Digital Commons Network^™

Sensitive Detection Of Novel Effects And Characteristic Signal Structure Of Higher Harmonic Detection In Wavelength Modulation Spectroscopy, Mohammad Amir Khan

Electrical & Computer Engineering Theses & Dissertations

We discuss experimental and theoretical results of absorption features of the oxygen A-band transitions when synchronous detection at higher harmonics using Wavelength Modulation Spectroscopy (WMS) is performed. A key aspect of structure higher harmonic detection is discussed. It is shown that the signal magnitude and spectral locations of turning points and zero crossings of WMS signal demonstrate key signatures of collision dynamics of gaseous specie parameters and lineshape parameters. In addition, it is also shown that these salient features provide sensitive probes for any changes in the gas environment or lineshape parameters. We discuss several advantages and subtle physical effects …

Computing Medoids In Large Spatial Datasets, Kyriakos Mouratidis, Dimitris Papadias, Spiros Papadimitriou

Research Collection School Of Computing and Information Systems

In this chapter, we consider a class of queries that arise in spatial decision making and resource allocation applications. Assume that a company wants to open a number of warehouses in a city. Let P be the set of residential blocks in the city. P represents customer locations to be potentially served by the company. At the same time, P also comprises the candidate warehouse locations because the warehouses themselves must be opened in some residential blocks.

Computing Travel Time When The Exact Address Is Unknown: A Comparison Of Point And Polygon Zip Code Approximation Methods, Ethan M. Berke, Xun Shi

Dartmouth Scholarship

Travel time is an important metric of geographic access to health care. We compared strategies of estimating travel times when only subject ZIP code data were available.Using simulated data from New Hampshire and Arizona, we estimated travel times to nearest cancer centers by using: 1) geometric centroid of ZIP code polygons as origins, 2) population centroids as origin, 3) service area rings around each cancer center, assigning subjects to rings by assuming they are evenly distributed within their ZIP code, 4) service area rings around each center, assuming the subjects follow the population distribution within the ZIP code. We used …

Geography Newsletter, 1969-2009, University Of Northern Iowa. Department Of Geography.

Geography Newsletter

Inside this issue:

-- Alumni Newsletter 1969-2009
-- News From the Head
-- Departments Anniversary
-- Department News and Activities
-- Department Faculty
-- Student News
-- Alumni News

The Potential Of The Synergistic Use Of Passive And Active Remote Sensing Measurements For The Validation Of A Regional Dust Model, V. Amiridis, Menas Kafatos, M. Perez, S. Kazadzis, E. Gerasopoulos, R. E. Mamouri, A. Papayannis, P. Kokkalis, E. Giannakaki, S. Basart, I. Daglis, C S. Zerefos

Mathematics, Physics, and Computer Science Faculty Articles and Research

A long-lasting Saharan dust event affected Europe on 18–23 May 2008. Dust was present in the free troposphere over Greece, in height ranges between the surface and approximately 4–5 km above sea level. The event was monitored by ground-based CIMEL sunphotometric and multi-wavelength combined backscatter/Raman lidar measurements over Athens, Greece. The dust event had the maximum of its intensity on 20 May. Three-dimensional dust spatial distribution over Greece on that day is presented through satellite synergy of passive and active remote sensing using MODIS and CALIPSO data, respectively. For the period under study, the ground-based measurements are used to characterize …

The ‘Benchmark Glacier’ Concept – Does It Work? Lessons From The North Cascade Range, Usa, Andrew G. Fountain, Matthew J. Hoffman, Frank Granshaw, Jon L. Riedel

Geology Faculty Publications and Presentations

Benchmark glaciers were established in many alpine areas during the 1960s as part of the International Hydrological Decade to represent ‘typical’ mass and energy processes on glaciers in different climatic regions around the world. These glaciers have received new interest in the past decade because they are used to infer the contribution of alpine glacier wastage to global sea-level rise. We compare South Cascade Glacier, the benchmark glacier for the northwest contiguous USA, and four other secondary glaciers, against the topographic, area and mass changes of 321 glaciers in the surrounding region. Results show that South Cascade Glacier is unusually …

Temporal And Spatial Stability Of Anopheles Gambiae Larval Habitat Distribution In Western Kenya Highlands, Li Li, Ling Bian, Laith Yakob, Guofa Zhou, Guiyun Yan

Political Science & Geography Faculty Publications

Background: Localized mosquito larval habitat management and the use of larvicides have been proposed as important control tools in integrated malaria vector management programs. In order to optimize the utility of these tools, detailed knowledge of the spatial distribution patterns of mosquito larval habitats is crucial. However, the spatial and temporal changes of habitat distribution patterns under different climatic conditions are rarely quantified and their implications to larval control are unknown.

Results: Using larval habitat data collected in western Kenya highlands during both dry and rainy seasons of 2003-2005, this study analyzed the seasonal and inter-annual changes in the spatial …

Risk Management Of Commercial Overland Food Transport And Distribution, Lucas Charles Hartman Geadelmann

Dissertations and Theses @ UNI

The purpose of this research was to study the contemporary safety issues related to the overland transport of perishable food items via semi-truck and trailer. An anonymous survey instrument consisting of 20 questions was developed in order to examine semi-truck driver habits. The questions pertained to truck driver safety and subsequent food safety matters related to the perishable food items contained within the trailers. The paper surveys were distributed to the semi-truck driving employees of two food distributors located in the upper Midwest, which had agreed to voluntarily participate in the study. A total of 90 surveys were completed and …

The Law V. The Stranger: Language Interpretation And Legal Space In Lexington, Ky, Karen S. Kinslow

University of Kentucky Master's Theses

This thesis examines the role of interpretation in legal encounter in Lexington, Kentucky. Through an analysis of legal and interpretation practices, this study seeks to ascertain how these practices may affect non-native or low-proficiency English speakers’ (LLPs) experiences with both federal and local laws and legal spaces. This place-based study involves in-depth qualitative research. Using the methodological framework of feminist geo-jurisprudence, this research contributes to our understanding of 1) the limits of the publicity of legal space and, more specifically, the ways in which language barriers can prevent legal inclusion; 2) local strategies and tactics for dealing with the challenges …

Cookie Monsters: Seeing Young People’S Hacking As Creative Practice, Gregory T. Donovan, Cindi Katz

Publications and Research

This paper examines the benefits and obstacles to young people’s open-ended and unrestricted access to technological environments. While children and youth are frequently seen as threatened or threatening in this realm, their playful engagements suggest that they are self-possessed social actors, able to negotiate most of its challenges effectively. Whether it is proprietary software, the business practices of some technology providers, or the separation of play, work, and learning in most classrooms, the spatial-temporality of young people’s access to and use of technology is often configured to restrict their freedom of choice and behavior. We focus on these issues through …

Interannual Variability Of Photosynthesis Across Africa And Its Attribution, Christopher A. Williams, Niall P. Hanan, Ian Baker, G. James Collatz, Joseph Berry, A. Scott Denning

Geography

Africa is thought to be a large source of interannual variability in the global carbon cycle, only vaguely attributed to climate fluctuations. This study uses a biophysical model, Simple Biosphere, to examine in detail what specific factors, physiological (acute stress from low soil water, temperature, or low humidity) and biophysical (low vegetation radiation use), are responsible for spatiotemporal patterns of photosynthesis across the African continent during the period 1982-2003. Acute soil water stress emerges as the primary factor driving interannual variability of photosynthesis for most of Africa. Southern savannas and woodlands are a particular hot spot of interannual variability in …

Integrating Landscapes That Have Experienced Rural Depopulation And Ecological Homogenization Into Tropical Conservation Planning, Aerin L. Jacob, Ismael Vaccaro, Raja Sengupta, Joel N. Hartter, Colin A. Chapman

Geography

If current trends of declining fertility rates and increasing abandonment of rural land as a result of urbanization continue, this will signal a globally significant transformation with important consequences for policy makers interested in conservation planning. This transformation is presently evident in a number of countries and projections suggest it may occur in the future in many developing countries. We use rates of population growth and urbanization to project population trends in rural areas for 25 example countries. Our projections indicate a general decline in population density that has either occurred already (e.g., Mexico) or may occur in the future …

Water Quality Impacts From Agricultural Land-Use In The Karst Groundwater Basin Of Qingmuguan, Chongqing, China, Ted W. Baker

Masters Theses & Specialist Projects

Karst regions are composed of soluble rock, often limestone, which leads to the formation of fissures, sinkholes and water flow conduits such as caves. Pollutants in karst waters tend to be quickly directed and concentrated into these subsurface conduits. As a result of this and other factors, water resources are especially sensitive to contamination and pollution in karst areas. Pollutant concentrations going into fluvial systems travelling through the subsurface in karst areas are often very similar to the concentrations arriving at outlets such as springs. Areas connected by karst conduit flows must be distinctly determined and special attention should be …

Simulation Modeling Of Karst Aquifer Conduit Evolution And Relations To Climate, John D. Broome

Masters Theses & Specialist Projects

ABSTRACT Karst regions of the world that receive relatively similar amounts of precipitation display a wide variety of landscapes. It has been suggested (Groves and Meiman, 2005) that climates exhibiting larger discrete storm events have more dissolving power and consequently higher rates of conduit growth than climates with more uniform precipitation distributions. To study this concept, a computer program “Cave Growth” was developed that modeled the growth of a cross-section of a cave passage under dynamic flow and chemical conditions. A series of 46 simulation datasets were created to represent different climatic conditions. These simulations had the same total annual …

Geography And Capacity Of Alternative Fuel Production 1999 - 2006: The Case Of Solar And Wind, James Pace

All-Inclusive List of Electronic Theses and Dissertations

Access to reliable, low cost energy production is key to the wellbeing of our economy, standard ofliving, and national security. As the cost of energy from conventional resources has increased, efforts have started to convert to alternative, renewable sources of energy production. Currently, wind and solar technologies are the best options for an alternative source of energy. Data on wind and solar energy resources, the availability of incentives, and the existence of renewable portfolio standards (RPS) were used to determine the most plausible influencing factors of wind and solar energy production. Maps generated from these data point to a relationship …

Contention And Ambiguity: Mining And The Possibilities Of Development, Anthony J. Bebbington, Leonith Hinojosa, Denise Bebbington, Maria Luisa Burneo, Ximena Warnaars

Geography

The last decade and a half has witnessed a dramatic growth in mining activity in many developing countries. This article reviews these recent trends and describes the debates and conflicts they have triggered. The authors review evidence regarding debates on the resource curse and the possibility of an extraction-led pathway to development. They then describe the different types of resistance and social mobilization that have greeted mineral expansion at a range of geographical scales, and consider how far these protests have changed the relationships between mining and political economic change. The conclusions address how far such protests might contribute to …

Historic Maps Meet Google Maps : The University Of Louisville's Kentucky Maps Collection., Terri L. Holtze, Rachel I. Howard

Faculty and Staff Scholarship

Online access to historic maps, enhanced by JPEG2000 format and, in some cases, Google Maps, has proved popular with scholars, students, community members, and librarians. This article will discuss the planning, scanning, metadata creation, and Google mapping of the University of Louisville's Kentucky Maps Collection (http://digital.library.louisville.edu/cdm/landingpage/collection/maps/).

Demographic, Economic, And Social Transformations In Bronx Community District 9: Parkchester, Unionport, Soundview, Castle Hill, And Clason Point, 1990 - 2006, Astrid S. Rodríguez

Center for Latin American, Caribbean, and Latino Studies

Introduction: This report analyzes demographic and socioeconomic characteristics among the five largest Latino nationality groups during 1990-2006 in the NYC Community District 9 of the borough of the Bronx, which comprises the neighborhoods of Parkchester, Unionport, Soundview, Castle Hill, and Clason Point.

Methods: Data on Latinos and other racial/ethnic groups were obtained from the U.S. Census Bureau American Community Survey, reorganized for public use by the Minnesota Population Center, University of Minnesota, IPUMSusa. Cases in the dataset were weighted and analyzed to produce population estimates.

Results: Puerto Ricans are the largest Latino subgroup in the Bronx Community District 9, accounting …

Washington Heights/Inwood Demographic, Economic, And Social Transformations 1990 – 2005 With A Special Focus On The Dominican Population, Laird W. Bergad

Center for Latin American, Caribbean, and Latino Studies

Introduction: This report examines demographic and socioeconomic factors concerning New York City based Latinos in Washington Heights and Inwood – particularly Dominicans.

Methods: Data on Latinos and other racial/ethnic groups were obtained from the U.S. Census Bureau American Community Survey, reorganized for public use by the Minnesota Population Center, University of Minnesota, IPUMSusa. Cases in the dataset were weighted and analyzed to produce population estimates.

Results: Since the 1980s the upper Manhattan neighborhood of Washington Heights/Inwood has been transformed by the immigration of a large Latino population of whom Dominicans have been the most prominent national group. Latinos made up …

The Latino Population Of New York City, 2007, Laura Limonic

Center for Latin American, Caribbean, and Latino Studies

Introduction: This report provides and in-depth demographic profile of Latinos in 2007 New York City.

Methods: Data on Latinos and other racial/ethnic groups were obtained from the U.S. Census Bureau American Community Survey, reorganized for public use by the Minnesota Population Center, University of Minnesota, IPUMSusa. Cases in the dataset were weighted and analyzed to produce population estimates.

Results: New York City’s Latino population increased by 2.5% between 2006 and 2007. Puerto Ricans remained the largest national group among all Latinos (778,628) and 33.3% of the total Hispanic population of the City, an increase of .9% since 2006. Even though …

Social Movements And The Dynamics Of Rural Territorial Development In Latin America, Anthony J. Bebbington, Ricardo Abramovay, Manuel Chiriboga

Geography

This special section brings together 4 of the 12 studies conducted within a research program analyzing the relationships among social mobilization, governance, and rural development in contemporary Latin America. The introduction gives an overview of the contemporary significance of social movements for rural development dynamics in the region, and of the principal insights of the section papers and the broader research program of which they were a part. This significance varies as an effect of two distinct and uneven geographies: the geography of social movements themselves and the geography of the rural political economy. The effects that movements have on …

La Libertad De La Ciudad, David Harvey

Publications and Research

David Harvey explora aquí la relación existente entre el problema de la reubicación del excedente de capital y las transformaciones del espacio urbano a una escala cada vez mayor. En este artículo, escrito antes de que fuera declarada la crisis económica mundial, Harvey ofrece un análisis espacial que anticipa dicha crisis y analiza las consecuencias que la continuidad del modelo económico vigente tendrá para el futuro de la vida urbana.

In this paper David Harvey explores the existing relation between the problem of surplus capital allocation and the increasing transformations of urban space. The paper, written before the world economic …

Finding A "Disappearing" Nontimber Forest Resource: Using Grounded Visualization To Explore Urbanization Impacts On Sweetgrass Basketmaking In Greater Mt. Pleasant, South Carolina, Patrick T. Hurley, Angela C. Halfacre, Norm S. Levine, Marianne K. Burke

Environment and Sustainability Faculty Publications

Despite growing interest in urbanization and its social and ecological impacts on formerly rural areas, empirical research remains limited. Extant studies largely focus either on issues of social exclusion and enclosure or ecological change. This article uses the case of sweetgrass basketmaking in Mt. Pleasant, South Carolina, to explore the implications of urbanization, including gentrification, for the distribution and accessibility of sweetgrass, an economically important nontimber forest product (NTFP) for historically African American communities, in this rapidly growing area. We explore the usefulness of grounded visualization for research efforts that are examining the existence of "fringe ecologies" associated with NTFP. …

Background And Study Concerning Water Wave Effects On Airborne Imagery, Charles R. Bostater

Ocean Engineering and Marine Sciences Faculty Publications

This paper describes ongoing research and initial results regarding collection of airborne imagery for detection of submerged features in optically shallow water types. The approach is to utilize land surface, water surface and submerged or in-situ line targets of various types during the airborne flights or fixed platforms. The imagery collected by the airborne sensing systems is processed in concept to correct for the presence of the water surface wave effects and water column effects. The correction approach is based upon calculation of a residual image between either (a) the observed submerged target image and the non-submerged image or (2) …

From Migrant Surveys To Migrants’ Stories: Reflections On Research On And In Southern Africa, Belinda Dodson

Migration and Ethnic Relations Colloquium Series

No abstract provided.

La Mondialisation Et Les Croyants: Des Effets De La Mondialisation Sur Les Communautés Chrétiennes = Globalization And Believers: Globalization’S Effects On Christian Communities, Carrie Lee Tallichet

Independent Study Project (ISP) Collection

This research aimed to explore the different manifestations of globalization’s impact on Catholic and Protestant student movements in Toulouse, France. To accomplish this investigation, the researcher sought the opinions of students who participate regularly in religious groups regarding the cultural diversity of their group and their concept of a global Christian community. Based on information gathered in interviews, the researcher concluded, though not definitively, that Catholic and Protestant student groups both experience the effects of globalization, but each in a manner in relation with their faith’s organizational structure: Catholic students felt close ties with other Catholic groups worldwide despite the …

“Left In The Forest And Forgotten” Land Policy And The Plight Of The Benet, Anne Dirkse

Independent Study Project (ISP) Collection

In carrying out my independent study project on the issue of the Benet being displaced by the creation of Mount Elgon National Park, I had three main objectives in my mind. My first objective was to investigate and gain a balanced perspective of the effects of the Benet’s most recent eviction from Mount Elgon National Park. Secondly, I wished to analyze the government’s role as a duty bearer in compensating and resettling the Benet for their land. Lastly, I wished to explore the Benet Community’s options for redress within the legal system.

The methods I utilized included a literature review, …

Modeling Geographic Population Dispersion Utilizing Geospatial Information System Environment Agents In An Agent Based Model, Karl D. Liebert

Computational Modeling & Simulation Engineering Theses & Dissertations

New capabilities in agent based model (ABM) environments are opening the door to the creation of ABM that may incorporate high-quality, real world environment data in the form of Geospatial Information System (GIS) files . In the past, GJS environments were only possible through extensive software development efforts focused on specific model applications.

This thesis explores the value and issues of using GIS data to provide an ABM environment. It examines the ability of ABM development environments (DE) to support GIS environment data. The selected ABM DE is then used to model population behavior in an environment defined by authoritative …

Spatial Analyses And Repletion Of Gargathy Coastal Lagoon, Loreto Herraiz Gomez

OES Theses and Dissertations

Coastal lagoons and bays vary in shape and size in response to antecedent topography, geologic processes and sea level rise. Variations in shape and environmental conditions of coastal basins are believed to influence the distribution of benthic sub-environments and the exchange of water with the ocean and other adjacent coastal systems. Gargathy Inlet and its coastal lagoon vary spatially from the inlet, where the greatest depths are observed, to the mainland, dominated by shallow intertidal areas, colonized by marsh. Hypsographic and hydro-hypsographic analyses of Gargathy's coastal lagoon were the primary techniques applied to understand the relative distribution of the benthic …

Geo-Rectification Of Aerial Images For Detecting Changes In Terrain, Diana Vincent

Electrical & Computer Engineering Theses & Dissertations

With increasing terrorist attacks around the world, detection of hidden bombs like IEDs (Improvised Explosive devices) has become very important. The main aim of this thesis is to develop an automatic change detection system to detect changes in terrain. It is mainly used in military applications for protection of military convoys. In order to detect the presence of IED's, an Unmanned Aerial Vehicle (UAV) is flown over a proposed convoy route to develop a baseline scene. Prior to the launch of the convoy the UA V is flown again over the same route to detect any significant scene changes that …