Iowa EHDI News, Fall 2010

The purpose of the newsletter is to communicate with parents and professionals about newborn hearing screening in Iowa. We will share information about: Hearing screenings Intervention Resources available for parents and professionals “Best practices” by hospitals, AEAs (Area Education Agencies), or private practive audiology offices System goals Family stories Highlights from the EHDI Advisory Committee Updates on Iowa’s EHDI program It is important to point out that we are a diverse team of individuals working together to ensure that all newborns and toddlers with hearing loss are identified as early as possible and provided with timely and appropriate audiological, educational and medical intervention. Each newsletter will introduce you to various team members of the EHDI system in Iowa.

Consumer Advisory Bulletin, Listen Up!" -- for Tips on Buying a Hearing Aid, January 2008

The Attorney General’s Consumer Protection Division receives hundreds of calls and consumer complaints every year. Follow these tips to avoid unexpected expense and disappointments. This record is about: Listen Up!" -- for Tips on Buying a Hearing Aid

Hearing Aids and Audiological Services Funding Summary - Fiscal Year 2009

An annual report from the Early Hearing Detection and Intervention section of the Iowa Department of Public Health stating the number of children receiving audiological services, the dollars spent and the insrance coverage of the children that received either services or equipment.

Hearing Aids and Audiological Services Funding Summary - Fiscal Year 2010

An annual report from the Early Hearing Detection and Intervention section of the Iowa Department of Public Health stating the number of children receiving audiological services, the dollars spent and the insrance coverage of the children that received either services or equipment.

Iowa's Early Hearing and Intervention Program - Hearing Checklist, 2011

A simple checklist divided into sections by month showing the common progression of hearing ability of a child up to three years of age .

Iowa Hearing Health Care Directory, 2008

Audiologists, hearing aid dispensers, and ear, nose, and throat doctors were invited to be listed in this directory. All providers who responded and provide pediatric hearing health care services to children have been included in this directory. The information listed was provided by each provider.

Hearing Aids and Audiological Services Funding Summary - Fiscal Year 2011

An annual report from the Early Hearing Detection and Intervention section of the Iowa Department of Public Health stating the number of children receiving audiological services, the dollars spent and the insrance coverage of the children that received either services or equipment.

Hearing Aids and Audiological Services Funding Summary - Fiscal Year 2012

An annual report from the Early Hearing Detection and Intervention section of the Iowa Department of Public Health stating the number of children receiving audiological services, the dollars spent and the insrance coverage of the children that received either services or equipment.

Early ACCESS (EA) – Early Hearing Detection and Intervention (EHDI) Questions and Answers Summary

This is a six page document of Qusetions and Answer for Early Hearing Detecting and Inventation.

Hearing Aids and Audiological Services for Children Questions & Answers,

Question and Answer information for Children with hearing problems, with hearing aids and audiological services.

Determination of entrance loss coefficients for pre-cast reinforced Concrete Box Culverts, December 2012

There is an increased interest in constructing Pre-Cast (PC) Twin and Triple Reinforced Concrete Box (RCB) culverts in Iowa due to the efficiency associated with their production in controlled environment and decrease of the construction time at the culvert sites. The design of the multi-barrel PC culverts is, however, based on guidelines for single-barrel cast-inplace (CIP) culverts despite that the PC and CIP culverts have different geometry. There is scarce information for multiplebarrel RCB culverts in general and even fewer on culverts with straight wingwalls as those designed by Iowa DOT. Overall, the transition from CIP to PC culverts requires additional information for improving the design specifications currently in use. Motivated by the need to fill these gaps, an experimental study was undertaken by IIHR-Hydroscience & Engineering. The goals of the study are to document flow performance curves and head losses at the culvert entrance for a various culvert geometry, flow conditions, and settings. The tests included single-, double- and triple-barrel PC and CIP culverts with two span-to-rise ratios set on mild and steep slopes. The tests also included optimization of the culvert geometry entrance by considering various configurations for the top bevel. The overall conclusion of the study is that by and large the current Iowa DOT design specifications for CIP culverts can be used for multi-barrel PC culvert design. For unsubmerged flow conditions the difference in the hydraulic performance curves and headloss coefficients for PC and CIP culverts are within the experimental uncertainty. Larger differences (specified by the study) are found for submerged conditions when the flow is increasingly constricted at the entrance in the culvert. The observed differentiation is less important for multi-barrel culverts as the influence of the wingwalls decreases with the increase of the number of barrels.

Investigation of the Loss of Prestress in Prestressed Concrete Beams due to Steam Curing, HR-62, 1961

Mass production of prestressed concrete beams is facilitated by the accelerated curing of the concrete. The ·method most commonly used for this purpose is steam curing at atmospheric pressure. This requires concrete temperatures as high as 150°F. during the curing period. Prestressing facilities in Iowa are located out of doors. This means that during the winter season the forms are set and the steel cables are stressed at temperatures as low as 0°F. The thermal expansion of the prestressing cables should result in a reduction of the stress which was placed in them at the lower temperature. If the stress is reduced in the cables, then the amount of prestress ultimately transferred to the concrete may be less than the amount for which the beam was designed. Research project HR-62 was undertaken to measure and explain the difference between the initial stress placed in the cables and the actual stress which is eventually transferred to the concrete. The project was assigned to the Materials Department Laboratory under the general supervision of the Testing Engineer, Mr. James W. Johnson. A small stress bed complete with steam curing facilities was set up in the laboratory, and prestressed concrete beams were fabricated under closely controlled conditions. Measurements were made to determine the initial stress in the steel and the final stress in the concrete. The results of these tests indicate that there is a general loss of prestressing force in excess of that caused by elastic shortening of the concrete. The exact amount of the loss and the identification of the factors involved could not be determined from this limited investigation.

Examination of Curing Criteria for Cold In-Place Recycling (Phase 3: Calibration of Moisture Loss Indices and Development of Stiffness Gain Model), TR-609, 2011

In the previous study, moisture loss indices were developed based on the field measurements from one CIR-foam and one CIR-emulsion construction sites. To calibrate these moisture loss indices, additional CIR construction sites were monitored using embedded moisture and temperature sensors. In addition, to determine the optimum timing of an HMA overlay on the CIR layer, the potential of using the stiffness of CIR layer measured by geo-gauge instead of the moisture measurement by a nuclear gauge was explored. Based on the monitoring the moisture and stiffness from seven CIR project sites, the following conclusions are derived: 1. In some cases, the in-situ stiffness remained constant and, in other cases, despite some rainfalls, stiffness of the CIR layers steadily increased during the curing time. 2. The stiffness measured by geo-gauge was affected by a significant amount of rainfall. 3. The moisture indices developed for CIR sites can be used for predicting moisture level in a typical CIR project. The initial moisture content and temperature were the most significant factors in predicting the future moisture content in the CIR layer. 4. The stiffness of a CIR layer is an extremely useful tool for contractors to use for timing their HMA overlay. To determine the optimal timing of an HMA overlay, it is recommended that the moisture loss index should be used in conjunction with the stiffness of the CIR layer.

Loss of Prestress, Camber, and Deflection of Non-Composite and Composite Structures Using Different Weight Concretes, HR-137, 1970

General equations are presented for predicting loss of prestress and camber of both composite and non- composite prestressed concrete structures. Continuous time functins of all parameters needed to solve the equations are given, and sample results included. Computed prestress loss and camber are compared with experimental data for normal weight and lightweight concrete. Methods are also presented for predicting the effect of non-prestressed tension steel in reducing time-dependent loss of prestress and camber, and for the determination of short-time deflections of uncracked and cracked prestressed members. Comparisons with experimental results are indicated for these partially prestressed methods.