Browsing Science, Technology, Engineering and Mathematics (STEM) by Title
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- ItemA cash and token paid entertainment content streaming site(2020) Munyao, Angela MusangiPeople that cannot afford subscription to paid and ad-free media hosting sites always have to deal with random and un-seamless popping up of ads as they browse, while viewing content on free media hosting sites, and mostly, these free media hosting sites lack current content such as recently released movies or songs. The solution proposed in this paper is a cash and token paid entertainment content streaming site with undisruptive ad hosting. In this site, users can access up to date content (songs, movies, comedy clips, and TV Shows), all they need to do is pay for the content in tokens, and they obtain the tokens by either converting their cash into tokens, or by watching ads hosted on a specified page within the site (Users can make a choice to visit this ads page or not, and hence do not incur random popping up of ads while browsing). The aim of the solution is to accommodate users that cannot afford money-paid media hosting sites but desire to watch up to date content with minimum or no disruption from ads, and it achieves so by creating a fair playing field between ad-owners and content viewers by sharing some of the revenue generated from hosting ads with the ad-viewers.
- ItemA credit scoring system for mobile money users: A case study of Berekuso, Ghana(2020) Melly, Viola CheptanuiAn estimated five billion people in the world own a mobile phone . Among these people, an estimated four hundred and fifty-six million people are from Africa, with eight million people being from Ghana . The high number of mobile phone owners shows the importance attached to the use of mobile phones. The curiosity and the availability of resources to develop new applications have led developers to come up with new and innovative ways that go beyond the primary intention for which the phone was created: communicating with one another. One such innovation is the development of mobile money services . This research seeks to find out how effective a credit scoring system would be in addressing the non-payment of loans by the customers of service providers. It proposes an online platform that provides users with financially related information and a credit scoring system that can help both lenders and borrowers check the creditworthiness of an individual before they get access to loans.
- ItemA data management platform and bulk SMS program for the Ritzz Exclusive Guest House(2020) Hijazi, MohamedBusinesses are using technology to gain a competitive advantage over players in their respective industries. The Ritzz Exclusive Guest House, a hospitality business in Ghana, needed an application that would integrate into its existing processes and enable it to communicate with their Ghanaian based clients to increase customer loyalty. This project proposes a two-in-one application, Bulker. The proposed solution will enable the guest house to send text messages to its local clients and allow them to receive responses in a cost-effective and user-friendly way.
- ItemA descriptive study on the application of project management tools in organizations in Ghana(2020) Gyapong, Yaa KorangThe introduction of project management tool into firms have catalyzed tremendous increases in the success rates of projects worldwide. The six key processes; Initiation, Planning, Execution, Monitoring, Controlling and Closing, that ensure the effective implementation of all projects have proven time and again to be one of the best guidelines in achieving this feat. Over time, various groups have postulated theories and developed tools that aim to ensure the effective execution of each of these six stages. These tools advanced efficiencies in completing projects, maximize limited resources such as time, human and capital resources, as well as gain a high reputation and standings in society for completing projects . Although these tools in isolation have aided project managers in successfully meeting the triple constraints of time, scope and quality, there still begs a need to push for the practice and use of project management tools in a more deliberate way, that will guide agile project managing companies to achieve their goals. In Ghana today, there is a grave lacking in project management professionalism which has heavily impacted the way projects are executed and managed. McKinsey Digital suggests project cost overruns of about 45% with 56% less value output than expected in large IT firms across the world . This study aims at exploring other implications of and various benefits associated with the use of project management tools in Ghana. I believe that there needs to be a holistic understanding of and presentation of these tools in a manner that best suits the Ghanaian context and culture to ensure that projects are executed professionally. Furthermore I aim at developing a model framework of a holistic project management tool that addresses and guides the six key stages of a project to achieve project success and reduce the level of project failure in Ghana.
- ItemA small photovoltaic inverter for grid-connected operation(2020) Oburu, David KatandiSolar energy being one of the most promising renewable resources, plays a very significant role in the energy sector of different economies in the world. However, the photovoltaic (PV) system still faces some challenges such as high costs, low efficiency and the photovoltaic (PV) system’s output power intermittent nature as compared to other renewable technologies. This project focuses on three key areas of PV grid-connected inverter control strategies that is the PV Maximum Power Point Tracking (MPPT) using perturb and observe technique, the PV gridconnected Synchronization technique using phase-locked loop (PLL) and PV inverter control using proportionate-integral (PI) technique to control the voltage and the current of the PV gridconnected inverter. The control techniques operate in such a way that during the grid-connected mode, the PV inverter output frequency and the amplitude is controlled by the grid and the inverter operates in a current-controlled mode. The inverter current-controlled mode of operation achieves two requirements that is, the excess energy generated from the PV inverter is transmitted to the grid under no overload condition. During unfavorable weather conditions or overload conditions, both the grid and the PV inverter operate in a voltage-controlled mode in order to maintain a constant frequency and amplitude of the voltage across the load. Simulations in MATLAB/SIMULINK have been used to verify the validity of the proposed system.
- ItemA web based application with numberous functionalities to support activities of African Polistas in Ghana(2020) Issah, SadatTechnology has become a core part of most businesses both in the formal and informal sectors. Businesses are leveraging on the potency of technology to improve processes and increase revenue. African Polistas is a polo club here in Ghana having a branch in South Africa, USA and other parts of the world. Currently the club does not have an online presence making it difficult to connect with its members and reach out to prospective members as well. Due to its absence online, the club is unable to sell its merchandise to a wider market. This project focuses on building a web-based application for African Polistas to give it an online presence. Among the features of the application are; e-commerce platform, a chatbot, community chat platform, service subscription and membership registration services. The e-commerce platform is to enable the club make sales of its merchandise online and reach a wider market. The community chat forum is to connect all members of the club so they can network and know each other. The club offers horse riding school services, tourism services, takes part in polo tournaments; registered members of the club should be able to sign up for these services.
- ItemActive cancellation of noise in acoustic signals(2020-05) Yirenkyi, OtemaIn the acoustic domain, sources of noise can be derived from music, vibration from an engine or a person shouting. There has been a rise in different technologies to combat the problem of noise. Passive techniques such as using soundproof materials have been developed, however they pose the challenge of weight from the bulky materials used. Active noise cancellation techniques although requiring complex computation, can cancel noise up to 50 decibels (dB), depending on the efficiency of the technology or algorithm used. In this project, an active noise cancellation device which has the capability of cancelling surrounding sound has been built using the filtered NLMS algorithm in a digital signal processor to create a region of silence. It is based on the principle of Destructive Interference. It is a more affordable rendition of existing products on the market which incorporate these same principles.
- ItemAdaptive credit card fraud prediction using Artificial Neural Network(2020-05) Abdul-Aziz, Juliet FatimaCurrently, there is a growth in online transactions which has led to the immerse growth of the number of credit card fraud. A lot more people are opting to shop online due to convenience and therefore they make online payments to make a purchase that would be delivered to them and in some cases, they make payments online for a service rendered to them. With such an opportunity, fraudsters are also increasing their fraud activities online. Therefore, this study seeks to detect credit card fraud using an adaptive tool and also attempts to reduce the number of wrongly predicted valid transactions made by the model. Researchers have used tools such as K-nearest neighbour, logistic regression, random forest, decision trees and others however, this study uses an autoencoder neural network to detect credit card fraud. The study then evaluates the model using an appropriate evaluation metric. Keywords: Fraud detection, adaptable, autoencoder neural network, credit card, online transactions
- ItemAn affordable density-based traffic management system(2019) Odero, Margaret AnyangoTraffic management systems at road intersections of most African cities is based on fixed timings where equal length of green light is assigned to each lane at the intersection. This method of traffic management is inefficient because it causes unnecessarily long waiting times for vehicles at the intersections especially during periods when some lanes have few or no vehicles passing through them. In this project, an affordable density based traffic management system is designed and implemented. This is achieved by selecting components that are low cost, consume low amounts of power and do not require digging onto the road pavements. A pi camera with night vision capability is used as the vehicle detection device for every lane. Image processing is then done using an algorithm running on a raspberry pi to determine the number of vehicles on each lane. This information on the number of vehicles is sent to a central raspberry pi via a radio transceiver which then uses an algorithm to determine the next lane to receive green light, as well as the green light duration. In testing the system, the best position of the camera relative to the lane is investigated in an experiment. The furthest distance the camera can be mounted is determined to be 30m. The night vision capability of the camera is also tested. Despite the advantages that come with this low-cost system, it has some limitations. The camera quality is low hence the image processing algorithm may not be completely accurate in distinguishing between objects in the image. The camera’s field of view is also small, necessitating the use of an extra lens that will increase its field of view.
- ItemAffordable desktop computing using low end hardware like Raspberry Pi and Cubiebaord NII LOUS NELSON(2014-04) Nelson, Nii LouisThe field of computer science over the past two decades has witnessed a huge leap in the areas of improved systems design, hardware processing power and the development of software that maximizes these advances in systems. This leap can attributed to continuous innovation that drives the field to new heights at an ever speedy pace. The pace at which the field is growing requires educators to be abreast with new and changing technology. It is the desire of educators to have access to physical laboratories and computing centers in which they can physically train students. The challenge faced by educators in executing this task is the high expense that comes with the construction of physical laboratories. This write up stems from a project that aims to tackle this challenge by providing low powered, low cost, portable computing systems for students, laboratories and computing centers using devices such as the Raspberry pi and Cubieboard. Although not a perfect system, it promises to be a desirable solution that can be adopted across a wide range of institutions.
- ItemAffordable digital guitar effects pedal for local guitarists.(Ashesi University, 2019-04) Hazel, VictorMusic has been a mode of communication and a source of identity for many cultures, especially in Africa. The sound from the guitar is one of the many components that make up music, The electric guitar is a musical instrument, usually made up of six strings which is connected to amplifiers to produce sound. Technological advancement has led to the creation of Guitar effects pedals. However, manufacturers keep making new models of guitar effects pedals with a continuous increasse in cost. It is therefore difficult for low-income young guitarists to have access to guitar effects pedals. This project seeks to use a general purpose microcontroller to create a very affordable guitar effects pedal.
- ItemAffordable smart refrigeration for professionals(2020-05) Dadzie, EwuradjoaInternet of Things is a growing industry all around the world, in which numerous applications and innovations are being made, smart home automation being one of them. In Ghana, the traction or adoption of these technologies is low, because of the cost and ineffectiveness associated with appliances such as a smart refrigerator. The aim of this project is to design a system that accounts for the ineffectiveness of current smart models, and economizes on the cost of creating such a system. Various parts of such a system were individually simulated and tested, using sensors, NodeMCU, a Raspberry Pi, and a Raspberry Pi camera. Web and mobile applications were built to interact with the user. Each system part was successfully simulated; however, the system could not be tested as a whole, due to modifications that had to be made while simulating. It was realized that with the implementation done the objectives of the project would be achieved if properly deployed. The impact of the work done would increase traction and adoption of smart refrigeration in Ghana as it would be more affordable and more relevant to the Ghanaian context.
- ItemAffordable solutions for computers in schools: Operating system and tools on a USB flash drive(2014-04) Agoe-Ashiakwei, EbenezerOver the past few years, there have been numerous developments of more efficient and portable ways of using computers. Hardware and storage have been designed to provide progressively smaller systems for computing while speed and data performance has greatly increased. The purpose of this project is to provide a complete Operating System and tools on a USB flash drive. This is done with the aim of providing users with a much more portable, durable and affordable outlook to computing. Users can also share or reuse the same hardware while keeping their operating systems and data separate. This project is necessary as other options require people to have and carry their own hardware, or rely strictly on the operating systems preinstalled on existing machines. Customers have preference for portable and cost-effective devices, while administrators want to simplify asset management. Overall, this project offers a new outlook on using IT hardware while bringing choice and convenience to end users.
- ItemAge estimation using biometric features among the black race(2020) Asiedu, BerlindaThe estimation of a person’s age based on their face is usually done effortlessly by humans based on their intuition. However, age estimation from facial images has become one of the biggest challenges in the area of face recognition. This challenge is mainly due to the unavailability, underrepresentation and different forms of data that are used in training age estimation models. Data as a relevant component of artificial intelligence is key to the efficiency of age estimation models as well. An underrepresentation of face images belonging to people of the black race has raised concerns on algorithm biasedness and inaccuracies. With the motivation to rule out this biasedness, this study undergoes a data collection of face images of the black race, creating training and testing datasets for the proposed model. A hybrid KNN Classifier and Support Vector Regression (SVR) model approach is presented for age estimation using face images of the black race. The results of another hybrid model is compared to the KNN-SVR model on three datasets. It is concluded that the KNN-SVR fusion produces a highest accuracy on the newly created dataset.
- ItemAn alcohol detection system for vehicles(2020-05) Yelipoie, EdnaDrunk driving is a contributing factor to road accidents in several parts of the world. Road accidents caused by drunk driving are usually fatal and have an adverse on the victims and the government, in the long run. Government policies have been implemented to deter individuals from indulging in drunk driving. Positioning police officers with alcohol breath analysers at vantage points on the road has also employed to curb the menace of drunk driving. However, these strategies have barely been able to reduce the rate at which road accidents caused by drunk driving occur. In this project, alcohol breath analysers have been integrated with the ignition system of vehicles to prevent drunk drivers from moving their vehicles.
- ItemAn algorithm for multi tempo music lyric transcription(Ashesi University, 2018-04) Amoah, HectorThis paper documents an attempt to create an algorithm for multi-tempo music lyric transcription. This paper reviews music information retrieval as a field of study and identifies music lyric transcription as a subset of the music information retrieval field. The difficulties of music lyric transcription are highlighted and a gap in knowledge in the field is identified. There are no algorithms for music transcription that are applicable to all forms of music; they are usually specialised by instrument or by genre. The author attempts to fill this gap by creating a method for multi-tempo music lyric transcription. The methodology used to achieve this goal is a three-step process of taking audio as input, processing it using the REPET separation technique, and transcribing the separated audio file. The result of this paper was a relative success, with the music being separated successfully and the lyrics being transcribed but with accuracy lost.
- ItemAn Intelligent Telehealth System to Manage the Spread of COVID-19 at Hospitals(Ashesi University, 2022) Adorkor, Jeffrey KafuiWith the outbreak of the Coronavirus, people who visit hospitals are put at risk of contracting the virus in addition to their existing condition. As a result of the risks associated with the COVID-19 virus, unique and innovative solutions must be introduced to help reduce the spread of the virus. This project proposes an Intelligent Telehealth system to help manage the spread of the COVID-19 virus by reducing the number of physical interactions at hospitals. This system would help reduce the number of physical interactions at hospitals by instituting virtual consultations between doctors and patients. These consultations would include special features such as a Computer Vision component to monitor facial expressions. These special features would ensure that the gap between physical healthcare and virtual healthcare is bridged. The system was implemented as a mobile application for patients to create and manage bookings with doctors and to manage their medical records as well. A web application was also built to handle video consultations and to give doctors the opportunity to update the patient’s medical records during consultations. After the system was implemented, it was tested with three patients to measure its usability and usefulness. Scores were measured on a scale of 1 - 5 and all patients had scores ranging from 3-5 thus showing the usefulness of the system.
- ItemAn IoT fall detection and alert system for elderly persons with stroke and heart attack(2020) Mohammed, Sharhan AlhassanAbrupt falling of the aged population is a rising concern among other chronic sicknesses faced by older people in the world. Elderly patients are disposed to falling abruptly due to heart-related diseases, muscle weakness, high blood pressure, and balance-related diseases such as labyrinthitis – inflammation of the delicate balance regulating parts of the ear. This project focuses on the design and development of simple, low-cost fall detection, and smart alert system. The system detects the fall of a patient using the device's gyroscopes and accelerometers to send an alert message via mail to the caretaker for immediate intervention. The device also possesses a panic push button that can be used by the patient to call for urgent help. The device's buzzer is used to make an alert sound for caretakers who are around the patient's vicinity to respond urgently. Data collected from the device are stored in a database and further aggregated to give the patient's fall history in a web application. The web application displays the patient's fall history by showing the patient’s name, age, state, time of fall, and their condition.
- ItemAn IoT system for recycling organic food waste into compost/fertiliser supplement(2020-05) Meselebe, SybilIn recent times, the issue of food wastage has slowly become one that is of great concern. The Internet of Things is an evolving technology that provides solutions to problems. This work implements an IoT hardware system that allows for the biological fermentation of organic food waste into compost/fertilizer. The main objective of the project is to monitor conditions in the IoT system through a mobile and web application. Using statistical, descriptive and predictive analysis methods, the project was able to implement a 91.1% accurate system. Results show that data from the system are consistent and high levels of waste induces higher temperatures and humid conditions. This project will help curb the issue of food waste in homes by providing an alternative use for organic food waste.