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This study investigates numerically the thermal-hydraulic performance of 0.02-1% water-based Al2O3 nanofluid in circular and square ducts with and without twisted tape insert. Two twist ratios of 5 and 0.579 are examined. The Reynolds number considered is from 20000 to 100000. The two-phase approach is employed to simulate the flow of nanofluid. The thermal performance of nanofluid in the circular pipe with insert is better than the case of the square duct with insert, but the friction factor of the circular tube is also relatively larger. Furthermore, a lower twist ratio yields a higher heat transfer rate. The results also reveal that the incorporation of nanoparticles and twisted tape insert contributes to heat transfer augmentation but at the expense of a higher friction factor. Nevertheless, from the thermal-hydraulic perspective, their application in circular and square tubes is considered practicable as the values of performance evaluation criteria obtained are more than one. The maximum thermal performance factor of 2.546 is achieved by 1% Al2O3 nanofluid in the circular duct with insert (twist ratio: 0.579) at the Reynolds number of 20000. Therefore, the use of the circular tube with insert is more favourable compared to that of the square tube. [ABSTRACT FROM AUTHOR]

The main aim of the present research is to improve the interlaminar shear strength (ILSS) of angora fiber and nano filler-based hybrid composites at low temperatures. Materials and Methods: In the present work, angora fiber is considered a control group and Titanium Oxide nanofiller an intervention or experimental group. The study includes 40 distinct samples. Among these 20 specimens, one was considered an experimental group, while the remaining 20 were considered a control group. The independent group test is performed with 80% of G power. The composite specimens were tested as per the standard ASTM requirements. Results: The results reveal that a concentration of 4.5 wt.% nano- Titanium Oxide particles have a substantial influence on the hardness of nanomaterials. The interlaminar shear behavior of natural fiber-based polymers and hybrid laminates is 28.27 MPa and 37.89 MPa, correspondingly, with a two tailed significant value of 0.005 (p<0.05). Conclusion: The addition of 4.5 wt% nanoscale Titanium Oxide to angora composites improves the new composite's strength significantly. As a result, the fraction of nano Titanium Oxide particles in biocomposites is crucial in determining the mechanical properties of the composite. [ABSTRACT FROM AUTHOR]

Humans and other animals consume commercially produced fungus and fungal products. Different secondary metabolites like enzymes, organic acids, and biocontrol agents are produced by fungal groups like decomposers and antibiotic makers. The variety, location, and commercial significance of the fungus population's potential to produce extracellular enzymes in soil samples from Kodaikanal Shola are the subjects of the current study. A total of 34 different fungus species, including Aspergillus, Absidia, Penicillium, Trichoderma, Rhizopus, Drexchelara, and Mucor, were discovered. Aspergillus niger was the most prevalent species among them. Based on their predominance enzymatic features, Aspergillus niger was utilized for future research. Under several circumstances of temperature (15°C, 37°C, and 45°C) and pH, the isolated organism's best growth parameters for producing enzymes were investigated (5,7 and 9). Amylase (0.0068 IU/ml), followed by lipase (0.005 IU/ml), protease (0.0032 IU/ml), and cellulase (0.0026 IU/ml) enzymes, was the enzyme most abundantly generated from A. niger at 45 °C and pH 7 (0.0078 IU/ml). This study raises the possibility of using A. niger as a key source for the industrial production of vital enzymes. [ABSTRACT FROM AUTHOR]

In this article, we prove coupled fixed-point theorems on R-metric space. As per our obtained results, we provided an example to straighten our results. We have given an application on integral equation to endorse our outcomes. [ABSTRACT FROM AUTHOR]

The purpose of this study is to increase the band gap to improve the reliability and life span of magnetic storage media, by doping it with zinc and cobalt and comparing it to iron oxide that has not been doped. Zinc-doped, cobalt-doped, and pure iron oxide nanoparticles were synthesized using a novel sol-gel method. The sample size for each type was 250, and the total sample size was 750. The sample size was calculated with a pretest power of 80% and an error correction of 0.05 using clinical app. Pure iron oxide nanoparticles have a surface area of 84.87 nm2, while zinc-doped iron oxide has a surface area of 57.54 nm2 and yields consistent results. The sample size for pure iron oxide, cobalt, and zinc-doped iron oxide nanoparticles was 220 each with a total of 660 samples. The significant value obtained was 1.0, indicating no statistically significant difference between the three groups. The nanoparticles were annealed at temperatures between 200-500°C for 3 hours to analyze temperature effects. Cobalt-doped iron oxide nanoparticles demonstrate a higher absorbance compared to pure iron oxide and zinc-doped iron oxide. The mean absorbance values for pure iron oxide, zinc-doped iron oxide, and cobalt-doped copper oxide were 0.01513468, 0.015859823, and 0.56434931, respectively. These results suggest that cobalt-doped Iron oxide nanoparticles have the highest absorbance. [ABSTRACT FROM AUTHOR]

In line with the Malaysian government's efforts to increase renewable energy in energy generation to 30 percent by the year 2030, ambitious efforts are being made to promote the implementation of utility-scale solar PV plants with ample policy backing. The goal of the current study is to use PVsyst software to evaluate the economic and environmental assessment of On Ground PV (OPV) system. This paper serves as a pioneering study on the design, simulation, economic evaluation, and environmental assessment of a 300-kW grid-connected Photovoltaic (PV) system installed on the ground at Xiamen University Malaysia. The effectiveness of the proposed design is evaluated from 1st January 2022 to 31st December 2022 using the PVsyst software version 7.2, which works on accurate plant specifications. The simulation is performed using PVsyst 7.2 software to design the whole system properly. Four main systems were considered for this stare i) Assessment of geographical location and meteorological data, ii) Development of orientation analytics and optimal PV layout, iii) development of PV model which includes detailed losses calculation and shading analytics, iv) Development of technical performance, economic evaluation, and environmental assessment. The proposed PV design is expected to provide 100 % of the A5 building's lightning electricity energy consumption while reducing CO2 emissions by 3648.904 tonnes throughout the lifespan of the system's deployment. The article also documents significant emission reduction and cost analysis calculations for the proposed design. were evaluated for their monthly energy production, losses, greenhouse gasses (GHG) savings, and economic sustainability throughout the year 2022. [ABSTRACT FROM AUTHOR]

The performance of operator will be affected by different operation environments [1]. Moreover, poor operation environment may cause health problems of the operator [2]. Physical and psychological considerations are two main factors that will affect the performance of operator under different conditions of operation environment. In this paper, applying scientific and systematic methods find out the pivot elements in the field of physical and psychological factors. There are five main factors including light, temperature, noise, air flow and space that are analyzed. A numerical ergonomics model has been built up regarding the analysis results which can support to advance the design of operation environment. Moreover, the output of numerical ergonomic model can provide the safe, comfortable, more productive conditions for the operator. [ABSTRACT FROM AUTHOR]

With the booming in the manufacturing sector of shoe, garments and toy, etc. in pearl region, training the usage of various facilities and design the facility layout become crucial for the success of industry companies. There is evidence that the use of virtual training may provide benefits in improving the effect of learning and reducing risk in the physical work environment. This paper proposed an advanced web-based training environment that could demonstrate the usage of a CNC machine in terms of working condition and parameters selection. The developed virtual environment could provide training at junior level and advanced level. Junior level training is to explain machining knowledge including safety factors, machine parameters (ex. material, speed, feed rate). Advanced level training enables interactive programming of NG coding and effect simulation. Operation sequence was used to assist the user to choose the appropriate machining condition. Several case studies were also carried out with animation of milling and turning operations. [ABSTRACT FROM AUTHOR]