Publications Scientifiques
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Item Chimie des solutions(Université M'hamed Bougara de Boumerdès : Facutlté des Hydrocarbre et Chimie, 2025) Mahdi, KarimaLe module Chimie des solutions s’inscrit dans le programme de formation des étudiants de Licence 2 en Chimie, à la Faculté des Hydrocarbures et de la Chimie. La compréhension des propriétés des solutions et des phénomènes qui s’y produisent constitue un socle fondamental pour l’ensemble des disciplines de la chimie, qu’il s’agisse de la chimie analytique, de la chimie physique, de l’électrochimie ou encore des procédés industriels. Ce cours a pour objectif de donner aux étudiants les bases théoriques et pratiques nécessaires pour maîtriser les concepts liés aux équilibres chimiques en solution, ainsi que les outils de calcul et de mesure associés.Item MOGA: Multi-Objective Genetic Algorithm to select Stacking Ensemble Learning for classification(Elsevier, 2025) Rezoug, Abdellah; Bader-el-den, MohamedStacking Ensemble Learning (SEL) has been effectively integrated with Multi-Objective Optimisation (MOO) heuristics for classification tasks across various domains, including finance, healthcare, and cybersecurity. This study aims to address the challenge of generalising SEL to a diverse set of classification cases. Thus, the Multi-Objective Genetic Algorithm (MOGA) framework is proposed, utilising a Genetic Algorithm (GA) to evolve a population of distinct SELs, each built from a varied subset of base models. The goal is to select the subset that composes the most effective SEL for a given classification task. MOGA is designed with two main objectives—maximising precision and recall—which helps to maintain independence from any specific classification case. In addition, incorporating models of varied types ensures adaptability and high performance in different situations. Comprehensive experimentation was conducted on 23 diverse datasets, where MOGA demonstrated high performance in nearly all datasets, outperforming other ensemble learning (EL) methods in 100% of the datasets in precision, 78% in recall, 69.5% in f1−score, and 78% in accuracy. A t-test analysis yielded results of p-value <0.05, indicating a statistically significant improvement in the accuracy of the MOGA over the base models. Moreover, the framework's application can be extended to regression tasks as wellItem Seismic modification factors for box girder bridges using a proposed pushover technique incorporating torsional vibration modes(Croatian Association of Civil Engineers, 2025) Aouiss, Soumia; Aouiss, Soumia; Sandjak, Khaled; Amar, LouzaiThis paper presents the results of numerical investigations on seismic modification factors (R) for algerian box girder bridges (BGBs) with both equal and unequal pier heights, using a proposed pushover technique that incorporates torsional vibration modes. In the first part, the BGB referenced in a project by the Algerian Highway National Agency is selected to evaluate the components of the R-factor in the transverse direction. Conventional pushover analysis (CPA), employing the elastic first mode, uniform, and upper-bound lateral load patterns, as well as the proposed pushover technique, is conducted. The results of CPA and the proposed pushover technique for the reference BGB are examined in terms of R-factor components, including overstrength (Ω) and global ductility (R-µ), and are compared with those obtained using the incremental dynamic analysis (IDA) technique. The findings indicate strong agreement between the proposed pushover technique and the IDA techniqueItem Midas أثر سعر الصرف على الميزان التجاري الجزائري باستخدام نماذج الانحدار(جامعة زيان عاشور -الجلفة, 2025) يحياوي, نذير; سـعيج, عبد الحـكيمتهدف هذه الدراسة إلى قياس أثر سعر الصرف بتردد عالي (شهري) على الميزان التجاري بتردد منخفض ( ربع سنوي) إضافة إلى التنبؤ برصيد الميزان التجاري خلال سنة 2024 و الربع الأول من سنة 2025. و قد توصلت الدراسة إلى وجود أثر لكل ثلاث أشهر غير متناسق لسعر الصرف على الميزان التجاري الربع سنوي حيث يبدأ سلبيا في الفترة الأولى ثم يصبح إيجابيا خلال الفترة الثانية و ثم يعود سلبيا مرة ثانية ، كما أن نتائج التنبؤ قد بينت أن رصيد الميزان التجاري الربع سنوي في الجزائر يبقى في نفس التوجه نحو التراجع بالرغم من تسجيل أرصدة موجبة.Item إسهامات الألعاب الالكترونية التفاعلية في تنمية المهارات اللغويّة عند متعلمي المراحل الأولى(2025) جوى, مغاويلقد تعرّضت المجتمعات الإنسانية في الآونة الأخيرة إلى تغيّرات جذرية وجدّ سريعة على جميع الأصعدة، حيث مسّت هذه التغيرات كلّ نظم الحياة، ومنها النظام التعليمي والتربويّ لكونه من أهم روافد الحياة البشريّة وكان من أهمّ مظاهر هذا التغيير والتطوير ظهور وسائل وآليات جديدة في العملية التعليمية التعلّميّة خاصّة في ميدان تعلّم اللغات الذي أصبحت له أهميّة كبيرة بشكل لا يمكن تجاهله خاصّة إذا تعلّق الأمر بتعلم اللغات التي لها وزن اقتصادي، وعلى رأسها اللغة الإنجليزية التي سخرت لتعليمها تقنيات واستراتيجيات جدّ متطورة سواء للكبار أو لصغار السنّ الذين حظوا باهتمام بالغ في هذا المجال، حيث استخدمت تقنيات ووسائل تعليمية جديدة تدخل ضمن تكنولوجيات التعليم المسايرة للقدرات العقلية والنفسية لهذه الفئة من المتعلمين.ومن أبرز ما أفرزه هذا التيار في ميدان تعليم اللغات ما يعرف ب (الألعاب الالكترونية التفاعلية) التي ارتأينا أن نجعلها محورا لدراستنا هذه، حيث سنحاول من خلالها الكشف عن دور التيار التكنولوجي في دفع عجلة التعليم وتطويرها، ومن هذا الباب سنركّز على محاور أساسية تدور في صلب هذا الموضوع وأهمها البحث في ماهيّة الألعاب الالكترونية التفاعلية (مفهومها، نشأتها، أهدافها) كما سنعرض في السياق نفس أبرز الأسس النفسية والعقلية التي يرتكز عليها هذا النمط التعليمي، في حين سنخصّص الجزء الثاني منها للوقوف على أهمّ أنواعها، ودور كلّ منها في تنمية مختلف المهارات اللغويّة لدى الطفلItem Some identities involving odd homogeneous multiple harmonic numbers and other related sums(2025) Kehila, WalidIn this paper, we study a certain type of polynomials that yield new identities for (odd) homogeneous multiple harmonic numbers and other related sums.Item Application of NaOH-activated peanut shells as a low-cost adsorbent for the removal of cationic dyes(Global NEST, 2025) Hamdache, Farida; Halet, Farid; Bekhti, Saida; Chergui, Abdelmalek; Yeddou, Ahmed Réda; Nadjemi, BoubekeurThe main purpose of this study is to evaluate the possibility of using a lignocellulosic residue, peanut shells after alkaline activation, as a low-cost adsorbent for the removal of methylene blue dye from aqueous solutions. Adsorption experiments were conducted by varying parameters such as the initial pH aqueous solution, contact time, temperature, and initial concentration of adsorbate. Results show that pH has no apparent effect on methylene blue adsorption; more than 95% of methylene blue was removed. The adsorption capacity of methylene blue was slightly improved when the particle size of the adsorbent and the temperature decreased. A temperature uptake from 298 K to 328 K induced a decrease in the percentage of methylene blue removal from 91.36% to 84.31%. The kinetic data obtained at different concentrations were analyzed using pseudo-first-order and pseudo-second-order kinetic models. Also, the modeling of isotherm was considered by applying Langmuir, Freundlich, and Temkin models. Kinetic and equilibrium data were best represented by pseudo-second-order and Langmuir models respectively according to determination coefficient R2 and error function values. The ultimate adsorption capacity reached approximately 100 mg/g. Thermodynamics findings revealed that the adsorption proposed is exothermic and spontaneous process. These results show that peanut shells can be a potential adsorbent for organic dyes removal from aqueous solutionsItem Cross-cultural comparison of antidiabetic medicinal plants used in Algeria and Morocco(Elsevier, 2025) Maamri, Sarra; Djeziri, Mourad; Mendil, Souhila; Terfi, LydiaDiabetes is a chronic endocrine disease of global concern. The aim of this study is to provide a comparative analysis of ethnomedical practice used for diabetes management in Algeria and Morocco, offering a scientific basis for the development of alternative therapies and innovative drug discovery. Methods: Ethnomedical information was normalised from quantitative ethnobotanical studies. Principal component analysis (PCA) was used to compare regional data, complemented by hierarchical ascending classification (HAC) to identify similarity in plant use, plant parts, and preparation methods. Results: A total of 225 species (68 families) in Algeria and 222 species (64 families) in Morocco were identified, with 95 species common to both countries (around 30%). PCA revealed interregional variabilities of 42.60% (Algeria) and 43.43% (Morocco). HAC subdivided the heterogeneous dataset into homogeneous groups based on plant usage, plant parts, and preparation modes. These groupings reflect both a shared ethnomedicinal heritage and region-specific adaptations, highlighting the balance between redundancy and divergence within the phytotherapeutic practice, which underpins its stability and therapeutic diversity. Conclusion: This study demonstrates that ethnobotanical knowledge is a dynamic and valuable resource, transcending cultural boundaries and providing a robust foundation for the discovery of novel antidiabetic formulations. The nuanced balance between common frameworks and unique phytotherapeutic specificities supports the development of complementary or synergistic therapiesItem Variation in compost pedofauna under different carbon inputs and watering treatments(Gheorghe Asachi Technical University of Iasi, 2025) Metna, Fatiha; Hammoum, Arezki; Slimani, Rachid; Kanane, MelissaThe current study was carried out at Bouzeguène’s psychoeducational center (Tizi Ouzou, Algeria), with a focus on the monitoring of compost pedofauna in relation to carbon inputs (dead leaves, paper-cardboard, and olive pomace) and watering liquids (water, lactoserum, and vegetation water). These composts were created by valorizing the organic fraction, which constituted 60 to 70% of household and similar waste. Nine tests were run to monitor the composting process. Two tons of organic waste were combined with 1.5 tons of three kinds of carbon waste. This mixture was composed of 50% nitrogenous matter and 50% carbon material. Three composters were monitored for each type of carbon material: the first was watered with water, the second with vegetation water, and the third with lactoserum. The analyzed composts contained eleven faunal groups. The average number of individuals varied between 356 ind/6250 cm3 of compost mixed with dead leaves and watered with vegetation water and 9286 ind/6250 cm3 of compost mixed with cardboard paper and watered with lactoserum. Mites dominated the nine substrates, with an average density of 99% in composts containing cardboard paper, as well as those mixed with olive pomace, and watered with lactoserum. They were followed by Diptera and Coleoptera larvae, with the remaining faunal groups under represented or absent, most likely due to inter and intraspecific competition and predation. Our findings revealed that watering with vegetation water encouraged the formation of a larger number of faunal groups.Item Characterization and Optimization of L-Asparaginase Production by Endophytic Fusarium sp3 Isolated From Malcolmia aegyptiaca of Southeast Algeria: Potential for Acrylamide Mitigation in Food Processing(John Wiley and Sons Inc, 2025) Lakhdari, Wassima; Neghmouche Nacer, Salah; Benyahia, Ibtissem; Hammi, Hamida; Bachir, Hakim; Mouhoubi, Djawahir; Lakhdari, Yasmine; Guemmou, Ihsane; Dehliz, Abderrahmene; Sawicka, BarbaraThis study aims to isolate and optimize the production of L-asparaginase from fungal strains derived from Algerian Saharan plants, and evaluate the reduction of acrylamide formation in food products. L-asparaginase has frequently been used to treat childhood acute lymphoblastic leukemia. It catalyzes the hydrolysis of asparagine and glutamine into aspartic acid and ammonia. It is also used in the food industry to minimize acrylamide formation during high-temperature frying of starchy food items. In this study, L-asparaginase was identified in various microbial, animal, and plant species. Using Czapek-Dox medium, different fungal species were first isolated from Saharan plants of southeast Algeria (including Zygophyllum cornutum Coss., Malcolmia aegyptiaca Spreng., Phoenix dactylifera L., and Cyperus rotundus L.) and tested for their ability to produce extracellular L-asparaginase. Among 13 isolates, nine were positive in the preliminary test. The strain Fusarium sp.₃, isolated from M. aegyptiaca leaves, had the highest enzyme index (1.92 ± 0.35) with maximum enzyme production (63.68 units per milliliter). Critical factors such as temperature (30°C–50°C), pH (5.0–8.0), and substrate concentration (1–10 g/L) were optimized under liquid-state fermentation to maximize enzyme production. Utilizing Minitab software, additional statistical methods were employed for the optimization process, including the Plackett–Burman design and response surface methodology. The Plackett–Burman design screened seven variables: temperature, pH, incubation time, substrate concentration, glucose concentration, nitrogen source, and agitation speed. The design identified asparagine concentration, incubation time, and pH as the most significant factors for asparaginase production. Response surface methodology was then used to optimize these factors, producing maximum asparaginase in a 50-mL medium. Under optimized conditions, the application of L-asparaginase to potato slices prior to frying resulted in a 68% reduction in acrylamide content (from 435.6 ± 12.4 μg/kg to 139.3 ± 8.7 μg/kg), demonstrating the enzyme's strong potential for improving food safety