Digital Commons Network^™

Study Of Reactive Distillation Equipment For Eterification Process, Abbos Elmanov, Abdulaziz Bakhtiyorov, Adham Norkobilov, Olimjon Maksudov, Zarif Oripov

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of this work is to study the chemical technological processes for eterification processes, and the reactive distillation unit, which carries out the reaction and separation process in one device, was chosen as the object of research. А reаctive distillаtion system is exаmined to produce for the production of Ethyl Acetate (EtAc) viа eterificаtion of acetic acid (HAc) with ethаnol. Optimizаtion methods using sensitivity analysis аre аlso conducted. Cаlculаtion of vаpor liquid equilibrium of the mixture system is done using UNIFАC model. Heat integration from the distillate stream of the column to the acid feed stream and from bottom …

Modeling And Performance Analysis Of Solid Oxide Fuel Cell, Mariya Pecherskaya, Khakimjan Butanov, Suhrob A. Ibodullaev, Olim Ruzimuradov, Shavkat Mamatkulov

CHEMISTRY AND CHEMICAL ENGINEERING

A three-dimensional numerical model of the system configurations of various types of solid oxide fuel cells (SOFCs) is used and the effect of parameters on SOFC performance is numerically investigated using COMSOL Multiphysics. The effect of parameters such as support layer thickness, operating temperature, and electrode porosity are shown in the polarization and power curves for each model. The results of the study showed the advantages of the anode-supported SOFC compared to cathode- and electrolyte-supported SOFC.

Theoretical calculations demonstrate the highest output power density in the anode-supported SOFC at 900 ℃, and reach a value of 0.585 W cm^{-2 …}

Alkynylation Of Benzaldehyde And Its R-Substituted Derivatives Based On Lithium Phenylacetylenide, Sanat B. Samatov, Odiljon E. Ziyadullayev, Abduvakhab Ikramov

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of this research work is for the first time the synthesis of the corresponding acetylene alcohols based on the alkynylation reaction of isolated benzaldehyde and its R-substituted derivatives in the BuLi/TGF system. The study proposed the reaction stages for the synthesis of acetylene alcohols in the selected BuLi/TGF system, the influence of factors influencing the process, including temperature, reaction duration and nature selected solvents. The structure of the synthesized acetylene alcohols was confirmed by modern methods of physicochemical analysis (¹H NMR, ¹³C NMR). In addition, the effect of substituents in benzaldehyde and its R-substituted derivatives …

Numerical Calculation Of The Flame Spreading Over A Methane Hydrate Surface, Otabek Nigmatov, Oksana Ismailova

CHEMISTRY AND CHEMICAL ENGINEERING

The Methane Hydrate is expected as an energy source and is being as a medium distance transport means of natural gas alternative of LNG (Liquefied Natural Gas). During the natural gas transportation, fire accidents are concerned. In the present study, the flame spreading over a methane hydrate surface has been studied numerically as a function of hydrate surface temperature, T_s. When T_s = 173 K (-100℃), lower than the dissociation temperature (T_d = 183 K (-90℃)), the flame spreading speed is around 6.5 mm/s, while the flame spreading speed at T_s = 193 K (-80℃), …

Dft Study Of Quantum Chemical Parameters Of 4-Amino-2-Mercaptobenzimidazole And Their Tautomeric Forms, Dilnoza Rahmonova, Alisher Eshimbetov, Lobar Gapurova, Zuhra Ch. Kadirova, Shakhnoza Kadirova

CHEMISTRY AND CHEMICAL ENGINEERING

Coordination competing donor centers, electronic and geometric structures of the 4-amino-2-mercaptobenzimidazole ligand molecule were studied using quantum chemical calculation by the DFT / 6-31G method (d, p). It was shown that during the formation of the metal complex, the ligand is coordinated through the localized nitrogen atom of the imidazole ring. In this study, the total energies (Etot) of 4-amino-2-mercaptobenzimidazole (1) and its tautomeric forms (2 and 3) were calculated. And also, the energies of boundary molecular orbitals, the energy gap between boundary MOs (ΔE) and the distribution of the total charge on atoms and boundary orbitals were determined. In …

The Effect Of Hydrogen Peroxide And Potassium Amylxanthate On The Surface Properties Of Chalcocite And Enargite, Berdakh T. Daniyarov, Hajime Miki, Daminbek A. Ziyatov, Shahlo Daminova

CHEMISTRY AND CHEMICAL ENGINEERING

The effect on the surface properties and floatability of chalcocite and enargite after oxidative treatment with hydrogen peroxide (H₂O₂) in the presence and absence of potassium amylxanthate (PAX) as a collector was studied. In this research, flotation tests were carried out on mixed and individual minerals. Oxidative treatment with hydrogen peroxide had a negative effect on the floatability of chalcocite and enargite. PAX adsorption analysis shows that enargite adsorbs PAX faster than chalcocite. Moreover, Fourier transform infrared spectroscopy analysis shows that PAX was adsorbed in the form of copper amylxanthate on chalcocite and enargite surfaces. In …

Influence Of The Amount Of Monoethanolamine On The Physicochemical Properties Of Aminolysis Products, Soxibjon A. Egamberdiyev, Muzaffar G. Alimukhamedov, Juraev Asror, Ravshan Adilov

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of this paper is to investigate the process of aminolysis of secondary polyethylene terephthalate with monoethanolamine at low ratio. The effect of the amount of monoethanolamine on the physical and chemical properties of the aminolysis product of secondary polyethylene terephthalate was studied. With an increase of 1-4 moles of monoethanolamine obtained for synthesis (without the presence of a catalyst), it was observed that the number of amines in the aminolysis product increased from 324 to 503 mgKON/g, and the number of hydroxyls increased from 298 to 491 mgKON/g. The structure of the resulting bis(2-hydroxyethylene)terephthalamide was studied using IR …

Study Of The Structure Of Glass Ionomer Cements Developed Based On Glass System Sio2-Al2o3-Cao-Zno-P2o5-Caf2, Tatyana O. Nam, Mastura X. Aripova, Ripsime V. Mkrtchyan

CHEMISTRY AND CHEMICAL ENGINEERING

The goal was to study the structure of glass ionomer cements (GIC) developed on the basis of glasses of the SiO₂-Al₂O₃-CaO-ZnO-P₂O5-CaF₂ system. Glass powders with sizes less than 50 μm were sealed with a 40% solution of polyacrylic acid and after 72 hours, electron microscopic examination was carried out on a JSM-IT200 scanning microscope (JEOL, Japan). All samples demonstrate a cellular structure consisting of glass particles surrounded by glass elements that have entered into an acid-ion interaction with polyacrylic acid in a polymer matrix. GIC-4 and GIC-6 show the most …

Impact Of Sulfurization On Sputtered Bivo4 Thin Films, Shukur P. Gofurov, Dilbar T. Bozorova, Zuhra Ch, Kadirova, Oksana Ismailova

CHEMISTRY AND CHEMICAL ENGINEERING

The sulfurization method has been used to decrease the band gap of the BiVO₄ structure, reduce the recombination of electrons and holes, and increase the photoelectrochemical performance of this material. It has been observed that incorporation of sulfur into stoichiometric and V_rich BiVO₄ is variously affected changing of properties of the structure. Sulfurization can modify V_rich BiVO₄ structure rather than stoichiometric BiVO₄.

Development Of Clinker And Portland Cement Composition Based On Surkhondaryo Raw Materials, Salohiddin Ramazanov, Abdumalik Nabiyev, Mastura Aripova

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of this research work is to develop clinker and Portland cement compositions based on Surkhandarya raw materials for the planned construction of a cement plant, as well as to study their physical and chemical properties. The compositions of clinkers, including limestone, clay from the Yolgizbulok deposit and slag from the Almalyk mining and metallurgical plant, were studied. The optimal clinker composition was selected, on the basis of which Portland cement was obtained. The optimal amount of gypsum addition was determined to achieve a cement stone strength of 43,5 MPa. The developed clinker composition will provide the planned enterprise …

Antibacterial Cerium-Containing Glazes For Ceramic Tiles, Ivan Levitskiy, Mastura Aripova, Mihail Dyadenko, Dar’Ya Kucherova, Artem Golub

CHEMISTRY AND CHEMICAL ENGINEERING

The results of research on the production of semi-fritted cerium-containing glazes used for ceramic tiles are presented.

A multicomponent raw material mixture based on dolomite, cerium dioxide CeO₂, aluminosilicate multicalcium frit and permanent components including feldspar, alumina and clay components (kaolin and refractory clay) is used to produce glazes.

The characteristics of the obtained coatings were studied: appearance, technological and physico-chemical properties, including antibacterial properties in relation to the strains of Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538. The influence of temperature parameters on the formation of glaze coatings, as well as their structure and phase …

How Elementary School Principals Successfully Led Through The Turbulence Of The Covid-19 Crisis, Juan Chavez

Dissertations

Purpose: This phenomenological study aimed to discover and describe behaviors elementary school principals practiced while leading their schools through the turbulent times of COVID-19 using the leadership attributes of personal temperament, concern for collective interest, resilience, and moral purpose, as perceived by elementary school teachers. Methodology: This qualitative study used a phenomenological research design. Data were collected from interviews 12 with elementary school teachers in Monterey County to discover and describe behaviors their principals practiced in leading their schools through the turbulent times of COVID-19. Findings: The study revealed 16 themes related to behaviors elementary school principals used related to …

Rising Cases Of Drug-Induced Pulmonary Fibrosis: Analysis Of The Food And Drug Administration Adverse Event Reporting System (Faers) Database, 2000–2022, Kenneth L. Mccall, Kelsey R. Hennig, Zachary T. Abe, Danielle N. Dattler, Karyssa L. Hurd, Sophie L. Portnoy, Zoey J. Zagoria

Pharmacy Faculty Scholarship

Purpose Pulmonary fibrosis (PF) is a severe, progressive disease, which may be caused by exposure to certain medications. Methods We queried the U.S. FDA Adverse Event Reporting System (FAERS) from 2000 to 2022, using the search terms “pulmonary fibrosis” and “idiopathic pulmonary fibrosis” and excluded reports with patients under the age of 18 years, and patients with unknown sex or age. Reports were sorted by generic drug names, counted, and plotted over time using a best-fit trendline based on an exponential function. Results From 2000 to 2022, there were 24 095 935 adverse drug events reported in FAERS, of which …

Bridging The Digital Divide: Innovative Uses Of Qr Codes And Nfc In The Artistic Realm, Piper Hutson, James Hutson

Faculty Scholarship

In the rapidly evolving digital age, artists and creatives are increasingly leveraging QR codes and Near Field Communication (NFC) technologies to redefine the boundaries between the physical and digital worlds. This article explores the diverse and inventive applications of QR codes and NFC in art installations, augmented reality experiences, interactive storytelling, performance art, and marketing campaigns. By incorporating these technologies, artists may create interactive, immersive, and personalized experiences which engage audiences in novel ways. Additionally, the article delves into the technological advancements enabling these innovative applications, including location-based personalization, machine learning, augmented reality, and the seamless interactions facilitated by NFC …

“Somebody’S Gotta Try And Go Forward”: Musical Identity And The (Re)Construction Of Authenticity In Hawai‘I And Mongolia, Heather E. Cook

Anthropology Honors Projects

Based on thirty-seven interviews with musicians and performers in Mongolia and Hawaiʻi, this ethnography explores the complex relationships between nationalism, cultural imperialism, hybridity, and conceptions of authenticity in the colonial context through the lens of folk music. Engaging with theories of practice and postcolonialism, I argue that within contemporary contexts of globalization and cultural imperialism, musicians and performers have formed a sense of musical and cultural identity dependent on nationalist conceptions of tradition, yet the notion of cultural authenticity no longer depends on the absence of Western influence, but on the cultural sovereignty of the artist and the agency of …

Breaking The Mold: Voters’ Perceptions Of Femininity In Campaigns, Margaret E. Ulrich

Political Science Honors Projects

I designed a two pronged study to explore the relationship between femininity in candidate self- presentation and voter perception. First, I presented a sample of U.S. voters a series of images featuring either feminine or non-feminine female professionals. I then selected two images from this study to design two faux print political advertisements, one featuring a feminine candidate and one featuring a non-feminine candidate to establish a treatment and control condition featuring similarly “attractive” candidates. Then, I showed a quasi-representative sample of 540 potential U.S. voters one of these faux political advertisements and asked a series of questions regarding the …

Exploring The Potential Of Soy-Based Materials: Sustainable Textile Design And Apparel Production, Kasandra Wright

Bumpers Research Symposium

The textile industry is a significant contributor to environmental degradation, particularly through water, energy, and chemical pollution. Soy-based materials offer a sustainable alternative due to their biodegradability, renewability, and reduced water and chemical usage compared to traditional textiles. However, the potential of soy materials in fashion design remains largely unexplored. This project aimed to investigate the feasibility and aesthetic potential of soy-based materials in fashion design, with a focus on creating sustainable soy textiles using batik techniques.

The completed soy textile design showcased a moth motif crafted through batik techniques. Vibrant colors and a distinctive texture were achieved through wax …

Geriatric Psychology: Using Program And Curriculum Development As A Method Of Synthesizing And Assessing Best Practices In Improving Psychological Outcomes For Senior Populations, Sofia J. Onuscheck

Psychology Honors Projects

This project on geriatric psychology and improving psychological outcomes in elderly populations uses curriculum/program development to synthesize best practices. Chapter One reviews literature concerning and informing intergenerational friendships, concluding that intergenerational friendships present a novel opportunity to ease some social/cognitive concerns around aging. A program facilitating intergenerational relationships within communities is proposed. Chapter Two conducts a broader study of geriatric psychology in order to develop a 14 week course curriculum that provides an introduction to the field and asks students to apply literature-informed methods to more fully understand and connect with this growing population and their unique needs.

Russian Verbs Of Sound’S Web-Scraping Results From The A.A. Zalizniak Grammatical Dictionary And The Russian National Corpus. Multi-Dimensional Scaling Techniques And Visualization Strategies, John Simmons, Irina V. Ivliyeva

Graduate Student Research & Creative Works

This project aims to enhance web extraction techniques pertaining to a specific lexical-semantic group of Russian verbs of sounds, which undergo semantic modifications at the word-formation level (affixation). Additionally, it seeks to organize search results in a manner conducive to linguistic research using Multi-Dimensional Scaling (MDS) techniques and novel visualization strategies.

The primary objective in this phase of the research was to gather, consolidate, analyze, and present a comprehensive index of all forms of verbs of sound sourced from the A.A. Zalizniak Grammatical Dictionary of the Russian language, hyperlink each verbal form in this index with the Russian National Corpus …

The Trial Of Abraham And The Trembling Of The Audience: Rereading The Aqedah, Michael Zhaohan Tang

Classical Mediterranean and Middle East Honors Projects

This thesis reexamines the Aqedah narrative from Genesis 22:1–19, focusing on the conveyance of emotions and the portrayal of characters in a story that lacks explicit descriptions of thoughts and feelings. Approaching the text through a literary and narratological lens, I propose that through phraseological techniques like diction and parataxis and compositional strategies such as allusion and juxtaposition, the text captures the psychological depth of biblical characters, thereby enhancing its emotional impact on the audience. I dissect the narrative into eight scenes and within each scene, I conduct close readings to identify and analyze subtle lexical choices and rhetorical devices. …

Partisan Perspectives On Inflation: Exploring Bias In Economic Expectations, Anna Durall

Economics Honors Projects

Inflation expectations are important determinants of future inflation and individual consumer behavior. Recent attention has been devoted to individual-level heterogeneity in inflation expectations. I consider political partisanship as a source of heterogeneity and question whether expectations are biased by partisanship. I find that they are, i.e., that individuals from the president's political party expect lower inflation relative to members of the opposing party (this difference is statistically insignificant during the Bush presidency), and that this result cannot be explained by additional sources of heterogeneity. I also examine whether belonging to the president's political party affects the rationality of expectations and …

Improvement Of Attitudes Towards People With Disabilities Through Education And Contact, Samuel L. Ash

Psychology Honors Projects

Two studies were conducted to investigate the impact of educational interventions and contact with individuals with disabilities on explicit and implicit attitudes towards people with disabilities. In study 1, 63 participants watched one of two videos, one on the social model of disability (experimental condition) and the other about wheelchair soccer (control condition). Participants also completed measures of contact, explicit, and implicit attitudes toward people with disabilities. Results from regression analyses indicated no significant effects of the videos or reported contact on either explicit or implicit attitudes, challenging previous findings that suggested positive effects of contact and education on explicit …

Developing A Novel Assay For Quantifying Allelopathy Tolerance In Soybeans To Pennycress Glucosinolates In A Controlled Environment, A. Jonaus

Biology Honors Projects

In a pennycress (Thlaspi arvense L.) and soybean (Glycine max L.) relay-cropping system, one concern for farmers is the effects of pennycress allelochemicals on soybean growth and yield. Pennycress root exudates are known to contain sinigrin, a glucosinolate which hydrolyzes to form the harmful compound allyl isothiocyanate (AITC). In addition to serving as defense against herbivory, glucosinolates are also known to have allelopathic effects on surrounding plants by possibly affecting traits like germination, biomass accumulation, nutrient uptake, mycorrhizal symbioses, and nitrogen fixation. This is not ideal in a relay cropping system, where the presence of pennycress can decrease soybean yields …

The Utah Statesman, April 29, 2024, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Voices Of American Women: A Survey Of Vocal Music From 1900 - 1950, Kathryn N. Linzmaier

Student Theses

For centuries, female composers have struggled for recognition in a male-dominated field, and those who did publish were typically in privileged positions. However, in recent years, more efforts have been put forth to uncover these unsung heroines; anthologies of women's music have been curated and analyzed and continue to bring awareness to the works of these amazing women. These are necessary contributions, but there is still a void to be filled, particularly regarding women from the United States in the early twentieth century. Therefore, this research provides historical, musical, lyrical, and pedagogical information on the solo vocal music of multiple …

Predatory Inclusion In Higher Education: Labor And Financial Exploitation At A Predominantly White Institution In The Era Of Neoliberal Multiculturalism, Maia N. Pedrosa

Sociology Honors Projects

In the summer of 2020, racial justice movements that emerged in response to the murder of George Floyd at the hands of Minneapolis police officer Derek Chauvin passionately decried the systems and institutions at fault and complicit in still perpetuating racial discrimination towards Black people, as well as Indigenous and other People of Color (BIPOC). As a response to these racial justice demands, college institutions pushed for diversity in their student body and across college affairs in order to appear like they were effectively responding to student demands. However, this fight against racial inequality and inequity began long before during …

A Veneer Of Democracy: How El-Zu’Ama Dominate Lebanon’S Political System, Sami Banat

Political Science Honors Projects

As Lebanon has endured a never-ending cycle of crises for decades, scholars have sought explanations via the country’s intense sectarian system, and have investigated its origins extensively. However, this search has neglected the question of sectarianism’s permeance and maintenance. This paper will focus on the latter, and argues that the sectarian system is sustained by a sectarian elite class, known as el-zu’ama, via their own cults of personality enabling them to maintain control of their sects. This paper will examine pre-statehood history, the civil war, post-war reconstruction, and finally, modern failed challenges to the system to illustrate this thesis.

Farm Electricity System Simulator (Fess): A Platform For Simulating Electricity Utilisation On Dairy Farms, F. Buckley, J. Upton, R. Prendergast, L. Shalloo, Michael D. Murphy

Publications

The objective of this paper was to define, validate and demonstrate a model capable of accurately simulating dairy farm electricity consumption across varying herd and parlour sizes, to facilitate research investigating renewable energy systems (RES) and demand side management (DSM). The Farm Electricity System Simulator (FESS) was developed using grey-box modelling techniques utilizing empirical data for parameter tuning. Empirical data were gathered from nine spring calving, pasture based dairy farms located in the Republic of Ireland. A k-means clustering analysis was conducted, separating the farms into three, near homogenous groups, from which representative farms were selected. FESS was trained using …

Ethos Alumna Comes Back To Share Story With Current Students, University Of Dayton

Blog: The Dayton Engineer

Dr. Chris Vehar Jutte ‘02, now a contractor with NASA, recently came back to her alma mater this spring to discuss engineering as a vocation for the common good. She wants to help students realize their purpose as engineers.

2023-2024 Master Of Music Recital - Jafet Diaz (Trumpet), Jafet Diaz, Yu-Hsuan Feng

Master of Music Recitals

No abstract provided.