October 2011
Comparative analysis of abrasive waterjet (AWJ) technology with selected unconventional manufacturing processes
This paper deals with a comparative analysis, and compares abrasive waterjet cutting technology with oxy-fuel, plasma and laser unconventional manufacturing processes. This paper is intended to provide initial technical and economic information relating to the comparison of technologies. Key words: Abrasive waterjet, plasma cutting, oxy-fuel cutting, laser cutting.
October 2011
Coefficient distribution of the stability function of a high order integrator
This study considers the stability function of a high order integrator analysed by Onianwa and Aashikpelokhai (2007) for the sole purpose of having a sound knowledge of the way in which the coefficients of the stability function is distributed. The study enables us to draw the conclusion as an alternative proof that lies in the unit ball in R3. It also studied and established that the integrator is consistent...
October 2011
A class of exact solutions of second grade fluid
This paper describes a class of exact solutions of the equations of motion for an unsteady, incompressible non-Newtonian second grade fluid in the Cartesian co-ordinates. The exact solutions of non-linear equations governing the flow of second grade fluids are obtained through generalized separation variables method by assuming certain form of stream functions. The expressions for velocity profile and vorticity stream...
October 2011
Fuzzy ideals in partially ordered pseudoeffect algebras
Pseudoeffect algebras are non-commutative generalizations of effect algebras, which can serve as models of both quantum structures and non-commutative logics. The main contribution of this study is twofold. Firstly, we initiate an order-theoretic extension of pseudoeffect algebras, called partially ordered pseudoeffect algebras (abbreviated po-PEAs). Secondly, we investigate the fuzzy ideal theory of po-PEAs. In...
October 2011
A new method for moving object detection using variable resolution bionic compound eyes
The compound eyes of insect are highly optimized for the task of visual acquisition of relevant information from the environment, such as moving object detection. These have attracted the attention of many researchers in recent years. The advantages of compound eyes are illustrated in this paper in relation to other approaches in moving object detection. The paper describes the imaging mechanism for the compound eyes,...
October 2011
Effectiveness of 3D geoelectrical resistivity imaging using parallel 2D profiles
Acquisition geometry for 3D geoelectrical resistivity imaging in which apparent resistivity data of a set of parallel 2D profiles are collated to 3D data set was evaluated. A set of parallel 2D apparent resistivity data were generated over two model structures. The models, horst and trough structures, simulates the geological environment of a weathered profile and refuse dump site in a crystalline basement complex,...
October 2011
Reducing multiplication operation and independent processing for monocular simultaneous localization and mapping (SLAM) feature state covariance matrix computation
Monocular simultaneous localization and mapping (SLAM) research is a study which concentrates on how to derive position and motion estimates information from tracked features using a single camera. Before the features can be processed by standard extended Kalman filter (EKF), they have to be initialized. In the initialization process, the state covariance matrix calculation is found to be the most time consuming...
October 2011
Construction of efficient conjoint experimental designs using MCON procedure
Conjoint analysis has been a widely used method for measuring customer preferences since 1970s. This method is based on the idea that customers' decisions depend on all tangible and intangible product features. One of the fundamental steps in performing conjoint analysis is the construction of experimental designs. These designs are expected to be orthogonal and balanced in an ideal case. In practice, it is hard to...
October 2011
A novel nanometric fault tolerant reversible divider
Quantum and reversible logic circuits have more advantages than the common circuits, like low power consumption. These circuits are good choice to design future computers. One of the important issues in reversible logic is parity preservation. If parity of inputs and outputs are equal in reversible gate, this gate will be parity preserve. Reversible circuits made by these gates are parity preserve. In this paper we...
October 2011
Differential evolution algorithms for grid scheduling problem
Differential evolution (DE) has recently emerged as simple and efficient algorithm for global optimization over continuous spaces. DE shares many features of the classical genetic algorithms (GA). But it is much easier to implement than GA and applies a kind of differential mutation operator on parent chromosomes to generate the offspring. Grid computing aims to allow unified access to data, computing power, sensors and...
October 2011
Detection of damage location using mode shape deviation: Numerical study
This study presents the use of mode shapes for the identification of damage location. The residual values from curve fitting procedure on mode shape vectors with Chebyshev standard rational series were used to detect the damage along the beam length. The results showed that all the mode shapes for the damaged cases deviated from that of the undamaged case, where the deviation was towards the damage location. The results...
October 2011
Removal of random noises for electrocardiogram (ECG) signals using adaptive noise canceller without reference input
The removal of random noises in electrocardiogram (ECG) using adaptive noise canceller (called single-input adaptive noise canceller) without reference input is presented in this paper. Common approaches for noise cancellation require reference input that must be well-correlated with the noise part of the primary input. However, the reference input may be limited in availability and hence, results in degradation of...
October 2011
New low specific absorption rate (SAR) antenna design for mobile handset
We intend and design a new type of mobile handset antenna structure to reduce the specific absorption rate (SAR) in human head. The designed of low SAR handset antenna will be operating at 2.4 GHz frequency for wireless local area network (WLAN) by considering some parameters that determine the performance of the antenna. The authors carried out simulation by placing antenna at different position to determine...
October 2011
Quantitative analysis of cohesive energy density: A Gordon parameter of 1:1 aqueous sodium salts solutions
The Gordon parameter (g/V21/2(dyne mol1/2)/cm2) of solutions of NaNO3, NaCl and CH3COONa binary mixtures of water in composition range 0.4 to 8.7, 0.6 to 4.6 and 0.4 to 6.1 mol/kg (m), respectively are reported. The cohesive energy density data are analyzed in terms of aggregation of the water molecules around ionic sphere. The 13 ((dyne mol1/2)/cm2) value of the Gordon parameter (g/V21/2) was noted for effective...
October 2011
Synthesis and characterization of PbO nanostructure and NiO doped with PbO through combustion of citrate/nitrate gel
Our goal in this research was to obtain lead oxide nanostructure and NiO doped with PbO through the combustion of a citrate/nitrate gel. In this method, lead oxide nanostructure and NiO doped with PbO was synthesized through the reaction of citric acid (C6H7O8.H2O) solution and lead acetate (Pb(C2H3O2)) solution as stabilizer and precursor, respectively. At first, in the presence of metal nitrate and citric acid,...
October 2011
DFT study of solvent effects on tautomerization of 4-(2-thiazolylazo)-resorcinol
Here, the structural parameters of the enol and keto tautomers of the 4-(2-thiazolylazo)-resorcinol (TAR) were determinate. Also, tautomerization mechanism of the TAR was investigated, employing density functional theory and the polarizable continuum model (PCM). In addition to the gas phase calculations, the tautomerization mechanism of the TAR was investigated in the chloroform and dimethyl sulfoxide (DMSO) solutions...
October 2011
The pseudo Grüneisen parameter in dense fluids from distribution functions
The Grüneisen parameter (in solids) and the pseudo Grüneisen parameter (in liquids) are of high importance in physics, chemistry and material science. The pseudo Grüneisen parameters in dense fluids have been evaluated using three known analytical expressions for radial distribution functions (RDFs). Using such approach not only tests the power of distribution functions theory in predicting the pseudo...
October 2011
A GIS-based survey for the optimization of infiltration forecasting models with emphasis on slope effect and land use
Morphology and specifically slope have an important effect on water losses due to infiltration and obtained runoff from rainfall. Approximately all of infiltration models survey infiltration in the large scale region (like a basin) and through a vertical column. In other words, they work with this assumption that slope is equal to zero. There are few infiltration models such as modified green and Ampt model which use...
October 2011
Effect of cement content and water/cement ratio on fresh concrete properties without admixtures
This paper investigates the effects of cement content and water/cement ratio on workable fresh concrete properties with slump changing between 90 to 110 mm, and determines the relations among fresh concrete properties such as slump, compacting factor, VeBe, unit weight and setting times of mortar with temperature history. The experiments were conducted under laboratory conditions on eight different concrete mixtures...
October 2011
Effect of fly ash and hemihydrate gypsum on the properties of unfired compressed clay bricks
The effect of fly ash type F and hemihydrate gypsum on the mechanical and thermal properties of unfired compressed clay bricks (UCSB) using a semi-dry mixture was determined. UCSB were molded from two different semi-dry mixtures, the bricks made with dark-brown soil + sand + chemical additives were labeled as DBS-LG while the other bricks made with the mixture dark-brown soil + sand + fly ash +...
October 2011
Physical and mechanical properties of decomposed granite soils sampled in Cheongju, Korea
Decomposed granite soils are in a wide range of conditions depending on the degrees of weathering. This paper is intended to examine laboratory tests, such as consolidation tests and conventional triaxial compression (CTC) tests conducted in order to find out the mechanical properties of Cheongju granite soil. Along with the foregoing, the results of basic physical tests conducted in order to grasp the physical...
October 2011
Bond length effect of fiber reinforced polymers bonded reinforced concrete beams
There has been a large amount of experimental study on strengthening of concrete structures in recent years. An alternative method to experimental study is the finite element method when studying the performance of concrete beams strengthened with fiber reinforced polymer. Although many improvements have been recorded with the experimental studies, there are still needs for reliable numerical studies. The behavior of...
October 2011
Downscaling Albedo from moderate-resolution imaging spectroradiometer (MODIS) to advanced space-borne thermal emission and reflection radiometer (ASTER) over an agricultural area utilizing ASTER visible-near infrared spectral bands
Due to the limitation in spatial and spectral resolution, a few numbers of satellite data are applicable in field scale surface Albedo modeling. ASTER was an alternative for surface energy balance modeling, but since April 2008, shortwave detector has stopped recording due to the high-abnormal-temperature problem. Beside, temporal resolution of ASTER is insufficient for field-scale monitoring of surface parameters....
October 2011
Computation of shoreline change: A transient cross-shore sediment transport approach
It has been well understood that almost all coasts experience permanent and transient changes due to water waves and other causes in different times. Build-up and erosion of the dunes in the vicinity of the shoreline is a morphodynamic process made by the cycle of windblown fine sediments and wave surges. This phenomenon has been investigated and the beach profile change has been represented by a mathematical...
October 2011
Magneto-hydrodynamic (MHD) flow past an infinite vertical plate immersed in a stably stratified fluid
The effect of transverse magnetic field on the flow past an infinite vertical plate, immersed in a stably stratified fluid has been investigated. The non-dimensional governing equations are solved by Laplace transform technique. Numerical computations for velocity, temperature, plate heat flux and skin-friction are made for different values of the physical parameters and shown in graphs. Important observations due to...
October 2011
X-ray spectroscopic evaluation of zinc at different applied pressure
K X-ray fluorescence cross-sections of zinc (Zn) in linear region and infinite mass thickness region are measured using Si(Li) detector at photon excitation energy of 59.5 keV. Besides, this study has investigated the effect of experimental fluorescence cross-sections on relation between two different mass thickness of the sample with different applied pressures. Harmony between linear and infinitive (critical)...
October 2011
A case study of the application of electrical resistivity imaging for investigation of a landslide along highway
Electrical resistivity imaging (ERI) survey was conducted in an area where landslide occurred in the Elmadag district of Ankara-Kirikkale highway and railway route, central Turkey. Landslide occurred after heavy rainfall in a rock consisting of a succession of limestone layer which was fractured. Electrical resistivity and borehole surveys were carried out to obtain the characterization and quantification of the...
October 2011
The physics aspect of price index changes: Super- diffusive approach
Attempts were made to quantify the buying and selling interaction of worldwide financial markets into quantitative findings. We introduce a probability density derived from non-extensive Tsallis statistical mechanics that can be applied to the interpretation of percent price index changes for important indices such as NYSE Composite, DJIA, S&P 500, NASDAQ Composite, FTSE 100, NIKKEI 225, Hang Seng, Straits Times and...
October 2011
Evaluation of stock market technical efficiency with a comparison of groups of companies in Dhaka stock exchange
The objective of this study was to measure stock market efficiency of the groups of companies, such as Group-A (financial), Group-A (non-financial), Group-B and Group-Z of Dhaka stock exchange (DSE) market in Bangladesh applying the Stochastic Frontier approach, incorporating technical inefficiency effect model. Among the four groups, most efficient group was Group-A (financial) and most inefficient group was Group-Z....
October 2011
Effects of NMES on pharyngeal muscle group synergy while swallowing
The act of swallowing is an extremely complicated event involving multiple muscle groups engaged in complex synergies. Traditionally, dysphagia therapy has focused on muscle strengthening and range of movement. However, recent evidence suggests that specific and shared muscle synergies play a critical role in the coordinated movements required in swallowing. This study investigated the overall effects of muscle strength...
October 2011
Separation of fetal electrocardiography (ECG) from composite ECG using adaptive linear neural network for fetal monitoring
The signal strength of the maternal ECG (MECG) is usually many times that of the fetal ECG (FECG). Separating FECG from abdominal ECG (AECG) is therefore always a challenge. Some multiple-lead algorithms use the thoracic MECG to cancel the MECG in the AECG to get FECG, though this is inconvenient for the patient during long-term monitoring. Hence, this paper describes an adaptive method to separate fetal ECG from...
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