Fitting Technology To The Mathematics Pedagogy: Its Effect On Students Academic Achievement

Taking advantage of students passion in using technology in the form of digital media sets the trend of this study. If this passion can be harnessed, digital media may have an important and powerful role to play in education. A methodology of teaching using digital media in the form of VCD is experimented and tested for possible effect on students academic achievement. With Gagnes nine-instructional events as guide in the pedagogical process, the researcher implemented Self-study video (SSV) in teaching College Algebra to twenty-one (21) tertiary students of University of the East. Two groups of students are used as subject, one taught using the traditional method and the other taught by the Self-study video method. It is the purpose of this study to compare the academic achievement of the two groups of students and determine their perception as regards their learning experience in the SSV in terms of Level of Discussion, Level of Demonstration, Viewing Experiences and Level of Effectiveness

The Sunyaev-Zel'dovich temperature of the intracluster medium

The relativistic Sunyaev-Zel'dovich (SZ) effect offers a method, independent of X-ray, for measuring the temperature of the intracluster medium (ICM) in the hottest systems. Here, using N-body/hydrodynamic simulations of three galaxy clusters, we compare the two quantities for a non-radiative ICM, and for one that is subject both to radiative cooling and strong energy feedback from galaxies. Our study has yielded two interesting results. Firstly, in all cases, the SZ temperature is hotter than the X-ray temperature and is within ten per cent of the virial temperature of the cluster. Secondly, the mean SZ temperature is less affected by cooling and feedback than the X-ray temperature. Both these results can be explained by the SZ temperature being less sensitive to the distribution of cool gas associated with cluster substructure. A comparison of the SZ and X-ray temperatures (measured for a sample of hot clusters) would therefore yield interesting constraints on the thermodynamic structure of the intracluster gas.Comment: This version accepted for publication in MNRAS following minor revisio