the lake urmia and its satellite wetlands have been selected as a demonstration site for the united nations development program / global environment facility / department of environment conservation of iranian wetlands project. this project aims to demonstrate reduction of the major threats of this wetland protected area coordinated through an integrated management plan. a choice experiment was...

the lake urmia and satellite wetlands was selected as a demonstration site for the undp/gef/doe conservation of iranian wetlands project. this project aims to demonstrate reduction of the major threats of this wetland protected area coordinated through an integrated management plan. we developed a choice experiment to examine public preferences and elicit their willingness to pay on improvement...

This paper addresses new questions around media performance as a result of the rise of centralized content portals such as iTunes or MySpace. We first describe the rise of centralized content portals in different media industries, and discuss how these portals are creating a dominant position for themselves by using lock-in strategies. Then we describe the concept of media market performance, a...

Grid Portals, based on standard Web technologies, are increasingly used to provide user interfaces for Computational and Data Grids. However, such Grid Portals do not integrate cleanly with existing Grid security systems such as the Grid Security Infrastructure (GSI), due to lack of delegation capabilities in Web security mechanisms. We solve this problem using an online credentials repository ...

This paper considers the attributes of community portals; questions the sustainability of such portals, and suggests a likely direction that portal evolution may take. The context is that of UK local government portals, over the period from 1999-2004.Research has been undertaken to investigate the extent to which locally deployed UK community portals are capable of supporting citizen services i...

A fundamental aspect of knowledge management is capturing knowledge and expertise created by knowledge workers as they go about their work and making it available to a larger community of colleagues. Technology can support these goals, and knowledge portals have emerged as a key tool for supporting knowledge work. Knowledge portals are single-point-access software systems intended to provide ea...

Research portals are websites that present information about certain research activities and their corresponding results in a structured manner. Institutions like universities, businesses, or governmental organizations use them as knowledge base to identify and communicate “who researches on what” or “where can the relevant information, people, or funds be found”. Furthermore, such portals are ...

The literature about portals or gateways exists in huge volume. However, only a limited number of articles have addressed the topic of knowledge portals applying various concepts of arrangement to organizing the information on the portals. Likewise, not many authors have written about knowledge portals. So, this study helps to understand one such knowledge portal and its features, coverage of s...