Digital Commons Network^™

Plithogenic Statistical Analysis Of Teaching Performance In Student Autonomous Learning, Felipe Aguirre Chávez, Rolando Oscco Solorzano, Freddy Alejandro Soto Zedano, María Eva Oscco Solorzano, Richard Santiago Quivio Cuno, Delio Merma Saico

Neutrosophic Sets and Systems

In the current educational context, the effectiveness of teaching performance in blended environments has acquired significant relevance. The present research focused on evaluating the relationship between professional teaching competencies and the achievement of student competencies in the blended context. To this end, perceptions of teacher performance and instrumental, interpersonal, and systemic competencies were evaluated using plithogenic statistics. Among the results, they indicated that the student's perception of teaching performance in relation to classroom management and professional development was positive. However, areas of improvement were identified in interpersonal and technical skills. Observations suggest that teacher performance significantly influences the achievement of …

Assessing The Need For A Feminist Foreign Policy In Ecuador Through A Sentiment Analysis Based On Neutroalgebra, Daniela Cecilia Márquez Carriel, Luis Oña Garces, Arnaldo Vergara Romero, Fidel Márquez Sanchez

Neutrosophic Sets and Systems

This paper examines the potential for a feminist foreign policy in Ecuador, a concept gaining global attention but still new in local debates. While Ecuador's foreign policy has historically focused on economic and strategic interests, the rising influence of feminist movements is prompting discussions about integrating gender perspectives into diplomacy, trade, and international aid. Using neutrosophic sentiment analysis, the study finds divided opinions: while "Gender Equality" and "Human Rights" receive stable support, the "Economic Impact" variable shows significant uncertainty. Some view a feminist foreign policy as a way to enhance Ecuador's global standing and gender equity, while others are skeptical …

Integrating Neutrosophic Theory Into Regression Models For Enhanced Prediction Of Uncertainty In Social Innovation Ecosystems, Juan Carlos López Gutiérrez, Isarelis Pérez Ones, Jesús Estupiñán Ricardo, Jean Pierre Ramos Carpio

Neutrosophic Sets and Systems

This paper focuses on a crucial issue in data analysis: the incorporation of neutrosophic theory into regression prediction to accurately characterize and depict uncertainty in the social innovation ecosystem. The study centers on the limitations of conventional regression methods in modeling intricate and uncertain events related to social innovation, a subject of growing importance in a dynamic global landscape. This paper aims to address the gap in the literature by utilizing neutrosophic theory to provide a more comprehensive and dynamic representation of innovation processes, which are characterized by indeterminacy and ambiguity. The methodology employed for this study involves including neutrosophic …

Enhancing The Codification Of Crimes Against Humanity: A Neutrosophic And Analytical Approach To International Legal Frameworks, Marcia Esther España Heredia, Jorge Washigton Soxo Andachi, Nemis García Arias, Karina Pérez Teruel

Neutrosophic Sets and Systems

The present paper investigates the process of codifying crimes against humanity, with a specific focus on the difficulties encountered in achieving regulatory consistency and precision within international legal traditions. Notwithstanding the implementation of the Rome Statute and the endeavors of the International Law Commission (ILC), there are still deficiencies in the codification, namely in the areas of preventing and punishing these offenses. By employing the Neutrosophic Analytic Hierarchy Process (NAHP), Delphi method, and Neutrosophic Cognitive Maps (NCM), this study reveals key elements that impact the codification process. These elements include the necessity for a distinct convention and the sufficiency of …

Determining The Relationship Between Interculturality And Bilingualism In Bilingual Teaching In Peru Based On Plithogenic Statistics, Rafael Pinedo Coral, Aniceto Elías Aguilar Polo, Juan Ernesto Ríos Ángeles, Edgar Ricardo Yauri Rivera, Janett Karina Vásquez Pérez, Liliana Huaranga Rivera, Roberth Lozano Tacuri Toribio, Miriam Esther Campos Llana

Neutrosophic Sets and Systems

The development of this research was propitiated as its main goal to determine the level of relationship that exists between interculturality and bilingualism in bilingual teachers of regular basic education in the rural area of Callería, Ucayali, Peru, during 2023. The study was developed through simple random sampling, in the population that is made up of 581 bilingual teachers. The sample comprises 174 of these teachers, to whom two questionnaires were applied as data collection instruments prepared from the survey technique; thus concluding that there is a direct and significant relationship between interculturality and bilingualism. We determined that the use …

Student Perceptions Of Integrated Stem Education In A High School Geometry Class, Alyssa Noland

Dissertations

Integrated Science Technology Engineering Mathematics (STEM) education provides students with opportunities to solve integrated real-world problems. Integrated STEM instruction aims to develop 21^st-century skills in students and promote interest in STEM subjects through authentic real-world tasks. Student perceptions can help educators and administrators to understand the benefits and constraints of integrated STEM instruction. This qualitative case study was designed to understand student perceptions of integrated STEM instruction and student perceptions of the value or applications of mathematics. The situated STEM learning and social constructivism theoretical frameworks guided the design of the lessons and methods of the study. High …

Radio Propagation Through Density Irregularities In The Auroral Ionosphere, Pralay Raj Vaggu

Doctoral Dissertations and Master's Theses

A radio wave propagating through a structured or turbulent ionosphere undergoes multiple effects, such as refraction, diffraction, etc., that distort the incident radio wave by inducing phase and amplitude fluctuations. These fluctuations are called ionospheric scintillation. Scintillation effects can be detrimental to Global Navigation Satellite Systems (GNSS) such as Global Positioning System (GPS), but the observed effects can be used as a tool to study the underlying plasma process that causes scintillation. Scintillation is commonly seen in equatorial and high-latitude regions. This study centers around the scintillation and its causative plasma processes that dominantly happen in the high-latitude ionosphere …

Dynamic Metabolic Flux Analysis Amidst Data Variability: Sphingolipid Biosynthesis Case Study In Arabidopsis Thaliana Cell Cultures, Abraham Boluwatife Osinuga

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

Sphingolipids are pivotal for plant development and stress responses. Growing interest has been directed towards fully comprehending the regulatory mechanisms of the sphingolipid pathway. In this study, we explore its de novo biosynthesis and homeostasis in Arabidopsis thaliana cell cultures, shedding light on fundamental metabolic mechanisms. Employing ¹⁵N isotope labeling and quantitative dynamic modeling approach, we obtained data with notable variations and developed a regularized and constraint-based Dynamic Metabolic Flux Analysis (r-DMFA) framework to predict metabolic shifts due to enzymatic changes. Our analysis revealed key enzymes such as sphingoid-base hydroxylase (SBH) and long-chain-base kinase …

Torus Surgery, Fibrations, Multisections, And Spun 4-Manifolds, Nicholas Paul Meyer

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

A compact n-manifold X is fibered if it is a fiber bundle where the fiber F and base space B are manifolds. Fibered manifolds are particularly nice, as they are essentially classified by their monodromy maps. Two common examples of 4-dimensional fibered manifolds are surface bundles over surfaces and 3-manifold bundles over the circle.

The main focus of this dissertation is to investigate fibered 4-manifolds whose boundaries are the 3-torus and how these manifolds glue together to give new closed, fibered 4-manifolds. In particular, suppose W is diffeomorphic to S¹ × E_Y (K) where Y …

A Case Study Of Mathematical Instructional Leadership, Theresa Haack

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

This dissertation looks at the impact of instructional leadership in mathematics teaching on teachers at various stages in their careers. Using a case study methodology, the researcher explores the nuanced needs and effective strategies for beginning, mid-career, and established teachers. Peer instructional leaders provided data that involved a mix of qualitative methods, including surveys, interviews, and questionnaires, targeting five assistant principals selected randomly from diverse school environments. The study identifies common themes and differences in instructional approaches, highlighting how strategies vary and overlap across different career stages. Analysis gives insights into the practical application of leadership in educational settings, emphasizing …

A Study Of Electron- And Photon-Induced Dissociative Electron Attachment To Molecules And Within Anion-Molecule Clusters, Mahmudul Hasan

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Dissociative electron attachment (DEA) is a resonant process in which a molecule captures a low-energy electron, forming a transient negative ion (TNI). Subsequently, this unstable TNI fragments into a stable anion and one or more neutral fragments. DEA is crucial in various phenomena, ranging from atmospheric and radiation chemistry to processes occurring in plasmas, and is particularly significant in the context of radiation-induced damage to biological molecules. This study uses different experimental methods to better understand the fragmentation in molecular anions forming through dissociative photoexcitation and electron attachment. We have developed an experimental apparatus for dissociative photoexcitation studies. This apparatus …

Business Model Choice For Heavy Equipment Manufacturer, Philippe Blaettchen, Niyazi Taneri, Sameer Hasija

Research Collection Lee Kong Chian School Of Business

Technological advances enable new business models for heavy equipment manufacturers wherein customers access equipment without ownership. We seek to understand the profitability and environmental performance of different emerging business models in light of salient economic and operational factors. We develop a game-theoretic model to identify the optimal choice between a traditional ownership-based business model and two access-based models: servicization and peer-to-peer sharing. After-sales services, equipment characteristics, usage environments, and fuel prices affect this choice. We also provide a novel framework to analyze business models’ environmental impact, which incorporates trade-offs between economic value and environmental costs and shows that all models …

Conductometric And Computational Study Of Chloramphenicol At Different Solvents And Temperatures, Amel G. Abed

Baghdad Science Journal

In the present work, the electrical conductivity of chloramphenicol was measured in water and methanol at different temperature degrees 293-313 K. The parameters of conductivity equivalent conductance at infinite dilution ( Λ0), the association constant (KA) and distance parameter (R) were all recorded by using Lee-Wheaton equation and the thermodynamic parameters (ΔH, ΔG, and ΔS) were calculated as well. The behavior of a compound can be predicted through computational calculations; taking 2,2-dichloro-N-[(1R,2S)-1,3-dihydroxy-1-(4-nitrophenyl) propan-2-yl] acetamide, for example. There is an abundance of theoretical information available about how this compound behaves in different solvents, such as water and methanol. The secret lies …

Employing Novel Ranking Function For Solving Fully Fuzzy Fractional Linear Programming Problems, Israa H. Hasan, Iden H. Al Kanani

Baghdad Science Journal

Fuzzy programming is especially useful in cases where the coefficients are ambiguous. Because of this feature, in recent years, numerous techniques have emerged for addressing uncertainty. This paper proposes a novel ranking function technique with variables of type decagonal fuzzy numbers for solving fully fuzzy fractional linear programming (FFFLP) problems. This technique is dependent on introducing a new membership function for a decagonal fuzzy number and using a fully fuzzy simplex method. After converting the FFFLP problem to the fully fuzzy linear programming (FFLP) problem by a complementary method, then solved with the fully fuzzy simplex tables, in which all …

Oscillation Of The Impulsive Hematopoiesis Model With Positive And Negative Coefficients, Iman Sabeeh Hadeed, Hussain Ali Mohamad

Baghdad Science Journal

In this paper, the problem of oscillating solutions for an impulsive hematopoiesis model with positive and negative coefficients is investigated. There are several evolutionary processes, which frequently encounter dramatic shifts at specific times and are sensitive to short-term perturbations. As a result, we construct several oscillation criteria that are either brand-new or enhance many of recent findings in the literature. We also give illustrations of how impulsiveness affects the oscillating solutions of the hematopoiesis model.

Hopf Bifurcation Of Three-Dimensional Quadratic Jerk System, Tahsin I. Rasul, Rizgar H. Salih

Baghdad Science Journal

This paper is devoted to investigating the Hopf bifurcation of a three-dimensional quadratic jerk system. The stability of the singular points, the appearance of the Hopf bifurcation and the limit cycles of the system are studied. Additionally, the Liapunov quantities technique is used to study the cyclicity of the system and find how many limit cycles can be bifurcated from the Hopf points. Due to the computational load required for computing Liapunov quantities, some parameters are fixed. Currently, the analysis shows that three limit cycles can be bifurcated from the Hopf points. The results presented in this study are verified …

Quantifying The Return Of Security Investments For Technology Startups, Mohamed Noordin Yusuff Marican, Siti Hajar Othman, Ali Selamat, Shukor Abd Razak

Baghdad Science Journal

Technology startups are critical to the advancement of digital initiatives in many countries undergoing smart nation agenda. Technology startups are thus vendors and suppliers of services to large organizations such as the government sector, multi-national corporations and financial institutions. As such, startups are fast becoming attack vectors for malicious perpetrators to gain entry via backdoors to large organizations. However, startups remain prudent in their cyber security spending as their north star is revenue generation by delivering their services and minimum viable product (MVP) to their customers. This study proposes an enhanced Return on Security Investment (ROSI) which helps technology startups …

Semi-Analytical Solutions For Time-Fractional Fisher Equations Via New Iterative Method, Shivaji Ashok Tarate Tarate, A. P. Bhadane, S.B. Gaikwad, K.A. Kshirsagar

Baghdad Science Journal

An effective method for resolving non-linear partial differential equations with fractional derivatives is the New Sumudu Transform Iterative Method (NSTIM). It excels at solving difficult mathematical puzzles and offers insightful information about the behaviour of time-fractional Fisher equations. The method, which makes use of Caputo's sense derivatives and Wolfram in Mathematica, is reliable, simple to use, and gives a visual depiction of the solution. The analytical findings demonstrate that the proposed approach is effective and simple in generating precise solutions for the time-fractional Fisher equations. The results are made more reliable and applicable by including Caputo's sense derivatives. Mathematical modelling …

Check Out The Library, 2024 Summer Issue, Cal Poly Humboldt Library

Library Publications

Issue 18

Development Of A Large Format Additive Manufacturing System Based On An Off-The-Self Pellet Extruder, Aywan Das

Theses and Dissertations

Large Format Additive Manufacturing (LFAM), or Big Area Additive Manufacturing (BAAM), was introduced to resolve the limitations of the low deposition rate, low scalability, and therefore long print times, of traditional 3D printing methods when applied to the manufacturing of large structures and tooling. LFAM can be used to overcome the high conventional tooling costs of large structures. However, even with robotic setups, LFAM still mainly relies on quasi-planar, 2.5D printing strategies. This fails to reap the advantages of multi-axis printing, such as improved adhesion, reduced support material use, and the ability to create complex curved surfaces. In this research, …

Social Cognitive Factors That Contribute To Student Retention In A High School Engineering Pathway: A Longitudinal Study, Matthew Vargyas

Theses and Dissertations

This action research study investigated the cognitive factors that impacted students’ choice to continue within a high school engineering pathway, and the effect of multiple engineering courses on students’ engineering self-efficacy. Participants (N = 87) were students who completed three quantitative surveys throughout the engineering course(s) in which they were enrolled. Using the theoretical framework of Social Cognitive Career Theory, each survey measured student engineering self-efficacy, coping self-efficacy, outcome expectations, interests, persistence goals, external supports, and external barriers. Near the end of the course, students completed a qualitative, open-response questionnaire where they indicated their decision to continue in the engineering …

Design And Development Of A Direct Medium Voltage Solar Pv Resonant Inverter, Parthkumar Sureshkumar Bhuvela

Theses and Dissertations

In a grid-tied photovoltaic (PV) system connected to a medium voltage (MV) grid, an inverter is generally employed with a line frequency transformer (LFT) to connect to the grid. These LFTs are large in size and weight, exhibit high cost and losses. In recent studies, the LFTs replaced by are by (high frequency transformer) HFT embedded in DC-DC converters. These DC-DC converters are used to boost voltage levels and DC-AC inverters are employed for MV inversion. This leads to high frequency switching at MV which increases losses in inversion stage. In this study, a novel MV grid-connected solar PV inverter …

Multidimensional Simulation Of Cool Diffusion Flame, Ejaz Ahmed

Theses and Dissertations

Understanding the behavior of spherical cool diffusion flames in microgravity conditions is crucial for advancing combustion research. This knowledge has significant implications for both fundamental science and practical applications, such as spacecraft fire safety and the development of advanced, high-efficiency engines that benefit from low-temperature chemistry. Spherical cool diffusion flames are typically characterized by peak temperatures between 500 and 1000K and are often followed by the radiative extinction of a hot flame. Some low-temperature ignitions can sustain indefinitely at around 700K, leading to chain-branching pathways that produce intermediate species such as C2H4, H2O2, HO2, CH2O, CH3O, and HCO. In some …

Accelerating Numerical Modeling And Optimization Of Structural Mechanical Systems, Fatemeh Hashemian

Theses and Dissertations

This research proposal presents Bayesian optimization and reduced order modeling methods to accelerate numerical analysis and design of structure mechanical system. First, a holistic framework of Bayesian optimization (BO) based on parameterized numerical models and genetic algorithm-guided adaptive sampling is developed to automate and accelerate the design of a front-loading washing machine. The research aims to address challenges associated with the model parameterization and global optimization and design. A multibody dynamics model of the washing machine incorporating a set of 9 key design variables is developed. The design variables are implemented to enable automated modifications of the dynamics model for …

Enhancing The Security In High-Speed Networks Using P4 Programmable Switches, Ali Alsabeh

Theses and Dissertations

Network security has become increasingly essential in today's networks due to the growth of various network applications, such as Machine Learning (ML) and Fifth-Generation (5G) Networks. One fundamental Internet protocol is the Domain Name System (DNS), which maps domain names to Internet Protocol (IP) addresses. Despite its importance, DNS traffic is often forwarded without being analyzed, making it a center of ever-evolving attacks. Traditionally, defense strategies are implemented on fixed-function security middleboxes that are costly, proprietary, and hard to manage. Alternatively, defenses implemented in software use general-purpose servers (e.g., the control plane of a Software-Defined Networking (SDN) network) that cannot …

Malware Classification Using Dynamically Extracted Api Call Embeddings, Sahil Aggarwal, Fabio Di Troia

Faculty Research, Scholarly, and Creative Activity

Malware classification stands as a crucial element in establishing robust computer security protocols, encompassing the segmentation of malware into discrete groupings. Recently, the emergence of machine learning has presented itself as an apt approach for addressing this challenge. Models can undergo training employing diverse malware attributes, such as opcodes and API calls, to distill valuable insights for effective classification. Within the realm of natural language processing, word embeddings assume a pivotal role by representing text in a manner that aligns closely with the proximity of similar words. These embeddings facilitate the quantification of word resemblances. This research embarks on a …

Characteristics Of Pyrolysis Products Of California Chaparral And Their Potential Effect On Wildland Fires, Mahsa Alizadeh, David R. Weise, Thomas H. Fletcher

Faculty Publications

The aim of this study was to investigate the pyrolysis of selected California foliage and estimate the energy content of the released volatiles to show the significance of the pyrolysis of foliage and its role during wildland fires. While the majority of the volatiles released during the pyrolysis of foliage later combust and promote fire propagation, studies on the energy released from combustion of these compounds are scarce. Samples of chamise (Adenostoma fasciculatum), Eastwood’s manzanita (Arctostaphylos glandulosa), scrub oak (Quercus berberidifolia), hoaryleaf ceanothus (Ceanothus crassifolius), all native to southern California, and sparkleberry …

Derivative Propagation Through Vortex Particle Method Simulation, Eric Green, Andrew Ning

Faculty Publications

Automatic differentiation (AD) is a powerful tool for evaluating numerical derivatives. In particular, reverse-mode AD provides numerical gradients in a way that is insensitive to the number of input variables. This makes reverse-mode AD well-suited for solving large optimization problems. However, reverse-mode AD has a particularly large associated memory cost because most intermediate values in operations need to be cached. This is problematic for large problems such as aerodynamics simulations, though, since the memory requirements can quickly become impractical. The solution implemented in this work is to provide analytic pullback expressions for functions for which many of the intermediate values …

Trajectory Optimization Of Evtol And Conventional Aircraft: A Comparative Analysis Of Vortex Particle Method And Vortex Lattice + Blade Element Momentum Theory, Andrew Tagg, Ryan Anderson, Cibin Joseph, Andrew Ning

Faculty Publications

Trajectory optimization of aircraft transition maneuvers can significantly influence the design of these systems, particularly when making decisions about aircraft geometry, propulsion sizing, and control system design. This paper presents the trajectory optimization of air vehicles including electric vertical takeoff and landing (eVTOL) as well as conventional aircraft. The study evaluates the influence of fidelity in trajectory design by comparing the use of two aerodynamic methods in the context of trajectory optimization. The mid-fidelity method utilizes a vortex lattice method (VLM) to model lifting surfaces while employing blade element momentum theory (BEMT) to model rudimentary rotor-wing interactions. The high-fidelity approach …

Influence Of Language Evolution And Compiler Advances On Program Creation: Implications To Electronics Engineering Education, Ralph Anthony Ramos Rafael, King Harold A. Recto

Electronics, Computer, and Communications Engineering Faculty Publications

The progression of programming languages, from machine and assembly languages to high-level and very high-level languages, and now towards natural language processing and artificial intelligence, has significantly influenced program creation and assembly. Each generation has brought notable advancements in abstraction, readability, and usability, making programming increasingly accessible and efficient. Early languages such as machine and assembly languages were hardware-dependent and low-level, concentrating on direct interaction with hardware. This paradigm shifted significantly with the emergence of high-level languages, which abstracted hardware specifics and emphasized logic and functionality. These shifts have had profound impacts, particularly in Engineering Education, by potentially reducing the …