THE APPLICATION OF INFORMATION TECHNOLOGIES DURING MAINTENANCE TO ENSURE THE RELIABILITY OF THE OPERATION OF AVIATION EQUIPMENT

During the operation of aviation equipment, is carried out a set of works concerning the support and renewal of its serviceability and efficient condition, if necessary and possible. These tasks are solved with the help of information systems during aviation equipment maintenance. If necessary and possible, during the aviation equipment operation, is carried out a work package concerning the support and renewal, of its operative and serviceable condition. These tasks are solved with the help of IT solutions during the aviation equipment maintenance. Aircraft maintenance is an important component of the aviation system which ensures the functioning of aviation throughout the world. Insofar as the air traffic performance grows, and the tough requirements for maintaining the schedule of commercial flights necessitate the need to increase the intensity of aircraft usage. Also is continued the toughening of requirements for the timeliness of maintenance.

Determination of Cell Permeabilization and Beta-Galactosidase Extraction from Aspergillus oryzae CCT 0977 Grown in Cheese Whey

Aspergillus oryzae grown in cheese whey has the ability to produce beta-galactosidase. The objective of this work was to define the parameters for the determination of cell permeabilization and extraction of the enzyme from Aspergillus oryzae CCT 0977 biomass, with high enzymatic activity. The Box–Behnken design was used to determine cell permeabilization and extraction of beta-galactosidase conditions. The fermentation was carried out for a period of 5 days at 28°C, having as substrate the deproteinized cheese whey. To determine the effect of the variables on beta-galactosidase activity, enzymatic activity was determined by the lactose hydrolysis reaction. The most efficient condition for cell permeabilization was 25% ethanol at 30°C for 90 min, obtaining an enzymatic activity of 0.44 U·mL−1. For beta-galactosidase extraction from the biomass, the most efficient condition was 5.3% chloroform at 48°C, with an enzymatic activity of 0.17 U·mL−1. The use of ethanol was most efficient to promote cell permeability of Aspergillus oryzae CCT 0977.

On the Interaction of Inclusion Dependencies with Independence Atoms

Inclusion dependencies are one of the most important database constraints. In isolation their finite and unrestricted implication problems coincide, are finitely axiomatizable, PSPACE-complete, and fixed-parameter tractable in their arity. In contrast, finite and unrestricted implication problems for the combined class of functional and inclusion de- pendencies deviate from one another and are each undecidable. The same holds true for the class of embedded multivalued dependencies. An important embedded tractable fragment of embedded multivalued dependencies are independence atoms. These stipulate independence between two attribute sets in the sense that for every two tuples there is a third tuple that agrees with the first tuple on the first attribute set and with the second tuple on the second attribute set. For independence atoms, their finite and unrestricted implication problems coincide, are finitely axiomatizable, and decidable in cubic time. In this article, we study the implication problems of the combined class of independence atoms and inclusion dependencies. We show that their finite and unrestricted implication problems coincide, are finitely axiomatizable, PSPACE-complete, and fixed-parameter tractable in their arity. Hence, significant expressivity is gained without sacrificing any of the desirable properties that inclusion dependencies have in isolation. Finally, we establish an efficient condition that is sufficient for independence atoms and inclusion dependencies not to inter- act. The condition ensures that we can apply known algorithms for deciding implication of the individual classes of independence atoms and inclusion dependencies, respectively, to decide implication for an input that combines both individual classes.

FAKTOR-FAKTOR YANG MEMPENGARUHI PRODUKSI SAWI DI DESA MAHARATU KECAMATAN MARPOYAN DAMAI KOTA PEKANBARU

The most people in Indonesia depend of the live at agriculture sector. The vegetables are one of agriculture comodity can to give big contribute to economy if attemted optimally. The efforts of improvement the vegetable production influenced by factors are environment (climate, soil, etc), production facility (seed, fertilizer, pesticide), capital and human resources. The research aim are to analyze influence of production factors to vegetable produce and analyze of allocation efficiency of production factors using to mustard farm. This research was conducted in the Maharatu Village Marpoyan Damai Subdistrict using the purposive sampling method with 40 mustard farmers. The results showed that production of mustard influenced by the seed, manure, urea, NPK, pesticide and labor with belief level 99 %. Score of MPP for all production variable showed that must add volume of production factors to increase mustard production. NPM/px value for seed and urea manure is big than 1 that mean the farmers can be add volume of production factors. For NPK manure, pesticide and labor must not be increasing because value of NPM/px is small than 1 to reach efficient condition economically and get optimally benefit.

Synthesis of metapristone through an efficient N-demethylation of mifepristone

An improved and efficient condition of N-demethylation of mifepristone in an excellent yield is described.