Digital Repository of the University of Fallujah
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Digital Repository of the University of Fallujah
Welcome to the Digital Repository of the University of Fallujah
The Digital Repository of the University of Fallujah is a centralized platform designed to preserve and showcase the academic, research, and scholarly contributions of our university community. This repository serves as a vital resource for faculty, students, and researchers, offering access to a wide range of digital content including:
- Research papers, theses, and dissertations
- Academic publications and conference proceedings
- Course materials and lecture notes
- Multimedia content and archival materials
By providing open access to these valuable resources, the repository aims to support knowledge sharing, foster academic collaboration, and enhance the visibility of the University of Fallujah’s scholarly work on a global scale. Explore, learn, and contribute to our growing collection!
News
University of Fallujah News
Latest News
University Hosts Annual Research Conference
March 2025
The University of Fallujah recently hosted its annual research conference, bringing together scholars, students, and industry experts to discuss the latest developments in science and technology.
New Digital Repository Launched
November 15, 2024
We are excited to announce the launch of the Digital Repository, providing open access to the university's academic and research materials for global audiences.
New University of Fallujah System Released
November 15, 2024
The University of Fallujah has launched a new system to enhance administrative processes and improve student services. This system aims to streamline academic records, facilitate communication, and provide a user-friendly platform for students, faculty, and staff.
- You can see more and keep up to date https://www.uofallujah.edu.iq/news
- You can see more and keep up to date https://www.uofallujah.edu.iq/adds
- You can see more about Conferences https://conferences.uofallujah.edu.iq/
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Item Up-to-Date Review on Flat-Plate Solar Hybrid Photovoltaic Thermal Systems: Absorber Designs and Fabrication Materials(John Wiley & Sons, 2025-06) Moustafa Al-Damook; Yassine El Alami; Elhadi Baghaz; Rehena Nasrin; Rachid Bendaoud; Tarik Bouragba; MustaphaMelhaoui; Mohammadi BenhmidaPhotovoltaic (PV) technology is generally perceived as well-developed but suffers a drop in performance at high temperatures. Faced with this problem, researchers are turning to PV thermal (PVT) systems, which integrate electricity production and thermal energy. Flat-plate PVT systems are the most widely adopted among the various configurations. This article is distinguished by an in-depth analysis of flat-plate PVT systems, drawing on a detailed analysis of recent research. It summarizes the numerous studies on the different layers of PVT systems, providing an overview of advances in this field. The materials used for absorbers and tubes are explored, providing information on their properties and applications and on the research being carried out to optimize their efficiency. The analysis also focuses on heat exchanger, tube, and channel configurations, highlighting innovations to improve their performance. Methods for integrating absorbers and tubes with PV panels, the most efficient types of PV cells, and working fluids for optimizing heat transfer and thermal performance are also discussed. Finally, an overview of software tools for simulating PVT systems and a summary of research on each software tool are provided to help researchers select the most appropriate tools for their modeling. Recommendations for further improvements to the viability of these systems are also providedItem Computational neutron emission spectrometry and radiation assessment in VVER-1200 reactor nuclear fuel(Elsevier, 2025) Ahmed H. Ali; Sergey V. Bedenko; Gennady N. Vlaskin; Sergey D. Polozkov; Alexey A. Orlov; Hector Rene Vega-CarrilloTo ensure long-term and trouble-free operation, the reactor fuel is modified by introducing various homogeneous and heterogeneous additives. This modified fuels exhibit satisfactory performances under irradiation at elevated temperatures and burnup levels. However, the challenges related to radiation safety during the handling of fresh and spent nuclear fuel remain unresolved. In this study, neutron emission spectra and effective doses for VVER- 1200 reactor fuel containing a heterogenous distribution of natGd2O3 and Am2O3, microspheres were calculated. Unlike in the case of homogenous variants, this design did not reduce the thermal conductivity of the fuel and positively affected the core neutronics and thermophysics. Comparing the radiation characteristics of fresh FAs revealed a considerable increase in the neutron (more than 3.7•102 times at a distance of 10 cm from the FA) and photonic (about 104 times) components of Am–containing fuel compared to U and U–Gd fuels. The yield and effective dose of neutrons emitted from spent Am-containing fuel is two times higher than that of uranium–based fuels. When calculating the dose, it is important to consider the energy spectrum of (α, n) neutrons in Am2O2 microcapsules. The findings of this study provide insights into the development of procedures and regulations for manufacturing and post-irradiation handling of new fuel in reactors.Item Mechanical properties of novel green high-strength fly ash concrete incorporating hemp fibers(Elsevier, 2025) Aktham H. Alani; Hussein Ghanim Hasan; Megat Azmi Megat Johari; T.A. Majid; N. Muhamad BunnoriCement production rose in the late 20th century. In response to environmental concerns, green concrete research and development have risen. The use of fly ash as a cement substitute in green concrete remains limited, despite global studies. This study aimed to investigate the feasibility and advantages of utilizing hemp fiber on the mechanical properties of high-strength green concrete (HSGC) containing different volumes of fly ash (FA). Hemp fibers were added at 0.5 % and 1 % of the total mixture volume, in combination with varying levels of FA (0, 10, 17.5, and 35 %) as a partial replacement material for the total volume of Ordinary Portland Cement (OPC) binder in the HSGC. Slump flow diameter and T50 slump flow were performed to assess the rheological properties of fresh concrete mixtures. The results show that even with a 35 % FA content, the flexural properties and ductility behavior of HSGC were significantly improved by the combined use of FA and hemp fiber at 28 days. The superior increase in compressive strength, splitting tensile strength, flexural strength, flexural toughness, and ductility was achieved with hemp-fiberized HSGC containing 17.5 % FA and 1 % hemp fiber by 22.3 %, 49.81 %, 14 %, 50.8 %, and 28 %, respectively, relative to the control mix. Thus, hemp fiber could extend fly ash use in HSGC production, reducing cement demand and energy consumption while improving concrete sustainability.Item A Sustainable Multi-Criteria Optimization Approach for the Energy Retrofit of Collective Housing in Algeria Using the ELECTRE III Tool(Springer Nature, 2025-05-08) Nahla Hilal; Nesrine Chabane; Abderahemane Mejedoub Mokhtari; Malika Kacemi; Zouaoui R. Harrat; Naida Ademovi´; Marijana Hadzima-NyarkoAbstract: This study proposes a sustainable multi-criteria optimization framework for the energy retrofit of collective residential buildings in Algeria, particularly those constructed between the 1970s and 1980s. Through on-site surveys, energy consumption analysis, and seasonal temperature measurements, the high energy demand of these buildings was confirmed. Using EnergyPlus simulations based on Meteoblue weather data, 16 retrofit strategies were assessed—incorporating various insulating materials applied internally or externally (via rendering or cladding). The ELECTRE III decision-making tool was employed, supported by the Simos Revised Framework (SRF) for weighting environmental, economic, and social criteria. Results demonstrate that all strategies significantly reduce energy demand—by up to 72.5%, with reductions reaching 94.4% in winter and 43.5% in summer, depending on insulation type and placement. Improvements in indoor thermal comfort were also observed, with exterior insulation beneath cladding offering the best performance during winter, while exterior rendering also proved effective in the summer. The ELECTRE III analysis identified rock wool and polyurethane with fiber cement cladding as optimal insulation solutions. The proposed approach supports national energy policies and aligns with the Sustainable Development Goals (SDGs), offering a replicable model for large-scale building retrofits in similar climatic and architectural contexts.Item العالم الالكتروني وأثره في نشر الفكر المتطرف "دراسة قانونية تحليلية مقارنة"(2025-06-01) م.م مصطفى محمد منصور العبدليان الفكر المتطرف يعد من اخطر انواع الارهاب، وكما انه يمثل ظاهرة عالمية مرتبطة بفكر الانسان اياً كان توجهه ومعتقده او مذهبه فهو يقوم بغلق فكره وقمع حريته الفكرية. ساهم العالم الالكتروني بشكل كبير في انتشار الفكر المتطرف من خلال استخدام المواقع الالكترونية المختلفة خاصة التطرف الذي اتخذ من الاسلام غطاء له كالعصابات الداعشية والقاعدة ليبثوا افكارهم الظلامية عبر الشبكة العنكبوتية لتصل الى شرائح المجتمع بسرعة كبيرة. ان كان من السهل مكافحة الفكر المتطرف في الواقع لأنه يكون مكشوف او يمكن التعرف عليه من خطاباته وتحركاته، عكس ما عليه الحال في الواقع الالكتروني الذي يحتاج الى تظافر الجهود لكبح وجوده والتضييق عليه لأنه يستخدم مواقع الكترونية كثيرة وغرف سرية مغلقة، بالتالي يقع على عاتق الحكومة وضع القوانين الرادعة وتفعيل الرقابة والتوعية المجتمعية والاجهزة الامنية للتصدي لهذا الخطر الكبير والحد من وجوده. وعليه فإن سبب اختياري لهذا الموضوع ما هو الا من باب الحرص على المجتمع الدولي بشكل عام والمجتمع العراقي على وجه الخصوص الذي عانى الويلات من خطورة الفكر المتطرف. من الصعب انهاء وجود هذا الفكر بالكامل في العالم الالكتروني الواسع ولكن لابد من العمل على تحجيم خطره باتخاذ خطوات جدية وحلول ناجعة. ان ابرز ما توصلنا اليه في هذا البحث هو تعريف الفكر المتطرف واهم الدوافع التي تسبب في انتشاره ووضحنا المعالجات القانونية الممكنة على المستوى الدولي والوطني.Item New molybdenum(VI) complexes with bidetantete (N,N), (N, S), and (S, S) ligands spectral characterization and theoretical calculations(2025-05-25) Othman I. Alajrawy; Alaa Mh. EeSee[MoO2(acac)(ATP)], [MoO2(4CPD)(ATP)], [MoO2(ATP)2], and [MoO2(ATP)(DTO)] are four new MO(VI) complexes have been synthesized, where (acac) is acetylacetone, (ATP) is 2-aminothiophenol, (4CPD) is 4-chloro-ophenylenediamine, and (DTO) is dithiooxamide. The complexes were characterized using a variety of spectral techniques, such as mass spectroscopy, 1 H NMR, FT-IR, UV–Vis., and theoretical calculations. The FT-IR spectra showed that the oxygen, nitrogen, and sulfur atoms coordinated the ligands with the MO(VI) ion. The mass spectrum of each complex describes its mononuclear structure. The complexes are diamagnetic and have an electrical configuration of d0 . The complexes’ lowest unoccupied molecular orbitals ranged in energy from − 0.095 to − 0.260 a.u., while their highest occupied molecular orbitals ranged from − 0.347 to − 0.373 a.u., according to the computational results. The complexes were found to be softer and more soluble than the free ligands. The prepared complexes feature distinct coordination environments around the MO(VI) ion, specifically: (2O, N, S), (3N, S), (2N, 2S), and (N, 3S). This variation in the percentage of sulfur atoms surrounding the Mo(VI) ion was intentionally designed based on Pearson’s Hard and Soft Acids and Bases theory. The comparatively easier electronic transitions observed in the complexes, relative to the free ligands, suggest their potential for future application in photocell research. For each complex, a distorted octahedral geometry was proposed based on the calculated bond lengths and bond angles.Item Cytotoxic evaluations, spectral characterizations and DFT theoretical calculations of new dioxidovanadium(V) complexes(Mongolian Journal of Chemistry, 2025-05-26) Othman I. Alajrawy; Huda A. Hadi; Roaa S. Awad Al-Luhaib; Sarah S. SabarTwo dioxidovanadium(V) complexes have been prepared with dinitrogen atoms donor (ophenylenediamine (OPD) and dithiooxamide (DTO)) ligands. The cytotoxicity studies of the prepared complexes against the L20B cell line displays that they have moderate activity 15 against the L20B cell line. Then, the complexes were characterized by different spectral techniques such as FT-IR, UV-Vis., mass, 1H-NMR spectroscopy, magnetic susceptibility, and molar conductivity. Finally, the spectral data were compared with the data obtained by 18 the DFT theoretical calculations. The obtained spectroscopic data confirmed that the two ligands are coordinated from the two amine groups and in cis-conformation with the two oxygen atoms. The experimental and theoretical calculations show that the two complexes 21 are mononuclear with proposed distorted octahedral structures. The complexes are very stable, the electronic energies are (-773.10 and -907.56 a.u.), the HOMO orbitals energies are (-0.386 and -0.504 a.u.), and the LUMO orbitals energies are (-0.213 and -0.421 a.u.) 24 for the complexes; respectively. The bond angles around the vanadium(V) atoms are in the range (69.44-91.36 A°), and the dihedral angles are in the range (111.22-161.94°). Calculations explained that the complexes are polarized (3.39-5.28) more than free ligands 27 (0.002-3.00). The electronic transition in the complex (2) (0.083) is less than for the complex (1) (0.173). After that, the findings showed that the two complexes have the feature of solubility in water rather than other anticancer compounds that lack such a property; even 30 though using different metal complexes like Platine complexes, etc. Thus, this feature will help researchers use such complexes in future studiesItem NEW OXOMOLYBDENUM(IV) COMPLEXES WITH ADDUCTED MONODENTATE LIGANDS, SPECTROSCOPIC CHARACTERIZATION, DFT CALCULATIONS, BIOLOGICAL AND ANTIOXIDANT ACTIVITY(Bull. Chem. Soc. Ethiop, 2024-06-24) Noor F. Abdalah; Othman I. Alajrawy; Sattar R. MajeedOxomolybdenum(IV) complexes with chemical formula [MoO(ATP)(DIAB)(AMP)] (C1), [MoO(ATP)(DIAB)(Atri)] (C2), [MoO(ATP)(HNQ)(AMP)] (C3) and [MoO(ATP)(HNQ)(Atri)] (C4) have been synthesized and studied using different spectral methods, including atomic absorption, FTIR, UV-Vis., mass spectroscopy, magnetic sensitivity, electrical conductivity, and C.H.N.S. analysis. The ligands were 2- aminothiophenol (ATP), 3,4-diaminobenzoic acid (DIAB), 2-hydroxy-1,4-naphthoquinone (HNQ), 6-amino-2- methylpyridin (AMP), and 3-amino-1,2,4-triazole (Atri). The FTIR spectra confirm (DIAB, AMP, and Atri) were coordinated by amine nitrogen, whereas the (HNQ) ligand was by oxygen, and the (ATP) by nitrogen and sulfur atoms. The υ(S-H) band vanished in comparison to the (ATP) ligand, this demonstrates how Mo(IV) and the sulfur atom. The (HNQ) ligand's oxygen atoms work in tandem with the Mo(IV). Mo(IV) complexes with d2 are paramagnetic. All complexes have been suggested to have an octahedral structure based on computed and experimental evidences. Two Gram-positive and two Gram-negative bacteria were used to test the (ATP) ligand and the produced complexes' activity. The complexes showed an expanded zone of inhibition, indicating that they were more lipophilic than the free (ATP) ligand. Finally, the antioxidant activity of the complexes was tested, and the result showed the following order: Gallic acid ˃ C3 ˃ C2 ˃ C4 ˃ C1 in 60 min.Item CLIMATE CHANGE IMPACTS ON TRI-TROPHIC PREDATOR{PREY MODEL OF THE INTERACTIONS BETWEEN WOLVES, UNGULATES, AND PLANTS(John Wiley & Sons, 2025) ASHRAF ADNAN THIRTHAR; PRABIR PANJA; ZAHRAA ALBATOOL MAHDI; BAPIN MONDAL; ASMA AL-JASER; THABET ABDELJAWAD; MANAR A. ALQUDAHAbstract The model considers the interactions between wolves, ungulates, and plants in a three-level trophic system. Climate change is assumed to have an impact on plant growth, in uencing the logistical aspects of plant development. In the absence of ungulate species and climate change, it is suggested that plants could grow logistically. Ungulates are assumed to consume plants and this consumption is in uenced by climate change. Wolves are presumed to consume ungulates, and the rate of this consumption is believed to be in uenced by global climate change. The study discusses the positivity, boundedness, and dissipativeness of the model, likely referring to the system's behavior and stability. The stability of equilibrium points in the model is studied, both locally and globally. It is discovered that the populations of ungulates and wolves may go extinct due to the increase in global climate change. The presence of global warming or climate change and increased plant consumption by ungulates could lead to instability of the ecological system. Results from numerical simulations are presented, providing a practical illustration of the model's behavior under di erent conditions.Item Stability and bifurcation analysis in a novel discrete prey-predator system incorporating moonlight, water availability, and vigilance effects(Springer Nature, 2025-05-27) Ashraf Adnan Thirthar; Karima Mokni; Mohamed Ch-Chaoui; Shireen Jawad; Muhammad Aqib AbbasiAbstract This study explores the dynamics of a discrete-time predator–prey model derived from a continuous framework, integrating factors such as prey vigilance, refuge availability, water resources, and moonlight. The model captures realistic ecological scenarios where vigilance reduces predation success but also incurs energetic and temporal costs, leading to diminished prey population growth. Additionally, mammalian prey consumption is influenced by the availability of refuge, water resources, and moonlight intensity, reflecting key environmental and behavioral factors. The analysis examines the boundedness of solutions, the stability and existence of fixed points, and the emergence of bifurcations. The study emphasizes codimensionone bifurcations, including Neimark–Sacker bifurcations, and codimension-two bifurcations, such as 1:2 resonance. Detailed numerical simulations are employed to investigate the complex dynamics arising from these bifurcations, providing significant insights into the model’s behavior. The findings contribute to a deeper understanding of how ecological and environmental factors interact in predator–prey systems and their implications for ecosystem stability.