This paper concerns the cubic smoothing spline approach to nonparametric regression. After first deriving sharp asymptotic formulas for the eigenvalues of the smoothing matrix, the paper uses these formulas to investigate the efficiency of different selection criteria for choosing the smoothing parameter. Special attention is paid to the generalized maximum likelihood (GML), Cp and extended exp...

Geographic Information System (GIS) based on Internet as a promising research field brings new opportunities and challenges to geographic information accessing, sharing and disseminating. However, the inherent limitation of current Internet GIS architecture based on connection makes it incompetent to fulfil various requirements of GIS applications under dynamic, complicated and distributed comp...

Since 2001, we develop specifications and tools for creating and deploying rich-media content. Our GLIFOS Markup Language (GML) is an XML-based specification that separates the content (videos, transcriptions, slides) from the rendering of the rich-media player. Using our tools, the University Francisco Marroquín (UFM, Guatemala) has created and hosts an online library of over 300 hours of enri...

Most object based approaches to Geographical Information Systems (GIS) have concentrated on the representation of geometric properties of objects in terms of fixed geometry. In our road traffic marking application domain we have a requirement to represent the static locations of the road markings but also enforce the associated regulations which are typically geometric in nature. For example a ...

Long-chain bases are present in the oral cavity. Previously we determined that sphingosine, dihydrosphingosine, and phytosphingosine have potent antimicrobial activity against oral pathogens. Here, we determined the cytotoxicities of long-chain bases for oral cells, an important step in considering their potential as antimicrobial agents for oral infections. This information would clearly help ...

by LIANG ZOU (Under the Direction of Xiaobai Yao) ABSTRACT The development of geographic information system (GIS) is accomplished by increasing popularity of Internet GIS. However, currently most commercial Web GIS applications use proprietary data sets and employ raster images to disseminate maps. The traditional method of Web GIS lacks interoperability, efficiency and quality. To overcome the...

The evolution of open standards and especially those pertaining to the family of XML technologies, have a considerable impact on the way the Geomatics community addresses the acquisition, storage, analysis and display of spatial data. The most recent version of the GML specification enables the merging of vector and raster data into a single ‘‘open’’ format. The notion of ‘‘coverage’’ as descri...

Entity linking (EL) is the task of linking a textual named entity mention to a knowledge base entry. Traditional approaches have addressed the problem by dividing the task into separate stages: entity recognition/classification, entity filtering, and entity mapping, in which different constraints are used to improve the system’s performance. Nevertheless, these constraints are executed separate...