The text discusses advancements in noise measurement and analysis, including transfer noise, transfer matrix methods, and uncertainty in sound power levels. It covers data processing techniques such as sound field analysis, comparing sound intensity measurements, and coherence techniques in industrial environments. Additional topics include coherence measurement in diesel engines, experimental modal analysis, and the use of finite elements in identifying fluctuating noise sources. The text also mentions progress toward international standards for aircraft contour calculations and noise regulations in various countries. The book "Introduction to Applied Mathematics" by G. Strang is reviewed positively, highlighting its engaging style and comprehensive coverage of applied mathematics. It discusses topics such as symmetric linear systems, equilibrium equations, continuous equilibrium, analytical methods, numerical methods, initial value problems, networks and graphs, and linear programming. The reviewer recommends the book for its clarity and relevance to modern applied mathematics, though suggests additional topics like transfer matrices and finite elements could be included. Another book, "Advanced Mechanics of Materials," is praised for its thorough coverage of stress-strain relationships, energy methods, failure criteria, and applications in mechanics of materials. It includes a chapter on finite elements and computer programs, and covers topics such as torsion, bending, shear center, curved beams, and beams on elastic foundations. The book is noted for its integration of traditional and modern methods in engineering.The text discusses advancements in noise measurement and analysis, including transfer noise, transfer matrix methods, and uncertainty in sound power levels. It covers data processing techniques such as sound field analysis, comparing sound intensity measurements, and coherence techniques in industrial environments. Additional topics include coherence measurement in diesel engines, experimental modal analysis, and the use of finite elements in identifying fluctuating noise sources. The text also mentions progress toward international standards for aircraft contour calculations and noise regulations in various countries. The book "Introduction to Applied Mathematics" by G. Strang is reviewed positively, highlighting its engaging style and comprehensive coverage of applied mathematics. It discusses topics such as symmetric linear systems, equilibrium equations, continuous equilibrium, analytical methods, numerical methods, initial value problems, networks and graphs, and linear programming. The reviewer recommends the book for its clarity and relevance to modern applied mathematics, though suggests additional topics like transfer matrices and finite elements could be included. Another book, "Advanced Mechanics of Materials," is praised for its thorough coverage of stress-strain relationships, energy methods, failure criteria, and applications in mechanics of materials. It includes a chapter on finite elements and computer programs, and covers topics such as torsion, bending, shear center, curved beams, and beams on elastic foundations. The book is noted for its integration of traditional and modern methods in engineering.