Developing reusable portals for scripted scientific codes

A new portal for running scientific numerical codes on the grid is presented. Particular emphasis is placed on portlet reusability and portability. We find that the JSR-168 standard is adequate for creating portable single portlets. For portals consisting on many portlets we present a simple, portable communication system. For grid-based portlets, coupling to a specific portlet container or service architecture is difficult to avoid. Strategies for avoiding such coupling, and future directions in shared portlet development are outlined