
Aimrun WayayokUniversiti Putra Malaysia | UPM · Department of Biological and Agricultural Engineering
Aimrun Wayayok
Doctor of Philosophy
About
199
Publications
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2,600
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Introduction
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March 2012 - present
Publications
Publications (199)
This paper presents an evaluation of Long Short-Term Memory (LSTM) models with integrated temporal-spatial attention mechanisms for prediction dengue fever in Malaysia. The performance of the models was assessed using Root Mean Square Error (RMSE) as the evaluation metric and compared with other LSTM variations and benchmark methods. The results in...
In this work, Nanocellulose (NC) reinforced geopolymer foams are prepared in a low molarity potassium hydroxide (KOH) solution between 0.32M and 1.62M. Response Surface Methodology (RSM) is used to design experiments and optimise the compressive strength of the resulting geopolymer foam. The factors studied are seawater/potassium silicate (SW/KSil)...
The aim of this study was to determine the effect of potassium, boron and zinc rates on the growth of kenaf. Seeds of two kenaf varieties namely; FHH 925 and 4383 variety were planted on 26 September 2013. Plant growth was determined for both varieties. The growth characteristics which consist of plant height, stem diameter and leaf number were mea...
One of the major problems of adapting the System of Rice Intensification (SRI) techniques is knowledge shortfall on the technical skills for processing quality seeds to achieve uniform seedling establishment in the nursery and quick seedling recovery in the puddled field. Therefore, this study aimed to create suitably seed sorting technique leading...
The aim of this study is to optimize the composition of geopolymer foam that leads to the highest water absorption. This study utilized Response Surface Methodology (RSM) to analyze the relationship between factors Seawater/Potassium Silicate (SW/KSil), Potassium Hydroxide/Potassium Chloride (KOH/KCl), Sodium Lauryl Ether Sulfate/Benzalkonium Chlor...
This research proposes a ‘temporal attention’ addition for long-short term memory (LSTM) models for dengue prediction. The number of monthly dengue cases was collected for each of five Malaysian states i.e. Selangor, Kelantan, Johor, Pulau Pinang, and Melaka from 2011 to 2016. Climatic, demographic, geographic and temporal attributes were used as c...
This research aims to predict dengue fever cases in Malaysia using machine learning techniques. A dataset consisting of weekly dengue cases at the state level in Malaysia from 2010 to 2016 was obtained from the Malaysia Open Data website and includes variables such as climate, geography, and demographics. Six different long short-term memory (LSTM)...
Land use and land cover changes driven by urban sprawl has accelerated the degradation
of ecosystem services in metropolitan settlements. However, most optimisation techniques do not
consider the dynamic effect of urban sprawl on the spatial criteria on which decisions are based.
In addition, integrating the current simulation approach with land us...
This research uses the Python language to model the Gaussian Plume equation in Quantum Geographic Information System (QGIS) to estimate the contaminants released from the cement plant. Spline interpolation and the maximum likelihood (ML) classification process are used to extract wind speeds and land cover classes. The primary and secondary directi...
Researchers are interested in developing techniques to monitor, manage and predict
the risks of gases and particles emitted from cement factories, which have a direct and negative impact on human health. Deep learning (DL) is a critical component of data mining, which further involves statistics and prediction. In this study, we developed a deep le...
Microgreens have been chosen as a sustainable dietary staple food due to their high nutritional value and short harvesting time. However, researchers about the actual comparison of the nutritional value between microgreens and their respective adult vegetables is still missing. Furthermore, in a hydroponic system, chitosan nanoparticles (CNPs) can...
Climate change, population growth and urban sprawl have put a strain on water supplies across the world, making it difficult to meet water demand, especially in city regions where more than half of the world's population now reside. Due to the complex urban fabric, conventional techniques should be developed to diagnose water shortage risk (WSR) by...
Bacterial leaf blight (BLB), bacterial panicle blight (BPB), and stem borer (SB) are serious infestations to the rice crop. Detection is the first essential step for effective management. The objective of the study is to provide a fast and accurate tool in detecting the infestation damages through Unmanned Aerial Vehicle (UAV) aerial imagery. Syste...
Foliar feeding has been growing in popularity and has been used to supplement the soil-based fertilizer applications to enhance the growth and yield of crops. However, spraying a high concentration of foliar fertilizer can cause a leaf burn effect while a low concentration of fertilizer application can show symptoms of nutrient deficiencies on the...
This study explored various research conducted on the impact of climate change, land use, and cover change (LULC) on Malaysia's availability of water resources. The country has abundant surface water reservoirs with adequate annual rainfall, which has been projected to be higher in the future. However, climate change and LULC have been global issue...
This study explored various research conducted on the impact of climate change, land use, and cover change (LULC) on Malaysia's availability of water resources. The country has abundant surface water reservoirs with adequate annual rainfall, which has been projected to be higher in the future. However, climate change and LULC have been global issue...
Timely and reliable mapping of individual date palm trees is essential for their monitoring, health and risk assessment, pest control, and sustainable management of the date palm industry. This study presents an instance segmentation framework for large-scale detection and mapping of date palm trees using unmanned aerial vehicle (UAV)-based images....
This unique book focuses on environmental degradation in Asian countries including land degradation and soil erosion. The land degradation covers assessing environmental degradation using geospatial technology, land use land cover mapping, environmental and anthropogenic degradation, assessment of land degradation vulnerability, evaluation of the i...
Although the degradation of Iraqi water sources has been a persistent problem for decades, it has become a full-blown crisis since a few years ago. The water levels in both rivers, Euphrates and Tigris, have declined by 60%. This paper aims to detect and monitor the hydrological systems of Mesopotamia marsh in Dhi-Qar province, located in the south...
Geopolymer Foam Concrete (GFC) is an emerging concrete with environmentally friendly properties but excellent strength. Currently, research is ongoing in producing GFC with low densities for its lightweight, subsidized handling and transportation cost. However, they are often fabricated with high molarity alkaline solution. In addition to that, stu...
Cement is widely used for building construction and infrastructural purposes. In the last thirteen years, this productâs global annual production has increased by 78 percent, to 4,200 Mtpa. However, cement factories have been found to be harmful to air quality, plantations, and houses. Dust emission occurs through all the stages of cement product...
Appropriate kenaf variety for a specific sowing date is still challenging in Erbil. This study aimed to determine the response of kenaf (Hibiscus cannabinus L.) varieties to sowing dates in Erbil, Kurdistan Region. Seeds of two kenaf varieties FH 952 and HC2, (V1 and V2) were selected and planted on two sowing dates: 14th April 2021 and 14th June 2...
Globally, urbanisation has been the most significant factor causing land use and land cover changes due to accelerated population growth and limited governmental regulation. Urban communities worldwide, particularly in Iraq, are on the frontline for dealing with threats associated with environmental degradation, climate change and social inequality...
Sustainable development on a global scale has been hindered by urbanization and water scarcity, but the greatest threat is from decision-makers ignoring these challenges, particularly in developing countries. In addition, urbanization is spreading at an alarming rate across the globe, affecting the environment and society in profound ways. This stu...
Multi-objective optimization models with an index were developed based on farmers’ preferences, local requirements, supplies available at the head of the canal, system losses, crop demand about different growth stages, and field soil moisture balance. The models were applied using linear programming. The Model 1 determines the cropping pattern by m...
Highlights
Clay and clay combined with zeolite was utilized for the production of clay pipes for subsurface micro-irrigation.
Various modelling approaches are mathematically complex and require computational and technical skills, hence the need for other simpler approaches.
Non-contact imaging and supervised classification (ArcGIS) techniques are u...
Synthetic-aperture radar’s (SAR’s) capacity to resolve the cloud cover concerns encountered while gathering optical data has tremendous potential for soil moisture data retrieval using SAR data. It is possible to use SAR data to recover soil moisture because the backscatter coefficient is sensitive to both soil and vegetation by penetrating through...
This paper reviewed the weed problems in agriculture and how remote sensing techniques can detect weeds in rice fields. The comparison of weed detection between traditional practices and automated detection using remote sensing platforms is discussed. The ideal stage for controlling weeds in rice fields was highlighted, and the types of weeds usual...
Basal stem rot (BSR) disease of oil palm (Elaeis guineensis Jacq.) spreads through the contact of the plant roots with Ganoderma boninense (G. boninense) Pat. inoculum in the soil. The soil properties can be altered by growing seedlings with or without G. boninense inoculum. In the early stage of infection, the symptoms are difficult to detect. The...
PV-TEG PV–TEG hybrid system is widely discussed nowadays, as an alternative way to maximize solar radiation energy which is from both of its light and heat. In recent years, the idea of using thermoelectric generators (TEGs) to extract energy from heat waste has increased with applications varying from milliwatts to kilowatts. To form a circuit, nu...
5G technology is vital for the development of Internet of Things (IoT) application in Malaysia to enhance the development of the agriculture and plantation industry. The nation is marching towards big data and artificial intelligence. Consequently, having 5G networks merging with IoT technology as a platform would contribute to the country’s gross...
In oil palm crop, soil fertility is less important than the physical soil characteristics. It is important to have a balance and sufficient soil moisture to sustain high yields in oil palm plantations. However, conventional methods of soil moisture determination are laborious and time-consuming with limited coverage and accuracy. In this research,...
Rainfall erosivity is one of the main factors of soil erosion that is expected to change as climate variables alter and impact soil conservation policies significantly. It is important to understand the potential trends in rainfall erosivity and its impacts on the environment, especially in tropical areas where severe rainfall is expected to contin...
Unlike other micro-irrigation facilities like a drip, trickle, and sprinklers that emits water at regularly spaced intervals with predefined discharges, porous rubber pipes (soaker hose) has openings of variable sizes that become unevenly spaced with uneven distribution. The latter makes discharge to be variant along its lateral. Shorter sections a...
In this study the operational speed of screw based pick and place mechanism was compared with that of a crank-rocker based pick and place mechanism analytically for the design of a seeding machine for system of rice intensification (SRI) seedling tray. The configurations of the two types of mechanisms were generated based on their positions relativ...
In this study the operational speed of screw based pick and place mechanism was compared with that of a crank-rocker based pick and place mechanism analytically for the design of a seeding machine for system of rice intensification (SRI) seedling tray. The configurations of the two types of mechanisms were generated based on their positions relativ...
The uses of clay pipes in irrigation water management are becoming popular, especially in arid and semi-arid soils. The study examined clay and zeolite materials for irrigation pipes, and this paper reported characteristic properties of these materials. Hydrometer, pychnometer and core sampler methods were for soil physical properties determination...
This work describes the effect of different agricultural land use on potential soil erodibility (K) at cultivated farming areas in Cameron Highlands. Ordinarily, soils are assigned with K factors depending on geological properties only which can result into erroneous calculation of soil erosion. This study explores roles of different agricultural l...
Malaysia receives a lot of water from its two main monsoon periods. Generally, there is a lot of precipitation throughout the year, with drought periods lasting less than three months. To date, irrigation has been treated homogenously, even though soil properties can vary spatially over a field, requiring site-specific applications. The aim of this...
Large-scale mapping of date palm trees is vital for their consistent monitoring and sustainable management, considering their substantial commercial, environmental, and cultural value. This study presents an automatic approach for the large-scale mapping of date palm trees from very-high-spatial-resolution (VHSR) unmanned aerial vehicle (UAV) datas...
Agricultural drought is crucial in understanding the relationship to crop production functions which can be monitored using satellite remote sensors. The aim of this research is to combine temperature vegetation dryness index (TVDI) and normalized difference water index (NDWI) classifications for identifying drought areas in Chuping, Malaysia which...
Global food demand has increased in tandem with the world’s growing population, prompting calls for a new sustainable agricultural method. The scarcity of fertile soil and the world’s agricultural land have also become major concerns. Soilless and microgreen farming combined with nanotechnology may provide a revolutionary solution as well as a more...
The yield of lowland rice is prone to climatic factors and farming practices, among which water management and weed control are crucial. Crop simulation models can help evaluating the impacts of these factors and practices on yield growth. This study assessed the impacts of climate, irrigation practices, and weed control measures on the yield of lo...
The right decision is needed before the irrigation project starts because it is risky, costly and required a site specific approach. The study aims to estimate oil palm irrigation water demand by using FAO-CROPWAT model. Study was conducted in Chuping Region, Northern Peninsular of Malaysia. Four points were selected to represent North, East, West...
Insect detection and counting constitute a considerable challenge in the field of agriculture. However, among various biotic issues of agricultural production, pest infestation is a major challenge, with the humid environment surrounding the crops encouraging the survival and proliferation of pests. In addition, electronic traps need protection, es...
Precipitation is sensitive to increasing greenhouse gas emission which has a significant impact on environmental sustainability. Rapid change of climate variables is often result into large variation in rainfall characteristics which trigger other forms of hazards such as floods, erosion, and landslides. This study employed multi-model ensembled ge...
Acid Mine Drainage (AMD) occurs as a result of mining activities during mineral exploration. Interaction of the minerals in the presence of atmospheric oxygen and water produces AMD as an end product. AMD can also be produced by weathering of sulphide minerals through series of process, which includes oxidation and hydrolysis. The main aim of the s...
Water-saving technologies have been gaining interest as a way of saving water while minimizing crop production losses. This
study aims to introduce a new technique for reducing the vertical infiltration rate through clay and sandy loam soil surfaces by using soil
compaction and oil-based liquid (palm oil) treatment. A two-factorial experiment of a...
Soil erosion is a serious environmental challenge which persistently diminishes available land resources globally.The impact of soil erosion is more severeat hilly regions where various techniques are deployed to evaluateits risk levels. However, the traditional approach of estimating the magnitude of erosion is tedious, costly, and considerably ti...
Hydroponic commonly incorporates crops farming with less usage of chemical fertilisers and soil utilisation. The existing hydroponic systems can only show essential parameters such as humidity, water level, nutrients and light intensity. Nutrient Film Technique (NFT) system with portable monitoring device, S shaped UPVC pipe, wood, net protection,...
Spatial variability map of the soil properties is highly dependent on availability of data either in detailed or semi-detailed resolution. Variation on the data resolution affects the interpolation technique, thus the zonal management zone. However, there are many interpolation techniques offers, thus raises the issues of the most suitable method i...
Rice diseases have caused great economic losses to farmers in rice cultivation. The current assessment of rice disease evaluation still relies on manual, subjective, and laborious techniques. The manual and subjective evaluations lead to uncertainties since some diseases have almost similar characterisation. The applications of immunological, molec...
Assessment of soil water balance is essential to understand water dynamics for optimal use of water and fertilizers. The study intended to simulate soil water dynamics in sweet corn production under tropical rainfed conditions. Surface runoff, subsurface leaching, and evapotranspiration are the main components of water balance, especially in tropic...
Currently, unmanned aerial vehicles (UAVs) are widely used to ease agricultural activities and has been progressed with recent technology development to perform aerial spraying in the rice cultivation. In fact, UAV aerial spraying ability is not just limited to crop protection but it can be extended for crop fertilization activities. However, off-t...
The slope failure risk assessment of a particular area can be prepared by considering the data available. Many attempts have been made to classify the risk where evaluations are made in rating or in grading the slopes based on their characteristics and erosion problems. The assessments were done for geo-hazard such as erosion and landslide recogniz...
For many years, lands in Cameron Highland have been opened and leveled for agricultural farming and intensive crop production. Land-disturbing activities such as agricultural operations that are conducted on regions with steep slopes leads to a high potential of soil erosion, sedimentation and landslide occurrences. As a results, this phenomenon pr...
This work was conducted at hilly farms of Cameron Highlands to model the incidences of soil erosion and landslides using historical data and field observations. IfSAR data with spatial resolution of 5 m was used which enable clear observation and delineation of the geographic features within the study area. Field visits were conducted to various pl...
Rainfall depth duration frequency (DDF) curves are used extensively in many engineering designs. However, due to the sampling error and the uncertainty associated with the parameter estimation process, the DDF curves are subjected to parameter uncertainty. In this study, an evaluation of the uncertainty of the DDF curves in the Kelantan river basin...