Time filter

Source Type

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.

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. Source

Azawi O.I.,University of Mosul | Ismaeel M.A.,University of Tikrit
Reproduction in Domestic Animals | Year: 2012

The objectives of the present study were to determine the effects of season on some semen parameters and bacterial contamination of Awassi ram semen. Semen samples from six mature Awassi rams were used in this study. Semen collection was performed with artificial vagina every week, from September 2009 to October 2010. Volume, sperm concentration, mass motility, individual motility, percentage live sperm and sperm abnormalities were evaluated. Moreover, determination of viable bacterial count of the rams was also recorded weekly. Higher (p<0.05) semen volume in the hot summer and spring months was observed of August (1.55±0.08ml) and March (1.27±0.15ml). Sperm concentration was highest (p<0.05) in the breeding season (late summer to early autumn) of September (4.21±0.86×10 9 sperm/ml). Sperm individual motility and percent of live sperm observed in August (summer) and May (end of spring) when the environmental temperature started to increase were recorded highest values and differed significantly (p<0.05) from December and January (winter). The highest value of the mean sperm acrosomal defects (13.33±0.63%) was recorded in December. The highest value of the mean viable bacterial count (138.3±21.6) was recorded in July (summer). A significant decrease (p<0.01) in the mean viable bacterial count was observed from the middle of winter towards the end of spring. The lowest bacterial count was noted in January (60.5±2.98). It could be concluded from the results of the present study that there is an effect of season on ram semen quality, and summer high temperature in northern Iraq has no effect on Awassi ram semen. There is a significant effect of season on bacterial count on Awassi ram semen. © 2011 Blackwell Verlag GmbH. Source

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. Source

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. Source

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. Source

Discover hidden collaborations