R Badlishah Ahmad
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Preferred name
R Badlishah Ahmad
Official Name
R Badlishah, Ahmad
Alternative Name
Ahmad, R. Badlishah
Ahmad, B.
Badlishah Ahmad, R.
Ahmad, Rashidi
Ahmad, Badlisha
Ahmed, R. Badlishah
Ahmad, R. B.
Badlishah, R.
Ahmad, R. Badli
Ahmed, Rbadlishah
Main Affiliation
Scopus Author ID
57194844651
Researcher ID
U-3211-2019

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  • Publication
    Chemical composition of rainwater harvested in East Malaysia
    ( 2022-04-01)
    Abdullah S.N.F.
    ;
    Ismail A.
    ;
    Juahir H.
    ;
    R Badlishah Ahmad
    ;
    Lananan F.
    ;
    Hashim N.M.
    ;
    Ariffin N.
    ;
    Zali M.A.
    ;
    Mohd T.A.T.
    ;
    Hussin M.H.F.
    ;
    Mahmood R.I.S.R.
    ;
    Jamil J.R.A.
    ;
    Desa S.M.
    As part of the implementation of a rainwater harvesting system as an alternative water source supply for non-potable use, therefore the characteristic of chemical compounds was significantly explored. The Department of Chemistry, Malaysia, gave the data set for three years (2017-2019). Some chemometric techniques, including PCA, were performed to identify the dimensionality of the rainwater data, hence establishing the rainfall index's purity to determine the quality of rainwater in the study area. Discriminant analysis managed to differentiate each rain gauge station. Cluster analysis was then applied to perform smaller group of rain gauge stations. The result demonstrates that sea salt, secondary aerosols, trace metals, crustal origin, and organic acid dominated the dimensionality of rainwater data with a total variance of 53.38% and indicated that the PRI was significantly diversified into good purity of rainfall index (GPRI), (Labuan and Danum Valley), moderate purity of rainfall index (MPRI), (Kuching and Tawau) and bad purity of rainfall index (BPRI), (Kota Kinabalu and Bintulu). From the study, it can be stipulated that the chemical composition of rainwater in the study area was attributable to the local activities.
  • Publication
    Cryptanalysis cipher text using new modeling: Text encryption using elliptic curve cryptography
    ( 2020-01-08)
    Naji M.A.
    ;
    Hammood D.A.
    ;
    Atee H.A.
    ;
    Jebur R.S.
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    R Badlishah Ahmad
    Cryptanalysis is the investigation of cipher content, ciphers and cryptosystems with the point of seeing how they work and finding and improving procedures for crushing or debilitating. Elliptic Curve Cryptography is one of the newest fields in cryptography field. This paper has proposed a new technique where classical techniques are replaced with new technique by changing characters with affine points. This technique avoids costly mapping.
  • Publication
    Hybrid OCDMA/WDM system using Spectral Direct Detection technique for Gigabit Passive Optical Network application
    ( 2017-01-01)
    S.M. Monirul Islam
    ;
    Nasim Ahmed
    ;
    Sharafat Ali
    ;
    Rahman M.
    ;
    Syed Alwee Aljunid Syed Junid
    ;
    R Badlishah Ahmad
    This study a hybrid Optical Code Division Multiple Access (OCDMA) over Wavelength Division Multiplexing (WDM) network is proposed to supporting large numbers of subscribers for Gigabit Passive Optical Network (GPON). Gigabit Passive Optical Network (GPON) is a developing innovation for satisfying high transfer speed interest of clients with long separation scope. In this study, the Modified Double Weight (MDW) code is used as signature address to designing the system regarding this code can accommodate huge number of simultaneously active users. The simulation model of GPON systems is derived by Spectral Direct Detection (SDD) technique which has been developed for the analysis of feasibility and implementation issues of the application. The aim was to analyse the impact of the most important parameters of the components that are needed for new network elements. On the basis of the results achieved (e.g., =10-10) the optimal of the GPON system for 20 km fibre length. Hence, this system can be considered as a promising solution for gigabit passive optical network application.
  • Publication
    Reliable data transmission: An IoT health-based paradiam
    ( 2020-11-01)
    Hammood D.A.
    ;
    Mahmoud M.S.
    ;
    Alkhayyat A.
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    R Badlishah Ahmad
    A WBAN can be spread over a person's body, so; posing, dressing, moving of muscles, degree of heat of bodies as well as weather changes in general affect connections among sensors as well as desired point. Secondly, information collected via every sensor can be connected to a person's course of life; so, it can be considered as significant to guarantee that the collected information ought to be given to desired point competently. In this work, a critical cooperating communicating protocol to WBAN established on information has been suggested, called critical Data Transmission using Transmission Mode Selection (CD-TMS) method established for the architecture of star topology. In the beginning, we performed a studying, also we established a system model can be looked at according to channel los of path, effective transmitting possibility, as well as the out of work time possibility. Thirdly, relaying selecting can be used accompanied by CD-TMS, that lets just the most successful relaying take part in cooperating in a spread manner. Simulating as well as numeral outcomes illustrate that CD-TMS has the ability to develop the performing of a network under common terms comparing with direct transmission mode (DTM) IEEE 802.15.6 CSMA as well as benchmark.
  • Publication
    Embedded system for automatic plant irrigation using raspberry-Pi (APLIRasPi)
    ( 2017-01-01)
    Mohd Ilman Jais
    ;
    Shuhaizar Daud
    ;
    Ismail I.
    ;
    Nurfatin A.S.
    ;
    R Badlishah Ahmad
    Nowadays, an irrigation system in Malaysia mainly uses an irrigation system manually. With this method, water consumption is rather wasted because each soil requires different quantities of water. Similarly, in terms of working on high energy consumption. The purpose of this research work is to upgrade it to the automatic irrigation system using a single board computer (SBC) which is Raspberry-Pi (RasPi). Thus, by upgrading the irrigation system to automatic, there are various pros and recovery can be achieved. Using an automatic irrigation system, farmers can save time and cost. Farmers are also able to control irrigation pumps automatically or by using cell phones or other electronic devices anywhere and anytime through web based. The system also uses soil moisture sensor to detect the humidity of soil. Each soil has a certain moisture level.
  • Publication
    Blockchain based Secure System for the Internet of Drones (IoD)
    ( 2022-01-01)
    Maurya S.
    ;
    Rauthan M.M.S.
    ;
    Verma R.
    ;
    R Badlishah Ahmad
    At present, drones are being used at a higher rate than ever. Frequently, they have been often used in military services. Therefore, it is the need of the hour to increase the smartness, privacy, and security of drones as they provide confidentiality and validity in the transmission of data. This research study has suggested and implemented a blockchain-based secure system for the internet of drones. It provides seamless authentication and registration for drones with better data storage security. The proposed method is evaluated on dummy drones to check the security and confidentiality of the system.
  • Publication
    A Review on Implementation of AES Algorithm Using Parallelized Architecture on FPGA Platform
    ( 2023-01-01)
    Mohammed N.Q.
    ;
    Amiza Amir
    ;
    R Badlishah Ahmad
    ;
    Salih M.H.
    ;
    Arrfou H.
    ;
    Thalji N.
    ;
    Matem R.
    ;
    Abbas J.K.K.
    ;
    Hussien Q.M.
    ;
    Abdulhassan M.M.
    High-security cryptography algorithms like AES require high computational capabilities to achieve information security. Therefore, it is necessary to use parallel computing architectures that exploit modern technologies to obtain the most conceivable computational power. Various methods have been introduced to achieve parallel processing. One of them is field-programmable gate arrays (FPGAs), which have good characteristics suitable for implementing parallel architectures with lower power consumption. This paper will focus on the most important FPGA boards that were used to implement the AES cryptographic algorithm. In addition, it demonstrates the general scheme of building architecture with multiple computing processing engines to get high performance and better throughput, which is reflected in the reduced cost and energy consumption of IoT devices.
  • Publication
    A Fuzzy-Based Angle-of-Arrival Estimation System (AES) Using Radiation Pattern Reconfigurable (RPR) Antenna and Modified Gaussian Membership Function
    ( 2019-01-01)
    Jais M.I.
    ;
    Thennarasan Sabapathy
    ;
    Muzammil Jusoh
    ;
    R Badlishah Ahmad
    ;
    Jamaluddin M.H.
    ;
    Kamarudin M.R.
    ;
    Ehkan P.
    ;
    Murukesan Loganathan L.
    ;
    Soh P.J.
    Angle-of-arrival (AOA) estimation is an important factor in various wireless sensing applications, especially localization systems. This paper proposes a new type of AOA estimation sensor node, known as AOA-estimation system (AES) where the received signal strength indication (RSSI) from multiple radiation pattern reconfigurable (RPR) antennas are used to calculate the AOA. In the proposed framework, three sets of RPR antennas have been used to provide a coverage of 15 regions of radiation patterns at different angles. The salient feature of this RPR-based AOA estimation is the use of Fuzzy Inferences System (FIS) to further enhance the number of estimation points. The introduction of a modified FIS membership function (MF) based on Gaussian function resulted in an improved 85% FIS aggregation percentage between the fuzzy input and output. This later resulted in a low AOA error (of less than 5%) and root-mean-square error (of less than 8°).
  • Publication
    Green Nanocomposite-Based Metamaterial Electromagnetic Absorbers: Potential, Current Developments and Future Perspectives
    ( 2020-01-01)
    Yah N.F.N.
    ;
    Rahim H.A.
    ;
    Soh Ping Jack
    ;
    Abdulmalek M.
    ;
    R Badlishah Ahmad
    ;
    Muzammil Jusoh
    ;
    Seng L.Y.
    ;
    Jamaluddin M.H.
    ;
    Mohd Najib Mohd Yasin
    The use of the natural materials instead of conventional materials as electromagnetic absorbers promotes environmental sustainability, cost-effectiveness, and ease of accessibility. Furthermore, these materials may also be designed as absorbers and as reinforcements in building materials in a lightweight form. The absorbing ability of composite materials can be customized based on the chosen fillers. Specifically, magnetic and dielectric fillers can be incorporated to improve the absorption of a composite material compared to traditional materials. This work aims to review recent developments of electromagnetic absorbers enabled by nanocomposites, metamaterial and metasurface-based, as well as green composite alternatives. First, the background concepts of electromagnetic wave absorption and reflection will be presented, followed by the assessment techniques in determining electromagnetic properties of absorbing materials. Next, the state-of-the-art absorbers utilizing different materials will be presented and their performances are compared. This review concludes with a special focus on the future perspective of the potential of metamaterial based nanocellulose composites as ultrathin and broadband electromagnetic absorbers.
  • Publication
    On the effectiveness of congestion control mechanisms for remote healthcare monitoring system in IoT environment - A review
    ( 2017-01-03)
    Wan Aida Nadia Wan Abdullah
    ;
    Naimah Yaakob
    ;
    R Badlishah Ahmad
    ;
    Amiza Amir
    ;
    Siti Asilah Yah
    A progressive advancement in biosensors and wireless technology are the major contributors to the realization of continuous remote health monitoring system (RHMS). Wireless Body Area Network (WBAN) is part of this technology due to the deployment of multiple sensors such as Electrocardiogram (ECG) to collect vital body signals for processing and diagnosis. Among the benefits offered by this technology include remote monitoring of patient's health status and early detection of abnormalities in the collected signals. Once detected, several preventive measurements can be taken. However, this system needs to encounter some challenges in the wireless network such as delay, packet loss and throughput due to network congestion when transmitting and receiving a bulk of multiple data. Generally, the presence of these problems in transmitting vital body signals may result in incorrect medical diagnosing which can increase mortality rate and cause severe impact to the overall system's performance. Thus, a suitable design of congestion control mechanism is urgently needed in designing a reliable and efficient remote health monitoring system.