highlighting the importance of inverters in improving energy saving and power-supply quality, the final chapter of the book supplies design examples for applications in wind turbine and solar panel energy systems. Written by pioneers in advanced conversion and inversion technology, this book guides readers in designing more effective DC/AC inverters for use in renewable energy systems.