Vol. 07, No. 10 [October 2021]

Currently, the individual needs a high immune system in order to fight against increasing diseases and/or epidemics. Macro, micro and functional foods that should be taken in the daily diet may be insufficient owing to various reasons. Therefore, the importance of the use of food supplements and functional foods which are recommended by experts has been increasing in recent years. In this study, effervescent tablet prototypes that support the immune system of the individual, which different antioxidant source (turmeric, cinnamon and pomegranate peel) and sodium-caseinate combinations,were produced with the aid of the Box-Behnken experimental design.Also some of the properties including dissolution time, pH, total acidity, density and viscosity, andamounts of phenolics, dry matter, sugar were optimized by means of Design Expert program.As a result, it was concluded that the combinations of parametersstudied had a remarkable effect on the dissolution time and phenolic content, wheres they did not have significant effect on other properties.
Key Words: Design Expert, Effervescent tablet, Antioxidant

When sparse dot-matrix image of halftone dots (printing-quantum-dots image) is used to realize information recording, information hiding, and information anti-counterfeiting, there is a problem of high bit error rate caused by the stain of printed information and the misjudgment of read information. In this paper, a reliable encoding and decoding algorithm of sparse lattice information based on printing-quantum-dots image is proposed. The encoding algorithm use a combination of information encryption, Low-Density-Parity-Check (LDPC) encoding, interleaved encoding and frame synchronization encoding, generating the printing-quantum-dots image. The decoding algorithm is the inverse process of the encoding algorithm, and can partially intercept the printing-quantum-dots image for reading. From the experimental results, it can be concluded that the combined coding scheme has better error-correcting ability and imperceptibility, the SSIM of before and after embedding reaches above 0.99, and the PSNR reaches above 54dB. Moreover, it can extract the printing-quantum-dots from the cover image, and read the hidden information. Besides, compared to BCH code, and convolutional code, it has high coding efficiency, prominent coding efficiency, as well as faster decoding speed.
Key Words: Dot-matrix image, Halftone dots, Information anti-counterfeiting, Information hiding, Reliable encoding and decoding

Experimental investigations were carried out to determine the Tensile and Hardness characteristics of cast AA6063 Aluminium rods produced from sand and permanent cast moulds. Sand and permanent moulds were fabricated and used to produce Aluminium rods. The test samples from cast rods were subjected to Tensile and Hardness tests. The results obtained showed better Tensile and Hardness properties, in the sand cast samples than that of permanent cast samples. The hardness of permanent and sand casting varied from 66.5Hv to 70.0Hv. Also, Ultimate Tensile Strength increased from 108.78MPa in permanent casting to 161.97MPa in sand casting. Conversely, the Tensile and Hardness properties of the cast products improved from those of permanent casting to sand casting. Therefore, sand cast products could be used in as-cast condition in engineering applications requiring better quality parts while permanent casting may be used in as-cast condition for non-engineering applications or engineering applications requiring less quality parts.
Key Words: Cast Aluminium Rods, Hardness Properties, Permanent Mould, Sand Mould. Tensile Properties

This new work presents the Advection Diffusion Reaction Equation under mixed boundary conditions, for a case of contamination transport which is solved by means of the Fourier Series and the Green Function, giving an alternative to the case of numerical solution and with a forcing at a specific point, a simpler Fourier coefficient than the previous case of the previous work of the complete solution will be found, which together with a pollutant rate as a function of time will be modeled for the One-dimensional solution, the software used For the simulation it is Matlab 2020, showing optimal results within the conditions indicated together with the variables of wind speed, diffusion coefficient and chemical reaction.
Key Words: Fourier series, Dirac Delta function, Diffusion Advection Equation, Variable Separation, Adjoint approach.