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56512021
Article
Three-dimensional flow of nanofluid over a non-linearly permeable shrinking sheet
Siti Hidayah Muhad Saleh
The nanofluid flow past a permeable non-linear shrinked surface for three-dimensional case is considered in this paper. The governing equations are first modelled, and the similarity transformation technique is conducted with the aim to obtain a set of nonlinear ordinary differential equations systems from the nonlinear partial differential equations form. The solutions are attained numerically by solving the obtained similarity equations and then solved by the shooting approach. The physical explanation on the impact of the governing parameters is presented through tables and graphs. The influences of the governing parameters on the local Reynolds number in x and y direction, local Nusselt number along with the velocity profiles have been discussed. Additionally, this present problem also discovered the existence of dual solutions. The obtained result has been compared with previous open literature results and it is revealed to be in good agreement. ? 2021. RIGEO. All Rights Reserved......

752 hits

56522021
Article
Thinking level in education: a complete revision of Anderson's Taxonomy
Ichsan Ilmi Zajuli
Annotation. The study aimed to revise Anderson?s taxonomy and implement the new taxonomy in learning. The study used the descriptive method and there were 6 types of instruments used according to new taxonomy. The results showed that students? knowledge scores were still in a very low category at the Natural science, Environment, and Social Science at School and University levels. This study concluded that a new taxonomy had been developed and its implementation indicated that students? knowledge score was still very low. ? 2021, Vilnius Pedagogical University. All rights reserved...

1540 hits

56532021
Article
Thermomechanical, crystallization and melting behavior of plasticized poly (Lactic acid) nanocomposites
Izan Roshawaty Mustapa
The incorporation of filler and plasticizer provides effective nucleation and mechanical reinforcement in polymer composites to impart flexibility, toughness, thermal stability and tensile strength of poly (lactic acid) (PLA) composites that can be used in the development of packaging applications. In this paper, the inclusion of plasticizer and reinforcement of nanofiller in PLA matrix prepared using solvent casting and thermocompression methods aim to improve the thermomechanical properties that consequently alter the crystallization and melting behavior of PLA composites. Plasticized PLA with different percentages of titanium dioxide (TiO2) at 2.0, 3.5, 5.0, and 7.0 % w/w were dispersed in PLA solution using a mechanical mixer and ultrasonication technique to introduce a matrix reinforcing nanophase within the composite. The thermomechanical properties and thermal behavior of PLA nanocomposites were characterized using dynamic mechanical analysis (DMA) and differential scanning calo.....

1353 hits

56542021
Article
Thermomechanical study and thermal behavior of plasticized poly (Lactic acid) nanocomposites
Zorah Mohammed
Poly(lactic acid) (PLA) is a useful alternative to petrochemical commodity material used in such as in food packaging industries. Due to its inherent brittleness, low thermal stability, and poor crystallization, it needs to improve its properties, namely in terms of thermal and mechanical performance. The plasticized PLA composites reinforced with nanofiller were prepared by solvent casting and hot press methods. Thermal and mechanical properties, as well as the crystallinity study of these nanocomposites, were investigated to study the effect of tributyl citrate (TBC) and TiO2 on the PLA composites. The addition of TBC improved the flexibility and crystallinity of the composites. Reinforcement of TiO2 was found as a practical approach to improve the mechanical properties, thermal stability, and enhanced crystalline ability for plasticized PLA nanocomposites. Based on the results achieved in this study, the composite with 3.5% nanofiller (pPLATi3.5) presented the optimum set of mechani.....

1115 hits

56552021
Article
Thermomechanical properties and thermal behavior of poly (Lactic acid) composites reinforced with tio2 nanofiller
Nur Ain Syafiqah, Sudin
The reinforcement effect of nanofiller in polymer enhanced the thermal stability, physical and mechanical properties of poly(lactic acid) (PLA) composites with good reinforcing capabilities for bio-based polymers. In this paper, the effect of reinforcement of titanium dioxide (TiO2) nanofiller on the mechanical properties and thermal behavior of PLA matrix are reported. PLA/TiO2 nanocomposites with different percentages of 2.0, 3.5, 5.0 and 7.0 % w/w were prepared by using solvent casting and thermocompression method. TiO2 were dispersed in PLA matrix using mechanical mixer and ultrasonication technique. The thermomechanical properties and thermal behavior of PLA nanocomposites were characterized using dynamic mechanical analysis (DMA) and differential scanning calorimeter (DSC). The increased in storage modulus by the addition of nanofiller with the highest increment provided by 2.0 % w/w TiO2 indicated a strong influence and better interfacial bonding between nanofiller and PLA matri.....

1393 hits

56562021
Article
The utilization of waste cooking palm oil as a green carbon source for the growth of multilayer graphene
Mohd Firdaus Malek
Waste cooking palm oil (WCPO) has been utilized as a green carbon source for the synthesization of graphene by double thermal chemical vapor deposition. The WCPO was placed in the first furnace (precursor furnace) whereas nickel was placed in the second furnace (deposition furnace). The deposition temperatures were varied between 850 and 1100��C. Raman results reveal the highest 2-D peak for the sample synthesized at 1000��C, which indicates the high-quality formation of graphene. Besides, the sample also shows good crystallinity with a sharp peak at 26.8� which represents the hexagonal graphite structure and the introduction of graphene sheet formation. On the other hand, the FESEM image displays hexagonal structures since the graphene layers were formed after the precipitation of the carbon. Meanwhile, the UV-Vis result shows the highest reflectance in the visible light region which indicates the presence of the graphene layer on Ni. [Figure not available: see fulltext.] ? .....

1215 hits

56572021
Article
The usability of i-suyyah: a mobile tourism application for Arab tourists in Malaysia
Wan Ab Aziz Wan Daud
Globalisation and the rapid growth of technologies call for ease and automation in different aspects, including in tourism. Tourism is an important sector in Malaysia as it generates income for the country. In recent years, Malaysia has seen a surge in the arrival of high-spending Arab tourists. This reflects the need to provide a tool, specifically a tourism mobile application in the Arabic language, that could help ease their journey in Malaysia. Thus, this study aims to determine the usability of the i-Suyyah mobile application for Arab tourists in Malaysia. The data obtained were analysed using the Fuzzy Delphi method, and twelve experts were selected to analyse the fuzziness consensus. It was found that the i-Suyyah mobile application recorded a high percentage of expert consensus, specifically on its usability. All usability items have reached unity with the threshold value of d 0.2, and the percentage of consensus among the expert group is more than 83%. ? 2021, Universidad de H.....

923 hits

56582021
Article
The usability of CK-12 application in teaching and learning in 21st century for topic statistics among form 4 students in USJ, Subang Jaya
Raja Noor Farah Azura Raja Maamor Shah
This study aims to determine the usability of CK-12 application in 21st century learning for topic Statistics, among the form 4 students in USJ, Subang Jaya. Specifically, the objectives of this study are to identify the level of competence, level of satisfaction and level of feasibility of CK-12 application in 21st century learning for topic Statistics among form 4 students in USJ, Subang Jaya. Quantitative approach with descriptive survey were used for this study. A number of 300 form 4 students from five different schools in USJ, Subang Jaya were chosen as research samples using random sampling method. Research instrument used is a set of questionnaires with 30 questions on the level of competence, satisfaction and feasibility of CK-12 application for the topic of Statistics form 4. The data collected were analysed using Statistical Package for Social Science (SPSS) version 23.0 to obtain the value of percentage, mean and standard deviation. Mean scores and standard deviations were .....

1695 hits

56592021
Article
The trend of Body Mass Index (BMI) changes among malaysian children and the prediction at 48 months old
Aslina Saad
Overweight and underweight are common issues among children in Malaysia and thus, Malaysian government has launched several campaigns to combat these problems. Previous research show that BMI at certain age could be predicted earlier so that early intervention can be initiate. Most of the study are very specific to some locality and certain ethnic, make it hard to generalize to the whole Malaysian. This research aims to investigate significant positive predictors of changes in Body Mass Index (BMI) of young children aged from 12 months to 48 months and to develop a prediction model for their BMI status (normal, overweight, obese, risk of overweight, underweight, and severe underweight). Data consisting of 558 records with 16 attributes involving 18,226 children, who had registered at the National Child Data Centre (NCDC) were analyzed and predicted using the decision tree algorithms of Rapid miner. The BMI of 48 months-old children can be reliably predicted by their BMI statuses at the.....

1559 hits

56602021
Article
The roles of absorptive capability and innovative capability in improving export performance: a preliminary study
Zuraini Samsudin
This paper aims to identify the roles of innovative capability, especially on absorptive capability in improving Malaysian export performance. Specifically, this paper provides a definition of absorptive capability, innovative capability, and export performance obtained from previous studies. This is a content analysis involving relevant articles that were identified using both electronic and manual bibliographic search methods. Overall, there is empirical evidence on the roles of innovative capability that serve as a mediator in the relationship between absorptive capability and export performance. This study provides one of the few attempts in assessing existing literatures and examining the roles of innovative capability in the relationship between absorptive capability and export performance. Thus, it provides a reference point that can stimulate and guide future research on the roles of innovative capability as dynamic capabilities. ? 2021, Allied Business Academies. All rights re.....

1021 hits

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