a study on natural radioactivity in virgin and agricultural soil samples collected from sungai petani was conducted using high-purity germanium. the mean activity concentrations of 226ra, 232th, and 40k in virgin soils were 51.06±5.83, 78.44±6.42, and 125.66±7.26 bq kg−1, respectively, while those in agricultural soils were 80.63±5.78, 116.87±7.87, and 200.66±18.24 bq kg−1, respectively. the co...

the activity concentration of gross alpha and gross beta particles in four samples of borehole drinking water consumed in ibrahim badamasi babangida university (ibbu), lapai, niger state-nigeria was measured, using a portable single channel gas free proportional counter (mpc2000b-dp) detector. this study focused on cancer related problems and the bio-data of the environment was discussed as wel...

Carbon has been used as a face material in mechanical seals for well over fifty years. The first grades of carbon used were developed from carbon electrical brush materials, but the continuous increase in the severity of mechanical seal operating conditions has necessitated ever improving grades of carbon. This paper details some of the means available to the carbon technologist to achieve thes...

The role of an educational technologist is difficult to define. This paper reflects on the experience of working on a range of technology enhanced learning in science projects to review a number of working principles which have proved effective in the practice of educational technology. It discusses how these principles relate to the theories in use in educational technology. Three case studies...

BACKGROUND The aim of this paper was to evaluate the validity of tumor volume measurement using diffusion-weighted (DW) imaging in cervical cancer. METHODS In this retrospective study, 22 patients, who underwent preoperative 3.0 T MR examinations with DW imaging were evaluated. Tumor volume measurement by oblique axial (short axis to the uterine cervix) T2-weighted imaging was performed by ma...

Medical imaging is generally equated to radiology or "clinical imaging" and the medical practitioner responsible for interpreting (and sometimes acquiring) the image is a radiologist. Diagnostic radiography designates the technical aspects of medical imaging and in particular the acquisition of medical images. The radiographer or radiologic technologist is usually responsible for acquiring medi...

This paper discusses art systems that employ image and sound as equal elements. This can be called the evolution of the “audiovisual discourse” in art and technology. Recent software for manipulation of audio and visual material is briefly described, and audio/visual digital artworks, developed during an artist-in-residence-based project, are illustrated as examples of contemporary artistic pro...

Shortly after the discovery of X-rays by the German physicist Wilhelm C. Roentgen in November 1895, the first X-ray apparatus was installed in 1898 in Beirut at the Prussian Hospital affiliated since 1887 with the Medical School of the Syrian Protestant College founded in 1867 (later American University of Beirut in 1920). The first chest radiographs were produced after a long exposure time in ...