Field Instrumentation, Testing, and Long-Term Monitoring of High-Mast Lighting Towers in the State of Iowa, TR-518, 2006

As a result of the collapse of a 140 foot high-mast lighting tower in Sioux City, Iowa in November of 2003, a thorough investigation into the behavior and design of these tall, yet relatively flexible structures was undertaken. Extensive work regarding the root cause of this failure was carried out by Robert Dexter of The University of Minnesota. Furthermore, a statewide inspection of all the high-mast towers in Iowa revealed fatigue cracks and loose anchor bolts on other existing structures. The current study was proposed to examine the static and dynamic behavior of a variety of towers in the State of Iowa utilizing field testing, specifically long-term monitoring and load testing. This report presents the results and conclusions from this project. The field work for this project was divided into two phases. Phase 1 of the project was conducted in October 2004 and focused on the dynamic properties of ten different towers in Clear Lake, Ames, and Des Moines, Iowa. Of those ten, two were also instrumented to obtain stress distributions at various details and were included in a 12 month long-term monitoring study. Phase 2 of this investigation was conducted in May of 2005, in Sioux City, Iowa, and focused on determining the static and dynamic behavior of a tower similar to the one that collapsed in November 2003. Identical tests were performed on a similar tower which was retrofitted with a more substantial replacement bottom section in order to assess the effect of the retrofit. A third tower with different details was dynamically load tested to determine its dynamic characteristics, similar to the Phase 1 testing. Based on the dynamic load tests, the modal frequencies of the towers fall within the same range. Also, the damping ratios are significantly lower in the higher modes than the values suggested in the AASHTO and CAN/CSA specifications. The comparatively higher damping ratios in the first mode may be due to aerodynamic damping. These low damping ratios in combination with poor fatigue details contribute to the accumulation of a large number of damage-causing cycles. As predicted, the stresses in the original Sioux City tower are much greater than the stresses in the retrofitted towers at Sioux City. Additionally, it was found that poor installation practices which often lead to loose anchor bolts and out-of-level leveling nuts can cause high localized stresses in the towers, which can accelerate fatigue damage.

Report on the University of Northern Iowa, Cedar Falls, Iowa for the year ended June 30, 2014

Report on the University of Northern Iowa, Cedar Falls, Iowa for the year ended June 30, 2014

Report on a special investigation of the University of Northern Iowa, College of Education – Curriculum and Instruction Department for the period January 1, 2012 through October 31, 2014

Report on a special investigation of the University of Northern Iowa, College of Education – Curriculum and Instruction Department for the period January 1, 2012 through October 31, 2014

Report on a review of selected general and application controls over the University of Northern Iowa Facility Administration and Maintenance Information System for the period April 29, 2014 through June 5, 2014

Report on a review of selected general and application controls over the University of Northern Iowa Facility Administration and Maintenance Information System for the period April 29, 2014 through June 5, 2014

Audit report of the University of Northern Iowa, Cedar Falls, Iowa, as of and for the years ended June 30, 2015 and 2014

Audit report of the University of Northern Iowa, Cedar Falls, Iowa, as of and for the years ended June 30, 2015 and 2014

Progress Report on Iowa State University Burroughs Endowment Activities

Faculty in the Department of Animal Science initiated soliciting of funds in 1987 to establish a permanent endowment to recognize the distinguished career and major contributions of Dr. Wise Burroughs, a distinguished professor in animal science at Iowa State University. The endowment was established in the Iowa State University Foundation in 1991. The purpose of the fund is to support research and graduate education in the areas of fundamental factors regulating growth in food-producing animals, with emphasis on ruminants; to enhance growth of animals with the goal of improving the competitive position of ruminants as food-producing animals; and to develop innovative approaches to ruminant nutrition and/or growth enhancement as a means to improve desirability of meat produced by food animals. Dr. Burroughs’ research resulted in important and significant developments in technology for modern production systems for beef cattle. He was widely known for his ability to communicate complex ideas and research results for use by those involved in the animal industry. The current Burroughs Team has established three research projects: 1) Ghrelin--How does ghrelin affect blood and body composition in rats?; 2) Use of 25- hydroxyvitamin D3 to improve tenderness of beef; 3) Redesigning beef cattle to have a more healthful fatty acid composition.

Iowa State University ADVANCE Program, Annual Report, Year 1: June 2007

The goal of the ISU ADVANCE program is to investigate the effectiveness of a multilevel collaborative effort to produce institutional transformation that results in the full participation of women faculty in science, technology, engineering and math fields in the university. Our approach focuses on transforming departmental cultures (views, attitudes, norms and shared beliefs), practices (what people say and do), and structures (physical and social arrangements), as well as university policies, through active participation of individuals at all levels of the university.

Iowa State University Strategic Plan 2010–2015

The challenges of the 21st century demand that we focus on what we do best. To ensure that Iowa State University is a leading research university in 2050, we must recruit, support, and retain students, faculty, and staff who are committed to excellence, integrity, the free exchange of ideas, and collaboration. It is imperative that the creation, sharing, and application of knowledge be a global effort characterized by a profound respect for the diversity of people and ideas. These are the values that enrich our work and guide Iowa State’s Strategic Plan.

General Catalog 1987–1989, Iowa State University Bulletin

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.

Iowa State University Bulletin, General Catalog 1991–93

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.

General Catalog 1985–87, Iowa State University Bulletin

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.

Iowa State University Bulletin, General Catalog 1995–97

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.

Iowa State University Bulletin, General Catalog 1993–95

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.

General Catalog 1983–85, Iowa State University Bulletin

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.

General Catalog 1989–1991, Iowa State University Bulletin

The Iowa State University Bulletin is a general catalog of information regarding fees, curricula and related policies and procedures.