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- College students--Middle West--Attitudes; Recycling (Waste (1)
- Etc.)--Middle West--Public opinion; (1)
- Numbers; Ordinal; Covering spaces (Topology); (1)
- Nutrient pollution of water--Cedar River Watershed (Minn. and Iowa); Water--Pollution--Cedar River Watershed (Minn. and Iowa)--Measurement; Nonpoint source pollution--Cedar River Watershed (Minn. and Iowa); (1)
- Nutrient pollution of water--Iowa--Dry Run Creek (Black Hawk County); Stream measurements--Iowa--Dry Run Creek (Black Hawk County); (1)
Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Calculating Nutrient Loads From Four Tributaries Of The Cedar River In Iowa, Jacob Donaghy
Calculating Nutrient Loads From Four Tributaries Of The Cedar River In Iowa, Jacob Donaghy
Dissertations and Theses @ UNI
A study was done on four tributaries to the Cedar River to determine nutrient concentrations, loads, and the contribution of each watershed per unit area. The Cedar River watershed is primarily agricultural land and extends from southern Minnesota to southeastern Iowa. Past studies have indicated that this watershed is a major contributor of nitrate to the Gulf of Mexico via the Mississippi River. This eutrophication is the cause of the hypoxic Gulf. From April 13, 2010-September 21, 2010 samples were taken from four tributaries of the Cedar River. Discharge data were taken from USGS gaging stations along with a method …
Understanding The Impact Of Vegetation On Surface Roughness Length For Enhancing Wind Resource Characterization In Iowa, Andrei Vladimirovich Kushkin
Understanding The Impact Of Vegetation On Surface Roughness Length For Enhancing Wind Resource Characterization In Iowa, Andrei Vladimirovich Kushkin
Dissertations and Theses @ UNI
Wind energy development shows a rapid growth in the United States. This renewable energy source not only mitigates environmental concerns by reducing greenhouse gas emission, but also provides energy independence. Wind is clean and abundant, and is one of the most promising sources of alternative energy. Iowa is among the top wind energy producers in the nation, it is third by installed capacity and first in per capita production. In order to utilize wind resource potential most efficiently, accurate wind resource assessments are required. Changes in the aerodynamic characteristics of a site can have a major influence on the wind …
Developing Rating Curves In A Small Iowa Watershed To Evaluate Nutrient Loading In Streams, Jennifer Mary Shepeck
Developing Rating Curves In A Small Iowa Watershed To Evaluate Nutrient Loading In Streams, Jennifer Mary Shepeck
Dissertations and Theses @ UNI
Dry Run Creek, a tributary to the Cedar River in northeast Iowa, is a watershed under high pressure from the surrounding region. With its headwaters located in farm fields and urban drainage ditches, it is subject to flash flooding and erosion and is on the DNR’s list of impaired waters. Dry Run Creek is similar to other small watersheds across eastern Iowa. As tributaries to the larger rivers that eventually flow into the Mississippi River and then to the Gulf of Mexico, they are significant contributors to the nutrient loading causing the hypoxia in the Gulf. The purpose of this …
A Study Of College Student Attitudes And Behaviors Related To Recycling, Mark Allen Wilcox
A Study Of College Student Attitudes And Behaviors Related To Recycling, Mark Allen Wilcox
Dissertations and Theses @ UNI
There is an abundance of research on environmental attitudes and recycling; specifically however college students are very under represented. This population is one that is very important as these individuals will be the ones making decisions, privately and politically, with regards to recycling programs in their communities. By understanding their attitudes and behaviors in college, those designing recycling programs can develop and modify programs to suit their needs, and education programs can be prepared to better inform these individuals. The purpose of this study was to study the attitudes and behaviors of college students related to recycling. To accomplish this, …
Development Of A Multi-Mode Self-Adaptive Algorithm To Create An Efficient Wireless Network On A University Campus, Melanie L. Abbas
Development Of A Multi-Mode Self-Adaptive Algorithm To Create An Efficient Wireless Network On A University Campus, Melanie L. Abbas
Dissertations and Theses @ UNI
The expanding use of ubiquitous computing has created a significant demand on existing network infrastructures. The demands of voice, video, and data on the same medium require a quality of service (QoS) at a level acceptable to users. Many network providers simply scale their networks to increase bandwidth and hardware to deal with the increasing demands. However, a network may still reach its design limits with peak traffic or malicious overuse of resources. In addition, with technology changing at a rapid pace, it is difficult to provide sufficient staffing to monitor and adjust the network settings to avoid issues during …
D-Spaces In Infinite Products Of Ordinals, Duncan Wright
D-Spaces In Infinite Products Of Ordinals, Duncan Wright
Dissertations and Theses @ UNI
William Fleissner and Adrienne Stanley showed that, in finite products of ordinals, the following are equivalent: 1. X is a D-space. 2. X is metacompact. 3. X is metalindel¨of. 4. X does not contain a closed subset which is homeomorphic to a stationary subset of a regular, uncountable cardinal. In this paper we construct a counterexample that shows that this equivalence does not extend to infinite products of ordinals. We also introduce a new property, club-separable, which we show implies D for subsets of ωω1. We hope that club-separable will be able to replace property (4) above in order to …