1.

Record Nr.

UNINA9910154748403321

Autore

Griffiths Phillip A.

Titolo

Differential Systems and Isometric Embeddings.(AM-114), Volume 114 / / Gary R. Jensen, Phillip A. Griffiths

Pubbl/distr/stampa

Princeton, NJ : , : Princeton University Press, , [2016]

©1987

ISBN

1-4008-8210-9

Descrizione fisica

1 online resource (241 pages) : portrait

Collana

Annals of Mathematics Studies ; ; 336

Disciplina

515.3/53

Soggetti

Exterior differential systems

Differential equations, Partial

Embeddings (Mathematics)

Riemannian manifolds

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Nota di bibliografia

Includes bibliographical references and index.

Nota di contenuto

Frontmatter -- Contents -- Preface -- Commonly used notation -- 1. Introduction -- 2. Structure equations of Xn ⊂ EN -- 3. Pfaffian differential systems -- 4. Quasi-linear Pfaffian differential system -- 5. The isometric embedding system -- 6. The characteristic variety -- 7. Isometric embeddings of space forms -- 8. Embedding Cauchy-Riemann structures -- References -- Index

Sommario/riassunto

The theory of exterior differential systems provides a framework for systematically addressing the typically non-linear, and frequently overdetermined, partial differential equations that arise in differential geometry. Adaptation of the techniques of microlocalization to differential systems have led to recent activity on the foundations of the theory; in particular, the fundamental role of the characteristic variety in geometric problems is now clearly established. In this book the general theory is explained in a relatively quick and concrete manner, and then this general theory is applied to the recent developments in the classical problem of isometric embeddings of Riemannian manifolds.



2.

Record Nr.

UNINA9910346904403321

Autore

Utz Annika

Titolo

The Electrochemical Oxidation of H2 and CO at Patterned Ni Anodes of SOFCs

Pubbl/distr/stampa

KIT Scientific Publishing, 2011

ISBN

1000023286

Descrizione fisica

1 online resource (XI, 144 p. p.)

Collana

Schriften des Instituts für Werkstoffe der Elektrotechnik, Karlsruher Institut für Technologie / Institut für Werkstoffe der Elektrotechnik

Soggetti

Technology: general issues

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Sommario/riassunto

In this work, a deeper understanding of the electrochemical oxidation at SOFC anodes was gained by the experimental characterization of patterned Ni anodes in H2-H2O and CO-CO2 atmosphere. By high resolution data analysis, the Line Specific Resistance attributed to charge transfer and its dependencies on gas composition, temperature and polarization voltage were identified. Furthermore, the comparison of the performance of patterned and cermet anodes was enabled using a transmission line model.