285 research outputs found

    Working Effectively with Persons Who Are Hard of Hearing, Late-Deafened, or Deaf

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    This brochure on persons who are hard of hearing, late-deafened, or deaf and the Americans with Disability Act (ADA) is one of a series on human resources practices and workplace accommodations for persons with disabilities edited by Susanne M. Bruyère, Ph.D., CRC, SPHR, Director, Program on Employment and Disability, School of Industrial and Labor Relations – Extension Division, Cornell University. Cornell University was funded in the early 1990’s by the U.S. Department of Education National Institute on Disability and Rehabilitation Research as a National Materials Development Project on the employment provisions (Title I) of the ADA (Grant #H133D10155). These updates, and the development of new brochures, have been funded by Cornell’s Program on Employment and Disability, the Pacific Disability and Business Technical Assistance Center, and other supporters

    Doctor of Philosophy

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    dissertationThe electrochemical properties of actinides in molten salt are of importance in the nuclear pyrochemical material processing. Specifically, the ability to perform fast (real-time) concentration monitoring in such environments is of great importance (and currently not developed). This dissertation aims to develop such concentration monitoring tools that could be applied to either Generation IV nuclear reactor systems, or to spent fuel pyroprocessing. The application in Generation IV systems is treated in the first part of the dissertation. Here, fluoride salts containing thorium and uranium have been investigated using an electrochemical technique called cyclic voltammetry. Signal to concentration correlations have been developed for single-analyte and mixed salts, and other electrochemical data were collected (reduction mechanism, reversibility criteria, diffusion coefficient). The application in spent fuel pyroprocessing is treated in the second part of the dissertation. Here, chloride salts containing thorium and uranium have been investigated using a variety of electrodeposition techniques (chronoamperometry, chronopotentiometry, repeating chronoamperometry). A new, hyphenated analytical technique was developed, which combines a separation step (electrochemical deposition) with a detection step (alpha particle spectroscopy). A theoretical framework for this new technique was presented, together with experimental verification. The verification (signal to concentration correlation) was complicated by unexpectedly low deposition rate in the mixed salt. This interference prompted investigation, and produced a hypothesis which attempts to explain the lower rate as being the result of departure from the mass transfer-limited deposition regime

    Characterization of grain boundaries in silicon

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    Zero-bias conductance and capacitance measurements at various temperatures were used to study trapped charges and potential barrier height at the boundaries. Deep-level transient spectroscopy (DLTS) was applied to measure the density of states at the boundary. A study of photoconductivity of grain boundaries in p-type silicon demonstrated the applicability of the technique in the measurement of minority carrier recombination velocity at the grain boundary. Enhanced diffusion of phosphorus at grain boundaries in three cast polycrystalline photovoltaic materials was studied. Enhancements for the three were the same, indicating that the properties of boundaries are similar, although grown by different techniques. Grain boundaries capable of enhancing the diffusion were found always to have strong recombination activities; the phenomena could be related to dangling bonds at the boundaries. Evidence that incoherent second-order twins of (111)/(115) type are diffusion-active is presented

    The Conservation and Analysis of Small Artifacts from the Site of USS Westfield

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    In the early hours of 1 January 1863, USS Westfield grounded hard in the sand off the northeast side of Pelican Spit in Galveston Bay, Texas. The gunboat was building up steam to cut off two Confederate cottonclads before they reached the other Union ships in the bay. Hours later, an explosion ripped through the hull, sinking the vessel in the shallow water. Scuttled by the captain, William B. Renshaw, Westfield lay in the sands of Galveston Bay until the remains were excavated in 2009 and 2010 by PBS&J, now Atkins Global, under the supervision of the Texas Historical Commission and the U.S. Navy. The artifacts were brought to the Conservation Research Laboratory on Texas A&M University’s Riverside Campus where they were sorted, documented, and conserved. This thesis begins with a detailed account of Westfield’s history, starting with the vessel’s use as a New York ferryboat, the conversion to a gunboat and commission in the West Gulf Blockading Squadron, and, finally, the explosion and sinking during the Second Battle of Galveston and subsequent Confederate salvage attempts. Following this is a summary of the conservation methods used for Westfield artifacts, including an experiment on the treatment of waterlogged cast iron from the ship. A catalog of the artifacts, providing research on the various types of materials in the collection and a short summary of the artifact types, is also presented

    PROTOTIPESMARTCARDREADERE-KTPDENGANRFID

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    GRAMSTUDYOFTELECOMUNICATIONENGINERRINGPOLITECHNICOFSRIWIJAYAInt hisfinalreportliftedthetitleprototypesmartcardreadere-IDcardwithRFID.ThesetoolsworkthewaythesystemisfunctioningRFIDmoduletoreadorscan,itreadsthefrequencyRFIDlabelonthetagreader.Inthisthereisatagreadercoilthatactsasafrequencyscrambler.Thedatareceivedbythereaderpassedtothedatabasehostcomputer.ReadersendsanelectromagneticwavewhichisthenreceivedbytheRFIDlabel.Rfidlabeltosenddataintheformofserialnumbers.Thedatawillbereadfirstdaluluattheinputtothehostcomputerintheformofadatabaseusingvisualbasicprogram.Thedatareadwillbeforwardedtoinprint,whilethedataisnotreadablewillcauseanerror.Ifanerroroccursifthedatabasecanworkcarriedoutadditionaldata.Keyw ords:RFID,smartcardreader,thetagreade

    Investigation and Recovery of USS Westfield (Site 41GV151) Galveston Bay, Galveston County, Texas

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    This report represents the culmination of fourteen years of marine archeological investigations by PBS&J (now Atkins North America, Inc.) associated with the Texas City Channel Improvement Project. Over that time span Atkins’ investigations of the site of USS Westfield (41GV151) have included numerous remote-sensing surveys using various combinations of marine magnetometer, side-scan sonar, sector-scan sonar, sub-bottom profiler, and ROV; three diving investigations totaling 64 dives and over 72 hours of bottom time; and archeological salvage of Westfield resulting in the recovery of at least 8,380 artifacts. These combined efforts were undertaken in order to satisfy the responsibilities of the U.S. Army Corps of Engineers under Section 106 of the National Historic Preservation Act (Public Law 89-665; 16 U.S.C. 470) and the Antiquities Code of Texas (Texas Natural Resource Code, Title 9, Chapter 191). The archeological investigations reported in this document were conducted under Texas Antiquities Permits 3878, 4622, and 5271, issued by the Texas Historical Commission, and Federal Permits for Intrusive Archaeological Research on U.S. Naval Cultural Resources, Nos. PBSJ-2009-001 and PBSJ2009-0002, issued by the U.S. Naval History and Heritage Command. The minimum reporting and survey requirements for marine archeological studies conducted under a Texas Antiquities Permit are mandated by The Texas Administrative Code, Title 13, Part 2, Chapters 26 and 28, respectively. The results of six separate site investigations are reported in this document, including Contract DACW64-03-D-0001Delivery Orders 0004 and 0005, conducted in 2005 and 2006, respectively, and additional site assessments and data recovery conducted under Delivery Order 0006 and four subsequent delivery order modifications in 2007, 2009, and 2010. The results of Delivery Order 0004 conclusively demonstrated that the source of recorded anomaly GV0031 was a shipwreck (and given the site designation 41GV151), which tentatively matched the time period and characteristics of Westfield. The results of Delivery Order 0005 further substantiated the identity of 41GV151 as USS Westfield and concluded that the site demonstrates several criteria for eligibility to the National Register of Historic Places. Delivery Order 0006 resulted in the data recovery operations, which are the primary focus of this report

    Comparison of shower-in and shower-in plus bench entry protocols for prevention of environmental contamination due to personnel entry in a commercial swine facility

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    Objective: To determine if the addition of a bench entry system in a commercial swine facility with a shower lowers the risk of personnel introducing environmental contamination. Materials and methods: Fluorescent powder was used to assess the bench entry system by simulating environmental contamination carried on the footwear of personnel entering a commercial swine farm. On each of ten days, four female employees entered the premises, stepped through the fluorescent powder, performed bench entry procedures, and showered into the farm. For ten additional replicates, the bench was removed and regular farm protocols were followed. The fluorescent powder contamination was evaluated with a grid system at four sampling points including before the bench, after the bench, before the shower, and after the shower. Statistical analysis was conducted to determine if there was a difference in the number of contaminated grid cells found at each sampling between the treatment groups. Results: Fluorescent powder was found after the shower on two study days in which the bench was removed but none when the bench was in place. There was a significant difference in contamination found directly after the bench between days with bench entry and days that the bench was removed, but this was not observed at any of the other sampling points. Implications: A bench entry system may decrease the risk that pathogens reach the clean side of the shower, but improved protocols and additional layers of biosecurity are needed

    Influence of duration of dietary vitamin E supplementation on swine growth performance and carcass quality

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    Supplementing medium-lean genotype pigs with supranutritional concentrations of dietary vitamin E (91 IU d-a-tocopheryl acetate/lb of feed) for as long as 70 d during the finishing phase was not effective in improving swine performance, feeding characteristics, and 24 h loin muscle quality. However, lower carcass temperatures obtained by spray chilling pork sides at O°C versus 4.4°C had a beneficial effect on 24 h carcass quality by improving marbling and lean firmness scores and reducing loin muscle moisture exudate. Overall, 24 h pork carcass quality was impacted more by chill rate than dietary vitamin E supplementation.; Swine Day, Manhattan, KS, November 19, 199

    Crop cultivation in the Talayotic settlement of Son Fornés (Mallorca, Spain) : agricultural practices on the western Mediterranean islands in the first millennium BCE

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    The Balearic Islands were colonised around the transition from the Chalcolithic to the Bronze Age, not earlier than 2300 cal bce and certainly much later than any central or eastern Mediterranean islands. The number of archaeobotanical records is low and consists mainly of cereals and a few pulses. We present here new results of our long-term study of Son Fornés, an archaeological site on Mallorca which was occupied since the beginning of the Iron Age Talayotic period (~ 850 cal bce) and until Roman times (123 bce onwards), in the Balearic Islands. In the Talayotic period of Son Fornés Hordeum vulgare var. vulgare (hulled barley) and Triticum aestivum/durum/turgidum (free-threshing wheat) were the main cereals grown and Vicia faba (broad bean) was the main pulse, while Avena sp. (oats) is considered to have been a weed but was nonetheless consumed and was probably in an early phase of being domesticated. For the subsequent post-Talayotic (ca. 550 − 250 bce), Classic I and Classic II, the Republican Roman occupation period (from 123 bce onwards) the databases are weak, displaying hulled barley as the main crop and broad bean as the main pulse. The archaeobotanical records of Ficus carica (fig), Olea europaea (olive) and Vitis vinifera (grapevine) represent wild or cultivated and domesticated forms. Prunus dulcis (almond) and Pinus pinea (stone pine) were found on Eivissa (Ibiza), pointing to a Phoenician introduction to the islands, while Phoenix dactylifera (date palm) and Castanea sativa (chestnut), found on Menorca, might have been brought in by the Romans. The number of crops being used on the Balearic Islands was limited when compared to sites of similar periods on the European mainland or the central and eastern Mediterranean islands. According to carbon isotope results of Δ13C, hulled barley grew under damper conditions than free-threshing wheat. The high δ15N values indicated that both crops were well-manured with animal dung during the entire occupation period
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