LiDAR technology can provide very detailed and highly accurate geospatial information on an urban scene for the creation of Virtual Geographic Environments (VGEs) for different applications. However, automatic 3D modeling and feature recognition from LiDAR point clouds are very complex tasks. This becomes even more complex when the data is incomplete (occlusion problem) or uncertain. In this pa...

With the development of computer science, communications technology and environmental modeling, virtual geographic environments (VGEs) have been linked with field observations and geographic modeling. VGEs enable researchers in various fields to collaboratively perform computer-aided geographic experiments. This study proposes a collaborative environment to conduct a virtual flood experiment th...

VGE geographic knowledge refers to the abstract and repeatable geo-information which is related to the geo-science problem, geographical phenomena and geographical laws supported by VGE. That includes expert experiences, evolution rule, simulation processes and prediction results in VGE. This paper proposes a conceptual framework for VGE knowledge engineering in order to effectively manage and ...

This paper describes the development of a variety of computer-based assessment opportunities, both formative and summative, that are available to a large first year biology class at The University of Sydney. These materials include: weekly quizzes; a mock exam; quiz sections in tutorials; and special self-assessment modules (SAMs). The weekly quiz is password protected and secure but the remain...

Two methods of grid based and image based modeling were put forward respectively to represent the landform of watersheds on the Loess Plateau, China. Many kinds of spatial data such as Digital Elevation Model (DEM), Remote Sensing (RS) images, and photos are utilized to establish the digital 3-D terrains of watersheds on the Loess Plateau, which provides 3-D virtual geographic environments for ...

Standing Committee of the House of Commons, are based upon urban needs and either misunderstand or ignore the rural problem. How acute that problem is and how gravely it affects the health of village dwellers is significantly indicated by the answers to a questionnaire that has been sent by the Leicestershire Health Insurance Committee to the panel doctors in the county. From the replies to the...

not only a very common disease, but that there is evidence of its increasing at a rapid rate, as can be testified b}T all practitioners, as well as by the statistics from hospitals. At one time it was believed that its depredations were confined to city life on account of confined and poisonous atmosphere incidental to town life, but any one who has experience of people living in villages, will...

I was called on to see a newly-born female child on 29th June, 1942, who did not pass urine since her birth on the 24th. On examination the vulva was found much congested; thick muco-purulent discharge could be noticed escaping from the external urethral orifice; and the parts round about the external urethral orifice appeared to be sloughing. Enquiry did not show the mother as suffering from a...