In this position paper, we describe three user scenarios that benefit from metadata based annotation infrastructure. We explain how a basic annotation schema can be extended to support new scenarios. We also describe and evaluate some other features and modifications that are useful when implementing these scenarios. The most laborious part in the scenarios is the design and implementation of n...

We study a model for language evolution which was introduced by Nowak and Krakauer ([12]). We analyze discrete distance spaces and prove a conjecture of Nowak for all metrics with a positive semidefinite associated matrix. This natural class of metrics includes all metrics studied by different authors in this connection. In particular it includes all ultra-metric spaces. Furthermore, the role o...

Next-generation wireless networks will enable the usage of different network technologies fully transparent to the user. Applications will be able to dynamically adapt to the conditions and technical constraints of the network. This vision requires a dynamic allocation of scarce network resources to different users. This paper presents simulation results from a model of admission control and dy...

Organisations of tomorrow are likely to be places where leaders and staff have an agreed vision of a different kind of workplace and also possess knowledge and skills to achieve that vision. However, many external and internal influences facilitate and obstruct cultural change in organisations. The future culture of an organisation is influenced by the mindsets of present day staff. Scenario an...

Visualization is an important part of the data analysis process. Many researchers, however, do not have access to the resources required to do visualization effectively for large datasets. This problem is illustrated through several user scenarios. To remedy this problem, we propose a Visualization Gateway that provides simplified access to such resources to a broad population of users. The cur...

COPYRIGHT: © 2009 The authors. This is an open access article distributed under the terms of the Creative Commons Attribution 3.0 unported (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

This paper fits within the context of the implementation of the EU Water Framework Directive (WFD) and its emission-immission based approach for river basin management. More particularly, it focuses on the sewer-wastewater treatment-river system. Using an integrated model of various system configurations of a real case study, a scenario analysis is performed by evaluating simulation results acc...

Building on existing work evaluating food-attribute labels, we use data collected in 2010 from a national web-based survey of 1,002 households to examine consumer inferences and valuations of food products promoted as “sustainably produced.” A best-worst scale framework was implemented to identify how consumers de ine “sustainably produced” and their preferences for each of the sustainable farm...

Rapidly increasing urbanization in the world, especially in developing countries, let to increasing urban extents. Rapid urban growth causes to appearance many problems such as wasting environmental resources, inability of providing necessary services for citizens and unplanned growth. Urban mangers and planners need tools for understanding amount and size of future urban growths to prevent the...