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While current GISystems (geographic information systems) can represent observational spatial data well, they have limited capabilities in representing some non-observational social elements and goal-driven behaviors that can be important factors in a wide range of geographic issues. Such social elements and behaviors can include laws, regulations, polices,(More)
Collaboratories have been deWned as centers without walls, virtual places where teams of scientists can undertake coordinated research. As part of the Human–Environment Regional Observatory (HERO) infrastructure project, we have been developing a geocollaboratory to support work by geographically distributed scientists about geographic problems. Our speciWc(More)
Finding a least-cost-path in a raster data format is a useful function in geographical information systems. However, existing algorithms are often inadequate for practical roadway planning. This paper improves conventional algorithms by including the considerations of spatial distances, anisotropic costs and the presence of bridges and tunnels in the paths.(More)
Late last month, the Chinese government announced that it will invest four trillion renminbi (US$600 billion) over the next ten years to protect and improve access to water. The policy was spelt out in this year’s No 1 Document — the central government’s first policy document of the year, setting the top priorities — released on 29 January, and comes as a(More)
Remote sensing techniques that provide synoptic and repetitive observations over large geographic areas have become increasingly important in studying the role of agriculture in global carbon cycles. However, it is still challenging to model crop yields based on remotely sensed data due to the variation in radiation use efficiency (RUE) across crop types(More)
Recent natural disasters indicate that modern technologies for environmental monitoring, modeling, and forecasting are not well integrated with cross-level social responses in many hazard-management systems. This research addresses this problem through a Java-based multi-agent prototype system, GeoAgent-based Knowledge System (GeoAgentKS). This system(More)
The Lancet Countdown: tracking progress on health and climate change is an international, multidisciplinary research collaboration between academic institutions and practitioners across the world. It follows on from the work of the 2015 Lancet Commission, which concluded that the response to climate change could be "the greatest global health opportunity of(More)