December 2011
Study of slip and induced magnetic field on the peristaltic flow of pseudoplastic fluid
Effects of slip and induced magnetic field on the peristaltic flow of pseudoplastic fluid have been investigated. The corresponding shear stress is employed in defining the slip condition. The fluid is considered in a channel with non-conducting walls. The arising flow problem is solved in view of the assumptions of long wavelength and low Reynolds number. The stream function, pressure gradient and magnetic...
December 2011
Accelerated flows of a magnetohydrodynamic (MHD) second grade fluid over an oscillating plate in a porous medium and rotating frame
The aim of this paper is to determine the exact solutions for the velocity field related to the magnetohydrodynamic (MHD) and rotating flow of a second grade fluid in a porous medium induced by accelerated flows over an oscillating plate. This is accomplished by using the Fourier sine and Laplace transforms. Two explicit flow situations of the fluid are considered. In each case, both sine and cosine...
December 2011
Oscillatory channel flow for non-Newtonian fluid
This paper deals with an analytical solution of oscillatory flow of an incompressible second grade fluid in a channel. The flow in the channel is driven by suction at the permeable walls, whereas small amplitude time harmonic pressure waves are responsible for oscillations in the velocity field. The time independent axial velocity and the time dependent oscillatory axial velocity are calculated...
December 2011
A new finite element investigation on pre-bent steel strips as damper for vibration control
In this study, a new type of seismic energy-dissipative device in the form of braces based on pre-bent strips has been utilized. In this approach, moment-resistance frame systems have been used for 3, 5, 7, 9, 11 and 12 stories and various models. The height of stories and all span lengths are 3 m. In order to compare the response of models, braced (with damper) and unbraced (without damper) have been...
December 2011
Study on the frequency – amplitude relation of beam vibration
New analytical work on the well-known preload nonlinearity using the innovative equivalent function (EF) is presented in this paper. The nonlinear vibration of cantilever beam with nonlinear boundary condition in the presence of preload spring with cubic nonlinearity is studied. The powerful analytical method, called He’s Parameter Expanding Method (HPEM) is used to obtain the exact solution of dynamic...
December 2011
Preliminary investigation of tensile properties of welded type I collagen to be used as surgical sealant
Type I collagen has been identified as the most abundant protein in the human body, and it has been used extensively in the healthcare industry as a biomaterial for the purposes of soft tissue repair, tissue engineering and many other areas. The aim of this study was to research the mechanical tensile strength of type I collagen when welded together for possible use as a sealant biomaterial for surgical...
December 2011
NMR and natural bond orbital (NBO) calculation of glyoxals: Nano physical parameter investigation
December 2011
Proximate chemical analysis of nutritive contents of Jujube (Ziziphus mauritiana) seeds
This study provided estimate of nutrient content of Ziziphus mauritiana, a lesser known tropical legume plant. Chemical analysis of the seeds collected from Bojude in Kwami local government area in Gombe State and Hanani in Bauchi local government area, Bauchi State in Nigeria, showed that, the crude protein, moisture, ash, crude fibre, lipids and carbohydrates were 36.10 ± 57, 4.21 ±...
December 2011
Effects of promoters on methane dry reforming over Ni catalyst on a mixed (a-Al2O3+TiO2-P25) support
Carbon dioxide reforming of methane to synthesis gas over Ni on a mixed (α-Al2O3 and TiO2-P25) support was investigated. The effect of adding Zr and Ce promoters to the supported catalyst was studied. Catalytic testes were performed at atmospheric pressure, flow rate of 33 ml/min and various reaction temperatures in the range of 500 and 800°C. The influence of several operating conditions such...
December 2011
Mannheim partner curves in 3-dimensional Heisenberg group
In this study, we give some basic theorems for Mannheim partner curves in three dimensional Heisenberg group. We also found the relations between the curvatures and torsions of these associated curves. Key words: Heisenberg group, Mannheim curve.
December 2011
Thermographic analysis of Wi-Fi frequencies exposed to unrestrained Swiss albino mice
Effects of electromagnetic field exposure due to Wi-Fi frequency were presented. A total of 72 unrestrained Swiss albino mice were used as surrogate and were divided into two groups of sham exposed and 2.46 GHz exposure group. The exposure duration was for 7 h/day, 7days/week for 4 consecutive weeks. Thermographic pictures of both groups were taken to obtain the body temperature of the mice before and after...
December 2011
Self-decision route selection for energy balancing in wireless sensor networks
In many wireless sensor network (WSN) applications, data from the monitored environmental phenomenon only need to be sampled intermittently and transmitted to the base station. Hence, an intelligent protocol that balances the traffic load among the nodes and minimizes their energy usage, especially during routing and idle listening, which is necessary to extend the network lifetime. In this paper, a load...
December 2011
Synchronous Nyquist folding receiver using dual harmonics local oscillator signals
A synchronous Nyquist folding receiver (SNYFR) could intercept wideband signals in multi-Nyquist zones with two analog-to-digital converters. The instantaneous Nyquist zone (INZ) of the SNYFR may not exist or is not unique, and the dual local harmonics was presented to improve the stability of the SNYFR. It was found that the existence and unique conditions of the INZ determined that the frequency of the...
December 2011
Linear probability based admission control policy for video on demand system
In this paper, we propose a dynamic admission control policy for distributed video on demand system, based on linear probability function. The probability of accepting a video request is calculated by using a liner mathematical formula. Quality of service (QoS) is granted by restricting the requests on the basis of popularity of request and availability of resources. The popular video request will get better...
December 2011
An enhanced embedding method using inter-sentence, inter-word, end-of-line and inter-paragraph spacing
This paper discusses a novel embedding mechanism which uses hybrid methods of inter-sentence, inter-word, end-of-line and inter-paragraph spacing to embed the secret message. From the test cases analysis, the proposed system has proven that it is able to hide larger capacity compared to other current steganographic tools such as wbStego4open, SNOW and Spacemimic. From the experimental results, the proposed...
December 2011
Quality factor, static and dynamic responses of miniature galfenol actuator at wide range of temperature
In this research, galfenol (iron-gallium alloy) is exploited to make a miniature actuator. The relationship between displacement and the applied current is measured. Furthermore, the dynamic behaviors of the actuator in wide range of temperature from cryogenic environment (77 K) to room temperature (RT) are investigated numerically and experimentally. Although, the length of galfenol bar is 10 mm and the...
December 2011
Stability of DNA binding with dipyrandium: A theoretical study
Recent analysis on structure and dynamics of nucleic acid suggest that the DNA helix undergoes conformational transition as function of salt and solvent. This flexibility leads folding of DNA either smoothly or its chain direction changes abruptly by the generation of kinks. The steroid diamine binds to DNA through the minor groove at the kink site and stabilized the complex. In the present study, we reported...
December 2011
Asphaltic concrete facing for rockfill dams in arid and semi-arid countries: A case study of Alsourani Dam, Syria
Asphaltic concrete lining for dams and storage reservoirs are today classified as state of the art technology. Storage reservoirs and dams are sealed with asphaltic concrete –world-wide. However, certain prerequisites are absolutely necessary for the successful use of this sealing method. First, there must be careful selection and suitability testing of the construction materials and then the subsequent...
December 2011
Glass-forming tendency in the K2O-BaO-B2O3-Al2O3-TiO2 system
Vitrification in the system of K2O-BaO-B2O3-Al2O3-TiO2 containing (mol%): K2O (0 to 28), BaO (0 to 28), B2O3 (5 to 24), Al2O3 (7 to 25) and TiO2 (33 to 60) was investigated by fusion at 1450°C for 2 h. The fields of vitrification were analyzed with different forms of diagrams. It is shown that stable glasses can be produced with batchs containing 62 to 75 mol% of glass-formers...
December 2011
Changes in local B-value prior to moderate local earthquakes: Gulf of Aqabah, northern red sea
During the last fifteen years, the Gulf of Aqabah has been considered as one of the most seismically active zones in the Middle East region. A catalogue of 1415 events were compiled using the available data from the Seismic Studies Center Network, King Saud University and the adjacent neighboring networks. The data cover the time span that started from 1985 to 1995 and an area located between latitudes 28 to...
December 2011
Modified quadratic shepard and radial basis functions interpolations for determination of orthometric heights from global positioning system (GPS) heights
We can obtain the position of any point on earth easily, accurately and quickly as geocentric coordinates (X, Y, Z) or geodetic coordinates (Ø, λ, h) in the World Geodetic System (WGS84) coordinate system with global positioning system (GPS) technique widely used in engineering studies today. However, we need to convert the ellipsoid height (h) to orthometric height to be able to...
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