Abstract:Higher education institutions worldwide have been greatly affected by the COVID-19 pandemic about two years ago. As a consequence, learning and teaching mode were then changed into online platform. Today, even though most of the class activities have resumed back to physical mode, online learning is still remained as an important platform for learning. Apart from desktop computers and laptops, students use smartphones considerably for online learning. However, the physical characteristics of a smartphone could hinder its ability to work as an effective tool for academic task. In the context of online learning, this study aims to explore the adoption of an advanced feature of a modern smartphone: the desktop mode, which could possibly overcome the physical limitations of a standard smartphone. The factors that influence the undergraduate studentsï¿½ intention to use the smartphoneï¿½s desktop mode for online learning were examined. By using constructs from the Unified Theory of Acceptance and Use of Technology 2 (UTAUT2), Learning Value (LV) and Empowerment in Learning (EiL), the PLS-SEM method was used to analyze the data collected with a self-administered survey. The results revealed that Performance Expectancy, Social Influence, Hedonic Motivation, Habit and EiL positively influence studentsï¿½ behavioral intention (BI) to use smartphoneï¿½s desktop mode in online learning. Additionally, gender was found to have moderating effects on the relationship between some constructs and BI.
Abstract:Welding, a crucial manufacturing process across various industries, involves forming permanent component joints. Friction stir welding (FSW), an efficient technique is employed for this purpose. FSW requires a fixture to securely hold the workpiece during welding, ensuring precise alignment, minimal deformation and effective heat dissipation. This work focuses on designing a fixture tailored for T-joint configuration FSW of aluminum alloys. Initial concept design was refined for optimal performance with material selection (Mild Steel and EN8) based on requirements. Real-time welding conditions were considered for analysis, leading to the choice of EN8 due to reduced deformation. This paper outlines the steps involved in designing, analyzing and manufacturing a T-joint welding fixture, guaranteeing proper alignment, clamping and heat management during welding.
Abstract:Because of the global warming, the phenomenon of Solid Transport (bedloading transport and suspension transport), have increasingly serious impact on the normal function of hydraulic road drainage in the Higt atlas Morrocco. Indeed, they are clogged even if they are recently built, which generates the submersion and flooding of neighboring areas. This causes enormous material damage and threatens the safety of local residents.\nSo, in this work, we studied and quantified the solid flow as part as the design of hydraulic structure \" drain \" on flow crossing the Provincial Road RP 2010 in the “LAHJAR River Site” in the High Atlas Morrocco. The area study is located in the “Ourika” watershed. It is also called “LAHJAR” because il carries lot of pebbles each time the flood passes.\nWe tested the most widely used calculation methods worldwide in this study. After checking the field results (the 100-year solid deposition height at the structure = 1.5 m), we found that: \n- the formulas of Van Rijn, Engelund Hansen, Rickenmann gives values negligible. \n- the values from the formulas of Meyer Peter and Müeller, Watanabe, Ribberink, and Parker, are comparable to those observed.\n- the formulas of Schoklitsch and Sogreah, give excessive results.\nThus, this heigt of solid deposit is also important that liquid and must be considered in the design study.
Abstract:Abstract. Purpose: to experimentally find out whether aerobic classes included in the program of sports-oriented table tennis groups of a higher educational institution have an effect on the speed of students (running for 15 seconds in place) and to investigate the necessity of including these classes in the curriculum of physical education. Materials: 106 first-year students participated in the experiment (53 – control group and 53 – experimental). The R/S method was proposed for processing experimental data. At the first stage, a ascertaining experiment was conducted. At the second stage, the introduction of aerobic activities into the table tennis curriculum. At the third stage, a repeated comparative experiment was conducted, the purpose of which was to check the degree of influence of aerobic classes on the speed of students. Results: at the end of the experiment (May), the results of the students of the experimental group were qualitatively different from the results of the students of the control group. The results of the experiment indicate the need to include aerobic classes in the curriculum for physical education of students in sports-oriented groups, in particular (sectional classes) table tennis. The experimental program combines a training program with a sports orientation (sectional classes) in table tennis - 75% of the total and aerobic classes (cross training and basic aerobics) - 25%. Conclusions: the effectiveness of the methodological approach to the development of a physical education program for students of groups with a sports orientation, which combines generally accepted means of developing physical qualities and the latest methods for their improvement, has been experimentally proven. This experiment proved that the development and inclusion of table tennis, aerobic classes (cross training and elements of basic aerobics) in the educational program with a sports orientation (sectional classes) had a better effect on students\' running of the 15-second run. And the method of exponential smoothing makes it possible to predict future results.
Abstract:Backgroud. About 50 percent woman had psychiatry symptom before pregnant. They had consumed drug for the rest life. The drug was valproic acid. Consumtion this drug during pregnancy would made neurodevelopmental disorder like Autism Spectrum Disorder (ASD). Brain Derived Neurothropic Factor (BDNF) have a role in development of Nervous system dams. The serum level increase during pregnancy and exercise Valproid acid which is consumed in pregnant may cause the decrease of BDNF level. Aims. Our study aims to investigate serum level of pregnant mice exposed to valproic acid and to investigate relationship level of BDNF with two condition exercise or not in short time. It is important to study to know, if BDNF level of mother is the better marker risk factor born child with ASD. Method. Pregnant mice differed into 4 group (control/1, control with exercise/ 2, valproid acid / 3, valproid acid with exercise /4). Valproic acid 500 mg/weight single dose was given at 16 days pregnant continue exercise for 4 days. Serum BDNF mother was examined. Result. Statistically, All groups had no significant value (p>0,05). But mean of both valproid acid groups, relatively decreased than control group. Exercise did not change the level.Conclusion. It could be concluded that consumtion of valproic acid could changed physiology of secretion of BDNF during prenatal, this is may be the causa of neurodevelopmental Disorder.
Abstract:Background: Using digital technology in dentistry is considered as a valuable method in case of saving time and approaching patients properly. Virtual articulator is considered as one of the new trends in recording occlusion digitally, though it requires more evaluating studies. \nAim of the study: The purpose of this study was to systematically review the existing literature and conclude the efficiency of virtual articulators.\nMaterial and methods. This systematic review was conducted in accordance with the guidelines of the 2020 Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) statement for improving the quality of systematic reviews. An advanced systematic search was conducted on electronic search was performed in February 2023 using the PubMed search engine of MEDLINE (PubMed) database, EBSCO Host, OVID, Wiley Online Library, Scopus, and Science direct while a library printed search in Damascus University and Saint Joseph University as well.\nResults. The initial electronic search yielded a total of 281 article titles and two unpublished theses. After deduplication, “title and abstract” and “full-text” analysis of the list of articles, a total of 5 studies were selected for reviewing.\nConclusions. Virtual articulator is important in enhancement clinical work and reducing the time consuming for achieving dental treatment planning. However, a limited available information regarding which virtual articulator settings have the most influence on the accuracy of occlusal records.
Abstract:A guelta is a small body of water that accumulates in the wadis, or drainage channels of the Sahara or desert after rainfall. These gueltas are used mainly by wild animals for drinking and plants that grow near them. Identifying these gueltas in areas with short water supply is of most importance. Identifying them on the ground requires enormous resources, experience and knowledge. Geographic Information System (GIS) is an incredibly powerful tool for analyzing an area and it is used in many ways, such as mapping the size of a Guelta or predicting where water will flow during devastating storm events. In this paper we review published work that combined Guelta determination with GIS or remote sensing technology. The aim is to establish a comprehensive reference where researchers can start from. Relevant research is scarce and basic. There is plenty to be learnt from research on surface water detection (wetlands) and applied to Guelta research.
Abstract:Agriculture is still a backbone for most developing economies, with large rural inhabitants entirely dependent on it. Creation and sustaining employment improve society\'s livelihood while the working environment contributes to the welfare of the employees. Workplace dynamics are a reflection and cornerstone of the organization\'s performance, making or breaking the organization. With a common notion that workplace dynamics are essential for both the employer and employees, the study investigated the determinants of the said workplace dynamics on the long-term commitment of the general farm workers. The study was conducted in the Greater Giyani municipality of Limpopo province, South Africa. A simple random sampling technique was used to select 109 general farm workers. A Binary Logistic Model (BLM) was used to investigate the determinants of the workplace dynamics on general farmworkers\' long-term commitment to their jobs. The study used three segments of workplace dynamics, namely, workplace arrangements, staff treatment, and contractual arrangements, to identify the said determinants. The study findings reveal that a healthy and respectful supervisor-employee relationship and open communication are positive determinants of employees\' long-term commitment to the company. The study recommends forming agencies that manage farmworkers\' databases and oversee their contractual arrangements to ensure adherence to the relevant legal statutes and safeguard the working environment.
Abstract:This study was conducted to examine the effect of animal manure and inorganic fertilizers on the scent composition of Rosa damascena Mill. in 2022. Animal manure (AM), nitrogen phosphate (NP 20-20-0), diammonium phosphate (DAP 18-46), monoammonium phosphate (MAP 24-61), and triple superphosphate (TSP) were used as fertilizers, along with a control group. Headspace solid-phase microextraction gas chromatography–mass spectrometry was utilized to analyze the volatile components of roses. Major components were heneicosane (15.89–27.76%), citronellol (8.90–18.30%), nonadecene (7.90–13.83%), geraniol (6.14–8.27%), nerol (3.03–6.90%), eicosane (1.13–7.85%), and germacrene-D (2.41–5.45%). The highest percentages of citronellol (18.3%), nerol (6.9%) and total terpenes (55.77%) were obtained by animal fertilization, while the highest percentage of long–chain (aliphatic) hydrocarbon (43.60%) was obtained by NP (20-20) fertilization. The control group had the greatest level of geraniol (8.27%), followed by applications of TSP and animal manure (7.39% and 7.20%, respectively). Methyl eugenol (ME) was most abundantly produced by TSP (0.85%), whereas it was least abundantly produced by the control group (0.13%). The closest ME (0.20%) to the control group was produced by animal manure application. Based on the findings, it can be concluded that animal fertilization used in organic agriculture enhances the quality of plant essential oils.
Abstract:This study aimed to investigate the compressibility properties of Pioglitazone Hydrochloride (PGZ) oral dispersible tablets using compaction simulator. The tablets were prepared and formulated by direct compression method with varying particle sizes of PGZ in mannitol-based formulations, containing Ludiflashï¿½ and its corresponding physical mixture. All formulations were compressed at different compaction forces (5kN ï¿½ 20kN). Powders were evaluated for their tablet properties, such as hardness, friability, disintegration time, and dissolution rate. Results showed that all formulations exhibited good compressibility properties. The compaction force and choice of excipient played a vital role in formulation performance and drug release profile. With the use of Minitab 19ï¿½ an optimized formulation was derived, and all predicted output were seen to be within range after evaluations. In conclusion, the combined use of compaction simulator and Minitab 19ï¿½ were found to be useful tools in predicting the compressibility properties of PGZ and therefore developing a robust oral dispersible tablet. These findings suggest that the compressibility properties of PGZ oral dispersible tablets can be effectively modified by adjusting the critical process parameters (CPP). Hence, providing valuable insights into the compressibility behavior of PGZ oral dispersible tablets and also aiding in the development of optimized tablet formulations.