2,534 research outputs found

    The Alcoa ram fastener: A reusable blind rivet

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    Results of tensile, shear, fatigue and accelerated weathering tests are presented for the ram fastener, a reusable, single unit blind rivet. The effects of variations in hole size, grip length and sheet thickness on strength properties of the fastener were determined. The test results show these fasteners to have strength characteristics suitable for light structural applications. Exposure to accelerated weathering did not impair their performance

    Aquatic Macroinvertebrates of "Bray Creek" and "Frog Alley", Two Unnamed Agricultural Drainages in the Upper Mackinaw River Drainage

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    Final Report issued June 30, 2005Report issued on: June 30, 2005INHS Technical Report prepared for Dr. Maria Lemke, Illinois Chapter, Nature Conservanc

    To my legs / Brussels, Belgium #1

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    High temperature epsilon-near-zero and epsilon-near-pole metamaterial emitters for thermophotovoltaics

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    We propose a method for engineering thermally excited far field electromagnetic radiation using epsilon-near-zero metamaterials and introduce a new class of artificial media: epsilon-near-pole metamaterials. We also introduce the concept of high temperature plasmonics as conventional metamaterial building blocks have relatively poor thermal stability. Using our approach, the angular nature, spectral position, and width of the thermal emission and optical absorption can be finely tuned for a variety of applications. In particular, we show that these metamaterial emitters near 1500 K can be used as part of thermophotovoltaic devices to surpass the full concentration Shockley-Queisser limit of 41%. Our work paves the way for high temperature thermal engineering applications of metamaterials.Comment: 15 pages, 8 figure

    Characterization of a space orbited incoherent fiber optic bundle

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    The results of a study performed to determine the effects of adverse space environments on a bundle of over 1800 optical fibers orbited for 69 months are reported. Experimental results are presented on an incoherent fiber optic bundle oriented in low Earth orbit aboard the Long Duration Exposure Facility (LDEF) satellite as part of the Space Environment Effects Experiment (M0006). Measurements were performed to determine if space induced radiation effects changed the fiber bundle characteristics. Data demonstrating the success of light transmitting fibers to withstand the adverse space environment are presented

    Condition of streams and other aquatic resources in Kane County Forest Preserve District parcels

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    Kane County Forest Preserve District Grant/Contract No: 2005-5291INHS Technical Report Prepared for Kane County Forest Preserve Distric

    Summer Ephemeroptera, Plecoptera, and Trichoptera (EPT) Species Richness and Community Structure in the Lower Illinois River Basin of Illinois

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    Ephemeroptera, Plecoptera, and Trichoptera (EPT) species richness is useful for monitoring stream health, but no published studies in Illinois quantitatively document EPT richness or assemblage structure. The objectives of this study were to characterize adult EPT richness and structure and relate these to relative water at eight stream sites (160-69,300 km3 area) in the lower Illinois River Adults were ultra-violet light trapped in June, July, and August 1997. Nutrient enrichment by nitrate and nitrite nitrogen was strongly evident, in smaller drainages, while critical loss of stable habitat was observed in water bodies. Seventy EPT species were identified from 17,889 specimens. Trichoptera were by far the most speciose (41 species), followed by Ephemeroptera (26), and Plecoptera (3). Caddisflies also dominated species richness across sites, contributing 18.0 of the average 28.9 total EPT species collected. Site EPT richness varied significantly (F =5.51, p 0.003, df 7), with smaller drainages supporting greater richness, generally. Differences were also evident for months (F = 21.7, p =0.0001, df =2), with June being lower (11.8 average) than either July (20.6) or August (18.1) values. Hilsenhoff biotic index (HBI) scores did not vary significantly across sites (F 0.7, p =0.7, df =7), but were different across months (F =5.4, p 0.02, df 2). June (4.23) and July (4.53) means were not different, but both were lower (of better quality) than August (5.33) scores. The relationship of EPT to HBI scores was not investigated statisti- cally due to problems of sample size and interdependance of monthly sam­ ples, but graphical analysis no consistent relationship. This sug- gested a decoupling of the the EPT and implied that the gain in taxonomic resolution achieved by adults outstripped the resolution of the HBI. Use of the HBI to characterize adult aquatic insect communities is discouraged. New state records and extensions for Ephemeroptera and Trichoptera are presented and loss of sensitive Plecoptera in the drainage is discussed

    Un Chien Andalou – An Orchestral Film Score

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    Dissertation advisor: Paul RudyVitaThesis (D.M.A.)--Conservatory of Music and Dance. University of Missouri--Kansas City, 2017Un Chien Andalou - An Orchestral Film Score, is a one-movement work for small orchestra composed as live accompaniment to the 1929 silent film Un Chien Andalou by Luis Buñuel and Salvador Dali. Several factors went into my decision to compose a soundtrack for this movie. It is a well known film and it is relatively short at 22 minutes, conditions conducive to increased performance possibilities. Being silent, it allows for continuous or nearly continuous music, so this soundtrack functions as a suite. The film contains numerous contrasting and bizarre scenarios and it boasts sudden shifts in tone and mood, offering opportunities to compose both empathetic and anempathetic music. Finally, the 2003 Filmoteca Español restoration returned the film to its correct frame rate, lengthening the duration from sixteen to twenty-two minutes and rendering unusable Buñuel’s original 1960 soundtrack (which consisted of excerpts from various Argentinian Tangos and a passage from Wagner’s Tristan und Isolde). My goal was to produce a score tailored for orchestras of modest size and ability, so few passages make virtuosic demands on the performers. Equally important was to make sure conductors could synchronize the performance: visual cues in the movie are carefully aligned with markers placed in the score. Eliminating the need for a click track means the score can be performed with only a copy of the movie and appropriate projection equipment. I also sought to avoid stylistic dissonance by relying principally on conventional musical tropes such as circus music, romantic themes, jazz and other recognizable styles. “Stylistic dissonance” indicates music composed in a style far enough removed from the film it is intended to accompany that its presence is anachronistic. Since most contemporary soundtracks created for this film are rife with stylistic dissonance, I wanted to create an alternative and more stylistically appropriate response. I created the score in four stages. I spotted the film to calculate all hit points and tempos, then composed a rough draft piano score that I later fleshed out and orchestrated. Finally, I edited the score, corrected mistakes and added small details.Abstract -- Acknowledgements -- Instrumentation -- Performance notes -- Score -- Vit
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