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Faculty Publications

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Articles 181 - 210 of 371

Full-Text Articles in Geography

A Comparison Of Hominin Teeth From Lincoln Cave, Sterkfontein L/63, And The Dinaledi Chamber, South Africa, Juliet K. Brophy, Joel Irish, Steve E. Churchill, Darryl J. De Ruiter, John Hawks, Lee R. Berger May 2019

A Comparison Of Hominin Teeth From Lincoln Cave, Sterkfontein L/63, And The Dinaledi Chamber, South Africa, Juliet K. Brophy, Joel Irish, Steve E. Churchill, Darryl J. De Ruiter, John Hawks, Lee R. Berger

Faculty Publications

Prior to the recovery of Homo naledi from the Dinaledi Chamber of the Rising Star Cave system, the Middle Pleistocene fossil record in Africa was particularly sparse. With the large sample size now available from Dinaledi, the opportunity exists to reassess taxonomically ambiguous teeth unearthed at the nearby site of Sterkfontein. Teeth recovered from Lincoln Cave South and area L/63 at Sterkfontein have been considered ‘most probably Homo ergaster’ and ‘perhaps Archaic Homo sapiens’, respectively. Given the similarities shared between Lincoln Cave, area L/63, and the Dinaledi Chamber with regard to climatic/geologic depositional context and age, two teeth from the …

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Demystifying Jadeite: An Underwater Maya Discovery At Ek Way Nal, Belize, Heather Mckillop, George Harlow, April Sievert, C. Wayne Smith, Michael C. Wiemann Apr 2019

Demystifying Jadeite: An Underwater Maya Discovery At Ek Way Nal, Belize, Heather Mckillop, George Harlow, April Sievert, C. Wayne Smith, Michael C. Wiemann

Faculty Publications

Jadeite artefacts at Maya sites are normally associated with ritual and ceremonial locations, with high-quality jadeite reserved for elite objects. The discovery of a jadeite gouge with a wooden handle at a Classic Maya salt-working site submerged by sea-level rise - Ek Way Nal, Belize - is therefore unexpected and provides new information about the utilitarian use of this stone. The extremely high quality of this jadeite tool is particularly surprising, offering new insight into the Classic Maya exchange systems and the role of salt makers such as those based at Ek Way Nal.

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Monitoring 40-Year Lake Area Changes Of The Qaidam Basin, Tibetan Plateau, Using Landsat Time Series, Huiying Li, Dehua Mao, Xiaoyan Li, Zongming Wang, Cuizhen Wang Feb 2019

Monitoring 40-Year Lake Area Changes Of The Qaidam Basin, Tibetan Plateau, Using Landsat Time Series, Huiying Li, Dehua Mao, Xiaoyan Li, Zongming Wang, Cuizhen Wang

Faculty Publications

Areal changes of high-altitude inland lakes on the Qaidam Basin (QB) of the Tibetan Plateau are reliable indicators of climate change and anthropogenic disturbance. Due to the physical difficulties to access, our knowledge of the spatial patterns and processes of climatic and human impacts on the Basin has been limited. Focusing on lake area changes, this study used long-term Landsat images to map the patterns of lakes and glaciers in 1977, 1990, 2000, and 2015, and to monitor the spatially explicit changes of lakes between 1977 and 2015. Results revealed that the total number of lakes (area > 0.5 km2 ) …

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Student Led Area Measurement Assessments Using Virtual Globes And Pictometry Web-Based Interface Within An Undergraduate Spatial Science Curriculum, David Kulhavy, I-Kuai Hung, Daniel Unger, Yanli Zhang Jan 2019

Student Led Area Measurement Assessments Using Virtual Globes And Pictometry Web-Based Interface Within An Undergraduate Spatial Science Curriculum, David Kulhavy, I-Kuai Hung, Daniel Unger, Yanli Zhang

Faculty Publications

The use of Virtual Globes and Pictometry continues to expand and develop in undergraduate spatial science education. Spatial science undergraduates measured the area of 30 rectangles on the earth’s surface and compared them to Pictometry hyperspectral imagery measurements within a web-based interface and the Google Earth interface compared to ArcGIS Explorer, Map Developers and ArcMap using the ArcMap 10.5.2 interface. An analysis of variance of the absolute mean area errors (p-value of 0.009271) concluded the accuracy of the five area measurements were statistically different at the 95% confidence interval. A Tukey pair-wise test found that the Pictometry and Google Earth …

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Review Of The Herds Shot Round The World: Native Breeds And The British Empire, 1800—1900, By Rebecca Woods, Andrew Sluyter Jan 2019

Review Of The Herds Shot Round The World: Native Breeds And The British Empire, 1800—1900, By Rebecca Woods, Andrew Sluyter

Faculty Publications

No abstract provided.

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An Analysis Of The Effect Of Tooth Wear On Bovid Identification, Juliet K. Brophy, Gregory J. Matthews, George K. Thiruvathukal Jan 2019

An Analysis Of The Effect Of Tooth Wear On Bovid Identification, Juliet K. Brophy, Gregory J. Matthews, George K. Thiruvathukal

Faculty Publications

Previous research provides a method for reducing the subjectivity in taxonomic identification of species in the family Bovidae by quantifying the occlusal surface of molar teeth using elliptical Fourier analysis. In this current study, we specifically test what effect medium to late tooth wear has on the identification of bovids when using the form (size and shape) of the occlusal surface to classify specimens. To achieve this, the classification results of teeth with ≥85% of their occlusal surface (training data set) were compared with the results of teeth with 87% of the time with both Alcelaphini and Reduncini classifying correctly …

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Identification Of Experimental And Control Areas For Cctv Effectiveness Assessment—The Issue Of Spatially Aggregated Data, Adam Dabrowski, Piotr Matczak, Andrzej Wójtowicz, Michael Leitner Dec 2018

Identification Of Experimental And Control Areas For Cctv Effectiveness Assessment—The Issue Of Spatially Aggregated Data, Adam Dabrowski, Piotr Matczak, Andrzej Wójtowicz, Michael Leitner

Faculty Publications

Progress in surveillance technology has led to the development of Closed-Circuit Television (CCTV) systems in cities around the world. Cameras are considered instrumental in crime reduction, yet existing research does not unambiguously answer the question whether installing them affects the number of crimes committed. The quasi-experimental method usually applied to evaluate CCTV systems’ effectiveness faces difficulties with data quantity and quality. Data quantity has a bearing on the number of crimes that can be conclusively inferred using the experimental procedure. Data quality affects the level of crime data aggregation. The lack of the exact location of a crime incident in …

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A Comparison Of Machine Learning Techniques For Taxonomic Classification Of Teeth From The Family Bovidae, Gregory J. Matthews, Juliet K. Brophy, Maxwell Luetkemeier, Hongie Gu, George K. Thiruvathukal Nov 2018

A Comparison Of Machine Learning Techniques For Taxonomic Classification Of Teeth From The Family Bovidae, Gregory J. Matthews, Juliet K. Brophy, Maxwell Luetkemeier, Hongie Gu, George K. Thiruvathukal

Faculty Publications

This study explores the performance of machine learning algorithms on the classification of fossil teeth in the Family Bovidae. Isolated bovid teeth are typically the most common fossils found in southern Africa and they often constitute the basis for paleoenvironmental reconstructions. Taxonomic identification of fossil bovid teeth, however, is often imprecise and subjective. Using modern teeth with known taxons, machine learning algorithms can be trained to classify fossils. Previous work by Brophy et al. [Quantitative morphological analysis of bovid teeth and implications for paleoenvironmental reconstruction of plovers lake, Gauteng Province, South Africa, J. Archaeol. Sci. 41 (2014), pp. 376–388] uses …

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Mapping Soil Alkalinity And Salinity In Northern Songnen Plain, China With The Hj-1 Hyperspectral Imager Data And Partial Least Squares Regression, Lin Bai, Cuizhen Wang, Shuying Zang, Changshan Wu, Jinming Luo, Yuexiang Wu Nov 2018

Mapping Soil Alkalinity And Salinity In Northern Songnen Plain, China With The Hj-1 Hyperspectral Imager Data And Partial Least Squares Regression, Lin Bai, Cuizhen Wang, Shuying Zang, Changshan Wu, Jinming Luo, Yuexiang Wu

Faculty Publications

In arid and semi-arid regions, identifying and monitoring of soil alkalinity and salinity are in urgently need for preventing land degradation and maintaining ecological balances. In this study, physicochemical, statistical, and spectral analysis revealed that potential of hydrogen (pH) and electrical conductivity (EC) characterized the saline-alkali soils and were sensitive to the visible and near infrared (VIS-NIR) wavelengths. On the basis of soil pH, EC, and spectral data, the partial least squares regression (PLSR) models for estimating soil alkalinity and salinity were constructed. The R2 values for soil pH and EC models were 0.77 and 0.48, and the root …

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Measurement And Modeling Of The Spatiotemporal Dynamics Of Beach Surface Moisture Content, Phillip P. Schmutz, Steven L. Namikas Oct 2018

Measurement And Modeling Of The Spatiotemporal Dynamics Of Beach Surface Moisture Content, Phillip P. Schmutz, Steven L. Namikas

Faculty Publications

The spatiotemporal dynamics of surface moisture exert a significant influence on the operation of aeolian transport systems at many beaches. However, we currently lack the detailed understanding of variability in surface moisture required to incorporate it into aeolian models. This problem is addressed here through direct measurements and simulation modeling of beach surface moisture over a twelve-day period, and through quantification of the relative contributions of evaporation, condensation and groundwater inputs to surface moisture. It was found that the beach surface can be characterized spatially in terms of three moisture zones: a consistently dry zone (40%). The relative influence of …

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Impacts Of Agricultural Expansion (1910s-2010s) On Water Cycle In The Songneng Plain, Northeast China, Lijuan Zhang, Cuizhen Wang, Xiaxiang Li, Hongwen Zhang, Wenliang Li, Lanqi Jiang Jul 2018

Impacts Of Agricultural Expansion (1910s-2010s) On Water Cycle In The Songneng Plain, Northeast China, Lijuan Zhang, Cuizhen Wang, Xiaxiang Li, Hongwen Zhang, Wenliang Li, Lanqi Jiang

Faculty Publications

Agricultural expansion is one of the primary land use changes on the Earth’s surface. The Songnen Plain in Northeast China is renowned for its Black Soil and is one of the most important agricultural regions of this country. In the last century, its population increased 20-fold and excessive areas of grassland were cultivated. Based on a series of decadal land use/land cover data sets in the plain (1910s–2010s), this study simulated the water balance in each decade using the Weather Research and Forecasting (WRF) model and assessed the water effects of centurial agricultural expansion. Six variables were simulated to explain …

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Non-Gnss Smartphone Pedestrian Navigation Using Barometric Elevation And Digital Map-Matching, Daniel Broyles, Kyle J. Kauffman, John F. Raquet, Piotr Smagowski Jul 2018

Non-Gnss Smartphone Pedestrian Navigation Using Barometric Elevation And Digital Map-Matching, Daniel Broyles, Kyle J. Kauffman, John F. Raquet, Piotr Smagowski

Faculty Publications

Pedestrian navigation in outdoor environments where global navigation satellite systems (GNSS) are unavailable is a challenging problem. Existing technologies that have attempted to address this problemoften require external reference signals or specialized hardware, the extra size,weight, power, and cost of which are unsuitable for many applications. This article presents a real-time, self-contained outdoor navigation application that uses only the existing sensors on a smartphone in conjunction with a preloaded digital elevation map. The core algorithm implements a particle filter, which fuses sensor data with a stochastic pedestrian motion model to predict the user’s position. The smartphone’s barometric elevation is then …

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Spatial Assessment Of Water Quality With Urbanization In 2007-2015, Shanghai, China, Huixuan Li, Cuizhen Wang, Xiao Huang, Andrew Hug Jun 2018

Spatial Assessment Of Water Quality With Urbanization In 2007-2015, Shanghai, China, Huixuan Li, Cuizhen Wang, Xiao Huang, Andrew Hug

Faculty Publications

Shanghai, as one of the megacities and economic centers of China, is facing critical water quality challenges. This study analyzed the impact of urbanization on the water quality in Shanghai, from 2007 to 2015, using remote sensing (RS) and geographic information system (GIS) techniques. Five measurements of water quality were employed: total discharged wastewater volume, general water quality levels, dissolved oxygen (DO), permanganate, and ammonia nitrogen. The impacts of urban land-use changes on water quality were examined. An urban index was extracted from satellite image classification and was used to quantify the anthropogenic activities. In the watershed level, unit watersheds …

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Assessing Relevance Of Tweets For Risk Communication, Xiaohui Liu, Bandana Kar, Chaoyang Zhang, David M. Cochran Jun 2018

Assessing Relevance Of Tweets For Risk Communication, Xiaohui Liu, Bandana Kar, Chaoyang Zhang, David M. Cochran

Faculty Publications

Although Twitter is used for emergency management activities, the relevance of tweets during a hazard event is still open to debate. In this study, six different computational (i.e. Natural Language Processing) and spatiotemporal analytical approaches were implemented to assess the relevance of risk information extracted from tweets obtained during the 2013 Colorado flood event. Primarily, tweets containing information about the flooding events and its impacts were analysed. Examination of the relationships between tweet volume and its content with precipitation amount, damage extent, and official reports revealed that relevant tweets provided information about the event and its impacts rather than any …

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Event-Based Climatology Of Tropical Cyclone Rainfall In Houston, Texas And Miami, Florida, Jill C. Trepanier, Clay S. Tucker May 2018

Event-Based Climatology Of Tropical Cyclone Rainfall In Houston, Texas And Miami, Florida, Jill C. Trepanier, Clay S. Tucker

Faculty Publications

Tropical cyclone (TC) rainfall amounts are compared from 1950-2017 for Houston, Texas and Miami, Florida to estimate the risk of TC rain in both cities. Following the wake of Hurricanes Harvey and Irma in 2017, concern has risen over the future of raininess in these locations. Per-event rainfall amounts are aggregated using tracks taken from HURDAT, time-of-rain gathered from National Weather Service daily weather maps, and rainfall totals taken from airport monitoring stations. Risk analysis tools include descriptive statistics, time series, and return frequencies for Houston and Miami, and spatially interpolated surfaces for Hurricanes Harvey and Irma. The season duration …

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Effects Of Sea Level Rise, Land Subsidence, Bathymetric Change And Typhoon Tracks On Storm Flooding In The Coastal Areas Of Shanghai, Jun Wang, Si Yi, Mengya Li, Lei Wang, Chengcheng Song Apr 2018

Effects Of Sea Level Rise, Land Subsidence, Bathymetric Change And Typhoon Tracks On Storm Flooding In The Coastal Areas Of Shanghai, Jun Wang, Si Yi, Mengya Li, Lei Wang, Chengcheng Song

Faculty Publications

We compared the effects of three key environmental factors of coastal flooding: sea level rise (SLR), land subsidence (LS) and bathymetric change (BC) in the coastal areas of Shanghai. We use the hydrological simulation model MIKE 21 to simulate flood magnitudes under multiple scenarios created from combinations of the key environmental factors projected to year 2030 and 2050. Historical typhoons (TC9711, TC8114, TC0012, TC0205 and TC1109), which caused extremely high surges and considerable losses, were selected as reference tracks to generate potential typhoon events that would make landfalls in Shanghai (SHLD), in the north of Zhejiang (ZNLD) and moving northwards …

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Remote Sensing Of Soil Alkalinity And Salinity In The Wuyu’Er-Shuangyang River Basin, Northeast China, Lin Bai, Cuizhen Wang, Shuying Zang, Yuhong Zhang, Qiannan Hao, Yuexiang Wu Feb 2018

Remote Sensing Of Soil Alkalinity And Salinity In The Wuyu’Er-Shuangyang River Basin, Northeast China, Lin Bai, Cuizhen Wang, Shuying Zang, Yuhong Zhang, Qiannan Hao, Yuexiang Wu

Faculty Publications

The Songnen Plain of the Northeast China is one of the three largest soda saline-alkali regions worldwide. To better understand soil alkalinization and salinization in this important agricultural region, it is vital to explore the distribution and variation of soil alkalinity and salinity in space and time. This study examined soil properties and identified the variables to extract soil alkalinity and salinity via physico-chemical, statistical, spectral, and image analysis. The physico-chemical and statistical results suggested that alkaline soils, coming from the main solute Na2CO3 and NaHCO3 in parent rocks, characterized the study area. The pH and …

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Trade-Offs And Synergies Of Ecosystem Services In The Taihu Lake Basin Of China, Xuning Qiao, Yangyang Gu, Changxin Zou, Lei Wang, Juhua Luo, Xianfeng Huang Feb 2018

Trade-Offs And Synergies Of Ecosystem Services In The Taihu Lake Basin Of China, Xuning Qiao, Yangyang Gu, Changxin Zou, Lei Wang, Juhua Luo, Xianfeng Huang

Faculty Publications

Understanding the spatial interactions among multiple ecosystem services is crucial for ecosystem services management. Ecosystem services, including crop production, freshwater supply, aquatic production, net primary production, soil conservation, water conservation, flood regulation, forest recreation, were measured at 1-km grid scale covering the Taihu Lake Basin (TLB) of China. Our objective is to get a comprehensive understanding of the spatial distributions, trade-offs, synergies of multiple ecosystem services across the TLB. Our results found that: 1) majority of ecosystem services were clustered in space and had a similar spatial distribution pattern with the geographical resource endowment. Most of the landscape contributed a …

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Sustaining Suburbia Through New Urbanism: Toward Growing, Green, And Just Suburbs?, Dan Trudeau Jan 2018

Sustaining Suburbia Through New Urbanism: Toward Growing, Green, And Just Suburbs?, Dan Trudeau

Faculty Publications

This article examines the governance dynamics surrounding the development of sustainable neighborhoods in United States metropolitan contexts characterized as suburban sprawl. Drawing on original case study research of three distinct applications of New Urbanism design principles, the article argues for understanding the relative power of municipal authorities to incorporate social justice imperatives into the practice of sustainable development in suburban contexts. Moreover, key to prioritizing social imperatives is the way in which development processes respond to the “suburban ideal”, which is a view of suburbs as an exclusive bourgeois utopia that constrains the ability to connect so-called sustainable development with …

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Social Medicine And International Expert Networks In Latin America, 1930–1945, Eric D. Carter Jan 2018

Social Medicine And International Expert Networks In Latin America, 1930–1945, Eric D. Carter

Faculty Publications

This paper examines the international networks that influenced ideas and policy in social medicine in the 1930s and 1940s in Latin America, focusing on institutional networks organised by the League of Nations Health Organization, the International Labour Organization, and the Pan-American Sanitary Bureau. After examining the architecture of these networks, this paper traces their influence on social and health policy in two policy domains: social security and nutrition. Closer scrutiny of a series of international conferences and local media accounts of them reveals that international networks were not just ‘conveyor belts’ for policy ideas from the industrialised countries of the …

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Accuracy Of Unmanned Aerial System (Drone) Height Measurements, Daniel Unger, I-Kuai Hung, David Kulhavy, Yanli Zhang, Kai Busch-Peterson Jan 2018

Accuracy Of Unmanned Aerial System (Drone) Height Measurements, Daniel Unger, I-Kuai Hung, David Kulhavy, Yanli Zhang, Kai Busch-Peterson

Faculty Publications

Vertical height estimates of earth surface features using an Unmanned Aerial System (UAS) are important in natural resource management quantitative assessments. An important research question concerns both the accuracy and precision of vertical height estimates acquired with a UAS and to determine if it is necessary to land a UAS between individual height measurements or if GPS derived height versus barometric pressure derived height while using a DJI Phantom 3 would affect height accuracy and precision. To examine this question, height along a telescopic height pole on the campus of Stephen F. Austin State University (SFASU) were estimated at 2, …

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Integrating Unmanned Aircraft Systems To Measure Linear And Areal Features Into Undergraduate Forestry Education, Reid Viegut, David Kulhavy, Daniel Unger, I-Kuai Hung, Brian Humphreys Jan 2018

Integrating Unmanned Aircraft Systems To Measure Linear And Areal Features Into Undergraduate Forestry Education, Reid Viegut, David Kulhavy, Daniel Unger, I-Kuai Hung, Brian Humphreys

Faculty Publications

The use of Unmanned Aircraft Systems (UAS) in undergraduate forestry education continues to expand and develop. Accuracy of data collection is an important aspect of preparation for "society-ready" foresters to meet the complex sustainable environment managing for ecological, social and economic interests. Hands-on use of a DJI Phantom 4 Pro UAS by undergraduates to measure the length and area of 30 linear features and areal features on Earth's surface were estimated. These measurements were compared (measured within the ArcMap 10.5.2 interface) to hyperspectral Pictometry imagery measured on the web-based interface and the Google Earth Pro interface. Each remotely estimated measurement …

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Student Led Campus Desire Path Evaluation Using Pictometry® Neighborhood Imagery, David Kulhavy, Daniel Unger, I-Kuai Hung Jan 2018

Student Led Campus Desire Path Evaluation Using Pictometry® Neighborhood Imagery, David Kulhavy, Daniel Unger, I-Kuai Hung

Faculty Publications

A student led evaluation of desire paths (e.g., paths created by pedestrians on an open landscape) across the Stephen F. Austin State University (SFASU) campus was performed within a senior level spatial science course in order to create a method for mitigation of desire paths and for campus beautification. Each desire path on campus was identified with the length of each path measured in the field and categorized by the condition of the path in order to assess and determine a necessary solution for each path identified. In addition, Pictometry® high spatial resolution digital imagery was used to determine …

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Book Review Of Cattle In The Backlands: Mato Grosso And The Evolution Of Ranching In The Brazilian Tropics, By Robert W. Wilcox., Andrew Sluyter Jan 2018

Book Review Of Cattle In The Backlands: Mato Grosso And The Evolution Of Ranching In The Brazilian Tropics, By Robert W. Wilcox., Andrew Sluyter

Faculty Publications

No abstract provided.

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Book Review Of Humboldt's Mexico: In The Footsteps Of The Illustrious German Scientific Traveller, By Myron Echenberg, Andrew Sluyter Jan 2018

Book Review Of Humboldt's Mexico: In The Footsteps Of The Illustrious German Scientific Traveller, By Myron Echenberg, Andrew Sluyter

Faculty Publications

No abstract provided.

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Challenges Of Elephant Conservation: Insights From Oral Histories Of Colonialism And Landscape In Tsavo, Kenya, Peter Ngugi Kamau, Andrew Sluyter Jan 2018

Challenges Of Elephant Conservation: Insights From Oral Histories Of Colonialism And Landscape In Tsavo, Kenya, Peter Ngugi Kamau, Andrew Sluyter

Faculty Publications

No abstract provided.

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Conceived Versus Lived Social Spaces And The Transformation Of The Morro Da Providência Favela Of Rio De Janeiro Since 2008, Jamie Worms, Andrew Sluyter Jan 2018

Conceived Versus Lived Social Spaces And The Transformation Of The Morro Da Providência Favela Of Rio De Janeiro Since 2008, Jamie Worms, Andrew Sluyter

Faculty Publications

No abstract provided.

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Climatic History Of The Northeastern United States During The Past 3000 Years, Jennifer R. Marlon, Neil Pederson, Connor Nolan, Simon Goring, Bryan Shuman, Ann Robertson, Robert Booth, Patrick J. Bartlein, Melissa A. Berke, Michael Clifford, Edward Cook, Ann Dieffenbacher-Krall, Michael C. Dietze, Amy Hessl, J. Bradford Hubeny, Stephen T. Jackson, Jeremiah Marsicek, Jason Mclachlan, Cary J. Mock, David J.P. Moore, Jonathan Nichols, Dorothy Peteet, Kevin Schaefer, Valerie Trouet, Charles Umbanhowar, John W. Williams, Zicheng Yu Oct 2017

Climatic History Of The Northeastern United States During The Past 3000 Years, Jennifer R. Marlon, Neil Pederson, Connor Nolan, Simon Goring, Bryan Shuman, Ann Robertson, Robert Booth, Patrick J. Bartlein, Melissa A. Berke, Michael Clifford, Edward Cook, Ann Dieffenbacher-Krall, Michael C. Dietze, Amy Hessl, J. Bradford Hubeny, Stephen T. Jackson, Jeremiah Marsicek, Jason Mclachlan, Cary J. Mock, David J.P. Moore, Jonathan Nichols, Dorothy Peteet, Kevin Schaefer, Valerie Trouet, Charles Umbanhowar, John W. Williams, Zicheng Yu

Faculty Publications

Many ecosystem processes that influence Earth system feedbacks - vegetation growth, water and nutrient cycling, disturbance regimes - are strongly influenced by multidecadal- to millennial-scale climate variations that cannot be directly observed. Paleoclimate records provide information about these variations, forming the basis of our understanding and modeling of them. Fossil pollen records are abundant in the NE US, but cannot simultaneously provide information about paleoclimate and past vegetation in a modeling context because this leads to circular logic. If pollen data are used to constrain past vegetation changes, then the remaining paleoclimate archives in the northeastern US (NE US) are …

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A Fishnet-Constrained Land Use Mix Index Derived From Remotely Sensed Data, Yanqing Xu, Lei Wang, Cong Fu, Tim Kosmyna Oct 2017

A Fishnet-Constrained Land Use Mix Index Derived From Remotely Sensed Data, Yanqing Xu, Lei Wang, Cong Fu, Tim Kosmyna

Faculty Publications

Research works related to public health, transportation and urban planning have called for indices of land use mix (LUM) to support their spatial models. We propose a fishnet-based LUM calculation algorithm that works with the National Land Cover Database (NLCD) land cover data, a high-level product of Landsat satellite images. Comparing to the traditional LUM calculation, the fishnet structure can work at various spatial scales if aggregating to the administrative boundaries. Test results from regression models showed that our method was able to solve the scale problem identified as modifiable area unit problem that caused an unexpected positive correlation of …

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A Framework For Evaluating Stay Detection Approaches, Cornelia Schneider, Simon Gröchenig, Verena Venek, Michael Leitner, Siegfried Reich Oct 2017

A Framework For Evaluating Stay Detection Approaches, Cornelia Schneider, Simon Gröchenig, Verena Venek, Michael Leitner, Siegfried Reich

Faculty Publications

In recent years, sensors of mobile devices are increasingly used in the research field of Active and Assisted Living (AAL), in particular, for movement analysis. Questions, such as where users typically stay (and for how long), where they have been or where they will most likely be going to, are of utmost importance for implementing smart AAL services. Due to the plethora of application scenarios and varying requirements, the challenge is the identification of an appropriate stay detection approach. Thus, this paper presents a comprehensive framework covering the entire process from data acquisition, pre-processing, parameterization to evaluation so that it …

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