This study investigates the instability of power-law fluids in a porous channel, emphasizing dual component convection influenced by gravity variations and vertical throughflow. A single-term Galerkin approximation is employed to derive critical Rayleigh numbers and neutral stability curves. The findings reveal that the power-law index tends to destabilize the system, affecting the neutral stability curves, while buoyancy forces contribute to enhancing stability. The role of gravity variations is highlighted as a critical factor, with exponential-type fluctuations proving more effective at achieving stability compared to linear-type fluctuations. Overall, the study emphasizes that key parameters, including the power-law index, buoyancy f

Throughout this paper, a new generalization of complex valued CR  -metric space is used. This definition was stated in published research as a previous work. In this paper, some new results on common best proximity points for non-self-mappings are obtained in these spaces. It is an extension of previous results proven in classical complex metric spaces. The requirements of the work are as follows: first, we present some equivalent statements for convergence and Cauchy sequences. Second, we define complex b- rectangular metric space by using the function distance of a recent space. Finally, we present the concepts of commute proximity, weak - property and weakly dominate mappings. These concepts are illustrated by some examples. Furtherm

MUC4, a type of reproductive mucus secreted by epithelial cells, can alter the uterine environment and weaken the epithelial lining, making it challenging for an embryo to implant. Furthermore, MUC4 has been linked to mature endometriosis, a condition that affects the uterus. As a result, abnormal mucus production led to female Infertility. The current study evaluates the association between mucin4, pri-miR146a, with Infertility by measuring the fold change in gene expression to improve IVF program in Iraqi medical centres. This was achieved by assessing a new parameter in 128 infertility women under IVF. The study included 84 infertile females: - 26 successful implantations, 58 failure failed implantations und

This study shows how the structural and dielectric properties of (SnO₂)_1-x(Mn₂O₃)_x, (where x=0.00, 0.03, 0.05,0.07, and 0.09) prepared using the solid state reaction technique, are affected by the doping of semiconducting metal oxide Mn₂O₃. Structural analysis of the composites was carried out using information from the composite samples obtained from X-ray diffraction (XRD). The diffraction peak shifting in XRD patterns indicated that Mn ions were successfully incorporated into the SnO₂ crystal lattice. Mn ions were successfully doped in the Tin oxide matrix lattice with the subsequent increase of doping levels. The average crystal size evaluated usi

     This study employed a simple hydrolysis method to synthesize two novel nanocomposites: ZnO/g-C₃N₄ (ZCN) and TiO₂/g-C₃N₄ (TCN). Characterization results confirmed the successful integration of ZnO and TiO₂ nanoparticles onto g-C₃N₄ nanosheets, resulting in enhanced optical absorption in the visible light region. Both synthesized ZCN and TCN composites exhibited higher photocatalytic degradation efficiency of the antibiotic doxycycline under visible light irradiation compared to their individual component materials. This enhancement is attributed to the formation of heterojunction between TiO₂ or ZnO and porous g-C₃N₄

In this research, we analyzed the effect of the magnetic field on the axial velocity function, as well as the stream function of non-Newtonian Wallers-B fluid in the inner duct and walls of curved peristaltic channels. This model was examined assuming along wave length and a low Reynolds number relative to a small Brinkman number (Br) using the modern and effective technique of the Mathematica program, the exact solutions of the governing partial differential  equations were found. After they were converted to ordinary differential equations. We verified the numerical results through the graphs of all the physical parameters and used the regular perturbation method to reach the numerical solutions for both the axial velocity and flow fu

This research aimed to evaluate the radon concentration for 11 different samples of consuming foodstuff collected from the markets. Alpha- CR-39 track detectors were used to analyze the radium concentration and radon exhalation rate. Al-Sayed coffee powder had the highest radon concentration of 99.7 Bq/m3 , while Al-Warda sugar had the lowest concentration of 56.5 Bq/m3 . The surface exhalation rate for the powdered milk samples varied from 2.3Bq/ m2 .h in Al-Marai sample to 3.5 Bq/m2.h in sample Anchor. While the coffee powder samples ranged from 2.4 Bq/ m2 .h in sample Al-Rifai to 3.7 Bq/m2 .h in sample Al-Sayed. The sugar samples varied from 2.11 Bq/ m2 .h in sample Al-Warda to 2.3 Bq/m2 .h in sample Al-Usra. The lifetime  cancer ris

    In this paper, we developed an  epidemic model for COVID-19 by using compartmental analysis. In our model, we divided susceptible individuals into two separate groups: one for high-risk individuals and another for those at low risk. In this work, we have proved theorems about the non-negativity and boundedness of the solutions. Afterward, we obtained a disease-free equilibrium point and an endemic equilibrium point. We calculated the basic reproduction number using the next-generation matrix method and then we expressed theorems about the local and global stability of equilibria, finally, we have gone to the sensitivity analysis and numerical analysis.

This paper presents two subclasses of analytic and bi-univalent functions associated with the Ruscheweyh derivative operator to investigate the bounds for  and where  and  are the initial Tayler-Maclaurin coefficients. The current results would generalize and improve some corresponding recent works. Additionally, in certain cases, our estimates correct some of the existing coefficient bounds.

This paper's primary goal is to present the connection between coding theory and the projective space PG(5,q) of order q, where q={2,3,4,5,7,8,9,11} It was determined whether or not the [n,k,d]-code is perfect. Where n is the length of the code, k is the code dimension, and d is the minimum distance, were calculated with error correction e according to the incidence matrix. We have found that the [n,k,d]-code in PG(5,q), q= {2,3,4,5,7,8,9,11}, is perfect if e = 1.

A field experiment was conducted in the fields of the University of Baghdad to determine the effect of clover residues mixed with the soil in which the barley crop (Arviat variety) was planted. Residues of two varieties of clover (Red clover and Egyptian clover) were added at a rate of 3 and 6grams of plant residues. Two control treatments were also implemented with 3 and 6 grams of barley straw for comparison purposes. The results showed that the clover residues significantly reduced the germination and growth of the barley crop. However, this inhibition increased significantly when plant residues were added to the Egyptian clover variety at concentrations of 3 and 6grams, achieving inhibition in the germination of barley seeds. It achi

تعد الثنائيات الضدية من المواضيع التي أثارة جهد الباحثين والعلماء في الأدب العربي قديمًا وحديثًا، وأخذت بعدًا أدبيًا ونقديًا على حدٍ سواء، لما لها من قيمة فلسفية تبان فيها براعة الشعراء وقيمة نتاجهم الأدبي، ومن هذا المنطلق عمدنا في بحثنا هذا على رصد ثنائية الشباب/ الشيب في شعر  علي بن الحسن  الباخرزي وكيف استطاع توظيف هذا الثنائية ببراعة شعرية متفردة ورصانة اسلوبية عالية، وعملنا على إيراد النصوص الأك

شهدت سوريا اولى محاولاتها لوضع أسس النظام البرلماني وتفعيل دوره في الحياة عامة في آواخر العشرينيات من القرن الفائت، وتحديداً في عهد الانتداب الفرنسي (1920-1946)، ومع ذلك لم تدخر سلطات الانتداب جهداً في التدخل في الشأن البرلماني السوري وجعله فاقداً لأي سلطة حقيقية، وما أن استقلت سوريا حتى وقعت تحت رحمة الانقلابات العسكرية (1949-1954)، والتي واجهت هي الأخرى البرلمانات المنتخبة بالحديد والنار، بحسب مصالحها دون النظر

  يعد اقتصاد الارجوارني ( البنفسج ) احد انواع الاقتصاد الذي يعد ركيزة اساسية لنمو الاقتصادي الدول كافة ، و يشير اليه الاقتصاد المدمج باثقافة كما يشير لون البنفسج للابداع ومنه جاءت التسمية ، ظهر اول مرة في فرنسا 2011 ومنها بدء الاهتمام بهذا النوع من الاقتصاد في كافة الدول منها اللمملكة العربية السعودية بعدها دولة نفطية وذات اقتصاد ناشئ تحاول الانفتاح و التوسع في كافة مجالات التنمية و التطوير الاقتصا

     يعد العنف من أولى مظاهر السلوك التي عرفتها المجتمعات البشرية. لكنه عرف ارتفاعا كبيرا خلال العقود الأخيرة، ولا يكاد يخلو مجتمع من بعض أشكاله التي عرفتها المجتمعات منذ زمن قديم، إلا أن بعض أسبابه مرتبط ببعض خصائص المجتمع الحديث. خصوصا تلك التي تبدو أنها تعبير عن الضغوطات و مشاعر الإحباط و القهر. وتعد حماية المرأة من العنف الحجر الاساس الذي يمكن البناء عليه لوقايتها من التمييز والاضطهاد والنهوض ب

يعتبر هذا العمل محاولة جادة لتقديم قراءة نقدية لواقع علم الاجتماع في الجزائر، خاصة وأنه يوظف المعطى التاريخي الذي أنتج علم اجتماع جزائري أو علم اجتماعي حمل خصوصية فكرية جزائرية مختلفة إلى حد كبير عن الممارسات الفكرية العربية معرفة ومعطا واقعيا وفقا لسياق سياسي، اجتماعي، ثقافي، وديني، حيث ميّز بداياته صراع هوياتي بين فئتين تواجدتا في نفس الفضاء الجغرافي لتأتي لحظة استقلال تزامنت مع محاولات علمية مباشرة أو

هدفت الدراسة إلى الكشف عن مدى تحقيق كتاب علم الأحياء للصف الثالث المتوسط في العراق لنتاجات التعلم من وجهة نظر مدرسي المادة؛ ولتحقيق الهدف من الدراسة تم أعداد أستبانة تكونت من (27) فقرة بتدرج ثلاثي, توزعت على أربع مجالات (المحتوى, الأهداف, الوسائل التعليمية, والتقويم). ويمثل مجتمع الدراسة عينتها المتيسرة والبالغة (80) مدرساً ومدرسة, يدرسون مادة الأحياء في ممثلية تربية الأنبار في محافظة السليمانية . وأظهرت النتائ

     In this paper, two different chaotic dynamic systems are coupled using a semiconductor laser to produce a new chaotic system. These two chaotic systems are Rossler and Chua systems. X-dynamic of Rossler system was coupled optically using optical fiber as a carrier of signal with x, y, and z-dynamics of Chua system. The results were analyzed and the behavior of Chua system was found to be changing in time series which, in turn, changed the attractor. The Chua attractor was converted from double scroll to single scroll. The results obtained from connecting two different systems in chaotic behavior showed a remarkable increase in the bandwidth of Chua system. This increase in bandwidth opens up a wide field for many

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Four hundred and seventy eight gravity base stations in Iraq were used to obtain a new local theoretical gravity equation. The obtained equation was used to construct a Bouguer anomaly map of Iraq depending on the available gravity base stations. This map was compared with the Bouguer map constructed for the same stations using the international formula (1930). Good similarity in shapes and locations of the anomaly were observed, while the   gravity anomaly values in the new map were increased by about 30 mGal. The eastern zero gravity contour line of the new obtained gravity map coincides with the western  boundary of the tectonic Mesopotamian zone, while the main negative  gravity values coincide with the Mesopotami

يتناول البحث الحالي التعرف على تأثير العلاج بالقراءة في خفض التفكير المستقطب لدى طالبات المرحلة الاعدادية ، إذ قامت الباحثة بتبني مقياس (السراي2012) للتفكير المستقطب ، وتم استخراج الخصائص السيكومترية له (صدق وثبات)، حيث تم بناء البرنامج الإرشادي على وفق نظرية بيك (1990) وتم استخراج صدق البرنامج من خلال عرضه على مجموعة من الخبراء في الإرشاد النفسي، وتم تطبيق البرنامج على المجموعة التجريبية البالغ عددها (10) طالبا

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إن الملاحم والاساطير في جميع حضارات الشرق وكل الإلهة العالم السفلي وتسلطها والتي هي اصلا الإلهة شمسيه لها دورها في حفظ التوازن بين العالمين العلوي والسفلي  فهو الذي يمثل شمس بمنتصف النهار في فصل الصيف الحار كما  تتميز بأنها إلهة الزراعة والعدل والقوة المحاربة وانها بنفس الوقت هي الإلهة التي تتحكم بالمصائر فان الإله نركال هو الإله السومري والإله العالم الأسفل فضلا كونه من ضمن الإلهة الأوبئة والإمراض و

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