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Al Jubayl, Saudi Arabia

Ali K.M.,Jubail University College
Proceedings - 2012 4th International Conference on Computational Intelligence, Communication Systems and Networks, CICSyN 2012

Digital Forensics is a new discipline in computer science, which was developed as the response to the increased unauthorized activities in computer and information systems. As a result of the increasing dependency of the society and the business on information systems and the fact that e-commerce and online business became essential part of today's world business, computer attacks and cyber crimes are continually on rise. Due to various reasons, the legal system, law enforcement, computer forensics and investigations seem to be behind in their efforts to track down criminals and successfully to prosecute them. This paper gives an overview of forensic computing and discusses key issues to be considered in forensic investigations and digital evidence analysis processes. The paper also identifies best practices for digital forensics investigation process and addresses key elements of forensic computing managerial implications. © 2012 IEEE. Source

Shuttleworth I.G.,Jubail University College
Chemical Physics Letters

The pairing-row (pr) reconstructed (1 × 2)-H/Pd(1 1 0) surface has been shown to be paramagnetic with a lower magnetic susceptibility than that of clean Pd(1 1 0). The magnetic properties of the surface are shown to be dominated by the Pd rather than H electronic states and act to reduce surface magnetism; however, the Pd states are highly dependent on the H-driven reconstruction. LDA band structures show curvature similar to that obtained experimentally and dominant features in the experimentally-observed ARUPS spectra at S̄ are explained by strong Pd-based scattering rather than magnetic mechanisms. © 2013 Elsevier B.V. All rights reserved. Source

Shuttleworth I.G.,Jubail University College
Applied Surface Science

The electronic structure of the FCC, HCP and 2-fold bridge phases of the (√3 × √3)R30°-Cu 2Si/Cu(1 1 1) surface alloy have been investigated using LCAO-DFT. Analysis of the total electron density, partial density-of-states (PDOS) and crystal orbital overlap population (COOP) curves for the system have shown a surprising similarity between the intra- and inter-layer Si-Cu bond for each phase. Low hybridization between the Si 3s and 3p orbitals results in a low directionality of the Si-Cu bond within each of phase. The Si 3s orbitals are shown to form covalent bonds with their surrounding Cu atoms whereas the Si 3p and 3d orbitals are shown to form combinations of covalent and metallic bonds. The Si-Cu interaction is shown clearly to extend to the second layer of the alloy in deference to previous studies of Si/Cu alloys. © 2011 Elsevier B.V. All rights reserved. Source

The activity concentration of 210Po in cereals, pulses, food materials of animal origin, vegetables and spices collected from Gudalore (India) has been estimated by radiochemical method. The activity concentration of 210Po in cereals is found to vary from 124 to 604mBqkg-1. Raw rice registered the highest mean activity 504±61mBqkg-1. In pulses 210Po activity concentration varies from 42 to 320mBqkg-1 and the highest activity is found in black lentil with the average value of 172±38mBqkg-1. Leafy vegetables registered the highest 210Po activity concentration (662-7336mBqkg-1) and are followed by tuber vegetables (390-1269mBqkg-1) and then by other vegetables (75-595mBqkg-1). The higher concentration of 210Po observed in leafy vegetables may be attributed to the dry deposition of 210Po and other daughter products of 222Rn on large leaf surfaces from the air. Among animal products fish of marine origin registered the highest 210Po activity concentration 36,850-48,964mBqkg-1. The mean 210Po activity concentration in coffee has been estimated as 7500mBqkg-1. The activity concentration of 210Po in leaf and bark of tree Cinnamom zeylanicum, a popular spice, is found to vary from 3500 to 11,100mBqkg-1 and 1600-3400mBqkg-1. The consumption of marine and fresh water fish contribute 60.7% (506.1μSvy-1) to the total ingestion dose received. Cereals being consumed in a large scale, contribute 23.4% (194.9μSvy-1) of the total ingestion dose received. The contribution from spices and leafy vegetables consumed is 5.8% (48.1μSvy-1) and 6.5% (54.3μSvy-1), respectively. The remaining 3.6% (30.0μSvy-1) contribution to the total ingestion dose comes from other food materials and vegetables. © 2014 Elsevier Ltd. Source

Shuttleworth I.G.,Jubail University College
Journal of Physics and Chemistry of Solids

The pure and hydrogenated copper system CuH n (n=0, 0.25, 0.50, 0.75 and 1) has been investigated using LCAO-DFT. The average H-Cu (Cu-Cu) bonding interaction increases (decreases) with n whilst concurrent orbital-resolved studies of the H-Cu interactions showed that the (non-)directional H-Cu bonds become more (less) bonding. This preference for directional bonds is reflected in the Cu-Cu interactions. CuH 0.25 is shown to have an unusually localized electronic structure compared to the more hydrogenated systems, and the origins of this structure are discussed. © 2012 Elsevier Ltd. All rights reserved. Source

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