National University of Malaysia

About: National University of Malaysia is a education organization based out in Kuala Lumpur, Malaysia. It is known for research contribution in the topics: Population & Heat transfer. The organization has 26593 authors who have published 41270 publications receiving 552683 citations. The organization is also known as: NUM & Universiti Kebangsaan Malaysia.

Selection of Mother Wavelet Functions for Multi-Channel EEG Signal Analysis during a Working Memory Task

Abstract: We performed a comparative study to select the efficient mother wavelet (MWT) basis functions that optimally represent the signal characteristics of the electrical activity of the human brain during a working memory (WM) task recorded through electro-encephalography (EEG). Nineteen EEG electrodes were placed on the scalp following the 10–20 system. These electrodes were then grouped into five recording regions corresponding to the scalp area of the cerebral cortex. Sixty-second WM task data were recorded from ten control subjects. Forty-five MWT basis functions from orthogonal families were investigated. These functions included Daubechies (db1–db20), Symlets (sym1–sym20), and Coiflets (coif1–coif5). Using ANOVA, we determined the MWT basis functions with the most significant differences in the ability of the five scalp regions to maximize their cross-correlation with the EEG signals. The best results were obtained using “sym9” across the five scalp regions. Therefore, the most compatible MWT with the EEG signals should be selected to achieve wavelet denoising, decomposition, reconstruction, and sub-band feature extraction. This study provides a reference of the selection of efficient MWT basis functions.

How Do Weaker States Hedge? Unpacking ASEAN states’ alignment behavior towards China

Abstract: The extant literature on alignment behavior has focused primarily on the macro dimensions, i.e. the typology, manifestations and implications of states’ alignment choices vis-a-vis the great power(s). Relatively few studies have examined the micro aspects of alignment choices. This article attempts to fill in the gap by unpacking the constituent component of weaker states’ alignment decisions, with a focus on ASEAN states’ hedging behavior in the face of a rising China in the post-Cold War era. It contends that the enduring uncertainty at the systemic level has compelled the states to hedge by pursuing contradictory, mutually counteracting transactions of ‘returns-maximizing’ and ‘risk-contingency’ options, which seek to offset the potential drawbacks of one another, as a way to project a non-taking-sides stance while keeping their own fallback position at a time when the prospect of power structure is far from clear.

Job satisfaction and organisational citizenship behaviour: An empirical study at higher learning institutions

Abstract: This study is designed to measure the two dimensions of organisational citizenship behaviour (i.e., OCBI and OCBO) and to examine how these organisational citizenship behaviours are related to the two facets of job satisfaction (intrinsic and extrinsic). To achieve the research objectives, the survey method is employed. Findings of this study reveal that both extrinsic and intrinsic job satisfaction are very important in predicting citizenship behaviour. Implications and limitations of the study are discussed along with suggestions for future research.