Research Title: Permeability Effect on Sound Wave Propagation in Saturated Porous Layer Lied Over Flat Plate

Author: Laith Batarseh, Published Year: 2011

Faculty: Engineering and Technology

Abstract: In this research, the effect of varying permeability on none – isentropic sound wave propagation in porous layer lied over flat plate was under investigation. The continuity, momentum and energy equations were derived, linerized and solved respectively by using the hydrodynamic / acoustic splitting method, the suitable variational solution and Euler – Lagrange approach. The effects of viscosity and thermal gradient were involved. The media was assumed to be formed by spherical particles with small diameter. The permeability was varied exponentially by varying the particle diameter and applying Carman – Kozeny relation to relate porosity and particle diameter to permeability. Both attenuation and phase velocity were found for both cases of stationary and movable flow situations. It was found that the effective parameters on propagation constant are: initial value of particle diameter (Dpo), initial value of porosity (εo) and the mean Mach number ( ). Both initial values of porosity and particle diameter have retarding effects on attenuation and enhancement effects on the phase velocity for all wave types. It is also found that as the flow velocity increases, attenuation for both forward and hydrodynamic waves decreases and the phase velocity increases while the opposite occurs for the backward wave where the attenuation increases and the phase velocity decreases.

Keywords: sound waves, porous media, permeability

Research Title: Numerical investigation of fully developed laminar flow in irregular annular ducts: Triangular–circular combinations

Author: Laith Batarseh, Published Year: 2014

Faculty: Engineering and Technology

Abstract: The aim of this study is to reduce the required pumping energy by obtaining accurately the friction factor - Reynolds number product (fRe) of the steady fully developed laminar flow in annular ducts. The study is focused on the annular region between equilateral triangular and circular ducts under all possible combinations. For this purpose, the governing equations are solved using high order finite element method. For regular annuli, it is found that higher values of area ratio lead to monotonic increase in (fRe) value, with (fRe)(max) = (24, 42.67,96) at the respective values of (D-h)= (0.5,0.75,1) regardless of the particular geometry. For irregular annuli, higher values of area ratio lead to an increase followed by a decrease in (fRe) value, with (fRe)(max) = (79.631,35.392,19.921) at the respective values of (D-h) = (0.5, 0.75, 1) for the (CT) case, and correspondingly (fRe)(max) = (91.02,40.45,22.85) for the (TC) case. On the other hand, it is found that (fRe) value inversely proportional with the hydraulic diameter (D-h). For all cases considered in this study, the largest (fRe) at the representative values (AR) = 30% is found for the (CC) case with (fRe)(max) = 95.43 whereas the smallest (fRe) is found for the (CT) case with (fRe)(min), = 17.544. More importantly, irregular annuli outperformed the regular annuli and thus are recommended to replace the classical regular annuli currently used in double duct heat exchangers. This in turn will significantly decrease the pumping energy required in such applications in industry.

Keywords: irregular annuli

Research Title: Innovative Wind Turbine Selection Method Using Modified Weibull Probability Function

Author: Laith Batarseh, Published Year: 2015

Faculty: Engineering and Technology

Abstract: In this work, a three-year wind data for some sites in Jordan was analyzed. Two sites showed highly promising potential. Both predicted more than 1.0 MWh/m2.y. This work modified the probability function of Weibull – Hiester and Pennel to produce more accurate potential speed values for the wind. Results showed that this modification enhanced energy potential by 30%. The interaction of wind turbine performance data with site wind data was then discussed. The yearly output energy of different machines was the objective function for an optimization process with rating velocity (Vr) as the main variable. The resulted optimum energy was found to depend on the two variables of the Wiebull function. Optimum Vr was found to range from 4.2 to 5.6 for the sites considered. The optimum Vr can be used as a selection parameter for the best suitable turbine.

Keywords: wind energy

Research Title: Mechanical Characteristic of concentric and Eccentric Drilling Cutting Tool

Author: Nabil Musa Wanas, Published Year: 2015

Faculty: Engineering and Technology

Abstract: Abstract In this paper cutting movement of the tilted planetary drilling is investigated For instance, the orbital drilling strategy might be acknowledged as one of these arrangements. In any case, this system cannot abstain from machining with focus of cutting device and obliges high establishment cost The main limitation of this method is the large difference between the diameter of the created hole and the diameter of the tool. In the paper geometrical improvement of the tool, spherical end tool has been successfully employed to facilitate electrolyte flow in the machining zone

Keywords: Key words: concentric,eccentric, Drilling Phase, electrolyte circulation.

Research Title: Transformation of seismic discontinuous waves by hyperboloid interfaces in anisotropic elastic media

Author: Nabil Musa Wanas, Published Year: 2014

Faculty: Engineering and Technology

Abstract: Abstract. In this paper, interaction of discontinuous waves with hyperboloid heterogeneities in anisotropic elastic media is investigated. It is shown that the interactions are accompanied by formation of reflected and refracted quasi-longitudinal and quasi-shear discontinuous waves which can be focused or scattered by elastic "mirrors" and "lenses" depending on their geometric outlines and acoustical properties. The set up problem solutions can be used for discovering the most and least seismically hazardous zones in the earth crust and for interpretation of geophysical data about geological rock structures. Key words: Anisotropic media; Discontinuous waves; Elastic mirrors and lenses; Scattering.

Keywords: Key words: Anisotropic media; Discontinuous waves; Elastic mirrors and lenses;

Research Title: Mec A and PVL Genes in Methicillin Resistant Staphylococcus aureus from Nasal Carrier Individuals Exposed and Not Exposed to Hospital Environments.

Author: Raida W. Khalil, Published Year: 2009

Faculty: Science

Abstract: Exposure to hospital environments of limited duration did not cause an increase in the nasal carriage of Staphylococcus aureus whether they are methicillin resistant or sensitive. 56% of MRSA isolated were resistant to erythromycin and lincomycin and more than 50% of those are resistant to gentamicin as well. No vancomycin resistance was encountered. Resistance to other anti-microbials was uncommon among MRSA. One MRSA strain possessed the pvl but not mec A gene. All other mec A positive strains did not have the pvl gene.

Keywords: nasal carriage, methicillin resistant Staphylococcus aureus (MRSA), methicillin sensitive staphyloccus aureus (MSSA), mec A gene, pvl gene.

Research Title: Screening of mutations in the GCK gene in Jordanian maturity-onset diabetes of the young type 2 (MODY2) patients

Author: Raida W. Khalil, Published Year: 2009

Faculty: Science

Abstract: Maturity-onset diabetes of the young type 2 (MODY2) is a genetic form of diabetes mellitus caused by mutations in the glucokinase gene (GCK). We assessed the frequency of GCK gene mutations in Jordanian suspected MODY2 patients. We screened exons 7, 8 and 9, which are specific for pancreatic glucokinase, for mutations at positions 682A>G, p.T228A; 895G>C, p.G299R, and 1148C>A, p.S383X, respectively, in 250 subjects (100 patients suspected to have MODY2 and 150 healthy controls without family history of diabetes mellitus). We did not find any association of these mutations in Jordanian suspected MODY2 patients or in healthy controls, different from data on Caucasian Italian patients screened for the same mutations.

Keywords: MODY 2 , GCK

Research Title: Enhancement of Natural Killer Cell Activity In Vitro Against Human Tumor Cells by Some Plants From Jordan.

Author: Raida W. Khalil, Published Year: 2008

Faculty: Science

Abstract: The effect of different concentrations (0, 0.01, 0.1, and 0.5 mg/ml) of plant aqueous extracts on the anti-tumor activity of natural killer (NK) cells isolated from human blood was examined. Plant extracts induced significant enhancement of (26.6-67.7%) of NK cell activity against K562 tumor cells. This increase in NK cell cytotoxicity was found to be due to the enhancement of NK cell production of interferon-gamma (87-337%), and on tumor necrosis factor-alpha (60-200%). Furthermore, the release of both granzyme A and N-acetyl-beta-D-glucosaminidase was increased significantly when compared with controls. Activation of granzyme A and N-acetyl-beta-D-glucosaminidase was clearly observed ranging from 24.2-106.4% to 26.8-110.7%, respectively. Lastly, in the absence of IL-2, plant extracts caused a significant increase in NK-cell-induced cytotoxicity (256%) against K562 tumor cells, and in the presence of IL-2 stimulated cells plant extracts caused an increase in NK cell-cytotoxicity (112%).

Keywords: NK cell production of interferon-gamma

Research Title: Assessment of the preserving efficacy of the pharmaceutical Syrups to Identified Air-Borne Microorganisms.

Author: Raida W. Khalil, Published Year: 2010

Faculty: Science

Abstract: The purpose of the current study was a continuation of the evaluation of the efficacy of different preservatives ingredients of different cough syrups and which previously assessed to Air-borne microorganisms. The airborne microorganisms were characterized firstly according to their colony color and then to their DNA sequences. The identified microorganisms were inoculated into syrup A (glycerol and propylene glycol), syrup B (propylene glycol and glycerin), syrup (C) (glycerin, propylene glycol and butyl paraben), syrup D (methyl paraben and propyl paraben) and normal saline as a control which were then incubated for 24 h. Growth of microorganisms into syrup was compared by counting the CFUs from a subculture of inoculated syrup at different time. The data showed that the genome of the three isolated air-borne microbes revealed three different species and that all the combinations of the preservatives in the four studied cough syrups behaved similarly in term of efficacy towards the microbial contamination. The results revealed that the preservatives mixtures of propylene glycol with glycerol or with glycerin or with butyl paraben preservatives and the methyl paraben with propyl paraben are have efficient antimicrobial activity against Airborne microbes during the 24 h studied period.

Keywords: Antimicrobial, 16s RNA, Preservative

Research Title: Production and Characterization of a Recombinant Camel Full Heavy Chain Antibody Against Human IgE

Author: Raida W. Khalil, Published Year: 2015

Faculty: Science

Abstract: Camel heavy chain antibodies (HCAbs) have novel properties that render them useful in diagnosis and immunotherapy of various diseases. The purpose of this study was to produce recombinant camel HCAbs directed against a synthetic loop polypeptide that mimics the FcεRІ binding site on human IgE. A recombinant camel HCAb was purified and characterized after being cloned using One Shot TOP10 Escherichia coli, expressed in BL21 Star (DE3) E. coli. Out of nineteen successful clones only one named IgG211 was found to contain the IgG2 HCAb coding sequence in the correct orientation with 85% homology to camel IgG2. A 62kDa fusion protein was expressed in an insoluble form under Isopropyl β-D-1-Thiogalactopyranoside (IPTG) induction. Probond purified fusion protein was localized by immunoblot using mouse anti camel antibody. The reactivity of recombinant camel IgG211 to its corresponding antigen using ELISA was 72.9% of the camel polyclonal IgG2. Thus, a successful production of a recombinant camel HCAb of the IgG2 isotype was achieved. Such achievement may contribute towards the application of the unique properties of camel HCAbs in the field of antibody-based therapy for the treatment of asthma and allergy.

Keywords: Camels, Antibodies, Immunoglobulin E, Escherichia coli, DNA, Recombinant protein, Antibody-based therapy.