Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"ISO standards"”.
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Sound Absorption and Sound Power Measurements in Reverberation Chambers Using Energy Density Methods
… pressure, using methods outlined in current ISO standards, by describing several experimental and analytical results.
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The design and performance of a low-cost inflatable wheelchair seat cushion
… and performance tests as outlined in the ISO standards regarding wheelchair seat cushions. Ten tests were conducted on the Loop prototype, including accelerated aging, interface pressure mapping, hysteresis, impact damping, loaded contour depth, envelopment, 10% force deflection, …
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Design and validation of high speed active trailer steering system for articulated heavy vehicle
… of the A-train double at highway speed, ISO standards have proposed the rearward amplification (RA) measures to characterizing the performance. It has been reported that the RA curves obtained through three different methods proposed by ISO-14791 differ. This thesis studies three proposed …
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Quantifying Coordinate Uncertainty Fields in Coupled Spatial Measurement systems
… interactions between the measurement sets. ISO standards, ANSI standards, and others, require that estimates of uncertainty accompany all measurement data. This research presents methods for quantifying the uncertainty fields associated with coupled spatial measurement systems. The …
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Fatigue life modelling of anisotropic styrenic block copolymers for a prosthetic heart valve application
… a fatigue lifetime prediction model for anisotropic styrenic block copolymers. A shortlist of cylinder forming block copolymers has been tested for a flexible leaflet aortic prosthetic heart valve, designed to mimic the native structure of the aortic leaflet. Polymeric valves have the …
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Numerically generating topology of the liner finish in internal combustion engines
… developed a quantitative relation between two ISO standards describing the honed liner finish, so that the manufacturing industry can use the surface generation method in convenience. Second, attempts were made to simulate the break-in processes for honed liner finish. Measured and numerically …
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Investigation on quantitative assessment of energy consumption and the associated sustainability performance of CNC milling machines
… and supported by the development of latest ISO standards such as ISO 14000, ISO 20140, ISO/TC 39/SC 2, N1760 and ISO 14955 for this cause. Therefore, developing a comprehensive methodological approach for quantitative analysis of energy consumptions and the associated sustainability aspects …
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Perioperative comparison of the agreement between a portable fingertip pulse oximeter vs. a conventional bedside pulse oximeter in adult patients (COMFORT trial)
… and the public. They are often not tested to ISO standards, or only undergo accuracy studies in healthy volunteers under ideal laboratory conditions. This study aims to pragmatically evaluate the agreement between one such device and a conventional bedside pulse oximeter in a clinical setting, …
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Analysis and design of an adjustable bone plate for mandibular fracture fixation
… of the modified bone plate. Current ASTM and ISO standards for bone plate testing require forces to be applied to the faces of the bone plate, orthogonal to the direction of loading experienced in vivo. This condition is applicable to long bones such as the humerus or femur, however loading …
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The effect of filler on the mechanical properties of a novel resin-based calcium phosphate cement
… depth of cure was determined according to the ISO standards for dental resin 4049 using the scrapping technique. Knoop hardness numbers were obtained by a microhardness tester (M-400; Leco Co., St. Joseph, MI). The viscosities of the experimental resin were determined in a viscometer (DV-II+ …
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The uncertainty in standardised sound power measurements: complying with ISO 17025
… area concerning with noise measurement many standards are available but without an expression of uncertainty, it is impossible to judge whether two results are in compliance or not. ISO/IEC 17025 is an international standard related with the competence of calibration and testing laboratories. …
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Design and development of an electrospun polymeric transcatheter heart valve for tissue engineering
… obtained for the PEL valves were well within ISO standards (EOA > 1.25 cm2 , mean pressure gradient < 10mmHg, and RF < 20% at a cardiac output of 5 l/min). In the current embodiments, DP valves (N=14) were not able to withstand aortic pressures but demonstrated good hydrodynamic function at …
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DT-DNA: Devising a DNA Paradigm for Modeling Health Digital Twins
… on micro, meso and macro levels using two ISO standards: ISO/IEEE 11073 (X73) and ISO 37120. To achieve our goal, we started by analyzing the biological DNA model and the influencing factors shaping health in smart cities. The purpose of the first is to highlight the DNA model features …
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A proposed framework that enhances the quality of cyber security audits
… chapter members. The National Institute of Standards and Technology (NIST) cyber security framework was found to be the widely adopted framework followed by the International Organization for Standardization (ISO) standards, with the Control Objectives for Information Technologies (COBIT) …
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The applicability of quality management to the field of web-enhanced learning in higher education institutions
… The technique used in combining the existing ISO standards upon which to base the WEL QMS procedural instance is repeatable and a methodological contribution. Procedures can be adopted and customized for similar higher education institutions: The process of a proposed Quality Management System …
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Has the Nigerian oil and gas local content development policy had any impact on the indigenisation of employment and job creation? A stakeholder analysis
… training upon employment. Ascension to supervisory and managerial positions was mainly attributed to on-the-job experience acquired over time; • ‘Payment’ for LCD: This is a joint responsibility with all the stakeholders’ contribution to be seen as necessary yet singularly insufficient to pay …
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A proposed project risk management framework in the information technology environment
… Shareholders require transparency and high standards of corporate governance that must therefore function in an environment that cultivate open communication channels. Shareholder value will be delivered by means of information that is applied through effective knowledge management …
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Harakeke fibre as reinforcement in epoxy matrix composites and its hybridisation with hemp fibre
… and composites were tested following ASTM and ISO standards. The surfaces of fibres and fracture surfaces of composites were assessed microscopically using optical microscopes and scanning electron microscope (SEM). Short harakeke and hemp fibres were alkali treated at elevated temperatures in …
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Certifikace Metrologické laboratoře
… laboratoře. Jsou zde rozebrané jednotlivé ISO normy (9000, 9001, 9004, 19011) potřebné pro certifikaci firmy. Dále je v této práci zpracovaná příručka jakosti pro metrologickou laboratoř firmy ALFA. Následně zde zpracovávám harmonogram pro kalibraci přístrojů v programu Excel a automatickým …
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