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Possession in Nineteenth-Century American Novels of the Sea : The Narrative of Arthur Gordon Pym of Nantucket and Moby-Dick
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Communicative Grammar Tasks : Using Paper-based Tasks and Its Relationship with e-Learning
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Highly Accurate Perturbative Method for Webster's Horn Equation
Get PDFApplying mathematical and quantum mechanical techniques, this study develops numerical solutions to Webster's horn equation, which describes the sound inside brass instruments in acoustics. The wavenumbers and wave functions of the modes in the system are evaluated by perturbation theory, assuming a solvable system with relatively small perturbations. An obvious solvable example is a straight pipe, whose wavenumbers can be perturbed by varying the radius of the horn. Maintaining the second-order corrections, the method generated astonishingly accurate results for varying horn shapes. Moreover, in tests of various pipe shapes, the perturbation method required far fewer computational resources than the finite element method. Two analytically solvable shapes and two non-solvable models (one of them is a periodic shape described by a trigonometric function) are analyzed. The results imply the applicability of the method to highly non-solvable systems.departmental bulletin pape
Matters of Borrowing in Kagamigusa : Focusing on the Comparison with Tekkitsuroku
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On the Possibility and Difficulty of Multi-Cultures Society : A Case Study of Social History of Vienna
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Construction of Contracts and the Fundamental Theories of Contract Law, No. 4
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“Ottepel” and Soviet Historical Science : Activity of the Journal Voprosy Istorii between 1953 and 1956
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