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This study is concerned with the effect of adding two kinds of ceramic materials on the mechanical properties of (Al-7%Si- 0.3%Mg) alloy, which are zirconia with particle size (20μm > P.S ≥ 0.1μm) and alumina with particle size (20μm > P.S ≥ 0.1μm) and adding them to the alloy with weight ratios (0.2, 0.4, 0.6, 0.8 and 1%). Stirring casting method has been used to make composite material by using vortex technique which is used to pull the particles to inside the melted metals and distributed them homogenously.

After that solution treatment was done to the samples at (520ºC) and artificial ageing at (170ºC) in different times, it has been noticed that the values of hardness is increased with the aging time of the o

جاءت كلمة الأخلاقيات من الاخلاق وهي تعبير العملي للأديان، بمعنى الممارسة التداولية لقواعد الدين (السلوك والتطبيق العملي لمبادئ الأديان)، ولكن بعد الانقلابات الفكرية والفلسفية قي فترة ما بعد الحداثة أخذ هذا المفهوم ينزاح عن معناه الأولي ليقابل معنى القيد، أو الشروط القسرية التي تضمن الانتماء إلى مذهب، أو حزب، أو حركة فكرية أو التغبير عن أيديولوجيا محدد. بعبارة أخرى، لكل مذهب أو فكرة أو حزب أخلاقيات خاصة به

يتميز الشاعر (موفق محمد) من خلال خرق المألوف ووسيلتهُ الى ذلك بصمته الشعرية الإبداعية، فيسمو بلغتهِ الى الابداع والاختلاف عن طريق شحنها باللغة العامية المتداولة الدارج؛ لأنه لا يريد ان يكون نصهُ نخبوياً فقط، وانما يرغب في مشاركة الناس البسطاء معاناتهم ومتاعبهم وحياتهم اليومية، فنجده يقوم بتضمين التراكيب بمختلف انواعها من اهزوجة او اغنية او انشودة من التراث وغيرها... او المفردة العامية في قصيدته.

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The current research aims to diagnose the type and level of influence of social media, whose dimensions are represented by (attitudes towards social media marketing, knowledge and use of social media, influence on the Internet and social media, following up on social media) on customer behavior in its dimensions (attracting attention, raising Interest, desire creation, customer response), and the research sought to answer questions related to the research problem by testing the main hypotheses to explore correlations and influence between the two variables, and to achieve research hypothesis tests, the field study was used, as the research sample reached (135) individuals from the director and the assistant director And marketing personnel

 اثر التوظيف الاستراتيجي في تحقيق اهداف الدولة

This study aims at identifying the reality of alternative assessment for teachers of the first cycle of the basic education in the Sultanate of Oman with respect to the degree of teachers' use of alternative assessment strategies, level of self-efficacy for alternative assessment strategies, and attitude towards alternative assessment, and their relationship with other variables. To achieve the aims of the study, a descriptive research approach was utilized. A 5-point self-rated questionnaire was developed. It consists of three sections: Actual use of alternative assessment strategies (21 items), self-efficacy for alternative assessment strategies (21 items), and attitude towards alternative assessment (27 items). The psychometric proper

The importance of internal audit in the growing demand for services in the public and private economic units, and in the rapid growth of its systems professional, has also been recognition of the importance of internal audit quality and the quality of information provided in a long time, as well as the importance of achieving the greatest possible quality in his work to reduce accounting risks of financial reports misleading or fraudulent, which is one of the important features of the audit.

The internal audit quality are linked with the ability of auditors to detect errors in the financial statements, and their willingness to express an opinion technical neutral and non-aligned based on the results of th

أثار وجود المسؤولية التعاقدية إلى جانب المسؤولية التقصيرية خلافاً عميقاً في الفقه وصل إلى حد الدعوى إلى نبذ التقسيم التقليدي بين المسؤوليتين، والاكتفاء بقواعد موحدة تنظم أحكام المسؤولية المدنية، وقد تزايدت هذه الدعوات ووصلت ذروتها في كتابات الفقيه فيليب ريمي الذي دعا صراحة –وبأسلوب أخاذ – إلى إلغاء المسؤولية  التعاقدية، لذلك يجيء هذا البحث محاولة لاستعراض احدث الآراء الفقهية التي أنكرت وجود المسؤول

يعد التدخين من اكبر الآفات التي تعاني منها المجتمعات ويعد واحد من الاخطار الرئيسية التي تهدد صحة الانسان اذ تتعدى المشكلة الشخص المدخن والى حوله من غير المدخنين وينتقل عن طريق الهواء وينتج ما يعرف ب( التدخين السلبي ) .

و يؤثر التدخين سلباً على صحة الإنسان, وتؤكد الدراسات العلمية والأبحاث الطبية أن هناك ما لا يقل عن 90% من مرضى سرطانات الفم والبلعوم والحنجرة وغيرها هم من بين المدخنين, ومن المعروف أن خطورة ال

The crystalline zeolite, namely faujasite type Y with SiO2/Al2O3 mole ratio of 5 was used as raw material for preparation of isomerization catalysts. A 0.5 wt % Pt/HY-zeolite catalyst was prepared by impregnation of the decationized HY-zeolite with chloroplatinic acid. The dectionized HY-zeolite was treated with HCl, HNO3 and HI promoters using different normalities and with different concentrations of Sn, Ni and Ti promoters by impregnation method to obtain acidic and metallic promoters' catalysts, respectively. A 0.5 wt% of Pt was added to above catalysts using impregnation method. Isomerization of n-hexane was carried out at different prepared catalysts. The isomerization temperature varied from 250–325° C over weight hourly space

In the present paper, we will study the generalized ( p, q) -type and
generalized lower ( p, q) -type of an entire function in several complex
variables with respect to the proximate order with index pair ( p, q) are
defined and their coefficient characterizations are obtained.

In this study, genetic algorithm was used to predict the reaction kinetics of Iraqi heavy naphtha catalytic reforming process located in Al-Doura refinery in Baghdad.  One-dimensional steady state model was derived to describe commercial catalytic reforming unit consisting of four catalytic reforming reactors in series process.

The experimental information (Reformate composition and output temperature) for each four reactors collected at different operating conditions was used to predict the parameters of the proposed kinetic model. The kinetic model involving 24 components, 1 to 11 carbon atoms for paraffins and 6 to 11 carbon atom for naphthenes and aromatics with 71 reactions. The pre-exponential Arrhenius constants and a

The effect of time (or corrosion products formation) on corrosion rates of carbon steel pipe in aerated 0.1N NaCl
solution under turbulent flow conditions is investigated. Tests are conducted using electrochemical polarization
technique by determining the limiting current density of oxygen reduction in Reynolds number range of 15000 to 110000
and temperature range of 30 to 60oC. The effect of corrosion products formation on the friction factor is studied and
discussed. Corrosion process is analyzed as a mass transfer operation and the mass transfer theory is employed to
express the corrosion rate. The results are compared with many proposed models particularly those based on the
concept of analogy among momentum, heat,

The reclamation of makeup water is studied in terms of breakthrough time (i.e., the leakage of the cations). Makeup water was subjected to lab-scale ion exchangers of two types: strong acid cation and weak base anion exchanger. The experimental investigation was directed to study the ion exchanger performance in terms of four different parameters (i.e., copper concentration, total dissolved solids (TDS), feed rate and bed depth). Box-Wilson composite rotatable design was adopted in designing the experiments. Breakthrough times of the effluent stream are measured in terms of copper concentration of 2 to 25 ppm, TDS concentration of 250 to 1250 ppm, feed rate of 0.38 to 5.34 l/h and bed depth of 5 to 70 cm. Simulation the effect of the stu

The study of the dynamic behavior of packed distillation column was studied by frequency response analysis using Matlab program. A packed distillation column (80 mm diameter) (2000 mm height) filled with glass packing (Raschig Rings 10mm), packing height (1500 mm) has been modified for separation of methanol-water mixture (60 vol%). The column dynamic behavior was studied experimentally under different step changes in, feed rate (±30%), reflux rate (±22%), and reboiler heat duty (±150%), the top and bottom concentration of methanol were measured. A frequency response analysis for the above step response was carried out using Bode diagram, the log modulus and the phase angle were  used to analyze the process model. A Matlab progra

In the period after the collapse of the Soviet Union in 1991, the Federal Republic of Russia witnessed a setback in the overall strategic performance of the country, as it went through a stage of performance flop between the orientation towards Europe in the era of President Boris Yelsen (1991-1999), or the change of direction towards Eurasia, as the Russian Federation managed After President Vladimir Putin assumed power in 2000, from rebuilding the same state and preserving national unity and social cohesion, as well as building a phased military doctrine that made clear moves in Russian strategic thought and future directions towards regions of eternal importance in Russian strategic perception Lack of a set of motivations based on it:

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