Matching Items (2)

Vida Sin Agua: Vanishing Water in the Valley of the Sun

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The Colorado River is the lifeblood for seven Basin States including Colorado, Utah, Wyoming, New Mexico, Arizona, California and Nevada. This water source aided westward expansion and allowed the arid

The Colorado River is the lifeblood for seven Basin States including Colorado, Utah, Wyoming, New Mexico, Arizona, California and Nevada. This water source aided westward expansion and allowed the arid Southwest to grow. Today, the river is over-allocated resulting in reduced flows. This could lead to water challenges in Arizona and the other Basin states. This river is the single largest entity from which Arizona receives water. Despite this, Arizona is still better situated for water cutbacks than other states like California. Arizona has more than nine million acre-feet of banked underground water and access to other water sources including the Salt and Verde rivers. Government officials are making decisions now that will affect water usage in Arizona for decades and generations to come. Digital media, such as iPad magazines are a good way to reach this technologically savvy generation and engage them concerning important issues. Designing for digital platforms presents unique opportunities. This platform requires solid content and visually appealing design to attract a Millennial audience born between the years 1981 and 1996, according to Pew Research Center. Digital magazines currently present a small segment of the media market, however this segment is growing exponentially. A study by Pew Research Center reports that this slice of the population is interested in consuming the news and emerging technologies such as digital magazines. These are good ways to reach and interest a digitally engaged readership. Reaching this age group is important because the Millennial generation will need to determine the future of the Colorado River and water use in Arizona. To ensure the future of water in the West, this generation needs to "learn about the reality of our water supply, what our real water challenges are and then get engaged and have a voice in what we do about our water planning for the future" (Porter, 2015). DISCLAIMER: The digital magazine was created in InDesign with interactive PDFs, which are best viewed on tablets. Screenshots of the magazine are included to demonstrate the magazine.

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  • 2016-05

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Automating GD&T schema for mechanical assemblies

Description

Parts are always manufactured with deviations from their nominal geometry due to many reasons such as inherent inaccuracies in the machine tools and environmental conditions. It is a designer job

Parts are always manufactured with deviations from their nominal geometry due to many reasons such as inherent inaccuracies in the machine tools and environmental conditions. It is a designer job to devise a proper tolerance scheme to allow reasonable freedom to a manufacturer for imperfections without compromising performance. It takes years of experience and strong practical knowledge of the device function, manufacturing process and GD&T standards for a designer to create a good tolerance scheme. There is almost no theoretical resource to help designers in GD&T synthesis. As a result, designers often create inconsistent and incomplete tolerance schemes that lead to high assembly scrap rates. Auto-Tolerancing project was started in the Design Automation Lab (DAL) to investigate the degree to which tolerance synthesis can be automated. Tolerance synthesis includes tolerance schema generation (sans tolerance values) and tolerance value allocation. This thesis aims to address the tolerance schema generation. To develop an automated tolerance schema synthesis toolset, to-be-toleranced features need to be identified, required tolerance types should be determined, a scheme for computer representation of the GD&T information need to be developed, sequence of control should be identified, and a procedure for creating datum reference frames (DRFs) should be developed. The first three steps define the architecture of the tolerance schema generation module while the last two steps setup a base to create a proper tolerance scheme with the help of GD&T good practice rules obtained from experts. The GD&T scheme recommended by this module is used by the tolerance value allocation/analysis module to complete the process of automated tolerance synthesis. Various test cases are studied to verify the suitability of this module. The results show that software-generated schemas are proper enough to address the assemblability issues (first order tolerancing). Since this novel technology is at its initial stage of development, performing further researches and case studies will definitely help to improve the software for making more comprehensive tolerance schemas that cover design intent (second order tolerancing) and cost optimization (third order tolerancing).

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Date Created
  • 2016