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Enhancing Gas Cyclone Performance with Exit Diffusers
Get PDFThis study evaluates seven cyclone designs to enhance pressure drop and collection efficiency (CE), using the conventional cyclone as a baseline. While the conventional design is efficient in particle collection, it experiences significant energy losses due to high values of pressure drops. This study introduces exit diffusers with various configurations—A, B, C, D, E, and F—to improve cyclone performance. Computational Fluid Dynamics (CFD) simulations were used to analyse the pressure drop, tangential velocity, and static pressure at different levels of each cyclone. The findings reveal that cyclone D achieves a 41.1% reduction in pressure drop but at the cost of a 21.3% decrease in the CE. Cyclone C presents a balanced option, with a 28.0% reduction in pressure drop and only a 7.9% decrease in CE, making it suitable for industrial applications. Cyclone F shows a 39.6% improvement in pressure drop, though it results in a 19.7% reduction in CE
The Role of Quality-of-Life Indicators in Developing Ur-ban Communities: An Applied Study of the Case of Egyp-tian Rural Urbanization
Get PDFQuality of life is a comprehensive concept that assesses the well-being of individuals and communities based on multiple criteria including health, education, economy, environment, and security. Its definitions vary, but they generally refer to a balance between physical, psychological, and social aspects. The most important criteria for its assessment include public health, income level, quality of education, environmental sustainability, and social security.
Quality of life indicators are used in the development of urban communities to ensure the provision of health and education services, advanced infrastructure, and green spaces. Some developing countries such as Brazil, India, and Kenya also rely on these indicators to improve services in poor areas, which enhances the well-being of the population.
In Egypt, rural communities face challenges in areas such as health, education, and infrastructure. Therefore, analysis of quality of life indicators in these areas is used to identify gaps and improve living conditions, through projects that focus on improving water, education, and transportation services, and increasing economic opportunities.
The research emphasizes the importance of strategic planning for the development of communities, especially rural ones, to improve quality of life and reduce the gap between rural and urban areas, as the research defines quality of life, its importance, and its standards in urban and rural communities, in addition to analyzing global and local experiences in improving quality of life indicators
The influence of buffered and conventional anesthetic solutions on the pain level in children during an inferior alveolar nerve block injection: randomized Clinical Trial
Get PDFObjectives: The purpose of this study was to assess pulse rate as a physiological pain assessment during inferior alveolar nerve block injection using buffered anesthetic solution (lidocaine 2% epinephrine 1/80,000 with sodium bicarbonate 8.4%) and conventional anesthetic solution (lidocaine 2% epinephrine 1/80,000) to treat bilateral mandibular primary molars.
Materials and Methods: Forty patients were included in the study sample to perform 80 inferior alveolar nerve block injections with split-mouth technique in patients aged 6-10 years with bilaterally infected mandibular primary molars. A fingertip oximeter was used to measure the pulse rate before and during anesthesia.
Results: The pulse difference before and during anaesthesia was evaluated using the student’s t-test for independent samples for both the buffered anaesthetic solution and the standard anesthetic solution groups. At P = 0.05, there was a statistically significant difference in favor of the buffered anesthetic solution.
Conclusions: This study discovered an alleviation in pain during the injection of buffered anesthetic solution over conventional anesthetic solution
L\u27Appel du Rupestre Land : revisiter l’art rupestre en le numérisant
No full textThis article attempts to explore the use of digital technology in preserving Moroccan rock art, emphasizing the significance of this art form in understanding the history and culture of our ancestors through digital tools such as 3D modeling, virtual reality, and others. This digitization effort aims to document and safeguard these cultural treasures while making them accessible to the public. The objective of the article is to examine the potential of digitizing rock art in our documentary film, The call of the rupestre- land We aimed to contribute to the digital conservation of heritage through audiovisual means. Indeed, this modest initiative complements the interdisciplinary efforts of dedicated researchers and the missions of local authorities in preserving this cultural heritage for future generations
L\u27utilisation des Technologies Numériques dans les Musées Contemporains au Maroc : Les défis de la préservation culturelle, de l\u27accès et de la justice dans l\u27utilisation de la réalité virtuelle et augmentée
No full textThis study investigates the impact of immersive technologies, particularly Virtual Reality (VR) and Augmented Reality (AR), on visitor experiences at two distinct museums: the Museum of Modern and Contemporary Art Mohamed the Sixth and the Exhibition and Museum of the Prophet’s Biography and Islamic Civilization. Employing a qualitative approach and a comparative case study methodology, the research examines the employment of VR and AR within each museum, focusing on their respective modes of projection and exhibition. While the Museum of Modern and Contemporary Art Mohamed the Sixth uses VR to establish a virtual space online, the Exhibition and Museum of the Prophet\u27s Biography and Islamic Civilization integrates AR to provide interactive information about exhibits. Despite extensive research on the applications of VR and AR across various domains, there remains a scarcity of studies in the museum field
The Impact of COVID-19 on Nurses\u27 Feelings, Stress, Coping, and Motivation in Palestinian Treatment Centers of Corona
Get PDFBackground: Frontline nurses of COVID-19 found themselves in an unfamiliar new disease work environment, fighting to adapt and control the stress while working at covid-19 centers in Palestine. Aim: To investigate the impact of COVID-19 on nurses\u27 feelings, stress, coping, and motivation in COVID-19 Palestinian treatment Centers. Method: A descriptive cross-sectional design was conducted between Mid of July to the end of October 2021 by recruiting a purposive sample of 390 nurses who worked at the Ministry of Health during COVID-19 pandemic treatment centers. The nurses filled out the COVID-19 Health Personnel Questionnaire with Cronbach\u27s Alpha \u3e 0.9. Results: Palestinian frontline nurses felt that financial incentives constitute a motivator to deal with corona patients. However, they do their duties as health professionals since they must follow ethical obligations (M= 3.78 and 3.75) correspondingly. Nurses have been resentful of wearing PPE every day and being a cause of transmitting the virus to Family or friends. These were the highest stressors (M= 3.91, 3.91, 3.82). They agreed that trusting the staff to care for them in case of infection with COVID-19 and working with all health professionals to overcome COVID-19 will reduce their stress (M= 3.70 and 3.68) in a high score. Whereas updating knowledge about COVID-19 was the highest coping mechanism by nurses (M= 3.93), followed by the usage of appropriate PPE (M=3.79). Also, they agreed that COVID-19 vaccinations were the highest motivating factor (M= 3.80), followed by family support (M= 3.79), according to Palestinian frontline nurses. Conclusion: The feeling, coping, and motivation mechanisms of Palestinian frontline nurses have been impacted by working with an unfamiliar infectious agent, disturbed by a long-time use of PPE and isolation from their families. Family-supportive dependent strategies should be adopted to keep our frontline nurses working with high performance and accepted quality in risky places, struggling countries, and crises
Fundus Retinal Images and Glaucoma Detection
Get PDFAbstract. Glaucoma is a severe eye disease that has no symptoms and, globally, it is the second cause of blindness. Glaucoma causes structural changes in the retina that make ophthalmologists detecting the disease in early stage and thus provide the suitable treatment. Fundus camera is an imaging technique that provides the fundus image showing the internal structure of retina. Our project provides an automated system for early detection of Glaucoma. The proposed system based MATLAB starts by acquiring the fundus image, followed by preprocessing stage, going through noise removal, enhancement, segmentation, feature extraction and ends up by the classification stage. Accurate and advanced algorithms are used in each processing stage to have a reliable and accurate automated Glaucoma diagnosis system. The image acquisition is achieved by using D.EYE case, preprocessing by ROI and using Gaussian filter, enhancement by using Histogram, segmentation by using Superpixel segmentation for cup and disc, feature extraction by doing CDR calculations and classification to identify glaucoma
Calculating the Radius of the Earth Using Sunset Method: Comparison with al-Bīrūni Method
Get PDFThis paper attempts to compare the earth\u27s radius calculation based on the sunset or sunrise (moonset or moonrise) with the Method developed by the scientist Al-Bīrūni. The sunset sunrise method is used to calculate the earth radius by standing in front of a flat horizontal plane. In addition, the authors have use Al-Bīrūni\u27s rule to calculate the radius. Furthermore, the error percent of both Al-Bīrūni and the sunset sunrise method were calculated as well. The results showed that the earth actual radius is 6371 km. Eratosthenes radius which is 6366 km is the closest to the actual earth radius, then comes Al-Bīrūni’s radius 6336 km and last but not least the Sunrise or Sunset (moonrise or moonset) radius 6316 km. Furthermore, the radius of Eratosthenes method has the least percent error which is 0.08%. The radius of Al-Bīrūni’s Method comes in second with 0.6% and the radius of the Sunrise or Sunset (moonrise or moonset) method radius has 0.9% which is the highest percent error
Transforming Education with AI: An Exploratory Study of Faculty Insights on ChatGPT\u27s Opportunities and Risks
Get PDFObjective: This study explores ChatGPT adoption in higher education, highlighting both its benefits and perceived risks. Method: This research adopts an exploratory and qualitative approach to deeply analyse instructors’ perceptions regarding ChatGPT adoption in higher education. This approach is implemented via semi-structured interviews with 25 faculty members from different nationalities. Result: The findings reveal that ChatGPT improves academic performance, research activities, and training, but also raises concerns about technology dependency, ethical implications, and diminished human interaction. Conclusion: Faculty members emphasize the need for thoughtful and balanced integration of this technology to maximize its benefits while minimizing its potential risks
The Impact of Employer Electronic Surveillance on the Privacy Rights of Workers in Palestinian Legislation: A Study in Light of French Judicial Precedents
Get PDFThe study focuses on the right to privacy and how legislation and judicial precedents can achieve a balance between protecting this right for employees and employers\u27 right to monitor performance and safeguard company interests. The research highlights a legislative gap in Palestinian law regarding the protection of workers\u27 private lives, compared to French law which provides greater safeguards for employees. The study offers recommendations to improve Palestinian legislation by drawing insights from the French model to enhance workers\u27 rights and achieve a fair and transparent work environment. This research is significant as it addresses contemporary challenges arising from technological advancements and the widespread use of the internet in the workplace, which impact workers\u27 personal rights and raise questions about the legal and ethical boundaries of electronic monitoring. Methodology: The study adopts a comparative analysis between Palestinian and French legislations, illustrating how Palestinian laws can benefit from French judicial precedents to develop practices that protect workers\u27 rights while allowing employers necessary oversight. Findings: The findings reveal that French law has developed clear legal provisions distinguishing between professional oversight and privacy protection, introducing the concept of right to disconnect as a means to balance these two aspects. Moreover, it has established procedural safeguards requiring employers to inform employees in advance of any monitoring measures taken. In contrast, the Palestinian Labor Law does not explicitly address these issues, offering only a general reference to privacy protection in Article 32 of the Palestinian Basic Law. Recommendations: The study recommends adopting clear legislation that delineates the boundaries between professional monitoring and workers\u27 privacy, including the right to disconnect in Palestinian laws to grant employees the right not to be electronically available outside working hours. Additionally, it calls for procedural safeguards requiring employers to notify employees in advance about monitoring measures, thereby increasing transparency. The study emphasizes the importance of effective negotiations between both parties to clarify expression mechanisms and electronic monitoring procedures