Showing papers in "Scientia Iranica in 2012"

TL;DR: The basic TLBO algorithm is improved to enhance its exploration and exploitation capacities by introducing the concept of number of teachers, adaptive teaching factor, tutorial training and self motivated learning.

TL;DR: In this paper, the magnetohydrodynamic boundary layer flow of a Casson fluid over an exponentially permeable shrinking sheet has been investigated and the analytical solution arising differential system has been computed by the Adomian Decomposition Method (ADM).

TL;DR: In this paper, the influence of aggregate content on the engineering properties of geopolymer concrete has been investigated and it has been concluded that a geopolymers concrete with proper proportioning of total aggregate content and ratio of fine aggregate to total aggregate, along with the optimum values of other parameters, can have better engineering properties than the corresponding properties of ordinary cement concrete.

TL;DR: The bi-objective optimization problem is converted into a single objective function using a price penalty factor in order to solve the CEED problem with the Gravitational Search Algorithm.

TL;DR: A review of representative research reported in journal articles in the field of structural system identification published in journals since 1995 is presented in this article, which is divided into five sections based on the general approach used: conventional model-based, biologically-inspired, signal processing-based and multi-paradigm approaches.

TL;DR: In this paper, Spirulina platensis was used to synthesize crystallized silver nanoparticles (SNPs) in an aqueous system, which showed an absorption peak at 430 nm in the UV-visible spectrum corresponding to the plasmon resonance of SNPs.

TL;DR: In this article, the development in the electrospinning method toward fabrication of core-shell, and hollow and porous nanofibers are presented, and experienced methods for producing these novel fibers, such as Nonsolvent-Induced Phase Separation (NIPS) and phase separation are described.

TL;DR: In this article, the tensile and fracture behavior of as-cast and age-hardened aluminium (6063), silicon carbide particulate composites produced, using borax additive and a two-step stir casting method, was investigated.

TL;DR: In this article, the authors proposed a multi-objective optimization problem to minimize the total cost of the supply chain with the consideration of environmental effects, such as NO2, CO and volatile organic particles produced by facilities and transportation.

TL;DR: In this article, the three-dimensional problem of steady fluid deposition on an inclined rotating disk is illustrated, where the governing non-linear partial differential equations are reduced to the nonlinear ordinary differential equations system by similarity transform.

TL;DR: In this article, a new approach for integrating the latest innovations in ADC technologies for real-time data collection in construction is presented, which can facilitate extremely low-cost, infrastructure-free, and easy-to-implement solutions to uniquely identify materials, components, and equipment.

TL;DR: This paper proposes a new QoS-based workflow scheduling algorithm based on a novel concept called Partial Critical Paths (PCP), which tries to minimize the cost of workflow execution while meeting a user-defined deadline.

TL;DR: An inventory model of two-warehouse is considered with quadratically increasing demand and time varying deterioration, derived with finite replenishment rate and unequal length of the cycle time.

TL;DR: In this paper, the authors investigated the effect of Richardson number augmentation on heat transfer in a lid-driven cavity by linearly heated wall and found that the Richardson number augmented with Richardson number increased heat transfer.

TL;DR: In this article, CoFe 2 O 4 nanoparticles were used as an efficient catalyst for the conversion of alkenes to the related aldehydes or epoxides, with almost quantitative yields.

TL;DR: Comparison between the models and the empirical formulas shows that the ANN model with the MLP/BP algorithm provides better prediction for shear strength than the ICI and ACI empirical codes.

TL;DR: In this paper, the Lattice Boltzmann Method (LBM) was applied to investigate the effect of CuO nanoparticles on natural convection with magnetohydrodynamic (MHD) flow in a square cavity.

TL;DR: In this article, a highly sensitive colorimetric method for the determination of cysteine and glutathione, based on aggregation of the citrate capped gold nanoparticles (Au NPs), was developed.

TL;DR: In this article, the feasibility of utilizing steel slag aggregates in Stone Matrix Asphalt (SMA) mixtures was investigated and it was shown that the use of steel slags as the coarse portion of aggregates can enhance Marshall stability, resilient modulus, tensile strength, resistance to moisture damage and resistance to the permanent deformation of SMA mixtures.

TL;DR: Some new probability aggregation operators with intuitionistic fuzzy information are developed and applied to decision-making problem about the selection of the optimal production strategy and the developed models and procedures shall extend to solve probabilistic decision- making problems with interval-valued intuitionism fuzzy information.

TL;DR: This paper presents a simple and efficient approach to on-line signature verification, based on a discrete cosine transform, which has been applied to 44 time signals, such as position, velocity, pressure and angle of pen.

TL;DR: In this paper, the use of additives to encourage the preliminary deposition of coke-forming constituents is also an option. Depending upon the additive, disposal of the process sediment can be achieved by a choice of methods.

TL;DR: In this paper, a new plant-based natural cationic surfactant, named Seidlitzia rosmarinus, is introduced, and the viability of using this natural surfactorant as an alternate to synthetic surfactants for chemical enhanced oil recovery is investigated.

TL;DR: In this article, the authors developed a comprehensive model of high speed spindles that includes viable models for the mechanical and thermal behavior of its major components, i.e., bearings, shaft and housing.

TL;DR: In this article, the homotopy perturbation transform (HPTM) was used to give analytical solutions of the time fractional diffusion equation, where the HPTM is a combined form of the Laplace transform and HPTM methods.

TL;DR: In this paper, the influence of the normal load on friction and wear performance were investigated for a RBD palm olein and compared with paraffinic mineral oil using four-ball tribotester.

TL;DR: In this article, the dynamic responses of a Timoshenko beam subjected to a moving mass, and a moving sprung mass are analyzed by making recourse to Hamilton's principle, and the governing differential equations for beam vibration are derived.

TL;DR: SiO2 is an efficient, readily available and reusable catalyst for the synthesis of 1, 2, 4, 5-tetrasubstituted imidazoles using benzil, aromatic aldehyde and an amine in the presence of ammonium acetate as discussed by the authors.

TL;DR: The results determined in the study indicate that the WNN is a successful tool to model the monthly inflow series of dam and can give good prediction performances than other methods.