**Meet the editor**

Dr. Marco G. Beghi graduated in 1979 in Nuclear Engineering at Politecnico di Milano, Italy. He spent one year at University of California, Los Angeles. In 1984 he became research fellow at the Department of Nuclear Engineering, Politecnico di Milano, and in 2003 associate professor of Condensed Matter Physics. He was member of government bodies of Politecnico: Board of Adminis-

trators and Academic Senate. Presently he is in the Micro- and Nanostructured Materials Laboratory of the Department of Energy, Politecnico. Since 1991 he has been teaching Experimental Physics, Condensed Matter Physics, and Technology of Nuclear Materials, to undergraduate and graduate students of Nuclear and Materials Engineering. His experimental research concerns the physics of materials. He analysed the mechanical behaviour of metals in terms of dislocation dynamics and irreversible thermodynamics. He then worked on thin films and their properties, exploiting Brillouin spectrometry to measure the elastic properties. He co-authored over seventy peer reviewed publications.

Contents

Preface IX

Zi-Gui Huang

**of a Crystal 21** 

Chapter 3 **An Operational Approach to the** 

**Ion-Acoustic Waves 67**  A. H. Khater and M. M. Hassan

Chapter 5 **Acoustic Wave 79**  P. K. Karmakar

> **of Films 125**  Marco G. Beghi

Deli Gao and Qifeng Pan

**Part 1 Theoretical and Numerical Investigations** 

Chapter 1 **Analysis of Acoustic Wave in Homogeneous and** 

V. I. Alshits, V. N. Lyubimov and A. Radowicz

Chapter 4 **Exact Solutions Expressible in Hyperbolic and Jacobi** 

**Part 2 Acoustic Waves as Investigative Tools 123** 

Chapter 6 **Acoustic Waves: A Probe for the Elastic Properties** 

**Acoustic Analogy Equations 49**  Dorel Homentcovschi and Ronald Miles

**Inhomogeneous Media Using Finite Element Method 3** 

Chapter 2 **Topological Singularities in Acoustic Fields due to Absorption** 

**Elliptic Functions of Some Important Equations of** 

Chapter 7 **Evaluation Method for Anisotropic Drilling Characteristics of** 

**the Formation by Using Acoustic Wave Information 147** 

**of Acoustic Waves 1** 
