Predicting Key Recognition Difficulty in Music Using Statistical Learning Techniques

In this paper, the authors use statistical models to predict the difficulty of recognizing musical keys from polyphonic audio signals. The key recognition difficulty provides important background information when comparing the performance of audio key finding algorithms that often evaluated using different private data sets. Given an audio recording, represented as extracted acoustic features, the authors applied multiple linear regression and proportional odds model to predict the difficulty level of the recording, annotated by three musicians as an integer on a 5-point Likert scale. The authors evaluated the predictions by using root mean square error, Pearson correlation coefficient, exact accuracy, and adjacent accuracy. The authors also discussed issues such as differences found between the musicians' annotations and the consistency of those annotations. To identify potential causes to the perceived difficulty for the individual musicians, the authors applied decision tree-based filtering with bagging. By using weighted naïve Bayes, the authors examined the effectiveness of each identified feature via a classification task

Analyzing the location decisions of agro-industrial investments in Greece

This article examines empirically the factors determining the agro-industrial investments in Greece and their impact on tourism development. Firstly, the determinants influencing the spatial configuration, the socioeconomic forces and the political framework of the agro-industrial investments in Greece are examined theoretically, according to the literature considered by Regional Science. At next, a multi-ordinal regression analysis is applied on the determinants elected theoretically, utilizing statistical data from Greece that describe the period 2004-2008. The results of the analysis are interpreted under the regional developmental perspective, constituting an indirect evaluation of the Greek Developmental Laws 3299/04 and 3522/06, applied by the Government to orientate the developmental dynamics of the agro-industry in Greece. Finally, a further analysis is applied comparing the agro-industrial investments with the tourism dynamics in Greece, indicating a field of policy implementation. Copyright © 2015, IGI Global