انغام غانم هادي, جليل كريم أحمد, حسين عبد محمد

كلية العلوم-جامعة بابل · العراق

In this study, anthocyanins are extracted and purified, then a series of complexes are prepared from reaction with the metal ions Pb(II), Cd(II), and Hg(II) after fixing the optimum conditions of volume, concentration, temperature, and pH. The UV-Vis spectra of these ions with the pigment solution have been studied. The formula of the complexes is deduced according to Job’s method, which is obtained from the spectrophotometric studies of the complex solution. The ratios of ligand:metal obtained are 2:1 for all complexes under study. The stability of the complexes has also been studied at different temperatures and times. Complexes of these ions with the pigment solution are prepared at pH 9.2; the ring of the heterocyclic is opened. The solid complexes are indicated by UV-Vis spectra, which showed a red shift when compared with pigment solution spectra. Infrared spectra are also studied and showed the appearance and disappearance of some peaks, which refers to coordination between the ligand and the metal ion. The molar conductivity showed the absence of ionic property. The determination of magnetic susceptibility for all complexes showed that they have diamagnetic properties. The proposed geometrical structures of the complexes are concluded as tetrahedral.

أسماء حربي حسن

الجامعة التكنولوجية · العراق

Mouad Hamdi , عبدالغني بوبكري, عبدالوهاب بن صديق, محمد أيوب خلفاوي

كلية العلوم التطبيقية-جامعة قاصدى مرباح ورقلة · الجزائر

This work presents an experimental investigation into the performance of different solar dryer configurations designed for agricultural products, with a particular focus on carrots, peppers, and eggplant. The study evaluates and compares solar dryers enhanced with Phase Change Materials (PCM) for thermal storage, dryers equipped with heat recovery systems using PVC pipes, and systems featuring heat exchangers. Each prototype's drying performance was assessed in terms of temperature distribution, drying curves, and final product moisture content. The findings highlight that while PCM systems effectively stabilize temperatures during low solar radiation hours, heat recovery and heat exchanger systems significantly increase internal air temperatures and accelerate drying rates, particularly during the falling-rate period. Mathematical modeling using ten thinlayer drying models was applied to describe the drying kinetics, with the Midilli-Kucuk model consistently providing the best fit. The results underscore the importance of integrating heat storage and recovery technologies into solar dryers to enhance drying efficiency and product quality, especially in regions with high solar irradiation like Ghardaïa.

Meryam Zeriati, Mebarki Hassina, Ouadah Hamza

كلية العلوم الإنسانية والاجتماعية-جامعة عبد الرحمان ميرة - بجاية · الجزائر

Etude s'est focalisé sur l'opinion des ouvriers de CEVITAL vis-à-vis leurs conditions de travail et leurs états de santé et sécurité

Abdouche Amina, Dobbi Abdelmadjid, Gaoui Lilia

كلية المحروقات والطاقات المتجددة وعلوم الارض والكون-جامعة قاصدى مرباح ورقلة · الجزائر

The cleaning of the well is one of the principal functions in the drilling of an oil well, since a bad cleaning can generate various problems the such high torque, frictions which make increase the pressurelosses and even thewedging of the trimming of drilling., Thus it is essential to be interested in correct cleaning of the well. The objective of this work is tostudy the influenceof the parameters of hydraulic and rheologi caldrilling in order to obtain a comprehension of thephenomena governing the behavior of Cuttings in the wells of drilling on the one hand, and on the other hand to facilitate the choice ofthe critical parameters allowing the evacuation ofthese cuttings out of well to avoid the problems generating by drove cleaning in the phase 16 . For simulation one worked out a program carried out by Excel which calculates all rheological andhydraulic parameters of the mud of drilling, it alsoallows to see the effectiveness of cleaning andthe distribution of the pressure losses in thevarious sections of the well, and our application ison well CEN#3 Phase 16. Finally, it was noted that it is preferable to spend a few hours to be cleaned effectively, to spend of the days to try to solve a problem

A Boudah , Gouta Demmak Rym

كلية العلوم الطبيعية وعلوم الحياة-جامعة الاخوة منتورى - قسنطينة 1 · الجزائر

رغداء لحدو, رفاه منافيخي

كلية الصيدلة-جامعة حلب · سوريا

إقبال نعيم كوركيس

الجامعة التكنولوجية · العراق

Fatima Boumghar, Rachid Namane, Serge Miguet

كلية المعلوماتية والالكترونيات-جامعة العلوم والتكنولوجيا هواري بومدين - الجزائر · الجزائر

Visualizing isosurfaces is an important mean to explore data and discoverknowledge in volumetric datasets. The Marching Cubes (MC) algorithm isthe original, simple and most popular isosurface extraction technique. In thistechnique, the resulting isosurface consists of the combination ofall polygonsproduced around the discrete point samples of the input dataset.For severaldecades, the improvement of the accuracy and the topological correctness ofthe polygonized isosurface was the goal of many research works.On 3D regular grids of data, most authors consider that the “ideal”isosurfaceis the one obtained by a trilinear interpolation of sample data located atthe eight vertices of every 3D grid cell - voxel. They use this argument topropose alternatives to the original MC algorithm which allows producingpolygonized surface that is homeomorphic to the ideal one, by mainlyintroducing supplementary points to the original mesh.If a smooth surface is to be represented by a triangle mesh, the numberof triangles is inversely proportional to the approximation error. Agoodapproximation can be achieved with a fine mesh to adapt surface curvatureand shape complexity. When the number of triangles is high, rendering suchdatasets leads to triangles whose projected area is less than one pixel; wastingtime in triangle based scan-line rendering. Another alternative to solve theproblem is to use points as rendering primitives instead of triangles.Point-based isosurfacing techniques have been developed for theaim ofvoxelizing the assumed ideal surface to achieve a better approximation of thedesired isosurface. The main advantage of point-based isosurfacing techniquesis their structural simplicity. This is due to the fact that no connectivity, ortopological information is required which makes the geometric processing ofhighly complex 3D-models more flexible.The Dividing Cubes algorithm (DC) is among the proposed point-basedalternatives to solving problems related to MC-like methods by which weare interested. However, it has some drawbacks related mainly to its timecomplexity in the extraction process and the excessive number of points usedin surface representation. In this thesis, we are interested by this familyof isosurface point-based representation approaches, in which we propose amuch more efficient and fast voxelization algorithm.Since in DC technique, the resulting voxelized isosurface is based a piece-wise trilinear interpolation, which makes itG0continuous across the cellBoundaries. The first part of our work consists in the study of using ahigher order interpolation schemes - tricubic interpolation - in the DCbasedisosurface extraction in order to produceG1surfaces; the so called modifiedDC algorithm. Both techniques have been implemented and tested for comparison purposes in terms of both surface quality and computationaltime.The main part of this thesis is devoted to propose a new method for afastincremental voxelization of isosurfaces obtained by the trilinear interpolationof 3D data. Our objective here consists in the fast generation of subvoxelizedisosurfaces extracted by a point-based technique similar to DC algorithm.Our technique involves neither an exhaustive scan search processnor agraph-based search approach when generating isosurface points. Insteadan optimized incremental approach is adopted here for a rapid isosurfaceextraction. With a sufficient sampling subdivision criteria around criticalpoints, the extracted isosurface is both correct and topologicallyconsis-tent with respect to the piecewise trilinear interpolant. Furthermore, thevoxelization scheme used in our method ensures obtaining thin - one voxelwidth - isosurfaces as compared to the one given by the DC algorithm. Theresultant subvoxelized isosurfaces are efficiently tested against all possibleconfigurations of the trilinear interpolant and real-world datasets

جمال بشير عبد الهادي يحي, زكي الدين عثمان الفكي محمد

كلية الدراسات العليا-جامعة الإمام المهدي · السودان

تهدف هذه الدراسه والتي بعنوان القصاص في الشريعة الاسلامية والقانون الوضعي (دراسة مقارنة) إلي التعرف علي القصاص في الشريعة الأسلامية مقارنتاً بالقانون الوضعي، واثر ذلك في الحد من وقوع جرائم القصاص، وتمثلت مشكلة البحث في الوصول لدوافع ارتكاب جرائم القصاص والحكمة من تشريعه وتباين تطبيق عقوبة القصاص حسب حال الجاني إن كان صغيراً أم كبيراً أو مجنوناً أو مريض أو حامل أو عبداً أو ذمياً ،عدم تطور القانون مع تطور السلوك الإجرامي، وقد أتبعت المنهج التحليلي علي هدي المنهج التاريخي.وتوصلت الي عدد من النتائج أهمها اذا كانت العقوبة لا يمكن ان تنفذ الا بزيادة او باحتمال الزيادة احتمالا قريبا فانه لا يوقع القصاص،لان العقوبة لا يتحقق الحاكم من مماثلتها للجريمة ولايباح منها الا بقدر الجناية، كما أن الاشتباه في زيادة القدر الواجب من القصاص عند الاستيفاء يفسر لمصلحة الجاني لاصل العصمة التي هي امر مؤكد فلا يباح مع الاشتباه في الزيادة.كما توصلت الدراسه الي عدد من التوصيات أهمها: تطبيق عقوبة القصاص بضوابطها الشرعية لأنها كفيلة بالحد من تفشي جريمة القتل والجرائم الأخرى، وفي نفس الوقت استقرار المجتمعات، ونشر الأمان بين الناس مع تهذيب وإصلاح الجاني في حالة العفو أو الصلح.. كما أن تطبيق عقوبة القصاص حياة لملايين البشر، وختاماً ذيل البحث بفهرس المصادر والمراجع .