Digital Commons Network^™

Validating Uas-Based Ndvi Data With Satellite Landsat Imagery For Bald Eagle Habitat Prediction In The Del Rio Springs Ecosystem, Noah Morales, Colton Weeks, Hank Vincent, Ronny Schroeder

Student Works

Vegetation health is commonly assessed using the Normalized Difference Vegetation Index (NDVI), which can be derived from multispectral sensors operating at different spatial resolutions. Validating NDVI products across sensor platforms is essential to determine their reliability for environmental monitoring and habitat assessment. This research compares NDVI derived from moderate-resolution satellite imagery and high-resolution unmanned aircraft system (UAS) imagery collected over the same study area. Landsat imagery, provided through the joint USGS–NASA mission, was used to represent satellite-based vegetation patterns, while high-resolution multispectral data were acquired using a MicaSense sensor mounted on a UAS to capture fine-scale vegetation detail.

NDVI values …

Validating Uas Lidar With Airborne Lidar For Precision Streamline Generation In Del Rio Springs, Arizona, Brad Rudy, Colton Weeks, Hank Vincent, Ronny Schroeder

Student Works

Accurate streamline delineation and high-resolution topographic products are essential across numerous disciplines, including hydrological analysis, environmental monitoring, construction, and erosion modeling. Products derived from high-accuracy elevation data provide greater reliability and improved decision-making outcomes for all fields that depend on them. A 2018 USGS airborne LiDAR dataset covering the Del Rio Springs riparian area north of Chino Valley, Arizona, offers a valuable opportunity to evaluate the relative accuracy of the DJI L1 LiDAR sensor when mounted on a Matrice 300 RTK UAV platform. Compared to traditional manned airborne systems, the UAV-mounted L1 provides high-accuracy, high-density point cloud data over small …

Integrated Geospatial Analysis Of Burn Severity And Vegetation Recovery Of The California August Complex Fire In 2020, Dharm Barot, Ronny Schroeder

Student Works

Large wildfires increasingly alter vegetation structure and ecosystem recovery trajectories at landscape scales, requiring reliable geospatial methods for post-fire assessment. This study evaluates burn severity and vegetation recovery following the 2020 California August Complex Fire using an integrated framework combining multispectral satellite imagery, spatial statistics, and airborne LiDAR data.

Burn severity was quantified using differenced Normalized Burn Ratio (dNBR), and vegetation recovery was assessed through a multi-temporal NBR time series spanning pre-fire (2015), fire-year (2020), and post-fire (2025) conditions. Optimized Hotspot Analysis (Gi*) was applied to isolate statistically significant clusters of high burn severity and reduce bias in recovery estimates. …

Integrated Geospatial Analysis Of Burn Severity And Vegetation Recovery Of The California August Complex Fire In 2020, Dharm Barot, Ronny Schroeder, Elise Anderson

Student Works

Large wildfires increasingly alter vegetation structure and ecosystem recovery trajectories at landscape scales, requiring reliable geospatial methods for post-fire assessment. This study evaluates burn severity and vegetation recovery following the 2020 California August Complex Fire using an integrated framework combining multispectral satellite imagery, spatial statistics, and airborne LiDAR data.

Burn severity was quantified using differenced Normalized Burn Ratio (dNBR), and vegetation recovery was assessed through a multi-temporal NBR time series spanning pre-fire (2015), fire-year (2020), and post-fire (2025) conditions. Optimized Hotspot Analysis (Gi*) was applied to isolate statistically significant clusters of high burn severity and reduce bias in recovery estimates. …

Geo210 Intro To Gis: Students As Partners Support Of Instructional Modalities, Elise Anderson, Dharm Barot, Riley Grant

Student Works

This study investigates the impact of a Students as Partners (SAP) model on teaching effectiveness and student success in GEO210: Introduction to Geographic Information Systems at Embry‑Riddle Aeronautical University. Over three semesters, student partners collaborated with the instructor to co‑design course curriculum and instructional modalities. This collaboration resulted in peer‑led lectures, collaborative learning activities, iterative skill assessments, and revised assignments with clear rubrics. Student outcomes in SAP sections were compared with those in non‑SAP sections using course evaluations, grades, and qualitative student feedback. The results indicate that SAP sections achieved higher teaching effectiveness ratings, more positive perceptions of the learning …

Geospatial Analysis Of Wildfire Ignitions And Proximity To Electric Transmission Lines In Arizona’S National Forests, Shane Ishmael, Ronny Schroeder

Student Works

The number of wildfires in Arizona rose by 18% from 2023 to 2024. Wildfires hit the Western United States hard, especially in states like Arizona and California, where vast national forests often fall victim to the biggest blazes. According to the Western Fire Chiefs Association, 19% of wildfires from 2016 to 2020 were sparked by electrical transmission lines.

This study explores whether wildfire start-location hotspots line up with power transmission routes running through Arizona’s Coconino and Tonto National Forests. The main hypothesis is that areas near power lines are more likely to become wildfire hotspots than other regions.

We used …

Precision Rockslide Hazard Mapping With Multispectral Imaging And Lidar Along Arizona Highway 89a, Hank Warner, Ronny Schroeder

Student Works

Along mountainous roads, rockslides, mud slides and avalanches pose a significant risk for continued access to a region and can cause large amounts of damage to infrastructure, taking time to clear and repair. The prediction of where these events will occur can allow preventative measures to be taken, allowing sustained access and preventing costly repairs.

This study develops a method to analyze and predict rockslide risk using satellite-sourced multispectral imagery and airborne LiDAR data.

The developed method started with multispectral LANDSAT 8 imagery and airborne LiDAR captures over Arizona Highway 89A, with all data taken between late August and early …

Wuthuga (Dugong) Population Status In Gathaagudu (Shark Bay) Sea Country, Holly Raudino, Amanda Hodgson, Chris Cleguer, Kym Reeve, Molly Moustaka, Osmar Luiz, Simone Strydom, Kathy Murray, Neilisha Oakley, Tariq Mcdonald, Abby Leyendekkers, Jay Hayes, Marlee Hutton, Julian A. Tyne, Kelly Waples

Research outputs 2022 to 2026

Introduction: Monitoring trends in wildlife populations and their response to pressures is integral but challenging for conservation managers. Wuthuga (dugongs (Dugong dugon)) are increasingly vulnerable as extreme climatic events, such as marine heatwaves and flooding, intensify with a warming climate and increasingly impact the seagrass they are dependent upon.

Methods: This study estimated wuthuga abundance using two methodologies: conventional observer aerial surveys, as part of a time-series of surveys, alongside aerial imagery, in Gathaagudu (Shark Bay), Western Australia in 2023. We compare the contemporary abundance estimates with long term monitoring data (1989 – 2018) to identify temporal trends in abundance …

Iberoamerican Neomedievalisms: “The Middle Ages” And Its Uses In Latin America, Edited By Nadia R. Altschul And Maria Ruhlmann, Emily Francomano

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

A Convert’S Tale: Art, Crime, And Jewish Apostasy In Renaissance Italy, By Tamar Herzig, Lyn Blanchfield

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

The Hungry City: A Year In The Life Of Medieval Barcelona, By Marie A. Kelleher, Jessica Minieri

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

The Permeable Self: Five Medieval Relationships, By Barbara Newman, Laura Moncion

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Chaucer And Becket’S Mother: “The Man Of Law’S Tale,” Conversion, And Race In The Middle Ages, By Meriem Pagès, Daisy E. Black

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Eleanor Of Aquitaine, As It Was Said: Truth And Tales About The Medieval Queen, By Karen Sullivan, Lauren Wood

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Introduction: Intersections Of Gender And Genres In Medieval Judaism, Christianity, And Islam, Linda G. Jones

Medieval Feminist Forum: A Journal of Gender and Sexuality

The introductory essay describes the aims of this special volume, which are to analyze the intersections between religion and gender in Jewish, Christian, and Islamic cultures, as reflected in diverse pre- and early modern textual genres, and to explore the relationships between gender and genres. Toward these ends the authors interrogate how a given textual genre, as well as the gender of the author/compiler and the intended audience, might influence the representations of gender. The introductory essay summarizes the seven articles constituting the volume, highlights the points of contact and differences among them, and reflects upon their broader significance to …

“Be Only A Man": Authority, Dependency, And Masculinity In Geniza Letters Of Mothers To Their Sons, Oded Zinger

Medieval Feminist Forum: A Journal of Gender and Sexuality

One of the most exciting discoveries among the Cairo Geniza, a rich trove of ancient manuscripts discovered in the Ben Ezra Synagogue at Fustat (Old Cairo), is women’s letters. Up until the early modern period, we have no text written by a Jewish woman preserved in traditional channels of transmission—that is, manuscripts copied by scribes and preserved in libraries or personal collections. Yet the Geniza documents preserve over two hundred letters written by women in different languages and spanning several centuries. Twenty-nine of these letters are from mothers to sons. Letters from mothers to sons have some distinctive characteristics when …

The Masculinization Of Grief In Arabic Adab Literature: Ibn ‘Abd Al-Rabbih’S Al-‘Iqd Al-Farīd, Linda G. Jones

Medieval Feminist Forum: A Journal of Gender and Sexuality

This article explores the relationship between masculinity and literary expressions of grief in premodern Islamic cultures based on “The Book on Women Mourners, Condolences, and Elegies,” from the adab anthology, al- ‘Iqd al-farīd (The Unique Necklace), compiled by the Cordovan belletrist Ibn ‘Abd Rabbih (d. 940). While Ibn ‘Abd Rabbih’s selection of literary specimens by female authors has been studied in depth, the far more numerous examples of male-authored bereavement literature have not been analyzed in detail. Hence this article has two aims. First, it will examine the relatively neglected genres of Arab-Islamic bereavement literature featuring grieving …

Gender And Genres In The Ādāb-I Menāzil, Özgen Felek

Medieval Feminist Forum: A Journal of Gender and Sexuality

Gender and gender roles routinely appear across different genres of Islamic literature. Since each genre’s handling of the subject of gender is evaluated within the borders of that genre, studies in the field have been based on specific texts or genres. The Ādāb-ı menāzil (“Manners of the Household”), written by ʿAbdü’l-Laṭīf ibn-i Ṭurmış Ḳaramānī (d. 1516), is a unique Ottoman Turkish text that brings together the perspectives of different genres. It is a book of morals, advice, and religious knowledge written for women, as Ḳaramānī explicitly declares in the preface. The work includes Qur’anic verses, hadiths, stories, and legends …

Gender And Historiography In The Construction Of The Image Of King John And Queen Violant Of Aragon, Oriol Catalán

Medieval Feminist Forum: A Journal of Gender and Sexuality

The reign of John I of Aragon (r. 1387–1396) and his second wife Violant de Bar has been often denigrated by Catalan historiography with political arguments but also because of ensuing gender debates associating the shortcomings of his reign with his supposed manly weakness. This article deconstructs both political and gendered representations of the Aragonese monarchs by distinguishing what is reasonably attributable to them from accusations motivated by the conflicts of the time and later contexts. Drawing upon the concepts of “hegemonic masculinity” and “multiple masculinities,” the article compares the gender representations of King John I and Queen Violant in …

“Softer Than A Woman?" Gendered Images In Odo Of Cheriton’S Anti-Judaic Sermon, Jussi Hanska, Sari Katajala-Peltomaa

Medieval Feminist Forum: A Journal of Gender and Sexuality

This article analyzes the intersection of the anti-Judaic and gendered motifs presented in English theologian and preacher Odo of Cheriton’s (d. 1246–1247) sermon for the tenth Sunday after the Holy Trinity. The sermon features an exemplum that is a distorted reinterpretation of a story originally found in Jewish historian Flavius Josephus’s Bellum iudaicum, which describes the siege and fall of Jerusalem in 70 CE. In one memorable passage Josephus tells how a Jewish woman named Mary loses her mind because of the hardships of the siege and hunger, kills and roasts her baby boy, and eats it. Yet Odo …

Medieval Feminist Forum: A Journal Of Gender And Sexuality 61.2 (2026)

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Conversion And The Reconfiguration Of Religious Gender Roles: Conversas And Moriscas In Late Medieval Iberia, Ivana Arsić

Medieval Feminist Forum: A Journal of Gender and Sexuality

This study addresses the impact of the cultural homogenization policy in late medieval Castilian and Aragonese societies by analyzing Spanish Inquisition documents through a gendered lens. Specifically, this article illustrates how these records depict the religious experiences of Conversas and Moriscas (Christian women of Jewish and Muslim origin, respectively). Whereas recent investigations within cultural studies have engaged in descriptive analysis of female conversion, this article will provide a causal explanation through a comparative gendered perspective, arguing that women’s heightened involvement in religion was particular to the context of forced conversion. Toward this end, I first examine how Jewish and Muslim …

Christine De Pizan: Empowering Women In Text And Image, By Charlotte Cooper-Davis, Kelsey Boor

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

“The Lover’S Confession”: A Translation Of John Gower’S “Confessio Amantis,” Edited And Translated By Brian Gastle And Catherine Carter With Latin Translations By Andrew Galloway, Lynn Arner

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

The Other Faces Of Arthur: Chivalric Whiteness In The Global North Atlantic, By Nahir I. OtañO Gracia, Coral Lumbley

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Mary’S Granddaughters: Marian Conversion, Gender, And The Reproduction Of Religious Belief In Medieval And Early Modern Castile, Amanda Valdés Sánchez

Medieval Feminist Forum: A Journal of Gender and Sexuality

This article explores how the conversion of Muslim women was perceived as being spurred by Mary’s love, as evidenced in Castilian Marian miracle collections, popular literature, church iconography, and missional policy. I argue that, in the context of the Castilian colonization of Muslim Iberia, Muslim women’s conversion was stimulated and imagined differently from their male counterparts. Through the analysis of post-thirteenth-century Castilian Marian miracle tales and devotional iconography, my research interrogates the role of Marian devotion in the construction of a model of religious conversion that specifically sought to convert women and children and identified Muslim women as the means …

Berengaria Of Navarre: Queen Of England, Lord Of Le Mans, By Gabrielle Storey, Michael Evans

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Gender And Medieval Mysticism From India To Europe, Edited By Alexandra Verini And Abir Bazaz, Boyda Johnstone

Medieval Feminist Forum: A Journal of Gender and Sexuality

No abstract provided.

Plasma Aβ42/40 Predicts Progression From Aβ-Amyloid Negative To Positive Pet Scans, Azadeh Feizpour, Vincent Doré, Pierrick Bourgeat, James D. Doecke, Rodrigo Canovas, Simon M. Laws, Tenielle Porter, Kun Huang, Christopher Fowler, Ralph N. Martins, Paul Maruff, Hamid R. Sohrabi, Michael W. Weiner, John C. Morris, Tammie L.S. Benzinger, Suzanne E. Schindler, Randall J. Bateman, Yan Li, Ovod Vitaliy, Larry Ward, Jurgen Mejan-Fripp, Colin L. Masters, Victor L. Villemagne, Christopher C. Rowe

Research outputs 2022 to 2026

Background The agreement between plasma Aβ42/40 and Aβ positron emission tomography (PET) is approximately 75 %, with ∼85 % of discrepancies due to positive plasma but negative PET results. It is unclear whether this reflects Aβ changes in plasma before PET-detectable. Objectives To assess the influence of Aβ42/40 positivity on risk of progression to Aβ PET positivity, and feasibility of using plasma Aβ42/40 tests to enrich a primary prevention trial. Design A prospective longitudinal cohort study. Setting Participants of Australian Imaging, Biomarkers and Lifestyle study (AIBL), Alzheimer’s Disease Neuroimaging Initiative (ADNI), and Open Access Series of Imaging Studies 3 (OASIS3). …

The Strategic Competence Of Secondary Mathematics Teachers Solving Algebraic Word Problems, Vesife Hatisaru, Steven Richardson, Helen Chick, John Sevier

Research outputs 2022 to 2026

We examined the strategic competence of 22 secondary mathematics teachers by considering their solutions to an algebraic word problem involving simultaneous equations. The analyses have shown that although the majority could solve the problem, the strategic competence of the participants varied, with some teachers having greater fluency with an algebraic solution, and the others less likely to address simultaneity. Overall, many of the teachers had relatively limited capacity to identify additional solution approaches. The study highlights the usefulness of a strategic competence scheme with key indicators that may reveal areas for further teacher development, with the specific findings suggesting the …