Showing papers by "International Islamic University, Chittagong published in 2004"

V B~2 and ZrB~2: a density functional study

Abstract: Structural, mechanical and elastic behaviour, density of states, electronic charge density and band structure of V B2 and ZrB2 are studied by the ab initio density functional method. The calculations carried out using the gradient-corrected approximation of the density functional theory are in excellent agreement with the experimental results where available. The five independent elastic constants have been calculated for the first time for V B2 and ZrB2. The elastic behaviour of these compounds is compared with the measured values for ZrB2 and TiB2. The origin of the pseudogap in the total density of states, a common feature of the compounds, is interactions between boron p states. The analyses of calculated density of states and band structure do not indicate superconductivity in the compounds.

Electron impact single ionization of light ionic targets with charge q> 2

Abstract: The electron impact single ionization cross-section of light ionic targets with multiple charges greater than 2 is evaluated employing two distinct modifications of the binary-encounter dipole (BED) model, the intermediate BEDTG and the modified BED (MBED) models. BEDTG incorporates the ionic correction due to Thomas and Garcia, whereas MBED embodies modification of the Burgess denominator along with the ionic correction. The differential continuum oscillator strengths are obtained adopting the analytic fits to available photo-ionization cross-sections, calculated quantum mechanically. To assess the reliability of these proposed modifications, a few simple targets, e.g., C 3+ ,N 4+ ,O 4+ ,O 5+ ,N e 6+ and Ne 7+ with known reliable theoretical results, are considered. Although the present MBED model seems to underestimate systematically the experimental data above 10 keV, it explains the data in the threshold and peak regions reasonably well with its predictions close to those from the Coulomb–Born approximation, convergent-close-coupling, distorted wave Born approximation withR-matrix, time-dependent andR-matrix pseudostate methods.

Augmented reality and its challenges

Abstract: This paper cover's the augmented reality (AR) and some crucial technological issues to take care. It concentrates mainly on the challenges of AR to make it broad and a success. Some thoughts on the advent of AR also have been incorporated for the future. It is evident that the prospects of AR are enormous for the betterment of humanity.

Islamic Banking Regulations in Light of Basel II

Abstract: This paper seeks to determine whether the existing regulatory standards and supervisory framework are adequate to ensure the viability, strength, and continued expansion of Islamic financial institutions. The reemergence of Islamic banking and the attention given to it by regulators around the globe as to the implications of a recently issued Basel II banking regulation makes this article timely. The Basel II framework, which is based on minimum capital requirements, a supervisory review process, and the effective use of market discipline, aligns capital adequacy with banking risks and provides an incentive for financial institutions to enhance risk management and their system of internal controls. Like conventional banks, Islamic banks operate under different regulatory regimes. The still diverse views held by the regulatory agencies of different countries on Islamic banking and finance operations make it harder to assess the overall performance of international Islamic banks. In light of the increased financial innovation and diversity of instruments offered in Islamic finance, the need to improve the transparency of bank operations is particularly relevant for Islamic banks. While product diversity is important in maintaining their competitiveness, it also requires increased transparency and disclosure to improve the understanding of markets and regulatory agencies. The governance of Islamic banks is made even more complex by the need for these banks to meet a set of ethical and financial standards defined by the Shari`ah and the nature of the financial contracts banks use to mobilize deposits. Effective transparency in this area will greatly enhance their credibility and reinforce their depositors and investors’ level of confidence.

Route optimization for network mobility

Abstract: This paper proposes a novel technique called route optimization to reduce the overhead and enhance the performance of a mobile network. The proposed protocol is more efficient than the basic solution [Thierry Ernst (2003)]. It effectively reduce unnecessary large traveling route and overhead, thereby enhance performance. The comparative analysis for both protocols has been presented at the end of this paper.