989 resultados para Jurassic Period
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Report on the Iowa Early Intervention Block Grant Program administered by the Department of Education for the period July 1, 2005 through June 30, 2010
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The carbon isotopic signature of carbonates depends on secular variations of organic carbon and carbonate carbon production/burial rates. A decrease in carbonate productivity makes the organic/carbonate carbon ratio unstable up to the point that even minor variations in the organic carbon reservoirs can provoke carbon isotopic shifts. The delta(13)C positive shifts of the middle Carixian (early Pliensbachian) and the early Bajocian recorded in the Umbria-Marche-Sabina domain represent a good example of this mechanism. Both sedimentology and lithostratigraphy of pelagic platform-basin carbonate systems in this area show that important changes in the source of carbonates correspond to the observed isotopic shifts. The middle Carixian event is in fact well correlatable to the drastic reduction of benthic carbonate production on rift-related intrabasinal highs, which then became pelagic carbonate platforms. The early Bajocian event is concomitant with the beginning of a long hiatus on the pelagic carbonate platforms and with a drop of the biodiversity of calcareous organisms followed by the onset of biosiliceous sedimentation in basins. (C) 2002 Elsevier Science B.V. All rights reserved.
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Report on a review of selected general and application controls over the Iowa Public Employees’ Retirement System (IPERS) Legacy and I-Que Pension Administration Systems for the period May 16, 2011 through June 16, 2011
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Report on a review of the Boiler and Pressure Vessel Safety Program and the Elevator and Escalator Safety Program administered by Iowa Workforce Development for the period July 1, 2008 through June 30, 2010
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Agreed upon procedures report on the City of Woolstock, Iowa for the period July 1, 2009 through June 30, 2010
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Special investigation of the Bremer County Sheriff’s Office for the period January 1, 2009 through March 17, 2011
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Background: We aimed to analyze the rate and time distribution of pre- and post-morbid cerebrovascular events in a single ischemic stroke population, and whether these depend on the etiology of the index stroke. Methods: In 2,203 consecutive patients admitted to a single stroke center registry (ASTRAL), the ischemic stroke that led to admission was considered the index event. Frequency distribution and cumulative relative distribution graphs of the most recent and first recurrent event (ischemic stroke, transient ischemic attack, intracranial or subarachnoid hemorrhage) were drawn in weekly and daily intervals for all strokes and for all stroke types. Results: The frequency of events at identical time points before and after the index stroke was mostly reduced in the first week after (vs. before) stroke (1.0 vs. 4.2%, p < 0.001) and the first month (2.7 vs. 7.4%, p < 0.001), and then ebbed over the first year (8.4 vs. 13.1%, p < 0.001). On daily basis, the peak frequency was noticed at day -1 (1.6%) with a reduction to 0.7% on the index day and 0.17% 24 h after. The event rate in patients with atherosclerotic stroke was particularly high around the index event, but 1-year cumulative recurrence rate was similar in all stroke types. Conclusions: We confirm a short window of increased vulnerability in ischemic stroke and show a 4-, 3- and 2-fold reduction in post-stroke events at 1 week, 1 month and 1 year, respectively, compared to identical pre-stroke periods. This break in the 'stroke wave' is particularly striking after atherosclerotic and lacunar strokes.
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Reaudit report on Linn County, Iowa for the period July 1, 2009 through June 30, 2010
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Report on a special investigation of the Webster County Metropolitan Law Enforcement Telecommunications Board for the period July 1, 2006 to January 28, 2011
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Special investigation of the City of Denison Fire Department for the period July 1, 2005 through March 31, 2010
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Review of the Department of Natural Resources Parks Reservation System and the Electronic Licensing System for Iowa for the period July 1, 2006 through June 30, 2011
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Reaudit report on the Johnston Community School District for the period July 1, 2009 through June 30, 2010
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Report on a special investigation of UNItix, the University of Northern Iowa’s centralized ticketing office, for the period August 1, 2008 through August 31, 2010
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Report on a special investigation of the Clay Central-Everly Community School District for the period July 1, 2005 through November 30, 2010