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The aim of this paper is to review the optical properties of tellurite glasses doped by erbium and describe their bibliometric study about it. The research documents on of optical properties of tellurite glasses doped by erbium in the Scopus database are 115, start from 1999 until now. The visualization of the research assisted by VOSviewer software. There are three clusters: (1) red cluster for the optical properties begin from the fabrication process until the characterization of glasses based on the geometrical optics phenomena, (2) green cluster for the emission spectra until the analysis using McCumbers Theory, and (3) erbium-doped tellurite glasses optical properties based on energy transfer and XRD analysis on the blue cluster. Based on the Scopus documents, not too many researchers are concerned with researching erbium-doped tellurite glasses, never more than 12 documents per year. However, the researchers are consistent to explore further exploring the characteristics of the optical properties of glass exposed to erbium ion for laser applications.The research funding shows that the tellurite glasses doped by erbium are being developed for laser applications.

The aim of this study was to examine the influence of demographic factors on cognitive ability (memory and attention) among hearing-impaired students. Data from 163 hearing-impaired students were collected using simple random sampling at five polytechnics in Malaysia. The Cambridge Neuropsychological Test Automated Battery (CANTAB) software were utilised to examine cognitive ability (memory and attention). Demographic factors consist of gender, hearing aid usage and parents’ hearing status. The results revealed that attention and memory differed according to hearing aid usage and parent’s status of hearing. No significant differences were found for memory and attention according to hearing-impaired gender. The findings of this study will enable the education authority to direct these special students in a way that best suits the institution and students goals.

This paper explores the relationship between emotional intelligence and psychological well-being among hearing-impaired students. Emotional intelligence consists of five dimensions namely intrapersonal, interpersonal, adaptability, stress management and general mood. A total of 130 hearing-impaired students were chosen as participants via simple random sampling at four polytechnics in Malaysia. The Bar-On Emotional Quotient: Short (EQ-i: S) and Ryff‘s Psychological Well-Being instruments were utilised to measure emotional intelligence and psychological well-being. It was found that in general, hearing impaired students have moderate emotional intelligence level and psychological well-being. Results also found that intrapersonal, interpersonal and adaptability dimensions correlated significantly with psychological well-being. No correlations were found between stress management and general mood dimensions with psychological well-being. Though limited by their ability to speak and to hear, emotional intelligence among hearing-impaired students does play a role in enhancing their individual capability to learn and to experience positive psychological well-being in life.