Yuzairi Abdul Rahim
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Preferred name
Yuzairi Abdul Rahim
Official Name
Yuzairi, Abdul Rahim
Alternative Name
Rahim, Y. A.
Rahim, Y. Abdul
Abdul Rahim, Y.
Main Affiliation
Scopus Author ID
57201860639
Researcher ID
EJY-7689-2022

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  • Publication
    A Review on the efficiency and accuracy of localization of moisture distributions sensing in agricultural silos
    ( 2019-12-03)
    Almaleeh A.A.
    ;
    Ammar Zakaria
    ;
    Zakaria S.M.M.S.
    ;
    Latifah Munirah Kamarudin
    ;
    Mohd Hafiz Fazalul Rahiman
    ;
    Sukor A.S.A.
    ;
    Yuzairi Abdul Rahim
    ;
    Abdul Hamid Adom
    The moisture distribution in the silos depends upon various seeds parameters such as type and size of seeds, amount of storage, external weather, and storage period as well as structural and environmental factors. It is very difficult to predict moisture distribution in silos effectively while taking all the above aspects into consideration. This study aims to investigate the efficiency and accuracy of localization of moisture distributions sensing in agricultural silo. The work is mainly focussed on three major elements: Radio Frequency (RF), tomographic imaging and classification process using machine learning. In particular, RF-based signal and volume tomographic images are used to predict the moisture distribution. Furthermore, computational intelligence techniques such as artificial neural network (ANN) is applied to develop models based on previous data. The generalization of these models towards new set of data is discussed in making sure a successful application of a model. A detailed study of the relative performance of computational intelligence techniques has been carried out based on different statistical performance criteria.
      2  30
  • Publication
    Case study of LoRaWAN-based smart elements in urban environment
    ( 2024-02-08)
    Syed Muhammad Mamduh Syed Zakaria
    ;
    Ammar Zakaria
    ;
    Latifah Munirah Kamarudin
    ;
    Visvanathan, Retnam
    ;
    Yuzairi Abdul Rahim
    ;
    Azmi, Noraini
    ;
    Elham M.F.
    Communication is one of the enablers for smart elements in a smart city. The ability of these smart elements to communicate with each other enables them to react intelligently to dynamically changing conditions. Most communication radios like Zigbee, BLE, and WiFi, among others, are short-ranged and while others such as 3G and 4G LTE, are power-hungry and subscription-based. While these protocols and communication modes work for certain applications, it carries two main limitations; difficulties in deploying IoT solutions in areas without cellular (GPRS, EDGE, 3G, LTE/4G) coverage and reduction in battery life. Thus, the future implementation of IoT and the connection of all kinds of "things"located in all kinds of places, needs a communication medium tailor-made for IoT which is low power, significantly long range, cheap, secure, and easy to deploy. This work presents the results of LoRaWAN coverage tests in Selangor Cyber Valley which is a greenfield development area where smart systems are designed into the blueprint. The data collected are during the early development phase with minimal buildings and foliage. The data demonstrates that the LoRaWAN covers a maximum radius of 2.49 km reliably with less than 10% packet loss. This strongly suggests that LoRaWAN is a reliable connection protocol for outdoor end-devices in urban environments. Future data collection after further developments may demonstrate the impact of buildings and foliage in urban environments on LoRaWAN.
      1  15
  • Publication
    Design and deployment of LoRaWAN smart streetlight for smart city
    ( 2024-02-08)
    Syed Muhammad Mamduh Syed Zakaria
    ;
    Ammar Zakaria
    ;
    Latifah Munirah Kamarudin
    ;
    Visvanathan Retnam
    ;
    Yuzairi Abdul Rahim
    ;
    Kamarulzaman Kamarudin
    ;
    Noraini Azmi
    ;
    Nurul Safirah Mohammad
    Streetlights are one of the major contributors of a city's energy usage, creating a large carbon footprint especially for highly populated areas. Current streetlights are turned on and off based on fixed schedule or by light sensors. Previous works have suggested the dimming of streetlights during zero traffic conditions to reduce energy consumption. This requires a reliable and economical communication backbone to ensure minimal service disruption. This work presents the design and performance evaluation of LoRa-based smart streetlight controllers in an urban environment. The deployment was designed to provide stress test, simulate communication connectivity, maintenance routine, firmware test and environmental conditions. The setup may also be used for staff training purposes and demonstration. The results of this work may be used achieve the effective control method for power saving, system stability, robustness and long-term performance. The deployed system includes test controllers, nodes, application server, database, gateway server and visualization dashboard. The system design demonstrated low packet error rates of approximately 1% and command response time of less than 3s in real world conditions.
      1  33