Sex: Male
Education
- Doctor of Philosophy in Electronics and Communication Engineering, De La Salle University
Field of Specialization
Optimization Modelling
Optimization
Control Systems
Researches
Article title: Modeling the effects of different environmental stimuli on radio wave propagation
Authors: Aaron Don Munsayac Africa, Ara Jyllian Abello, Joaquin Miguel B. Lalusin
Publication title: International Journal of Emerging Trends in Engineering Research 8(9), September 2020
Abstract:
Antennas are devices used either as a transmitter wherein electric current is supplied to the antenna then transmits that current as a radio wave or a receiver wherein radio waves are intercepted and converted to electric current. These electromagnetic radio waves are used for long distance communications. When designing antennas for the use of propagating radio waves, it is important to take into account that there can be possible losses or attenuations in real world applications. So in order for an optimal deployment of an antenna, modeling under harsh conditions should be good practice. This paper will consider the possible environmental conditions under which antennas typically operate at such as rain, fog, and other atmospheric gases. The modeling will be done by using the Phased Array System Toolbox that is available in MATLAB. The group will then make a script that will plot the various losses due to different environmental stimuli. © 2020, World Academy of Research in Science and Engineering. All rights reserved.
Full text link https://tinyurl.com/yhynrzes
Article title: Design of an Automatic Voltage Regulator Using MATLAB for Real-Time ECG Signal Transmission Monitoring applications
Authors: Aaron Don M. Africa, Jamie Lynn T. Chua, Pierre Randell S. Yao
Publication title: International Journal of Emerging Trends in Engineering Research 8(7), July 2020
Abstract:
This study tackles the issue of improving the design of the automatic voltage regulator system (AVR) based on the resulting transient response and steady-state error observed through the use of MATLAB. Focusing on the application of the AVR on the synchronous generator, three simplified designs were constructed and simulated as follows: an AVR without the controller, an AVR with a proportional- integralderivative (PID) controller, and an AVR with a PID controller and an additional voltage sensor. Upon evaluating the systems on parameters such as the response and rise time, the percent overshoot, settling time, the steady-state error, the peak time, and the step response, the results strongly indicate that the automatic voltage regulator with a PID controller and additional voltage sensor had the best stability and the most ideal steady-state error with a proportional gain of 1. The integral and derivative having gains of 0 shows that it has no role in shaping the response of the chosen system. The system created here can be used in the biomedical field like EVG Signal Transmission monitoring.
Full text link https://tinyurl.com/385h6wh4
Article title: Design and Development of a Pedestrian Controlled Stop
Light
Authors: Aaron Don M. Africa, Rica Rizabel M. Tagabuhin, Jan Jayson Tirados
Publication title: International Journal of Emerging Trends in Engineering Research 8(7), July 2020
Abstract:
Pedestrian safety should always be one of the priorities when implementing projects aimed at traffic. The vulnerability of pedestrians increases when they use the crossing roads, and it increases further during the nighttime since drivers have lower visibility of pedestrians on the road. This paper aims to reduce accidents relating to cars and pedestrians. Through the use of Arduino as microcontrollers and ultrasonic sensors, a smart pedestrian-controlled traffic light can be constructed to aid pedestrians crossing while causing a less negative impact on the traffic of the location. A control system will be utilized to analyze traffic and operate the traffic light depending on the data received by the sensors. The project is easy to produce and can be altered depending on the conditions of the location. The operation of the project aims to be useful for both pedestrians and drivers. However, the project cannot be applied to all traffic lights and must be strategically placed in specific situations to maximize the efficiency of the application of the project.
Full text link https://tinyurl.com/573r32jv
Article title: Commercial Air Sensor Alarm Systems
Authors: Aaron Don M. Africa, Phillip Christian C. Cardino, John Rossi Rafael R. Llaga
Publication title: International Journal of Emerging Trends in Engineering Research 8(7), July 2020
Abstract:
Polluted air has been a problem for most countries up until now. The pollution caused by modern-day technology has increased throughout the years of development and innovation. Humans have been discovering more advanced technology, but they have yet to find a solution to the common problems. It is well known that air pollution can cause various health issues and that it can be a big threat to the people who are exposed to it for prolonged periods. This study proposes a way to detect air quality inside structures using a commercial air quality sensor alarm system. This system can determine if the air within a certain area is harmful to humans. The group did not consider the total cost of the system if ever it is implemented. The use of it for outdoor purposes was also not considered since the goal of the study is to design an alarm using indoor air quality sensors.
Full text link https://tinyurl.com/r65sv82a
Article title: Modeling of a Temperature Controller using Heat Exchangers
Authors: Aaron Don M. Africa, John Arvin A. Mercado, Joshua Kenichi S. Sim
Publication title: International Journal of Emerging Trends in Engineering Research 8(7), July 2020
Abstract:
Thermoregulators are devices or applications which control temperatures. Examples of such devices are air conditioners for the everyday use of people, or heat exchangers for use in industrial purposes like chemical power plants. These kinds of devices most of the time, if not all, require a feedback system for precise and accurate observation and monitoring of data and in turn maintain or manipulate the temperature to a more favorable value to lessen or mitigate damages and prevent such possible disasters. The paper aims to simulate a feedback-controlled heat exchanger system to lessen the errors done upon the physical execution. A program called MATLAB is required to show computations and calculations of possible outcomes with the user’s inputs as a simulation with ideally precise outcomes. A program for calculation runs through MATLAB while the simulation is shown for monitoring and observing on SIMULINK
Full text link https://tinyurl.com/4v62f23x
Article title: Development of Analysis Methods in Operating Systems
Authors: Aaron Don M. Africa, Floyd Robert C. Dim, Sandra Margarita L. Fernando,
Daniel Lester C. Guillermo, Leila Yasmin C. Young
Publication title: International Journal of Emerging Trends in Engineering Research 8(5), May 2020
Abstract:
The windows operating system is the primary user interface developed by Microsoft. This serves as a user's main interface when transferring or traversing through files as well as run programs. Each updated version of Windows comes with new menu designs and ideally a better performance than the previous versions due to better optimization. To observe these changes, Windows 7, 8 and 10, the 3 most recent versions, have been tested by measuring each of their boot-up time and performances. Results verify that Windows 10 has a faster boot-up time and better performance compared to the previous versions.
Full text link https://tinyurl.com/7e5jrjbj
Article title: Monitoring and Control Systems in Agricultural Machineries and Equipment with a Low-Power Smart Antenna System
Authors: Aaron Don M. Africa, Darlene Alyssa P. Abaluna, Kyle Daniel P. Pimentel
Publication title: International Journal of Emerging Trends in Engineering Research 8(5), May 2020
Abstract:
The agricultural industry today has been highly dependent on modern technologies such as automated agricultural machinery and equipment which are replacing the tedious tasks done by humans. The advancements in agriculture have been made successful through the continuous development of new systems and technologies and it has become an essential component for these technologies to be part of the next generation of animal and plant factories. In the future, the world is expected to have more people and more demand and consumption of the earth’s natural resources and materials. The challenge here is to reanalyze how agriculturally based systems can help meet the needs of the society. Also, as it moves away from the sophisticated manual process of doing farm work like planting, harvesting, fertilizing, etc. we move towards the automation of agricultural vehicles to help the farmers work efficiently and systematically.
Full text link https://tinyurl.com/3b8e86ya
Article title: Vehicular Speed Limiting Control System in Critical Zones Using Global Positioning System
Authors: Aaron Don M. Africa, Miguel Luis B. Esteban, Harley M. Orines
Publication title: International Journal of Emerging Trends in Engineering Research 8(5), May 2020
Abstract:
Road accidents usually occur due to drivers’ excessive speeds which often lead to loss of property or even casualties. Given that, road safety is a practice that all drivers must adhere to especially in critical zones where there is a higher risk of possible loss of property or lives. Despite all the measures given to drivers such as imposing traffic rules and attempts such as making use of speed limiters for speed regulation in critical zones, there is still a high number of reported accidents that exist due to drivers’ carelessness. The project aims to solve the problem by having a speed limiting control system that would act upon drivers’ carelessness especially in critical zones. The proposed system will make use of the Global Positioning System (GPS) technology to determine the location of critical zones and automatically adjust the speed of the vehicle once it reaches the speed limit.
Full text link https://tinyurl.com/48yynbp4
Article title: Ripe Fruit Detection and Classification using Machine Learning
Authors: Aaron Don M. Africa, Anna Rovia V. Tabalan, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 8(5), May 2020
Abstract:
One of the most important sectors in any country is the agricultural sector. However, in some countries, farmers and fishermen have limited technology compared to other developed countries. One of the effects of limited technology is the low quality of crops, fruits, and vegetables. This is because the quality of the products is only assessed depending on external factors like appearance, shape, color, and texture, which can be prone to human error. Determining the quality and ripeness level of fruit requires consistency, which can be hard and tedious for humans when it becomes repetitive work. This paper aims to present various methods and approaches on how ripe fruit detection and classification can be made easier and more convenient using machine learning and machine vision algorithms. Furthermore, this study presents systems that can be utilized in pre and post-harvest analysis. This paper aims to provide solutions using computer applications to help farmers have lesser manual labor yet more accurate data and results in the evaluation of crops.
Full text link https://tinyurl.com/ywb7svww
Article title: Fuzzy Logic Temperature Control: A feedback control system implemented by fuzzy logic
Authors: Aaron Don M. Africa, Arl Marion Josef L. Divino, Kyle Austin B. Hartigan-Go
Publication title: International Journal of Emerging Trends in Engineering Research 8(5), May 2020
Abstract:
This paper is meant to highlight and discuss the facts and uses of fuzzy logic in terms of a temperature controller. The purpose of this temperature control system is to heat a room to a specified temperature then tries to maintain it at that temperature in a controlled manner. This paper will highlight different possible concerns done in the system and possible solutions to this fuzzy logic pattern. The applications are far-reaching as the temperature control can be depicted and used in multiple control systems such as control temperature in air conditioning units, generators, temperature for aquariums, etc. All these applications with fuzzy logic can help dictate the amount of energy used constantly to save power while achieving the needed amount. The fuzzy logic in temperature control systems can vary and the truth table for the logic system may vary widely as well. However, the main point of the system is to create and apply control correctly. By making use of built-in functions that can potentially correct errors and predict patterns in terms of date and time of the year, the time of the day and the flow of air, etc. It can effectively correct and make adjustments for the temperature correctness.
Full text link https://tinyurl.com/u26mhhcb
Article title: IoT Technologies Systems on Medical Monitoring and Management Systems with a Real-Time ECG Signal Transmission Monitoring Algorithm
Authors: Aaron Don M. Africa, Bryon Gil Cajayon, Adrian Alano
Publication title: International Journal of Emerging Trends in Engineering Research 8(5), May 2020
Abstract:
The concept of the Internet of Things (IoT), revolves around connecting a data network that extends beyond the standard computers and smart devices, into simpler everyday objects, such as lighting, air conditioning, medical equipment, and street signs, which allow them to be remotely monitored and controlled. Even though this concept of having a network of intelligent devices has been discussed for as early as the 1980s, it hasn’t seen much traction and implementation until recent years, thus, still making it an unfamiliar concept to many. With having a bunch of remotely controllable and accessible different everyday objects, this concept can be used in emergency situations, in order to reduce the impact of such occurrences, and hasten recovery. This study focuses to explore the different possible approaches in using IoT for hospital and healthcare management and specific examples of possible real-life scenario applications. By doing so, the paper was able to present possible parameters of measurement between different IoT healthcare networks to compare and determine the best possible implementation to use.
Full text link https://tinyurl.com/pjvcvxjm
Article title: Understanding Logical Reasoning Through Computer Systems
Authors: Aaron Don M. Africa, Tomm Kenzo Dolores, MarkquisCasslin Lim, Lia Sophia San Miguel, Vincent Rafael Sayoc
Publication title: International Journal of Emerging Trends in Engineering Research 8(4), April 2020
Abstract:
This academic research aims to expand the understanding of logical reasoning in computer systems. As applications innovate over time, modern technological innovations have created computer software which makes it possible to carry out day-to-day chores with a click of a button. Being in a computer engineering field, it is vital to obtain a logical sense of reasoning to be resourceful and establish technological solutions. Through innovation and advancements in technology, application developers have continued to lend an extended hand of ease into progression. This hand of ease is marked through applications that offer convenience. The components to obtain a logical application are the sensor, rough set theories, spatial images, and artificial intelligence.
Full text link https://tinyurl.com/ysdun2zm
Article title: Application of Computer Systems in VPN Networks
Authors: Aaron Don M. Africa, Christian Rodel V. Lontoc, Roger Jayson M. Mendez III, Francis Miguel Espiritu
Publication title: International Journal of Emerging Trends in Engineering Research 8(4), April 2020
Abstract:
The internet is a place to view any kind of information about almost everything present in the world. In present times, the internet is becoming more and more accessible to individuals all around the world. Once something is easily accessible to the public, it can be easily be violated and abused. In this sense, malware can be easily placed by hackers on the internet for an individual to stumble upon it and the viruses it contains can view significant files on the system of the user that has been infected. Hacking is an act where an individual tries to access another individual without their consent and usually steals information for their gain. A solution to this problem is the usage of a virtual private network (VPN). This academic research aims to present the basic information, significance, and applications of a VPN through various examples, and the computer systems related to it.
Full text link https://tinyurl.com/2bur294p
Article title: Simulation of FSK Modulation for Signal Transmission
Authors: Aaron Don M. Africa, Ara Jyllian A. Abello, Zendrel G. Gacuya, Isaiah Kyle A. Naco, Victor Antonio R. Valdes
Publication title: International Journal of Emerging Trends in Engineering Research 8(4), April 2020
Abstract:
This paper dives into the topic of using the frequency-shift keying method of modulation in a digital communications system. When using a communications system, to transmit a signal through long distances efficiently is by modulating the signal. In digital communications, there are three shift keying techniques; amplitude, phase, and frequency. This research focuses on the implementation of frequency-shift keying in modulating and demodulating a signal using MATLAB.
Full text link https://tinyurl.com/922vvd2b
Article title: Modes of Radio Wave Propagation: Troposcatter
Authors: Aaron Don M. Africa, Shawn Reece T. Wu, Isaiah Kyle A. Naco, John Joseph M. Castillo, Victor Antonio R. Valdes
Publication title: International Journal of Emerging Trends in Engineering Research 8(4), April 2020
Abstract:
This paper discusses the Yagi-Uda antenna and its properties. This kind of antenna array uses several metal rods, with one rod connected to the transmission line, while the others act as a reflector and directors. The setup provides more gain and better directivity. To demonstrate the Yag-Uda’s capabilities, an actual antenna array was constructed. The lengths of each element were calculated given a specific frequency. The antenna array was able to receive 9 channels with varying degrees of clarity, but the image and sounds can still be understood.
Full text link https://tinyurl.com/4v8yv8ah
Article title: Speech Emotion Recognition using Support Vector Machines
Authors: Aaron Don M. Africa, Anna Rovia V. Tabalan, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 8(4), April 2020
Abstract
The technology of recognition is one that has been developed continuously over the years and with its various applications in a wide variety of fields opens up massive opportunities to bridge the gap between humans and computers. Albeit common knowledge that computers are designed to make everyday life easier, there is still an indubitable lack of deep understanding due to the computer’s lack of knowledge in complex emotions present with human beings and this often prohibits computers to offer specific help that is suitable for its user. Therefore, it’s important to further develop today’s technology and one promising way to accomplish this task is to utilize Speech Recognition to recognize and classify emotions as well. This way, the computer essentially understands the user enough to give valuable aid instead of just preset actions. Support Vector Machine is one of the leading classifying algorithms in today’s time, boasting the highest accuracy rate which makes it the most viable option for this field of study
Full text link https://tinyurl.com/kef8wmrw
Article title: Computer Vision on a Parking Management and Vehicle Inventory System
Authors: Aaron Don M. Africa, Antonio Miguel Sarmiento Alejo, Grant Lewis Milan Bulaong Samantha Maxine Ronquillo Santos, Jerrick Spencer Kehyeng Uy
Publication title: International Journal of Emerging Trends in Engineering Research 8(2), February 2020
Abstract
Over time, scientists and engineers have developed technology that has improved everyday living. For every invention, they have found to reinvent it and create a better version of it. An example would be parking lots. From the usual time-in-time-out system; window cashier to parking spot back to window cashier, the hassle of this cycle was reduced through the use of license plate recognition which this study tackled. License plate identification technology has become a useful factor in different issues like parking management, vehicle owner recognition, etc. Computer vision has provided a means to reduce manual labor in parking lots by replacing them with sensors and scanners which would take over. This would be beneficial to the company as this technology would require minimal maintenance. Through image processing and enhancement, the license plates of these cars could be taken account of in real-time and this data could be used to generate the parking bills given the time-in and a time-out of the vehicle. This paper aimed to tackle the problems of car management and to further simplify the parking system.
Full text link https://tinyurl.com/vnxf628w
Article title: Global Positioning System Using Mobile Phones: Three-Dimensional Positioning
Authors: Aaron Don M. Africa, Francis Xavier Asuncion, Janos Lance L. Tiberio, Raymund Miguel Francisco A. Munchua
Publication title: International Journal of Emerging Trends in Engineering Research 8(2), February 2020
Abstract
Mobile devices such as cell phones are one of the most used technology nowadays. It can perform any feature that can be useful in everyday life. This paper showsdevices. Digital communication is one of the concepts that is applied in this research such as database monitoring and data transfer.
Full text link https://tinyurl.com/ctkhcms
Article title: Binary Phase Shift Keying Simulation with MATLAB and SIMULINK
Authors: Aaron Don M. Africa, Lourdes Racielle Bulda, Matthew Zandrick Marasigan, Isabel Navarro
Publication title: International Journal of Emerging Trends in Engineering Research 8(2), February 2020
Abstract
Digital Communication follows one fundamental concept and it is the transfer of information from one point to another over an analog channel. In our modern society there is one method which is versatile and widely used in transferring digital data and this method is called Digital Phase Modulation. In Digital Phase Modulation it is possible to use discrete values in the carrier frequency or amplitude in order to represent their values in ones and zeros. Given this possibility, it can be concluded that it is also possible to represent digital data using phase. Such technique is called Phase Shift Keying. The easiest approach to Phase Shift Keying is the Binary Phase Shift keying or BPSK. In Binary Phase Shift Keying, hinted from the keyword binary, it uses only two phases with each used for logic high and logic low which can be represented with a minimum and maximum value of 0 degrees for logic low and 180 degrees for logic high. This Modulation Technique utilizes a balance modulator which consists of a carrier sine wave and a binary sequence which is to be used as input in order to generate the Phase Shift Keying Output desired.
Full text link https://tinyurl.com/4a3t7jzv
Article title: Radio Wave Propagation: Simulation of Free Space Propagation Path Loss
Authors: Aaron Don M. Africa, Lourdes Racielle Bulda, Emmanuel Del Rosario, Matthew Zandrick Marasigan, Isabel Navarro
Publication title: International Journal of Emerging Trends in Engineering Research 8(2), February 2020
Abstract
In free space propagation, the propagation path between a transmitter and a receiver is direct to one another. Having no obstructions present in free space, there are minimal to no attenuation in signals. Still, there exists a free-space path loss. This is defined as the loss of the radio wave signal or its signal while it travels in free space. Determining the path loss is crucial for designing communication systems so that it can work at its best despite the issues that can be encountered. Additionally, path loss has been used in radio communications and wireless survey tools in order to identify the signal strength of antennas. With the increase in importance for wireless devices such as survey tools and software, it has become helpful to understand the concept of radio path loss as a whole. This paper focuses on simulating the free space propagation path loss to have a clear understanding of its function and the factors that affect it. The software used for this is MATLAB so that graphs can be obtained to have a direct and simple visual of the path loss
Full text link https://tinyurl.com/zb8vefb9
Article title: Development of a Reed-Solomon Error Detection and Correction System
Authors: Aaron Don M. Africa, Luis Anton D. Nieto, John Joseph M. Castillo, Shawn Reece T. Wu
Publication title: International Journal of Emerging Trends in Engineering Research 8(2), February 2020
Abstract
This project scopes into the Reed-Solomon (RS) Code as one of the optimal error detection and correction schemes. RS codes are codes in which adding unnecessary bits to a data in order for it to be reliably recovered even though the presence of errors in transferal, cache, and retrieval, is executed. The encoder for this specific code differs from a binary encoder in that it operates on the multiple bits rather than individual bits giving it the ability to precisely detect and correct error compared to other error and correction schemes. Its unique algorithm may be used in any analog or digital communication system because of it having the highest efficient use of redundancy, ability to adjust block length, has a wide range of code rate and is an efficient coding technique perfect for accurate and precise code error detection. Storage devices, wireless communication, satellite communication, digital television, and high-speed modems are constructs of Reed-Solomon.
Full text link https://tinyurl.com/wep49744
Article title: Emotion Basic action using Face Recognition and Detection ANN
Authors: Tun Tun Oo, Aaron Don M.Africa
Publication title: International Journal of Emerging Trends in Engineering Research 7(11), November 2019
Abstract
Face detection and recognition are the popular research area in the field of security vision and authentication because it is the first step in many applications like intelligence weapon with sensors and surveillance. Face detection and recognition algorithms are computationally intensive, which is challenging to prove face detection applications in real-time. Moreover, authentication of many security areas is a significant issue in the world of control, electronic, and communication. Face recognition is a secessionist of biometric verification and has been widely used at door control systems, video conference monitoring, weapons control systems, and network security, and so on. Face detection is used as a part of a facial recognition system by the author. Its technologies consist of the humancomputer interface, face database management system, video surveillance, and human behavior monitoring system. This paper is achieving face detection and recognition that will integrate with robot mouth emotional technology using database systems. The system will have a database of registered peoples. If the face matches the database, then it displays the friends, enemies, awesome things, annoys, and the robot mouth will be an emotion system. These six motors' emotion systems stilled testing by using outputs of computer programs or microcontroller systems
Full text link https://tinyurl.com/t58a9cwv
Article title: A Fuzzy Neural Control System
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 7(9), September 2019
Abstract
This research is an introduction to Neural Network Control, concepts about it, and current and past works relating to this topic. There are many uses of neural network control in the field of electronics engineering specifically in the study of feedback and control systems. Some of the concepts to take note about neural network control are the topologies, multi-layer controller, single-layer controller, and feedback linearization. Other topics and discussions related to neural network control will also be expounded in this journal.
Full text link https://tinyurl.com/tac54xxx
Article title: Fuzzy Logic Control System with Gaussian Membership Functions
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 7(9), September 2019
Abstract
One of the most widely known advanced control techniques is Fuzzy Logic Control. This paper aims to define the concept and function of Fuzzy Logic Control. Furthermore, this paper consists of brief discussion on how this type of control works, and how it is applied to several types of control systems. The procedure followed by this approach is explained and presented in this paper as well. This includes a discussion on the three steps namely fuzzification, Fuzzy Logic has become a popular approach in researches in the fields of science, technology, engineering, and medicine. This paper also shows the versatility of this approach in terms of numerous functions and applications.
Full text link https://tinyurl.com/ysd53mhs
Article title: Face Recognition Using MATLAB
Authors: Aaron Don M. Africa, Ara Jyllian A. Abello, Zendrel G. Gacuya, Isaiah Kyle A. Naco, Victor Antonio R. Valdes
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
This project dives into the topic of facial recognition and facial detection in a digital communications system. Face recognition is a technology that is widely used today which brings various benefits to society. Facial recognition differs from facial detection in the aspect that facial detection only finds and detects the present face/s in an image whereas, in facial recognition, the computer finds the face/s present in a subject and is able to distinguish the face from a sample of different faces. This research focuses on the implementation of both a facial recognition system and a facial detection system in MATLAB. This research would use the different imaging toolboxes available in the program and would be judged on its ability to accurately detect and recognize a sample in a given database. Additionally, this system should be able to create and to read a database of different faces
Full text link https://tinyurl.com/285sp7wk
Article title: Sensor-based Traffic Control Network with Neural Network Based Control System
Authors: Aaron Don M. Africa, Francis Xavier Asuncion, Janos Lance Tiberio, Raymund Miguel Francisco A. Munchua
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
Vehicle traffic congestion is one of the major problems in today’s society. It produces negative effects such as pollution and disorganized management of traffic flow. This paper provides research on a traffic control system using sensors and a neural network. It utilizes vision-based sensors to monitor intersection congestion data and sends this data to the surrounding stoplights to optimize traffic flow. The neural network will be trained to intercept the data collected in each stoplight and control the stoplight signals to direct the cars in the most efficient way possible. The neural net will be trained via simulation and be optimized based on the average travel time of each simulated vehicle tor rate its performance.
Full text link https://tinyurl.com/prfskhp8
Article title: A Study on Number Gesture Recognition using Neural Network
Authors: Aaron Don M. Africa, Lourdes R. Bulda, Matthew Z. Marasigan, Isabel F. Navarro
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
A natural way of counting is with the use of hands. As hand gesture recognition is becoming more recognized through its growing applications, this paper focuses on recognizing the number shown by the hand gesture. The code used in this study is developed by Makeshkha. This system uses an extraction feature which extracts the parts of the image of the hand gesture which is to be used by the system, and a neural network. This system has been trained for numerous iterations with the use of different input images. The network is then used in the recognition of hand number gestures. The system works by first prompting the user for an image to be used for input. The next process is the extraction of the features which goes by the reprocessing of the image through the removal or addition of noise in order to extract the required shape and form of the hand. Lastly, the Artificial Neural Network then scans the database for similarities in the image, with regards to the extracted features, from the input image. The experimental results of the study showed that the system has a considerable percentage of accuracy in the recognition of hand number gestures.
Full text link https://tinyurl.com/eafjdbte
Article title: Application of Computer Systems in Facial Recognition Efficiency
Authors: Aaron Don M. Africa, Gabriel Borja, Aivan Chua, Daniel Ong, Matthew Roque
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
This paper focuses on the application of computer systems in facial recognition efficiency for smartphones. The process of facial recognition is broken down into different stages and a simple system for each step is overviewed. These systems make use of various techniques such as spatial imaging, artificial neural networks, rough set theory, etc. However, as the systems created for this paper are simply overviewed, each stage is not tackled as in-depth. The shortcomings and difficulties encountered in facial recognition are also discussed. The systems created may still be effectively used as a basis for the improvement of existing and the creation of new facial recognition systems, especially if the given systems were to be made more concrete and each stage of image processing were to be tackled and dissected one by one. This paper also briefly discusses other applications of facial recognition outside of smartphones, such as in surveillance.
Full text link https://tinyurl.com/yt29j9v6
Article title: The Integration of Computer Systems into the expansive field of Video Games
Authors: Aaron Don M. Africa, Francis Miguel M. Espiritu, Christian Rodel V. Lontoc, Roger Jayson M. Mendez III
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
In today’s day and age, the recent generations are the targets of video game companies. Most companies asociated have goals that correspond with their target market. The companies create what the consumers want, which are video games. Everyone knows what are video games, but what are its comprised components? With that said, this research paper aims to provide information to the field of computer systems, more specifically, its integration with video games. Another objective of this paper is to give awareness of how computer systems work to give video games an extraordinary feel. This is important because individuals need to understand the various topics tackled by video games. These topics would include various computer systems like Spatial imaging, which is the ability to interact with 3D objects in a specific environment. Artificial neural networking and electronic sensors are some of the few computer systems to be tackled. The applications will be further studied so that the information on these systems can help give knowledge to people.
Full text link https://tinyurl.com/28hejw6k
Article title: Time Response Analysis of Control Systems
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
In time response analysis, there are many various sub-topics that are included. Some of these topics which will be discussed in this research paper are the different types of test signals, transient analysis and steady-state analysis concepts, first-order transient response analysis, second-order transient response analysis, higher-order LTI system transient response analysis, and under high order LTI system transient response analysis are the effects of adding poles and zeros and non-minimum phase for zeros, and lastly under systems is the effect of nonlinearities.
Full text link https://tinyurl.com/28zrssep
Article title: Time Response Analysis of Control Systems
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(4), July-August 2019
Abstract
In time response analysis, there are many various sub-topics that are included. Some of these topics which will be discussed in this research paper are the different types of test signals, transient analysis and steady-state analysis concepts, first-order transient response analysis, second-order transient response analysis, higher-order LTI system transient response analysis, and under high order LTI system transient response analysis are the effects of adding poles and zeros and non-minimum phase for zeros, and lastly under systems is the effect of nonlinearities.
Full text link https://tinyurl.com/28zrssep
Article title: ANN Distance Protection for Transmission Lines
Authors: Aaron Don M. Africa, Isaiah Kyle A. Naco, John Joseph M. Castillo, Victor Antonio R. Valdes, Shawn Reece T. Wu
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
When using transmission lines, faults often happen during the flow of signals. One way to protect transmission lines is to use distance protection relays. These types of relays, however, are still affected by fault resistance. Fault conditions often follow a certain pattern. Having a relay that recognizes these patterns can help improve performance. This paper presents a method to implement this using an artificial neural network (ANN). An ANN is one of the many applications of machine learning, which in meaning, is the algorithms that give the ability to computers to obtain knowledge through data and adapt to make certain deductions and choices. This paper will only consider the effect of the fault resistance of a single line-to-ground type of fault. The ANN should be programmed to identify numerous patterns that each correspond to different fault conditions. This will help in identifying and classifying unknown patterns detected in the transmission lines.
Full text link https://tinyurl.com/6s964ffu
Article title: Effect of Dielectric Substrate on Dipole Antenna Directivity
Authors: Aaron Don M. Africa, Antonio Miguel Sarmiento Alejo, Grant Lewis Milan Bulaong, Samantha Maxine Ronquillo Santos, Jerrick Spencer Kehyeng Uy
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
This paper aimed to determine how the directivity was affected by the dielectric substrate in the dipole antenna. The researchers had to choose different substrates and specific property of antennas in order to produce this study. Given all these substrates, the study focused on which of these would produce the best results that would be beneficial to antennas of a certain function. For this case, it is the directivity of the antenna that is being researched on. Through the use of the Matrix Laboratory (MATLAB) software, the researchers were able to conduct a comparative study on these different substrates to obtain their directivities. After the researchers conducted the simulation, the dielectric substrate, Fused Quartz was found to have the least value in directivity while Air had the highest directivity. Additionally, the researchers were able to deduce that the lower the constant of the material, the higher the directivity of the material. This showed that the relationship between the two variables was inversely proportional.
Full text link https://tinyurl.com/puarknac
Article title: Frequency Response, Root Locus and Sensitivity Analysis
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
There are three main topics to be discussed in this paper, namely Frequency Response Analysis, Root Locus Analysis and Design, and Sensitivity Analysis. Under Frequency Response Analysis some of the sub-topics are about Frequency Response Concepts, Magnitude, and Phase Spectra, Bode Plots, Sketching the Magnitude and Phase Spectra, Controller Synthesis Using Frequency Response Method, Nyquist Diagrams, and Nichols Charts. Under the topic of Root Locus Analysis and Design is the sub-topics Root Locus Concepts as well as its Sketching, Controller Synthesis Using Root Locus, and Analog Circuit Implementations of P, PD, PI, PID, Lag, Lead, and Lag-Lead Compensators. Lastly, for the topic of Sensitivity Analysis, the sub-topics are Sensitivity to Changes in a Parameter and Sensitivity to Disturbance Signals.
Full text link https://tinyurl.com/4yzbkycb
Article title: PCB/Microstrip Antenna Design and Simulation
Authors: Aaron Don M. Africa, Francis Xavier Asuncion, Raymund Miguel Francisco A. Munchua, Janos Lance Tiberio, Joshua Vincent Ligayo, Raine Mattheus Manuel
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
The paper will give insights on the different types of printed circuit board (PCB) antennas. The study will also explain why the PCB antenna is continuously being developed. The paper will also explain how PCB antennas work. This research aims to create and simulate a working Printed circuit board antenna design. The study will be implemented using MATLAB and its toolboxes. The simulation will focus on the practicality of a PCB antenna and will show how it functions. The design of the PCB antenna will show the basic implementation of a smartphone antenna. The data that will be gathered will show how a smartphone antenna works in the real world. Through the data and results presented in the paper, the concept of how the signal transmission works within smartphones and how data is being sent and received will be explained. The study will give insights on how to improve upon current PCB antennas and what factors should be worked on to make more accurate, efficient and cost-efficient.
Full text link https://tinyurl.com/3yymh3jx
Article title: Digital Control Systems Functions and Applications
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
This paper is an evaluation of Digital Control Systems and aims to introduce the past and current developments about these kinds of systems. The focus of this research is in the field of electronics and communications engineering. Digital Control Systems are becoming the standard in most control systems being developed. This research will provide an in-depth view of the development of digital control systems.
Full text link https://tinyurl.com/4jvb77nh
Article title: Linear System Interconnections, Steady-State Analysis and Stability Theory
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
There are three main topics to be discussed in this paper, the first topic is about Linear System Interconnections. Some of the sub-topics under this topic are Series Systems, Parallel Systems, Feedback Systems, Feedforward Systems, Block Diagram Representation of Systems, Signal Flow Graph Representation of Systems, and Bond Graphs. The second topic is about Steady-State Analysis and under this topic are three sub-topics, namely, The Final Value Theorem, Static Error Constants, and Steady-State Error Due to Noise. The last topic is on Stability Theory and some of the sub-topics are the Concept of Stability and the Necessary Conditions for Stability. This paper aims to provide the definitions and explanations for the principle of steady-state analysis and stability theory. Furthermore, this study discusses the function of each and its relationship with linear systems and other types of systems.
Full text link https://tinyurl.com/43usveft
Article title: A Comprehensive Study on Application Development Software Systems
Authors: Aaron Don M. Africa, Gerard Ching, Kerwin Go, Rency Evidente, Jason Uy
Publication title: International Journal of Emerging Trends in Engineering Research 7(8), August 2019
Abstract
The research will discuss the topic of computer software, more specifically the development of applications using offline and online software. The paper will select two sample software as its main topics of discussion, namely Android Studio and MIT’s Application Inventor. The paper will also discuss how these applications developing software are used, and how one can optimize his/her experience creating apps with the given software. MIT Application Inventor was chosen because of its user-friendly interface which allows the user to focus on learning the logic of Java. Android Studio is a practical application development program to learn because of the ubiquity of Android operating systems on mobile devices.
Full text link https://tinyurl.com/6e2j3ksu
Article title: Mobile Phone Graphical User Interface (GUI) for Appliance Remote Control: An SMS-based Electronic Appliance Monitoring and Control System
Authors: Aaron Don M. Africa, Charmaine Rose S. Alcantara, Marc Erwin O. Lagula, Adolfo A. Latina, Jr., and Charmaine D. Te
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(3), June 2019
Abstract
The home monitoring system is an effective way to prevent many household accidents that may occur whether we are aware or not. There are a lot of home control devices which were developed in the past. Take fire hazards for example, there are a lot of ways for a house fire to occur like overheating appliances. Fire imposes a big hazard in our homes but there is a device that was built to lessen the probability of this from occurring or at least lessen the damage done. The fire alarm works whenever there is enough smoke that goes in the detector. It will automatically make a sound to alarm the people inside the house, some home systems have a built-in sprinkler that work when the fire alarm activates preventing further property destruction. There are a lot of ways of designing a home control system but at these times, the design must be adaptable and adaptive to most people. Global System for Mobile Communication (GSM) is a means of wireless communication between people. It can also be used to communicate with devices such that it functions even if a user is not physically present in the vicinity of the device. GSM is the most adaptable medium since it has a further range of communication compared to Bluetooth and infrared. Moreover, it is also more accessible than Wi-Fi since it is more widely available. A home monitoring system interfaced with GSM poses a great advantage and convenience to the public. The user can be updated regarding the status (ON or OFF) of his appliances which can prevent future damage. It will also be able to alarm the user of any irregular activities of the appliances immediately even if the user is at another place.
Full text link https://tinyurl.com/bef4bb6
Article title: A Comprehensive Study of the Functions and Operations of Control Systems
Authors: Aaron Don M. Africa, Patrick Bernard T. Arevalo, Arsenic S. Publico, Mharela Angela A. Tan
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(3), June 2019
Abstract
A control system is used to achieve the required feedback by controlling the output. Control systems are widely used in everyday devices such as traffic lights and cars or even processes. These systems help in further understanding and improving the process that is being utilized. It also represents the process in a much more straightforward manner that makes it easier to comprehend. This paper aims to broaden the insight on control systems and to discuss different control systems that are being used.
Full text link https://tinyurl.com/4tr4n32j
Article title: Development of a Cost-Efficient Waste bin Management System with Mobile Monitoring and Tracking
Authors: Aaron Don M. Africa, Charleston Franklin C. Uy
Publication title: International Journal of Advanced Trends in Computer Science and Engineering 8(3), June 2019
Abstract
The Internet of Things, commonly known as IOT, is an ever-evolving technology which gives solutions that makes each aspect of everyday human life easier. Creating a smart waste management is one implementation that improves the sanitation and collection of waste. This paper aims in developing a waste management system that is cost-efficient and providing a mobile application to monitor and track the waste level. By making use of inexpensive sensors, microprocessors, the group was able to create a cheaper waste management system. Using firebase database and android studio, the group was able to create a mobile application that provide a graphical user interface (GUI) which serves as a visual presentation of the waste level as well as provide a notification when the waste reaches a certain amount of level. The main advantage of the prototype is its deployment since building it is not expensive and therefore able to be mass produced at a low cost
Full text link https://tinyurl.com/3byrucj7
Article title: ECG Print-out Features Extraction Using Spatial-Oriented Image Processing Techniques
Authors: Pocholo James M. Loresco and Aaron Don Africa, Ph.D
Publication title: Journal of Telecommunication, Electronic and Computer Engineering 10(1-5), April 2018
Abstract
Analyzing cardiovascular activity of patients using ECG clinical paper printouts requires prior knowledge and practice. This research used spatial-oriented image processing methods for analyzing ECG readings by retrieving only the essential features, and not all ECG data, to assist physicians in diagnosis. Different values such as Atrial (rate/min) and Ventricular (rate/min), QRS interval (sec), QT interval (sec), QTc (sec), and PR interval (sec) were successfully extracted with indication as to whether the values are within the accepted normal values, given the patient's gender and age. Performance of the system was tested based on accuracy, RMSE and normalized RMSE. The methodology achieved average accuracy as high as 95.424 % while the PR interval feature extraction achieved a relatively low average accuracy of 87.196%.
Full text link https://tinyurl.com/33yrj7nz
Article title: Development of a urine strip analyzer using artificial neural network using an android phone
Authors: Aaron Don M. Africa and Jessica S. Velasco
Publication title: ARPN Journal of Engineering and Applied Sciences, 12(6), March 2017
Abstract
Point of Care Testing (POCT) improves clinical process outcome. It has the potential to reduce errors and the wastage of resources. There is a significant amount of information obtained through the examination of urine. The routine urinalysis consists of two major components: physiochemical determination and microscopic examination of urine sediment. The physiochemical determination includes the appearance, specific gravity and reagent strip measurements. The physiochemical properties of urine may include the following analytes: pH, protein, glucose, ketone, blood, biliburin, urobilinogen, nitrite, leukocytes and specific gravity. Reagent strips provide a simple, rapid means for performing medically significant chemical analysis for urine. Assessment of the dipstick test result is done manually by visually comparing the reactive color of each reagent with dipstick color chart based on the color similarities. The manual interpretation has its weaknesses or failure. It includes the differences in a perception of color, differences in lighting condition and a failure to read several reagents in a specified time. The study of artificial neural networks is motivated by its similarity to work with biological systems successfully. It can learn from training samples or by means of neural network capable to learn. After successful training, a neural network can find reasonable solutions for similar problems of the same class that were not explicitly trained. This in turn results in a high degree of fault tolerance against noisy input data. The study developed a urine analyzer in android environment. It is able to read a 4 parameter and 10 parameter urine strip in real-time. This study also used digital image processing that includes cropping, image segmentation, thresholding, smoothing and recognition. The training is different for each parameter. This is done through Levenberg Marquardt. It performed evaluation through comparison of the standard urinalysis and the device. The prototype is evaluated and certified by a professional registered medical technologist. The accuracy test performed proved to have an accuracy of 96%. © 2006-2017 Asian Research Publishing Network (ARPN). All rights reserved.
Full text link https://tinyurl.com/pd8e9c5x
Article title: A rough set based data model for breast cancer mammographic mass diagnostics
Authors: Aaron Don M. Africa and Melvin K. Cabatuan
Publication title: International Journal of Biomedical Engineering and Technology (IJBET) 18(4) 2015
Abstract
Breast cancer is the principal cause of cancer deaths among women, and early diagnosis is critical to its survival. Mammography is the recommended diagnostic procedure for ages 40 years and older. However, the low precision rate of mammographic result leads to needless biopsies. Thus, in this paper, we present the application of rough set theory in the development of a data model to aid in physician's recommendation for biopsy. In particular, we will utilise the data obtained at the Institute of Radiology of the University Erlangen-Nuremberg between 2003 and 2006. The results showed that the rough set approach successfully reduced the dimensionality of the aforementioned data set by approximately 47%, and the outcome rules were validated using empirical testing at 100%.
Full text link https://tinyurl.com/5rjf9wee