This paper develops and applies a methodology for multicriteria risk assessment aiming to overcome the limitations of the conventional failure mode and effect analysis where risk evaluation is performed at the higher level consideration of occurrence, severity, and detection. Breaking down these higher level criteria into a set of parameters and variables makes it possible to analyse in greater detail the physical, environmental, and process conditions of the components in response to the activities of factors of biological, chemical, and mechanical stresses. By adopting a framework comprising multicriteria decision analysis, Delphi method, nominal group technique, and technique for order of preference by similarity to ideal solution, the fidelity, transparency, and repeatability of the assessment are ensured. The highlight of the paper is the demonstration of the capability of the model for time dependent assessment, which allows the comparison between different states of the asset's conditions through alteration in the risk profiles. The analysis conducted shows the efficient applicability of the method for the reference case study of an offshore oil and gas support structure, proving its relevance for systems of similar class.
This research work deals with the development of incubator powered by steam generated from boiled water in which the inner components and micro – controller are powered by solar system. The eggs incubator is designed to be powered by steam source of energy. The materials selected for the fabrication of the incubator were, plywood, Aluminum foil, Gas cylinder and aluminum condenser pipe. The wood was coated with aluminum foil inside in order to prevent heat loss, the six electric bulbs were introduced to complement the heat when the major source was down and three (3) D.C fans of 1.3A rating each for uniform distribution and circulating of heat. All these components were controlled by an integrated micro-controller circuit by sensing and processing the data (Temperature and Humidity). The Temperature, Humidity and egg turning mechanism were controlled and regulated by configuring micro-controller based on the operating conditions of the incubator. The performance evaluation of the designed incubating machine was tested for the period of 18-28 days. The incubating temperature range of (37-39°C) was maintained throughout the incubating period, and the relative humidity ranged from 45% to 60% was also maintained.
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