The article highlights the method of the ship systems pipelines manufacturing according to the drawings, regardless of the readiness of the object under construction. There has been emphasized the effectiveness of the method, which resulted in the reduced construction time of the vessel without additional operations, except for design work. The study aimed to eliminate the reasons limiting the application of the manufacturing method based on the design information, regardless of the readiness of the object under construction has been carried out. A scientific approach to determining the clearances sufficient for mounting pipelines, where the pipes are manufactured according to design dimensions, is presented. The sizes of tolerances and the reasons for setting them are analyzed and the measures on reducing or eliminating them are proposed. There is given the estimation of gaps big enough to fit any pipeline canal under consideration into the allocated corridors. The analysis of route deviations under mounting the ship pipeline systems at the design stage makes it possible to reduce the assigned clearances and to manufacture the pipes into the reserve later. The calculation and methodological base used in the design of pipeline routes for ship systems has been developed. The software AST-SUDOTRUB was developed to calculate the pipeline deviations that occur due to the errors in pipe manufacturing. The software automatically checks the sufficiency of controlled gaps in a particular point of the route studying the pipe deviation in the gap area. The study results prove the need to indicate the date of the start of routing in calculations and give the designer a tool for rational assigning the gaps

Statics of drying is based on the laws of interaction between the gas medium and the dehydration facility, which seek a thermodynamically equilibrium state. Jackfruit is a wet thermolabile material. With a static equilibrium between the product and the environment, the water content in a hygroscopic state depends on the type of the product, its energy, humidity, and a number of parameters, e.g. temperature and partial pressure of the vapor on the surface. The paper introduces graphical dependences of the activity of water of jackfruit slices on humidity at various ambient temperatures. The authors also give its analogy in semilogarithmic coordinates. It helped to define a range of humidity that determined the type of connection between the moisture of the object and the dry residue. The laws of the mechanism of heat and mass transfer are relevant in determining the dynamics of the dehydration process. Their study can help to intensify the process of moisture removal with rational operating parameters. The present study featured the equilibrium states in the system, which made it possible to find the driving force of moisture transfer and to evaluate the heat carrier potential, as well as to substantiate the values of the parameters and the environment during storage and transportation of the finished dry product. The value of relative moisture content in equilibrium was determined by isothermal sorption curves. The value depends on the pre-treatment of the drying object, the conditions of its contact with the external environment, as well as by the energy and type of relationship between the dry residue and the moisture. The empirical results were arranged in the form of graphical dependences, which made it possible to theoretically obtain their mathematical approximation. The equations of dependence between the equilibrium moisture content of the material and the relative humidity of the vapor-air medium included a lot of constants, which also needed to be determined empirically. The mathematical dependences approximate the isothermal sorption curves, i.e. the relationship between the product’s moisture and water activity indices. The dependences can be used to conduct a thermodynamic analysis of the sorption process and determine the free, bound, and internal energies of the process of moisture absorption by the capillary-porous object of study. The hygroscopic examination of jackfruit is also necessary when making design decisions for the rational implementation of technological operations, including the storage and transportation of dry jackfruit slices.

No abstract

The article touches upon the application of the numerical finite difference method for solving Navier-Stokes equation in case of one-dimensional problem of passing a cooled viscoelastic material inside circular nozzles. There have been analyzed the specific features of using the method and presented the results of its application. The object of study was not chosen at random, because viscous properties of raw gluten are variable and depend on the temperature, chemical composition and properties of the feedstock. Working not properly with the object of research (phenomenon, process), but with its model helps to characterize its properties and behavior in various situations relatively quickly and without significant costs. The need to identify patterns of internal heat and mass transfer, which is based on studying the kinetics of the process, is obvious for physic-mathematical modeling of heat and mass transfer processes of wheat gluten granulation, in particular, analyzing the mechanism of moisture removal during its drying under radiation power supply. The results of the conducted research are consistent with the available data on the subject, and the suggested approach to solving the problem of choosing rational hydrodynamic regimes has been applied due to the difficulty of experimental determining the velocity fields and problematic analyzing the system of hydrodynamic differential Navier-Stokes equations with variable proportionality ratios.

Precise diagnosis of the severity of dengue fever (DF) and its timely treatment reduce its mortality, but the sensitivity of clinical presentations is low for the classification of severity. Research on biomarkers is ongoing, and some studies in adults have shown the utility of C reactive protein (CRP) in the early diagnosis of dengue severity. However, the role of CRP in children with DF is still unknown. The aim of this study was to determine the value of CRP in distinguishing between DF and severe DF. A cross-sectional study was conducted from May 2016 to April 2017 at Children's Hospital 1 in Ho Chi Minh City, Vietnam. Serum CRP was tested on days 4 and 5 of the disease. Laboratory tests for DF were based on either a positivity for non-structured glycoprotein-1 antigen (NS1Ag) or enzyme-linked immunosorbent assay (ELISA) for immunoglobulin (Ig) M in acute phase serum. Among 270 patients, 29.6% had DF, 26.7% had DF with warning signs, and 43.7% had severe DF. The CRP level was measured in 123 patients on day 4 and 147 patients on day 5 of the illness. The median CRP level for DF was 2.4 mg/L, for DF with warning signs was 6.7 mg/L, and for severe DF was 7.3 mg/L. The CRP level was higher on day 4 than on day 5. The CRP level showed a statistically significant difference between the group with circulatory dysfunctions (p=0.02) or liver dysfunction (p= 0.04) and the other patients. The CRP cut-off point on day 4 that distinguished DF and severe DF was 5.8 mg/L and the area under the receiver operating characteristic curve (AUC) was 0.89, with a sensitivity of 82.9% and specificity of 80%. The CRP concentration in the early stage of illness may, therefore, help to distinguish between DF and severe DF.