Physical Sciences and Mathematics Commons^™

A Modular Strategy For Expanding Electron-Sink Capacity In Noncanonical Cluster Assemblies, Yume Mai, Alexandria K. Balzen, Rebecca K. Torren, Michael P. Callahan, Adam C. Colson

Chemistry and Biochemistry Faculty Publications and Presentations

A modular synthetic strategy is described whereby organometallic complexes exhibiting considerable electron-sink capacity may be assembled by using only a few simple molecular components. The Fe₂(PPh₂)₂(CO)₅ fragment was selected as a common electroactive component and was assembled around aromatic cores bearing one, two, or three isocyanide functional groups, with the resultant complexes possessing electron-sink capacities of two, four, and six electrons, respectively. The latter complex is noteworthy in that its electron-sink capacity was found to rival that of large multinuclear clusters (e.g., [Ni₃₂C₆(CO)₃₆]^6– and [Ni_{38 …}

Metal Release From A Biomedical Cocrmo Alloy In Mixed Protein Solutions Under Static And Sliding Conditions: Effects Of Protein Aggregation And Metal Precipitation, Zheng Wei, Valentine Romanovski, Luimar Filho, Cecilia Persson, Yolanda S. Hedberg

Chemistry Publications

Biomedical materials made of cobalt-chromium-molybdenum (CoCrMo) alloys are commonly used in artificial prostheses and dental implants, which are exposed to friction and load. The release of Co, Cr, and Mo from these surfaces is governed by physical and chemical processes. The extent of measured metal release from biomedical CoCrMo alloys into mixed protein solutions may be influenced by protein aggregation and metal precipitation effects. Metal release from, and the surface composition of, a CoCrMo alloy was investigated in physiological relevant solutions (phosphate buffered saline, PBS, with varying concentrations of fibrinogen from bovine plasma and/or bovine serum albumin) at pH 7.3 …

Computing Agent Competency In First Order Markov Processes, Xuan Cao

Theses and Dissertations

Artificial agents are usually designed to achieve specific goals. An agent's competency can be defined as its ability to accomplish its goals under different conditions. This thesis restricts attention to a specific type of goal, namely reaching a desired state without exceeding a tolerance threshold of undesirable events in a first-order Markov process. For such goals, the state-dependent competency for an agent can be defined as the probability of reaching the desired state without exceeding the threshold and within a time limit given an initial state. The thesis further defines total competency as the set of state-dependent competency relationships over …

Final Project Report Nsf Award 1744490: Nsf Includes Ddlp: Leadership And Isteam For Females In Elementary School (Life): An Integrated Approach To Increase The Number Of Women Pursuing Careers In Stem, Bruce G. Bukiet, James Lipuma, Nancy Steffen-Fluhr

STEM for Success Resources

Disclaimer

This Project Outcomes Report for the General Public is displayed verbatim as submitted by the Principal Investigator (PI) for this award. Any opinions, findings, and conclusions or recommendations expressed in this Report are those of the PI and do not necessarily reflect the views of the National Science Foundation; NSF has not approved or endorsed its content.

The LiFE project created and studied a comprehensive program bringing together iSTEAM, holistic student growth, modern technologies, and other supports to engage girls in STEM experiences through a collective impact approach.

LiFE supported STEAM clubs with role models and utilized research-based best …

Zeros Of A Two-Parameter Family Of Harmonic Trinomials, David Work

Theses and Dissertations

This thesis studies complex harmonic polynomials of the form $f(z) = az^n + b\bar{z}^k+z$ where $n, k \in \mathbb{Z}$ with $n > k$ and $a, b > 0$. We show that the sum of the orders of the zeros of such functions is $n$ and investigate the locations of the zeros, including whether the zeros are in the sense-preserving or sense-reversing region and a set of conditions under which zeros have the same modulus. We also show that the number of zeros ranges from $n$ to $n+2k+2$ as long as certain criteria are met.

Productivity Of Intensive Grazing Systems Based Upon Irrigated Pangola Pastures In The French West Indies, G. Alexandre, M. Mahieu, G. Aumont, M. Naves

IGC Proceedings (1997-2023)

This work deals with the comparison of the productivity of intensive grazing systems (IGS) in the French West Indies, used for meat production with cattle, goat and sheep. IGS are based upon the use of irrigated, fertilized, and high stocked (1.8 to 1.4 t live weight/ha/year) and rotational grazing Digitaria decumbens pastures. They lie upon good performance levels of local breeds, Creole cattle and Creole goats of Guadeloupe and Martinik ewes, and upon improved general husbandry. Both sheep and goat in IGS exhibit high levels of productivity. They reached up to 1000 kg LW of weaned offsprings and 1400 kg …

Potential Of Crop Rotation Using Forages In The Tropics, P. L. Mafongoya

IGC Proceedings (1997-2023)

Soil fertility is a fundamental biophysical root cause of food insecurity sub-Saharan Africa. Low quality crop residues and grasses during the dry season also limit animal productivity. Forage legumes (herbaceous and tree legumes) have great potential to increase crop animal productivity. Technologies have been developed over the past 3 decades to fully integrate forage legumes into farming. Most of these technologies are still on shelves with low adoption by farmers. Rhe role of forage legumes in nutrient cycling is reviewed in this paper. The factor limiting adoption will also be discussed. Innovative dissemination pathways to increase adoption will be suggested.

The Role Of Forages In Sustainable Cropping Systems Of Southern Australia, William D. Bellotti

IGC Proceedings (1997-2023)

The historical context, recent trends, and possible future role of forages in cropping systems are reviewed. Three recent themes will be developed: 1) The successful exploitation of genetic diversity resulting in commercial development of new legume species as pasture cultivars with specific traits better suited to the needs of current farming systems. 2) Improved understanding of key soil processes under grazed pastures, particularly soil water and soil nitrogen, and how these processes impact on indicators of sustainability like deep drainage and nitrate leaching. 3) An emerging capacity for predicting the effect of pasture-crop sequences on soil processes, crop growth and …

Performance Of Millet Cultivars In Succession To Field Crop Of Beans In Southern Portion Of State Of Minas Gerais - Brazil, José C. Pinto, M. C. Maia, A. R. Evangelista, I. F. De Andrade, Joel Augusto Muniz, I. P. A. Dos Santos, E. R. P. Bomfim

IGC Proceedings (1997-2023)

This trial was carried out at the Department of Animal Science - Universidade Federal de Lavras (UFLA), from February to June, 1997. It was evaluated the performance of three millet [Pennisetum glaucum (L.) R. Br.] cultivars, as a second crop (Common, BN 2 and CMS 02) and four sowing dates (02/22, 03/14, 04/03 and 04/23). The three millet cultivars were sown after a cropping of beans (Phaseolus vulgaris L.) by the end of the rainy season, with no additional fertilization. It was used the randomized block design in a split-plot scheme, allocating the sowing dates on the main …

Performance Assessment Of Some Phishing Predictive Models Based On Minimal Feature Corpus, Orunsolu Abdul Abiodun, Sodiya A.S, Kareem S.O, Oladimeji G. B Mr.

Journal of Digital Forensics, Security and Law

Phishing is currently one of the severest cybersecurity challenges facing the emerging online community. With damages running into millions of dollars in financial and brand losses, the sad tale of phishing activities continues unabated. This led to an arms race between the con artists and online security community which demand a constant investigation to win the cyberwar. In this paper, a new approach to phishing is investigated based on the concept of minimal feature set on some selected remarkable machine learning algorithms. The goal of this is to select and determine the most efficient machine learning methodology without undue high …

Shape Similarity By Deformation Using Polynomial Transformation, Hanan M. Moussa

Archived Theses and Dissertations

No abstract provided.

Machine Learning For Stock Prediction Based On Fundamental Analysis, Yuxuan Huang, Luiz Fernando Capretz, Danny Ho

Electrical and Computer Engineering Publications

Application of machine learning for stock prediction is attracting a lot of attention in recent years. A large amount of research has been conducted in this area and multiple existing results have shown that machine learning methods could be successfully used toward stock predicting using stocks’ historical data. Most of these existing approaches have focused on short term prediction using stocks’ historical price and technical indicators. In this paper, we prepared 22 years’ worth of stock quarterly financial data and investigated three machine learning algorithms: Feed-forward Neural Network (FNN), Random Forest (RF) and Adaptive Neural Fuzzy Inference System (ANFIS) for …

Extracellular Vimentin As A Target Against Sars-Cov-2 Host Cell Invasion, Łukasz Suprewicz, Maxx Swoger, Sarthak Gupta, Ewelina Piktel, Fitzroy J. Byfield, Daniel V. Iwamoto, Danielle Germann, Joanna Reszeć, Natalia Marcińczyk, Robert J. Carroll, Paul A. Janmey, J. M. Schwarz, Robert Bucki, Alison E. Patteson

Physics - All Scholarship

Infection of human cells by pathogens, including SARS-CoV-2, typically proceeds by cell surface binding to a crucial receptor. The primary receptor for SARS-CoV-2 is the angiotensin-converting enzyme 2 (ACE2), yet new studies reveal the importance of additional extracellular co-receptors that mediate binding and host cell invasion by SARS-CoV-2. Vimentin is an intermediate filament protein that is increasingly recognized as being present on the extracellular surface of a subset of cell types, where it can bind to and facilitate pathogens’ cellular uptake. Biophysical and cell infection studies are done to determine whether vimentin might bind SARS-CoV-2 and facilitate its uptake. Dynamic …

Comprehensive Report On Extraterrestrial Resource Extraction, Robinson Raphael

Student Works

The prospect of asteroid mining provides a plethora of riches that include metals and water. As the number of discovered asteroids continues to grow, opportunities arise to commercialize these resources within Near-Earth Asteroids (NEAs). With urgent applications on Earth and in space, NEAs allow for a surge in sales. Planning forward, Astroider Aerospace Systems follows a mission split into four phases. Phase 1 develops a series of spacecraft using existing technologies, titled as Near-Earth Asteroid Miners and Near-Earth Asteroid Surveyors. Phase 2 first launches the surveyors to candidate NEAs, prospecting them for ores. To identify potential celestial bodies for this …

Difficulty In Video Games, Jason Bechdolt

ART 108: Introduction to Games Studies

Throughout time games have been utilized for a great variety of purposes: relaxing leisure, competitive activity, intellectual exercise, and many other sources of enjoyment. The element of difficulty has existed in various degrees throughout all of those game styles, usually found through the skill of an opponent, but lately many games have been designed to have a digital opponent to provide that difficulty. With access to more information than ever before, people have gotten the chance to witness lives and worlds that they can never physically enjoy, and this has led to a considerable market for games that can provide …

Mechanics Of Ascension Through Genshin Impact, Megan Chao

ART 108: Introduction to Games Studies

Genshin Impact, or Genshin for short, is a free roleplaying, open-world, adventure video game released for Playstation 4, Microsoft Windows, iOS, and Android on September 28th, 2020. Since its initial release, the game has gained considerable recognition for its storytelling ability, in-depth lore, and amazing character and world-building design. They were awarded Apple’s “Game of the Year” in 2020 and have grossed over $100 million from in-app iOS purchases alone.

Applying Simulated Annealing As An Intelligent Genetic Mutation Operator For Finding Most Probable Explanations On Bayesian Belief Networks, Sahr Attia Afara

Archived Theses and Dissertations

No abstract provided.

Forage Yield And Nutritive Value Of Spring Oats For Various Cultivars And Planting Dates At The Middle Mountain Area, S. Seo, W. H. Kim, D. E. Shin, G. J. Choi, G. J. Park

IGC Proceedings (1997-2023)

The experiment was carried out to determine the optimum cultivars and effects of planting date on growth, forage yield and nutritive value of spring sown oats (Avena sativa L.) at the middle mountainous area, Namwon, NLRI, Korea, 1998. The cultivars used in this study was Cayuse, Swan, Foothill, Cashel, Martlock and Winjardie, and the planting dates were 9, 14, 19, 24 and 29 March, and all the forages were harvested on 9 June. Swan among spring oats was the earliest heading type (21 May), and then Martlock (25 May), Winjardie (27 May), and Foothill was the latest (14 June). …

Performance Of Steers In Brachiaria Decumbens Pastures, Permanent And In Rotation With Soybean, L. A. Z. Machado, A. C. Fabrício, J. C. Salton

IGC Proceedings (1997-2023)

The integration agriculture/pasture is an alternative that allows countless benefits to the rural producer. At Embrapa Agricultural West four production systems were studied and two of them involved animal production. The systems Soybean/Pasture Rotation and Permanent Pasture were compared from september/98 to may/99. The availability and residue of dry matter of green leaves blades (DMGLB), stems (SDM) and senescent material, the gain/animal and gain/area was evaluated. The availability was monthly assessed. Herbage residue was higher in the Soybean/Pasture Rotation system. This system allowed gain/animal and gain/ha of 0.814 kg/day and 582 kg/ha, respectively, whereas the Permanent Pasture system the gain …

Integration Of Cattle And Improved Pastures Under Coconuts In Southern Luzon, Philippines, F. A. Moog, H. E. Diesta, A. G. Deocareza

IGC Proceedings (1997-2023)

Results of two studies involving 1) grazing of Signalgrass (Brachiaria decumbens) pastures at different stocking and 2) cut-and-carry forages in smallholder farms for cattle under coconuts are presented. Grazing at 3 AU/ha and 2 AU/ha gave significantly higher LWG/ha (P 0.05) over 1 AU/ha but highest financial return was obtained from 2 AU/ha. Productivity of cattle on cut-and-carry forages in small farms varies among farmers with better animal performance directly related to quantity and quality of feeds offered and industriousness of individual farmers. Both studies showed the benefits derived from integration of cattle with improved pastures under coconuts.

Alternative Cropping Systems With Self Reseeding Annual Legumes In A Mediterranean Environment, E. Campiglia, F. Caporali, R. Mancinelli

IGC Proceedings (1997-2023)

Self-reseeding winter annual legumes (subclover and snail medic) have the potential to induce a significant shift towards a less energy-intensive and more environmentally friendly management in the modern and specialized cereal cropping systems. Nevertheless their use is practically unknown in mixed stands with winter cereals, where they can contribute to supply nitrogen and to reduce herbicides input. We conceived an alternative cropping system where an annual legume performs, respectively, as living mulch in a winter cereal (winter wheat), as a cover crop after reseeding and as dry mulch for the succeeding summer cereal (corn). Trials carried out at the Tuscia …

Legumes For Organic Cropping Systems, F. Caporali, R. Mancinelli, E. Campiglia

IGC Proceedings (1997-2023)

A field experiment which focuses on the yield performance of both durum wheat and sunflower included in a twoyear rotation between wheat/subterranean clover and sunflower was carried out in an organic farm in Central Italy. Three factors were included in the experiment according to a factorial design: a) two different previous crop sequences (four years of alfalfa, four years of annual crops); b) three fertilization levels (without and with animal manure incorporated at 15 or 40 cm depth); c) three durum wheat genotypes (Appulo, Arcangelo and Daunia cvs). The results obtained show that a previous alfalfa meadow allows the succeeding …

Recurrent Connectionist Models For Map Explanation In Bayesian Networks, Murad Assaggaf

Archived Theses and Dissertations

No abstract provided.

Effects Of Preservation With Pre-Fermented Green Juice (Fgj) On Fermentation Quality And Energy And Nitrogen Utilization Of Round-Baled Alfalfa Silage By Dairy Cattle, Li-Man Cao, Yoshitaka Deguchi, M. Mizutani, M. Goto, Y. Yamamoto, S. Urakawa, Y. Yamada, M. Matsui, T. Masuko, Yasuhiro Kawamoto

IGC Proceedings (1997-2023)

This study was conducted to examine the effects of pre-fermented green juice (FGJ) of epiphytic lactic acid bacteria (LAB) on the fermentation quality and animal performance of round-baled alfalfa silage (Medicago stativa L.,cv. Dupuits). Ensiling treatments of wilting and FGJ additives (WFGJ) and direct-cut and FGJ additives (DFGJ) improved the fermentation quality of alfalfa silage more than that of wilting (W). Enhanced fermentation in the WFGJ and DFGJ silage was also associated with the increases of energy and nitrogen utilization of the silage by dry Holstein dairy cattle, as fed on diets formulated with alfalfa silage, oat …

Effect Of Application Of Farmyard Manure To Ley On Forage Yield And Quality Of Grass Silage, T. M. Pauly, L. Rodhe

IGC Proceedings (1997-2023)

A two-year field trial was performed on ley near Uppsala, Sweden, with the following treatments (3 plots/treatment): A, no manure or fertiliser; B, manure applied in Oct.; C, manure applied in Oct. followed by rolling plots in May; D, manure applied in May; E, mineral fertiliser only. Apart from cattle manure, plots allocated to treatments B, C and D received the same amount of mineral nutrients as treatment E. The objective of this experiment was to get an indication of how different times of manure application (before or after the growth period) affected forage yields and the quality of the …

The Effects Of Cellulase On Cell Wall Structure And The Rumen Digestion Of Alfalfa Silage, T. Ishida, A. Aisan, K. Tomiyama, T. Watanabe, H. Terui, E. No, K. Ataku

IGC Proceedings (1997-2023)

First- and second-cut alfalfa (Medicago sativa) was ensiled with no additive, microbial (Lactobacillus casei) inoculant, cellulase derived from Acremonium celluloytics Y-94, co-addition of inoculant and cellulase, and formic acid. The resultant silages were digested in the rumen of a dairy cow. The alfalfa and the silages were then examined with scanning electron microscope (SEM) and their chemical characteristics analyzed to evaluate the effects of cellulase on the quality of alfalfa silage and its cell wall structure.

The addition of cellulase lend to both a greater loss of parenchymal tissue and decrease in digestibility during rumen degradation …

Evidence For Quasi-Periodic Oscillations In The Recurrent Emission From Magnetars And Their Implications On The Neutron Star Properties And Equation Of State, Ahmed Monzer El Mezeini

Archived Theses and Dissertations

In this thesis, we present an analysis of highly magnetized neutron stars â magnetarsâ , in search for high frequency oscillations in the recurrent emission from the soft gamma repeater SGR 1806-20, and we discuss the physical interpretation of these oscillations and its implications on the neutron star properties and structure. We present evidence for Quasi-Periodic Oscillations (QPOs) in the recurrent outburst activity from the soft gamma repeater SGR 1806-20 using Rossi X-ray Timing Explorer (RXTE) observations. By searching a large sample of bursts for timing signals at the frequencies of the QPOs discovered in the 2004 December 27 giant …

Implications From Uranium-Series Disequilibria In A Bi-Lithologic Melt With Varying Lithospheric Caps, Juliet Messer

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Both spreading rates and local magma supply to mid-ocean ridges affect crustal construction styles and ridge morphology, alternately leading to either asymmetrical (detachment faulting) or symmetrical faulting styles. Uranium-series isotopic disequilibria in mid-ocean ridge basalts (MORB) may provide insight into how melt supply variations relate to ridges’ accretion styles, a processes that are not well understood. I use Reactive Porous Flow (RPF) equilibrium and disequilibrium modeling to simulate U-series disequilibria at mid-ocean ridge (MOR) generated by melt supply variations at both asymmetrical and symmetrical ridge segments.

Guided by my modeling, I predict that enhanced melt contributions from enriched pyroxenitic mantle …

Biostratigraphy Of Paleogene Diatom Assemblages In The Southern Ocean, Angela Kaup

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

The record of siliceous microfossil sedimentation in the high latitude South Atlantic Ocean has great potential for dating seismic and stratigraphic units. Over the last several decades, scientists have documented diatom biostratigraphic record from sediment cores and drill cores in the Falkland Plateau and Maurice Ewing Bank region, as well as other areas of the Southern Ocean, and a robust chronostratigraphic framework is available for Neogene sequences. Given the complicated nature of ocean bathymetry, tectonic plate motion (vertical and lateral), and ocean current flow, the sedimentological evolution of this oceanic region is not well understood. Sampling sediment cores at high …

Soil Microbial Community Dynamics In Response To Prescribed Extreme Fires Following Juniperus Virginiana Invasion In The Loess Canyons Of Nebraska, Julie A. Fowler

School of Natural Resources: Dissertations, Theses, and Student Research

In Nebraska and other regions of the Great Plains, the conifer Juniperus virginiana (eastern redcedar) is converting grasslands to dense woodlands. This is driven by the interacting drivers of fire suppression, altered grazing regimes, climate change and other anthropogenic factors, impacting the provisioning of ecosystem services. This vegetation state transition modifies water resource regulation and biogeochemical cycles leading to altered edaphic properties including soil microbial community composition. To restore these grasslands and control J. virginiana spread, prescribed extreme burns are implemented as a management tool through local prescribed burn associations. We hypothesized that the alternative state transition to dense J. …