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Articles 31 - 50 of 50
Full-Text Articles in Geographic Information Sciences
Exploring Local Environmental Factors Influencing Geographic Distribution Of Black-Legged Tick Questing Activity, Chong Di
Theses and Dissertations
The deer tick (Ixodes scapularis or I. scapularis), also known as the black-legged tick, is the primary vector that transmits Lyme Disease (LD) in Northeastern United States. To contain the geographic expansion of Lyme disease ticks across the US in recent decades, ecological studies have been conducted to understand the biotic and abiotic environmental factors affecting tick activity. We observed in preliminary surveys that the tick host-seeking activity varies across small local areas. The primary objective of this project is to identify the environmental factors that impact deer tick questing activities at the micro-geographic scale. From 2017-2018, we …
Constructing A Data-Based Mortality Profile For Avian Tower Kills At Telecommunication Towers In Illinois, Rachel Dipietro
Constructing A Data-Based Mortality Profile For Avian Tower Kills At Telecommunication Towers In Illinois, Rachel Dipietro
Theses and Dissertations
During spring and fall seasons, Neotropical migratory passerines travel nocturnally across the Western Hemisphere between their wintering and breeding grounds, often encountering man-made threats. One hazard that has gained considerable publicity in recent decades is the communication tower. While there have been many tower kill studies recorded, there has been no attempt at predicting the risk of towers based on their different attributes (e.g., height, type of light, landscape placement) spatially on a regional scale. The objective of this study was to create seasonal mortality profile maps in GIS for Illinois, based on tower attributes combined with key factors such …
Velocity Model For Co2 Sequestration In The Southeastern United States Atlantic Continental Margin, John Ollmann
Velocity Model For Co2 Sequestration In The Southeastern United States Atlantic Continental Margin, John Ollmann
Theses and Dissertations
The sequestration of carbon dioxide (CO2) is emerging as a major player in offsetting anthropogenic greenhouse gas emissions. With 40% of the United States’ anthropogenic CO2 emissions originating in the southeast, characterizing potential CO2 sequestration sites is vital to reducing the United States’ emissions. The overall goal of this research project, funded by the Department of Energy, is to estimate the CO2 storage potential for the Southeastern United States Atlantic Continental Margin. Previous studies find storage potential in the Atlantic continental margin. Up to 16 Gt and 175 Gt of storage potential are estimated for the Upper Cretaceous and Lower …
The Catalyst Effect Of Historic Preservation: A Spatial Analysis Of The Impact Of Historic District Designation On Housing Renovations In New York City, Ali R. Mostafa
Theses and Dissertations
The constraints on property use along with the economic merits of historic districts are critical points in the debate over preservation policies. Improving the existing housing stock is a substantial economic activity and a significant part of the nation’s overall construction industry. The purpose of this study is to present an empirical analysis of the relationship between historic district designation and renovation decisions. The results of the analysis found that historic preservation does not inhibit the renovation activity of single-family homeowners. However, contrary to the claims made by proponents, it does not give a powerful incentive for owners in undesignated …
Assessment Of The Socio-Environmental Impacts Of The Urban Expansion Using Gis And Remote Sensing In The City Of Guayaquil, Ecuador., Erika P. Jimenez Rivera
Assessment Of The Socio-Environmental Impacts Of The Urban Expansion Using Gis And Remote Sensing In The City Of Guayaquil, Ecuador., Erika P. Jimenez Rivera
Theses and Dissertations
This thesis investigates the impacts of the urban expansion from 1990 to 2010 in Guayaquil, Ecuador using geospatial technologies. It incorporates census and land cover data to identify the social and environmental repercussions through Hot Spot Analysis, land cover classification, and Markov chains model.
Understanding 1-D Vertical Flux Dynamics In A Low-Gradient Stream: An Assessment Of Stage As A Control Of Vertical Hyporheic Exchange, Frances Claire Harris
Understanding 1-D Vertical Flux Dynamics In A Low-Gradient Stream: An Assessment Of Stage As A Control Of Vertical Hyporheic Exchange, Frances Claire Harris
Theses and Dissertations
Little Kickapoo Creek (LKC) is a low-gradient, third-order perennial stream with headwaters in Bloomington, IL. The objective of this study is to characterize vertical one-dimensional (1-D) flux rates in the top 150 cm of the streambed, test the viability of a heat tracing method in a low-gradient area, and determine the relationship between stage and 1-D vertical flux rates. In 2009, six wells were installed along the thalweg of the stream in a 25-meter stretch spaced at 5-meter intervals. Each well recorded temperature at five separate depths logging at 15-minute0 intervals from February 2009 to March 2010: 30, 60, 90, …
Quantifying Transit Access In New York City: Formulating An Accessibility Index For Analyzing Spatial And Social Patterns Of Public Transportation, Maxwell S. Siegel
Quantifying Transit Access In New York City: Formulating An Accessibility Index For Analyzing Spatial And Social Patterns Of Public Transportation, Maxwell S. Siegel
Theses and Dissertations
This paper aims to analyze accessibility within New York City’s transportation system through creating unique accessibility indices. Indices are detailed and implemented using GIS, analyzing the distribution of transit need and access. Regression analyses are performed highlighting relationships between demographics and accessibility and recommendations for transit expansion are presented.
Women Workin’ It In Gis: A Mixed Methods Study Of Underrepresentation And The Gendered Experience Among Female Gis Practitioners, Livia M. Betancourt Mazur
Women Workin’ It In Gis: A Mixed Methods Study Of Underrepresentation And The Gendered Experience Among Female Gis Practitioners, Livia M. Betancourt Mazur
Theses and Dissertations
Through novel empirical research, this thesis explores the experience of women working in the professional field of geographic information systems (GIS), adding to GIS literature, as well as to academic geography and wider science, technology, engineering and mathematics (STEM) discourses, addressing gaps in these bodies of knowledge.
Transportation And Sanitation Drivers Of Land Use/Land Cover Change: Loss Of The Jamaica Bay Wetlands, Margaret Joy Cytryn
Transportation And Sanitation Drivers Of Land Use/Land Cover Change: Loss Of The Jamaica Bay Wetlands, Margaret Joy Cytryn
Theses and Dissertations
This thesis presents an analysis (1830-2014) of the historical events of land use/land cover change in the Jamaica Bay estuary, identification of the agents of change, and a perspective on the potential drivers of transportation and sanitation in land use/land cover change.
Using Spatiotemporal Methods To Fill Gaps In Energy Usage Interval Data, Kristin K. Graves
Using Spatiotemporal Methods To Fill Gaps In Energy Usage Interval Data, Kristin K. Graves
Theses and Dissertations
Researchers analyzing spatiotemporal or panel data, which varies both in location and over time, often find that their data has holes or gaps. This thesis explores alternative methods for filling those gaps and also suggests a set of techniques for evaluating those gap-filling methods to determine which works best.
Effects Of Physical Characteristics Of Urban Storm Sewersheds On Water Quality In Bloomington, Il, Alicia Terese O'Hare
Effects Of Physical Characteristics Of Urban Storm Sewersheds On Water Quality In Bloomington, Il, Alicia Terese O'Hare
Theses and Dissertations
Increasing urbanization has consequences for surface water quality. Stormwater is a large component of urban water degradation that is poorly understood. Precipitation is quickly transported via underground pipes, from the land to the stream without following water's natural flow path. Studies have correlated detention ponds with improved water quality and impervious surface cover with degraded water quality. However, other physical characteristics within a storm sewer shed including the presence of sump pumps, area and pipe miles may also affect the stormwater quality. We chose 18 storm sewer systems in Bloomington, IL. We measured pH, temperature, conductivity, dissolved oxygen, chloride, nitrate, …
Precision Navigation Using Pre-Georegistered Map Data, Frederick C. Webber
Precision Navigation Using Pre-Georegistered Map Data, Frederick C. Webber
Theses and Dissertations
Navigation performance in small unmanned aerial vehicles (UAVs) is adversely affected by limitations in current sensor technology for small, lightweight sensors. Because most UAVs are equipped with cameras for mission-related purposes, it is advantageous to utilize the camera to improve the navigation solution. This research improves navigation by matching camera images to a priori georegistered image data and combining this update with existing image-aided navigation technology. The georegistration matching is done by projecting the images into the same plane, extracting features using the techniques Scale Invariant Feature Transform (SIFT) [5] and Speeded-Up Robust Features (SURF) [3]. The features are matched …
Performance Enhancements Of Ranging Radio Aided Navigation, Patric J. Ernsberger
Performance Enhancements Of Ranging Radio Aided Navigation, Patric J. Ernsberger
Theses and Dissertations
Determining the position of team members is always useful information, whether it is a team of firefighters fighting a blaze or combatants clearing a building in the field. This information becomes even more decisive for the people responsible for their safety. To accomplish this in areas denied Global Navigation Satellite System (GNSS), such as around buildings or in steep valleys, alternative methods must be used. Radio ranging systems have been a part of the navigation solution for years. They unfortunately have poor performance in certain areas, such as inside buildings, due to multipath and other errors. To improve the position …
Internet Protocol Geolocation: Development Of A Delay-Based Hybrid Methodology For Locating The Geographic Location Of A Network Node, John M. Roehl
Internet Protocol Geolocation: Development Of A Delay-Based Hybrid Methodology For Locating The Geographic Location Of A Network Node, John M. Roehl
Theses and Dissertations
Internet Protocol Geolocation (IP Geolocation), the process of determining the approximate geographic location of an IP addressable node, has proven useful in a wide variety of commercial applications. Commercial applications of IP Geolocation include market research, redirection for performance enhancement, restricting content, and combating fraud. The potential for military applications include securing remote access via geographic authentication, intelligence collection, and cyber attack attribution. IP Geolocation methods can be divided into three basic categories based upon what information is used to determine the geographic location of the given IP address: 1) Information contained in databases, 2) information that is leaked during …
Geospatial Informational Security Risks And Concerns Of The U.S. Air Force Geobase Program, Scott A. Bryant
Geospatial Informational Security Risks And Concerns Of The U.S. Air Force Geobase Program, Scott A. Bryant
Theses and Dissertations
Technological advancements such as Geospatial Information Systems (GIS) and the Internet have made it easier and affordable to share information, which enables complex and time sensitive decisions to be made with higher confidence. Further, advancements in information technology have dramatically increased the ability to store, manage, integrate, and correlate larger amounts of data to improve operational efficiency. However, the same technologies that enable increased productivity also provide increased capabilities to those wishing to do harm. Today’s military leaders are faced with the challenge of deciding how to make geospatial information collected on military installations and organizations available to authorized communities …
Bias In Severe Thunderstorm And Tornado Warnings Issued By The National Weather Service In The Doppler Radar Era: A Spatial-Temporal Evaluation, Gary S. Votaw
Theses and Dissertations
A climatology of severe thunderstorm (damaging wind and/or hail) and tornadoes in the United States has established the location of the areas of highest frequency of occurrence. This climatology was attained through analysis of a basic data source, that of observed events, which carries many associated biases. Among these biases is the requirement that someone be on hand to witness the event no matter what time of the day or night, the assumption that the observer had sufficient visibility to see the event clearly, and whether there was something available on location to damage. In this study I use an …
Information Technology Implementation And Sustainment Model: Data Collection Instrument, Walter K. Yazzie
Information Technology Implementation And Sustainment Model: Data Collection Instrument, Walter K. Yazzie
Theses and Dissertations
The goal of this research was to develop a data collection instrument for an existing information technology implementation and sustainment model. In 2003, a unique system dynamics model was developed at the Air Force Institute of Technology to predict the behavior of information technology implementation and sustainment (Fonnesbeck, 2003). However, no empirical data was used during the model development. In order to collect the needed empirical data, this research develops a data collection instrument for the model. The instrument was sent to 60 Air Force community planners who are currently implementing a geographical information system (Air Force GeoBase) into their …
Cross-Service Investigation Of Geographical Information Systems, Matthew H. Beverly
Cross-Service Investigation Of Geographical Information Systems, Matthew H. Beverly
Theses and Dissertations
This research investigated the armed services current uses of GIS, and asked the question whether or not a joint GIS program could benefit the DOD. An information technology implementation model was presented as a framework to implement a joint GIS program. It was found that all four armed services use GIS for forward deployments. The Army has its Combat Terrain Information System (CTIS). The Navy's digital nautical charts are a GIS. The Marine Corps has created their Geographically Linked Information Display Environment (GLIDE) program, which is similar to a map repository. Finally, the Air Force has its GeoBase program for …
Investigation Of Geobase Implementation Issues: Case Study Of Information Resource Management, Mario L. Oliver
Investigation Of Geobase Implementation Issues: Case Study Of Information Resource Management, Mario L. Oliver
Theses and Dissertations
Billions of dollars have been wasted on failed information system (IS) projects over the last decade in the private and public sectors. More specifically, the tri-service environment of the U.S. military has not implemented a single successful geospatial IS (GIS). The lack of a service-wide insertion process for GIS was cited as the most significant cause for military GIS failures. GeoBase represents the USAF's most recent GIS implementation. The GeoBase program focuses on Information Resource Management (IRM) and cultural issues. The GeoBase Sustainment Model (GSM), anecdotally developed by GeoBase leadership to reflect implementation issues and the IRM practices of the …
Remote Sensing Systems Optimization For Geobase Enhancement, Steve J. Paylor
Remote Sensing Systems Optimization For Geobase Enhancement, Steve J. Paylor
Theses and Dissertations
The U.S. Air Force is in the process of implementing GeoBase, a geographic information system (GIS), throughout its worldwide installations, Air Force GIS needs can be augmented by imagery from aerial and satellite platforms. Imagery has greatly improved over the past several years and provides high resolution coverage of features on earth. Various imagery types will significantly increase GeoBase usefulness in a range of mission requirements, Potential Air Force uses of imagery include identifying heat loss, environmental monitoring, command decision-making, and emergency response, The research develops a decision tool to determine the appropriate imagery for a given Air Force Application, …