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Articles 6631 - 6660 of 12362

Full-Text Articles in Geography

Geoscientists-In-The-Park Summer Internship Mapping Shoreline Change With The National Park Service, Michael P. Endicott May 2017

Geoscientists-In-The-Park Summer Internship Mapping Shoreline Change With The National Park Service, Michael P. Endicott

Sustainability and Social Justice

This project paper details the activities carried out as a Geologist/GIS Specialist in the Gateway National Recreation Area as a part of the Geoscientists-In-The-Park internship program. The focus of this position was on supporting the geomorphological monitoring efforts of the National Park Service. This was accomplished through a combination of field data collection, GIS analysis, report writing, and project work. By the end of the internship, substantial progress was made to the formation of Gateway’s Annual 1D and 2D report for 2015-2016, field data were collected for the 2016 summer season, changes in geomorphology were explored and summarized for the …

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No. 10: The Hungry Cities Food Purchases Matrix: A Measure Of Urban Household Food Security And Food System Interactions, Jonathan Crush, Cameron Mccordic May 2017

No. 10: The Hungry Cities Food Purchases Matrix: A Measure Of Urban Household Food Security And Food System Interactions, Jonathan Crush, Cameron Mccordic

Hungry Cities Partnership

Recent theoretical work has suggested that urban food security is the result of food system interactions. This work highlights the challenge of assessing household-level food insecurity and relating it to the broader food system. One priority is to develop food security metrics that incorporate household interactions with the food system retail environment. The Hungry Cities Food Purchases Matrix (HCFPM) is one such metric that has been developed for situating household food sourcing behaviour within the urban food system. The matrix has been successfully administered in a number of cities in the Global South by the Hungry Cities Partnership. This paper …

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The Fight Against Botanical Invaders: Summer Internship With The Montana Conservation Corps And The U.S. Forest Service, Bryan S. Buttigieg May 2017

The Fight Against Botanical Invaders: Summer Internship With The Montana Conservation Corps And The U.S. Forest Service, Bryan S. Buttigieg

Sustainability and Social Justice

This paper aims to synthesize and reflect upon my internship with the Montana Conservation Corps, and the U.S. Forest Service during the summer of 2016. The primary responsibilities as an intern under the USFS’s Vegetation Manager included eradicating and monitoring invasive weeds within the Hebgen Lake Ranger District, in West Yellowstone, MT. I gained a wealth of knowledge on how invasive plants take control of landscapes throughout Montana specifically. This opportunity provided me with the chance to develop both hands-on and GIS-based conservation efforts. The following chapters review my summer internship by diving deeper into the structural organization of the …

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Development Of A Multiband Remote Sensing System For Determination Of Unsaturated Soil Properties, Cyrus D. Garner May 2017

Development Of A Multiband Remote Sensing System For Determination Of Unsaturated Soil Properties, Cyrus D. Garner

Graduate Theses and Dissertations

A multiband system including active microwave sensing and visible-near infrared reflectance spectroscopy was developed to measure unsaturated soil properties in both field and laboratory environments. Remote measurements of soil volumetric water content (θv), soil water matric potential (ψ), and soil index properties (liquid limit [LL], plastic limit [PL], and clay fraction [CF]) were conducted. Field-based measurement of θv was conducted using a ground-based radar system and field measurements within 10 percentage points of measurements acquired with traditional sampling techniques were obtained. Laboratory-based, visible and near infrared spectroscopy was found to be capable of obtaining empirical, soil specific regression functions (partial …

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The Spatial Ordering Of Nabataea: An Integrated Analysis Of The Geography, Architecture, And Morphology Of Nabataean Petra, Christopher Clifton Angel May 2017

The Spatial Ordering Of Nabataea: An Integrated Analysis Of The Geography, Architecture, And Morphology Of Nabataean Petra, Christopher Clifton Angel

Graduate Theses and Dissertations

The Nabataean city of Petra is well known for its sandstone architecture and rock-hewn funerary landscape. Over the last few decades, numerous studies examined their history, culture, art, and architecture. The few studies that assessed the urban space of Petra focused on the functional properties of individual architectural forms and their nominal placement within the overall landscape. This study focused on the spatial configurations of architecture as relational to the dynamics of Nabataean politics and ritual where shifts in social order manifested similar shifts in spatial order which in turn produced and reproduced forms of social order. The production of …

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Spatial Variability Of Seedling Disease Pressure In Cotton Fields, Kyle Douglas Wilson May 2017

Spatial Variability Of Seedling Disease Pressure In Cotton Fields, Kyle Douglas Wilson

Graduate Theses and Dissertations

Seedling diseases are important factors in cotton stand establishment, and seedling disease pathogens are widespread in fields in Arkansas. Little is known about the variability of seedling disease pressure within fields. With expanded adoption of site-specific management and other precision agriculture approaches, cotton producers are increasingly interested in predicting seedling disease pressure, particularly in spatially variable fields. The cotton seedling disease pathogens include the soilborne pathogens Thielaviopsis basicola, Rhizoctonia solani, Pythium spp., and Fusarium spp. These pathogens can survive in soil for long periods and, and when the environment is conducive, these pathogens can act individually or in combination to …

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Assessing Landslide Susceptibility With Gis Using Qualitative And Quantitative Methods In Knox County, Nebraska, Christian J. Cruz May 2017

Assessing Landslide Susceptibility With Gis Using Qualitative And Quantitative Methods In Knox County, Nebraska, Christian J. Cruz

Department of Geography: Dissertations, Theses, and Student Research

This thesis assesses landslide susceptibility using data from LiDAR DEMs, land cover, and soil surveys. Data were assessed quantitatively through Bayesian logistic regression within a geographic information system (GIS) and statistical software to produce a landslide susceptibility map. The study area exhibits moderate relief where bluffs along the Missouri River valley gradually recede into rolling loess-mantled hills further to the south and southeast in Knox County. The six factors used to determine susceptibility to landslides are: land cover, parent material, slope aspect, slope curvature slope degree, and soil series. My findings show an increase in slope is the most significant …

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The Role Of Sulfur Dioxide In Stratospheric Aerosol Formation Evaluated By Using In Situ Measurements In The Tropical Lower Stratosphere, A. W. Rollins, T. D. Thornberry, L. A. Watts, P. Yu, K. H. Rosenlof, M. Mills, E. Baumann, F. R. Giorgetta, T. V. Bui, M. Höpfner, P. F. Bernath May 2017

The Role Of Sulfur Dioxide In Stratospheric Aerosol Formation Evaluated By Using In Situ Measurements In The Tropical Lower Stratosphere, A. W. Rollins, T. D. Thornberry, L. A. Watts, P. Yu, K. H. Rosenlof, M. Mills, E. Baumann, F. R. Giorgetta, T. V. Bui, M. Höpfner, P. F. Bernath

Chemistry & Biochemistry Faculty Publications

Stratospheric aerosols (SAs) are a variable component of the Earth's albedo that may be intentionally enhanced in the future to offset greenhouse gases (geoengineering). The role of tropospheric-sourced sulfur dioxide (SO2) in maintaining background SAs has been debated for decades without in situ measurements of SO2 at the tropical tropopause to inform this issue. Here we clarify the role of SO2 in maintaining SAs by using new in situ SO2 measurements to evaluate climate models and satellite retrievals. We then use the observed tropical tropopause SO2 mixing ratios to estimate the global flux of …

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Sacral Variability In Tailless Species: Homo Sapiens And Ochotona Princeps, Robert G. Tague May 2017

Sacral Variability In Tailless Species: Homo Sapiens And Ochotona Princeps, Robert G. Tague

Faculty Publications

Homo sapiens is variable in number of sacral vertebrae, and this variability can lead to obstetrical complication. This study uses the comparative method to test the hypothesis that sacral variability in H. sapiens is associated with absence of a tail. Three species of lagomorphs are studied: Ochotona princeps (N = 271), which is tailless, and Lepus californicus (N = 212) and Sylvilagus audubonii (N = 206), which have tails. Results show that O. princeps has (1) higher diversity index for number of sacral vertebrae (0.49) compared to L. californicus (0.25) and S. audubonii (0.26) and (2) significantly higher percentage of …

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Mountain Bike Use On The Tahoe Rim Trail: An Analysis Of Management Practices In Restricted Use Areas, Christopher M. Binder May 2017

Mountain Bike Use On The Tahoe Rim Trail: An Analysis Of Management Practices In Restricted Use Areas, Christopher M. Binder

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This project presents research into the historic and contemporary use of mountain bikes in restricted use areas on the Tahoe Rim Trail and examines management approaches to increase compliance with existing regulations and advisories. Data from geomagnetic trail counters is utilized to gain insight into where and when such use occurs, while archival and contemporary sources of information are consulted to establish the context of mountain bike use on the trail. The project concludes with specific, actionable recommendations for trail managers, with information regarding likely outcomes and costs included in the analysis.

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Impact Of High-Resolution Topographic Mapping On Beach Morphological Analyses Based On Terrestrial Lidar And Object-Oriented Beach Evolution, Xuelian Meng, Xukai Zhang, Rodolfo Silva, Chunyan Li, Lei Wang May 2017

Impact Of High-Resolution Topographic Mapping On Beach Morphological Analyses Based On Terrestrial Lidar And Object-Oriented Beach Evolution, Xuelian Meng, Xukai Zhang, Rodolfo Silva, Chunyan Li, Lei Wang

Faculty Publications

This research applied terrestrial LiDAR for laboratory beach evolution experiments to quantify the impact of resolution on topographic mapping and change analyses. The multi-site registration and multi-Temporal scanning processes produced high accuracy (-0.002 - 0.003 m) topographic models in a wave tank environment. Morphological analyses based on surface change and profiles showed that models of all resolutions were capable of capturing major sediment changes in relatively smooth areas. However, higher resolution models were necessary in areas with rough surfaces and sudden elevation changes, while coarser resolution models smoothed the roughness and underestimated feature height (e.g., peaks and troughs). Decreasing resolutions …

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A Retro Development In Education: Evaluating The Feasibility Of Integrating Place-Based Education Into Mississippi Curriculum Standards, Colby K. Mcclain May 2017

A Retro Development In Education: Evaluating The Feasibility Of Integrating Place-Based Education Into Mississippi Curriculum Standards, Colby K. Mcclain

Honors Theses

This thesis evaluates the feasibility of integrating place-based environmental education activities from Think Green, Take Action: Books and Activities for Kids into the Mississippi Department of Education’s (MDE) Frameworks for Science and Social Studies for K-5. As children develop and experience the world, their ability to understand and interpret the surrounding environments expand; however, Mississippi schools are not focused on experiential environmental education, even though experiencing and understanding the surrounding environment is vital in fostering eagerness to learn. Due to a growing disconnect between humans and the natural world, this thesis examined 37 place- and environment-based activities for children, sixteen …

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Oil, Space, And National Imaginaries : Discursive Productions By Standard Oil New Jersey Post Wwii., Michael Poindexter May 2017

Oil, Space, And National Imaginaries : Discursive Productions By Standard Oil New Jersey Post Wwii., Michael Poindexter

Electronic Theses and Dissertations

In a moment of self-representation, Standard Oil New Jersey commissioned a large photo ‘documentary’ project of nearly 80,000 images taken between the years 1943 to 1950. Produced for publication and exhibition, images captured “how oil seeped into every joint” of America, and displayed a specific landscape for post WWII economies. While a stable and centralized industry was ever more tied to the state’s idea of national security, Standard Oil needed a public relations project to address social concerns of big oil. This singular perspective on oil space is problematic. Community histories and social relations are seen through Standard Oil’s own …

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An Analysis Of The Relationship Between Snowpack And Groundwater Across Utah Watersheds., Samuel Wright May 2017

An Analysis Of The Relationship Between Snowpack And Groundwater Across Utah Watersheds., Samuel Wright

Electronic Theses and Dissertations

This thesis examined what type of relationship existed between snow water equivalence (SWE) volume and groundwater elevation within six sub-watersheds in Utah. Data was gathered on SWE from seventeen SNOTEL sites and groundwater elevation data was gathered from six continuously monitored groundwater wells. This data was gathered for January through May for 2011, 2013, and 2014 in order to represent the water conditions that were above average, below average, and average respectively. Using MLR formulas the total SWE for each sub-watershed was determined for each year/month. Afterwards a correlation analysis was performed to determine if any association existed between SWE …

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Colorectal Cancer Fit Screening In The Hope Vi Population Of Jefferson County, Kentucky., Jeffrey D. Stone May 2017

Colorectal Cancer Fit Screening In The Hope Vi Population Of Jefferson County, Kentucky., Jeffrey D. Stone

Electronic Theses and Dissertations

Using pre-post survey data collected from 209 randomly selected African American people from the population of former residents of Clarksdale and Sheppard Square public housing areas, this study explores the relationship between individual characteristics and colorectal cancer screening behavior, measured by the uptake of the Fecal Immunochemical Test (FIT) and by prior colorectal screening, while controlling for neighborhood factors and geographic proximity to healthcare facilities. This particular public housing population is of interest because of their relocation from the downtown area, where healthcare facilities are within walking distances, to other public housing units either in large apartment complexes or scattered …

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Stream Sedimentation Patterns In An Urban Beaver System: Fanno Creek, Oregon, Alexandra Joan Santora May 2017

Stream Sedimentation Patterns In An Urban Beaver System: Fanno Creek, Oregon, Alexandra Joan Santora

Geography Masters Research Papers

Beaver activities can cause drastic changes to hydrogeomorphic processes by impounding waterways through the construction of dams, trapping sediments and reducing the downstream sediment load. The presence of beaver is increasing in urban areas. Urban streams exhibit hydrogeomorphic processes distinct from natural systems because of changes in land cover that alter hydrology. This case study was developed as part of an effort to understand the sedimentation patterns of a beaver impounded urban stream in Beaverton, Oregon. Twelve sediment samples were collected and processed for organic matter content and particle size and sediment depths were calculated using GIS software from data …

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Environmental Justice And Gis: A Comparison Of Three Gis Methods For Estimating Vulnerable Population Exposed To Brownfield Pollution In Portland, Oregon, Kyle Goodman May 2017

Environmental Justice And Gis: A Comparison Of Three Gis Methods For Estimating Vulnerable Population Exposed To Brownfield Pollution In Portland, Oregon, Kyle Goodman

Geography Masters Research Papers

This project compares three GIS techniques that estimate populations who are potentially affected by environmental contamination in Portland, Oregon. All three GIS techniques utilize polygon containment to estimate populations potentially exposed to pollutants based on block level census data. In this study, multiple buffer distances at half-mile increments were used across all three techniques. Circular Euclidean distance buffers surrounding a known contaminated property, such as documented brownfields, approximate the contamination zone. Accurate estimates for populations exposed to harmful environmental conditions could provide a better understanding of environmental justice issues. The specific research questions were: 1) Are the population estimates sensitive …

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Environmental And Climatic Constraints On Large-Scale Camelina Production In Eastern Arkansas, Benjamin Robert Tracy May 2017

Environmental And Climatic Constraints On Large-Scale Camelina Production In Eastern Arkansas, Benjamin Robert Tracy

Graduate Theses and Dissertations

Camelina sativa is a cold weather crop that is typically grown in semi-arid environments in the Western United States, usually as a spring crop, but sometimes during the winter. Research analyzing climate data and soil hydrology is important to better understand the environmental and terrain conditions necessary for Camelina farming wherever it is proposed for large-scale production. This study focused on various conditions and constraints pertaining to the potential for Camelina as a crop biofuel in Eastern Arkansas. Due to interest in the economic potential of crop biofuels in this area, and in particular the low input costs for Camelina, …

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A Spatial Analysis Of The Relationship Between Violent Neighborhood Crime Rates And Alternative Gentrification Indicators In Louisville, Ky (2010-2016)., George A. Noonan May 2017

A Spatial Analysis Of The Relationship Between Violent Neighborhood Crime Rates And Alternative Gentrification Indicators In Louisville, Ky (2010-2016)., George A. Noonan

Electronic Theses and Dissertations

This study analyzes recent findings analyzing coffee shops as alternative indicators of gentrification and the spatial relationship to violent crime. This thesis seeks to add to this literature by providing additional alternative gentrification indicators such as breweries, distilleries and wineries. The change in number of coffee shops, breweries, distilleries and wineries may impact crime rates and multiyear average incidences of homicide and robbery in the city of Louisville, KY. The first hypothesis states that gentrification decreases multiyear average robberies per census tract from 2010 to 2016. The second hypothesis states that gentrification decreases multiyear average homicides per census tract from …

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Governing The Urban Water Commons : Essays On Collaborative Policy Networks In A Polycentric Ecology Of Urban Water Policy Games., Emmanuel Frimpong Boamah May 2017

Governing The Urban Water Commons : Essays On Collaborative Policy Networks In A Polycentric Ecology Of Urban Water Policy Games., Emmanuel Frimpong Boamah

Electronic Theses and Dissertations

Governing social-ecological systems, such as the urban water commons, is a multi-scale and multi-sector (polycentric) human-environment process. This dissertation interrogates this process by situating itself within the Ecology of Games Framework by Norton Long (and updated by Mark Lubell) and the literature on polycentric governance by the Bloomington School of Political Economy. The dissertation’s three essays 1) offer both theoretical and methodological means to enact polycentric public economies within the ecology of games framework, and 2) explicate the conditions under which interoganizational collaboration is fostered within a polycentric ecology of policy games in governing the Middle Rio Grande urban watershed. …

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Remote Sensing Insights Into Storage Capacities Among Plains Village Horticulturalists, Adam Wiewel May 2017

Remote Sensing Insights Into Storage Capacities Among Plains Village Horticulturalists, Adam Wiewel

Graduate Theses and Dissertations

Maize was a fundamental component of the diet and economy of Middle Missouri Plains Village groups, sedentary farmers with settlements along the Missouri River during the last millennia. More than a century of study has contributed to our understanding of agricultural production among these peoples, but little effort has been made to consider temporal variation in production. Such an understanding is crucial to examining changes that occurred before and after the arrival of colonists and their trade goods in the seventeenth century. Plains archaeologists have suggested that the storage capacity of Middle Missouri villages increased during the sixteenth through the …

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“A Theoretical Model For Critical Geographies Of Gentrification: A Comparative Analysis Of Globalization In Two Gay Villages”, Spencer Nelson May 2017

“A Theoretical Model For Critical Geographies Of Gentrification: A Comparative Analysis Of Globalization In Two Gay Villages”, Spencer Nelson

Geography Honors Projects

Abstract: The role of gay villages in gentrification has long been contemplated yet their relationship to the global circulation of capital is understudied. This thesis sheds light on this phenomenon through an urban political ecology of gentrification and provides a new model of critical geographies of gentrification. The model is illustrated through ethnographic research in the two gay villages of De Waterkant in Cape Town, South Africa, and Loring Park in Minneapolis, Minnesota. The relationship between gentrification and globalization is analyzed through the four lenses that bring flows of financial capital, culture, technology, and ideology into focus and offers a …

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Sensors Everywhere: Using Satellites And Mobile Phones To Reduce Information Uncertainty In Human Rights Crisis Research, Christoph Koettl May 2017

Sensors Everywhere: Using Satellites And Mobile Phones To Reduce Information Uncertainty In Human Rights Crisis Research, Christoph Koettl

Genocide Studies and Prevention: An International Journal

This article critically reviews the use of ICTs for human rights crisis research. While focusing on two specific technologies—satellite imagery and mobile phone technology—it proposes a general framework for analyzing the added value of ICTs. The author suggests that their added value in mass atrocities research arises from their ability to reduce information uncertainty, a challenge that is exacerbated in the digital age. This is different from delivering “truth”, an inaccurate description that only leads to unfulfilled expectations and hopes. The article is written from a practitioner’s perspective, drawing from the work of a global human rights watchdog, thus avoiding …

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Niche Modeling For The Giant Panda, Ailuropoda Melanoleuca, And The Original Panda, Ailurus Fulgens: Habitat Preferences And Evolutionary Consequences, Lauren M. Lyon May 2017

Niche Modeling For The Giant Panda, Ailuropoda Melanoleuca, And The Original Panda, Ailurus Fulgens: Habitat Preferences And Evolutionary Consequences, Lauren M. Lyon

Electronic Theses and Dissertations

The well-known symbol for conservation, the giant panda bear, and the original red panda have been forced into remote habitats due to anthropogenic disturbance, making ecological study difficult. Therefore the first known species distribution model was created to predict the most likely areas of occurrence within the known range of these elusive animals. These models were then projected onto North America and evaluated against existing breeding programs. Additionally, the close proximity of the Gray Fossil Site and the discovery of the most complete fossil red panda specimens in the world allowed ecomorphological comparisons between the modern red panda, Ailurus fulgens …

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Progressive Education In Appalachia: East Tennessee State Normal School And Appalachian State Normal School, Holly Heacock May 2017

Progressive Education In Appalachia: East Tennessee State Normal School And Appalachian State Normal School, Holly Heacock

Undergraduate Honors Theses

In this thesis, I am examining how East Tennessee State Normal School in East Tennessee and Appalachian State Normal School in Western North Carolina interpreted progressive education differently in their states. This difference is that East Tennessee State began as a state funded school to educate future teachers therefore their school and their curriculum was more rounded and set to a structured schedule. Appalachian State Normal School was initially founded to educate the uneducated in the “lost provinces” therefore, curriculum was even more progressive than East Tennessee State’s – based strongly on the practices of farming, woodworking, and other practical …

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The Community Rating System: Assessing Indicators Of Community Participation, A Dasymetric And Sovi Approach, Zachary P. Landis May 2017

The Community Rating System: Assessing Indicators Of Community Participation, A Dasymetric And Sovi Approach, Zachary P. Landis

Theses and Dissertations

The National Flood Insurance Program (NFIP) was established to provide affordable insurance to property owners and encourage communities to adopt and enforce floodplain management, primarily through the Community Rating System (CRS). The CRS awards points to communities for adopting a variety of activities in support of floodplain management. One area of interest in the CRS program is understanding differences in the types of communities participating and the degree of their participation. Research on the NFIP’s CRS tends to focus on community program participation in reducing flood losses and indicators of participation. Much of this research was performed prior to 2013 …

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Representing The Relationships Between Field Collected Carbon Exchanges And Surface Reflectance Using Geospatial And Satellite-Based Techniques, Alexandria G. Mccombs May 2017

Representing The Relationships Between Field Collected Carbon Exchanges And Surface Reflectance Using Geospatial And Satellite-Based Techniques, Alexandria G. Mccombs

Theses and Dissertations

Carbon exchanges between the atmosphere and the land surface vary in space and time, and are highly dependent on land cover type. It is important to quantify these exchanges to understand how landscapes affect the carbon budget, which will have a significant impact on future climate change and will inform climate change projections. However, how do you represent regional carbon exchanges from a single meteorological station? A single observing station will represent a limited area around the station, but each individual observation will sample a different physical land area in time due to varying wind speeds, wind direction, and atmospheric …

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Seeing Community Through The Trees: Characterizing Resident Response To Urban-Tree Planting Initiatives, Eli Goldman May 2017

Seeing Community Through The Trees: Characterizing Resident Response To Urban-Tree Planting Initiatives, Eli Goldman

Sustainability and Social Justice

Urban tree planting initiatives have become common across cities in the United States. In order to advocate for sustainable urban forests, managers of urban planting initiatives must adopt a strong community framework, which includes community values in reforestation efforts. Clark University researchers conducted interviews and surveys with residents in six central Massachusetts cities and towns to assess why residents value urban trees and to characterize public response to reforestation efforts. Results indicate residents had positive experiences with tree planting programs, are most likely to value urban trees for aesthetic reasons, and commonly associate change in neighborhood character with Asian Longhorned …

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Gis Specialist 2016 Internship With Cdm Smith In Boston, Massachusetts, Suzanne L. Meek May 2017

Gis Specialist 2016 Internship With Cdm Smith In Boston, Massachusetts, Suzanne L. Meek

Sustainability and Social Justice

This report provides a detailed experience of my internship with CDM Smith during the summer of 2016. This was a formal 12-week internship that was extended an additional two weeks due to my success in the first few weeks. My title was listed as a GIS Specialist Intern. My responsibilities included applying GIS technologies to construction, water, and energy projects, digitizing various locations for cities and private clients, FEMA projects, and street light audits in two different towns in New England.

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Dynamic Nearest Neighbor Queries In Euclidean Space, Sarana Nutanong, Mohammed Eunus Ali, Egemen Tanin, Kyriakos Mouratidis May 2017

Dynamic Nearest Neighbor Queries In Euclidean Space, Sarana Nutanong, Mohammed Eunus Ali, Egemen Tanin, Kyriakos Mouratidis

Research Collection School Of Computing and Information Systems

Given a query point q and a set D of data points, a nearest neighbor (NN) query returns the data point p in D that minimizes the distance DIST(q,p), where the distance function DIST(,) is the L2norm. One important variant of this query type is kNN query, which returns k data points with the minimum distances. When taking the temporal dimension into account, the k NN query result may change over a period of time due to changes in locations of the query point and/or data points.

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