315 research outputs found

    Archaeological Data Recovery (41TR198) and Survey Within the Riverside Oxbow Project Tarrant County, Texas

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    This report presents the findings of the survey of 75 acres and the excavation of 28 cubic meters of site 41TR198 (Crooked Oxbow Site) within the Riverside Oxbow Project sponsored by the U.S. Army Corps of Engineers, Fort Worth District, in partnership with the City of Fort Worth and the Tarrant County Water District. Planned impacts from this proposed project include habitat restoration, channel reestablishment, vegetation plantings, new roads, and sports field construction. The deepest impacts planned for the Area of Potential Effects are one meter and involve the excavation of a shallow lake utilizing the relict oxbow bordering site 41TR198. Impacts planned for the remainder of the project area will be less than one-half meter deep. Overall, the project will attempt to use the existing landscape as much as possible in order to reduce impacts. As a federal agency the USACE is required to undertake cultural resource investigations for their projects in accordance with the National Historic Preservation Act of 1966, as amended through 2001. Since the Tarrant Regional Water District is the landowner and co-sponsor of the project, and a political subentity of the state of Texas, this project was also conducted under Texas Antiquities Permit No. 5040

    Geoarcheological Investigations of Wetland Cell D Within the Dallas Floodway Extension Project Area, Dallas, Texas

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    The Dallas Floodway Extension project is designed to provide flood damage reduction and environmental restoration within the Trinity River flood plain between the Corinth Street Viaduct and Loop 12. The U.S. Army Corps of Engineers, Fort Worth District, contracted with Geo-Marine, Inc., to conduct an archeological assessment of the proposed Wetland Cell D. The archeological assessment was to identify any potential archeological sites that may be eligible for inclusion in the National Register of Historic Places and to provide an assessment of the potential for buried landforms in the project area that may have intact archeological resources present. The geoarcheological investigations, involving the excavation of 10 backhoe trenches and the review of previous data collected within the Upper Trinity River drainage, revealed that the flood plain sediments of the Trinity River are quite variable, both horizontally and vertically. The data collected during the current investigations suggest that Cell D is located along or near the axis of a recent Trinity River meander belt that has cut deeply into the preexisting Quaternary sediments. This channel cut was then rapidly filled with fine-grained deposits possibly derived from the surrounding uplands and other areas upstream. In addition, the trenching revealed that the upper portions of the sediments within Cell D have been disturbed during the recent historic period, presumably by the construction of the Interstate 45 bridge and the activities of the nearby Dallas Central Wastewater Treatment Plant

    New data and the hard pomeron

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    New structure-function data are in excellent agreement with the existence of a hard pomeron, with intercept about 1.4. It gives a very economical description of the data. Having fixed 2 parameters from the data for the real-photon cross section σγp\sigma^{\gamma p}, we need just 5 further parameters to fit the data for F2(x,Q2)F_2(x,Q^2) with x≤0.001x\leq 0.001. The available data range from Q2=0.045Q^2=0.045 to 35 GeV2^2. With guesses consistent with dimensional counting for the xx dependences of our three separate terms, the fit extends well to larger xx and to Q2=5000Q^2=5000 GeV2^2. With no additional parameters, it gives a good description of data for the charm structure function F2c(x,Q2)F_2^c(x,Q^2) from Q2=0Q^2=0 to 130 GeV2^2. The two pomerons also give a good description of both the WW and the tt dependence of γp→J/ψp\gamma p\to J/\psi p.Comment: 11 pages, plain tex, with 10 figures embedded using epsf. (Spurious figure removed.

    Advanced aeroservoelastic stabilization techniques for hypersonic flight vehicles

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    Advanced high performance vehicles, including Single-Stage-To-Orbit (SSTO) hypersonic flight vehicles, that are statically unstable, require higher bandwidth flight control systems to compensate for the instability resulting in interactions between the flight control system, the engine/propulsion dynamics, and the low frequency structural modes. Military specifications, such as MIL-F-9490D and MIL-F-87242, tend to limit treatment of structural modes to conventional gain stabilization techniques. The conventional gain stabilization techniques, however, introduce low frequency effective time delays which can be troublesome from a flying qualities standpoint. These time delays can be alleviated by appropriate blending of gain and phase stabilization techniques (referred to as Hybrid Phase Stabilization or HPS) for the low frequency structural modes. The potential of using HPS for compensating structural mode interaction was previously explored. It was shown that effective time delay was significantly reduced with the use of HPS; however, the HPS design was seen to have greater residual response than a conventional gain stablized design. Additional work performed to advance and refine the HPS design procedure, to further develop residual response metrics as a basis for alternative structural stability specifications, and to develop strategies for validating HPS design and specification concepts in manned simulation is presented. Stabilization design sensitivity to structural uncertainties and aircraft-centered requirements are also assessed

    Archeological and Bioarcheological Investigations at Campbell’s Bayou Cemetery Galveston County, Texas

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    This report documents the removal of individuals buried within Campbell’s Bayou Cemetery (41GV171) to avoid potential impact to the remains during implementation of remediation activities at the Malone Service Company Superfund Site (Site) in Texas City, TX. An oil recovery and waste processing facility had operated at the Site for more than 30 years, ending in the mid1990s. The facility had stored, processed, and disposed of industrial solid wastes and hazardous wastes. In July 2012, a group of companies known as the Malone Cooperating Parties (MCP) entered into a Consent Decree with the U.S. Government, the U.S. Environmental Protection Agency, and the State of Texas to implement a remedial design and remedial action at the Site. It was determined that if the remains in the cemetery were not relocated, there was the potential that remediation activities could impact the cemetery. Archival research, review of historic maps and aerial photographs, and reconnaissance survey revealed the extent of potential remains at the cemetery, and, given the location of the cemetery and the scope of the planned remediation activities, it was deemed impractical for the environmental remediation contractors to work around the cemetery. (41GV171). The MCP consulted with EPA, Campbell family descendants, the Galveston County Historical Commission, and the Texas Historical Commission and developed a plan to relocate the remains to a perpetual care cemetery in accordance with Texas state law and associated rules and procedures. In accordance with Texas Health and Safety Code §711.004, the landowner Land Navigator, Ltd., on behalf of the MCP, petitioned the Galveston County Judicial District Court for removal of the dedication of the cemetery and the transfer of the human remains to the perpetual care cemetery operated by Forest Park East Funeral Home and Cemetery (FPE), 21620 Gulf Freeway, Webster, TX 77598. On February 11, 2014, Land Navigator was granted a Summary Judgment allowing Land Navigator to disinter and relocate the remains to FPE. Versar, Inc. (formerly Geo-Marine, Inc.), on behalf of the MCP, provided all archeological and human osteological expertise for the disinterment and analysis of the human remains. Disinterment permits from the State Registrar of the Vital Statistics Unit of the Department of State Health Services, as required by Texas Administrative Code, Title 13, Chapter 22 (Texas Historical Commission, Cemeteries), were obtained for each burial. The disinterment excavations at Campbell’s Bayou Cemetery revealed 34 burials from which 35 individuals were excavated. No graves were marked by headstones. It is the professional judgment of Versar that, of the 35 individual sets of remains identified, 11 were determined to be adults (5 male and 3 female; 3 of indeterminate sex), and 24 were determined to be children. The majority of children at Campbell’s Bayou Cemetery (n=18) are under 5 years of age and six are premature infants aged 30–40 weeks. Burials could not be associated conclusively with any individuals identified by the descendants; however, the combination of bioarcheological analysis, coffin hardware analysis, census data, and descendant identifications resulted in a list of individuals that may have been interred in certain graves. Some of the interments include James and Mary Campbell, Charlie Meyers, Benjamin Ninnie Dick, Phoebe Rutlage, and Shelby McNeil, Jr. Children were difficult to identify; however, there is good potential the graves of Frank Campbell, Mary Jane Campbell, Charles Munson, and Grace Dick were identified. Data are conclusive that the children Levi and Joseph (Joe) Parr were both interred together in Burial 6, the concrete crypt with brick covering. Grace Dick was the last individual interred at the cemetery in 1904

    Religious Identity, Religious Attendance, and Parental Control

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    Using a national sample of adolescents aged 10–18 years and their parents (N = 5,117), this article examines whether parental religious identity and religious participation are associated with the ways in which parents control their children. We hypothesize that both religious orthodoxy and weekly religious attendance are related to heightened levels of three elements of parental control: monitoring activities, normative regulations, and network closure. Results indicate that an orthodox religious identity for Catholic and Protestant parents and higher levels of religious attendance for parents as a whole are associated with increases in monitoring activities and normative regulations of American adolescents

    Plasma Cytokine Concentrations Indicate In-vivo Hormonal Regulation of Immunity is Altered During Long-Duration Spaceflight

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    Background: Aspects of immune system dysregulation associated with longduration spaceflight have yet to be fully characterized, and may represent a clinical risk to crewmembers during deep space missions. Plasma cytokine concentration may serve as an indicator of in vivo physiological changes or immune system mobilization. Methods: The plasma concentrations of 22 cytokines were monitored in 28 astronauts during longduration spaceflight onboard the International Space Station. Blood samples were collected three times before flight, 35 times during flight (depending on mission duration), at landing and 30 days postlanding. Analysis was performed by bead array immunoassay. Results: With few exceptions, minimal detectable mean plasma levels (<10 pg/ml) were observed at baseline (launch minus 180) for innate inflammatory cytokines or adaptive regulatory cytokines, however IL1ra and several chemokines were constitutively present. An increase in the plasma concentration IL8, IL1ra, Tpo, CCL4, CXCL5, TNF(alpha), GMCSF and VEGF was observed associated with spaceflight. Significant postflight increases were observed for IL6 and CCL2. No significant alterations were observed during or following spaceflight for adaptive/Tregulatory cytokines (IL2, IFN(gamma), IL17, IL4, IL5, IL10). Conclusions: This pattern of cytokine dysregulation suggests multiple physiological adaptations persist during flight, including inflammation, leukocyte recruitment, angiogenesis and thrombocyte regulation

    Ice Particle Impacts on a Flat Plate

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    An experimental study was conducted at the Ballistic Laboratory of NASA Glenn Research Center to study the impact of ice particles on a stationary flat surface target set at 45 degrees with respect to the direction of motion of the impinging particle (Figure 1). The experiment is part of NASA efforts to study the physics involved in engine power-loss events due to ice-crystal ingestion and ice accretion formation inside engines. These events can occur when aircraft encounter high-altitude convective weather

    Design and analysis of low boom concepts at Langley Research Center

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    The objective of the sonic boom research in the current High Speed Research Program is to ultimately make possible overland supersonic flight by a high speed civil transport. To accomplish this objective, it is felt that results in four areas must demonstrate that such a vehicle would be acceptable by the general public, by the airframers, and by the airlines. It should be demonstrated: (1) that some waveform shape has the possibility of being acceptable to the general public; (2) that the atmosphere would not totally destroy such a waveform during propagation; (3) that a viable airplane could be built which produces such a waveform; and (4) that any performance penalty suffered by a low boom aircraft would be counteracted by the economic benefit of overland supersonic flight. The work being done at LaRC is in support of the third element listed above--the area of configuration design. The initial part of the paper will give a review of the theory being used for configuration designs and discuss two theory validation models which were built and tested within the past two years. Discussion of the wind tunnel and theoretical results (linear theory and higher order methods) and their implications for future designs will be included
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