Koya University is located in Koy Sanjaq, near Arbil , capital of Kurdistan Region of Iraq. It was established in 2003 The university included six colleges: Engineering, Agriculture, Science, Law, Arts, and Education.Right after the uprising of March 1991 and the liberation of large parts of Iraqi Kurdistan, a climate of freedom and democracy prevailed. The long-standing dream of the Kurdish people which was seen in forming Parliament as well as Kurdistan regional government came true. Kurdistan regional government as its national duty played a vital role in setting up civil institutions generally and academic institutions specifically. In addition to developing Salahaddin University, the government began re-opening Sulaimany University and established Duhok University.Continuing to attach further importance to higher education as a topical and scientific urgency, the Kurdistan regional government opened both colleges of Education and Sharia and Law during the academic year 2000-2001 in Koya which were affiliated to Sulaimany University. Later, they became the foundation stone of Koya University with the direct support and assistance of his Excellency Mr. Jalal Talabani, Iraqi president, which led to the establishment of Koya University, promising a fresh horizon to the people of Kurdistan. Thus, on 11 October 2003 in the presence of the president, the Prime Minister, the ministers, local dignitaries, students and teachers, the foundation of Koya University was laid by Jalal Talabani.In accordance with the ministerial order issued by the Ministry of Higher Education and Scientific Research1 2004 and in compliance with the article of Council of Ministers Presidency order no. on 29 November 2003 Koya University was established for the academic year.At the end of academic year 2003-2004, the first graduation session of Koya University was held on July, 20th, 2006. Wikipedia.
Hamawand I.,University of Southern Queensland |
Yusaf T.,University of Southern Queensland |
Rafat S.,Koya University
Energies | Year: 2013
This paper addresses recycling of waste engine oils treated using acetic acid. A recycling process was developed which eventually led to comparable results with some of the conventional methods. This gives the recycled oil the potential to be reused in cars' engines after adding the required additives. The advantage of using the acetic acid is that it does not react or only reacts slightly with base oils. The recycling process takes place at room temperature. It has been shown that base oils and oils' additives are slightly affected by the acetic acid. Upon adding 0.8 vol% of acetic acid to the used oil, two layers were separated, a transparent dark red colored oil and a black dark sludge at the bottom of the container. The base oils resulting from other recycling methods were compared to the results of this paper. The comparison showed that the recycled oil produced by acetic acid treatment is comparable to those recycled by the other conventional methods. © 2013 by the authors.
Chaqmaqchee F.A.I.,Koya University
Optoelectronics and Advanced Materials, Rapid Communications | Year: 2016
The quaternary of GaAsSbN capping layer (CL) and GaAsSb/GaAsN CL InAs/GaAs quantum dots (QDs) and the GaInNAs/GaAs quantum wells (QWs) VCSEL samples were grown by molecular beam epitaxy (MBE). Photoluminescence (PL) measurement was performed for InAs/GaAs QDs with two different CLs at low temperature, while PL was carried out for GaInNAs/GaAs QWs VCSELs at various temperatures. In addition, Integrated intensity of electroluminescence (EL) for the QWs VCSEL were measured under continuous-wave (CW) and pulsed conditions to reach emission wavelength at around wavelength of λ=1.28 µm for optoelectronics applications. Thus, a low temperature red shift was achieved using GaAsSbN CL and InAs/GaAs QD but in low intensity. In addition, amplification was observed by QWs devices at low temperature of T=77K. © 2016, National Institute of Optoelectronics. All rights reserved.
Ismail A.A.,Koya University
Mental Health, Religion and Culture | Year: 2015
The aim of this study was to find out methods of coping used most frequently by Kurdish adolescents and to investigate the relationship of methods of coping with their level of religiosity and gender. A convenience sample of 171 secondary school students, self-identified as Muslims, took part in answering two sets of questionnaires: methods of coping and religious commitment. Means, standard deviations, t-test and Pearson Correlation Coefficients were used to analyse the data. Results of the study suggest that the method of coping used most frequently by the sample was spiritual connection while passivity and avoidance were the least used methods of coping. Religiosity was correlated with all other methods of coping except seeking social support and passivity. Girls used avoidance and passivity for coping more than boys did. Kurdish Muslim adolescents use various methods to cope with problems they face. Counsellors in secondary schools should pay more attention to maladaptive methods of coping particularly among girl adolescents. © 2015 Taylor & Francis.
Fadhil B.M.,Koya University
International Journal of Mechanical and Materials Engineering | Year: 2012
A 3D finite element model has been developed in this paper for ballistic impact on ceramic targets with three different thicknesses (4, 7,10mm) by three different nose projectiles (ogival, flat and hemispherical). The ceramic is modeled with a polynomial equation of state (EOS) using Johnson- Holmquist for the strength and JH1 for the failure model while the steel projectile is modeled with EOS shock type and Johnson-Cook Strength. This work investigates the influence of projectile head shape and the ceramic thickness on ballistic performance. It is found that the residual velocities and the amount of erosion that the projectile suffered are strongly affected by the shape of projectile head. Also the increasing the ceramic thickness leads to an increase the erosion rate and erosion amount, besides in increase in the absorbed energy.
Muhammad F.F.,Koya University
Journal of Materials Science: Materials in Electronics | Year: 2016
In this work the impedance spectroscopy of α,ω-dihexyl-sexithiophene: methanofullerene; [6,6]-phenyl C61 butyric acid methyl ester (DH6T:PCBM) bulk heterojunction with and without incorporating tris (8-hydroxyquinolinate) gallium (Gaq3) was investigated in the frequency range from 50 Hz to 1 MHz. An electrical circuit was proposed to model the experimental results and to fit the data. The results showed that incorporation of Gaq3 has led to improve the interfaces between DH6T:Gaq3:PCBM moieties. The relaxation time for the Gaq3 incorporated heterojunction was found to be larger than that of the non-incorporated Gaq3 one, which implied a greater possibility for electrons and holes to transport before they relapse or recombine together. The dielectric loss in the Gaq3 incorporated DH6T:PCBM was found to be smaller than that of the non-incorporated one. This was attributed to the improved pathway for charge carriers to transport upon the addition of Gaq3. A peak in the dielectric loss was noticed for 25 % Gaq3 doped DHT:PCBM at about 106 Hz, suggesting the occurrence of dipolar relaxation. The results were analyzed and discussed based on the experimental and modelling investigations. © 2015, Springer Science+Business Media New York.
Muhammad F.F.,University of Malaya |
Muhammad F.F.,Koya University |
Sulaiman K.,University of Malaya
Materials Chemistry and Physics | Year: 2011
In this study we report the optical, spectroscopic, and structural properties of vacuum deposited tris (8-hydroxyquinolinate) gallium film upon thermal annealing in the temperature range from 85 °C to 255 °C under a flowing nitrogen gas for 10 min. The optical UV-vis-NIR and luminescence spectroscopy measurements were performed to estimate the absorption bands, optical energy gap (Eg), and photoluminescence (PL) of the films. Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) techniques were used to probe the spectroscopic and structural nature of the films. We show that, by annealing the films from 85 °C to 235 °C, it is possible to achieve an enhanced absorption and increased photoluminescence to five times stronger than that of the pristine film. The PL quenching at 255 °C was attributed to the presence of plainer chains allow easy going for excitons to a long distance due to the crystalline region formation of α-Gaq3 polymorph. The reduction in Eg and infrared absorption bands upon annealing were referred to the enhancement in π-π interchain interaction and conformational changes by re-arrangement of the Gaq3 quinolinate ligands, respectively. Stokes shift for the films were observed and calculated. From the differential scanning calorimetry, DSC measurements, higher glass transition temperature was observed for Gaq3 (Tg = 182 °C) compared to that of Alq3 (Tg = 173 °C), which suggests the existence of stronger dipolar interaction in Gaq3 due to the Ga3+ cation effect, in comparison to that of Alq3. © 2011 Elsevier B.V. All rights reserved.
Hamawand I.,Koya University
International Journal of Engineering, Transactions B: Applications | Year: 2011
It is important in the design of a drying system to evaluate the sticking behaviour of the materials being dried. A new approach to the sticking issue is applied in this study by carrying out a sticking test for the liquid associated with the materials under study. It was found that the liquid bridge is responsible for the initial sticking of the materials to the contact surfaces. The colloidal material in this liquid is eventually responsible of building a sticky solid bridge during drying. The glass transition temperature for the Brewers Spent Grain (BSG) particles and the colloidal solution expelled from these particles were tested using Differential Scanning Calorimetric (DSC). However, the chopped BSG particles showed no glass transition temperature; there were an appreciable number of particles stuck to the rotary drum dryer and the sample holders during drying. The colloidal particles in the liquid bridge were filtered and concentrated through evaporation and then analysed by DSC where they showed a glass transition temperature at (-23) and (-33) °C. In addition, the associated liquid thus prepared showed a honey consistency and a sticky touch when concentrated. These two properties are indications that this colloidal material may be responsible for sticking the BSG to the steel surfaces during drying.
Abdulrahman R.K.,Koya University |
Sebastine I.M.,Tesside University
Journal of Natural Gas Science and Engineering | Year: 2013
Natural gas is the most important and popular fossil fuel in the current era and future as well. However, because the natural gas is existed in deep underground reservoirs so it may contain several non-hydrocarbon components for example, hydrogen sulphide and carbon dioxide. These impurities are undesirable compounds and cause several technical problems for example, corrosion and environment pollution. Recently, the Iraqi Kurdistan region has achieved huge development in many fields for example, education, economic and oil and gas industry. In fact, Khurmala dome is located in southwest Erbil- Kurdistan region. The Kurdistan region government has paid great attention for this dome to provide the fuel for Kurdistan region. However, the Khurmala associated natural gas is currently flaring at the field. Moreover, nowadays there is a plan to recover and trade this gas and to use it either as feedstock to power station or to sell it in global market. However, the laboratory analysis has showed that the Khurmala natural gas has huge quantities of H2S about (5.3%) and CO2 about (4.4%). Therefore, this study aims to simulate the prospective Khurmala gas sweetening process by using the latest version of Aspen HYSYS V.7.3 program. Moreover, the simulation work is adopted amine gas sweetening process by using DEA solution and it achieved high acid gases removal for instance, H2S concentration in sweet gas stream was about 4ppm at (400m3/h) amine circulation rate. In addition, the simulation work is also achieved process optimization by using several amine types and blends for example, MEA and MDEA. It also examined some of the critical amine process factors for each amine type for example, amine circulation rate and amine concentration. Moreover, the optimization work found that the use of (DEA 35% w/w) may consider the most recommended process. © 2013 Elsevier B.V.
Darwesh A.K.,Koya University
WIT Transactions on Ecology and the Environment | Year: 2014
Oil well drilling operation is the subject of many activities, and for each part of its works and activities there is a particular tender for time schedule, quality and cost. I want to go back over an event which began in 2009 and finished 15 months later after continuous operation; the Bazian exploration oil well, Bn-1. As far as I am concerned, the most important point that I want to convey is the relation between the three main points above, giving attention to these aspects and asking some questions in this regard, which will be easy for me to answer because I was working there and I was a part of those operations. New technology, a professional team, logistic support, security, skilled staff and team work were all main elements hidden within the above-mentioned main activities. The aforementioned uses only a normal running of casing pipes, and these operations will normally take one day, but in the Bazian Bn-1 exploration oil well the time taken was more than one month. In this paper I want to make a very quick review of most of the operations performed for running 9-5/8” casing for the interval from 1195m to 2028m, which will clearly show that after three attempts we were not able to run the casing 100% as planned, and I will provide a technical recommendation for future operations in a similar situation. © 2014 WIT Press.
Quade N.,Helmholtz Center for Infection Research |
Huo L.,Saarland University |
Rachid S.,Saarland University |
Rachid S.,Koya University |
And 2 more authors.
Nature Chemical Biology | Year: 2012
Polyketides are structurally diverse and medically important natural products that have various biological activities. During biosynthesis, chain elongation uses activated dicarboxylic acid building blocks, and their availability therefore limits side chain variation in polyketides. Recently, the crotonyl-CoA carboxylase-reductase (CCR) class of enzymes was identified in primary metabolism and was found to be involved in extender-unit biosynthesis of polyketides. These enzymes are, in theory, capable of forming dicarboxylic acids that show any side chain from the respective unsaturated fatty acid precursor. To our knowledge, we here report the first crystal structure of a CCR, the hexylmalonyl-CoA synthase from Streptomyces sp. JS360, in complex with its substrate. Structural analysis and biochemical characterization of the enzyme, including active site mutations, are reported. Our analysis reveals how primary metabolic CCRs can evolve to produce various dicarboxylic acid building blocks, setting the stage to use CCRs for the production of unique extender units and, consequently, altered polyketides. © 2011 Nature America, Inc. All rights reserved.