Teaching Documents by Lean Karlo Tolentino
Papers by Lean Karlo Tolentino
International Journal of Electronics
Cornell University - arXiv, Mar 3, 2021
Computing and Information Processing Letters
The concept of image processing has been implemented and developed in various fields, including t... more The concept of image processing has been implemented and developed in various fields, including the poultry industry. The focus in development is on egg detection. Detection is not only in the concept of object detection but also in other things such as weight prediction, egg physical characteristics, to embryo detection. This staged process starts from the image acquisition process, preprocessing, segmentation up to identifying or detecting eggs. This article provides details about the concept of image processing in detecting chicken eggs based on a review of previous studies. The studies discussed the basic concepts of image processing in detecting chicken eggs and their technical application. Based on image processing’s basic concept, there are four main parts: image acquisition, preprocessing, segmentation, and identification or classification. The acquisition process is carried out with a variety of tools that can capture images to be processed. The result of the acquisition is...
Journal of Technical education and training, Dec 20, 2020
Journal of Telecommunication, Electronic and Computer Engineering, 2018
An analogue maximum power point tracking (MPPT) controller integrated circuit (IC) based on rippl... more An analogue maximum power point tracking (MPPT) controller integrated circuit (IC) based on ripple correlation control was modified for low voltage applications in this study to harvest the maximum power from the photovoltaic array or solar panel under partial shading and changes in temperature. The IC was implemented in TSMC 0.35um 2P4M 5V mixed-signal CMOS technology. It was simulated at various process corners namely: typical-typical (TT); slow-slow (SS); fast-fast (FF); slow-fast (SF); and fast-slow (FS). The simulation results showed that at a 400 W/m2 solar irradiance and 25 degrees Celsius temperature, the tracking efficiencies are 99.18%, 98.55%, 98.89%, 98.96%, and 98.90% at different process corners, TT, FF, FS, SF, and SS, respectively.
Social Science Research Network, Dec 2, 2015
Accidents are unexpected and undesirable events resulting in harm and damage. This study explored... more Accidents are unexpected and undesirable events resulting in harm and damage. This study explored the accidents that happened in San Marcelino St. and Ayala Boulevard Intersection in the span of ten years. This paper presented the frequency of accidents that occur every month and every year and analyzed which of the pedestrian and motorist is the main cause of accidents. The researchers aim to prove that both the pedestrian and motorist are equally responsible for the accidents that happened. Using the data from the Metro Manila Development Authority and Manila Traffic Bureau, this study evaluated the frequency of accidents that happens in the intersection and determined which year and month the highest number of accidents occurred. A survey was conducted to evaluate a person's awareness of the traffic rules and their behavior when in the road. The respondents, motorist and pedestrian, were chosen through Simple Random Sampling. The selected respondents filled up the necessary information and rated their awareness and behavior through a series of questions regarding road safety and traffic rules. The data gathered were analyzed using the measures of central tendency (mean, median, and mode) and Mann-Whitney U Test. The study done showed that the both the pedestrian and motorist are equally responsible for the accidents.
Calibration is one area in measurement where our country is still in the process of improvement. ... more Calibration is one area in measurement where our country is still in the process of improvement. The absence of confirmed approaches and actions for identifying the features of calibration baths by numerous laboratories disallowed them to assess more the finest measurement ability and develop their accurateness. In recent advances in technology, there is now a way of providing the best measurement capability in temperature calibration by providing validated methods in characterizing calibration baths that contributes to the uncertainty of measurement of the calibrated thermometer and is therefore important to measure the extent of its contribution to the final uncertainty. This study adapted the process from obtainable and current methods. Platinum Resistance Thermometer (PRT-Isotech) and Standard Platinum Resistance Thermometer (SPRT-Hart) which are interfaced to Precision Digital Multimeters were used for measurements. Quite a few measurements were made at varying time durations i...
2019 International SoC Design Conference (ISOCC), 2019
This paper presents a monitoring and automatic correction system for an aquaponics set-up in a te... more This paper presents a monitoring and automatic correction system for an aquaponics set-up in a temperature-controlled greenhouse using an Android device through Internet of Things (IoT). The system involves the acquiring of real time data detected by the light intensity sensor, and air temperature and humidity sensor. It also includes the monitoring of the pH level and temperature of the recirculating water of the system and the canopy area of the plant. If the acquired data is not within the threshold range, the correcting devices, namely grow lights, exhaust and inlet fans, evaporative cooler, aerator, and peristaltic buffer device were automatically triggered by the system to correct and achieve its normal status. The Internet remote access includes the effective wireless transmission and reception of data report between the system and an Android unit with the Android application in real-time.
2021 IEEE Asia Pacific Conference on Circuit and Systems (APCCAS), 2021
This paper presents a 2×VDD, PVT-insensitive (process, voltage, and temperature) output buffer th... more This paper presents a 2×VDD, PVT-insensitive (process, voltage, and temperature) output buffer that has a slew rate and duty cycle self-adjustment. It complies with the slew rate, system voltage, and duty cycle requirements for DDR4 SDRAMS. Low Vth transistors which are always turned on are selected as drivers in the output stage to prevent output current fluctuations and increase the driving current. These transistors' gates are stabilized by both driving currents and a capacitor rejecting any interference by the noise coupled from GND. The output buffer is realized using TSMC 16-nm FinFET CMOS process. The core area is $0.1412\times 0.0794\ \text{mm}^{2}$. At 2.5 GHz, it has maintained a slew rate of 6.4 and 8.7 V/ns and a duty cycle of 48.3 to 49.2% at a maximum load capacitance of 30 pF. Whether at normal voltage mode (VDD) or high voltage mode (VDDIO), the improvement in slew rate increase ($\Delta\text{SR}$ improvement) is approximately at least 20% after driving current auto-tuning.
2021 IEEE International Conference on Mobile Networks and Wireless Communications (ICMNWC), 2021
This study presents the use of a wireless data acquisition system and the power management system... more This study presents the use of a wireless data acquisition system and the power management system for the development of mooring buoys. The Data Acquisition System is a system for controlling more than one group of sensors and reporting the findings of each sensor through microcontroller. The Power Management System oversees controlling the electrical system of the buoy. The main task is to ensure the electrical system of the buoy is safe and efficient. The proposed study consists of seven sensors gathering different parameters namely: air temperature, air pressure, relative humidity, wind speed, rainfall, solar radiation, water temperature, and salinity profile. For more precise data, three (3) moored buoys are stationed one kilometer from the shore and apart each other to collect information from different areas of the deployment area. It gathers climate characteristics of different areas, which records data accurately. The construction of the device consists of a tower, a polystyrene, and a rope. Its tower has beacon light that serves as an indicator and solar panels as the primary energy source of the buoy. The buoy carries approximately 15 to 20 kilograms of load, and it sustain three (3) solar panels and a 12-V battery. This device has a long battery life and uses idle mode between continuous samples to conserve power. Sleep mode is activated if the information gathered following 15 minutes of samples are consistent, and the power starts again after an additional 15 minutes. The buoys for weather monitoring were deployed under the CGSS-CCP of the Philippine Coast Guard. The results are transmitted to the base station and analyzed by the forecasting system.
2021 IEEE International Conference on Mobile Networks and Wireless Communications (ICMNWC), 2021
Global warming is one of the characteristics of climate change; the impacts of global warming mak... more Global warming is one of the characteristics of climate change; the impacts of global warming make it more difficult to plant in an uncontrolled environment. Traditional farming methods need producers to have high-quality soil and a lot of space and water. On the other hand, the yield does not correspond to or meet the demands of the consumers. As a result, it is important to employ a farming approach that has a reduced cost factor need and to preserve and manage critical factors such as light, water level temperature, and humidity. This article discusses HyLo, a smart vertical hydroponics farming system that eliminates the need for soil. Instead of underground soil, this approach cultivates crops by exposing their roots to a combination of solutions and water in the form of vertical nutrient film technique (NFT) pipes. Vertical farming is advantageous in terms of space and plant layout, and it is also successful when used in conjunction with hydroponics. The evolution of technology in terms of automation and data transmission resulted in the evolution of smart hydroponics, since detection, correction, and monitoring of key parameters are all present. Additionally, it was combined with the LoRaWAN technology, which enables long-range, low-power data transmission over a wide area network (WAN). The number of leaves and circumference of lettuce grown in the suggested hydroponics system were compared to those grown in the traditional system. The results indicated that the suggested hydroponics arrangement produced more lettuce leaves and a larger diameter than the traditional configuration.
2018 IEEE 10th International Conference on Humanoid, Nanotechnology, Information Technology,Communication and Control, Environment and Management (HNICEM), 2018
EMG speed-controlled rehabilitation treadmill (BitAid) uses the muscle activity at lower extremit... more EMG speed-controlled rehabilitation treadmill (BitAid) uses the muscle activity at lower extremities to determine the speed of the treadmill necessary for the rehabilitation of the patient. It targets on aiding patients with lower extremity problems and neurologic cases like after-stroke. The biomedical equipment used is a plugged type BITalino Kit which can determine electrocardiogram (ECG), electrodermal activity (EDA), electromyogram (EMG) and balance using accelerometer (ACC). The data from these sensors are displayed in the tablet attached in front of the patient allowing them to see the reaction of their body during rehabilitation. A suit was designed for placing the electrodes to several points on the patient's body. The overall performance of the device has been evaluated and shown excellent ratings on its necessity, reliability, stability, user-friendliness and ease of operation.
International Journal of Computing and Digital Systems, 2022
International Journal of Computing and Digital Systems, 2021
International Journal of Computing and Digital Systems, 2021
2019 IEEE 11th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management ( HNICEM ), 2019
One of the necessities of human to survive is food and meat is one of mainly consumed food by hum... more One of the necessities of human to survive is food and meat is one of mainly consumed food by humans. Thus, a level of quality of food is a must to be safely consumed. There have been some cases of adulteration of meats, which can cause harm to consumers. Adulteration can lead to bacteria contamination which are difficult to determine the presence of bacteria without an instrument or food laboratory tests. Nowadays, the idea of applying machine learning in the field of food microbiology is becoming a trend. And one of these applications is on detection and classification of bacteria in food products. Hence, this study aims to apply machine learning algorithms to construct predictive models to detect the presence of bacteria such as Escherichia Coli and Staphylococcus Aureus in raw meat and determine which model is best through accuracy and cross-validation. In this study, five machine learning algorithms are used which are K-Nearest Neighbors (KNN), Support Vector Machine (SVM), Random Forest (RF), Naïve-Bayes Classifier (NB), and Artificial Neural Network (ANN). All models are implemented effectively each having an accuracy of 94.97%, 91.84%, 97.57%, 61.46%, and 66.84% respectively. A web application is created using the shiny package in R to attain a standalone application used to show the detected bacteria.
2019 IEEE 11th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management ( HNICEM ), 2019
The advent of large-scale renewable energy generation is driving a growing need for new electroch... more The advent of large-scale renewable energy generation is driving a growing need for new electrochemical energy storage systems. Metal-air batteries, having a promising technology that could address this need, faces challenges due to the costly and locally unavailable production of air-cathode. Thus, the proponents came up with the idea of designing portable metal-air battery with configured air-cathode layering technology using activated carbon derived from waste coffee grounds and saltwater as electrolyte. The design process involves genetic algorithm to optimize both performance and dimensions. In this study it has been proven that activated carbon derived from waste coffee grounds possess characteristics that is significant for the production of air-cathode and batteries such as microporosity and absorption property. The fabricated air-cathode improved conductivity, affordability, and promotes the passage of ambient air required for electrochemical reaction to occur. Result shows that genetic algorithm successfully optimized the dimension of the device making it portable yet with comparable performance. The device is capable of storing 285 mL of saltwater enough to power a radio for 4 hours, LED lightings for 11 hours and can fully charge mobile phones. The device has a rated output of DC 5-30V/ 2A / 10-60W, capacity of 60 Wh and optimized dimension of 130 mm x 80 mm x 172.25 mm.
TENCON 2018 - 2018 IEEE Region 10 Conference, 2018
This paper presents the development of an incubation system for autonomous temperature and humidi... more This paper presents the development of an incubation system for autonomous temperature and humidity control using Arduino microcontroller interfaced and coded using LabView programming. The proposed system also includes important functions to hatch eggs which are candling through infertile egg identification using basic image acquisition, and egg turning that employs crank-rocker mechanism and a hatching chamber. It revolves around fusing all the elements of egg incubation and turning it into one device. It functions autonomously without having to consistently check and adjust to obtain optimal parameters. By using its monitoring features, the user can have real-time data of the day-to-day status of the incubator’s parameters. The speed of its automatic candling program is 1.129 seconds while the performance of the incubator held an optimal temperature of 36º Celsius with humidity between 40% and 60% with an optimal level of 50%. Lastly, the hatch rate percentage of the incubation using the proposed system is 69.44% while the percentage accuracy result for detecting fertile eggs is 91.43%.
2018 IEEE 10th International Conference on Humanoid, Nanotechnology, Information Technology,Communication and Control, Environment and Management (HNICEM), 2018
In the age of automation where almost all household appliances are having the term “smart”, the n... more In the age of automation where almost all household appliances are having the term “smart”, the need for a secured door system together with an automated circuit breaker is indeed a must have for being in the trend. With the use of the NFC technology, entering door hassle-free without countless keys and open any door with just a tap of a single card is possible. The NFC-Controlled Door Lock also comes with an automatic circuit breaker that activates when a person entered, and it deactivates when the person exits therefore reducing power costs due to idle appliances. Moreover, 4 NFC tags/cards were tested for its detection speed and distance to determine the most suitable tag to be used. The system prototype is evaluated, and it is 100% accurate when recognizing and authorizing an NFC card. It also comes with a database that records the person who enters and exits the room which is accessible easily thru a browser-based database.
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Teaching Documents by Lean Karlo Tolentino
Papers by Lean Karlo Tolentino