by Mariusz KSIĄŻEK

Received: 24 March 2021;  Published: 15 June 2021;  doi: 10.21926/rpm.2102024

Metal parts of endoprosthesis have a detrimental effect on the bones that come into contact with them and on the entire body of the patient. Coating them with biocompatible layers (hydroxyapatite and bioglass) has not yet brought about permanent results. In this study, the author showed the possibility of using a binder containing sulfur waste for this purpose. The sulfur binder is used industrially in electrical engineering and construction applications. The chemical properties of elemental sulfur indicate that it [...]

by Krzysztof Wierzcholski

Received: 08 October 2020;  Published: 02 June 2021;  doi: 10.21926/rpm.2102023

This paper aims to highlight the result of a new progression of mathematical estimation methods of stochastic bio-hydrodynamic lubrication parameters for arbitrary, curvilinear, non-rotational, co-operating, living biological surfaces coated with phospholipid bi-layers. Movable, non-rotational, co-operating surfaces occur in various biological friction nods like the collar bone, the blade bone, the jump joint, and the wrist joint. Specifically, the author presents a synthetic and comprehensive estimation of stochas [...]

by Pithchai Pandian Sivakumar  , Elke Gruyaert  , Nele De Belie  and Stijn Matthys

Received: 09 March 2021;  Published: 02 June 2021;  doi: 10.21926/rpm.2102022

Depending on the availability of aggregate sources pertaining to their geographic locations, the concrete industry utilizes conventional aggregates such as marine sand, dredged gravel, or crushed rocks. This method requires high energy and high processing costs for washing and grinding. The objective of this work is to use Modified Ferro silicate slag (MFS), a by-product obtained from the copper industry, as an alternative to the conventional fine aggregates found in mortar. No additional processing such as washing [...]

by Doo-Sung Lee

Received: 09 December 2020;  Published: 02 June 2021;  doi: 10.21926/rpm.2102021

This paper concerns a poroelastic half-space in which plane compressional waves are scattered by a spherical inclusion. Addition theorems for the spherical wave functions are utilized to meet the boundary conditions on the plane, and the satisfaction of the given conditions on the boundary of the sphere leads to three infinite series equations, whose solution can be acquired by successive approximations. Further, its existence and uniqueness are discussed.

by Christopher Wilson  , Anthenius Versluis  , Daranee Tantbirojn  and Martha Wells

Received: 10 February 2021;  Published: 28 May 2021;  doi: 10.21926/rpm.2102020

Prefabricated zirconia crowns (ZRCs) require a passive fit and more reduction than stainless steel crowns (SSC). To determine the mean and maximum reduction depths in the mesial-buccal and occlusal areas for three ZRC brands and one SSC in posterior primary typodont molars and to compare reduction depths to existing literature to determine the preparation’s proximity to pulpal tissue. Four primary maxillary and mandibular typodont teeth (J and S) were prepared according to the manufacturers’ guidelines for three ZR [...]

by Chris R. Lavers

Received: 29 December 2020;  Published: 14 May 2021;  doi: 10.21926/rpm.2102019

Advanced optical stealth techniques are of growing importance in the role of manned and unmanned aircraft or ship platforms. We consider here the concept of using passive reflective display elements rather than high power active light projection to achieve a low observable camouflaged ship platform. This paper presents practical consideration towards minimal radiated power user-driven requirements using adaptive liquid crystal electro-optical methods. Optical reflectivity for a multi-layer liquid crystal cell struc [...]

by Sampo Mäkikouri  , Sirje Vares  , Kirsi Korpijärvi  and Nikolaos Papakonstantinou

Received: 12 January 2021;  Published: 13 May 2021;  doi: 10.21926/rpm.2102018

Climate change has been identified as one of the biggest issues plaguing human life at present. Hence, immense attention is being paid to developing methods that can potentially reduce carbon dioxide emission. With the help of carbon-negative concrete, manufactured from alternative binders and cured with waste carbon dioxide, a major part of the manufacturing industries that emit carbon dioxide can be potentially turned into a carbon sink. In this study, the waste material streams in Finland, suitable for disposing [...]

by Pei-Yu Wu  , Kristina Mjörnell  , Claes Sandels  and Mikael Mangold

Received: 22 January 2021;  Published: 11 May 2021;  doi: 10.21926/rpm.2102017

Assessment of the presence of hazardous materials in buildings is essential for improving material recyclability, increasing working safety, and lowering the risk of unforeseen cost and delay in demolition. In light of these aspects, machine learning has been viewed as a promising approach to complement environmental investigations and quantify the risk of finding hazardous materials in buildings. In view of the increasing number of related studies, this article aims to review the research status of hazardous mater [...]

by Aurélie Laborel-Préneron  , Paulina Faria  , Jean-Emmanuel Aubert  and Camille Magniont

Received: 12 March 2021;  Published: 07 May 2021;  doi: 10.21926/rpm.2102016

Bio-based earth composites present various environmental benefits, such as usable wastes, coproducts, abundant or renewable materials, etc. Moreover, the incorporation of bioaggregates in the earth matrix allows the buildings to act as an effective carbon sink. A growing number of studies are now focusing on the mechanical and hygrothermal properties of bio-based earth building materials. However, the durability of these types of material is a major concern, and knowledge of their various aspects is essential to an [...]

by Carlos A. Echeverry-Gonzalez  and Vladimir V. Kouznetsov

Received: 01 December 2020;  Published: 28 April 2021;  doi: 10.21926/rpm.2102015

The design of nanomaterials for application in diverse fields ranging from photovoltaic to fluorescence sensing is a research area of increasing interest. Recently, Quantum Dots (QDs), which are classified as semiconductor quantum dots (SQDs) and Carbon dots (CDs), have become a hot topic of investigation, owing to their extraordinary tunable fluorescence emission properties that render them excellent candidates for sensing metal ions. The detection of metal ions in aqueous solutions with high sensitivity is very i [...]