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|Article Title & Authors (Volume 13, Issue 2, April - 2020)
|The Elaboration of System of the Digital Programmed Control of Grinding Process Accuracy
International Journal of Advances in Engineering & Technology (IJAET), Volume 13 Issue 2, pp. 1-12, April 2020.
The given article deals with the problems connected with the elaboration of system of the digital programmed control of grinding process accuracy which was used in the construction of information model of the basis of database systems. The idea of Technological primitive was used for the first time, in the limit of which the for-mation of systematically constant error occur in mechanical cutting. For formation of accuracy operation programs was used by means of synthesis of technological primitives of the conformity table . The correla-tion was installed between automated draft of technological operations and conduct of their accuracy. In the given automated system except operating conditions of cutting calculation of elastic deformations of techno-logical systems, forecasting cutting accuracy, construction of cutting surface topography and determination the programs of operating process accuracy.
|Applications of the Main Devices Based on Josephson Junction: A Review
Roberto Marani and Anna Gina Perri
International Journal of Advances in Engineering & Technology (IJAET), Volume 13 Issue 2, pp. 13-23, April 2020.
In this paper we present a review of the main applications of Josephson Junction (JJ). This device bases its properties on the Josephson Effect, based on the relationship between Tunnel Effect and Superconducting Theory. The properties of JJ allow to realize Superconducting Quantum Interference Devices (SQUIDs), used in medical field, or industrial level electronic circuits such as Superconducting Qubits. We also describe the hybrid technology named RSFQ-CMOS, which is not realized yet for general purposes because it requires cryogenic cooling system. Although, if this problem will be bypassed, the devices based on Josephson Junction will be ready to substitute the current electronic and its limitations.
|Alkaline Hydrogen Peroxide Pretreatment of Acai Seeds Waste (ASW) for Fermentable Sugars and Ethanol Production
Johnatt Allan Rocha de Oliveira, Marcele Fonseca Passos, Adriene Carvalho da Conceicao
International Journal of Advances in Engineering & Technology (IJAET), Volume 13 Issue 2, pp. 49-56, April 2020.
The possibility of converting lignocellulosic waste into ethanol and sugars is commercial and environmentally interesting, since both are the basis for countless materials for chemical use. The objective of this work was to evaluate the pre-treatment with alkaline hydrogen peroxide (AHP) of the acai seeds for production of fermentable sugars and ethanol. A full factorial design 3(2-0) was carried out with the variables: pre-treatment temperature (25-60 degree C) and concentration of alkaline hydrogen peroxide (4-10%). The pre-treated material was hydrolysed with 15 FPU/g of Celluclast 1.5 L from Trichoderma reesei and the released glucose levels were measured. The best pre-treatment condition (4% peroxide at 4% at 60degree C for 60 min.) was used to produce enzymatic hydrolysates that were fermented in Erlenmeyer and reactor/fermenter, and the ethanol and glucose yields were analysed on HPLC. The highest glucose yield found was 5.95 g.L-1; and the maximum yields of ethanol in the fermentation were 2,41 g.L-1 in Erlenmeyer and 2,69 g.L-1 in the reactor/fermenter. The volumetric ethanol production rate were 0.10 and 0.11g.L-1.h-1.
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