Iris Publishers Journal Of Engineering Sciences

Temperature-Dependence of Debye-Waller Factors of Semiconductors Presented in Terms of Cumulant Expansion Authored by Nguyen Van Hung This work studies temperature-dependence of Debye-Waller factors of semiconductors presented in terms of cumulant expansion in extended X-ray absorption fine structure (EXAFS). The advances in these studies are succeeded based on further development of the anharmonic correlated Einstein model derived primary for fcc crystals into the one for applying to semiconductors and for creating a method having the advantage that all considered quantities are provided based on only the calculation or measurement of second cumulants. Analytical expressions of three first EXAFS cumulants have been derived. They describe the thermodynamic and anharmonic properties and contribute to accurate structural determination of semiconductors. The theory simplifies the many-body task into the one of one-dimensional model with taking the many-body effects into account based on ...

Construction Waste Management in Natural Disasters in Australia Authored by Salman Shooshtarian What is construction and demolition disaster waste? Natural disasters can generate large quantities of waste that may directly threaten public health (e.g. direct human contact with hazardous waste such as asbestos), impede reconstruction (e.g. block access to affected populations and areas) and impact the environment. In particular, damage to infrastructure and buildings generate a significant amount of Construction Waste such as bricks, concrete and concrete rubble. This occurs in two phases: (1) when the actual natural disaster occurs and (2) later during the response and recovery activities (Figure 1). Overview of the occurrence of natural disasters in Australia Australian natural disasters can include heatwaves, bushfires, droughts, floods, severe storms, and tropical cyclones, earthquakes, tsunamis, and landslides. Many of these hazards are on the rise in both frequency and severity...

  A Strategy With Master-Slave Mechanism Dominates in Spatial Iterated Prisoner’s Dilemma Authored by Jiawei Li Our research shows that a Collective Strategy with Master-Slave Mechanism (CSMSM) defeats Tit-for-Tat and other well-known strategies in spatial iterated prisoner’s dilemma. CSMSMs identify their kin members by means of handshaking and then they defect against non-kin strategies and play either master or slave roles in interacting with kin strategies. A mater defects and a slave cooperates in order to maximize the master’s payoff. CSMSM outperforms non-collective strategies in spatial IPD once a small cluster of CSMSMs is formed. The existence and performance of CSMSM in spatial iterated prisoner’s dilemma suggests that cooperation may first appear and persist in a group of collective individuals. To read more about this article:  https://irispublishers.com/gjes/fulltext/a-strategy-with-master-slave-mechanism-dominates-in-spatial-iterated-prisoners-dilemma.ID.000571...

Impact of V2O5 and Gamma Ray Irradiation on The Optical and Structural FTIR Spectra of Lithium Phosphate Glass Authored by MA Ouis Combined studies on prepared undoped lithium phosphate glass of the composition (Li2O330-P2O570 mol%) and derived samples containing additional dopants of V2O5 (0.4, 1, 2, 3, 4%). The glasses have been investigated using optical (UV-visible) and FTIR spectra before and after being gamma irradiated with a dose of 6 M rad (6x104 Gy). The collective spectral properties have been employed to explore the states of vanadium ions in this specific host phosphate glass. The study extends to identify the impact of gamma ray’s irradiation on the glasses with and without V2O5. The optical spectrum of the undoped lithium phosphate glass shows distinct UV absorption which is accepted by many researchers to be due to unavoidable contaminated trace ferric ions while the absorption of the V2O5- doped samples exhibit additional bands within the visible region which are corr...