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2251

Dual heteroatoms doped nanocarbons: Electrocatalysts for hydrogen peroxide synthesis

Abstract

Metal-free N–S- and N–P-doped nanocarbon (SCNP and PCNP) electrocatalysts prepared through sustainable microwave-assisted synthesis using hemigraphis alternata plant leaves. The prepared heteroatom-doped nanocarbon materials are active catalysts for the two-electron oxygen reduction reaction (ORR) to produce 65–70% of hydrogen peroxide. As evidenced from the XPS, most proportion of the doped heteroatoms contain the oxygen functional groups in the nanocarbons. These attributes are the critical factors to see the selective two-electron transfer ORR for the PCNP and SCNP. This approach shed light on the critical role of dual heteroatoms doping and the oxygen functionalities in nanocarbon towards the selectivity of ORR. We believe that this method would allow the preparation of heteroatom that contains oxygen functionalities. Our work paves a sustainable way of preparation of nanocarbon based ORR catalysts that are only selective for two-electron transfer process. Graphical abstract:.....

Article Published 2024 349 hits Available

2252

The influence of play and conventional approaches on the basic movements of children aged 9-10 years

Jaffry Zakaria

Abstract

This research was conducted on the basis of the low level of basic movement skills of children aged 9-10 years. It is thought that many factors influence other game approaches, conventional and physical fitness. This research aims to determine the effect of play, conventional and physical fitness approaches on the basic movements of children aged 9-10 years. This type of research is a quasi-experiment with a sample size of 40 people divided into two groups using ordinally meat pairing, 20 experimental people and 20 control people. Basic movement skills are obtained with the TGMD-2 test which consists of locomotor movements and object control. Data were analyzed using the t-test technique. The results of research and data analysis show that children who use a play approach are better than conventional children, as seen from their basic movement skills and physical fitness, sig 0.000..

Article Published 2024 466 hits Available

2253

Thermal and radiation shielding characteristics of erbium ions doped zinc tellurite glasses

Mohd Haniff Mohd Tahir

Abstract

Tellurium, zinc, and erbium oxides glasses are made using the melt-quenching technique. The XRD results show that the glass samples are naturally amorphous. The TeO4 units' extended vibration are performed using FTIR. On the other hand, the TeO3 as well as Er2O3 are detected using deconvolution. When the concentration of erbium ions increases, the density and molar volume will also increase. The high value of thermal diffusivity at 0.02 and 0.03 M fractions, a large value of glass stability (greater than 100 °C), and strong thermal stability are excellent for fibre drawing. As a result, the highest linear attenuation coefficient (LAC) values are found for the sample with 5 mol% Er2O3 content, where the values drop suddenly from 0.95744 to 0.21065 cm−1 over the tested energy which ranges between 0.284 and 2.51 MeV. Among the TZEr samples, TZEr5 has the lowest half-value layer (HVL) values ranging from 0.00243 to 0.08252 cm. Thus, both LAC and HVL are considered as suitable options fo.....

Article Published 2024 341 hits Available

2254

Authenticity in food: Scale development and validation

Zahidah Ab Latif

Abstract

Given the limited empirical evidence on conceptualizing authenticity in food, this study explored the dimensionality of perceived authenticity in food within a state fair setting. By using a rigorous scale development procedure through a mixed method, this study developed and validated a set of scales to measure authenticity in food and confirmed four underlying factors of food authenticity: unique, original, local, and traditional. The findings provide a foundation for scale development along with theoretical insights on authentic food with the four dimensions identified. Practically, this study provides managerial guidelines for state fair organizers to better evaluate food authenticity concerning the four dimensions, plan strategic marketing tools that could attract more consumers, and improve their offerings to visitors’ authentic experiences. © 2022 Taylor & Francis Group, LLC...

Article Published 2024 432 hits Available

2255

A review of current metaverse applications as a tool for reshaping human behaviour in health communication

Hafizul Fahri Hanafi

Abstract

In line with the objectives of Industry 4.0, the Health 4.0 initiative promotes the integration of cutting-edge technology into medical practice. The Health 4.0 concept includes virtual reality (VR) as a component that has the potential to play an important role. Even though VR in the medical field is a hot issue right now, there is still a lack of understanding about VR-assisted treatment from a broad viewpoint. The combination of healthcare with the metaverse will result in more efficient resource distribution and usage within the healthcare system. The data pertaining to healthcare in the metaverse are kept on a public server, and Artificial Intelligence (AI)-based devices are used to retrieve it. Through the use of metaverse's healthcare systems, patients get a diagnosis in a timely manner. Because the metaverse is meant to be used for specific things, its effects on society, the economy, and culture are also determined by those things. The main findings of this review are to highl.....

Article Published 2024 525 hits Available

2256

Moon phases: A brief overview of android application development in science subject

Noor Hidayah Che Lah

Abstract

Moon phases are the part of the moon shape that is directly illuminated by the sun as seen from the earth. The moon phases change gradually in about 27 days as the positions of the moon's orbit around the earth and the earth's orbit around the sun shift. The part of the moon that can be seen is from the reflection of sunlight and it depends on the position of the moon in its orbit. However, most students do not clearly understand the concept of moon phases and were unable to explain the factors that influence the occurrence of moon phases, identify changes in the shape of moon phases, sketch the order according to the sequence of moon phases and name the moon phases. As a result, the purpose of this research is to create an android application for the moon phases topic, which also serves as a medium of teaching aids for teachers and students. The foundational knowledge elements through the 3x3 Model of 21st Century Learning have been embedded through this android application. The metho.....

Article Published 2024 281 hits Available

2257

Prediction of rainfall trends using forecasting approaches based on singular spectrum analysis

Shazlyn Milleana Shaharudin

Abstract

Advanced technologies such as the Internet of Things provide an integrated platform for weather focusing, including rainfall and flood prediction. Large rainfall data frequently contain noise, which can be difficult to analyze using a standard time series model due to violated assumptions. Singular spectrum analysis (SSA) is a model-free time series analysis method that is widely used. This study aims to predict the rainfall trends in the Special Region of Yogyakarta, Indonesia, using the Recurrent SSA (SSA-R) and Vector SSA (SSA-V). The SSA-R forecasts using the recurrent continuation directly with the linear recurrent formula, while the SSA-V is a modified recurrent method. This study used 50 years of monthly rainfall data (1970-2019) from 25 stations in the special region of Yogyakarta, Indonesia. The SSA steps for forecasting rainfall data include decomposition (embedding and singular value decomposition), reconstruction (grouping and diagonal averaging), and evaluating the SSA mod.....

Article Published 2024 248 hits Available

2258

Nanosheet zinc oxide synthesized by solution-immersion method for triboelectric nanogenerator

Suriani Abu Bakar

Abstract

Most global problems are being solved by using sustainable energy harvesting technologies to retain the social ecosystem in great condition. The triboelectric nanogenerator (TENG) which is a renewable energy harvesting device, collects the waste mechanical energy from its surroundings and performs the electric signal conversion. TENG have garnered increased attention in recent years by offering prospective use in energy harvesting technology. Particularly, there is a need for flexible energy conversion that serves as a power supply for portable electronic equipment. In this study, ZnO nanosheet thin film prepared on the flexible conductive aluminium foil through a low temperature immersion technique was used to generate electrical energy. The effect of heat treatment on ZnO nanosheet thin film was also investigated on the surface morphology, structural properties and nanogerator performance. The high density of interconnected ZnO nanosheet were observed before and after heat treatment .....

Article Published 2024 550 hits Available

2259

Fabrication and characterization of a novel mullite-stainless steel composed hollow fibre membrane for oil/water separation

Suriani Abu BAkar

Abstract

Low-cost mullite-kaolinite material has recently received more attention as an alternative to conventional ceramic materials such as alumina and silica to prepare ceramic hollow fibre membranes (CHFMs) due to its high alumina contents and silica and thermal/chemical stability. However, weak bending strength is still one of the key bottlenecks that delay their commercial applications. In this work, we successfully fabricate a novel mullite-SS HFM with enhanced bending strength using mullite-kaolinite power with different stainless steel alloy (SS) 316 L contents of 0.0, 2.5, 5.0, 7.5, 10 and 12 % (w/w) as a reinforcement material by phase inversion/sintering techniques. The SS alloy was a potential material to enhance the mechanical strength of mullite HFMs due to its excellent mechanical properties. The effects of the major fabrication parameters of SS contents, mullite contents, and fabrication parameters such as air gap distance and bore fluid flow rates were well studied and evaluat.....

Article Published 2024 281 hits Available

2260

Game-based learning: Current practices and perceptions of secondary school physics teachers in Malaysia

Balakrishnan, Balamuralithara

Abstract

A plethora of studies showed the effectiveness of game-based learning (GBL) in enhancing students’ learning and motivation. There has been increasing academic interest in GBL. However, a review of past literature in this context shows that teachers’ attitudes, in general, toward GBL and the actual adoption of GBL in teaching physics by secondary school teachers in Malaysia have not been addressed in-depth or addressed only to a minor extent in past studies. This article sheds new light on secondary school physics teachers’ perceptions of GBL usage, the implementation level of GBL in teaching physics, and teachers’ involvement in educational games design. A total of 211 secondary school physics teachers participated in this study. Quantitative data were collected via survey, and the main findings show that only 29.9 percent of teachers designed educational physics games and adopted the games in teaching physics. The implementation level of GBL in teaching physics at the secondar.....

Article Published 2024 414 hits Available

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