Digital Commons Network^™

Simultaneous Assessment Of Key Properties Of Arid Soil By Combined Pxrf And Vis-Nir Data, D. C. Weindorf, S. Chakraborty, J. Herrero, B. Li, C. Castañeda, A. Choudhury

Faculty Publications

Arid soil is common worldwide and has unique properties that often limit agronomic productivity, specifically, salinity expressed as soluble salts and large amounts of calcium carbonate and gypsum. Currently, the most common methods for evaluating these properties in soil are laboratory-based techniques such as titration, gasometry and electrical conductivity. In this research, we used two proximal sensors (portable X-ray fluorescence (PXRF) and visible near-infrared diffuse reflectance spectroscopy (Vis-NIR DRS)) to scan a diverse set (n=116) of samples from arid soil in Spain. Then, samples were processed by standard laboratory procedures and the two datasets were compared with advanced statistical techniques. …

Modeled And Measured Image-Plane Polychromatic Speckle Contrast, Noah R. Van Zandt, Jack E. Mccrae, Steven T. Fiorino

Faculty Publications

The statistical properties of speckle relevant to short- to medium-range (tactical) active tracking involving polychromatic illumination are investigated. A numerical model is developed to allow rapid simulation of speckled images including the speckle contrast reduction effects of illuminator bandwidth, surface slope, and roughness, and the polarization properties of both the source and the reflection. Regarding surface slope (relative orientation of the surface normal and illumination/observation directions), Huntley’s theory for speckle contrast, which employs geometrical approximations to decrease computation time, is modified to increase accuracy by incorporation of a geometrical correction factor and better treatment of roughness and polarization. The resulting …

Soil Functional Zone Management: A Vehicle For Enhancing Production And Soil Ecosystem Services In Row-Crop Agroecosystems, Alwyn Williams, Daniel A. Kane, Patrick M. Ewing, Lesley W. Atwood, Andrea Jilling, Meng Li, Yi Lou, Adam S. Davis, A. Stuart Grandy, Sheri C. Huerd, Mitchell C. Hunter, Roger T. Koide, David A. Mortensen, Richard G. Smith, Sieglinde S. Snapp, Kurt A. Spokas, Anthony C. Yannarell, Nicholas R. Jordan

Faculty Publications

There is increasing global demand for food, bioenergy feedstocks and a wide variety of bio-based products. In response, agriculture has advanced production, but is increasingly depleting soil regulating and supporting ecosystem services. New production systems have emerged, such as no-tillage, that can enhance soil services but may limit yields. Moving forward, agricultural systems must reduce trade-offs between production and soil services. Soil functional zone management (SFZM) is a novel strategy for developing sustainable production systems that attempts to integrate the benefits of conventional, intensive agriculture, and no-tillage. SFZM creates distinct functional zones within crop row and inter-row spaces. By incorporating …

Continental Carbonate Facies Of A Neoproterozoic Panglaciation, North-East Svalbard, Ian J. Fairchild, Edward J. Fleming, Huiming Bao, Douglas I. Benn, Ian Boomer, Yuri V. Dublyansky, Galen P. Halverson, Michael J. Hambrey, Chris Hendy, Emily A. Mcmillan, Christoph Spötl, Carl T.E. Stevenson, Peter M. Wynn

Faculty Publications

© 2016 International Association of Sedimentologists. The Marinoan panglaciation (cα 650 to 635 Ma) is represented in north-east Svalbard by the 130 to 175 m thick Wilsonbreen Formation which contains syn-glacial carbonates in its upper 100 m. These sediments are now known to have been deposited under a CO2-rich atmosphere, late in the glaciation, and global climate models facilitate testing of proposed analogues. Precipitated carbonates occur in four of the seven facies associations identified: Fluvial Channel (including stromatolitic and intraclastic limestones in ephemeral stream deposits); Dolomitic Floodplain (dolomite-cemented sand and siltstones, and microbial dolomites); Calcareous Lake Margin (intraclastic dolomite and …

Change In Obesity Prevalence Across The United States Is Influenced By Recreational And Healthcare Contexts, Food Environments, And Hispanic Populations, Candice A. Myers, Tim Slack, Corby K. Martin, Stephanie T. Broyles, Steven B. Heymsfield

Faculty Publications

Objective To examine change in county-level adult obesity prevalence between 2004 and 2009 and identify associated community characteristics. Methods Change in county-level adult (≥20 years) obesity prevalence was calculated for a 5-year period (2004-2009). Community measures of economic, healthcare, recreational, food environment, population structure, and education contexts were also calculated. Regression analysis was used to assess community characteristics associated (p< 0.01) with change in adult obesity prevalence. Results Mean±SD change in obesity prevalence was 5.1±2.4%. Obesity prevalence decreased in 1.4% (n = 44) and increased in 98% (n = 3,060) of counties from 2004-2009. Results showed that both baseline levels and increases in physically inactive adults were associated with greater increases in obesity prevalence, while baseline levels of and increases in physician density and grocery store/supercenter density were related to smaller increases in obesity rates. Baseline levels of the Hispanic population share were negatively linked to changing obesity levels, while places with greater Hispanic population growth saw greater increases in obesity. Conclusions Most counties in the U.S. experienced increases in adult obesity prevalence from 2004 to 2009. Findings suggest that community-based interventions targeting adult obesity need to incorporate a range of community factors, such as levels of physical inactivity, access to physicians, availability of food outlets, and ethnic/racial population composition.

Harmony And Disharmony In International Patent Law, Colleen Chien

Faculty Publications

One of the purposes of the Trans‐Pacific Partnership (TPP) is to harmonize standards and create a uniform climate for trade and investment. As lawmakers deliberate the terms of the deal, they must consider what the long‐term impact of agreeing to its sweeping provisions will be. As they do so, they should keep in mind that the gaps between the agreed‐upon principles and local implementation, and the differences between local implementation – some of them by design – are often quite great. Drawing upon the existing literature, this short essay provides a survey of the extent of harmony and disharmony in …

The Constitutional Challenge To Teacher Tenure, Derek W. Black

Faculty Publications

In 2012, education reformers theorized a novel constitutional strategy to eliminate tenure. They argued that tenure leads to the retention of ineffective teachers, and that ineffective teaching deprives students of the constitutional right to education embedded in state constitutions. This theory immediately caught hold, with a California trial court striking down tenure in 2014 and litigation commencing in other states weeks thereafter.

The outcome of this litigation movement will determine both the future of the teaching profession and the scope of the constitutional right to education. To date, however, no high court or scholar has thoroughly analyzed the theory. This …

Continental Carbonate Facies Of A Neoproterozoic Panglaciation, North-East Svalbard, Ian J. Fairchild, Edward J. Fleming, Huiming Bao, Douglas I. Benn, Ian Boomer, Yuri V. Dublyansky, Galen P. Halverson, Michael J. Hambrey, Chris Hendy, Emily A. Mcmillan, Christoph Spötl, Carl T.E. Stevenson, Peter M. Wynn

Faculty Publications

© 2016 International Association of Sedimentologists. The Marinoan panglaciation (cα 650 to 635 Ma) is represented in north-east Svalbard by the 130 to 175 m thick Wilsonbreen Formation which contains syn-glacial carbonates in its upper 100 m. These sediments are now known to have been deposited under a CO2-rich atmosphere, late in the glaciation, and global climate models facilitate testing of proposed analogues. Precipitated carbonates occur in four of the seven facies associations identified: Fluvial Channel (including stromatolitic and intraclastic limestones in ephemeral stream deposits); Dolomitic Floodplain (dolomite-cemented sand and siltstones, and microbial dolomites); Calcareous Lake Margin (intraclastic dolomite and …

Islands Within An Almost Island: History, Myth, And Aislamiento In Baja California, Mexico, Ryan B. Anderson

Faculty Publications

This paper examines the persistent histories and lasting effects of the Baja California peninsula's status as an "almost island." The peninsula is almost an island in so many ways. Its reputation as an island-like entity has also ben strengthened by a longstanding myth that it was, in fact, an actual island. In many senses it was an island - isolated, remote, difficult to envision, understand, and control. Geography and climate played a vital role in all of this, but so, too, did human imagination. The author uses the concept of shima, along with discussions about the dual meanings of the …

Relationships Between Wind Predictions And Model Resolution Over Coastal Regions, Mustafa Kemal Cambazoglu, Cheryl Ann Blain, Travis A. Smith, Robert S. Linzell

Faculty Publications

The impact of resolution on wind predictions within regions of complex coastal geometry is evaluated using a quadruple nest of COAMPS^® (27 km to 1 km) to find an optimal configuration of spatial and temporal resolution. Two regions, Turkish Straits System and Chesapeake Bay, are selected because of their diverse coastal environments, the availability of wind observations and to determine if the relationships between resolution and wind prediction accuracy would be valid for geographically different regions. The coarse resolution model successfully simulates the general trend of the surface wind variation, but cannot capture peak events accurately. Increased spatial resolution …

It Is Time To Talk, Part 2: Why Racial Integration Is So Hard, David K. Penno

Faculty Publications

In this series of articles we are exploring some key areas that need to be addressed in any serious discussion about ethnic separation in the Adventist Church. The previous article reviewed the theological debate that speaks to the issue of organizational segregation in the church. Does the Word of God demand integration at all levels of the organization, or does it allow for some form of segregation? In this article we will describe some of the psychological and sociological realities that lead us to naturally segregate ourselves.

Accuracy Assessment Of Pictometry® Height Measurements Stratified By Cardinal Direction And Image Magnification Factor, Daniel Unger, David Kulhavy, I-Kuai Hung, Yanli Zhang

Faculty Publications

The aim of this project was to ascertain if Pictometry^® estimated height could be used in lieu of field-based height estimation. Height of a light pole measured with a telescopic height pole was compared to Pictometry^® hyperspatial 4-inch (10.2 centimeters) multispectral imagery estimated light pole height on the campus of Stephen F. Austin State University, Nacogdoches, Texas. Average percent agreement between light pole height and Pictometry^® estimated light pole height summarized by Pictometry^® image magnification factors at 100%, 125%, 150%, 200%, and 300% magnification were within 98% of light pole height with percent disagreement ranging from …

Road-Edge Effects On Herpetofauna In A Lowland Amazonian Rainforest, Ross J. Maynard, Nathalie C. Aall, Daniel Saenz, Paul S. Hamilton, Matthew Kwiatkowski

Faculty Publications

The impact of roads on the flora and fauna of Neotropical rainforest is perhaps the single biggest driver of habitat modification and population declines in these ecosystems. We investigated the road-edge effect of a low-use dirt road on amphibian and reptile abundance, diversity, and composition within adjacent lowland Amazonian rainforest at San José de Payamino, Ecuador. The road has been closed to vehicle traffic since its construction in 2010. Thus, effects from vehicle mortality, vehicle-related pollution, and road noise were not confounding factors. Herpetofauna were surveyed using both visual encounter surveys and drift fences with pitfall and funnel traps at …

Do Snap Recipients Get The Best Prices, Raymond March, Conrad Lyford, Carlos Carpio, Tullaya Boonsaeng

Faculty Publications

This paper examines the relationship between SNAP participation and prices paid for food items. To test this relationship, we develop an expensiveness index following the method of Aguiar and Hurst (2007) and use the FoodAPS data set. Using both the ordinary least squares method and controlling for endogeneity using an instrumental variables approach, we found SNAP participation did not hold a statistically significant relationship with the prices paid for food items when we controlled for consumer behavior and food market variables. This suggests that SNAP participants are not systematically disadvantaged in their food purchases. Additional efforts to further educate SNAP …

Cooperative Strategies In International Business And Management: Reflections On The Past 50 Years And Future Directions, Paul W. Beamish, Nathaniel C. Lupton

Faculty Publications

Over the past 50 years, cooperative forms of governance such as equity joint ventures and other strategic alliances have received tremendous attention in international business and management research. This article traces the history of this research over these past five decades with particular emphasis on the critical role that (Columbia) Journal of World Business has played in disseminating scholarly and managerial expertise on the successful management of cross-border, inter-firm collaboration. We highlight the evolution of interest in different contexts, phenomena, theories, and methodologies, along with the factors that have driven interest in these topics. Several suggestions for future research are …

Regional Economic Development―A Survey Of Theories In The Past Two Centuries (1800-2000), Xiaohong Quan

Faculty Publications

The purpose of this paper is to survey the evolution of theories in the field of regional economic development in the past two centuries (1800-2000) before the new millennium. Theories from the ‘spacial’ dimension and from the ‘economic’ dimension are understood as the classical foundation of the field. Important theories are identified and discussed for regional economic development. Specifically, the topics examined here first center around the mechanisms behind regional economic growth, answering questions such as why growth happens in certain regions, why growth can shift to other places, and what factors or environments can foster growth in certain regions. …

Comparing Remotely Sensed Pictometry® Web Based Slope Distance Estimates With In Situ Total Station And Tape Slope Distance Estimates, David Kulhavy, Daniel Unger, Yanli Zhang, Phillip Bedford, I-Kuai Hung

Faculty Publications

Slope distance was measured between the top of 30 light poles and their respective ground level coordinate identified within a central parking lot on the campus of Stephen F. Austin State University, Nacogdoches, Texas. Slope distance measured using Pictometry^® hyperspatial 4-inch (10.2 centimeters) multispectral imagery within a web based interface was compared to in situ total station and tape measured slope distance. The range for mean slope distance for Pictometry^®, total station, and tape measured slope distance was 0.05 meters. Mean slope distance was 15.36 meters, 15.37 meters, and 15.41 meters for Pictometry^®, total station, …

Integrating Faculty Led Service Learning Training To Quantify Height Of Natural Resources From A Spatial Science Perspective, Daniel Unger, David Kulhavy, Kai Busch-Peterson, I-Kuai Hung

Faculty Publications

Arthur Temple College of Forestry and Agriculture (ATCOFA) faculty members were trained how to integrate service learning activities within senior level classes at Stephen F. Austin State University (SFASU) in Nacogdoches, Texas. The service learning training, taught under the acronym Mentored Undergraduate Scholarship (MUGS), involved meeting with fellow faculty members over the course of an academic year during the fall semester to first learn how to incorporate service learning activities in a senior level class followed by its incorporation into a class the following spring semester. The service learning model was applied to students in GIS 420, a senior level …

Incorporating Applied Undergraduate Research In Senior To Graduate Level Remote Sensing Courses, Richard Henley, Daniel Unger, David Kulhavy, I-Kuai Hung

Faculty Publications

An Arthur Temple College of Forestry and Agriculture (ATCOFA) senior spatial science undergraduate student engaged in a multi-course undergraduate research project to expand his expertise in remote sensing and assess the applied instruction methodology employed within ATCOFA. The project consisted of performing a change detection land-use/land-cover classification for Nacogdoches and Angelina counties in Texas using satellite imagery. The dates for the imagery were spaced approximately ten years apart and consisted of four different acquisitions between 1984 and 2013. The classification procedure followed and expanded upon a series of concrete theoretical remote sensing principles, transforming the four remotely sensed raster images …

Singular Spaces: The Power And The Passion Of Spanish Art Environments, Jo Farb Hernandez

Faculty Publications

The art environments of Spain – like those the world over – display an astounding conceptual creativity and a vernacular, seat-of-the-pants approach to construction that makes use of locally available found, natural, and recycled objects as well as fabricated components built from scratch. Each result is unique, revealing each creator-builder’s interests, challenges, and concerns as they have developed over the course of a lifetime; as such, it is easy to understand why art environments are so complex. And because we are able to physically enter into and explore the constructions as visitors, we complete the artworks in the same way …

Islands In The Oil: Quantifying Salt Marsh Shoreline Erosion After The Deepwater Horizon Oiling, R. Eugene Turner, G Mcclenachan, A W. Tweel

Faculty Publications

Qualitative inferences and sparse bay-wide measurements suggest that shoreline erosion increased after the 2010 BP Deepwater Horizon (DWH) disaster, but quantifying the impacts has been elusive at the landscape scale. We quantified the shoreline erosion of 46 islands for before and after the DWH oil spill to determine how much shoreline was lost, if the losses were temporary, and if recovery/restoration occurred. The erosion rates at the oiled islands increased to 275% in the first six months after the oiling, were 200% of that of the unoiled islands for the first 2.5 years after the oiling, and twelve times the …

Preface: Remote Sensing Of Water Resources, D.R. Mishra, E.J. D'Sa, S. Mishra

Faculty Publications

No abstract provided.

For Love Or Money? The Economic Consequences Of Delayed Marriage, Jason S. Carroll

Faculty Publications

It has been well documented that over the last few decades we have seen a substantial increase in the median age of marriage in the United States. In fact, we are currently at all-time historic highs in these trends. According to the Current Population Survey from the U.S. Census, the median age of marriage right now is nearly 29 years of age for men and 27 years of age for women. Given the trajectory of this trend over the last several years, we are quickly approaching a time in our culture where half of marriages will occur for individuals after …

Finding Customary International Law, Ryan M. Scoville

Faculty Publications

Established doctrine holds that customary international law (“CIL”) arises from general and consistent state practice that is backed by a sense of legal obligation. Contemporary litigation requires federal courts to apply this doctrine to identify the contours of CIL in a diverse collection of cases ranging from civil actions under the Alien Tort Statute to criminal prosecutions under the Maritime Drug Law Enforcement Act. This Article provides an in-depth look at how federal judges carry out this task. Conducting a citation analysis of opinions published since the U.S. Supreme Court’s 2004 decision in Sosa v. Alvarez-Machain, this Article analyzes …

How Cosmopolitan Are International Law Professors?, Ryan M. Scoville, Milan Markovic

Faculty Publications

This Article offers an empirical answer to a question of interest among scholars of comparative international law: why do American views about international law appear at times to differ from those of other countries? The authors contend that part of the answer lies in legal education. Conducting a survey of the educational and professional backgrounds of nearly 150 legal academics, the authors reveal evidence that professors of international law in the United States often lack significant foreign legal experience, particularly outside of the West. Sociological research suggests that this tendency leads professors to teach international law from predominantly nationalistic and …

Land Shark At The Door? Why And How States Should Regulate Landmen, Ann M. Eisenberg

Faculty Publications

No abstract provided.

Taking Teacher Quality Seriously, Derek W. Black

Faculty Publications

Although access to quality teachers is one of the most important aspects of a quality education, explicit concern with teacher quality has been conspicuously absent from past litigation over the right to education. Instead, past litigation has focused almost exclusively on funding. Though that litigation has narrowed gross fundinggaps between schools in many states, it has not changed what matters most: access to quality teachers.

This Article proposes a break from the traditional approach to litigating the constitutional right to education. Rather than constitutionalizing adequate or equal funding, courts should constitutionalize quality teaching. The recent success of the constitutional challenge …

Branding Taxation, Jeffrey A. Maine, Xuan-Thao Nguyen

Faculty Publications

Branding is important not only to businesses,but also to the economy. The intellectual property laws and tax laws should thus further the legitimate goals of encouraging and protecting brand investments while maintaining a sound tax base. Intellectual property protections for branding depend on advertisement and enforcement, both of which demand significant amounts of private investment by firms. Although one would expect similar tax treatments of both categories of investment, the categories are actually treated as vastly different for federal income tax purposes. Additionally, tax distinctions also exist within each category. The result is that some branding investments are expensed and …

African Fire Cultures, Cattle Ranching, And Colonial Landscape Transformations In The Neo-Tropics, Andrew Sluyter, Chris S. Duvall

Faculty Publications

No abstract provided.

Guide For “Los Isleños” Field Trip, Conference Of Latin Americanist Geographers, New Orleans, 2017, Andrew Sluyter

Faculty Publications

No abstract provided.