SVM wrapper feature selection method for the classification problem, introduced in our previous work [1], is analyzed. The method based on modification of the standard SVM criterion by adding to the basic objective function a third term, which directly penalizes a chosen set of variables. The criterion divides the set of all variables into three subsets: deleted, selected and weighted features....

We present a service-oriented architecture and a set of techniques for developing wrapper code generators, including the methodology of designing an effective wrapper program construction facility and a concrete implementation, called XWRAPComposer. Our wrapper generation framework has two unique design goals. First, we explicitly separate tasks of building wrappers that are specific to a Web s...

This correspondence presents a novel hybrid wrapper and filter feature selection algorithm for a classification problem using a memetic framework. It incorporates a filter ranking method in the traditional genetic algorithm to improve classification performance and accelerate the search in identifying the core feature subsets. Particularly, the method adds or deletes a feature from a candidate ...

Password is the most widely used identity verification method in computer security domain. However, due to its simplicity, it is vulnerable to imposter attacks. One way to add a shield to password is to employ keystroke dynamics, which is a biometric-based approach. Without manual preprocessing to remove noises and outliers resulted from typing inconsistencies, a poor detection accuracy results...

This paper concerns the extraction of semi-structured data from Web pages generated from multiple on-line services. This task is addressed by representing the schemas for semi-structured data and crafting generic wrappers based on the schemas. We introduce a hybrid representation method for schemas of semi-structured data, consisting of a concept hierarchy and a set of knowledge unit frames. A ...

Free condoms provided by the government are often not used by Botswana Defence Force (BDF) personnel due to a perceived unpleasant scent and unattractive wrapper. Formative work with the BDF found that scented condoms and military-inspired (camouflage) wrapper graphics were appealing to personnel. A non-randomized intervention study was implemented to determine whether condom wrapper graphics a...

A Web wrapper is a software application that extracts information from a semi-structured source and converts it to a structured format. While semi-structured sources, such as Web pages, contain no explicitly specified schema, they do have an implicit grammar that can be used to identify relevant information in the document. A wrapper learning system analyzes page layout to generate either gramm...