Matching Items (1,065)
Filtering by

Clear all filters

152797-Thumbnail Image.png
Description
There has been considerable advancement in the algae research field to move algae production for biofuels and bio-products forward to become commercially viable. However, there is one key element that humans cannot control, the natural externalities that impact production. An algae cultivation system is similar to agricultural crop farming practices.

There has been considerable advancement in the algae research field to move algae production for biofuels and bio-products forward to become commercially viable. However, there is one key element that humans cannot control, the natural externalities that impact production. An algae cultivation system is similar to agricultural crop farming practices. Algae are grown on an area of land for a certain time period with the aim of harvesting the biomass produced. One of the advantages of using algae biomass is that it can be used as a source of energy in the form of biofuels. Major advances in algae research and development practices have led to new knowledge about the remarkable potential of algae to serve as a sustainable source of biofuel. The challenge is to make the price of biofuels from algae cost-competitive with the price of petroleum-based fuels. The scope of this research was to design a concept for an automated system to control specific externalities and determine if integrating the system in an algae cultivation system could improve the algae biomass production process. This research required the installation and evaluation of an algae cultivation process, components selection and computer software programming for an automated system. The results from the automated system based on continuous real time monitored variables validated that the developed system contributes insights otherwise not detected from a manual measurement approach. The implications of this research may lead to technology that can be used as a base model to further improve algae cultivation systems.
ContributorsPuruhito, Emil (Author) / Sommerfeld, Milton (Thesis advisor) / Gintz, Jerry (Thesis advisor) / Alford, Eddie (Committee member) / Arizona State University (Publisher)
Created2014
150573-Thumbnail Image.png
Description
This report presents the effects and analysis of the effects of Pulsed-Gas Metal Arc Welding's (P-GMAW) on Lean Duplex stainless steel. Although the welding of Duplex and Super Duplex Stainless steels have been well documented in both the laboratory and construction industry, the use of Lean Duplex has not. The

This report presents the effects and analysis of the effects of Pulsed-Gas Metal Arc Welding's (P-GMAW) on Lean Duplex stainless steel. Although the welding of Duplex and Super Duplex Stainless steels have been well documented in both the laboratory and construction industry, the use of Lean Duplex has not. The purpose for conducting this research is to ensure that the correct Ferrite-Austenite phase balance along with the correct welding procedures are used in the creation of reactor cores for new construction nuclear power generation stations. In this project the effects of Lincoln Electrics ER-2209 GMAW wire are studied. Suggestions and improvements to the welding process are then proposed in order to increase the weldability, strength, gas selection, and ferrite count. The weldability will be measured using X-Ray photography in order to determine if any inclusions, lack of fusion, or voids are found post welding, along with welder feedback. The ferritic point count method in accordance with ASTM A562-08, is employed so that the amount of ferrite and austenite can be calculated in the same manor that is currently being used in industry. These will then be correlated to the tensile strength and impact toughness in the heat-affected zone (HAZ) of the weld based on the ASTM A923 testing method.
ContributorsCarter, Roger (Author) / Rogers, Bradley (Thesis advisor) / Gintz, Jerry (Committee member) / Georgeou, Trian (Committee member) / Arizona State University (Publisher)
Created2012
133940-Thumbnail Image.png
Description
Motion simulators are a common feature in everything from high end science museums to amusement parks, allowing a full ride experience on a small footprint and at a comparatively low cost relative to full size rides. The rapidly advancing field of virtual reality provides a potential increase in this desire

Motion simulators are a common feature in everything from high end science museums to amusement parks, allowing a full ride experience on a small footprint and at a comparatively low cost relative to full size rides. The rapidly advancing field of virtual reality provides a potential increase in this desire for motion simulators, by combing virtual reality with motion simulation, total immersions can be created that is competitive with theme parks. While there exists a small number of commercially available consumer motion simulators, these tend to not have a wide enough range of motion to provide flexibility for use cases. This report is the documentation of an attempt to create a low cost consumer grade motion simulator prototype to determine to what extent an adequate motion simulation experience can be created in the home environment. This design made use of a two degree of freedom platform mounted on a universal joint as a trade off between flexibility of use and affordability of the end product. Ultimately, although the design and motor selection was sound, structural issues prevented the design from being capable of withstanding the necessary forces. However, as a prototype, important lessons were learned that could apply to a better-constructed second generation design. The results definitely show that motion simulators will, in the near future, become feasible for in-home amusement park recreation, at least for some amusement park rides.
ContributorsMiller, Alec Michael (Author) / Sodemann, Angela (Thesis director) / Gintz, Jerry (Committee member) / Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05