The RBF Hyperparameter in Metamodel-Assisted Evolutionary Search

RBF metamodels, which are commonly used in expensive optimization problems, rely on a hyperparameter which affects their prediction. The optimal hyperparameter value is typically unknown and hence needs to be estimated by additional procedures. As such this study examines if this overhead is justified from an overall search effectiveness perspective, namely, if changes in the hyperparameter yield significant performance differences. Analysis based on extensive numerical experiments shows that changes are significant in functions with low to moderate multimodality but are less significant in functions with highly multimodality.

Determinants of Web Search Effectiveness from the Perspective of Library and Information Science Students

This study examined an empirical analysis of the determinants of library and information science students’ web search effectiveness at the University of Ilorin, Nigeria. A total enumerative method was used where the entire 146 year three and four undergraduate students of the Department of Library and Information Science represent the sample. Through a survey approach, a questionnaire was developed and used for the collection of data. Three research questions were developed to guide the study. The results demonstrate that determinants such as internet and computer self-efficacy, information literacy skills, use of Boolean operators and use of appropriate search terms significantly correlate with and determine web search effectiveness.

Determinants of Web Search Effectiveness From the Perspective of Library and Information Science Students

This study examined an empirical analysis of the determinants of library and information science students’ web search effectiveness at the University of Ilorin, Nigeria. A total enumerative method was used where the entire 146 year three and four undergraduate students of the Department of Library and Information Science represent the sample. Through a survey approach, a questionnaire was developed and used for the collection of data. Three research questions were developed to guide the study. The results demonstrate that determinants such as internet and computer self-efficacy, information literacy skills, use of Boolean operators and use of appropriate search terms significantly correlate with and determine web search effectiveness.