Rapid Prototyping at Zero Gravity for In-Flight Repairs and Fabrication on Space Station Freedom

The ability to perform in-flight rapid prototyping would be of great benefit to NASA in two ways. First, repair parts could be fabricated from CAD designs beamed up from earth based laboratories which might allow a failed experiment to proceed. The mission specialists themselves, under the creative influence of space flight, might design a new part or tool and fabricate it on board in a matter of hours. Second, with metal casting and ceramic sintering facilities on board, rapid prototyping would allow manufacturing in space. This paper presents some test criteria for evaluating two of the rapid prototyping techniques, stereolithography and fused deposition, in microgravity conditions. Effects of the variation of head speed and strip width for the fused deposition process on the resulting mechanical properties are presented. The mechanical strength of the polyamide test bars increased with both increasing head speed and strip width. Increasing head speed would be desirable in microgravity applications.Mechanical Engineerin

The relation of dissolved oxygen to the stability of sewage

Thesis (M.S.)--University of Illinois, 1914.Typescript.Includes bibliographical references

Orphans of British Fiction, 1880-1911

Orphans of British Fiction, 1880-1911 Abstract William David Floyd Orphans of British Fiction, 1880-1911 focuses on the depiction of orphans in genre fiction of the Victorian fin-de-siecle. The overwhelming majority of criticism focusing on orphans centers particularly on the form as an early- to middle-century convention, primarily found in realist and domestic works; in effect, the non-traditional, aberrant, at times Gothic orphan of the fin-de-siecle has been largely overlooked, if not denied outright. This oversight has given rise to the need for a study of this potent cultural figure as it pertains to preoccupations characteristic of the turn of the century. The term “orphan” may typically elicit images of the Dickensian type, such as Oliver Twist, the homeless waif with no family or fortune with which he or she may discern identity and totality of self. The earlier-century portrayals of orphanhood that produced this stereotype dealt almost exclusively with issues arising from industrialization, such as class affiliation, economic disparity and social reform and were often informed by the cult of the ideal Victorian family. Beginning with an overview of orphanhood as presented in earlier fiction of the long nineteenth century, including its metaphorical import and the conventions associated with it, Orphans of British Literature, 1880-1911 goes on to examine the notable variance in literary orphans in genre fiction at the turn of the century. Indicators of the zeitgeist of modernism’s advent, turn-of-the-century orphans functioned as registers of burgeoning cultural anxieties particular to the fin-de-siecle, such as sexual ambiguity, moral and physical degeneration and concerns about the imperial enterprise. Furthermore, toward the century’s end, the notion of the ideal family fell under suspicion and was even criticized as limiting and oppressive rather than reliable and inclusive, casting into doubt the institution to which the orphan historically aspired and through which the orphan state was typically rectified. As a result, in contrast to the sentimental street urchin of early and middle century fiction, fin-de-siecle orphans are often unsettling, irresolute, even monstrous and violent figures

The relation of the mineral content of boiler waters to that of the scale formed

Thesis (B.S.)--University of Illinois, 1912.Typescript