Modeling and simulation of a 3-ф induction motor based on two types of WFA

This paper has been proposed to simulate the transient model of 3-Ф cage rotor induction motor based on winding function approach (WFA). According to this method the motor is assumed to be consist of an electrical circuits on both stator and rotor. The magneto motive forces (MMF) that have been generated by these circuits play a role for coupling them together. Then mutual and self-inductances will be easily computed using WFA. Two types of WFA have been used to build and simulate the model of the induction motor. In the one part type, it’s assumed that the coupling MMF between stator and rotor have a non-sinusoidal shapes according to the actual windings distribution over the motor slots. While in second part type the generated MMF in are assumed to have sinusoidal waveform. The suggested models may be used to simulate the dynamic as well as steady state performance of a faulty and non-faulty motor. A simulation of the suggested models that consists of m-rotor bars and n-stator phases multiple coupled circuit-based has been performed using matlab m.file and the results of the motor current have been proved in its nonlinear way by using WFA

The Effect of Some Biochemical and Physiological Parameters in Iraqi Patients with Renal Failure

Background: Renal failure occur when the kidneys are unable to bring out the body's metabolic wastes or proceed their regulatory assignment. Objective The study was designed to compere some biochemical and hematological parameters in patents with renal failure and control group. Patients and materials: A case-control study was conducted from September 2018 t0 April 2019 on patients attending the artificial Kidney Unit in Al-Hussein Hospital in holy Karbala Governorate. A total of fifty known cases of renal failure and fifty health persons were selected. Blood samples were taken from both (patients and control) to estimate biochemical and hematological parameters by using specific methods. Results: the results of this study found the high increase (P˂0.05) in concentration of blood urea, serum creatinine, and calcium levels, a significant decreases (P ≤ 0.05) in (Hb) and (PCV) in patients while (ESR) rate were significantly increased (P ≤ 0.05) in these patients when compared to healthy control. Conclusion: In this study conclude that the biochemical parameters are more efficient than hematological parameters in follow-up cases of patients with renal failure. Keywords: Renal failure, parameters, Urea, Creatinine, Calcium. DOI: 10.7176/JBAH/10-14-04 Publication date:July 31st 202

Multiplex polymerase chain reaction identification of Candida species colonized sputum of patients suffering from various respiratory tract disorders in Duhok, Iraq

Background: Candida species are part of the body normal flora. Under certain conditions, these opportunistic microorganisms may lead to infection. The purpose of this study was to identify Candida species isolated from sputum from patients suffering from respiratory tract disorders.Methods: A total of 59 sputum samples taken from patients attending Azadi hospital at Duhok province, Kurdistan Region/Iraq. For primary isolation, sputum samples were cultured on sabouraud dextrose agar (SDA). Suspected colonies of Candida isolates were then sub cultured on chromogenic Candida agar for presumptive identification. Genomic DNA extraction was performed using a genomic DNA extraction kit. For rapid identification of Candida spp, specific primers based on the genomic sequence of DNA topoisomerase 11 of C. albicans, C. parapsilosis I, C. parapsilosis II, C. guilliermondi, C. dubliniensis, C. krusei, C. kefyr and C. glabrata, C. tropicalis I, C. tropicalis II, C. lusitaniae were used. The Multiplex PCR products were separated by electrophoresis in 1.5% agarose gel, visualized by staining with ethidium bromide, and photographed.Results: Three Candida species namely C. albicans, C. glabrata and C. tropicalis were differentiated by their colour produced on Chromogenic Candida agar. PCR with the primer mixes yielded 4 different sized of PCR products corresponding to C. albicans, C. glabrata, C. Keyfer and C. tropicalis II, C. glabrata was the most common species (33.33%), followed by C. albicans (16.66%). The highest rate of isolation of Candida species was between the ages of 36 to 45.Conclusion: This study concluded that phenotypic characteristics on selective agar medium such as chromogenic Candida agar are useful for presumptive identification of Candiada spp with the support of molecular method such as multiplex PCR.

Identification of Candida spp. isolated from vaginal swab by phenotypic methods and multiplex PCR in Duhok, Iraq

Background: Candida species are the second most common cause of vulvovaginitis worldwide. The purpose of this study was to identify the species of vaginal Candida isolates by using phenotypic and Multiplex PCR techniques.  Methods: 91 isolates from patients admitted to Azadi hospital and Maternity hospital in Duhok city were collected. The vaginal swab specimens were inoculated on Sabouraud dextrose agar. Colonies were then sub cultured on Chromogenic Candida agar. Genomic DNA extraction was performed using a Genomic DNA Extraction kit. For rapid identification of Candida spp., specific primers based on the genomic sequence of DNA topoisomerase 11 of C. albicans, C. parapsilosis I, C. parapsilosis II, C. guilliermondi, C. dubliniensis, C. krusei, C. kefyr and C. glabrata, C. tropicalis I, C. tropicalis II, C. lusitaniae were used. The multiplex PCR products were separated by electrophoresis in 1.5% agarose gel, visualized by staining with ethidium bromide, and photographed.  Results: 4 Candida species, namely C. albicans, C. glabrata, C. krusei and C. tropicalis were distinguished by Chromogenic Candida agar on the basis of colony colour and morphology. PCR with the primer mixes yielded 7 different sized of PCR products corresponding to C. albicans, C. guilliermondii, C. dubliniensis, C. glabrata, C. kefyr, C. krusei and C. tropicalis II. The analysis revealed C. glabrata and C. albicans were the most common species isolated with the percentage 40% and 30% respectively.Conclusions: This study concluded that phenotypic characteristics on selective agar medium such as chromogenic candida agar are useful for presumptive identification of Candiada spp. with the support of molecular method such as multiplex PCR.  

Synthesis of Novel (Polymer Blend-Titanium Carbide) Nanocomposites and Studying their Characterizations for Piezoelectric Applications

ان المواد المتراكبة الكهروضغطية مهمة جدا" لتطبيقات عديدة منها: متحسسات الضغط. لذلك تم تصنيع المتراكبات النانوية (بولي فينيل الكحول- بولي فينيل بيروليدون- كاربيد التيتانيوم) ودراسة خواصها التركيبة، الكهربائية، العزلية والبصرية. درس تاثير اضافة جسيمات TiC النانوية على الخواص التركيبية، الكهربائية، العزلية والبصرية للخليط البوليمري. بينت النتائج ان التوصيلية الكهربائية للمتراكبات النانوية (PVA-PVP-TiC) تزداد مع زيادة تركيز جسيمات TiC النانوية عند درجة حرارة الغرفة. اختبار FTIR اوضح عدم وجود تفاعلات بين الخليط البوليمري (PVA-PVP) و جسيمات TiC النانوية. بينت الدراسات العزلية ان ثابت العزل والفقدان العزلي للمتراكبات النانوية يزدادان مع زيادة تراكيز جسيمات TiC النانوية ويقلان مع زيادة التردد. وان التوصيلية الكهربائية المتناوبة تزداد مع زيادة تراكيز جسيمات TiC النانوية والتردد.اوضحت  نتائج الخواص البصرية ان الامتصاصية البصرية  للخليط البوليمري (PVA-PVP) تزداد مع زيادة تركيز جسيمات TiC النانوية. وان الثوابت البصرية تغيرت مع زيادة تركيز جسيمات TiC النانوية. بينت نتائج تطبيق الكهروضطية للمتراكبات النانوية (PVA-PVP-TiC) ان المقاومة الكهربائية للمتراكبات النانوية   (PVA-PVP-TiC) تقل مع زيادة الضغط مما يجعلها مناسبة لتطبيقات الكهروضغطية او متحسسات الضغط.  Piezoelectric nanocomposites are very important for many applications as a pressure sensors. Fabrication of (polyvinyl alcohol - polyvinyl pyrrolidinone -titanium carbide) nanocompos- ites and study their structural, electrical, dielectric and optical properties have been in- vestigated. The effect of adding the TiC nanoparticles on structural, electrical, dielectric and optical properties of polymeric blend has been studied. The results showed that the electrical conductivity of (PVA-PVP-TiC) nanocomposites is increasing with the increase of TiC nanoparticles concentrations at room temperature. The FTIR analysis showed there is no interactions between (PVA- PVP) polymer blend and TiC nanoparticles. The dielectric studies showed the dielectric constant and dielectric loss of nanocomposites increase with the increase of TiC nanoparticles concentrations and they decrease as frequency increased. The A.C electrical conductivity increases with the increase of TiC nanoparticles concentra- tions and frequency. The results of optical properties showed that the optical absorbance of (PVA- PVP) polymer blend increases with the increase of TiC nanoparticles concentrations. The optical constants change with increase in TiC nanoparticles concentrations. The piezo- electric application results of (PVA-PVP-TiC) nanocomposites showed that the electrical resistance of (PVA-PVP-TiC) nanocomposites decreases with an increase of the pressure which make it is suitable for piezoelectric applications or pressure sensors

Study the Behavior of High Performance Concrete Circular Short Columns Confined by CFRP

This paper presents the results of experimental study on reinforced concrete columns rehabilitation with carbon fiber reinforced polymer (CFRP) under concentrated load. Twelve short circular reinforced concrete columns (150 mm diameter and 600 mm height) were tested. Three specimens were unstrengthening and tested until failure as control specimens. Nine specimens were rehabilitation by carbon fiber reinforced polymer after loading about 75% from ultimate axial load capacity of control specimens. The test parameters were the type of concrete are normal strength concrete (NSC), high performance concrete (HPC) and high performance concrete containing engine oil (HPCEO) in additional to effective the ratio CFRP confining (fall wrap (100%strengthening), 50mm strips wrap 50mm spacing (50%strengthening)and 40mm strips wrap-60mm spacing(40%strengthening)). Test results showed that Adding used engine oil to concrete have significantly effect on workability of concrete where work as plasticizer. HPCEO mix showed lower strength (compressive, splitting tensile and flexural) and ultimate axial load of column than those HPC mix but greater than NSC mix. Where the compressive strength of concrete was (27.3 MPa, 45.8 MPa and 69.7 MPa) for NSC, HPCEO and HPC respectively. The ultimate axial load capacity of unconfined reinforced concrete columns was (52 ton, 78 ton and 117 ton) for NSC, HPCEO and HPC respectively. Reducing efficiency of rehabilitation by CFRP with increasing in compressive strength of concrete. The ratios of increasing in ultimate axial load capacity of rehabilitation RC columns with 100% and 50% wrapping in comparison with 40%wrapping are 20% and 4% respectively for NSC, while these ratios become 15% and 5% respectively for HPCEO and for HPC , these ratios are 10%and 3% respectively

DNA minor groove binders-inspired by nature

The synthesis and biological activity of a variety of analogues to the naturally occurring anti-bacterial and anti-fungal Distamycin A were explored by a number of authors. These compounds were subject to a large array of assays. Some of these compounds showed high activity against a range of Gram-positive, Gram-negative bacteria as well as fungi. To explore the anti-parasitic activity of this class of compounds, specific modifications had to be made. A number of these compounds proved to be active against Trypanosoma brucei. The binding of a number of these compounds to short sequences of DNA were also examined using footprinting assays as well as NMR spectroscopy. Computer modelling was employed on selected compounds to understand the way these compounds bind to specific DNA sequences. A large number of variations were made to the standard structure of Distamycin. These changes involved the replacement of the pyrrole moieties as well as the head and tail groups with a number of heterocyclic compounds. Some of these MGBs were also investigated for their capability for the treatment of cancer and in particular lung cancer

Digital ethics in education: An examination of Omani information studies students’ ethical competencies during e-learning

Shifting to an e-learning style forced students to learn many skills and competencies to benefit from their experience in an e-learning environment. Ethical competencies play a crucial role in ensuring the fairness of students' assessments and the overall educational process. During the COVID-19 pandemic, the research used   a questionnaire to evaluate the ethical understanding of students enrolled in Sultan Qaboos University's Information Studies Department using a quantitative methodology. The findings of this study reveal a significant lack of basic ethical competencies among students in the e-learning environment which negatively impacts their educational experience. The responses obtained indicate a low level of awareness regarding ethical practices in e-learning   as well as a lack of knowledge concerning learning misconduct practices. The study suggests the implementation of an educational program that addresses academic ethical practices and e-learning misconduct across all educational levels. The outcomes of this research contribute to a better understanding of current e-learning practices among students, raise awareness about the importance of ethical competencies in e-learning   and provide guidance for students to develop ethical digital competencies

Analysis of Relationship Between Trade Policy Trends and Unemployment Rates in Iraq

Purpose: This research aims, to review trends of trade policy in Iraq.   Theoretical framework: identifying the extent of impact of alternative policies aimed at achieving productive diversification on unemployment rates in the long and short term.   Design/methodology/approach: The research sample included data to measure research variables for the period 2004-2020. The ARDL model was used to measure research variables.   Findings: The main conclusion that the trade policy in Iraq continued to operate in isolation from the rest of economic policies, in light of the continued dependence on oil sector and inflexibility of the production system, all of which led to the lack of diversification of economic activity and weaken contribution of non-oil production sectors in produce and creating jobs, which led to continuing dependence on imports and high unemployment rates.   Research, Practical & Social implications: the coordination between trade policy and the rest of economic policies are achieve a wide range of basic sustainable development goals, foremost of which is economic diversification in addition to increasing public revenues, creating opportunities, and diverse work in many fields.   Originality/value: The findings show that success of trade policy in achieving its goals, especially in terms of its ability to influence unemployment rates

Friedel-Crafts chemistry: Part 41. A new facile synthesis of indeno[1,2-c] pyrazoles, 2H-benzo[g]indazoles and benzo[6,7]cyclohepta[1,2-c]pyrazoles via Friedel-Crafts ring closures

Expedient and novel alternative synthesis of some fused heteropolycycles containing pyrazole moiety is described. A series of indeno[1,2-c]pyrazoles, 2H-benzo[g]indazoles and benzo[6,7] cyclohepta[1,2-c]pyrazoles were prepared by Friedel-Crafts ring closure of suitable synthesized carboxylic acids and alkanols in the presence of AlCl3/CH3NO2 or P2O5 or PPA (polyphosphoric acid) catalysts. The precursor acids were obtained by utilizing KMnO4 oxidation of the corresponding aldehyde, alkylations of diethyl malonates and Perkin type approaches, whereas starting alkanols were smoothly obtained by reaction of carboxylic acid ester with Grignard reagent. To exemplify, cyclizations of 5-chloro-1,3-diphenyl-1H-pyrazole-4-carboxylic acid (6) were accomplished using the above catalysts afforded 3-chloro-2-phenylindeno[1,2-c]pyrazol-4(2H)-one (1b). Similarly, cyclization of the 2-(5-chloro-1,3-diphenyl-1H-pyrazol-4-yl)propan-2-ol (8) by a Friedel–Crafts-type ring closure afforded the 3-chloro-2,4-dihydro-4,4-dimethyl-2-phenylindeno[1,2-c]pyrazole (1a)