المجلد الرابع عشر- العدد الاول - يونيو 2024

Influence of E-Glass Fiber on the Properties of Fresh &Hardened Concrete

Mon, 01 Jan 2024 00:00:00 GMT

Influence of E-Glass Fiber on the Properties of Fresh &Hardened Concrete Ahmed. M. Alsadaai; Ghusen M. AL Kafri; Aziza. Al jarari Concrete is a composite material consist of aggregate (gravel and sand), cement and water. This material reigns supreme in the construction industry, captivating builders with its exceptional compressive strength, unwavering durability, and boundless versatility. Plain concrete has a very low tensile strength, limited ductility and little resistance to cracking. To enhance mechanical properties of concrete (compressive strength, tensile strength usually added fibers to it. Researchers are cheering the addition of fibers to various materials. This research discusses the effects of E- glass fibers on the mechanical properties and workability of concrete. Experimental programmer consists of conducting compressive strength test, flexural strength test and split tensile strength and workability of concrete containing varying proportions of E-glass fiber. In our research we used the E-Glass fibers at different percentages as 0%.0.2%,0.4%.0.6% by the volume of fracture on C30 grade of mix proportion (1: 3: 1.8) with water cement ratio 0.56. From the results of experiments turns out that the Adding 0.2% glass fibers to concrete significantly improves its flexural strength (11.7%) and slightly boosts compressive (4.4%) and splitting tensile (6.16%) strength at 28 days. GFRC specimens also exhibit more resilient behavior under testing compared to plain concrete. However, workability declines with increasing fiber content

Effect of Poultry Manure (litter) and Seagrass (Posidonia oceanic) Extract on Enhancing Pepper Plant Resistance to Cucumber Mosaic Virus (CMV)

Mon, 01 Jan 2024 00:00:00 GMT

Effect of Poultry Manure (litter) and Seagrass (Posidonia oceanic) Extract on Enhancing Pepper Plant Resistance to Cucumber Mosaic Virus (CMV) Mohamed Ali A Salim; Hassan A Mohmmed Hassan This study was conducted in the area of 27 East Sirte in 2022 to investigate the impact of different levels of poultry manure (poultry litter) extract (50 ml, 100 ml, 150 ml per irrigation process) and levels of Posidonia oceanic seagrass extract (50 ml, 100 ml, 150 ml) on enhancing resistance of pepper plants grown in pots to Cucumber Mosaic Virus (CMV). The results indicated a decrease in the severity of infection compared to the control. The infection rate in the control sample was 55%, while the lowest infection rate was observed with the treatment of 150 ml of poultry manure, showing a 13% infection rate. Seagrass extract treatments also demonstrated a significant impact on infection severity, with a decrease of 47%, 40%, and 36% for 50 ml, 100 ml, and 150 ml of seagrass extract, respectively. Overall, the addition of organic fertilizer to the soil led to improved resistance against CMV infection and stimulated growth in pepper plants. Application of organic fertilizer in agricultural soil is considered a practical method to mitigate the impact of climate change, improve plant productivity, and enhance disease tolerance for sustainable agriculture

Sealer adaptation in the dentinal tubules: a scanning electron microscopic study

Mon, 01 Jan 2024 00:00:00 GMT

Sealer adaptation in the dentinal tubules: a scanning electron microscopic study Showg A. Salem Aim: The purpose of this study was to evaluate the adaptability of 3 different endodontic sealers to the root canal wall using a scanning electron microscope (SEM). Methods: Thirty extracted human single-rooted teeth were randomly classified into three equal main groups according to the type of sealer used: Tech Biosealer Endo, Flavonoid-based experimental sealer and MTA-Fillapex sealer. All root canals in this study were obturated with gutta-percha using lateral condensation technique after preparing mix from each tested sealer. The samples were examined under SEM to determine two main aspects: Gap and Interface. Results: The result indicated that Tech Biosealer Endo had shown the best adaptation to canal walls at all root levels, followed by the MTA-Fillapex, and the most diminutive adaptation was seen in the Flavonoid-based experimental sealer. SEM showed the best adaptation for all tested sealers to root dentin was at the middle root level, followed by the apical root level, while the coronal root level showed the worst adaptation (p<.05). Conclusions: SEM analysis indicated that among the tested sealers, Tech Biosealer Endo achieved the best overall adaptability to root dentin, particularly at the middle root level. This suggests that sealer composition significantly influences the quality of the interface between the sealer and root canal walls, impacting the potential for successful endodontic treatment outcomes.

Comparative Analysis of Picocell and Femtocell Performance Utilizing Various Propagation Models

Mon, 01 Jan 2024 00:00:00 GMT

Comparative Analysis of Picocell and Femtocell Performance Utilizing Various Propagation Models Mohamed Abughalia; Algaddafi Alpotte; Mohammad Elmahdi This study provides an in-depth comparison of picocells and femtocells within 4G networks, employing various propagation models. Using both empirical and deterministic methodologies, the investigation thoroughly explores signal propagation, coverage, and capacity aspects of small cell deployments across different environmental conditions. Leveraging insights from multiple propagation models, the research elucidates the effectiveness of picocells and femtocells in urban, suburban, and rural settings. Crucially, these findings, obtained through a user-friendly GUI developed with MATLAB, offer valuable guidance for refining small cell network design and deployment strategies in 4G environments. This contributes significantly to ongoing discussions on optimizing small cell networks, underlining the importance of tailored approaches for efficient deployment and operation across diverse environmental landscapes