Muhammad Rizal Razman

National University of Malaysia | ukm · Institute for Environment and Development (LESTARI)

Despite growing public, academic, and government awareness of the energy consumption issue, there is still little research on the scales and patterns of Household Electricity Consumption (HEC), particularly in developing countries such as Malaysia. Therefore, the present study examines the status of HEC using electricity consumption breakdowns, key...

Hybrid kenaf/glass fiber reinforced polymer composites have emerged as promising structural materials, garnering significant attention due to their unique blend of natural kenaf fibers and synthetic glass fibers. However, despite their potential, there remains a gap in the comprehensive understanding of their quasi-static mechanical behavior, creep...

This research article elaborates on the conceptual design development of a sustainable bionanocomposite bracket for bracing installation in composite cross arm structures. The product design development employed the hybrid techniques of the theory of inventive problem solving (TRIZ), morphological chart, and analytic network process (ANP) methods....

Hybrid natural/synthetic fibres reinforced composites have become prominent raw material to reduce overall weight of automobile. This happened due to its various in versatile properties such lightweight, low cost, ease in structural development, strength to weight ratio, and high mechanical properties. Due to this factors, many automotive carmakers...

Dragon fruit, also called pitaya or pitahaya, is in the family Cactaceae. It is found in two genera: 'Selenicereus' and 'Hylocereus'. The substantial growth in demand intensifies dragon fruit processing operations, and waste materials such as peels and seeds are generated in more significant quantities. The transformation of waste materials into va...

Cymbopogan citratus fibre (CCF) is an agricultural waste plant derived from a natural cel-lulosic source of fibre that can be used in various bio-material applications. This paper beneficially prepared thermoplastic cassava starch/palm wax blends incorporated with Cymbopogan citratus fibre (TCPS/PW/CCF) bio-composites at different CCF concentration...

In the fight against dengue, various strategic measures have been outlined by World Health Organization needed to be improved, including the management and diagnosis of dengue cases, integrated surveillance and emergency preparedness, sustainable vector controls, implementation of future vaccine, and basic operational research. To control the vecto...

Landslide is one of the natural disasters that commonly occurs in terrestrial environments with slopes throughout the world. Located among countries with tropical climates, the hot and humid conditions expose Kuala Lumpur, Malaysia, to the risk of landslides. This paper aims to delineate the influencing physical characteristics of landslide occurre...

Fibre-reinforced polymer (FRP) composites have been selected as an alternative to conventional wooden timber cross arms. The advantages of FRP composites include a high strengthto-weight ratio, lightweight, ease of production, as well as optimal mechanical performance. Since a non-conductive cross arm structure is exposed to constant loading for a...

Oil palm fibre (OPF) is abundant in resources since it is easily obtained in many parts of an oil palm crop. The application of OPF in polymer composite could provide good mechanical stiffness and strength, and the material is considered environmentally friendly. Research has been carried out on oil palm biocomposites to characterise the thermal, m...

Currently, there are many natural disasters such as floods, landslides, earthquakes, and climate change. These disasters certainly affect the conditions of human life from economic, social, and environmental perspectives. Therefore, it is necessary to take preventive action and learn so that people understand the potential for disasters and how to...

Landslide occurrences increase alongside the urbanization rate in developing countries. Hence, the need tovisualize the distribution pattern of increases is essential for the management of landslide cases, especiallyin Malaysia. Thus, a landslide monitoring system is proposed for landslide risk areas using computer generatedmodeling to perform spat...

Natural fibre which obtained from lignocellulosic biomass has various advantages especially in product development due to its abundance and ability in mechanical properties. Currently, sugar palm fibre (SPF) has been emerged as promising fibre reinforcement in composite industries to form as high strength and stiffness biocomposites. Currently, num...

Natural fibre which obtained from lignocellulosic biomass has various advantages especially in product development due to its abundance and ability in mechanical properties. Currently, sugar palm fibre (SPF) has been emerged as promising fibre reinforcement in composite industries to form as high strength and stiffness biocomposites. Currently, num...

The significant reduction in petroleum resources and the growth of global environmental awareness on the use of conventional plastics are the motivating factors to accept natural fibres as green materials. Lignocellulosic fibre-reinforced polymer biocomposites have attracted considerable attention from engineers and researchers because of their sus...

This paper discusses on the governmental capacity in environmental managing regency border in Indonesia which are located between the Kampar Regency and Rokan Hulu Regency. Various issues arise with regard to the environmental management of the five villages within the above mentioned area. There are many challenges in managing that particular area...

In the era of globalisation, decreasing synthetic resources, especially petroleum, have encouraged global communities to apply biomass waste as a substitute material for green technology development. The development of plastic products from lignocellulosic fibre-reinforced composites has been a hot topic among material scientists and engineers due...

Man-made composites are vastly implemented in various engineering applications, particularly in cross-arm component of latticed transmission tower. However, their practice in this sector has increased pollutant emissions and landfill areas. Thus, scientists and engineers have been driven to look for other ‘greener’ alternative materials that have l...

Biomimetics is the field of obtaining ideas from nature that can be applied in science, engineering, and medicine. The usefulness of cellulose nanocrystals (CNC) and their excellent characteristics in biomimetic applications are exciting and promising areas of present and future research. CNCs are bio-based nanostructured material that can be isola...

Ever since the introduction of 3D printing, industries have seen an exponential growth in production and efficiency. Three-dimensional printing is the process of additive manufacturing (AM) in which the conventional method of material removal is challenged. Layer-on-layer deposition is the basic principle of the AM. Additive manufacturing technolog...

The reinforcement of natural fibre and fillers in polymer resin is the latest trend followed by research groups and industries for the development of sustainable composites. Basalt fibre and waste marble powder are naturally occurring substances used to enhanced polymer properties. The present research examined the effect of both basalt fibre and w...

In recent years, serious reduction in petroleum resources and concerns about the usage of synthetic plastics have prompted global communities to accept the use of natural fibres and biopolymers in many products. Lignocellulosic fibre polymer biocomposites have attracted the attention of scientists and engineers because of their wide availability, l...

New product development review article aims to consolidate the principles and current literature on design for sustainability to seek the field’s future direction. In this point of view, the design for sustainability methods can be established under the idea of sustainability in dimensions of ecology, economy and social pillars. Design for sustaina...

There has been much effort to provide eco-friendly and biodegradable materials for the next generation of composite products owing to global environmental concerns and increased awareness of renewable green resources. This review article uniquely highlights the use of green composites from natural fiber, particularly with regard to the development...

This manuscript reviews previous literature on filament-wound polymer composites and their potential applications as cross arm structures in latticed transmission towers. The current trends of cross arms implement pultruded glass fibre-reinforced polymer composites without any additional configurations. However, extreme tropical climate and dynamic...

Fruits and vegetables are important components of a healthy diet. They are rich sources of vitamins and minerals, dietary fibre and a host of beneficial non-nutrient substances including plant sterols, flavonoids and other antioxidants. It has been reported that reduced intake of fruits and vegetables may increase the risk of non-communicable disea...

Biocomposites are materials that are easy to manufacture and environmentally friendly. Sugar palm fibre (SPF) is considered to be an emerging reinforcement candidate that could provide improved mechanical stiffness and strength to the biocomposites. Numerous studies have been recently conducted on sugar palm biocomposites to evaluate their physical...

Global Citizenship (GC) is still a new concept in Malaysian education scenario, and existing research shows that a critical approach to teaching and learning about global issues is largely absent within Malaysian school settings. Thus, the purpose of this study is to explore the GC elements, embedded in the Malaysian education curriculum within the...

Environmental impact assessment (EIA) is a preemptive tool used by engineers, environmental consultants and planners to avoid the most likely adverse consequences of development projects. As a planning tool, EIA should curb the harmful effects from all stages of a project lifecycle. Landslides and flash floods are the most common problems faced by...

In the determination of the bioavailability of drugs administered orally, the drugs' solu-bility and permeability play a crucial role. For absorption of drug molecules and production of a pharmacological response, solubility is an important parameter that defines the concentration of the drug in systemic circulation. It is a challenging task to imp...

The purpose of this study is to evaluate the value derived by the local community from cultural heritage and natural heritage in Jugra, Kuala Langat, as it has the potential to be a recognized heritage tourism site. The quantitative approach was used by conducting a survey study. A total of 392 respondents among the local community were selected th...

Six different solvents were used as extraction medium (water, methanol, ethanol, acidified methanol, benzene and acetone) to check their phenolics extraction efficacy from flour of two rye cultivars. Rye extracts with different solvents were further analyzed for the estimation of phytochemicals and antioxidant properties. Different tests (TPC, TAC,...

Polymer composites filled with metal derivatives have been widely used in recent years, particularly as flame retardants, due to their superior characteristics, including high thermal behavior, low environmental degradation, and good fire resistance. The hybridization of metal and polymer composites produces various favorable properties, making the...

Over recent years, enthusiasm towards the manufacturing of biopolymers has attracted considerable attention due to the rising concern about depleting resources and worsening pollution. Among the biopolymers available in the world, polylactic acid (PLA) is one of the highest biopolymers produced globally and thus, making it suitable for product comm...

Despite growing urban electricity consumption, information on actual energy use in the household sector is still limited and causal factors leading to electricity consumption remain speculative due to urban expansion and its growing complexity, particularly in developing countries such as Malaysia. This study aims to examine the critical determinan...

Despite growing urban electricity consumption, information on actual energy use in the household sector is still limited and causal factors leading to electricity consumption remain speculative due to urban expansion and its growing complexity, particularly in developing countries such as Malaysia. This study aims to examine the critical determinan...

Education for the environment and sustainable development is the one important thing for being studied. At formal school in Indonesia, it was integrated into the subject matter like social science, natural science, geography, or biology. The study about geography education for promoting sustainability had not been thoroughly done in Indonesia. Ther...

Natural cellulosic fibres, such as kenaf, have potential for use as replacement of man-made fibres in polymeric composites. The rapid depletion of synthetic resources, such as petroleum, and the growing consciousness of global environmental problems related to synthetic products push toward the acceptance of natural fibres as biocomposite component...

Dengue is the main health problem in Malaysia. One of the main causes of dengue is the lack of participation in combating dengue. To improve participation, stakeholder’s engagement is considered the best solution which promotes an effective way of forming good governance. Engagement involves a level of knowledge, awareness, and understanding throug...

Recently, advanced technologies exploit materials from nonrenewable resources such as petroleum, natural gas, metal ores, and minerals. Since the depletion of these resources and environmental issues, it has brought attention to researchers to progress in the development of biodegradable materials from green composites. Most biofibres and biopolyme...

The growing trend of energy consumption in urban area has created negative impacts to the urban environment because the issues related to energy use and urban developments are largely dependent on human aspects and mobilized by the inhabitants of the city itself. This study aims to estimating the electricity consumption with regards to electrical a...

To ensure environmental sustainability without dengue, many of dengue control techniques have been introduced including Wolbachia-infected Aedes mosquitoes. This technique is still new in Malaysia and will be expanded as applied by the Ministry of Health, Malaysia. Therefore, this study is very important to governments, professionals, and industrie...

Regional autonomy, geographical spread, as well as the social and cultural diversity of Indonesia should be an important factor for the strengthening of the Regional Innovation System. This paper dealt with the implementation of the Regional Innovation System in Riau Province viewed from the dimension of the system context "Collaborative Governance...

Background: Malaysia's population is set to reach 33.10 million by the end of 2020. About 75% of the population of Malaysia lived in urban areas and cities. The metropolitan area of Greater Kuala Lumpur had a population of more than seven million that year, making it the largest urban area in Malaysia. Kuala Lumpur as the city centre for Greater Ku...

A simulated model was developed in order to design and simulate the mechanical properties of a cantilever beam creep testing rig for a full-scale size crossarm in transmission towers. Currently, the Malaysian power grid system is implementing several materials, such as Chengal wood, polymeric composite, and galvanised steel, as crossarm structures....

This manuscript explains the conceptual design of carbon fibre reinforced polymer composites portable fire extinguisher. In this project, the integration of theory of inventive problem solving (TRIZ), morphological chart and analytic network process (ANP) methods was applied to produce the concept designs. The current design of fire extinguisher po...

This study aimed to examines the nexus of population, gross domestic product (GDP) growth, electricity generation, electricity consumption, and carbon emissions output using the time series data. This study employed the time series analysis, Pearson correlation, and regressions analysis to identify the pattern, relationship among variables and dete...

This paper analyzes and explains the design an adaptive-collaborative approach as a communication model to reduce a conflict resolution of the Lore Lindu National Park (LLNP), Central Sulawesi, Indonesia. The method used was a case study in which the focus was on the conflict of land use between the Dongi-dongi community and the Lore Lindu National...

The purpose of this study was to determine and compare fat composition and chemical properties of fish fillets of selected warm-water fish obtained from Straits of Malacca. A cold water fish, namely salmon was used for comparison. Moisture content, crude fat, fatty acids composition and chemical characteristics of fish fillets of Yellowstripe scad,...

The present work was aimed to optimise the supercritical carbon dioxide extraction of dabai oil from dabai pulp and defatted pulp using RSM in comparison with hexane extraction method. Fatty acid profile and antioxidant properties of the extracted dabai oil were also determined. Optimal RSM conditions were 36 MPa pressure, 40°C temperature and 21 m...

Citrus peel is a functional food. It is rich in antioxidants. This study aims to investigate the antioxidant properties of selected fresh and frozen peels of Citrus species. Frozen and fresh peels of lemon (Citrus limon), key lime (C. aurantifolia) and musk lime (C. microcarpa) were screened for their antioxidant properties such as total phenolic c...

Most of transmission line (TL) towers are designed and fabricated in the form of lattice using galvanized steel. The crossarm of the TL is made of Neobalanocarpus or Chengal wood. Recently, it has been reported by an electrical corporation situated in Malaysia that mechanical performance of the wooden crossarm declined below their service life of 4...

Abstrak Malaysia merupakan salah sebuah negara yang sedang pesat membangun dari segi pertumbuhan ekonomi, sosial mahupun pembangunan guna tanah. Selari dengan itu, permintaan terhadap sumber tenaga elektrik bagi tujuan pengangkutan, perindustrian dan domestik turut bertambah. Peningkatan ini dipacu oleh peningkatan populasi penduduk dan pertambahan...

Medical genetics is a new field in Malaysia. It refers to the application of genetics in a medical context that involves the diagnosis, prevention and treatment of genetic diseases. The development of this area depends heavily on public acceptance. According to one particular theory of decision making, an individual will form attitudes about techno...