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Full-Text Articles in Social and Behavioral Sciences

Decision Making Limitations From Communication Barriers In Government Structures In Chinese Rural Energy Projects, Nathan Gregory Johnson Jan 2008

Decision Making Limitations From Communication Barriers In Government Structures In Chinese Rural Energy Projects, Nathan Gregory Johnson

Retrospective Theses and Dissertations

Field research was conducted in the Li Cheng District (about 1,200 km 2) of Shan Dong Province. Data collection occurred during a two-week period in July 2006. At that time, seven villages represented all relevant sites in the district that contained gasification technologies. Small-group interviews with village leaders, station managers, and community members were conducted locally. Contact with external government agencies and technology scientists completed the set of potential stakeholders.;This study analyzes the failure of state-owned energy development initiatives in China. Communication barriers in bureaucratic structures and culturally prescribed patterns of interaction were revealed as inhibiting information transfer ...


Reference Models For Network Trace Anonymization, Shantanu Gattani Jan 2008

Reference Models For Network Trace Anonymization, Shantanu Gattani

Retrospective Theses and Dissertations

Network security research can benefit greatly from testing environments that are capable of generating realistic, repeatable and configurable background traffic. In order to conduct network security experiments on systems such as Intrusion Detection Systems and Intrusion Prevention Systems, researchers require isolated testbeds capable of recreating actual network environments, complete with infrastructure and traffic details. Unfortunately, due to privacy and flexibility concerns, actual network traffic is rarely shared by organizations as sensitive information, such as IP addresses, device identity and behavioral information can be inferred from the traffic. Trace data anonymization is one solution to this problem. The research community has ...


The Effects Of Farmer Attitudes And Farm Management Practices On Soil Quality: A Study In Cherokee County, Iowa, Amber D. Anderson Mba Jan 2008

The Effects Of Farmer Attitudes And Farm Management Practices On Soil Quality: A Study In Cherokee County, Iowa, Amber D. Anderson Mba

Retrospective Theses and Dissertations

This study seeks to relate farmer attitudes, perceptions, and management characteristics to field soil quality and laboratory fertility indicators. Farmer interviews were conducted to document recent practices on the farm as well as farmer attitudes about farming. To obtain soil quality measures, both the Natural Resource Conservation Service's field soil quality kit and laboratory tests were employed. Sites from the eastern half of Cherokee County, Iowa, were selected.;Key considerations of this study included farmer practices of renting versus owning land and organic or synthetic nitrogen application. Additional farmer data, including attitudes about farming, are used in this analysis ...


Impacts Of Mass Media Coverage Of The Economy During Normal Times And Recessions On The Index Of Consumer Confidence Using Time Series Analysis And Granger Causal Analysis, Lishan Su Jan 2008

Impacts Of Mass Media Coverage Of The Economy During Normal Times And Recessions On The Index Of Consumer Confidence Using Time Series Analysis And Granger Causal Analysis, Lishan Su

Retrospective Theses and Dissertations

The level of consumer sentiment influences decision making of policy makers, and therefore it is important to examine if media have powerful impacts on consumer sentiment. Based on the theories of business cycles and second-level agenda-setting, this study applies Granger causal analysis and time series analysis to explore the causal relationships among economic reporting by media, consumer sentiment and the real state of the economy embodied in Business Week, the Index of Consumer Confidence (CCI) and the Standard & Poor's 500 (S&P 500). The results indicate that interpretation by media have only limited effects on the level of consumer ...


Situating Digital Tools Through Ubiquitous Virtuality: Confluences Of Art, Architecture, And Activity In Hci, Romeu Luiz De Castro Bessa Jan 2008

Situating Digital Tools Through Ubiquitous Virtuality: Confluences Of Art, Architecture, And Activity In Hci, Romeu Luiz De Castro Bessa

Retrospective Theses and Dissertations

Over the last twenty years computer engineers introduced concepts such as "ubiquitous computing", "embodied virtualization" (Weiser, 1991), "embodied interaction" (Harrison and Dourish 1996), "tangible bits" (Ishii and Ulmer, 1997), and "seamful interweaving" (Chalmers and Galani, 2004) in an attempt to describe and explain the increased embedding of computer technology into designed objects and environments, and to emphasize the crucial agency of the human mind and body in Human-Computer Interaction (HCI). Since the mid-1990s the apparent 'dissolving' of computers and sensors into ordinary and extraordinary environments is the focus of research and concern across the humanities, social sciences, and engineering as ...


Ethnic-Identity Intensity As A Moderator Of The Technology Acceptance Model And Its Antecedents, Marcus Anthony Alexander Jan 2008

Ethnic-Identity Intensity As A Moderator Of The Technology Acceptance Model And Its Antecedents, Marcus Anthony Alexander

Retrospective Theses and Dissertations

The goal of this dissertation is oriented to study the motivation of minorities to adopt and learn new, innovative technologies. The primary research question: is there some reason the African-American experience is driving certain sub-groups of the population to the wrong side of the digital divide? To examine this, I introduce ethnic identity as a moderating variable to a leftward extended technology acceptance model (TAM). Additionally, both components of the classic TAM (ease of use and usefulness) are divided into two antecedents: (1) ease of use - (a) trait efficacy and (b) state efficacy and (2) usefulness (completely replaced by) - (a ...


Gis Modeling Of Urbanization Impacts On Natural Resources, Dakota County, Minnesota, Lan Wei Jan 2007

Gis Modeling Of Urbanization Impacts On Natural Resources, Dakota County, Minnesota, Lan Wei

Retrospective Theses and Dissertations

This research focused on the impacts of urbanization in natural resources and land-cover changes due to urban development in Dakota County, Minnesota. An existing planning guide, the 2030 Regional Development Framework (2030 RDF) for the Twin Cities Metro Area, was analyzed and employed as a reference in this research. Geographic information systems (GIS) technology was used to help determine characteristics of urban land-cover changes, such as population change, land cover changes, and the environmental impacts on natural resources caused by urban development. Furthermore, land suitability modeling was utilized to analyze possible future development, from the perspectives of urban expansion and ...


Ai Loom: A Generic Development Framework For Multi-Agent Systems Ideally Suited For Virtual Worlds, Joshua Luke Brown Jan 2007

Ai Loom: A Generic Development Framework For Multi-Agent Systems Ideally Suited For Virtual Worlds, Joshua Luke Brown

Retrospective Theses and Dissertations

This thesis discusses the use of a multiagent system as a framework for the development of a distributed virtual world. The research has resulted in the development of a distributed generic multiagent system called AI Loom and a prototype distributed virtual world called Plane. The discussion in this thesis focuses on the approach taken and the discussions made in the design and implementation of both of these technologies.


Restricting Wireless Network Access Within The Classroom, Andrew Daniel Buschbom Jan 2007

Restricting Wireless Network Access Within The Classroom, Andrew Daniel Buschbom

Retrospective Theses and Dissertations

Wireless Local Area Networks (WLANs) are fast becoming the networks of choice. With the availability of cheap wireless solutions, WLANs are seeing exponential growth which is expected to continue in the years to come. Over 50% of college classrooms have wireless network availability. Instructors have discovered that along with the benefits of WLANs there are also many students misusing the wireless network during class. This paper provides a solution to the multiple access point problem and proposes a system that can be used to control wireless network access in the classroom. The wireless network control system is based off of ...


The Endangered Species Act, Local Power And Contested Issues On The Rural-Urban Interface, Kristen Marie Corey Jan 2007

The Endangered Species Act, Local Power And Contested Issues On The Rural-Urban Interface, Kristen Marie Corey

Retrospective Theses and Dissertations

This research project examines some of the effects that implementing the Endangered Species Act has on a rapidly growing community. This case study focuses on the eastern Nebraska saline wetlands near Lincoln in the Little Salt Creek watershed - home to the endangered Salt Creek tiger beetle. With the listing of the Salt Creek tiger beetle on the Federal Endangered Species list in 2005, the beetle has emerged as the central figure in a debate dividing those who wish to develop and those who aspire to protect these rare saline wetlands. Ethnographic data are used to study this situation. In-person interviews ...


Topics In Pricing American Type Financial Contracts, Qiang Meng Jan 2007

Topics In Pricing American Type Financial Contracts, Qiang Meng

Retrospective Theses and Dissertations

In this thesis we study three pricing problems related to American type financial contracts: firstly, we derive a closed form upper bound for American put options. This upper bound can be used in conjunction with traditional Monte Carlo simulation, which usually generates a lower bound, to obtain a better estimate for the option price; secondly, we solve an optimal control problem and derive an optimal strategy for the owner of a stock which is subject to default risk; thirdly, we prove an ordering result for American options with a piecewise linear payoff under a family of equivalent martingale measures used ...


Socialest: An Application Of Mapping In Creation Of A Design Solution For User Driven Websites, John Vorwald Jan 2007

Socialest: An Application Of Mapping In Creation Of A Design Solution For User Driven Websites, John Vorwald

Retrospective Theses and Dissertations

The Web 2.0 paradigm relies on the user to create content for websites. This creates volumes of information that is fed to other users. There is a concern that there can be a lack of credibility and relevance of information for the user. The goal for this study is to create a prototype Web 2.0 website that allows users to submit and organize information through cognitive mapping.;The prototype website uses aspects of Kevin Lynch's cognitive mapping to allow individual users to organize content as they see fit. Information graphic concepts from Edward Tufte are applied in ...


Color Vision Screening Using Eye Movements, Natthapongs Voraphani Jan 2007

Color Vision Screening Using Eye Movements, Natthapongs Voraphani

Retrospective Theses and Dissertations

Most of color vision tests require that the participant is aware of and actively takes part in the test. While this might seem like a minor requirement, it presents the possibility that, when motivated, participants can engage in subterfuge in order to pass the test. This study introduces the use of eye movements as a covert test to detect the presence of a color deficiency without requiring explicit input. An experiment was conducted in which the results suggest that the observed differences in eye movements alone can be used as an efficient metric for detecting colorblindness using the Ishihara images ...


An Examination Of Contributing Factors To Land Use/Land Cover Change In Southern Belize And The Use Of Satellite Image Analysis To Track Changes, Marissa Lenée Moore Jan 2007

An Examination Of Contributing Factors To Land Use/Land Cover Change In Southern Belize And The Use Of Satellite Image Analysis To Track Changes, Marissa Lenée Moore

Retrospective Theses and Dissertations

Land use and land cover change analyses are important tools for planning and development decisions. Tropical deforestation has both local and global implications. One main reason for deforestation is the conversion of forest to agricultural land. This study explores influences and potential causes for agricultural expansion and deforestation within the Toledo District in southern Belize, Central America. Many factors play into the deforestation and degradation of tropical forests in this district, including social, cultural, political and economic issues, all of which need serious consideration if planners and politicians are to combat the problem. Understanding the reasons for deforestation goes hand ...


Design And Evaluation Of A Perceptually Adaptive Rendering System For Immersive Virtual Reality Environments, Kimberly Ann Weaver Jan 2007

Design And Evaluation Of A Perceptually Adaptive Rendering System For Immersive Virtual Reality Environments, Kimberly Ann Weaver

Retrospective Theses and Dissertations

This thesis presents the design and evaluation of a perceptually adaptive rendering system for immersive virtual reality. Rendering realistic computer generated scenes can be computationally intensive. Perceptually adaptive rendering reduces the computational burden by rendering detail only where it is needed. A rendering system was designed to employ perceptually adaptive rendering techniques in environments running in immersive virtual reality. The rendering system combines lessons learned from psychology and computer science. Eccentricity from the user's point of gaze is used to determine when to render detail in an immersive virtual environment, and when it can be omitted. A pilot study ...


Improving Text Clustering For Functional Analysis Of Genes, Jing Ding Jan 2006

Improving Text Clustering For Functional Analysis Of Genes, Jing Ding

Retrospective Theses and Dissertations

Continued rapid advancements in genomic, proteomic and metabolomic technologies demand computer-aided methods and tools to efficiently and timely process large amount of data, extract meaningful information, and interpret data into knowledge. While numerous algorithms and systems have been developed for information extraction (i.e. profiling analysis), biological interpretation still largely relies on biologists' domain knowledge, as well as collecting and analyzing functional information from various public databases. The goal of this project was to build a text clustering-based software system, called GeneNarrator, for functional analysis of genes (microarray experiments);GeneNarrator automatically collected MEDLINE citations for a list of genes as ...


Essays On Electricity Transmission Investment And Financial Transmission Rights , Wenzhuo Shang Jan 2006

Essays On Electricity Transmission Investment And Financial Transmission Rights , Wenzhuo Shang

Retrospective Theses and Dissertations

The U.S. electric power industry has been going through fundamental restructuring and realignment since the 1990's. Many issues and problems have emerged during the transition, and both economists and engineers have been looking for the solutions fervently. In this dissertation, which consists primarily of three essays, we apply economics theory and techniques to the power industry and address two related issues, transmission investment and financial transmission rights (FTRs). The first essay takes the decentralized perspective and investigates the efficiency attribute of market-based transmission investment under perfect competition. We clarify, for the first time, the nature of the externality ...


Testing Financial And Real Market Operations In Restructured Electricity Systems: Four Theoretical And Empirical Studies , Junjie Sun Jan 2006

Testing Financial And Real Market Operations In Restructured Electricity Systems: Four Theoretical And Empirical Studies , Junjie Sun

Retrospective Theses and Dissertations

To facilitate the U.S. wholesale electric power restructuring process and promote competitive market outcomes, in April 2003 the U.S. Federal Energy Regulatory Commission (FERC) proposed a complicated market design called the Wholesale Power Market Platform (WPMP) for common adoption by all U.S. wholesale power markets. Despite the fact that versions of the WPMP have been widely implemented in many states, strong opposition to the WPMP persists among some industry stakeholders due largely to a perceived lack of adequate performance testing. In this dissertation, I apply analytical, statistical and agent-based computational simulation tools to analyze and test financial ...


The Discursive Coding Of Software: A Study Of The Relationship Between Stability And Change, Jennifer Helene Maher Jan 2006

The Discursive Coding Of Software: A Study Of The Relationship Between Stability And Change, Jennifer Helene Maher

Retrospective Theses and Dissertations

Software has become an integral part of most people's everyday lives. Though discussions of software in the field of rhetoric have traditionally taken an instrumentalist approach that seeks to increase the effective use of software, a critical turn has established the need to examine the ideological signification of software. I argue that one way we can do so is to examine the social practices that symbolically constitute software to reveal how software is discursively coded, and how, consequently, users of software are themselves discursively coded. To this end, I examine the discourse of those primarily responsible for the design ...


An Analysis Of The Iowan Angler's Fishing License Renewal Decision, Ryan R. French Jan 2006

An Analysis Of The Iowan Angler's Fishing License Renewal Decision, Ryan R. French

Retrospective Theses and Dissertations

The number of annual fishing licenses sold in Iowa has been in decline for two decades and has limited the amount of funds available to the Iowa Department of Natural Resources for fisheries management. The Iowa DNR is focused on reversing this trend through targeted marketing and efficient management of fishing resources. An analysis of Iowa anglers is performed with these goals in mind using past surveys and current customer data. The product of this analysis is a model which predicts whether a past customer will renew their license in the upcoming year. A logit model is developed using license ...


Integration Of Remote Sensing And Crop Growth Modeling For Nitrogen Management Decision Support In Corn , Kelly Robert Thorp Jan 2006

Integration Of Remote Sensing And Crop Growth Modeling For Nitrogen Management Decision Support In Corn , Kelly Robert Thorp

Retrospective Theses and Dissertations

This dissertation describes efforts to move toward a completely integrated remote sensing and crop growth modeling tool for developing precision nitrogen management recommendations for corn. Aerial hyperspectral remote sensing imagery collected throughout the 2004 growing season was used to estimate corn plant stand density, and a machine vision system was used to map corn population on the ground. Multiple linear regression analysis was used to assess the ability of all combinations of three reflectance bands to estimate corn plant population at resolutions of 2 m, 6 m, and 10 m. Coefficients of multiple determination of up to 0.82 were ...


Algorithms And Procedures To Analyze Physiological Signals In Psychophysiological Research, Joset Amy Etzel Jan 2006

Algorithms And Procedures To Analyze Physiological Signals In Psychophysiological Research, Joset Amy Etzel

Retrospective Theses and Dissertations

This dissertation presents analytical techniques which allow more information to be derived from psychophysiological data than possible with traditional methods. The techniques include an implemented algorithm for chest strain-gauge respiration signal analysis and a permutation testing method for evaluating changes over time in physiological signals. These methods are applied to three data sets, each examining physiological correlates of emotional experience. In the first study physiological correlates of moods induced using music were identified, although respiration entrainment confounds the issue of whether mood or the music caused the observed patterns. The second study examined physiological responses while subjects watched an emotion-inducing ...


The Structural Organization Of Cbnrm In Botswana , Kutlwano Mulale Jan 2005

The Structural Organization Of Cbnrm In Botswana , Kutlwano Mulale

Retrospective Theses and Dissertations

The devolution of natural resource management to local community groups is a dominant theme in contemporary discussion of common property natural resource management. Throughout much of Africa and other parts of the developing world Community Based Natural Resource Management (CBNRM) programs are being implemented. Though governments in Africa and other parts of the developing world embrace the idea of CBNRM, the actual process of devolution of natural resource management to local community groups is problematic. In some countries, like Zimbabwe for instance, the central government devolved natural resource management to district councils which are themselves arms of the central government ...


Rationality And Environmental Justice: The Visual Rhetoric Of A Culture At Risk , Tom Bowers Jan 2005

Rationality And Environmental Justice: The Visual Rhetoric Of A Culture At Risk , Tom Bowers

Retrospective Theses and Dissertations

Scholars in rhetoric have recently sought to expand their understanding of social movements and the public sphere by integrating studies of visual rhetoric. For scholars exploring the rhetoric of social movements and the public sphere, the environmental movement provides a fruitful avenue of research by which to consider the role of visual rhetoric in changing social consciousness. Drawing on a methodology that views social movements through a rhetorical lens, I explore how the visual rhetoric of the environmental justice movement challenges corporate practices and discourses that shape public perceptions of sustainable development and industry's commitment to open communication. In ...


Insuring Uncertainty In Value-Added Agriculture: Ethanol, Nicholas David Paulson Jan 2004

Insuring Uncertainty In Value-Added Agriculture: Ethanol, Nicholas David Paulson

Retrospective Theses and Dissertations

A wide variety of insurance products are currently available for agricultural producers to insure against yield or price risks in the markets for the raw commodities they produce. Value-added enterprises, such as ethanol production, have become increasingly popular among farmers over the last decade; however, insurance against declines in the value-added portion of their crops is not yet available. This paper outlines the development of an insurance product aimed at corn producers who are members of an ethanol production cooperative. The product mimics the gross margin level of a typical ethanol production facility, and has the potential to provide producers ...


The Economic Potential Of Switchgrass As A Viable Biofuel Alternative, Jennifer E. Reutzel Jan 2004

The Economic Potential Of Switchgrass As A Viable Biofuel Alternative, Jennifer E. Reutzel

Retrospective Theses and Dissertations

To be commercially viable as a bioenergy feedstock, switchgrass must be cost-competitive. Switchgrass production and delivery costs are calculated for the Chariton Valley Switchgrass Biomass Project located in the Chariton Valley, Iowa. Sensitivity analyses are performed to determine which variables have the greatest impact on cost. Switchgrass production costs would require higher than expected market prices, and therefore various incentive payment options are considered. The incentive payments attempt to encapsulate the positive environmental attributes from the production of switchgrass as well as using switchgrass as a clean energy coal substitute. A modified CRP payment, carbon payment, and green tag payment ...


Recreation Demand: On-Site Sampling And Responsiveness Of Trip Behavior To Physical Water Quality Measures , Kevin Joseph Egan Jan 2004

Recreation Demand: On-Site Sampling And Responsiveness Of Trip Behavior To Physical Water Quality Measures , Kevin Joseph Egan

Retrospective Theses and Dissertations

Valuing the improvement of water quality in Iowa lakes is the objective of this dissertation. In the first two essays, the focus is combining revealed preference and stated preference data from an intercept survey at a northcentral Iowa lake. In the first essay, the contingent behavior trips which are contingent on the price (i.e. travel cost) of the recreation trip are combined with observed trips. However, since this data set was collected on-site, the primary purpose of the first essay is to consider controlling for on-site sampling with a panel data set. A count data model is employed, specifically ...


Land Preservation Decisions: Theoretical And Empirical Analysis , Shikha Marwah Jan 2004

Land Preservation Decisions: Theoretical And Empirical Analysis , Shikha Marwah

Retrospective Theses and Dissertations

There is a great concern that human actions are leading to increased rates of extinction of species. Ecologists have pointed out that the most important threat to wildlife comes from habitat alteration. The rapidly increasing human population and the resulting pressing demand for food and living space are pushing highly diverse natural areas into agriculture and other alternative uses. Recognizing this, the Federal agencies and private organizations, such as the Nature Conservancy, are becoming increasingly engaged in programs for conservation of species, where habitat restoration is an important component. However, this conservation is costly and there is uncertainty in the ...


Corn Rootworms (Coleoptera: Chrysomelidae) In Space And Time , Yong-Lak Park Jan 2003

Corn Rootworms (Coleoptera: Chrysomelidae) In Space And Time , Yong-Lak Park

Retrospective Theses and Dissertations

Spatial dispersion is a main characteristic of insect populations. Dispersion pattern provides useful information for developing effective sampling and scouting programs because it affects sampling accuracy, efficiency, and precision. Insect dispersion, however, is dynamic in space and time and largely dependent upon interactions among insect, plant and environmental factors. This study investigated the spatial and temporal dynamics of corn rootworm dispersion at different spatial scales by using the global positioning system, the geographic information system, and geoStatistics and Probability; Egg dispersion pattern was random or uniform in 8-ha cornfields, but could be aggregated at a smaller scale. Larval dispersion pattern ...


Establishment Of A High Accuracy Geoid Correction Model And Geodata Edge Match , Ruifeng Xi Jan 2003

Establishment Of A High Accuracy Geoid Correction Model And Geodata Edge Match , Ruifeng Xi

Retrospective Theses and Dissertations

This research has developed a theoretical and practical methodology for efficiently and accurately determining sub-decimeter level regional geoids and centimeter level local geoids to meet regional surveying and local engineering requirements. This research also provides a highly accurate static DGPS network data pre-processing, post-processing and adjustment method and a procedure for a large GPS network like the state level HRAN project. The research also developed an efficient and accurate methodology to join soil coverages in GIS ARE/INFO.;A total of 181 GPS stations has been pre-processed and post-processed to obtain an absolute accuracy better than 1.5cm at 95 ...