Digital Commons Network^™

Summer/Fall 2020 Commencement Program, University Of Alabama In Huntsville

Commencement Programs

No abstract provided.

Inequality Measures: The Kolkata Index In Comparison With Other Measures, Suchismita Banerjee, Bikas K. Chakrabarti, Manipushpak Mitra, Suresh Mutuswami

Journal Articles

We provide a survey of the Kolkata index of social inequality, focusing in particular on income inequality. Based on the observation that inequality functions (such as the Lorenz function), giving the measures of income or wealth against that of the population, to be generally nonlinear, we show that the fixed point (like Kolkata index k) of such a nonlinear function (or related, like the complementary Lorenz function) offer better measure of inequality than the average quantities (like Gini index). Indeed the Kolkata index can be viewed as a generalized Hirsch index for a normalized inequality function and gives the fraction …

Reviewing Pesticide Impacts On Frogs To Suggest Management Applications In The Gambles Mill Eco-Corridor, Marc Gorman

Environmental Studies Senior Seminar Projects

For years, frog populations have been declining due to a variety of anthropogenic sources, including pesticide use. Pesticides work by inhibiting bodily functions in their target pest species, though they frequently have unintentional impacts on other life forms in an ecosystem. Some researchers have evaluated these effects, but their studies mainly focus on finding an LC50 - a concentration that will kill 50% of their test species sample. However, these LC50 levels are often higher than what would be found in nature, and pesticides have been shown to still impact species at lower concentrations. Thus, this study attempted to summarize …

Probing The Impacts Of Ultra-Low Platinum Loadings On Membrane Degradation Mechanisms, Andre J. Spears

Nanoscience and Microsystems ETDs

Membrane chemical degradation is one of many factors that can impact fuel cell durability. The fuel cell’s performance and lifetime heavily depends on the membrane and its ability to maintain chemical and mechanical integrity. In Nafion^® membranes, hydroxyl radicals are the primary cause of chemical membrane degradation as they attack the membrane’s polymer structure. Radical formation can ensue via peroxide decomposition at the cathode or gases reacting on Pt particles or contaminants like Fe (a fenton's reagent) within the membrane. As radicals attack the membrane’s polymer structure the membrane thins, and fluoride and sulfate ions are released. This consequently …

Elementary Teachers’ Responsiveness To Supporting Students’ Engineering Design Feedback, Jeffrey Radloff, Brenda Capobianco

Purdue Center for Early Learning Faculty and Staff Publications

Using engineering design to teach science requires teachers to engage in noticing, interpreting, and responding to students’ needs in real-time. While research has begun to focus on how elementary teachers do so, less is known about how teachers instructionally support and optimize students’ ideas through engineering design feedback. In this study we investigate what instructional moves two elementary teachers’ employ to leverage students’ ideas and reasoning and create opportunities for students to exchange design feedback. Data were gathered using classroom observations of teachers’ implementations of a design task focused on sound and energy transformation. Observations were coded for teachers’ use …

Metabolit Sekunder Sekresi Jamur Penicillium Spp. Isolat Tanah Gambut Riau Sebagai Antijamur Candida Albicans, Yuana Nurulita, Yuharmen Yuharmen, Nuryani Nenci, Ayu Octa Mellani, Titania Tjandarawati Nugroho

Chimica et Natura Acta

Mikroba dan tanaman merupakan sumber metabolit sekunder yang aktif dieksplorasi potensinya. Laboratorium Enzim, Fermentasi dan Biomolekuler Jurusan Kimia FMIPA Universitas Riau telah mengisolasi beberapa jenis mikroba khususnya jamur dari tanah gambut Hutan Primer Cagar Biosfer Giam Siak Kecil Bukit Batu (GSKBB) Provinsi Riau. Beberapa isolat tersebut adalah jamur Penicillium sp. LBKURCC29 dan LBKURCC30 yang memiliki potensi menghasilkan enzim selulase. Tujuan dari penelitian ini adalah untuk mengeksplorasi potensi lain dari kedua jamur isolat lokat tanah gambut Riau tersebut dalam hal ini potensi sebagai sumber antimikroba, antijamur Candida albicans. Produksi metabolit sekunder antijamur dilakukan dengan cara fermentasi batch dalam media cair yang …

Faculty Senate Executive Committee Agenda, December 14, 2020, Utah State University

Faculty Senate & Faculty Senate Executive Committee

• EPC monthly report
• HR 385 Code Change
• Council on Teacher Education Annual Report
• Scholarship Advisory Board Annual Report
• USUSA Annual Report
• 404.3.6 Code
• Ombudsperson Report
• USU Promotion and Tenure Process Survey
• Dixie State Resolution

Modeling Fluidized Bed Combustion Of Liquid Fuel., Farouk Mohamed El-Sayed

Mansoura Engineering Journal

A mathematical model has been developed 10 predict the combustion of liquid fuel in a fluidized bed. From the fluid-dynamic point of view, the model is based on the modified two-phase theory of fluidization where the gas in the bed is assumed to have three phases. A jet-bubble phase which is fuel rich bubbles formed at fuel feeding jet, a distributor-bubble phase which is fuel free bubbles generated at distributor plate and an emulsion phase. Each phase has its composition and exchanges masses with the other two ones. The bubble is assumed to have a constant size throughout the bed. …

Two New Finite Element Schemes And Their Analysis For Modeling Of Wave Propagation In Graphene, Jichun Li

Mathematical Sciences Faculty Research

© 2020 The Author(s) In this paper, we investigate a system of governing equations for modeling wave propagation in graphene. Compared to our previous work (Yang et al., 2020), here we re-investigate the governing equations by eliminating two auxiliary unknowns from the original model. A totally new stability for the model is established for the first time. Since the finite element scheme proposed in Yang et al. (2020) is only first order in time, here we propose two new schemes with second order convergence in time for the simplified modeling equations. Discrete stabilities inheriting exactly the same form as the …

Sybil Defense Using Efficient Resource Burning, Diksha Gupta

Computer Science ETDs

In 1993, Dwork and Naor proposed using computational puzzles, a resource burning mechanism, to combat spam email. In the ensuing three decades, resource burning has broadened to include communication capacity, computer memory, and human effort. It has become a well-established tool in distributed security. Due to the cost attached to utilizing resource burning mechanism, these have not been popularized in domains apart from cryptocurrency.

In this dissertation, we design efficient resource burning based Sybil defense techniques for permissionless systems. As a first step, we identify existing resource burning mechanisms in literature in Chapter 2. Additionally, we enumerate numerous open problems …

Outdoor Air Pollution Exposure And Inter-Relation Of Global Cognitive Performance And Emotional Distress In Older Women, Andrew J. Petkus, Xinhui Wang, Daniel P. Beavers, Helena C. Chui, Mark A. Espeland, Margaret Gatz, Tara Gruenewald, Joel D. Kaufman, Joann E. Manson, Susan M. Resnick, James D. Stewart, Gregory A. Wellenius, Eric A. Whitsel, Keith Widaman, Diana Younan, Jiu-Chiuan Chen

Psychology Faculty Articles and Research

The interrelationships among long-term ambient air pollution exposure, emotional distress and cognitive decline in older adulthood remain unclear. Long-term exposure may impact cognitive performance and subsequently impact emotional health. Conversely, exposure may initially be associated with emotional distress followed by declines in cognitive performance. Here we tested the inter-relationship between global cognitive ability, emotional distress, and exposure to PM2.5 (particulate matter with aerodynamic diameter 2 (nitrogen dioxide) in 6118 older women (aged 70.6 ± 3.8 years) from the Women’s Health Initiative Memory Study. Annual exposure to PM_2.5 (interquartile range [IQR] = 3.37 μg/m³) and NO₂ (IQR …

Fractal And Edge-Based Techniques For Kidney Enhancement And Segmentation On Magnetic Resonance Images (Mri), Alaá Rateb Mahmoud Al-Shamasneh

Student Works (2020-2029)

Recently, many rapid developments in digital medical imaging have made further contributions to healthcare systems. However, the segmentation of regions of interest in medical images plays a vital role in assisting doctors in their medical diagnoses and for the early detection of disease. Since health issues related to the kidneys are increasing exponentially, this thesis focused on developing methods for the segmentation of MRI images of the kidney. Kidney images frequently suffer from low contrast, low resolution and noise, and are blur. Hence, it is necessary to enhance the images in order to improve the segmentation. Therefore, the current thesis …

Short Term Variations In The Leaf Area Index, Tiller Density And Botanical Composition Of The Grassland In Inner Mongolia As Affected By Light To Very Heavy Grazing Intensities, H. Wan, P. Schönbach, M. Gierus, Anne Schiborra, Y. Bai, Friedhelm Taube

IGC Proceedings (1977-2023)

No abstract provided.

The Use Of Concentrate Supplements To Overcome Seasonal Shortages Of Grazed Herbage In Beef Production Systems, Valéria P. B. Euclides, Kepler Euclides Filho, Fernando Paim Costa, Alexandre Scaff Raffia

IGC Proceedings (1977-2023)

No abstract provided.

Effects Of Novel Ryegrass Endophytes On Pasture Production And Milk Production From Dairy Cows In Northern New Zealand, Errol R. Thom, C. D. Waugh, E. M. K. Minneé, G. C. Waghorn, Alison J. Popay

IGC Proceedings (1977-2023)

No abstract provided.

The Cottonwood Ranch Riparian Management Case Study, Sherman Swanson, Kent Mcadoo, Agee Smith, Sandra Wyman

IGC Proceedings (1977-2023)

No abstract provided.

Grazing Itineraries And Feed Intake Of Goats On Communal Pastures Of The Jabal Al Akhdar Mountain Range, Northern Oman, E. Schlecht, U. Dickhoefer, M. Predotova, Andreas Buerkert

IGC Proceedings (1977-2023)

No abstract provided.

Timing Of Grazing Affects Sandhills Grassland Productivity And Diet Quality, W. H. Schacht, J. D. Volesky, P. R. Schroeder

IGC Proceedings (1977-2023)

No abstract provided.

Ever Graze‐More Livestock From Perennials, Geoffrey Saul, Angela Avery

IGC Proceedings (1977-2023)

No abstract provided.

Ever Graze‐Prime Lamb Production On Perennial Based Grasslands In Southwest Australia, Paul Sanford, J. Ryan, P. Jakobsson, E. Dobbe, E. Mccready

IGC Proceedings (1977-2023)

No abstract provided.

Production Raigras According Topographic Position And Year In Natural Grasslands Buenos Aires, Argentina, Mónica B. Sacido, Ezequiel M. Latorre, Verónica Porello, Gerardo Divino, Alejandro Quiaquinta

IGC Proceedings (1977-2023)

No abstract provided.

The System Of Music Education In Azerbaijan: The Role Of Sound Engineering And Concert Sound Engineering In The Educational Process, Aleksey Khmirov

Eurasian music science journal

The article considers the sphere of education, culture and art of Azerbaijan. The sphere of sound engineering, the issues of formation and development, tasks, and practical activities are studied. The research laboratory (acoustics laboratory) "Study of the Azerbaijan oral tradition of professional music and its new directions: organology and acoustics" is considered. Education, culture, art and music are the main objects of research in the artistic universities of Azerbaijan. A comparative analysis of the artistic universities of the Republic of Azerbaijan and Uzbekistan revealed the achievements and shortcomings of the two systems. The acoustic capabilities of concert halls and outdoor …

Operationalizing Niche Construction Theory With Stone Tools, Radu Lovita, David R. Braun, Matthew J. Douglass, Simon J. Holdaway, Sam C. Lin, Deborah I. Olsezewski, Zeljko Rezek

School of Natural Resources: Faculty Publications

One of the greatest difficulties with evolutionary approaches in the study of stone tools (lithics) has been finding a mechanism for tying culture and biology in a way that preserves human agency and operates at scales that are visible in the archaeological record. The concept of niche construction, whereby organisms actively construct their environments and change the conditions for selection, could provide a solution to this problem. In this review, we evaluate the utility of niche construction theory (NCT) for stone tool archaeology. We apply NCT to lithics both as part of the “extended phenotype” and as residuals or precipitates …

Adaptive Ensemble Of Classifiers With Regularization For Imbalanced Data Classification, Chen Wang, Chengyuan Deng, Zhoulu Yu, Dafeng Hui, Xiaofeng Gong, Ruisen Luo

Biology Faculty Research

The dynamic ensemble selection of classifiers is an effective approach for processing label-imbalanced data classifications. However, such a technique is prone to overfitting, owing to the lack of regularization methods and the dependence on local geometry of data. In this study, focusing on binary imbalanced data classification, a novel dynamic ensemble method, namely adaptive ensemble of classifiers with regularization (AER), is proposed, to overcome the stated limitations. The method solves the overfitting problem through a new perspective of implicit regularization. Specifically, it leverages the properties of stochastic gradient descent to obtain the solution with the minimum norm, thereby achieving regularization; …

Possible Transmission Flow Of Sars-Cov-2 Based On Ace2 Features, Sk Sarif Hassan, Shinjini Ghosh, Diksha Attrish, Pabitra Pal Choudhury, Alaa A A Aljabali, Bruce D Uhal, Kenneth Lundstrom, Nima Rezaei, Vladimir N Uversky, Murat Seyran, Damiano Pizzol, Parise Adadi, Antonio Soares, Tarek Mohamed Abd El-Aziz, Ramesh Kandimalla, Murtaza M Tambuwala, Gajendra Kumar Azad, Samendra P Sherchan, Wagner Baetas-Da-Cruz, Kazuo Takayama, Ángel Serrano-Aroca, Gaurav Chauhan, Giorgio Palu, Adam M Brufsky

All publications

Angiotensin-converting enzyme 2 (ACE2) is the cellular receptor for the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) that is engendering the severe coronavirus disease 2019 (COVID-19) pandemic. The spike (S) protein receptor-binding domain (RBD) of SARS-CoV-2 binds to the three sub-domains viz. amino acids (aa) 22-42, aa 79-84, and aa 330-393 of ACE2 on human cells to initiate entry. It was reported earlier that the receptor utilization capacity of ACE2 proteins from different species, such as cats, chimpanzees, dogs, and cattle, are different. A comprehensive analysis of ACE2 receptors of nineteen species was carried out in this study, and the …

Microstructural Constraints On The Nebular And Asteroidal Histories Of Calcium-Aluminum-Rich Inclusions From Cv3 Chondrites, Shaofan Che

Earth and Planetary Sciences ETDs

The petrology and mineralogy of calcium-aluminum-rich inclusions (CAIs) from CV3 carbonaceous chondrites have been investigated using transmission electron microscopy (TEM). The goal of this dissertation is twofold: (1) to gain new insights into the nebular processes, such as vapor-solid reactions, accretion, transport, that are responsible for the formation of non-igneous CAIs, and (2) to better understand the role of fluid in the secondary alteration of CAIs on the CV3 chondrite parent body. This work represents the first systematic microstructural study of CAIs from CV3 chondrites.

Chapter 2 presents the microstructural observations of primary mineralogies of fine-grained, spinel-rich inclusions (FGIs) from …

Coal Energy And Environmental Impacts: Introduction, Luis F. O. Silva, Amy L. Wolfe

Faculty, Staff, and Affiliated Publications--KGS

No abstract provided.

Intelligent Networks For High Performance Computing, William Whitney Schonbein

Computer Science ETDs

There exists a resurgence of interest in `smart' network interfaces that can operate on data as it flows through a network. However, while smart capabilities have been expanding, what they can do for high-performance computing (HPC) is not well-understood. In this work, we advance our understanding of the capabilities and contributions of smart network interfaces to HPC. First, we show current offloaded message demultiplexing can mitigate (but not eliminate) overheads incurred by multithreaded communication. Second, we demonstrate current offloaded capabilities can be leveraged to provide Turing complete program execution on the interface. We elaborate with a framework for offloading arbitrary …

Nyc Communities Battle Flooding, But Not From Coastal Storms, Danielle C. Cruz

Capstones

A look at the impact high-tide flooding and inland flooding has on various communities in New York City. This article also looks into what city officials are doing and not doing to address the concerns of residents who have had to deal with recurring flooding in their community.

Link to Capstone: https://danielle-cruz.format.com/nyc-communities-battle-flooding

Pertumbuhan Dan Hasil Benih Kentang G0 Kultivar Medians Pada Berbagai Komposisi Media Tanam Dan Interval Pemberian Air Di Dataran Medium, Jajang Sauman Hamdani, Sumadi, Kusumiyati, Haifa Ruwaidah

Jurnal Kultivasi

Benih merupakan kunci sukses budidaya kentang. Salah satu faktor yang mempengaruhi dan menjadi kendala produksi kentang di Indonesia adalah ketersediaan benih kentang yang memiliki kualitas dan kuantitas baik serta belum memenuhi kebutuhan permintaan benih petani kentang. Permasalahan produksi benih kentang generasi ke-0 (G0) adalah rendahnya jumlah ubi benih yang dihasilkan. Percobaan ini bertujuan untuk mengetahui interaksi antara komposisi media tanam dengan interval pemberian air terhadap produksi benih kentang G0 di dataran medium. Percobaan dilaksanakan di Kebun Percobaan, Fakultas Pertanian, Universitas Padjadjaran, Kampus Jatinangor. Rancangan percobaan yang digunakan yaitu Split Plot. Petak utama adalah komposisi media tanam yang terdiri dari campuran …