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Eigenvalue Continuity And Gersgorin's Theorem, Chi-Kwong Li, Fuzhen Zhang

Mathematics Faculty Articles

Two types of eigenvalue continuity are commonly used in the literature. However, their meanings and the conditions under which continuities are used are not always stated clearly. This can lead to some confusion and needs to be addressed. In this note, the Geršgorin disk theorem is revisited and the issue concerning the proofs of the theorem by continuity is clarified.

Childhood Anxiety Disorders: A Look Into Selective Mutism, Katelyn R. Campbell Ms.

Honors Theses

More than likely, a child will encounter a medical or educational professional to help them throughout their educational career sometime in their lives. Speech-language pathologists regularly see students from general education classrooms to special education classrooms. However, some disorders require multiple professionals to work as a team to ensure the child is functioning appropriately for his/her age. Selective mutism is a childhood anxiety disorder that causes such anxiety to the point where the child is unable to speak. Due to this being a frequent misdiagnosed disorder, a team of professionals is required to treat it. For this study, graduate students …

Nanopatterned Silk Fibroin Films With High Transparency And High Haze For Optical Applications, Corey Malinowski, Fengjie He, Yihong Zhao, Ivan Chang, David W. Hatchett, Shengjie Zhai, Hui Zhao

Chemistry and Biochemistry Faculty Research

Simultaneous high transparency and high haze are necessary for high-efficiency optical, photonic, and optoelectronic applications. However, a typical highly transparent film lacks high optical haze or vice versa. Here, we report a silk fibroin-based optical film that exhibits both ultrahigh optical transparency... (See article for full abstract).

Teaching K-6 Computer Science: Teacher And Student Attitudes And Self-Efficacy, Stacie Lee Mason

Theses and Dissertations

This article-format dissertation addresses elementary student and teacher attitudes and self-efficacy for computer science. The first article (Mason & Rich, in press) describes what the literature says about preservice and inservice training to help K-6 teachers increase knowledge and self-efficacy to teach computer science. The second article (Mason, West, & Leary, under review) describes an effort to provide training for local elementary school teachers to teach computational thinking with robots. The third article (Mason & Rich, under review) describes how we developed and validated an instrument to assess K-8 students' coding attitudes and beliefs, including perceived self-efficacy, interest, utility value, …

Characterization And Modeling Of The Martensite Transformation In Advanced High-Strength Steels, Stephen Roy Cluff

Theses and Dissertations

Multiple studies on the microstructures of advanced high-strength steels are presented here that seek to add to the already substantial body of knowledge on martensite in steel. These studies seek to gain additional insight into the role that the martensite transformation has on the observed mechanical properties of modern steels. Crystallographic Reconstruction of Parent Austenite Twin Boundaries in a Lath Martensitic Steel The study of post-transformation microstructures and their properties can be greatly enhanced by studying their dependence on the grain boundary content of parent microstructures. Recent work has extended the crystallographic reconstruction of parent austenite in steels to include …

Wave Scattering By A Floating Porous Elastic Plate Of Arbitrary Shape: A Semi-Analytical Study, Siming Zheng, Michael H. Meylan, Lin Fan, Deborah Greaves, Gregorio Iglesias

School of Engineering, Computing and Mathematics

No abstract provided.

Computing General Observables In Lattice Models With Complex Actions, O Francesconi, M Holzmann, B Lucini, A Rago, J Rantaharju

School of Engineering, Computing and Mathematics

The study of QFTs at finite density is hindered by the presence of the so-called sign problem. The action definition of such systems is, in fact, complex-valued making standard importance sampling Monte Carlo methods ineffective. In this work, we shall review the generalized density of states method for complex action systems and the Linear Logarithmic Relaxation algorithm (LLR). We will focus on the recent developments regarding the bias control of the LLR method and the evaluation of general observables in the DoS+LLR framework. Recent results on the well-known relativistic Bose gas will be presented, proving that in our approach the …

The Efficacy Of Comedy, Mark Anthony Castricone

USF Tampa Graduate Theses and Dissertations

The Efficacy of Comedy: Focusing on the efficacy of comedy as a genre, utilizing Aristotle, Nietzsche, and Heidegger’s philosophy. It begins with a historical analysis of the efficacy of comedy in Ancient 4th and 5th century Athens focusing on Aristotle’s conceptions of comedy. It analyses what Aristotle wrote about comedy and attempts a reconstruction of what his book on comedy from the poetics may have said. It then examines the shift to aesthetics rather than the Philosophy of Art with a focus on Kant and the Critique of Judgment. Comedy here is used as an interpretive tool in order to …

Late Jurassic Dinosaurs On The Move, Gastroliths And Long-Distance Migration, Josh Malone

Geography: Student Scholarship & Creative Works

The Jurassic Morrison Formation of the Rocky Mountain and Colorado Plateau regions is famous for its dinosaur fossils. The Morrison Formation (150-157 Ma) is comprised mostly of sandstone and mudstone that was deposited in a terrestrial deposition system that included fluvial, paludal, and lacustrine environments. Paleocurrent data indicates that Morrison sediment was transported to the north and east. Within the Morrison Formation, we find exotic pebble and cobble-size durable clasts of quartzite, chert and vein quartz weathering out of the mudstone paleosols. We interpret these exotic clasts as gastroliths, carried within the gastric mills of dinosaurs. For this study, we …

Plastic Fast, Maureen E. Schlangen

Roesch Library Staff Publications

In the era of Silent Spring, the first Earth Days and the “Keep America Beautiful” campaigns in the 1970s, littering was just the tip of the pollution iceberg. It still is. The bigger problems are demand and production. A June 2018 article in National Geographic found that worldwide, we produce almost 500 million tons of plastic every year — and about 40 percent is tossed after one use. According to the nonprofit Plastic Oceans, more than 8 million tons of plastic go into the oceans each year; production of plastic water bottles alone has grown from 3.8 billion in 1996 …

Factor Analysis Of Mixed Data (Famd) And Multiple Linear Regression In R, Nestor Pereira

Dissertations

In the previous projects, it has been worked to statistically analysis of the factors to impact the score of the subjects of Mathematics and Portuguese for several groups of the student from secondary school from Portugal.

In this project will be interested in finding a model, hypothetically multiple linear regression, to predict the final score, dependent variable G3, of the student according to some features divide into two groups. One group, analyses the features or predictors which impact in the final score more related to the performance of the students, means variables like study time or past failures. The second …

What Might Democratic Self-Governance In A Complex Social World Look Like?, Gerald Gaus

San Diego Law Review

The crisis facing democratic self-government is first and foremost a crisis of self-governance, not of democracy.

Section II reviews the nature of complex systems and why our contemporary social and economic order qualifies as technically complexindeed, increasingly so—and why explicit overall, directed reform of our social world is hopeless. But hope is not easily abandoned: Section III critically looks at two continuing sources of hope. Section IV then turns to a critical issue: If not by central direction, how do such complex systems achieve orderliness and functionality? Section V turns to the heart of the matter: is democratic self-governance viable …

Object Detection In High Resolution Aerial Images And Hyperspectral Remote Sensing Images, Yilong Liang

Theses

With rapid developments in satellite and sensor technologies, there has been a dramatic increase in the availability of remotely sensed images. However, the exploration of these images still involves a tremendous amount of human interventions, which are tedious, time-consuming, and inefficient. To help imaging experts gain a complete understanding of the images and locate the objects of interest in a more accurate and efficient way, there is always an urgent need for developing automatic detection algorithms. In this work, we delve into the object detection problems in remote sensing applications, exploring the detection algorithms for both hyperspectral images (HSIs) and …

Research Performance In The Field Of Big Data In India: A Scientometric Analysis Based On Scopus Database, Dr.Suchetan Kumar, Md Safiqur Rahaman

Library Philosophy and Practice (e-journal)

Abstract: The present study has been carried out to find out the research performance in the field of big data in India during 2010-2019 as indexed in the Scopus database. A total 7502 research publication has been found in the Scopus during the 10 years period of 2010-2019 and were downloaded for analyze with the help of Microsoft excel and vosviewer. The study also provide comparative performance of different Scientometric parameters including total research productivity, yearly research output, authorship pattern, International collaboration, Institution wise collaboration, Degree of collaboration, RGR & DT, Source wise research publication, Subject wise publication, and most …

Global Impacts From Improved Tropical Forages: A Meta-Analysis Revealing Overlooked Benefits And Costs, Evolving Values And New Priorities, Douglas S. White, Michael Peters, Peter Horne

IGC Proceedings (1977-2023)

The wider use and improved performance of planted tropical forages can substantially change social, economic and environmental landscapes. By reviewing impact-related studies published in the past two decades, this paper shows how evolving development priorities have influenced the types of impacts being documented. A meta-analysis was used to examine 98 studies according to: (1) breadth of reported effects, as related to development goals of social equity, economic growth and environmental sustainability; (2) extent of effects, ranging from intermediate to longer-term impacts; and (3) measurement precision (identification, description and quantification). Impacts have been assessed for fewer than half of the documented …

Cellular Causes For Leaf Elongation Reductions Under Salinity In Panicum Coloratum, Leandro Cáceres, Edith Taleisnik

IGC Proceedings (1977-2023)

Soil salinity is a growing constraint to crop and forage production worldwide and has driven the quest for salt-tolerant germplasm. Perennial forage grasses are regarded as choice alternative for the productive use of saline areas as well as for mitigating salinity in these areas (Ridley and Pannell 2005). Panicum coloratum L. is a C4 perennial grass native to tropical Africa, adapted to a wide range of rainfall conditions which makes it attractive as a forage for semiarid areas (Jones 1985). In forage grasses, yield is directly related to leaf area expansion and duration and the purpose of this work was …

Response Of Axonopus Catarinensis And Arachis Pintoi To Shade Conditions, A. N. A. Pachas, E. J. Jacobo, M. C. Goldfarb, S. M. Lacorte

IGC Proceedings (1977-2023)

In the north-east of Argentina, there are more than 100,000 hectares of silvopastoral systems where trees, forages and livestock are combined with the goal to diversify income, reduce financial risk, obtain more profit and enhance environmental benefit (Cubbage et al. 2013). The rapid adoption of this production system by farmers has generated high demand for information on shade tolerant grass and legume forage species.

Axonopus catarinensis is a native grass from Itajai Vally (Brazil) that was introduced to the north-east of Argentina 10 years ago; whereas Arachis pintoi is a sub-tropical legume (also native to Brazil) adapted to acid …

The Growth Response Of Tropical And Sub-Tropical Forage Species To Increasing Salinity, Hayley E. Giles, Christopher J. Lambrides, Scott A. Dalzell, David C. Macfarlane, H. Max Shelton

IGC Proceedings (1977-2023)

There is currently a growing coal seam gas (CSG) industry in Queensland, Australia. The industry requires beneficial-use strategies to consume the significant volumes of water released during CSG extraction. Irrigation of tropical and sub-tropical forage species for beef production is one option, however coal seam (CS) water is of varying quality due to moderate to high salinity and alkalinity. The application of chemically amended CS water over time could potentially increase soil salinity, which is known to reduce plant biomass production. While there were studies of salinity tolerance of many tropical and sub-tropical forage species 30 years ago, there is …

Measuring Summer Dormancy Of Perennial Grasses In Contrasting Environments, Mark R. Norton, Richard A. Culvenor, Florence Volaire

IGC Proceedings (1977-2023)

The summer dormancy trait has been shown to confer enhanced levels of survival to temperate perennial forage species over long periods of intense summer drought (Volaire and Norton 2006) and is therefore valuable in plant improvement. Normally found in species endemic to drier Mediterranean climates it is recommended that the trait be measured in the field under typical Mediterranean hot, dry summer conditions (Norton et al. 2008). However, this trait has potential utility in regions with summers that can receive substantial rainfall, but still experience extended periods of intense moisture deficit. Therefore, it is important to determine whether summer …

Generation Of Transgenic Tall Fescue Plants With Enhanced Abiotic Stress Tolerance, I. Alam, Y. G. Kim, K. H. Kim, N. Y. Ahn, B. H. Lee

IGC Proceedings (1977-2023)

Environmental stresses, such as drought, salinity and temperature extremes significantly decrease the yield of forage crops. Therefore, traits associated with abiotic stress-tolerance are of prime importance for their improvement. Biotechnological approaches have the potential to accelerate and complement conventional breeding by extending the range of gene sources for valuable traits, thus offering new opportunities for forage improvement. Transgenic technology appears as an efficient biotechnological tool of molecular breeding for improving forage quality and yield as well as tolerance to various environmental stresses. Occurrence of high level of reactive oxygen species (ROS) is a common phenomenon in abiotic stress-challenged plants. Plants …

Physiological Response Of 14 Lotus Tenuis Genotypes Subjected To Drought Conditions, Luis Inostroza, Hernán Acuña

IGC Proceedings (1977-2023)

Lotus tenuis L. is a perennial forage species of European origin. It is found in Chile in a wide range of environments between the Valparaíso (32°S) and Bíobío Regions (38°S), with a strong presence in areas with clay and volcanic soils of medium texture with problems of moisture retention. The Instituto de Investigaciones Agropecuarias (INIA) perennial forage legume breeding program has focused on developing drought-tolerant cultivars of the species. A population of 100 individuals was selected in previous studies, and all individuals were agronomically and physiologically characterized under field and greenhouse conditions. Results led to the selection of a sub-population …

Scenario Analysis: Risk And Return Of Aluminium Tolerant Lucerne, Claire D. Lewis, J. L. Jacobs, K. F. Smith, G. Spangenberg, B. Malcolm

IGC Proceedings (1977-2023)

Lucerne (Medicago sativa) yield is limited by aluminium stress associated with acid soils (Campbell et al. 1988; Scott et al. 2008). With the aid of transgenic technologies, the development of aluminium tolerant (Al Tol) lucerne is proposed. Modelled scenario analysis was conducted to explore the potential net benefits of Al Tol lucerne as part of a grazing system for a sheep production system in the high rainfall zone of south west Victoria.

Germplasm Evaluation And Frost Tolerance Improvement Of Setaria Sphacelata In Uruguay, Rafael Reyno, Javier Do Canto, Daniel Real

IGC Proceedings (1977-2023)

Setaria sphacelata (Schumach.) Stapf & C.E. Hubb is a highly productive warm-season grass that has been eva-luated in Uruguay since the 1970s (Mas 2007). It is one of the most productive and promising subtropical grasses for the Uruguayan climatic conditions. Some of the most re-markable attributes of interest are its palatability, ease to establish from seed, highly persistent, adapted to a wide range of soils, and some frost tolerance. Cultivars ‘Narok’ and ‘Kazungula’ were the only materials evaluated and no genetic improvement was conducted in Uruguay. These cultivars present some limitations, such as low seed yields and quality, and susceptibility …

Effects Of Organic Acids On Alleviation Of Aluminum Toxicity In Alfalfa, Yuan An, Peng Zhou

IGC Proceedings (1977-2023)

On a global scale, acidic soils cover an estimated 37.8 million km² of the earth's surface, and up to 50% of the world’s potentially arable soils are acidic. Aluminum (Al) is highly abundant in acid soil conditions. At low (< 5.5) pH, a toxic form of aluminum, Al³⁺, is solubilized from aluminosilicate clay minerals into soil solutions. High concentrations of Al_³⁺ in soil solutions caused seriously damage to plants by enhancing lipid per-oxidation, limiting root elongation and nutrient uptake, as well as decreasing plant growth (Kochian et al. 2005). Al toxicity represents one of the most important constraints for agricultural production in areas …

Performance Of Some Forages Species (Festuca Arundinacea L., Chloris Gayana Var. Katambora, Lotus Corniculatus L. And Medicago Sativa L.) In Saline Soil, Süleyman Temel, Uğur Şimşek, Bilal Keskin, İbrahim H. Yılmaz

IGC Proceedings (1977-2023)

Salinity is a soil degradation process which reduces plant diversity and agricultural productivity, decreases fertility and devalues the land in regions with arid and semi-arid climate. This process inhibits water and nutrient intake of plants from soil due to changeable nitrogen percentage and/or the intensity of soluble salt concentration. When the fact that agricultural lands are limited around the world and that the need for nutrition increases incrementally is taken into consideration, it is obvious that available lands should be used more effectively. Hence, it is quite crucial to reclaim saline soil and utilize it more economically (Woods 1996).

Salt Secretion Is Essential For Xero-Halophyte Reaumuria Soongorica Responding To Osmotic Stress, Ai-Ke Bao, Hang-Yu Zhou, Suomin Wang

IGC Proceedings (1977-2023)

Reaumuria soongorica, a xero-halophyte semi-shrub belonging to Tamaricaceae with excellent adaptability to adverse arid and salinity environments of northwest China, serves important ecological roles in the improvement of saline-alkali soil and dune stabilisation, and also is an attractive fodder shrub in desert steppe (Ma et al. 2011). Previous studies demonstrated that secreting salt via salt glands is an important strategy for R. soongorica adapting to high salinity environments (Zhou et al. 2012). However, very little is known about the role of salt secretion in the plant’s responses to drought. Therefore, in the present work, R. soongorica seedlings …

Assessment Of Summer Drought Tolerance And Persistence Of Some Grass Cultivars In Algerian Semi Arid Conditions, Mohamed Mefti, Hamena Bouzerzour, Abderrezak Chebouti, Aissa Abdelguerfi

IGC Proceedings (1977-2023)

Stress-tolerant forage resources are increasingly needed for the environmental and economic sustainability of extensive Mediterranean livestock systems. Perennial forages belonging to two species: Festuca arundinacea Schreb. (tall fescue) and Dactylis glomerata L. (cocksfoot) can be a valuable alternative to annuals, if they can survive across successive summer droughts. Poor persistence of sown perennial pasture grasses is a problem in regions of the World with Mediterranean climates where the most stressful, life threatening season is a summer characterised by long and often severe droughts with high temperatures. The objective of this study is to compare 14 grass cultivars in an Algerian …

Summer Dormancy And Survival Of Tall Fescue In Relation To Endophyte Presence, J. L. Thomas, Charles P. West, D. P. Malinowski

IGC Proceedings (1977-2023)

True summer dormancy in temperate perennial grasses is the ability to survive summer stresses by ceasing growth and senescing vegetative tissues independently of water supply, as opposed to summer-active grasses, which respond to rains by continuing growth, but senesce during droughts (Volaire and Norton 2006). Summer dormancy is a common drought-escape mechanism for Mediterranean-origin perennial grasses, but is also being considered as a potentially useful trait in semiarid to humid zones whose climates are not strictly Mediterranean, but where temperate grass survival is threatened by summer heat and water deficits (Malinowski et al. 2005). Moreover, summer dormancy may provide …

Screening Of Ssr Primers And Evaluation Of Salt Tolerance In 20 Sweet Sorghum Varieties For Silage, Qiuwen Zhan, Chunfei Shu, Xiaoliang Li, Min Zhan, Jieqin Li, Ping Lin

IGC Proceedings (1977-2023)

Sweet sorghum belongs to the genus Sorghum in the family Gramineae. It is a variant of common grain sorghum, with characteristics of resistance to drought, flood, barren soil and soil salinity and alkalinity (Zhan et al. 2008). Since the stem of sweet sorghum is rich in sugar, it is usually harvested as silage fodder in grasslands. Often arable land used for forage production is salt-affected. Chinnusamy et al. (2005) have screened and identified a large range of different varieties for salinity tolerance, but there are no published reports of studies screening SSR primers and evaluating the salt tolerance in …

Plantain (Plantago Lanceolata) Outperforms Chicory (Cichorium Intybus) Under Moisture Stress In Glasshouse, Lydia M. Cave, Peter D. Kemp, Paul R. Kenyon, Stephen T. Morris

IGC Proceedings (1977-2023)

Forage chicory (Cichorium intybus) and plantain (Plantago lanceolata) are now widely used throughout the world as high feed quality perennial herbage (Sanderson et al. 2003; Labreveux et al. 2006; Li et al. 2010; Golding et al. 2011; Hutton et al. 2011). Both are taprooted plants and are thus likely to confer a degree of drought tolerance through accessing water deeper in the soil profile (Kemp et al. 2010). Nie et al. (2008) reported chicory can tolerate moisture stress to a greater degree than plantain. However, overall little is known …