Materials Literature
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P MR spectroscopy and to estimate the ratio between the peaks of the main metabolites and intracellular pH of the healthy brain tissue of 23 volunteers in the age group under 30 years old in clinical settings. Based on the recorded stable phosphorus spectra of metabolites of the healthy brain tissue, the value of intr…
Removal of excessive ammonium nitrogen (NH + 4-N) from aqueous solution has been of considerable concern for several decades.It can be removed by air stripping, a necessary prerequisite is adding enough alkali.This study presented the first attempt to investigate the potential use of ceramsite coated with magnesium hy…
Propagation and behavior of fatigue cracks are governed by strain fields in the vicinity of the crack tip. The numerical description of strains in the crack tip presents some challenges in the modelling by the multiscale involved in the fracture analysis. In this study, it is proposed a 2D finite element analysis cond…
Lifetime of MAR-M 247 Ni-based superalloy was experimentally studied under high-frequency cyclic loading (120 Hz) with constant tensile mean stress σm = 300 MPa at temperature 900 °C in air. The stress amplitude σa was changed in order to investigate the superalloy lifetime in a wide range of conditions, from pure cre…
The primary goal of the study herein presented was to evaluate the remaining strength of a stiffened panel belonging to a ship’s deck that suffered some deformations during service. For this purpose, some representative panels of the ship were modelled, aiming to simulate a range of typical deformations, from the ones…
Rocket motor propellant grain, cast or bonded into the motor chamber or solid coating, is exposed to various loads during its service life. Rocket propellant is a viscoelastic material, whose mechanical properties strongly depend on temperature and strain rate. Application of cyclic loads, primarily thermal, onto a ro…
Improving the efficiency of a gas-fueled ship power plant using a Waste Heat Recovery metal hydride system / O. Cherednichenko, M. Tkach, B. Timoshevskiy, V. Havrysh, S. Dotsenko // Scientific Journals of the Maritime University of Szczecin. – 2019. – No 59 (131). – Р. 9–15.
The effect of freestream nuclei content on stable cavitation about a hydrofoil and subsequent microbubble production in the wake is investigated experimentally. Microbubble concentrations are measured upstream and downstream of the hydrofoil for four upstream nuclei concentrations and three cavitation numbers. For eac…
Welding residual stresses are determined by algebraic summation of stresses by the effect of external loading and can have a significant impact on the performance of welded joints. The present article examines the effect of residual welding stress on the destruction of circumferential butt welds of the gas pipeline se…
Abstract Soot prediction for diesel engines is a very important aspect of internal combustion engine emissions research, especially nowadays with very strict emission norms. Computational Fluid Dynamics (CFD) is often used in this research and optimisation of CFD models in terms of a trade-off between accuracy and com…
Rolling edge crack of 5052 aluminum alloy under one-pass (reductions of 35%, 40%, 50%, 60%, respectively) and multi-pass rolling at total reductions of 60% (two-pass, three-pass, four-pass and five-pass, respectively) at room temperature was analyzed by numerical simulation combined with experiments. Through the simul…
Thin films of copper zinc tin sulphide (CZTS) have been deposited on glass substrate at various solution concentration and angular speed using sol-gel spin coating technique. Surface morphology showed that the deposited layers are continuous and pinhole free. The film’s particles are evenly distributed and adhered fir…
Perceptual sensitivity of the skin depends on skin deformation. Conventionally, perceptual sensitivity and skin deformation are measured independently. So, it is difficult to investigate the direct relationship between skin sensitivity and mechanical properties. In this study, we propose a method to realize simultaneo…
Findings from the International Agency for Research on Cancer (IARC) classified particulate matter (PM) as carcinogenic to humans. While being a promising solution to reduce greenhouse gases (GHG) emissions and increase engine fuel economy, Gasoline Direct Injected (GDI) engines produce a number of particles (PN) of f…
In this work, sodium nitrate (NaNO3) is used as the basic continuous PCM, and magnesium oxide (MgO) is dispersed inside it to enhance its global thermal storage properties, especially its thermal conductivity. The composite (NaNO3/MgO) was prepared by mixing sodium nitrate with the addition of 1 wt.%, 2 wt.%, and 3 wt…
Radiation protection principles may be specified within three parameters, limiting time, distance and shielding, the aim of this work is to make a shield for neutrons that we got from Am- Be source, the neutrons will be fast with energy of (5MeV), researchers designed exposure system that contain the source and the sh…
The healing of skin wounds involves various factors including keratinocytes, fibroblasts, extracellular matrix, nervous and vascular components of the surrounding tissue. During wound healing, keratinocytes migrate from basal area to cover the lesion area. The important role of keratinocytes in skin regeneration trigg…
Titanium has been used for biomedical devices due to its excellent biocompatibility, which is based partly on its 2-8 nm thick titanium oxide layer. However, the relatively poor surface hardness, wear resistance and metal release of these layers may cause some problems in clinical application. In this study, titanium…
Silicon fibers were synthesized by a novel CVD method including in the interaction of aluminum monofluoride with silicon oxide, the final product containing nanofibers in an amount of 15 wt. %. The possibility of selective reduction of silicon oxide from the chamotte refractory plate was also demonstrated. Si was char…
This article deals with the use of silica fume and ways of its activation to modify the structure of cement stone and concrete on its basis. With regard to any type of filler, namely silica fume, questions that are relevant: how to enter and how many, what mechanisms are involved in the process of structure formation,…