G-1 Appeal Activity In The Public Assistance Programs, December 2004

Appeal Activity In The Public Assistance Programs

F-1 Food Assistance Program State Summary, December 2004

Food Assistance Program State Summary

Lottery Action, November 21 - December 12, 2004, Vol. 11, no 22

Lottery Newsletter for Lottery Retailers

Lottery Action, December 13, 2004 - January 2, 2005, Vol. 11, no. 23

Iowa Lottery Newsletter for Retailers

A-7 Statistical Report On FIP Applications And Cases Discontinued, December 2004

Statistical Report On FIP Applications And Cases Discontinued

A-1A Supplemental Security Income Program, December 2004

SUPPLEMENTAL SECURITY INCOME PROGRAM

D-3 2005-2 Dependent Adult Abuse Report, July-December 2005

D-3 Dependent Adult Abuse Report

Evaluation of Different Methods to Calculate Heavy-Truck VMT, Final Report, December 2004

Reliable estimates of heavy-truck volumes are important in a number of transportation applications. Estimates of truck volumes are necessary for pavement design and pavement management. Truck volumes are important in traffic safety. The number of trucks on the road also influences roadway capacity and traffic operations. Additionally, heavy vehicles pollute at higher rates than passenger vehicles. Consequently, reliable estimates of heavy-truck vehicle miles traveled (VMT) are important in creating accurate inventories of on-road emissions. This research evaluated three different methods to calculate heavy-truck annual average daily traffic (AADT) which can subsequently be used to estimate vehicle miles traveled (VMT). Traffic data from continuous count stations provided by the Iowa DOT were used to estimate AADT for two different truck groups (single-unit and multi-unit) using the three methods. The first method developed monthly and daily expansion factors for each truck group. The second and third methods created general expansion factors for all vehicles. Accuracy of the three methods was compared using n-fold cross-validation. In n-fold cross-validation, data are split into n partitions, and data from the nth partition are used to validate the remaining data. A comparison of the accuracy of the three methods was made using the estimates of prediction error obtained from cross-validation. The prediction error was determined by averaging the squared error between the estimated AADT and the actual AADT. Overall, the prediction error was the lowest for the method that developed expansion factors separately for the different truck groups for both single- and multi-unit trucks. This indicates that use of expansion factors specific to heavy trucks results in better estimates of AADT, and, subsequently, VMT, than using aggregate expansion factors and applying a percentage of trucks. Monthly, daily, and weekly traffic patterns were also evaluated. Significant variation exists in the temporal and seasonal patterns of heavy trucks as compared to passenger vehicles. This suggests that the use of aggregate expansion factors fails to adequately describe truck travel patterns.

Development of a Mix Design Process for Cold-in-Place Rehabilitation Using Foamed Asphalt, December 2005

Report by Iowa Department of Transportation about pavements materials.

Audit report on America's Agricultural Industrial Heritage Landscape Inc. d/b/a Silos and Smokestacks National Heritage Area, Independent Auditor's Reports, Financial Statements and Supplementary Information, Schedule of Findings and Questioned Costs, December 31st, 2003 & 2004

Other Audit Reports

Executive Order Number Thirty-Four, December 2003

Executive order signed by Governor Thomas Vilsck

Executive Order Number Thirteen, December 1999

Executive order signed by Governor Thomas Vilsck

Report on Special Investigation of Before and After School Services, For the Period July 1, 2000 through December 31, 2004

Other Audit Reports - Special Investigation

Iowa Turkey Marketing Council, Independent Auditor's Reports, Financial Statements, Schedule of Findings, December 31, 2003 & 2004

State Audit Reports

Evaluating Properties of Blended Cements for Concrete Pavements, December 2003

The addition of supplementary cementitious materials (SCMs), such as fly ash (FA) and slag, generally improves concrete workability, durability, and long-term strength. New trends in sustainable development of concrete infrastructure and in environmental regulations on waste disposal are spurring use of SCMs in concrete. However, use of SCM concrete is sometimes limited due to a lack of understanding about material behaviors and lack of proper specifications for its construction practice. It is believed that SCM concrete performance varies significantly with the source and proportion of the cementitious materials. SCM concrete often displays slower hydration, accompanied by slower setting and lower early-age strength, especially under cold weather conditions. The present research was conducted to have a better understanding of SCM concrete behaviors under different weather conditions. In addition to the study of the effect of SCM content on concrete set time using cementitious materials from different sources/manufacturers, further research may be needed to investigate the effects of SCM combinations on concrete flowability, air stability, cracking resistance, and durability.