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Showing 1 to 20 of 20 for “"American Society for Testing and Materials (ASTM)"”.
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A CFD study of fuel evaporation and related thermofluid dynamics in the inlet manifold, port and cylinder of the CFR octane engine
… different test conditions as prescribed by the American Society for Testing and Materials (ASTM) for Research Octane Number (RON) and Motor Octane Number (MON) ratings. Recent research has been focused on determining whether the numerical difference between RON and MON, known as Octane …
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Geotechnical investigation of Montrose wetland site
… the geotechnical characteristics of the site and to aid in the creation of a proposed engineered wetland at Montrose, West Virginia. The tests performed in the laboratory to obtain the soil properties were: water content, Atterberg limits (liquid and plastic limits), grain size (sieve analysis …
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Controlled Oxidation Studies of Coal/Refuse Fuel Blends
… the controlled combustion of blends of biomass materials and coals was conducted. Crushed limestone was added to the blends as an absorbent for sulfur oxides. The samples were combusted in quartz-fiber crucibles in a forced air furnace. Combustion at different times and temperatures were …
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Evaluation of textile fabric properties utilized in foam-in-place head restraints
<p>The purpose of this research was to evaluate and compare the physical properties of knitted fabrics in bilaminate and trilaminate composite forms used in Foam-In-Place (FIP) manufacturing technology for automotive applications. Seven physical tests employed by the automotive industry to evaluate …
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Beam characterization at the neutron radiography reactor
… flux profile, energy spectrum, image quality, and beam divergence, is vital for producing quality radiographic images. This thesis characterized the east neutron imaging beamline at the Idaho National Laboratory Neutron Radiography Reactor (NRAD). The experiments which measured the beam's …
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MRI Safety Concerns: Anatomy Impacts on Radiofrequency Induced Heating and Implant Impacts on Gradient Induced Peripheral Nerve Stimulation
… technology but there are some safety concerns for patients. Radiofrequency (RF) induced heating and gradient induced peripheral nerve stimulation (PNS) are two typical safety concerns. Although many literatures have found the importance of them, they are not fully investigated. In this …
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Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks
… which are inconsistent in the mean hardness and hardness uniformity. In this thesis, the sources of variation in the mean hardness and hardness uniformity of the test blocks are identified by means of metallurgical study and Design of Experiments methodology. The uniformity of temperature …
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Lead-Free Gunshot Residues as Forensic Evidence
<p>The analysis of gunshot residue (GSR) has been forensically relevant for many years and several methods are well characterized in scientific literature. However, the manufacture and distribution of lead-free alternatives to small caliber firearms ammunition is increasing rapidly as these types …
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Comparing flexural strength of acrylic processed by three different techniques
… There are many predisposing clinical factors for these denture fractures. Specifically, acrylic resin fractures due to poor flexural strength has historical been a problem with complete denture.;Objective: The purpose of this in vitro study was to measure and compare the flexural strength of …
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Performance of Concrete Bridge Deck Joints
… was to identify the types of joints available for use on concrete bridge decks and to investigate the performance characteristics of each type, including primary functions and movement ranges. Eleven reports on joint performance published by state departments of transportation and universities …
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Improvement of a cell-based test system for the biological assessment of plastics for use in single-use bioreactors
… due to their manifold advantages. Therefore, the demand for biocompatible SU materials is increasing to ensure consistent cell growth and patient safety. Biocompatibility must be demonstrated according to USP <87> and ISO 10993-5, respectively, before marketing. However, the standards …
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Methods and Strategies for Evaluating MRI Rf-Induced Heating for Implanted Metallic Stents
… of conductive implanted medical devices, and radio frequency (RF)-induced heating is one of the major concerns. As one of the general metallic implanted devices, however stents are not fully studied on its RF-induced heating behavior. In this work, evaluations of MRI RF-induced heating are …
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ASTM assessment of a novel shoulder prosthetic design: measurement of glenoid edge motion in three degrees of freedom
The most common cause for failure of An anatomical shoulder joint prosthesis is loosening of the glenoid component, widely attributed to ‘rocking' of the component under eccentric edge loading. The American Society for Testing and Materials (ASTM) set out a standardised test to evaluate glenoid …
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An Investigation of Anchor Nut Loosening and Review of Tightening Procedures for Anchor Rods in Highway Ancillary Structures
… as traffic signals, sign structures, luminaires, and high-mast light towers which are typically fastened to a concrete foundation using embedded anchor rods and anchor nuts. The inventory of ancillary structures across the United States is huge, and these structures vary dramatically in type, age, …
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Design and Development Towards a Novel Prosthesis for Total Shoulder Arthroplasty to Reduce Aseptic Glenoid Loosening
… solution, that helps in restoring the structural and functional integrity of a diseased glenohumeral (GH) joint with intact rotator-cuff. A 300% increase in the usage of TSA has been observed since 2007, along with 2.5% increase in revision rate. Aseptic glenoid loosening accounts for 37% of …
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Energy efficiency in office technology
… several issues relating to reducing energy use and improving energy efficiency of office equipment. Chapter 2 compares policies and programs in several European countries and the United States that could enhance the energy efficiency of office technology. Different programs are examined, …
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Analysis of air-void system in hardened concrete from a three-dimensional perspective
… air bubbles in the cement paste. When the volume and distribution of the entrained air is properly controlled, the microstructure is protected from pressure exerted by freezing water. ASTM C457 “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened …
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Advances in measuring parameters of the air-void system in hardened concrete
To improve the freezing and thawing resistance of concrete, air bubbles are entrained and distributed evenly and closely. Evaluation of the parameters of the air-void system in hardened concrete is detailed in ASTM C457 “Standard Test Method for Microscopical Determination of Parameters of the …
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Geo-tiles: manufacturing tiles from copper mine tailings using geopolymerisation
… the high temperature production process (>950°C) and its reliance on virgin raw material from natural reserves. Conventional solutions to manage the voluminous residue of the mining industry are also unsustainable as they do not comprehensively eliminate the hazards posed. This study investigated …
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Engineering geological characterization of volcanic rocks of ethiopian and sardinian highlands to be used as construction materials
… of volcanic rocks from Ethiopian and Sardinian highlands to be used as construction materials”. Though, the two project areas are geographically far apart, both are partly covered with volcanic rocks mainly consisting of basic and subordinate felsic rocks. The research was …