Caritas University Journals
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Another Look At Oramedia Hypothesis
Get PDFThis paper proposes a re-visit of Oramedia hypothesis as an unfinished project in media theory formulation. The originator of the project, late Professor Frank Ugboajah could not conclude the process before his demise. The study specifically wants to know whether the project has been abandoned. Based on this inquiry, the paper sought the opinion of Igbo speaking communication scholars from various Nigerian Universities and Polytechnics. Online survey research method was adopted for the study. Findings show that people nearly abandoned that noble idea of having an Igbo scholar’s attempt to develop a theory. It concludes that since our communication and media scholars are zealous in their research approaches, they cannot leave the work uncompleted. It recommends for reawakening spirit towards the project, in a view to actualizing the dream
Awareness And Use Of Dubawa Fact-Checkers Among Ebonyi Journalists
Get PDFThe reality of post-truth media era has created a demand on professional journalists to get equipped against fake news and mis/disinformation. This survey researched sought to find the rate of awareness and use of Dubawa Fact-checkers by practicing journalists in Ebonyi state, Nigeria. Employed a census sampling, the work surveyed 226 NUJ registered journalists in Ebonyi state. Anchored on the tenets of diffusion of innovation theory by Everet Rogers, the work found that there is high rate of awareness of Dubawa among the Ebonyi journalists but with low knowledge of Dubawa fact-checking process. The research found that only 16% of Ebonyi journalists have been trained by Dubawa Nigeria. Also, the work discovered that the Dubawa objectives of trained journalists to train their colleagues have not be executed in Ebonyi state and this affects the rate of impact of Dubawa Fact-checkers in journalism practice in Ebonyi state, Nigeria. The work therefore recommends that NUJ should create avenue for the attainment of Dubawa target. Dubawa Fact-checkers should use virtual class where there would be unrestricted participation of journalism on fact-checking trainings
Development And Implemention Of Modified Sinewave 3.5kva Inverter
Get PDFThe instability of Nigeria’s power supply has driven research into alternative solutions within the power sector. This paper focuses on the design and construction of a 3.5 kVA single-phase modified sine wave inverter, capable of efficiently converting DC voltage to AC voltage at a reduced cost. The system allows for adjustable output voltage and frequency through an integrated oscillator circuit (SG3524N), transformers, and precise switching and control circuits. Key components, including MOSFETs, diodes, resistors, and deep-cycle batteries, work collectively to meet the functional requirements of a reliable inverter. Challenges encountered during design were addressed, resulting in an inverter that delivers a stable output current of up to 15.9A and a consistent 220V AC output from a 24V DC input during performance testing
Application of Mechanistic Design Model for Sustainable and Effective CSTR Operation during Titanium Dioxide Production
Get PDFThis study optimizes the production of titanium dioxide, a crucial material in various industries, through hydrolysis of titanium tetrachloride in a continuous stirred tank reactor (CSTR). Using mathematical modelling and MATLAB simulation, the research determines the ideal CSTR design specifications and reactor thickness to ensure efficient, sustainable, and corrosion-resistant operation which improves the lifespan of the reaction media. The CSTR design models were developed from the first principle of mass and energy balance and simulated using MATLAB R2023a version to obtain the CSTR design specification and the relationship between the fractional conversion of the feed materials and the functional parameters of the reactor. At a maximum fractional conversion of 0.9, the CSTR volume, height, diameter, space-time, space velocity, the quantity of heat generated as well as the quantity of heat generated per unit volume of the reactor were obtained as 26.6884m3, 5.1416m, 2.5708m, 4.1021sec., 0.2438sec-1., 806.7600J/s, and 30.2288J/m3s respectively. The mechanistic design model showed that a thickness of 6.500mm for the reactor body (cylindrical) and head (standard ellipsoidal) is specifically recommended for stainless steel type (304) for construction. Also, the design of the CSTR agitator height and diameter were obtained as 4.6416m and 1.5708m respectively. This article showed that the design and thickness specification of the CSTR is crucial for optimum, continuous and sustainability of titanium dioxide production
Assessment of selected Properties of Rice Husk -Derived Graphene - Modified with Green Synthesized Silver Nanoparticles / Polyester Nanocomposite
Get PDFRice husk-derived graphene, doped with silver nanoparticles and polyester nanocomposites, was developed to explore its potential application as a conductive material for engineering applications. This research aims to develop conductive rice-husk graphene nanoparticles (Gr.NPs) mixed with orange juice-modified silver nanoparticles (Ag.NPs). This modified graphene was used to fabricate nanocomposites based on a polyester matrix. Nanocomposites were developed, and their electrical, thermal, microstructural, and mechanical properties were analyzed using standard analytical instruments. Electrical conductivity (2.08 x 10-8 S/m), dielectric constant (5.95), and thermal conductivity (1.45 Wm-1K-1) were obtained due to the high electron mobility of AgNPs and GrNPs, which increased the electrical conductivity of the polyester. An improved tensile strength of 92.35% was achieved for the developed nanocomposite. The AgNPs ensured good dispersion of the GrNPs in the polymer matrix. Consequently, rice husk finds application in the development of conductive polyester-graphene nanocomposites for a wide range of Engineering applications
Design, Construction and Characterization of a Model Heat Exchanger Unit for Preheating Lubricating Oil
Get PDFThis project work is the design, construction and characterization of a model heat exchanger unit for preheating lubricating oil. The experiment Heat exchanger rig was developed using a 30 liters water reservoir, oil reservoir (10 liters), PVC pipe (0.012m diameter, 0.7m long), 0.5 HP Electric pump and other fittings; with the assembly of these components at the Mechanical Engineering workshop, Caritas University, Amorji-Nike.The performance of the heat exchanger unit was evaluated by the assessment of such parameters like the convective Heat transfer of the rig, viscosity index and flash point of the oil at various temperatures ranging between 500C to 1000C. It was observed that the flash points of the oil increased with increasing temperature and the kinematic viscosity increased. The design study indicated that the Heat exchanger rig performance is above seventy percent (70%)
Automated Usb Controlled Power Switch
Get PDFAutomated USB controlled power switches have gained popularity in recent devices. These switches are designed to plug into a USB port and allow users to switch on or off the power supply of the electronic device remotely. This technology is commonly used in home automation and IoT systems to control various appliances, such as televisions, speakers, and lights. The primary advantage of using automated USB controlled power switches is their ability to save energy. By allowing users to remotely switch off their devices when they are not in use, these switches can help reduce energy consumption and lower electricity bills. They can also help extend the lifespan of electronic device by reducing the amount of time they are powered on. Automated USB controlled power switches are relatively in expensive and easily controlled using a smartphone app or voice assistant, allowing users to turn on or off their devices from anywhere at any time. Additionally, some switches can be programmed to turn on or off at specific times, allowing users to automate their devices according to their schedule. However, there are some limitations and challenges associated with automated USB controlled power switches. One potential issue is the security of the devices and the data they transmit. If not properly secured, they can be vulnerable to hacking or other forms of cyber-attacks. It is important for user’s different types of electronic devices. Some devices may not be compatible with certain types of power switches, which can limit their functionality. In addition, some devices may require a certain amount of power to be constantly supplied in order to maintain their settings and configurations, which can be difficult to achieve with a power switch
Moderating Role of Socioeconomic Status in the Relationship between Neigborhood Disorder and the tendency to Commit Crime among Undergraduates of Nnamdi Azikiwe University Awka
Get PDFThe study investigated neighbourhood disorder and tendency to commit crime; and the moderating role of socioeconomic status among undergraduates of Nnamdi Azikiwe University, Awka. Participants from the study were randomly selected undergraduates who volunteered and were allowed to fill out a Google form, three instruments were used for data collection: criminal behaviour scale, Neighborhood disorder scale and interviewer-rated multivariate assessment of socioeconomic well-being. The study adopted moderated predictive design and analysis was carried out using process macro in the SPSS version 30.0. Results revealed that neighbourhood disorder positively predicted the tendency to commit crimes, socioeconomic status positively and significantly predicted the tendency to commit crimes and socioeconomic status significantly and positively moderated the relationship between neighbourhood disorder and the tendency to commit crimes among undergraduates. It was recommended that the government should provide a secure environment to enable all people’s freedom to engage in economic activities.  
The Motivation of Women Entrepreneurs on the Growth of Small and Medium Enterprises (SMEs) in Ogun State
Get PDFUndoubtedly, Small and Medium Enterprises (SMEs) promote economic growth. Thus, the study investigated the motivation of women entrepreneurs on the growth of SMEs in Ogun State. It involved one hundred and fifty (150) participants (150 females) in Ogun State who were randomly selected among the population of women entrepreneurs. Their ages ranged between 19 to 70 years with a mean age of 31.86 years (SD = 8.66). Cross sectional design was adopted. Two instruments were used for data collection. Women’s Entrepreneur Development Assessment (WED) (ILO, 2016) and Performance of SMEs (PSMEs), (Maduekwe & Kamala, 2016). One hypothesis was tested. Hierarchical multiple regression was the main statistics used for data analysis. Result of a Hierarchical multiple regression analysis showed that performance was a positively significant predictor of SMEs’ growth (β = .17, p < .05), accounting for 3% of the variance in SMEs’ growth (∆R2 = .03). The result also showed that motivation was not a significant predictor of SMEs’ growth, although it accounted for 3% of the variance in SMEs’ growth (∆R2 = .03). However, the two predictor variables in the regression model contributed 5% to the explanation of the variance in SMEs’ growth (total AR2 = .05). The implications of these findings were discussed, and suggestions for further studies were equally made
Digital Eye: The Role of Technology in the Life of the Blind and the Visually Impaired
Get PDFIt would have been unthinkable 30 years ago that cell phone would read, print documents and describe things to the blind. Today’s technology not only makes life easier for everyone, but it allows the visually impaired to do numerous things such as write documents, browse the internet and send and receive emails. Screen Reading software and special talking and Braille devices allow those with no vision to use computers, cell phones and other electronic devices independently. Similarly, people with low vision can use screen magnification software and devices that will allow them to see letters, pictures and other objects without having to struggle or strain their remaining vision. It is now an established fact that, with proper training and opportunity, the average blind person can do the average job in the average place of business, and do it as well as his sighted neighbor. The skills of independent mobility, communication, and the activities of daily living are known, available, and acquirable. When an individual becomes blind, he faces two major problems: First, he must learn the skills and techniques which will enable him to carry on as a normal, productive citizen; and second, he must become aware of and learn to cope with public attitudes and misconceptions about blindness. These attitudes and misconceptions go to the very roots of our culture and permeate every aspect of social behavior and thinking. The first of these problems is far easier to solve and that is the focus of this paper