24 resultados para Storage Temperature
em Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States
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State Agency Audit Report
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State Agency Audit Report
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State Audit Reports
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Proper storage practices are critical to protect materials from intermingling, contamination, or degradation, and to maintain consistent aggregate gradation throughout a project. Concrete Paving Workforce Reference no.1
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This paper describes a maximum likelihood method using historical weather data to estimate a parametric model of daily precipitation and maximum and minimum air temperatures. Parameter estimates are reported for Brookings, SD, and Boone, IA, to illustrate the procedure. The use of this parametric model to generate stochastic time series of daily weather is then summarized. A soil temperature model is described that determines daily average, maximum, and minimum soil temperatures based on air temperatures and precipitation, following a lagged process due to soil heat storage and other factors.
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State Audit Reports
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Of the approximately 25,000 bridges in Iowa, 28% are classified as structurally deficient, functionally obsolete, or both. Because many Iowa bridges require repair or replacement with a relatively limited funding base, there is a need to develop new bridge materials that may lead to longer life spans and reduced life-cycle costs. In addition, new and effective methods for determining the condition of structures are needed to identify when the useful life has expired or other maintenance is needed. Due to its unique alloy blend, high-performance steel (HPS) has been shown to have improved weldability, weathering capabilities, and fracture toughness than conventional structural steels. Since the development of HPS in the mid-1990s, numerous bridges using HPS girders have been constructed, and many have been economically built. The East 12th Street Bridge, which replaced a deteriorated box girder bridge, is Iowa’s first bridge constructed using HPS girders. The new structure is a two-span bridge that crosses I-235 in Des Moines, Iowa, providing one lane of traffic in each direction. A remote, continuous, fiber-optic based structural health monitoring (SHM) system for the bridge was developed using off-the-shelf technologies. In the system, sensors strategically located on the bridge collect raw strain data and then transfer the data via wireless communication to a gateway system at a nearby secure facility. The data are integrated and converted to text files before being uploaded automatically to a website that provides live strain data and a live video stream. A data storage/processing system at the Bridge Engineering Center in Ames, Iowa, permanently stores and processes the data files. Several processes are performed to check the overall system’s operation, eliminate temperature effects from the complete strain record, compute the global behavior of the bridge, and count strain cycles at the various sensor locations.
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Audit report on the Iowa Petroleum Underground Storage Tank Board (UST Board) for the year ended June 30, 2006
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Audit report on the Iowa Petroleum Underground Storage Tank Board (UST Board) for the year ended June 30, 2007
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Audit report on the Iowa Petroleum Underground Storage Tank Board (UST Board) for the year ended June 30, 2008
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Report produced by the The Department of Agriculture and Land Stewardship, Climatology Bureau.
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Audit report on the Iowa Petroleum Underground Storage Tank Board (UST Board) for the year ended June 30, 2009
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Audit report on the Iowa Petroleum Underground Storage Tank Board (UST Board) for the year ended June 30, 2010
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Audit report on the Iowa Petroleum Underground Storage Tank Board for the year ended June 30, 2011
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Audit report on the Iowa Petroleum Underground Storage Tank Board for the year ended June 30, 2012
