Tikrit, Iraq

University of Tikrit

Tikrit, Iraq

The University of Tikrit is an Iraqi university located in Tikrit, Saladin Province, Iraq. It was established in 1987. It is one of the largest universities in Iraq with over 12,000 students. While it has faced challenges in recent years due to the conflict that has engulfed Iraq, it has begun to reemerge as a respected institution of higher education. It has sought to partner with other universities around the globe in an effort to reconnect its faculty and students to a global network. Wikipedia.

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Tawfeeq N.N.,University of Tikrit
International Journal of Electrical and Computer Engineering | Year: 2017

Microwave engineers have been known to designedly created defects in the shape of carved out patterns on the ground plane of microstrip circuits and transmission lines for a long time, although their implementations to the antennas are comparatively new. The term Defected Ground Structure (DGS), precisely means a single or finite number of defects. At the beginning, DGS was employed underneath printed feed lines to suppress higher harmonics. Then DGS was directly integrated with antennas to improve the radiation characteristics, gain and to suppress mutual coupling between adjacent elements. Since then, the DGS techniques have been explored extensively and have led to many possible applications in the communication industry. The objective of this paper is to design and investigate microstrip patch antenna that operates at 2.4 GHz for Wireless Local Area Network WLAN IEEE 802.11b/g/n, ,Zigbee, Wireless HART, Bluetooth and several proprietary technologies that operate in the 2.4 GHz band. The design of the proposed antenna involves using partially Defected Ground Structure and circular/cross slots and compare it to the traditional microstrip patch antenna. The results show improvement in both the gain of 3.45 dB and the S11 response of -22.3 dB along with reduction in the overall dimensions of the antenna. As a conclusion, the performance of the antenna has been improved through the incorporation with the DGS and slots structures regarding the S11 response and the gain. The proposed antenna become more compact. Finally, the radiation pattern of proposed antenna has remained directional in spite of adding slots on the ground plane. Copyright © 2017 Institute of Advanced Engineering and Science. All rights reserved.

Objective: The goal of the present work was loading salbutamol sulphate into microparticles consist of sodium alginate/polyethylene glycol 6000 blend to deliver it locally into the respiratory system. Method: Procedure employed involves melting, blending, freezing, powdering and sieving to get microparticles suitable for inhaling. Results: Formula consists of 1:1 hydrophilic polymers ratio was showing the least drug percent release (85.239% after 6h). The dug release kinetic was best fit with Korsmeyer-Peppas model and the drug release mechanism was Fickian. Both cross-linking agent (calcium chloride) and sodium alginate amount affect the particle size and the particle surface feature and was proved by the optical and electron microscopes. Fourier transform infrared spectroscopy revealed that some peaks disappearance and/or shifting may be due to H-bonding between the drug and either and/or both polymers, whereas; the X-ray diffraction spectroscopy shows that the amorphous nature of sodium alginate affects peak clarity of the drug. Out of eleven formulations, F6 provide the optimum drug sustained release. Conclusion: A hydrophilic drug release can be controlled and prolonged by loading it within a hydrophilic matrix.

Ahmed H.H.,University of Tikrit
Materials Science in Semiconductor Processing | Year: 2017

Nanostructures of CdO thin films are prepared by chemical bath deposition (CBD) technique. The synthesized film is annealed in static air by using the hotplate at 373, 473, 573 and 673 K for 10 min. The effect of annealing temperature on structural, morphological, optical and electrical properties of CdO thin films has been investigated. The prepared thin films are characterised by X-ray diffraction (XRD), atomic force microscope (AFM), optical reflection microscope (ORM), UV–Visible Spectrophotometer and electrical resistivity. XRD shows the emergence of the cubic phase of CdO film in a preferred orientation (111) plane at 573 K. The AFM and ORM show that CdO films have smooth homogeneous surface in the formula with the emergence of nanoclusters gathering as nanoparticles with the average of grain size about 100 nm at 573 K. The optical properties prove that deposited films have high transparency within the visible range of the spectrum that reaches to more than 85% with a wide band gap that extends from 2.42 eV to 2.7 eV. The electrical properties of the CdO films show that resistivity decreases with increased annealing temperatures. In addition, it is proved that more than one activation energy appears and they change according to the temperature of annealing and this comes as a result of the polycrystalline structure. This study indicates that the properties of CdO thin films could be improved with annealing temperature and these films can be used in many technological applications. © 2017 Elsevier Ltd

Ahmed S.A.,University of Tikrit
Asian Journal of Chemistry | Year: 2013

1,3,3,5,5-Pentachloro-1-mono(2-amidopyridine)cyclotriphosphazene was prepared from hexachlorocyclotriphosphazene and 2-amino pyridine in acetone. The structure of the white crystals of the prepared compound was elucidated by the X-ray diffraction and supported by the FTIR and 1H, 13C, 31P NMR spectroscopy. Since the X-ray diffraction is not accurate in detecting the position of the hydrogen atoms, Density functional theory (B3LYP) was used to study the structure and the spectroscopic properties of the compound and its tautomers that belong to the hydrogen tautomerism. Calculations have shown that the isomer in which the hydrogen attached to the nitrogen atom of the amido nitrogen that attached to the pyridine ring has the lowest energy and that comes in accordance with 1H NMR and FTIR spectroscopy. Potential energy curve with calculated activation energy is reported.

Hassan N.K.,Universiti Sains Malaysia | Hassan N.K.,University of Tikrit | Hashim M.R.,Universiti Sains Malaysia
Journal of Alloys and Compounds | Year: 2013

Ultra violet photodetector based on flake-like ZnO with different flakes density were electrochemically deposited on silicon Si (111) substrate were fabricated. The deposition time greatly affected the shape, density and size of the flake, thereby altering its optical properties. The structural and optical properties of the fabricated nanostructures revealed ZnO structures with single crystalline hexagonal wurtzite containing two photoluminescence spectrum peaks at a near-band-edge emission in the ultraviolet region and a broad deep-level emission around the green emission. These peaks were affected by the period of deposition. The crystallinity of materials and the defects in the crystal structure were studied through Raman spectroscopy. Current voltage results showed that the flakes density greatly affected the ultra violet detection. Our results showed that photoresponse properties of the photodetectors strongly depend on the flakes density. The sharper flakes with high density exhibited enhanced UV detection performance, high sensitivity and shortened rise times compared to lower ones. We showed that photodetectors based on sharp, highly dense ZnO nanoflakes have a faster response than ones based on larger and lower density of ZnO nanoflakes. © 2013 Elsevier B.V. All rights reserved.

Gaied K.S.,University of Tikrit
Transactions of the Institute of Measurement and Control | Year: 2015

This paper presents a wavelet-based prognosis technique for fault-tolerant control (FTC) of an induction motor (IM) drive. The wavelet is used for analysis in fault detection due to its good filtering characteristics, localized capability and superior de-noising. The fault-tolerant algorithm is applied to a 1-kW IM to maintain the performance of the machine at an acceptable level. The FTC algorithm has been implemented in a new topology to ensure the best performance recovery in case of open and short stator winding faults, as well as speed sensor faults. In the worst-case scenario of operation, a protection stage has been implemented to stop motor operation. Experimental results demonstrate the reliability and effectiveness of the technique for diagnosis and prognosis of stator and speed sensor faults. The Texas Instrument TMS 320F28335 is used for the real-time implementation of the proposed wavelet-based prognosis and the FTC of the IM drive under different fault situations. © The Author(s) 2014.

Faisal S.M.,University of Tikrit
European Journal of Scientific Research | Year: 2011

This research deals with different structure form of insulator such as (Pin Post , Clamp top and Tie top ). These structure are applied in covered and stripped state. The finite element analysis (FEA) program Quick field was used to describe the electric field surrounded the ceramic insulator ,Also the leakage currents of insulator are measured. The results show that Pin post insulators have a leakage current and electric field larger than both clamp top and tie top. The clamp top and tie top insulator show almost the same value of leakage current measurements and the highest electric field is exits near the HV end of the insulator. © EuroJournals Publishing, Inc. 2011.

Lateef K.H.,University of Tikrit
European Journal of Scientific Research | Year: 2011

Assessing of water quality status for special use is the main objective of any water quality monitoring study. Water quality index (WQI) is a mathematical tool used to transform large quantities of water quality data into single number which represents water quality level. This research paper is accomplished to evaluate the quality of groundwater in Tikrit and Samarra cities-Iraq for the purpose of drinking water by using Water Quality Index (WQI). WQI requires several parameters to satisfy the calculations. These parameters include physical and chemical characteristics of groundwater sampling. The results showed that 9 wells which are lies in the cities center fall in class III (poor water) according to WQI while one well fall in class IV (very poor water) which is lies in south of Samarra. Also this study concluded that the groundwater quality of Tikrit is better than Samarra depending on the evaluation of WQI for the purpose of drinking water. © EuroJournals Publishing, Inc. 2011.

Al-Dury S.A.O.,University of Tikrit | Al-Jibori S.A.,University of Tikrit
Oriental Journal of Chemistry | Year: 2012

Tetrahedral mercury(II) complexes of the types [HgCl(sac)(PPh 3) 2], [HgCl(sac)(diphos)], [Hg(sac) 2(PPh 3) 2] or [Hg(sac) 2(diphos)] and octahedral complexes of the type [Hg(sac) 2(dppe) 2] or [Hg(sac) 2(dppp) 2] {diphos = Ph 2P(CH 2) nPPh 2; n=1, dppm; n=2, dppe; n=3, dppp; n=4,dppb} were prepared and characterized by molar conductance, elemental analysis, infrared spectra, 1H and 31P-( 1H) nmr data.

Alobaidi A.H.A.,University of Tikrit
Anti-Inflammatory and Anti-Allergy Agents in Medicinal Chemistry | Year: 2014

Dyslipidemia plays an important role in the provocation of cardiovascular disease. Psoriasis was associated with metabolic disorder and therefore the present study was performed to evaluate the therapeutic effect of combination of blackseed with garlic as a treatment for dyslipidemia. A randomized, double-blind, placebo controlled, two arms parallel study consisted of 4 week diet stabilization period that included a 4 week base line evaluation phase, followed by an 8 week treatment period. The study comprised men (n=127) and women (n=131) aged 24 to 57 years, who met the NCEP ATP III criteria for drug treatment of hyperlipidemia and dietary intervention. Three hundred patients were randomized to treatment and 258 completed the study. The lipid profile included total cholesterol, HDL-C, Non-HDL-C, LDL-C, and Triglyceride. There were no significant differences between the two treatment groups at the baseline for triglyceride, HDL, Non-HDL, LDL and total cholesterol. Following 8 weeks treatment with simvastatin plus placebo the reduction in Non-HDL, triglyceride, LDL and total cholesterol following treatment course was statistically highly significant (P= <0.01). However, the increase in HDL was significant (P=0.02). Patients who received simvastatin, plus black seed and garlic for 8 weeks of treatment show significant differences between baseline and after treatment course for all tested profiles (P=<0.01). This comparison of mean values reveals a high significant difference (P=<0.01) for cholesterol, triglyc-eride, Non-HDL, and LDL, and significant difference (P=0.03) for HDL between the two treatment groups. This study suggests that the evaluated combination was effective in correction of dyslipidemia. Large scale clinical trials comparing different doses are warranted. © 2014 Bentham Science Publishers.

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