Digital Commons Network^™

Rate Of Decomposition And Release Of Nutrients From Litter In A Heteropogon Contortus-Bothriochloa Bladhii Dominant Native Pasture, Deryk G. Cooksley, J H. Prinsen, C J. Paton, A T. Lisle

IGC Proceedings (1977-2023)

Litter dry matter (DM) decomposition and nutrient (N, P, K and S) release were measured for 8, 6-monthly periods in south-eastern Queensland. Litter collected from native paslure growing on a range of soil types was hammer milled, and buried in nylon bags at the collection site, Moisture and (tn a lesser extent) temperature had a greater effect on DM disappearance from nalive pasture litter than its chemical composition or the soil type. A simple index of litter disappearance was derived from average air temperature and surface (0-10 cm) soil water. Based on long-term rainfall and temperature data, 24.8% of litter …

Nitrogen Use Efficiency By Chloris Gayana During The Cold Season On The Island Of La Reunion, Gilles Mandret, A Ourry, P F. Chaballier, J Salette

IGC Proceedings (1977-2023)

Cattle breeding improvement at the island of la Reunion (Indian Ocean) had to face 2 major problems: increase the production of heifers and improve forage production. Deficit of forage production will require intensification of farming practices and more particularly higher nitrogen inputs in grassland. Moreover, the great pedoclimatic diversity associated with altitude variability implies use of both temperate and tropical species with or without irrigation. Since 1990 experiments have been undertaken with 1SNH4 15NO3 -fertilised Chloris, gayana, Pennisteum clandestinum, and Lolium hybridum during wet and dry seasons. The C, gayana stand was irrigated when necessary and porous ceramic cups …

Soil Factors And Grassland Type Relationships In The Subhumid Zone Of Northern Benin, Brice Sinsin

IGC Proceedings (1977-2023)

Soil samples collected under different grassland vegetations were studied. Mineral components were closely related to organic matter (OM) level, which was significantly correlated with cation exchange capacity (CBC). OM had an estimated average CEC of 1.8 me./100 g soil. Total exchangeable bases depended on both organic and mineral components and pH. Exchangeable K and Na depended mostly on clay and silt fractions, Cluster and principal component analysis enabled recognition of 5 clusters each grouping different grassland vegetation types. This confirms that soil factor analysis supports the field descriptions of the study soils but is inadequate to discriminate floristic composition at …

Efficient Nitrogen Fertilizer Strategies For Tropical Beef And Dairy Production Using Summer Rainfall And Soil Analysis, M A. Gilbert, N M. Clarkson

IGC Proceedings (1977-2023)

Nitrogen (N) deficiency is a major limitation to growth of pastures in tropical and subtropical regions. In the tropics and subtropics of north-eastern Australia, grass yield is curvilinearly related (R2=0.75) to summer rainfall and the rate of N fertiliser. Data from a range of grazing experiments also indicate that beef and dairy production (kg/ ha) are related to N fertiliser rate in a curvilinear manner; production is near optimum at N rates of 250-300 kg N/ha/year, when summer rainfall is >1000 mm. Given the importance of summer rainfall and N fertiliser, climatic analysis can enhance the usefulness of N fertiliser …

Effects Of Tillage On Soil Nitrogen And Growth Of Three Rhodes Grass (Chloris Gayana Kunth) Cultivars On A Typical Haplustol, M F. Barbero, C B. Loza, P C. Faustinelli

IGC Proceedings (1977-2023)

In the northern part of the province of Cordoba (32°S), Argentina pasture production is limited by nitrogen availability. The work, using Rhodes ( Chloris gaya11a Ku nth) of 3 origins, evaluated the effect of various dates of surface tillage on the dry matter production and nitrogen content of 3 Rhodes grass cultivars: a local ecotype (Cordobes), cv. Samford and cv. Katambora. Dry matter and nitrogen production was increased in the 3 cultivars when the tillage was done before the rainy season.

Soil Quality And Its Management In Humid Subtropical And Tropical Environments, R Lal, F P. Miller

IGC Proceedings (1977-2023)

The subtropical and tropical ecoregions of the world cover an extensive area of about 4900 million ha, and are characterised by deeply weathered soils derived from geologically old materials, In humid regions, the combination of high temperature and moisture has enhanced the rate and depth of weathering, accelerated leaching and led to the formation of acidic soils with low activity clays. The seasonally dry tropics extend over about 2475 million ha, characterised by savanna vegetation including a mixture of trees and grasses, In comparison with humid ecoregions, the grazing potential is high for soils and climate of the seasonally dry …

Origin And Regulation Of Nutrient Supply To Plants In Humid Tropical Grasslands, Patrick Lavelle, Michael J. Swift

IGC Proceedings (1977-2023)

Stocks and fluxes of carbon and nutrients ln tropical grasslands are determined by a suite of hierarchically organised factors.· Rain foll patterns and edaphic factors first determine the nature of the vegetation, the quantity and quality of organic inputs, and the relative allocation to the production of shoots or roots. Grazing by cattle or native herbivores, and fires, are other processes that significantly affect nutcient cycling. The nature and intensity of constraints exerted by these factors separate different types of tropical grasslands, i.e., savannas induced by the seasonality and limited abundance of rainfall, savannas induced by the poverty of soils …

Viability Of Grass-White Clover Swards For Dairying Production In The Uk, J A. Bax, G.E J. Fisher

IGC Proceedings (1977-2023)

The potential of extensification to reduce production within the BC has increased interest in the use of white clover (Trifolium repens) for milk production. In a long-term system study to determine the potential of white clover, 2 herds of 70 cows were managed on either grass swards plus 350 kg N/ha/annum or on grass-white clover swards which received no inorganic N. Continuous grazing and up to 3 conservation cuts a year had no adverse effects upon clover contents in the mixed swards. Total silage OM yields/ha from the grass-white clover swards were 0,82, 0.81 and 0.96 of those …

Teaching Literacy: The Intersection Of Social Studies And Language Arts Through Integration, Christopher D. Moore, Jennifer Shiers, Pamela Mccabe, Jeremy Nix

Teaching Social Studies in the Peach State

Social studies education has always been an important component of K-5 education; however, as dedicated, content-specific instructional time has steadily decreased over the past two decades to give more time to mathematics and specifically English Language Arts, literacy scores have also decreased. Partnering ELA and social studies in the K-5 space allows for students to build their background knowledge in social studies, while increasing their literacy by using instructional resources connected to social studies during the ELA block, and then teaching social studies thinking skills during devoted social studies class time.

Revealing The Stories Of A Place: Designing Curricula On An Island, Ariel Cornett, Delandrea Hall, Kathryn L. Haughney, Cynthia C. Massey, Amanda Wall, Kania Greer

Teaching Social Studies in the Peach State

Ossabaw Island is a Georgia barrier island, accessible solely by boat and protected from development through a public-private partnership between a foundation and the state. This site has the potential to serve as a primary resource for inspiration, education, and lifelong learning. Our study illuminates how one pre-service teacher (PST) and six teacher educators (TEs) experienced an immersive site visit to this local learning environment. We highlight the importance of experiencing places first-hand and using sources (e.g., oral histories) to make content connections. Additionally, the immersive site visit experience allowed us to collaboratively brainstorm place-based curricular units.

Inclusion Of American Sign Language In Science And Engineering, Alejandro Mejia-Tejada

Society for American Sign Language Journal

For the general public, deaf people are typically known for their signing skills and living as signers, not speakers. However, there is more to this picture. Specifically, one area of consideration and investigation relates to how American Sign Language (ASL) is used as a language in the domains of science and engineering. The other area of investigation relates to how deaf people contribute to the STEM (science, technology, engineering, and math) fields. It will be demonstrated that deaf community members are making inroads into STEM through working as scientists and engineers, including one deaf person known for participating in training …

Special Issue On What To Learn From Undergraduate Research In Asl/Deaf Studies, Jody Cripps

Society for American Sign Language Journal

No abstract provided.

Utilization Of Phytoplankton Distribution And Water Quality Criteria For The Environmental Assessment: A Case Study On Lake Manzala, Egypt, Mahmoud A. Abdelmoneim, Abdel Aziz M. Radwan, Tamer A. El-Betar

Blue Economy

Aim

Lake Manzala is a dynamic ecosystem, receiving enormous pollutants and wastewater that pose serious environmental threats and risks. Using integrated methods for environmental assessment in Lake Manzala, as an applied model, is what the current study aspires to achieve.

Methods

Sampling was carried out via 8 stations, covering the entire Lake during November 2022. Phytoplankton distribution and water quality index (WQI) were investigated.

Results and conclusions

A total of 60 phytoplankton taxa, belonging to five classes were obtained. Bacillariophyceae was the most productive (27 sp.) and predominated by Nitzschia. Cyanophyceae. Chlorophyceae, Dinophyceae and Euglenophyceae were detected and represented by …

The Fierce Green Fire: Vol. 15 Issue 2, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

Ai Is The Future Of Poetry: Embracing Innovation Or Threatening Humanity?, Jesus Corcho '28

Best First-Year Seminar Writing

Poetry has been shaped by many intellectual and technological innovations. Renaissance poets would have found mesmerizing the use of mathematics that the Oulipo movement applied to poetry, which wanted to use mathematical constraints to produce poetry verses. Similarly, those members of the Oulipo movement or even just the followers, would find hypnotic how GenAI is now being applied to poetry and writing. GenAI, or AI, has been crippling into poetry, as something that does not know how to coexist with it. Now the community is presented with this new technological force as both an opportunity and a challenge: poets and …

Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Residential Metals Abatement Program (Rmap) Revised Yard Submittals Round 2 (Dated August 30, 2024), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Hydrodynamic Exposure – On The Quest To Deriving Quantitative Metrics For Mariculture Sites, Oliver Lojek, Nils Goseberg, Heidi Moe Føre, Tobias Dewhurst, Thea Bölker, Kevin Gerald Heasman, Bela H. Buck, David W. Fredriksson, Samuel Rickerich

Faculty Publications

This work attempts to define metrics for hydrodynamic exposure, using known oceanographic variables to provide a universal site assessment method for mariculture structures. Understanding environmental conditions driving open-ocean mariculture siting is crucial in establishing consistent ocean governance, minimizing adverse environmental impacts, and facilitating economically sustainable farm operations. To provide a metric of oceanic conditions and associated requirements for structural design and operation of aquaculture systems, six Exposure Indices (EI) are proposed that consider physical energy levels related to hydrodynamic forces at a site. Four of the proposed indices consider only environmental conditions, while the other two also consider the dimensions …

Air-Stable Palladium N-Heterocyclic Carbene Based Ccc-Nhc Pincer Complexes: Synthesis, Characterization, Photophysical And Raman Vibrational Studies, And Dft Studies, Plus Observation Of An Abnormal Carbene Pincer, Jason A. Denny, Georgette M. Lang, Shane Autry, Vivek Dixit, Tyler L. Woodby, Annie Mcclellan, Jaclyn M. Trate, Nathan I. Hammer, Charles Edwin Webster, Thedford K. Hollis

CAS Publications

A series of CCC-NHC pincer Pd(II)X complexes, where X = Cl, Br, or I, were synthesized by a metalation/transmetalation reaction sequence and characterized by NMR and Raman spectroscopy, photophysical studies, X-ray crystallography, and DFT computational studies. This is the first detailed report of the CCC-NHC pincer Pd complexes analogous the previously reported Pt analogs. Photophysical measurements show that by varying the X ligand, the emission wavelength can be tuned. The chloride complex is a water and air stable blue emitter with a quantum yield of 46% and all three complexes have photostabilities >90%. A combined DFT and TD-DFT study has …

Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Request For Change (Rfc-Rmap-2024-002) For The Soil Remedial Action At Mandan Park (Dated September 19, 2024), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Utilizing Your Life Path To Shape Your Research Career, Julius Green Dr.

Upstate New York Science Librarians Conference

In this talk, Dr. Green will share how his unique life experiences, career trajectory, and personal journey of overcoming challenges shaped his research career. He will explore how these adversities informed his work with undergraduate students, guiding them not only academically but also personally. By embracing his life path, Dr. Green developed a research program that prioritizes resilience, safety, innovation, and inclusivity. Attendees will gain insight into how navigating life’s obstacles can be a powerful tool for shaping one’s academic and professional journey.

Cognitive Landscapes: Argument Evaluations, Misinformation Corrections, And Racial Attitudes In Modern Media, Dominique Lockett

Arts & Sciences Graduate Student Theses and Dissertations

This dissertation explores three critical aspects of communication that significantly impact how individuals process information and form opinions in today's polarized media landscape. While the experiments in each chapter do not directly interact, they collectively illuminate the complex interplay of cognitive biases, misperceptions, and counter-normative speech in shaping public discourse. The first chapter examines argument congruency bias, demonstrating how individuals evaluate arguments based on their alignment with pre-existing beliefs while still distinguishing between strong and weak reasoning. It also investigates the potential of objectivity priming to mitigate these biases, yielding insights into the challenges of overcoming ingrained cognitive patterns. The …

A Novel Approach To Predicting Particle Deposition In A Human Lung Using A Lumped, Oscillatory Respiratory Model, Jordana E. O'Brien

Theses

Inhalation has become widely accepted as the optimal drug delivery mechanism for respiratory diseases, which often requires targeting a particular region of the lung. Mathematical models are key to under- standing the factors that influence drug transport and deposition in the lung. This study proposes a simple zero-dimensional typical path model that couples oscillatory breathing mechanics and particle deposition over multiple breathing cycles. Lung regions are lumped into compartments, and respiration is modeled using a circuit analog framework to capture airflows, lung pressures, and volumes in each lumped region. Particle transport and deposition are modeled by a mass-balance equation in …

Intergenerational Programs With Older Adults: Elementary School Teachers’ Perceptions On Academic Performance, Jovette Brown

Walden Dissertations and Doctoral Studies

Intergenerational programs bring together two or more generations and engage them in shared activities that inspire, educate, and advance their mutual well-being. Current literature on intergenerational programs involving elementary school children and older individuals describes benefits for both groups. However, most studies concentrate on the benefits for the older adult participants. The purpose of this generic qualitative research study was to explore elementary school teachers’ perceptions of the academic performance of students who participated in an intergenerational program with older adults. The theoretical framework consists of four processes of modeling a social learning theory component. A purposeful sampling of eight …

Exploration Of General Education Teachers’ Self-Efficacy Regarding Inclusive Teaching Strategies In A West African School, Susan Regina Robinson

Walden Dissertations and Doctoral Studies

Limited research has existed regarding general education teachers’ perception of self-efficacy in teaching in the inclusive classroom in Central Ghanaian schools where performance outcomes fall below government standards. The purpose of this qualitative study was to examine general education teachers’ perceptions of self-efficacy regarding the implementation of inclusive teaching strategies at a Central Ghanaian school. Bandura’s social cognitive theory was the conceptual framework of this study. The research questions focused on teachers’ perception of self-efficacy in the implementation of instruction in the inclusive classroom and whether professional development was essential to their capacity to implement inclusive instruction. For this basic …

Characterizing The Progression From Mild Cognitive Impairment To Dementia: A Network Analysis Of Longitudinal Clinical Visits, Ronald C Petersen, Jennifer St Sauver, Sunghwan Sohn

Faculty, Staff and Student Publications

Background: With the recent surge in the utilization of electronic health records for cognitive decline, the research community has turned its attention to conducting fine-grained analyses of dementia onset using advanced techniques. Previous works have mostly focused on machine learning-based prediction of dementia, lacking the analysis of dementia progression and its associations with risk factors over time. The black box nature of machine learning models has also raised concerns regarding their uncertainty and safety in decision making, particularly in sensitive domains like healthcare.

Objective: We aimed to characterize the progression of health conditions, such as chronic diseases and neuropsychiatric symptoms, …

An Age-Structured Model For The Effects Of Temperature And Rainfall On The Transmission Dynamics Of Malaria, Alanus Mapunda, Eunice Mureithi, Nyimvua Shaban

Tanzania Journal of Science

This study has investigated the impact of temperature and rainfall on the transmission dynamics of malaria using an age-structured population model, with a class of pregnant women. The equilibrium solutions have been analyzed, and numerical simulations carried out. The results show that there are significantly high rates of malaria infections for the temperature and rainfall ranging between (23.53 0C − 39.80 0C) and (14.82 mm − 38.44 mm) respectively. The results have shown that, the most affected populations are children up to five years old and pregnant women, and that decreasing the rate of transplacental transmission increases the number of …

Cognitive Landscapes: Argument Evaluations, Misinformation Corrections, And Racial Attitudes In Modern Media, Dominique Lockett

Arts & Sciences Graduate Student Theses and Dissertations

This dissertation explores three critical aspects of communication that significantly impact how individuals process information and form opinions in today's polarized media landscape. While the experiments in each chapter do not directly interact, they collectively illuminate the complex interplay of cognitive biases, misperceptions, and counter-normative speech in shaping public discourse. The first chapter examines argument congruency bias, demonstrating how individuals evaluate arguments based on their alignment with pre-existing beliefs while still distinguishing between strong and weak reasoning. It also investigates the potential of objectivity priming to mitigate these biases, yielding insights into the challenges of overcoming ingrained cognitive patterns. The …

Grades 2–4 Teachers’ Experiences Remediating Learning Loss In Reading, Lauren Suzanne Marrocco

Walden Dissertations and Doctoral Studies

The problem addressed through this study was that Grades 2–4 teachers in a New England urban elementary school district are challenged to remediate student learning loss in reading achievement. In the district, there was documented low reading proficiency for Grades 2-4 over the past 5 years, including before, during, and after the COVID-19 pandemic. The purpose of this basic qualitative study was to explore the experiences of Grade 2–4 teachers remediating learning loss. The connected learning model, developed by Houghton Mifflin Harcourt, was the conceptual framework for this study. The research question focused on the experiences of Grades 2-4 reading …

Examining The Relationship Between Employment And Health Status Among Adults With Autism Spectrum Disorder (Asd) In The United States, Winifred Beckles

Walden Dissertations and Doctoral Studies

Autism spectrum disorder (ASD), characterized by challenges in social communication and repetitive behaviors, is a developmental disability that impacts over five million adults in the United States. Despite the significant amount of research literature on the association between health and employment in the general population, there remains a gap in research on the relationship between health and employment in adults with autism. Utilizing the Social Ecological Model (SEM) framework, this study examined whether there is a relationship between employment, current living status, non-paid activities, United States Census regions, type of health insurance, and health status when controlling for age, race, …

Personalized Learning Path Problem Variations: Computational Complexity And Ai Approaches, Sean A. Mochocki, Mark Reith, Brett J. Borghetti, Gilbert L. Peterson, John Jasper, Laurence D. Merkle

Faculty Publications

E-learning courses often suffer from high dropout rates and low student satisfaction. One way to address this issue is to use personalized learning paths (PLPs), which are sequences of learning materials that meet the individual needs of students. However, creating PLPs is difficult and often involves combining knowledge graphs (KGs), student profiles, and learning materials. Researchers typically assume that the problem of creating PLPs belong to the nondeterministic polynomial (NP)-hard class of computational problems. However, previous research in this field has neither defined the different variations of the PLP problem nor formally established their computational complexity. Without clear definitions of …