Se-Alkynyl selenocarboxylates (1) were found to readily react with alcohols and amines to give O-alkyl selenocarboxylates (4) and selenoamides (6) in moderate to good yields, respectively. The formation mechanisms of 4 and 6 via selenoketene and ammonium alkyneselenolate, respectively, are proposed.

A surge-flood coupling model was developed for numerical analysis of the disaster phenomena in river and coastal areas. In the coastal area, the basic equations of storm surge model are the multi-level continuity and momentum equations integrated for each layer. The shear stresses and the pressure gradients are taken into consideration in the momentum equations. A general coordinate system is used due to its advantageous for the modeling the watercourse of complex shape of rivers. In the river areas, the basic equations of flood model are then two dimensional unsteady flow ones. The developed surge-flood coupling model is applied in this study for the analysis of the river current and the water level in the Tokyo Bay.

The INSPECT (Integrated Numerical research System for Prevention and Estimation of Coastal disasTer) system was developed for numerical analysis of oceanographical disaster phenomena in coastal and estuarine areas. The INSPECT consists of three numerical simulation models (Wave, Storm Surge and Tsunami models), their supporting sub-systems and supporting databases. With this system, various coastal protection works can be more reliable designed. The paper presents an outline of the design, basic theory of numerical research and applications of the system. The analysis of tide, Wave, Tsunami and storm surge on the coasts of Shikoku Island in Japan is performed by using INSPECT.

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