Prior user studies in the music information retrieval field have identified different personas representing the needs, goals, and characteristics of specific user groups for a usercentered design of music services. However, these personas were derived from a qualitative study involving a small number of participants and their generalizability has not been tested. The objectives of this study ar...

Abstract Simple random-sampling resolutions of the raven paradox relevantly diverge from scientific practice. We develop a stratified model, yielding better fit and apparently rehabilitating simple random sampling as legitimate idealization. However, neither accommodates second concern, objection potential bias. third model that crucially invokes causal considerations, novel resolution handles ...

Data collection mechanism is a crucial factor for the performance of intrusion detection system (IDS). Simple random sampling and Stratified random sampling techniques of statistics are introduced to the procedure of data collection for IDS, and formulas used to calculate the sample size of packets based on these sampling techniques are presented. The implementation of packets sampling is provi...

Any attempt to assess species abundances must employ a sampling design that balances collection of accurate information for many species with a reasonable sampling effort. To assess the accuracy of commonly used within-site sampling designs for sessile species, we gathered cover data at 2 rocky intertidal locations in Southern California using a high-density point-contact method that maintained...

This paper calls attention to processes of entry into and exit from poverty, and to the resulting rates of replacement or turnover in the poverty population. In addition to the fluctuating income components of labor supply, wages, and employment, movement into and out of poverty is associated with normal life-cycle transitions--marriage, divorce, and remarriage; household departures and formati...

The aim of this study is to determine the obstacles that students face at The University of Jordan when using wireless Internet technology. In addition, the aim of this study is to determine any statistically significant differences in student perceptions of the obstacles faced when employing wireless Internet technology regarding their gender and university educational level. A stratified samp...