This book provides a comprehensive treatment of the cavitation erosion phenomenon and state-of-the-art research in the field. It is divided into two parts. Part 1 consists of seven chapters, offering a wide range of computational and experimental approaches to cavitation erosion. It includes a general introduction to cavitation and cavitation erosion a detailed description of facilities and measurement techniques commonly used in cavitation erosion studies, an extensive presentation of various stages of cavitation damage (including incubation and mass loss) and insights into the contribution of computational methods to the analysis of both fluid and material behavior. The proposed approach is based on a detailed description of impact loads generated by collapsing cavitation bubbles and a physical analysis of the material response to these loads. Part 2 is devoted to a selection of nine papers presented at the International Workshop on Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction(Grenoble, France, 1-2 March 2011) representing the forefront of research on cavitation erosion. Innovative numerical and experimental investigations illustrate the most advanced breakthroughs in cavitation erosion research. "

The aims of the present study were to development, validation and normalization of mathematics anxiety scales (MAS), as an instrument to measure students' Mathematics anxiety for high schools . By using all of aspects of Mathematics anxiety a primarily questionnaire with 96 item was developed and piloted based on a sample of 2400 students. Data entry was performed using descriptive statistics, exploratory and confirmatory factor analysis and goodness of fit by SPSS and Lisrel soft wears. Analyzing the data extracted two factors for mathematics anxiety as math test anxiety and numerical anxiety. Psychometric properties of reliability and validity have shown significant results and are improved remarkably that this instrument can be considered as a suitable criterion for prospective clinical interventions. The MAS linked a communication gap between students and teachers. Through use of the scale, students, teachers and counselors are able to work together towards improving Mathematics courses and increasing Mathematical literacy.